Refactor: use RunE and root error handler (#127)

* Add test of refreshing token with TLS cert

* Fix TLS certificate on refreshing token (#123)

.circleci/config.yml

@@ -11,15 +11,15 @@ jobs:
           curl -L -o ~/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/v1.14.0/bin/linux/amd64/kubectl
           chmod +x ~/bin/kubectl
       - run: |
-          go get -v \
-            golang.org/x/lint/golint \
-            github.com/int128/goxzst \
-            github.com/tcnksm/ghr \
-            github.com/int128/ghcp
+          curl -L -o ~/bin/ghcp https://github.com/int128/ghcp/releases/download/v1.5.0/ghcp_linux_amd64
+          chmod +x ~/bin/ghcp
+      - run: |
+          curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b ~/bin v1.16.0
+      - run: go get github.com/int128/goxzst
+      - run: go get github.com/tcnksm/ghr
       - checkout
-      # workaround for https://github.com/golang/go/issues/27925
-      - run: sed -e '/^k8s.io\/client-go /d' -i go.sum
       - run: make check
+      - run: bash <(curl -s https://codecov.io/bash)
       - run: make run
       - run: |
           if [ "$CIRCLE_TAG" ]; then

.gitignore

@@ -1,5 +1,9 @@
 /.idea
+
+/.kubeconfig*
+
 /dist
+/coverage.out
+
 /kubelogin
 /kubectl-oidc_login
-/.kubeconfig

DESIGN.md

@@ -0,0 +1,47 @@
+# Design of kubelogin
+
+This explains design of kubelogin.
+
+## Use cases
+
+Kubelogin is a command line tool and designed to run as both a standalone command and a kubectl plugin.
+
+It respects the following flags, commonly used in kubectl:
+
+```
+      --kubeconfig string              Path to the kubeconfig file
+      --context string                 The name of the kubeconfig context to use
+      --user string                    The name of the kubeconfig user to use. Prior to --context
+      --certificate-authority string   Path to a cert file for the certificate authority
+      --insecure-skip-tls-verify       If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
+  -v, --v int                          If set to 1 or greater, it shows debug log
+```
+
+As well as it respects the environment variable `KUBECONFIG`.
+
+
+### Login by the command
+
+TODO
+
+
+## Architecture
+
+Kubelogin consists of the following layers:
+
+- `usecases`: This provides the use-cases.
+- `adaptor`: This provides external access and converts objects between the use-cases and external system.
+
+
+### Use-cases
+
+This provides the use-cases mentioned in the previous section.
+
+This layer should not contain external access such as HTTP requests and system calls.
+
+
+### Adaptor
+
+This provides external access such as command line interface and HTTP requests.
+
+

Makefile

@@ -3,15 +3,14 @@ TARGET_PLUGIN := kubectl-oidc_login
 CIRCLE_TAG ?= HEAD
 LDFLAGS := -X main.version=$(CIRCLE_TAG)
 
-.PHONY: check run release clean
+.PHONY: check run diagram release clean
 
 all: $(TARGET)
 
 check:
-	golint
-	go vet
-	$(MAKE) -C adaptors_test/keys/testdata
-	go test -v -race ./...
+	golangci-lint run
+	$(MAKE) -C e2e_test/keys/testdata
+	go test -v -race -cover -coverprofile=coverage.out ./...
 
 $(TARGET): $(wildcard *.go)
 	go build -o $@ -ldflags "$(LDFLAGS)"
@@ -22,13 +21,21 @@ $(TARGET_PLUGIN): $(TARGET)
 run: $(TARGET_PLUGIN)
 	-PATH=.:$(PATH) kubectl oidc-login --help
 
+diagram: docs/authn.png
+
+%.png: %.seqdiag
+	seqdiag -a -f /Library/Fonts/Verdana.ttf $<
+
 dist:
 	VERSION=$(CIRCLE_TAG) goxzst -d dist/gh/ -o "$(TARGET)" -t "kubelogin.rb oidc-login.yaml" -- -ldflags "$(LDFLAGS)"
 	mv dist/gh/kubelogin.rb dist/
+	mkdir -p dist/plugins
+	cp dist/gh/oidc-login.yaml dist/plugins/oidc-login.yaml
 
 release: dist
 	ghr -u "$(CIRCLE_PROJECT_USERNAME)" -r "$(CIRCLE_PROJECT_REPONAME)" "$(CIRCLE_TAG)" dist/gh/
-	ghcp -u "$(CIRCLE_PROJECT_USERNAME)" -r "homebrew-$(CIRCLE_PROJECT_REPONAME)" -m "$(CIRCLE_TAG)" -C dist/ kubelogin.rb
+	ghcp commit -u "$(CIRCLE_PROJECT_USERNAME)" -r "homebrew-$(CIRCLE_PROJECT_REPONAME)" -m "$(CIRCLE_TAG)" -C dist/ kubelogin.rb
+	ghcp fork-commit -u kubernetes-sigs -r krew-index -b "oidc-login-$(CIRCLE_TAG)" -m "Bump oidc-login to $(CIRCLE_TAG)" -C dist/ plugins/oidc-login.yaml
 
 clean:
 	-rm $(TARGET)

README.md

@@ -1,18 +1,13 @@
-# kubelogin [![CircleCI](https://circleci.com/gh/int128/kubelogin.svg?style=shield)](https://circleci.com/gh/int128/kubelogin)
+# kubelogin [![CircleCI](https://circleci.com/gh/int128/kubelogin.svg?style=shield)](https://circleci.com/gh/int128/kubelogin) [![Go Report Card](https://goreportcard.com/badge/github.com/int128/kubelogin)](https://goreportcard.com/report/github.com/int128/kubelogin)
 
-This is a kubectl plugin for [Kubernetes OpenID Connect (OIDC) authentication](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#openid-connect-tokens).
-It gets a token from the OIDC provider and writes it to the kubeconfig.
+This is a kubectl plugin for [Kubernetes OpenID Connect (OIDC) authentication](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#openid-connect-tokens), also known as `kubectl oidc-login`.
+
+Kubelogin integrates browser based authentication with kubectl.
+You do not need to manually set an ID token and refresh token to the kubeconfig.
 
 
 ## Getting Started
 
-You need to setup the following components:
-
-- OIDC provider
-- Kubernetes API server
-- Role for your group or user
-- kubectl authentication
-
 You can install the latest release from [Homebrew](https://brew.sh/), [Krew](https://github.com/kubernetes-sigs/krew) or [GitHub Releases](https://github.com/int128/kubelogin/releases) as follows:
 
 ```sh
@@ -24,58 +19,245 @@ brew install kubelogin
 kubectl krew install oidc-login
 
 # GitHub Releases
-curl -LO https://github.com/int128/kubelogin/releases/download/v1.9.1/kubelogin_linux_amd64.zip
+curl -LO https://github.com/int128/kubelogin/releases/download/v1.14.0/kubelogin_linux_amd64.zip
 unzip kubelogin_linux_amd64.zip
 ln -s kubelogin kubectl-oidc_login
 ```
 
-After initial setup or when the token has been expired, just run:
-
-```
-% kubelogin
-Using current-context: hello.k8s.local
-Open http://localhost:8000 for authorization
-Got a token for subject 0123456789 (valid until 2019-04-12 11:00:49 +0900 JST)
-Updated ~/.kube/config
-```
-
-or run as a kubectl plugin:
-
-```
-% kubectl oidc-login
-```
-
-It opens the browser and you can log in to the provider.
-After authentication, it gets an ID token and refresh token and writes them to the kubeconfig.
-
-For more, see the following documents:
+You need to configure the OIDC provider, Kubernetes API server, kubeconfig and role binding.
+See the following documents for more:
 
 - [Getting Started with Keycloak](docs/keycloak.md)
 - [Getting Started with Google Identity Platform](docs/google.md)
 - [Team Operation](docs/team_ops.md)
 
+You can run kubelogin as the following methods:
+
+- Run as a credential plugin
+- Run as a standalone command
+
+
+### Run as a credential plugin
+
+You can run kubelogin as a [client-go credential plugin](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins).
+This provides transparent login without manually running `kubelogin` command.
+
+Configure the kubeconfig like:
+
+```yaml
+users:
+- name: keycloak
+  user:
+    exec:
+      apiVersion: client.authentication.k8s.io/v1beta1
+      command: kubectl
+      args:
+      - oidc-login
+      - get-token
+      - --oidc-issuer-url=https://issuer.example.com
+      - --oidc-client-id=YOUR_CLIENT_ID
+      - --oidc-client-secret=YOUR_CLIENT_SECRET
+```
+
+Run kubectl.
+
+```sh
+kubectl get pods
+```
+
+Kubectl executes kubelogin before calling the Kubernetes APIs.
+Kubelogin automatically opens the browser and you can log in to the provider.
+
+<img src="docs/keycloak-login.png" alt="keycloak-login" width="455" height="329">
+
+After authentication, kubelogin returns the credentials to kubectl and finally kubectl calls the Kubernetes APIs with the credential.
+
+```
+% kubectl get pods
+Open http://localhost:8000 for authentication
+You got a valid token until 2019-05-18 10:28:51 +0900 JST
+NAME                          READY   STATUS    RESTARTS   AGE
+echoserver-86c78fdccd-nzmd5   1/1     Running   0          26d
+```
+
+Kubelogin writes the ID token and refresh token to the token cache file.
+
+If the cached ID token is valid, kubelogin just returns it.
+If the cached ID token has expired, kubelogin will refresh the token using the refresh token.
+If the refresh token has expired, kubelogin will perform reauthentication.
+
+You can log out by removing the token cache file (default `~/.kube/oidc-login.token-cache`).
+Kubelogin will perform authentication if the token cache file does not exist.
+
+
+### Run as a standalone command
+
+You can run kubelogin as a standalone command.
+In this method, you need to manually run the command before running kubectl.
+
+Configure the kubeconfig like:
+
+```yaml
+- name: keycloak
+  user:
+    auth-provider:
+      config:
+        client-id: YOUR_CLIENT_ID
+        client-secret: YOUR_CLIENT_SECRET
+        idp-issuer-url: https://issuer.example.com
+      name: oidc
+```
+
+Run kubelogin:
+
+```sh
+kubelogin
+
+# or run as a kubectl plugin
+kubectl oidc-login
+```
+
+It automatically opens the browser and you can log in to the provider.
+
+<img src="docs/keycloak-login.png" alt="keycloak-login" width="455" height="329">
+
+After authentication, kubelogin writes the ID token and refresh token to the kubeconfig.
+
+```
+% kubelogin
+Open http://localhost:8000 for authentication
+You got a valid token until 2019-05-18 10:28:51 +0900 JST
+Updated ~/.kubeconfig
+```
+
+Now you can access to the cluster.
+
+```
+% kubectl get pods
+NAME                          READY   STATUS    RESTARTS   AGE
+echoserver-86c78fdccd-nzmd5   1/1     Running   0          26d
+```
+
+If the ID token is valid, kubelogin does nothing.
+
+```
+% kubelogin
+You already have a valid token until 2019-05-18 10:28:51 +0900 JST
+```
+
+If the ID token has expired, kubelogin will refresh the token using the refresh token in the kubeconfig.
+If the refresh token has expired, kubelogin will proceed the authentication.
+
 
 ## Configuration
 
-This supports the following options.
+This document is for the development version.
+If you are looking for a specific version, see [the release tags](https://github.com/int128/kubelogin/tags).
+
+
+### Run as a credential plugin
+
+Kubelogin supports the following options:
 
 ```
-  kubelogin [OPTIONS]
+% kubelogin get-token -h
+Run as a kubectl credential plugin
 
-Application Options:
-      --kubeconfig=               Path to the kubeconfig file (default: ~/.kube/config) [$KUBECONFIG]
-      --listen-port=              Port used by kubelogin to bind its webserver (default: 8000) [$KUBELOGIN_LISTEN_PORT]
-      --insecure-skip-tls-verify  If set, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
-                                  [$KUBELOGIN_INSECURE_SKIP_TLS_VERIFY]
-      --skip-open-browser         If set, it does not open the browser on authentication. [$KUBELOGIN_SKIP_OPEN_BROWSER]
-  -v, --v=                        If set to 1 or greater, show debug log (default: 0)
+Usage:
+  kubelogin get-token [flags]
 
-Help Options:
-  -h, --help        Show this help message
+Flags:
+      --listen-port ints               Port to bind to the local server. If multiple ports are given, it will try the ports in order (default [8000,18000])
+      --skip-open-browser              If true, it does not open the browser on authentication
+      --username string                If set, perform the resource owner password credentials grant
+      --password string                If set, use the password instead of asking it
+      --oidc-issuer-url string         Issuer URL of the provider (mandatory)
+      --oidc-client-id string          Client ID of the provider (mandatory)
+      --oidc-client-secret string      Client secret of the provider
+      --oidc-extra-scope strings       Scopes to request to the provider
+      --certificate-authority string   Path to a cert file for the certificate authority
+      --insecure-skip-tls-verify       If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
+  -v, --v int                          If set to 1 or greater, it shows debug log
+      --token-cache string             Path to a file for caching the token (default "~/.kube/oidc-login.token-cache")
+  -h, --help                           help for get-token
 ```
 
-This also supports the following keys of `auth-provider` in kubeconfig.
-See [kubectl authentication](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#using-kubectl).
+#### Extra scopes
+
+You can set the extra scopes to request to the provider by `--oidc-extra-scope`.
+
+```yaml
+      - --oidc-extra-scope=email
+      - --oidc-extra-scope=profile
+```
+
+#### CA Certificates
+
+You can use your self-signed certificates for the provider.
+
+```yaml
+      - --certificate-authority=/home/user/.kube/keycloak-ca.pem
+```
+
+
+### Run as a standalone command
+
+Kubelogin supports the following options:
+
+```
+% kubelogin -h
+Login to the OpenID Connect provider and update the kubeconfig
+
+Usage:
+  kubelogin [flags]
+  kubelogin [command]
+
+Examples:
+  # Login to the provider using the authorization code flow.
+  kubelogin
+
+  # Login to the provider using the resource owner password credentials flow.
+  kubelogin --username USERNAME --password PASSWORD
+
+  # Run as a credential plugin.
+  kubelogin get-token --oidc-issuer-url=https://issuer.example.com
+
+Available Commands:
+  get-token   Run as a kubectl credential plugin
+  help        Help about any command
+  version     Print the version information
+
+Flags:
+      --kubeconfig string              Path to the kubeconfig file
+      --context string                 The name of the kubeconfig context to use
+      --user string                    The name of the kubeconfig user to use. Prior to --context
+      --certificate-authority string   Path to a cert file for the certificate authority
+      --insecure-skip-tls-verify       If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
+  -v, --v int                          If set to 1 or greater, it shows debug log
+      --listen-port ints               Port to bind to the local server. If multiple ports are given, it will try the ports in order (default [8000,18000])
+      --skip-open-browser              If true, it does not open the browser on authentication
+      --username string                If set, perform the resource owner password credentials grant
+      --password string                If set, use the password instead of asking it
+  -h, --help                           help for kubelogin
+```
+
+#### Kubeconfig
+
+You can set path to the kubeconfig file by the option or the environment variable just like kubectl.
+It defaults to `~/.kube/config`.
+
+```sh
+# by the option
+kubelogin --kubeconfig /path/to/kubeconfig
+
+# by the environment variable
+KUBECONFIG="/path/to/kubeconfig1:/path/to/kubeconfig2" kubelogin
+```
+
+If you set multiple files, kubelogin will find the file which has the current authentication (i.e. `user` and `auth-provider`) and write a token to it.
+
+Kubelogin supports the following keys of `auth-provider` in a kubeconfig.
+See [kubectl authentication](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#using-kubectl) for more.
 
 Key | Direction | Value
 ----|-----------|------
@@ -88,44 +270,30 @@ Key | Direction | Value
 `id-token`                        | Write | ID token got from the provider.
 `refresh-token`                   | Write | Refresh token got from the provider.
 
+#### Extra scopes
 
-### Kubeconfig path
-
-You can set the environment variable `KUBECONFIG` to point the config file.
-Default to `~/.kube/config`.
-
-```sh
-export KUBECONFIG="$PWD/.kubeconfig"
-```
-
-
-### Extra scopes
-
-You can set extra scopes to request to the provider by `extra-scopes` in the kubeconfig.
+You can set the extra scopes to request to the provider by `extra-scopes` in the kubeconfig.
 
 ```sh
 kubectl config set-credentials keycloak --auth-provider-arg extra-scopes=email
 ```
 
-Note that kubectl does not accept multiple scopes and you need to edit the kubeconfig as like:
+Currently kubectl does not accept multiple scopes, so you need to edit the kubeconfig as like:
 
 ```sh
 kubectl config set-credentials keycloak --auth-provider-arg extra-scopes=SCOPES
 sed -i '' -e s/SCOPES/email,profile/ $KUBECONFIG
 ```
 
+#### CA Certificates
 
-### CA Certificates
-
-You can set your self-signed certificates for the OIDC provider (not Kubernetes API server) by `idp-certificate-authority` and `idp-certificate-authority-data` in the kubeconfig.
+You can use your self-signed certificates for the provider.
 
 ```sh
 kubectl config set-credentials keycloak \
   --auth-provider-arg idp-certificate-authority=$HOME/.kube/keycloak-ca.pem
 ```
 
-If kubelogin could not parse the certificate, it shows a warning and skips it.
-
 
 ### HTTP Proxy
 
@@ -133,8 +301,63 @@ You can set the following environment variables if you are behind a proxy: `HTTP
 See also [net/http#ProxyFromEnvironment](https://golang.org/pkg/net/http/#ProxyFromEnvironment).
 
 
+### Authentication flows
+
+#### Authorization code flow
+
+Kubelogin performs the authorization code flow by default.
+
+It starts the local server at port 8000 or 18000 by default.
+You need to register the following redirect URIs to the provider:
+
+- `http://localhost:8000`
+- `http://localhost:18000` (used if port 8000 is already in use)
+
+You can change the ports by the option:
+
+```sh
+# run as a standalone command
+kubelogin --listen-port 12345 --listen-port 23456
+
+# run as a credential plugin
+kubelogin get-token --listen-port 12345 --listen-port 23456
+```
+
+
+#### Resource owner password credentials grant flow
+
+As well as you can use the resource owner password credentials grant flow.
+Keycloak supports this flow but you need to explicitly enable the "Direct Access Grants" feature in the client settings.
+Most OIDC providers do not support this flow.
+
+You can pass the username and password:
+
+```
+% kubelogin --username USER --password PASS
+```
+
+or use the password prompt:
+
+```
+% kubelogin --username USER
+Password:
+```
+
+
 ## Contributions
 
 This is an open source software licensed under Apache License 2.0.
-
 Feel free to open issues and pull requests for improving code and documents.
+
+### Development
+
+Go 1.12 or later is required.
+
+```sh
+# Run lint and tests
+make check
+
+# Compile and run the command
+make
+./kubelogin
+```

adaptors/cmd.go

@@ -1,75 +0,0 @@
-package adaptors
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/usecases/interfaces"
-	"github.com/jessevdk/go-flags"
-	"github.com/mitchellh/go-homedir"
-	"github.com/pkg/errors"
-	"go.uber.org/dig"
-)
-
-func NewCmd(i Cmd) adaptors.Cmd {
-	return &i
-}
-
-type Cmd struct {
-	dig.In
-	Login  usecases.Login
-	Logger adaptors.Logger
-}
-
-func (cmd *Cmd) Run(ctx context.Context, args []string, version string) int {
-	var o cmdOptions
-	parser := flags.NewParser(&o, flags.HelpFlag)
-	parser.LongDescription = fmt.Sprintf(`Version %s
-		This updates the kubeconfig for Kubernetes OpenID Connect (OIDC) authentication.`,
-		version)
-	args, err := parser.ParseArgs(args[1:])
-	if err != nil {
-		cmd.Logger.Printf("Error: %s", err)
-		return 1
-	}
-	if len(args) > 0 {
-		cmd.Logger.Printf("Error: too many arguments")
-		return 1
-	}
-	cmd.Logger.SetLevel(adaptors.LogLevel(o.Verbose))
-	kubeConfig, err := o.ExpandKubeConfig()
-	if err != nil {
-		cmd.Logger.Printf("Error: invalid option: %s", err)
-		return 1
-	}
-
-	in := usecases.LoginIn{
-		KubeConfig:      kubeConfig,
-		ListenPort:      o.ListenPort,
-		SkipTLSVerify:   o.SkipTLSVerify,
-		SkipOpenBrowser: o.SkipOpenBrowser,
-	}
-	if err := cmd.Login.Do(ctx, in); err != nil {
-		cmd.Logger.Printf("Error: %s", err)
-		return 1
-	}
-	return 0
-}
-
-type cmdOptions struct {
-	KubeConfig      string `long:"kubeconfig" default:"~/.kube/config" env:"KUBECONFIG" description:"Path to the kubeconfig file"`
-	ListenPort      int    `long:"listen-port" default:"8000" env:"KUBELOGIN_LISTEN_PORT" description:"Port used by kubelogin to bind its webserver"`
-	SkipTLSVerify   bool   `long:"insecure-skip-tls-verify" env:"KUBELOGIN_INSECURE_SKIP_TLS_VERIFY" description:"If set, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure"`
-	SkipOpenBrowser bool   `long:"skip-open-browser" env:"KUBELOGIN_SKIP_OPEN_BROWSER" description:"If set, it does not open the browser on authentication."`
-	Verbose         int    `long:"v" short:"v" default:"0" description:"If set to 1 or greater, show debug log"`
-}
-
-// ExpandKubeConfig returns an expanded KubeConfig path.
-func (c *cmdOptions) ExpandKubeConfig() (string, error) {
-	d, err := homedir.Expand(c.KubeConfig)
-	if err != nil {
-		return "", errors.Wrapf(err, "could not expand %s", c.KubeConfig)
-	}
-	return d, nil
-}

adaptors/cmd/cmd.go

@@ -0,0 +1,211 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"github.com/int128/kubelogin/usecases"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"golang.org/x/xerrors"
+	"k8s.io/client-go/util/homedir"
+)
+
+// Set provides an implementation and interface for Cmd.
+var Set = wire.NewSet(
+	wire.Struct(new(Cmd), "*"),
+	wire.Bind(new(adaptors.Cmd), new(*Cmd)),
+)
+
+const examples = `  # Login to the provider using the authorization code flow.
+  %[1]s
+
+  # Login to the provider using the resource owner password credentials flow.
+  %[1]s --username USERNAME --password PASSWORD
+
+  # Run as a credential plugin.
+  %[1]s get-token --oidc-issuer-url=https://issuer.example.com`
+
+var defaultListenPort = []int{8000, 18000}
+var defaultTokenCache = homedir.HomeDir() + "/.kube/oidc-login.token-cache"
+
+// Cmd provides interaction with command line interface (CLI).
+type Cmd struct {
+	Login    usecases.Login
+	GetToken usecases.GetToken
+	Logger   adaptors.Logger
+}
+
+// Run parses the command line arguments and executes the specified use-case.
+// It returns an exit code, that is 0 on success or 1 on error.
+func (cmd *Cmd) Run(ctx context.Context, args []string, version string) int {
+	executable := filepath.Base(args[0])
+
+	rootCmd := newRootCmd(ctx, executable, cmd)
+	rootCmd.Version = version
+	rootCmd.SilenceUsage = true
+	rootCmd.SilenceErrors = true
+
+	getTokenCmd := newGetTokenCmd(ctx, cmd)
+	rootCmd.AddCommand(getTokenCmd)
+
+	versionCmd := &cobra.Command{
+		Use:   "version",
+		Short: "Print the version information",
+		Args:  cobra.NoArgs,
+		Run: func(*cobra.Command, []string) {
+			cmd.Logger.Printf("%s version %s", executable, version)
+		},
+	}
+	rootCmd.AddCommand(versionCmd)
+
+	rootCmd.SetArgs(args[1:])
+	if err := rootCmd.Execute(); err != nil {
+		cmd.Logger.Printf("error: %s", err)
+		cmd.Logger.Debugf(1, "stacktrace: %+v", err)
+		return 1
+	}
+	return 0
+}
+
+// kubectlOptions represents kubectl specific options.
+type kubectlOptions struct {
+	Kubeconfig           string
+	Context              string
+	User                 string
+	CertificateAuthority string
+	SkipTLSVerify        bool
+	Verbose              int
+}
+
+func (o *kubectlOptions) register(f *pflag.FlagSet) {
+	f.SortFlags = false
+	f.StringVar(&o.Kubeconfig, "kubeconfig", "", "Path to the kubeconfig file")
+	f.StringVar(&o.Context, "context", "", "The name of the kubeconfig context to use")
+	f.StringVar(&o.User, "user", "", "The name of the kubeconfig user to use. Prior to --context")
+	f.StringVar(&o.CertificateAuthority, "certificate-authority", "", "Path to a cert file for the certificate authority")
+	f.BoolVar(&o.SkipTLSVerify, "insecure-skip-tls-verify", false, "If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure")
+	f.IntVarP(&o.Verbose, "v", "v", 0, "If set to 1 or greater, it shows debug log")
+}
+
+// loginOptions represents the options for Login use-case.
+type loginOptions struct {
+	ListenPort      []int
+	SkipOpenBrowser bool
+	Username        string
+	Password        string
+}
+
+func (o *loginOptions) register(f *pflag.FlagSet) {
+	f.SortFlags = false
+	f.IntSliceVar(&o.ListenPort, "listen-port", defaultListenPort, "Port to bind to the local server. If multiple ports are given, it will try the ports in order")
+	f.BoolVar(&o.SkipOpenBrowser, "skip-open-browser", false, "If true, it does not open the browser on authentication")
+	f.StringVar(&o.Username, "username", "", "If set, perform the resource owner password credentials grant")
+	f.StringVar(&o.Password, "password", "", "If set, use the password instead of asking it")
+}
+
+func newRootCmd(ctx context.Context, executable string, cmd *Cmd) *cobra.Command {
+	var o struct {
+		kubectlOptions
+		loginOptions
+	}
+	rootCmd := &cobra.Command{
+		Use:     executable,
+		Short:   "Login to the OpenID Connect provider and update the kubeconfig",
+		Example: fmt.Sprintf(examples, executable),
+		Args:    cobra.NoArgs,
+		RunE: func(*cobra.Command, []string) error {
+			cmd.Logger.SetLevel(adaptors.LogLevel(o.Verbose))
+			in := usecases.LoginIn{
+				KubeconfigFilename: o.Kubeconfig,
+				KubeconfigContext:  kubeconfig.ContextName(o.Context),
+				KubeconfigUser:     kubeconfig.UserName(o.User),
+				CACertFilename:     o.CertificateAuthority,
+				SkipTLSVerify:      o.SkipTLSVerify,
+				ListenPort:         o.ListenPort,
+				SkipOpenBrowser:    o.SkipOpenBrowser,
+				Username:           o.Username,
+				Password:           o.Password,
+			}
+			if err := cmd.Login.Do(ctx, in); err != nil {
+				return xerrors.Errorf("error: %w", err)
+			}
+			return nil
+		},
+	}
+	o.kubectlOptions.register(rootCmd.Flags())
+	o.loginOptions.register(rootCmd.Flags())
+	return rootCmd
+}
+
+// getTokenOptions represents the options for get-token command.
+type getTokenOptions struct {
+	loginOptions
+	IssuerURL            string
+	ClientID             string
+	ClientSecret         string
+	ExtraScopes          []string
+	CertificateAuthority string
+	SkipTLSVerify        bool
+	Verbose              int
+	TokenCacheFilename   string
+}
+
+func (o *getTokenOptions) register(f *pflag.FlagSet) {
+	f.SortFlags = false
+	o.loginOptions.register(f)
+	f.StringVar(&o.IssuerURL, "oidc-issuer-url", "", "Issuer URL of the provider (mandatory)")
+	f.StringVar(&o.ClientID, "oidc-client-id", "", "Client ID of the provider (mandatory)")
+	f.StringVar(&o.ClientSecret, "oidc-client-secret", "", "Client secret of the provider")
+	f.StringSliceVar(&o.ExtraScopes, "oidc-extra-scope", nil, "Scopes to request to the provider")
+	f.StringVar(&o.CertificateAuthority, "certificate-authority", "", "Path to a cert file for the certificate authority")
+	f.BoolVar(&o.SkipTLSVerify, "insecure-skip-tls-verify", false, "If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure")
+	f.IntVarP(&o.Verbose, "v", "v", 0, "If set to 1 or greater, it shows debug log")
+	f.StringVar(&o.TokenCacheFilename, "token-cache", defaultTokenCache, "Path to a file for caching the token")
+}
+
+func newGetTokenCmd(ctx context.Context, cmd *Cmd) *cobra.Command {
+	var o getTokenOptions
+	c := &cobra.Command{
+		Use:   "get-token [flags]",
+		Short: "Run as a kubectl credential plugin",
+		Args: func(c *cobra.Command, args []string) error {
+			if err := cobra.NoArgs(c, args); err != nil {
+				return err
+			}
+			if o.IssuerURL == "" {
+				return xerrors.New("--oidc-issuer-url is missing")
+			}
+			if o.ClientID == "" {
+				return xerrors.New("--oidc-client-id is missing")
+			}
+			return nil
+		},
+		RunE: func(*cobra.Command, []string) error {
+			cmd.Logger.SetLevel(adaptors.LogLevel(o.Verbose))
+			in := usecases.GetTokenIn{
+				IssuerURL:          o.IssuerURL,
+				ClientID:           o.ClientID,
+				ClientSecret:       o.ClientSecret,
+				ExtraScopes:        o.ExtraScopes,
+				CACertFilename:     o.CertificateAuthority,
+				SkipTLSVerify:      o.SkipTLSVerify,
+				ListenPort:         o.ListenPort,
+				SkipOpenBrowser:    o.SkipOpenBrowser,
+				Username:           o.Username,
+				Password:           o.Password,
+				TokenCacheFilename: o.TokenCacheFilename,
+			}
+			if err := cmd.GetToken.Do(ctx, in); err != nil {
+				return xerrors.Errorf("error: %w", err)
+			}
+			return nil
+		},
+	}
+	o.register(c.Flags())
+	return c
+}

adaptors/cmd/cmd_test.go

@@ -0,0 +1,206 @@
+package cmd
+
+import (
+	"context"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/mock_adaptors"
+	"github.com/int128/kubelogin/usecases"
+	"github.com/int128/kubelogin/usecases/mock_usecases"
+)
+
+func TestCmd_Run(t *testing.T) {
+	const executable = "kubelogin"
+	const version = "HEAD"
+
+	t.Run("login/Defaults", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+
+		login := mock_usecases.NewMockLogin(ctrl)
+		login.EXPECT().
+			Do(ctx, usecases.LoginIn{
+				ListenPort: defaultListenPort,
+			})
+
+		logger := mock_adaptors.NewLogger(t, ctrl)
+		logger.EXPECT().SetLevel(adaptors.LogLevel(0))
+
+		cmd := Cmd{
+			Login:  login,
+			Logger: logger,
+		}
+		exitCode := cmd.Run(ctx, []string{executable}, version)
+		if exitCode != 0 {
+			t.Errorf("exitCode wants 0 but %d", exitCode)
+		}
+	})
+
+	t.Run("login/FullOptions", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+
+		login := mock_usecases.NewMockLogin(ctrl)
+		login.EXPECT().
+			Do(ctx, usecases.LoginIn{
+				KubeconfigFilename: "/path/to/kubeconfig",
+				KubeconfigContext:  "hello.k8s.local",
+				KubeconfigUser:     "google",
+				CACertFilename:     "/path/to/cacert",
+				SkipTLSVerify:      true,
+				ListenPort:         []int{10080, 20080},
+				SkipOpenBrowser:    true,
+				Username:           "USER",
+				Password:           "PASS",
+			})
+
+		logger := mock_adaptors.NewLogger(t, ctrl)
+		logger.EXPECT().SetLevel(adaptors.LogLevel(1))
+
+		cmd := Cmd{
+			Login:  login,
+			Logger: logger,
+		}
+		exitCode := cmd.Run(ctx, []string{executable,
+			"--kubeconfig", "/path/to/kubeconfig",
+			"--context", "hello.k8s.local",
+			"--user", "google",
+			"--certificate-authority", "/path/to/cacert",
+			"--insecure-skip-tls-verify",
+			"-v1",
+			"--listen-port", "10080",
+			"--listen-port", "20080",
+			"--skip-open-browser",
+			"--username", "USER",
+			"--password", "PASS",
+		}, version)
+		if exitCode != 0 {
+			t.Errorf("exitCode wants 0 but %d", exitCode)
+		}
+	})
+
+	t.Run("login/TooManyArgs", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		cmd := Cmd{
+			Login:  mock_usecases.NewMockLogin(ctrl),
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		exitCode := cmd.Run(context.TODO(), []string{executable, "some"}, version)
+		if exitCode != 1 {
+			t.Errorf("exitCode wants 1 but %d", exitCode)
+		}
+	})
+
+	t.Run("get-token/Defaults", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+
+		getToken := mock_usecases.NewMockGetToken(ctrl)
+		getToken.EXPECT().
+			Do(ctx, usecases.GetTokenIn{
+				ListenPort:         defaultListenPort,
+				TokenCacheFilename: defaultTokenCache,
+				IssuerURL:          "https://issuer.example.com",
+				ClientID:           "YOUR_CLIENT_ID",
+			})
+
+		logger := mock_adaptors.NewLogger(t, ctrl)
+		logger.EXPECT().SetLevel(adaptors.LogLevel(0))
+
+		cmd := Cmd{
+			GetToken: getToken,
+			Logger:   logger,
+		}
+		exitCode := cmd.Run(ctx, []string{executable,
+			"get-token",
+			"--oidc-issuer-url", "https://issuer.example.com",
+			"--oidc-client-id", "YOUR_CLIENT_ID",
+		}, version)
+		if exitCode != 0 {
+			t.Errorf("exitCode wants 0 but %d", exitCode)
+		}
+	})
+
+	t.Run("get-token/FullOptions", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+
+		getToken := mock_usecases.NewMockGetToken(ctrl)
+		getToken.EXPECT().
+			Do(ctx, usecases.GetTokenIn{
+				TokenCacheFilename: defaultTokenCache,
+				IssuerURL:          "https://issuer.example.com",
+				ClientID:           "YOUR_CLIENT_ID",
+				ClientSecret:       "YOUR_CLIENT_SECRET",
+				ExtraScopes:        []string{"email", "profile"},
+				CACertFilename:     "/path/to/cacert",
+				SkipTLSVerify:      true,
+				ListenPort:         []int{10080, 20080},
+				SkipOpenBrowser:    true,
+				Username:           "USER",
+				Password:           "PASS",
+			})
+
+		logger := mock_adaptors.NewLogger(t, ctrl)
+		logger.EXPECT().SetLevel(adaptors.LogLevel(1))
+
+		cmd := Cmd{
+			GetToken: getToken,
+			Logger:   logger,
+		}
+		exitCode := cmd.Run(ctx, []string{executable,
+			"get-token",
+			"--oidc-issuer-url", "https://issuer.example.com",
+			"--oidc-client-id", "YOUR_CLIENT_ID",
+			"--oidc-client-secret", "YOUR_CLIENT_SECRET",
+			"--oidc-extra-scope", "email",
+			"--oidc-extra-scope", "profile",
+			"--certificate-authority", "/path/to/cacert",
+			"--insecure-skip-tls-verify",
+			"-v1",
+			"--listen-port", "10080",
+			"--listen-port", "20080",
+			"--skip-open-browser",
+			"--username", "USER",
+			"--password", "PASS",
+		}, version)
+		if exitCode != 0 {
+			t.Errorf("exitCode wants 0 but %d", exitCode)
+		}
+	})
+
+	t.Run("get-token/MissingMandatoryOptions", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		cmd := Cmd{
+			GetToken: mock_usecases.NewMockGetToken(ctrl),
+			Logger:   mock_adaptors.NewLogger(t, ctrl),
+		}
+		exitCode := cmd.Run(ctx, []string{executable, "get-token"}, version)
+		if exitCode != 1 {
+			t.Errorf("exitCode wants 1 but %d", exitCode)
+		}
+	})
+
+	t.Run("get-token/TooManyArgs", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		cmd := Cmd{
+			GetToken: mock_usecases.NewMockGetToken(ctrl),
+			Logger:   mock_adaptors.NewLogger(t, ctrl),
+		}
+		exitCode := cmd.Run(ctx, []string{executable, "get-token", "foo"}, version)
+		if exitCode != 1 {
+			t.Errorf("exitCode wants 1 but %d", exitCode)
+		}
+	})
+}

adaptors/cmd_test.go

@@ -1,98 +0,0 @@
-package adaptors
-
-import (
-	"context"
-	"testing"
-
-	"github.com/golang/mock/gomock"
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/adaptors/mock_adaptors"
-	"github.com/int128/kubelogin/usecases/interfaces"
-	"github.com/int128/kubelogin/usecases/mock_usecases"
-	"github.com/mitchellh/go-homedir"
-)
-
-func TestCmd_Run(t *testing.T) {
-	const executable = "kubelogin"
-	const version = "HEAD"
-
-	t.Run("Defaults", func(t *testing.T) {
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		login := mock_usecases.NewMockLogin(ctrl)
-		login.EXPECT().
-			Do(ctx, usecases.LoginIn{
-				KubeConfig: expand(t, "~/.kube/config"),
-				ListenPort: 8000,
-			})
-
-		logger := mock_adaptors.NewLogger(t, ctrl)
-		logger.EXPECT().
-			SetLevel(adaptors.LogLevel(0))
-
-		cmd := Cmd{
-			Login:  login,
-			Logger: logger,
-		}
-		exitCode := cmd.Run(ctx, []string{executable}, version)
-		if exitCode != 0 {
-			t.Errorf("exitCode wants 0 but %d", exitCode)
-		}
-	})
-
-	t.Run("FullOptions", func(t *testing.T) {
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		login := mock_usecases.NewMockLogin(ctrl)
-		login.EXPECT().
-			Do(ctx, usecases.LoginIn{
-				KubeConfig:      expand(t, "~/.kube/config"),
-				ListenPort:      10080,
-				SkipTLSVerify:   true,
-				SkipOpenBrowser: true,
-			})
-
-		logger := mock_adaptors.NewLogger(t, ctrl)
-		logger.EXPECT().
-			SetLevel(adaptors.LogLevel(1))
-
-		cmd := Cmd{
-			Login:  login,
-			Logger: logger,
-		}
-		exitCode := cmd.Run(ctx, []string{executable,
-			"--listen-port", "10080",
-			"--insecure-skip-tls-verify",
-			"--skip-open-browser",
-			"-v1",
-		}, version)
-		if exitCode != 0 {
-			t.Errorf("exitCode wants 0 but %d", exitCode)
-		}
-	})
-
-	t.Run("TooManyArgs", func(t *testing.T) {
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		cmd := Cmd{
-			Login:  mock_usecases.NewMockLogin(ctrl),
-			Logger: mock_adaptors.NewLogger(t, ctrl),
-		}
-		exitCode := cmd.Run(context.TODO(), []string{executable, "some"}, version)
-		if exitCode != 1 {
-			t.Errorf("exitCode wants 1 but %d", exitCode)
-		}
-	})
-}
-
-func expand(t *testing.T, path string) string {
-	d, err := homedir.Expand(path)
-	if err != nil {
-		t.Fatalf("could not expand: %s", err)
-	}
-	return d
-}

adaptors/credentialplugin/credential_plugin.go

@@ -0,0 +1,40 @@
+// Package credentialplugin provides interaction with kubectl for a credential plugin.
+package credentialplugin
+
+import (
+	"encoding/json"
+	"os"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"golang.org/x/xerrors"
+	"k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/pkg/apis/clientauthentication/v1beta1"
+)
+
+var Set = wire.NewSet(
+	wire.Struct(new(Interaction), "*"),
+	wire.Bind(new(adaptors.CredentialPluginInteraction), new(*Interaction)),
+)
+
+type Interaction struct{}
+
+// Write writes the ExecCredential to standard output for kubectl.
+func (*Interaction) Write(out credentialplugin.Output) error {
+	ec := &v1beta1.ExecCredential{
+		TypeMeta: v1.TypeMeta{
+			APIVersion: "client.authentication.k8s.io/v1beta1",
+			Kind:       "ExecCredential",
+		},
+		Status: &v1beta1.ExecCredentialStatus{
+			Token:               out.Token,
+			ExpirationTimestamp: &v1.Time{Time: out.Expiry},
+		},
+	}
+	e := json.NewEncoder(os.Stdout)
+	if err := e.Encode(ec); err != nil {
+		return xerrors.Errorf("could not write the ExecCredential: %w", err)
+	}
+	return nil
+}

adaptors/env/env.go

@@ -0,0 +1,36 @@
+package env
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"golang.org/x/crypto/ssh/terminal"
+	"golang.org/x/xerrors"
+)
+
+// Set provides an implementation and interface for Env.
+var Set = wire.NewSet(
+	wire.Struct(new(Env), "*"),
+	wire.Bind(new(adaptors.Env), new(*Env)),
+)
+
+// Env provides environment specific facilities.
+type Env struct{}
+
+// ReadPassword reads a password from the stdin without echo back.
+func (*Env) ReadPassword(prompt string) (string, error) {
+	if _, err := fmt.Fprint(os.Stderr, "Password: "); err != nil {
+		return "", xerrors.Errorf("could not write the prompt: %w", err)
+	}
+	b, err := terminal.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		return "", xerrors.Errorf("could not read: %w", err)
+	}
+	if _, err := fmt.Fprintln(os.Stderr); err != nil {
+		return "", xerrors.Errorf("could not write a new line: %w", err)
+	}
+	return string(b), nil
+}

adaptors/http.go

@@ -1,82 +0,0 @@
-package adaptors
-
-import (
-	"crypto/tls"
-	"crypto/x509"
-	"encoding/base64"
-	"io/ioutil"
-	"net/http"
-
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/infrastructure"
-	"github.com/pkg/errors"
-	"go.uber.org/dig"
-)
-
-func NewHTTP(i HTTP) adaptors.HTTP {
-	return &i
-}
-
-type HTTP struct {
-	dig.In
-	Logger adaptors.Logger
-}
-
-func (*HTTP) NewClientConfig() adaptors.HTTPClientConfig {
-	return &httpClientConfig{
-		certPool: x509.NewCertPool(),
-	}
-}
-
-func (h *HTTP) NewClient(config adaptors.HTTPClientConfig) (*http.Client, error) {
-	return &http.Client{
-		Transport: &infrastructure.LoggingTransport{
-			Base: &http.Transport{
-				TLSClientConfig: config.TLSConfig(),
-				Proxy:           http.ProxyFromEnvironment,
-			},
-			Logger: h.Logger,
-		},
-	}, nil
-}
-
-type httpClientConfig struct {
-	certPool      *x509.CertPool
-	skipTLSVerify bool
-}
-
-func (c *httpClientConfig) AddCertificateFromFile(filename string) error {
-	b, err := ioutil.ReadFile(filename)
-	if err != nil {
-		return errors.Wrapf(err, "could not read %s", filename)
-	}
-	if c.certPool.AppendCertsFromPEM(b) != true {
-		return errors.Errorf("could not append certificate from %s", filename)
-	}
-	return nil
-}
-
-func (c *httpClientConfig) AddEncodedCertificate(base64String string) error {
-	b, err := base64.StdEncoding.DecodeString(base64String)
-	if err != nil {
-		return errors.Wrapf(err, "could not decode base64")
-	}
-	if c.certPool.AppendCertsFromPEM(b) != true {
-		return errors.Errorf("could not append certificate")
-	}
-	return nil
-}
-
-func (c *httpClientConfig) TLSConfig() *tls.Config {
-	tlsConfig := &tls.Config{
-		InsecureSkipVerify: c.skipTLSVerify,
-	}
-	if len(c.certPool.Subjects()) > 0 {
-		tlsConfig.RootCAs = c.certPool
-	}
-	return tlsConfig
-}
-
-func (c *httpClientConfig) SetSkipTLSVerify(b bool) {
-	c.skipTLSVerify = b
-}

adaptors/interfaces.go

@@ -0,0 +1,106 @@
+package adaptors
+
+import (
+	"context"
+	"time"
+
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"github.com/int128/kubelogin/models/kubeconfig"
+)
+
+//go:generate mockgen -destination mock_adaptors/mock_adaptors.go github.com/int128/kubelogin/adaptors Kubeconfig,TokenCacheRepository,CredentialPluginInteraction,OIDC,OIDCClient,Env,Logger
+
+type Cmd interface {
+	Run(ctx context.Context, args []string, version string) int
+}
+
+type Kubeconfig interface {
+	GetCurrentAuthProvider(explicitFilename string, contextName kubeconfig.ContextName, userName kubeconfig.UserName) (*kubeconfig.AuthProvider, error)
+	UpdateAuthProvider(auth *kubeconfig.AuthProvider) error
+}
+
+type TokenCacheRepository interface {
+	Read(filename string) (*credentialplugin.TokenCache, error)
+	Write(filename string, tc credentialplugin.TokenCache) error
+}
+
+type CredentialPluginInteraction interface {
+	Write(out credentialplugin.Output) error
+}
+
+type OIDC interface {
+	New(ctx context.Context, config OIDCClientConfig) (OIDCClient, error)
+}
+
+// OIDCClientConfig represents a configuration of an OIDCClient to create.
+type OIDCClientConfig struct {
+	Config         kubeconfig.OIDCConfig
+	CACertFilename string
+	SkipTLSVerify  bool
+}
+
+type OIDCClient interface {
+	AuthenticateByCode(ctx context.Context, in OIDCAuthenticateByCodeIn) (*OIDCAuthenticateOut, error)
+	AuthenticateByPassword(ctx context.Context, in OIDCAuthenticateByPasswordIn) (*OIDCAuthenticateOut, error)
+	Verify(ctx context.Context, in OIDCVerifyIn) (*OIDCVerifyOut, error)
+	Refresh(ctx context.Context, in OIDCRefreshIn) (*OIDCAuthenticateOut, error)
+}
+
+// OIDCAuthenticateByCodeIn represents an input DTO of OIDCClient.AuthenticateByCode.
+type OIDCAuthenticateByCodeIn struct {
+	LocalServerPort    []int // HTTP server port candidates
+	SkipOpenBrowser    bool  // skip opening browser if true
+	ShowLocalServerURL interface{ ShowLocalServerURL(url string) }
+}
+
+// OIDCAuthenticateByPasswordIn represents an input DTO of OIDCClient.AuthenticateByPassword.
+type OIDCAuthenticateByPasswordIn struct {
+	Username string
+	Password string
+}
+
+// OIDCAuthenticateOut represents an output DTO of
+// OIDCClient.AuthenticateByCode, OIDCClient.AuthenticateByPassword and OIDCClient.Refresh.
+type OIDCAuthenticateOut struct {
+	IDToken       string
+	RefreshToken  string
+	IDTokenExpiry time.Time
+	IDTokenClaims map[string]string // string representation of claims for logging
+}
+
+// OIDCVerifyIn represents an input DTO of OIDCClient.Verify.
+type OIDCVerifyIn struct {
+	IDToken      string
+	RefreshToken string
+}
+
+// OIDCVerifyIn represents an output DTO of OIDCClient.Verify.
+type OIDCVerifyOut struct {
+	IDTokenExpiry time.Time
+	IDTokenClaims map[string]string // string representation of claims for logging
+}
+
+// OIDCRefreshIn represents an input DTO of OIDCClient.Refresh.
+type OIDCRefreshIn struct {
+	RefreshToken string
+}
+
+type Env interface {
+	ReadPassword(prompt string) (string, error)
+}
+
+type Logger interface {
+	Printf(format string, v ...interface{})
+	Debugf(level LogLevel, format string, v ...interface{})
+	SetLevel(level LogLevel)
+	IsEnabled(level LogLevel) bool
+}
+
+// LogLevel represents a log level for debug.
+//
+// 0 = None
+// 1 = Including in/out
+// 2 = Including transport headers
+// 3 = Including transport body
+//
+type LogLevel int

adaptors/interfaces/adaptors.go

@@ -1,82 +0,0 @@
-package adaptors
-
-import (
-	"context"
-	"crypto/tls"
-	"net/http"
-
-	"github.com/coreos/go-oidc"
-	"k8s.io/client-go/tools/clientcmd/api"
-)
-
-//go:generate mockgen -package mock_adaptors -destination ../mock_adaptors/mock_adaptors.go github.com/int128/kubelogin/adaptors/interfaces KubeConfig,HTTP,HTTPClientConfig,OIDC,Logger
-
-type Cmd interface {
-	Run(ctx context.Context, args []string, version string) int
-}
-
-type KubeConfig interface {
-	LoadFromFile(filename string) (*api.Config, error)
-	WriteToFile(config *api.Config, filename string) error
-}
-
-type HTTP interface {
-	NewClientConfig() HTTPClientConfig
-	NewClient(config HTTPClientConfig) (*http.Client, error)
-}
-
-type HTTPClientConfig interface {
-	AddCertificateFromFile(filename string) error
-	AddEncodedCertificate(base64String string) error
-	SetSkipTLSVerify(b bool)
-
-	TLSConfig() *tls.Config
-}
-
-type OIDC interface {
-	Authenticate(ctx context.Context, in OIDCAuthenticateIn, cb OIDCAuthenticateCallback) (*OIDCAuthenticateOut, error)
-	VerifyIDToken(ctx context.Context, in OIDCVerifyTokenIn) (*oidc.IDToken, error)
-}
-
-type OIDCAuthenticateIn struct {
-	Issuer          string
-	ClientID        string
-	ClientSecret    string
-	ExtraScopes     []string     // Additional scopes
-	Client          *http.Client // HTTP client for oidc and oauth2
-	LocalServerPort int          // HTTP server port
-	SkipOpenBrowser bool         // skip opening browser if true
-}
-
-type OIDCAuthenticateCallback struct {
-	ShowLocalServerURL func(url string)
-}
-
-type OIDCAuthenticateOut struct {
-	VerifiedIDToken *oidc.IDToken
-	IDToken         string
-	RefreshToken    string
-}
-
-type OIDCVerifyTokenIn struct {
-	IDToken  string
-	Issuer   string
-	ClientID string
-	Client   *http.Client
-}
-
-type Logger interface {
-	Printf(format string, v ...interface{})
-	Debugf(level LogLevel, format string, v ...interface{})
-	SetLevel(level LogLevel)
-	IsEnabled(level LogLevel) bool
-}
-
-// LogLevel represents a log level for debug.
-//
-// 0 = None
-// 1 = Including in/out
-// 2 = Including transport headers
-// 3 = Including transport body
-//
-type LogLevel int

adaptors/kubeconfig.go

@@ -1,30 +0,0 @@
-package adaptors
-
-import (
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/pkg/errors"
-	"k8s.io/client-go/tools/clientcmd"
-	"k8s.io/client-go/tools/clientcmd/api"
-)
-
-func NewKubeConfig() adaptors.KubeConfig {
-	return &KubeConfig{}
-}
-
-type KubeConfig struct{}
-
-func (*KubeConfig) LoadFromFile(filename string) (*api.Config, error) {
-	config, err := clientcmd.LoadFromFile(filename)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not read the kubeconfig from %s", filename)
-	}
-	return config, err
-}
-
-func (*KubeConfig) WriteToFile(config *api.Config, filename string) error {
-	err := clientcmd.WriteToFile(*config, filename)
-	if err != nil {
-		return errors.Wrapf(err, "could not write the kubeconfig to %s", filename)
-	}
-	return err
-}

adaptors/kubeconfig/kubeconfig.go

@@ -0,0 +1,14 @@
+package kubeconfig
+
+import (
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+)
+
+// Set provides an implementation and interface for Kubeconfig.
+var Set = wire.NewSet(
+	wire.Struct(new(Kubeconfig), "*"),
+	wire.Bind(new(adaptors.Kubeconfig), new(*Kubeconfig)),
+)
+
+type Kubeconfig struct{}

adaptors/kubeconfig/load.go

@@ -0,0 +1,85 @@
+package kubeconfig
+
+import (
+	"strings"
+
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"golang.org/x/xerrors"
+	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/client-go/tools/clientcmd/api"
+)
+
+func (*Kubeconfig) GetCurrentAuthProvider(explicitFilename string, contextName kubeconfig.ContextName, userName kubeconfig.UserName) (*kubeconfig.AuthProvider, error) {
+	config, err := loadByDefaultRules(explicitFilename)
+	if err != nil {
+		return nil, xerrors.Errorf("could not load kubeconfig: %w", err)
+	}
+	auth, err := findCurrentAuthProvider(config, contextName, userName)
+	if err != nil {
+		return nil, xerrors.Errorf("could not find the current auth provider: %w", err)
+	}
+	return auth, nil
+}
+
+func loadByDefaultRules(explicitFilename string) (*api.Config, error) {
+	rules := clientcmd.NewDefaultClientConfigLoadingRules()
+	rules.ExplicitPath = explicitFilename
+	config, err := rules.Load()
+	if err != nil {
+		return nil, xerrors.Errorf("error while loading config: %w", err)
+	}
+	return config, err
+}
+
+// findCurrentAuthProvider resolves the current auth provider.
+// If contextName is given, this returns the user of the context.
+// If userName is given, this ignores the context and returns the user.
+// If any context or user is not found, this returns an error.
+func findCurrentAuthProvider(config *api.Config, contextName kubeconfig.ContextName, userName kubeconfig.UserName) (*kubeconfig.AuthProvider, error) {
+	if userName == "" {
+		if contextName == "" {
+			contextName = kubeconfig.ContextName(config.CurrentContext)
+		}
+		contextNode, ok := config.Contexts[string(contextName)]
+		if !ok {
+			return nil, xerrors.Errorf("context %s does not exist", contextName)
+		}
+		userName = kubeconfig.UserName(contextNode.AuthInfo)
+	}
+	userNode, ok := config.AuthInfos[string(userName)]
+	if !ok {
+		return nil, xerrors.Errorf("user %s does not exist", userName)
+	}
+	if userNode.AuthProvider == nil {
+		return nil, xerrors.New("auth-provider is missing")
+	}
+	if userNode.AuthProvider.Name != "oidc" {
+		return nil, xerrors.Errorf("auth-provider.name must be oidc but is %s", userNode.AuthProvider.Name)
+	}
+	if userNode.AuthProvider.Config == nil {
+		return nil, xerrors.New("auth-provider.config is missing")
+	}
+	return &kubeconfig.AuthProvider{
+		LocationOfOrigin: userNode.LocationOfOrigin,
+		UserName:         userName,
+		ContextName:      contextName,
+		OIDCConfig:       makeOIDCConfig(userNode.AuthProvider.Config),
+	}, nil
+}
+
+func makeOIDCConfig(m map[string]string) kubeconfig.OIDCConfig {
+	var extraScopes []string
+	if m["extra-scopes"] != "" {
+		extraScopes = strings.Split(m["extra-scopes"], ",")
+	}
+	return kubeconfig.OIDCConfig{
+		IDPIssuerURL:                m["idp-issuer-url"],
+		ClientID:                    m["client-id"],
+		ClientSecret:                m["client-secret"],
+		IDPCertificateAuthority:     m["idp-certificate-authority"],
+		IDPCertificateAuthorityData: m["idp-certificate-authority-data"],
+		ExtraScopes:                 extraScopes,
+		IDToken:                     m["id-token"],
+		RefreshToken:                m["refresh-token"],
+	}
+}

adaptors/kubeconfig/load_test.go

@@ -0,0 +1,225 @@
+package kubeconfig
+
+import (
+	"os"
+	"testing"
+
+	"github.com/go-test/deep"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"k8s.io/client-go/tools/clientcmd/api"
+)
+
+func Test_loadByDefaultRules(t *testing.T) {
+	t.Run("google.yaml>keycloak.yaml", func(t *testing.T) {
+		setenv(t, "KUBECONFIG", "testdata/kubeconfig.google.yaml"+string(os.PathListSeparator)+"testdata/kubeconfig.keycloak.yaml")
+		defer unsetenv(t, "KUBECONFIG")
+
+		config, err := loadByDefaultRules("")
+		if err != nil {
+			t.Fatalf("Could not load the configs: %s", err)
+		}
+		if w := "google@hello.k8s.local"; w != config.CurrentContext {
+			t.Errorf("CurrentContext wants %s but %s", w, config.CurrentContext)
+		}
+		if _, ok := config.Contexts["google@hello.k8s.local"]; !ok {
+			t.Errorf("Contexts[google@hello.k8s.local] is missing")
+		}
+		if _, ok := config.Contexts["keycloak@hello.k8s.local"]; !ok {
+			t.Errorf("Contexts[keycloak@hello.k8s.local] is missing")
+		}
+		if _, ok := config.AuthInfos["google"]; !ok {
+			t.Errorf("AuthInfos[google] is missing")
+		}
+		if _, ok := config.AuthInfos["keycloak"]; !ok {
+			t.Errorf("AuthInfos[keycloak] is missing")
+		}
+	})
+
+	t.Run("keycloak.yaml>google.yaml", func(t *testing.T) {
+		setenv(t, "KUBECONFIG", "testdata/kubeconfig.keycloak.yaml"+string(os.PathListSeparator)+"testdata/kubeconfig.google.yaml")
+		defer unsetenv(t, "KUBECONFIG")
+
+		config, err := loadByDefaultRules("")
+		if err != nil {
+			t.Fatalf("Could not load the configs: %s", err)
+		}
+		if w := "keycloak@hello.k8s.local"; w != config.CurrentContext {
+			t.Errorf("CurrentContext wants %s but %s", w, config.CurrentContext)
+		}
+		if _, ok := config.Contexts["google@hello.k8s.local"]; !ok {
+			t.Errorf("Contexts[google@hello.k8s.local] is missing")
+		}
+		if _, ok := config.Contexts["keycloak@hello.k8s.local"]; !ok {
+			t.Errorf("Contexts[keycloak@hello.k8s.local] is missing")
+		}
+		if _, ok := config.AuthInfos["google"]; !ok {
+			t.Errorf("AuthInfos[google] is missing")
+		}
+		if _, ok := config.AuthInfos["keycloak"]; !ok {
+			t.Errorf("AuthInfos[keycloak] is missing")
+		}
+	})
+}
+
+func setenv(t *testing.T, key, value string) {
+	t.Helper()
+	if err := os.Setenv(key, value); err != nil {
+		t.Fatalf("Could not set the env var %s=%s: %s", key, value, err)
+	}
+}
+
+func unsetenv(t *testing.T, key string) {
+	t.Helper()
+	if err := os.Unsetenv(key); err != nil {
+		t.Fatalf("Could not unset the env var %s: %s", key, err)
+	}
+}
+
+func Test_findCurrentAuthProvider(t *testing.T) {
+	t.Run("CurrentContext", func(t *testing.T) {
+		auth, err := findCurrentAuthProvider(&api.Config{
+			CurrentContext: "theContext",
+			Contexts: map[string]*api.Context{
+				"theContext": {
+					AuthInfo: "theUser",
+				},
+			},
+			AuthInfos: map[string]*api.AuthInfo{
+				"theUser": {
+					LocationOfOrigin: "/path/to/kubeconfig",
+					AuthProvider: &api.AuthProviderConfig{
+						Name: "oidc",
+						Config: map[string]string{
+							"idp-issuer-url":                 "https://accounts.google.com",
+							"client-id":                      "GOOGLE_CLIENT_ID",
+							"client-secret":                  "GOOGLE_CLIENT_SECRET",
+							"idp-certificate-authority":      "/path/to/cert",
+							"idp-certificate-authority-data": "BASE64",
+							"extra-scopes":                   "email,profile",
+							"id-token":                       "YOUR_ID_TOKEN",
+							"refresh-token":                  "YOUR_REFRESH_TOKEN",
+						},
+					},
+				},
+			},
+		}, "", "")
+		if err != nil {
+			t.Fatalf("Could not find the current auth: %s", err)
+		}
+		want := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "theUser",
+			ContextName:      "theContext",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL:                "https://accounts.google.com",
+				ClientID:                    "GOOGLE_CLIENT_ID",
+				ClientSecret:                "GOOGLE_CLIENT_SECRET",
+				IDPCertificateAuthority:     "/path/to/cert",
+				IDPCertificateAuthorityData: "BASE64",
+				ExtraScopes:                 []string{"email", "profile"},
+				IDToken:                     "YOUR_ID_TOKEN",
+				RefreshToken:                "YOUR_REFRESH_TOKEN",
+			},
+		}
+		if diff := deep.Equal(want, auth); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("ByContextName", func(t *testing.T) {
+		auth, err := findCurrentAuthProvider(&api.Config{
+			Contexts: map[string]*api.Context{
+				"theContext": {
+					AuthInfo: "theUser",
+				},
+			},
+			AuthInfos: map[string]*api.AuthInfo{
+				"theUser": {
+					LocationOfOrigin: "/path/to/kubeconfig",
+					AuthProvider: &api.AuthProviderConfig{
+						Name: "oidc",
+						Config: map[string]string{
+							"idp-issuer-url": "https://accounts.google.com",
+						},
+					},
+				},
+			},
+		}, "theContext", "")
+		if err != nil {
+			t.Fatalf("Could not find the current auth: %s", err)
+		}
+		want := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "theUser",
+			ContextName:      "theContext",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+			},
+		}
+		if diff := deep.Equal(want, auth); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("ByUserName", func(t *testing.T) {
+		auth, err := findCurrentAuthProvider(&api.Config{
+			AuthInfos: map[string]*api.AuthInfo{
+				"theUser": {
+					LocationOfOrigin: "/path/to/kubeconfig",
+					AuthProvider: &api.AuthProviderConfig{
+						Name: "oidc",
+						Config: map[string]string{
+							"idp-issuer-url": "https://accounts.google.com",
+						},
+					},
+				},
+			},
+		}, "", "theUser")
+		if err != nil {
+			t.Fatalf("Could not find the current auth: %s", err)
+		}
+		want := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "theUser",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+			},
+		}
+		if diff := deep.Equal(want, auth); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("NoConfig", func(t *testing.T) {
+		_, err := findCurrentAuthProvider(&api.Config{
+			AuthInfos: map[string]*api.AuthInfo{
+				"theUser": {
+					LocationOfOrigin: "/path/to/kubeconfig",
+					AuthProvider: &api.AuthProviderConfig{
+						Name: "oidc",
+					},
+				},
+			},
+		}, "", "theUser")
+		if err == nil {
+			t.Fatalf("wants error but nil")
+		}
+	})
+
+	t.Run("NotOIDC", func(t *testing.T) {
+		_, err := findCurrentAuthProvider(&api.Config{
+			AuthInfos: map[string]*api.AuthInfo{
+				"theUser": {
+					LocationOfOrigin: "/path/to/kubeconfig",
+					AuthProvider: &api.AuthProviderConfig{
+						Name:   "some",
+						Config: map[string]string{"foo": "bar"},
+					},
+				},
+			},
+		}, "", "theUser")
+		if err == nil {
+			t.Fatalf("wants error but nil")
+		}
+	})
+}

adaptors/kubeconfig/testdata/kubeconfig.google.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+clusters: []
+contexts:
+  - context:
+      cluster: hello.k8s.local
+      user: google
+    name: google@hello.k8s.local
+current-context: google@hello.k8s.local
+kind: Config
+preferences: {}
+users:
+  - name: google
+    user:
+      auth-provider:
+        config:
+          client-id: CLIENT_ID.apps.googleusercontent.com
+        name: oidc

adaptors/kubeconfig/testdata/kubeconfig.keycloak.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+contexts:
+  - context:
+      cluster: hello.k8s.local
+      user: keycloak
+    name: keycloak@hello.k8s.local
+current-context: keycloak@hello.k8s.local
+kind: Config
+preferences: {}
+users:
+  - name: keycloak
+    user:
+      auth-provider:
+        config:
+          client-id: kubernetes
+        name: oidc

adaptors/kubeconfig/write.go

@@ -0,0 +1,51 @@
+package kubeconfig
+
+import (
+	"strings"
+
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"golang.org/x/xerrors"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+func (*Kubeconfig) UpdateAuthProvider(auth *kubeconfig.AuthProvider) error {
+	config, err := clientcmd.LoadFromFile(auth.LocationOfOrigin)
+	if err != nil {
+		return xerrors.Errorf("could not load %s: %w", auth.LocationOfOrigin, err)
+	}
+	userNode, ok := config.AuthInfos[string(auth.UserName)]
+	if !ok {
+		return xerrors.Errorf("user %s does not exist", auth.UserName)
+	}
+	if userNode.AuthProvider == nil {
+		return xerrors.Errorf("auth-provider is missing")
+	}
+	if userNode.AuthProvider.Name != "oidc" {
+		return xerrors.Errorf("auth-provider must be oidc but is %s", userNode.AuthProvider.Name)
+	}
+	copyOIDCConfig(auth.OIDCConfig, userNode.AuthProvider.Config)
+	if err := clientcmd.WriteToFile(*config, auth.LocationOfOrigin); err != nil {
+		return xerrors.Errorf("could not update %s: %w", auth.LocationOfOrigin, err)
+	}
+	return nil
+}
+
+func copyOIDCConfig(config kubeconfig.OIDCConfig, m map[string]string) {
+	setOrDeleteKey(m, "idp-issuer-url", config.IDPIssuerURL)
+	setOrDeleteKey(m, "client-id", config.ClientID)
+	setOrDeleteKey(m, "client-secret", config.ClientSecret)
+	setOrDeleteKey(m, "idp-certificate-authority", config.IDPCertificateAuthority)
+	setOrDeleteKey(m, "idp-certificate-authority-data", config.IDPCertificateAuthorityData)
+	extraScopes := strings.Join(config.ExtraScopes, ",")
+	setOrDeleteKey(m, "extra-scopes", extraScopes)
+	setOrDeleteKey(m, "id-token", config.IDToken)
+	setOrDeleteKey(m, "refresh-token", config.RefreshToken)
+}
+
+func setOrDeleteKey(m map[string]string, key, value string) {
+	if value == "" {
+		delete(m, key)
+		return
+	}
+	m[key] = value
+}

adaptors/kubeconfig/write_test.go

@@ -0,0 +1,138 @@
+package kubeconfig
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/int128/kubelogin/models/kubeconfig"
+)
+
+func TestKubeconfig_UpdateAuth(t *testing.T) {
+	var k Kubeconfig
+
+	t.Run("MinimumKeys", func(t *testing.T) {
+		f := newKubeconfigFile(t)
+		defer func() {
+			if err := os.Remove(f.Name()); err != nil {
+				t.Errorf("Could not remove the temp file: %s", err)
+			}
+		}()
+		if err := k.UpdateAuthProvider(&kubeconfig.AuthProvider{
+			LocationOfOrigin: f.Name(),
+			UserName:         "google",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+				ClientID:     "GOOGLE_CLIENT_ID",
+				ClientSecret: "GOOGLE_CLIENT_SECRET",
+				IDToken:      "YOUR_ID_TOKEN",
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			},
+		}); err != nil {
+			t.Fatalf("Could not update auth: %s", err)
+		}
+		b, err := ioutil.ReadFile(f.Name())
+		if err != nil {
+			t.Fatalf("Could not read kubeconfig: %s", err)
+		}
+
+		want := `apiVersion: v1
+clusters: []
+contexts: []
+current-context: ""
+kind: Config
+preferences: {}
+users:
+- name: google
+  user:
+    auth-provider:
+      config:
+        client-id: GOOGLE_CLIENT_ID
+        client-secret: GOOGLE_CLIENT_SECRET
+        id-token: YOUR_ID_TOKEN
+        idp-issuer-url: https://accounts.google.com
+        refresh-token: YOUR_REFRESH_TOKEN
+      name: oidc
+`
+		if want != string(b) {
+			t.Errorf("---- kubeconfig wants ----\n%s\n---- but ----\n%s", want, string(b))
+		}
+	})
+
+	t.Run("FullKeys", func(t *testing.T) {
+		f := newKubeconfigFile(t)
+		defer func() {
+			if err := os.Remove(f.Name()); err != nil {
+				t.Errorf("Could not remove the temp file: %s", err)
+			}
+		}()
+		if err := k.UpdateAuthProvider(&kubeconfig.AuthProvider{
+			LocationOfOrigin: f.Name(),
+			UserName:         "google",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL:                "https://accounts.google.com",
+				ClientID:                    "GOOGLE_CLIENT_ID",
+				ClientSecret:                "GOOGLE_CLIENT_SECRET",
+				IDPCertificateAuthority:     "/path/to/cert",
+				IDPCertificateAuthorityData: "BASE64",
+				ExtraScopes:                 []string{"email", "profile"},
+				IDToken:                     "YOUR_ID_TOKEN",
+				RefreshToken:                "YOUR_REFRESH_TOKEN",
+			},
+		}); err != nil {
+			t.Fatalf("Could not update auth: %s", err)
+		}
+		b, err := ioutil.ReadFile(f.Name())
+		if err != nil {
+			t.Fatalf("Could not read kubeconfig: %s", err)
+		}
+
+		want := `apiVersion: v1
+clusters: []
+contexts: []
+current-context: ""
+kind: Config
+preferences: {}
+users:
+- name: google
+  user:
+    auth-provider:
+      config:
+        client-id: GOOGLE_CLIENT_ID
+        client-secret: GOOGLE_CLIENT_SECRET
+        extra-scopes: email,profile
+        id-token: YOUR_ID_TOKEN
+        idp-certificate-authority: /path/to/cert
+        idp-certificate-authority-data: BASE64
+        idp-issuer-url: https://accounts.google.com
+        refresh-token: YOUR_REFRESH_TOKEN
+      name: oidc
+`
+		if want != string(b) {
+			t.Errorf("---- kubeconfig wants ----\n%s\n---- but ----\n%s", want, string(b))
+		}
+	})
+}
+
+func newKubeconfigFile(t *testing.T) *os.File {
+	content := `apiVersion: v1
+clusters: []
+kind: Config
+preferences: {}
+users:
+  - name: google
+    user:
+      auth-provider:
+        config:
+          idp-issuer-url: https://accounts.google.com
+        name: oidc`
+	f, err := ioutil.TempFile("", "kubeconfig")
+	if err != nil {
+		t.Fatalf("Could not create a file: %s", err)
+	}
+	defer f.Close()
+	if _, err := f.Write([]byte(content)); err != nil {
+		t.Fatalf("Could not write kubeconfig: %s", err)
+	}
+	return f
+}

adaptors/logger/logger.go

@@ -1,42 +1,49 @@
-package adaptors
+package logger
 
 import (
+	"fmt"
 	"log"
 	"os"
 
-	"github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
 )
 
-// NewLogger returns a Logger with the standard log.Logger for messages and debug.
-func NewLogger() adaptors.Logger {
+// Set provides an implementation and interface for Logger.
+var Set = wire.NewSet(
+	New,
+)
+
+// New returns a Logger with the standard log.Logger for messages and debug.
+func New() adaptors.Logger {
 	return &Logger{
 		stdLogger:   log.New(os.Stderr, "", 0),
-		debugLogger: log.New(os.Stderr, "", log.Ltime|log.Lmicroseconds),
+		debugLogger: log.New(os.Stderr, "", log.Ltime|log.Lmicroseconds|log.Lshortfile),
 	}
 }
 
-// NewLoggerWith returns a Logger with the given standard log.Logger.
-func NewLoggerWith(l stdLogger) *Logger {
-	return &Logger{
-		stdLogger:   l,
-		debugLogger: l,
-	}
+func NewWith(s stdLogger, d debugLogger) *Logger {
+	return &Logger{s, d, 0}
 }
 
 type stdLogger interface {
 	Printf(format string, v ...interface{})
 }
 
+type debugLogger interface {
+	Output(calldepth int, s string) error
+}
+
 // Logger wraps the standard log.Logger and just provides debug level.
 type Logger struct {
 	stdLogger
-	debugLogger stdLogger
-	level       adaptors.LogLevel
+	debugLogger
+	level adaptors.LogLevel
 }
 
 func (l *Logger) Debugf(level adaptors.LogLevel, format string, v ...interface{}) {
 	if l.IsEnabled(level) {
-		l.debugLogger.Printf(format, v...)
+		_ = l.debugLogger.Output(2, fmt.Sprintf(format, v...))
 	}
 }
 

adaptors/logger/logger_test.go

@@ -1,18 +1,19 @@
-package adaptors
+package logger
 
 import (
 	"fmt"
 	"testing"
 
-	"github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/int128/kubelogin/adaptors"
 )
 
-type mockStdLogger struct {
+type mockDebugLogger struct {
 	count int
 }
 
-func (l *mockStdLogger) Printf(format string, v ...interface{}) {
+func (l *mockDebugLogger) Output(int, string) error {
 	l.count++
+	return nil
 }
 
 func TestLogger_Debugf(t *testing.T) {
@@ -33,7 +34,7 @@ func TestLogger_Debugf(t *testing.T) {
 		{2, 3, 0},
 	} {
 		t.Run(fmt.Sprintf("%+v", c), func(t *testing.T) {
-			m := &mockStdLogger{}
+			m := &mockDebugLogger{}
 			l := &Logger{debugLogger: m, level: c.loggerLevel}
 			l.Debugf(c.debugfLevel, "hello")
 			if m.count != c.count {
@@ -43,6 +44,14 @@ func TestLogger_Debugf(t *testing.T) {
 	}
 }
 
+type mockStdLogger struct {
+	count int
+}
+
+func (l *mockStdLogger) Printf(format string, v ...interface{}) {
+	l.count++
+}
+
 func TestLogger_Printf(t *testing.T) {
 	m := &mockStdLogger{}
 	l := &Logger{stdLogger: m}

adaptors/mock_adaptors/logger.go

@@ -2,7 +2,7 @@ package mock_adaptors
 
 import (
 	"github.com/golang/mock/gomock"
-	"github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/int128/kubelogin/adaptors"
 )
 
 func NewLogger(t testingLogger, ctrl *gomock.Controller) *Logger {

adaptors/mock_adaptors/mock_adaptors.go

@@ -1,183 +1,147 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/int128/kubelogin/adaptors/interfaces (interfaces: KubeConfig,HTTP,HTTPClientConfig,OIDC,Logger)
+// Source: github.com/int128/kubelogin/adaptors (interfaces: Kubeconfig,TokenCacheRepository,CredentialPluginInteraction,OIDC,OIDCClient,Env,Logger)
 
 // Package mock_adaptors is a generated GoMock package.
 package mock_adaptors
 
 import (
 	context "context"
-	tls "crypto/tls"
-	go_oidc "github.com/coreos/go-oidc"
 	gomock "github.com/golang/mock/gomock"
-	interfaces "github.com/int128/kubelogin/adaptors/interfaces"
-	api "k8s.io/client-go/tools/clientcmd/api"
-	http "net/http"
+	adaptors "github.com/int128/kubelogin/adaptors"
+	credentialplugin "github.com/int128/kubelogin/models/credentialplugin"
+	kubeconfig "github.com/int128/kubelogin/models/kubeconfig"
 	reflect "reflect"
 )
 
-// MockKubeConfig is a mock of KubeConfig interface
-type MockKubeConfig struct {
+// MockKubeconfig is a mock of Kubeconfig interface
+type MockKubeconfig struct {
 	ctrl     *gomock.Controller
-	recorder *MockKubeConfigMockRecorder
+	recorder *MockKubeconfigMockRecorder
 }
 
-// MockKubeConfigMockRecorder is the mock recorder for MockKubeConfig
-type MockKubeConfigMockRecorder struct {
-	mock *MockKubeConfig
+// MockKubeconfigMockRecorder is the mock recorder for MockKubeconfig
+type MockKubeconfigMockRecorder struct {
+	mock *MockKubeconfig
 }
 
-// NewMockKubeConfig creates a new mock instance
-func NewMockKubeConfig(ctrl *gomock.Controller) *MockKubeConfig {
-	mock := &MockKubeConfig{ctrl: ctrl}
-	mock.recorder = &MockKubeConfigMockRecorder{mock}
+// NewMockKubeconfig creates a new mock instance
+func NewMockKubeconfig(ctrl *gomock.Controller) *MockKubeconfig {
+	mock := &MockKubeconfig{ctrl: ctrl}
+	mock.recorder = &MockKubeconfigMockRecorder{mock}
 	return mock
 }
 
 // EXPECT returns an object that allows the caller to indicate expected use
-func (m *MockKubeConfig) EXPECT() *MockKubeConfigMockRecorder {
+func (m *MockKubeconfig) EXPECT() *MockKubeconfigMockRecorder {
 	return m.recorder
 }
 
-// LoadFromFile mocks base method
-func (m *MockKubeConfig) LoadFromFile(arg0 string) (*api.Config, error) {
-	ret := m.ctrl.Call(m, "LoadFromFile", arg0)
-	ret0, _ := ret[0].(*api.Config)
+// GetCurrentAuthProvider mocks base method
+func (m *MockKubeconfig) GetCurrentAuthProvider(arg0 string, arg1 kubeconfig.ContextName, arg2 kubeconfig.UserName) (*kubeconfig.AuthProvider, error) {
+	ret := m.ctrl.Call(m, "GetCurrentAuthProvider", arg0, arg1, arg2)
+	ret0, _ := ret[0].(*kubeconfig.AuthProvider)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// LoadFromFile indicates an expected call of LoadFromFile
-func (mr *MockKubeConfigMockRecorder) LoadFromFile(arg0 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LoadFromFile", reflect.TypeOf((*MockKubeConfig)(nil).LoadFromFile), arg0)
+// GetCurrentAuthProvider indicates an expected call of GetCurrentAuthProvider
+func (mr *MockKubeconfigMockRecorder) GetCurrentAuthProvider(arg0, arg1, arg2 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetCurrentAuthProvider", reflect.TypeOf((*MockKubeconfig)(nil).GetCurrentAuthProvider), arg0, arg1, arg2)
 }
 
-// WriteToFile mocks base method
-func (m *MockKubeConfig) WriteToFile(arg0 *api.Config, arg1 string) error {
-	ret := m.ctrl.Call(m, "WriteToFile", arg0, arg1)
+// UpdateAuthProvider mocks base method
+func (m *MockKubeconfig) UpdateAuthProvider(arg0 *kubeconfig.AuthProvider) error {
+	ret := m.ctrl.Call(m, "UpdateAuthProvider", arg0)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
-// WriteToFile indicates an expected call of WriteToFile
-func (mr *MockKubeConfigMockRecorder) WriteToFile(arg0, arg1 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "WriteToFile", reflect.TypeOf((*MockKubeConfig)(nil).WriteToFile), arg0, arg1)
+// UpdateAuthProvider indicates an expected call of UpdateAuthProvider
+func (mr *MockKubeconfigMockRecorder) UpdateAuthProvider(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UpdateAuthProvider", reflect.TypeOf((*MockKubeconfig)(nil).UpdateAuthProvider), arg0)
 }
 
-// MockHTTP is a mock of HTTP interface
-type MockHTTP struct {
+// MockTokenCacheRepository is a mock of TokenCacheRepository interface
+type MockTokenCacheRepository struct {
 	ctrl     *gomock.Controller
-	recorder *MockHTTPMockRecorder
+	recorder *MockTokenCacheRepositoryMockRecorder
 }
 
-// MockHTTPMockRecorder is the mock recorder for MockHTTP
-type MockHTTPMockRecorder struct {
-	mock *MockHTTP
+// MockTokenCacheRepositoryMockRecorder is the mock recorder for MockTokenCacheRepository
+type MockTokenCacheRepositoryMockRecorder struct {
+	mock *MockTokenCacheRepository
 }
 
-// NewMockHTTP creates a new mock instance
-func NewMockHTTP(ctrl *gomock.Controller) *MockHTTP {
-	mock := &MockHTTP{ctrl: ctrl}
-	mock.recorder = &MockHTTPMockRecorder{mock}
+// NewMockTokenCacheRepository creates a new mock instance
+func NewMockTokenCacheRepository(ctrl *gomock.Controller) *MockTokenCacheRepository {
+	mock := &MockTokenCacheRepository{ctrl: ctrl}
+	mock.recorder = &MockTokenCacheRepositoryMockRecorder{mock}
 	return mock
 }
 
 // EXPECT returns an object that allows the caller to indicate expected use
-func (m *MockHTTP) EXPECT() *MockHTTPMockRecorder {
+func (m *MockTokenCacheRepository) EXPECT() *MockTokenCacheRepositoryMockRecorder {
 	return m.recorder
 }
 
-// NewClient mocks base method
-func (m *MockHTTP) NewClient(arg0 interfaces.HTTPClientConfig) (*http.Client, error) {
-	ret := m.ctrl.Call(m, "NewClient", arg0)
-	ret0, _ := ret[0].(*http.Client)
+// Read mocks base method
+func (m *MockTokenCacheRepository) Read(arg0 string) (*credentialplugin.TokenCache, error) {
+	ret := m.ctrl.Call(m, "Read", arg0)
+	ret0, _ := ret[0].(*credentialplugin.TokenCache)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// NewClient indicates an expected call of NewClient
-func (mr *MockHTTPMockRecorder) NewClient(arg0 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "NewClient", reflect.TypeOf((*MockHTTP)(nil).NewClient), arg0)
+// Read indicates an expected call of Read
+func (mr *MockTokenCacheRepositoryMockRecorder) Read(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Read", reflect.TypeOf((*MockTokenCacheRepository)(nil).Read), arg0)
 }
 
-// NewClientConfig mocks base method
-func (m *MockHTTP) NewClientConfig() interfaces.HTTPClientConfig {
-	ret := m.ctrl.Call(m, "NewClientConfig")
-	ret0, _ := ret[0].(interfaces.HTTPClientConfig)
+// Write mocks base method
+func (m *MockTokenCacheRepository) Write(arg0 string, arg1 credentialplugin.TokenCache) error {
+	ret := m.ctrl.Call(m, "Write", arg0, arg1)
+	ret0, _ := ret[0].(error)
 	return ret0
 }
 
-// NewClientConfig indicates an expected call of NewClientConfig
-func (mr *MockHTTPMockRecorder) NewClientConfig() *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "NewClientConfig", reflect.TypeOf((*MockHTTP)(nil).NewClientConfig))
+// Write indicates an expected call of Write
+func (mr *MockTokenCacheRepositoryMockRecorder) Write(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Write", reflect.TypeOf((*MockTokenCacheRepository)(nil).Write), arg0, arg1)
 }
 
-// MockHTTPClientConfig is a mock of HTTPClientConfig interface
-type MockHTTPClientConfig struct {
+// MockCredentialPluginInteraction is a mock of CredentialPluginInteraction interface
+type MockCredentialPluginInteraction struct {
 	ctrl     *gomock.Controller
-	recorder *MockHTTPClientConfigMockRecorder
+	recorder *MockCredentialPluginInteractionMockRecorder
 }
 
-// MockHTTPClientConfigMockRecorder is the mock recorder for MockHTTPClientConfig
-type MockHTTPClientConfigMockRecorder struct {
-	mock *MockHTTPClientConfig
+// MockCredentialPluginInteractionMockRecorder is the mock recorder for MockCredentialPluginInteraction
+type MockCredentialPluginInteractionMockRecorder struct {
+	mock *MockCredentialPluginInteraction
 }
 
-// NewMockHTTPClientConfig creates a new mock instance
-func NewMockHTTPClientConfig(ctrl *gomock.Controller) *MockHTTPClientConfig {
-	mock := &MockHTTPClientConfig{ctrl: ctrl}
-	mock.recorder = &MockHTTPClientConfigMockRecorder{mock}
+// NewMockCredentialPluginInteraction creates a new mock instance
+func NewMockCredentialPluginInteraction(ctrl *gomock.Controller) *MockCredentialPluginInteraction {
+	mock := &MockCredentialPluginInteraction{ctrl: ctrl}
+	mock.recorder = &MockCredentialPluginInteractionMockRecorder{mock}
 	return mock
 }
 
 // EXPECT returns an object that allows the caller to indicate expected use
-func (m *MockHTTPClientConfig) EXPECT() *MockHTTPClientConfigMockRecorder {
+func (m *MockCredentialPluginInteraction) EXPECT() *MockCredentialPluginInteractionMockRecorder {
 	return m.recorder
 }
 
-// AddCertificateFromFile mocks base method
-func (m *MockHTTPClientConfig) AddCertificateFromFile(arg0 string) error {
-	ret := m.ctrl.Call(m, "AddCertificateFromFile", arg0)
+// Write mocks base method
+func (m *MockCredentialPluginInteraction) Write(arg0 credentialplugin.Output) error {
+	ret := m.ctrl.Call(m, "Write", arg0)
 	ret0, _ := ret[0].(error)
 	return ret0
 }
 
-// AddCertificateFromFile indicates an expected call of AddCertificateFromFile
-func (mr *MockHTTPClientConfigMockRecorder) AddCertificateFromFile(arg0 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddCertificateFromFile", reflect.TypeOf((*MockHTTPClientConfig)(nil).AddCertificateFromFile), arg0)
-}
-
-// AddEncodedCertificate mocks base method
-func (m *MockHTTPClientConfig) AddEncodedCertificate(arg0 string) error {
-	ret := m.ctrl.Call(m, "AddEncodedCertificate", arg0)
-	ret0, _ := ret[0].(error)
-	return ret0
-}
-
-// AddEncodedCertificate indicates an expected call of AddEncodedCertificate
-func (mr *MockHTTPClientConfigMockRecorder) AddEncodedCertificate(arg0 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddEncodedCertificate", reflect.TypeOf((*MockHTTPClientConfig)(nil).AddEncodedCertificate), arg0)
-}
-
-// SetSkipTLSVerify mocks base method
-func (m *MockHTTPClientConfig) SetSkipTLSVerify(arg0 bool) {
-	m.ctrl.Call(m, "SetSkipTLSVerify", arg0)
-}
-
-// SetSkipTLSVerify indicates an expected call of SetSkipTLSVerify
-func (mr *MockHTTPClientConfigMockRecorder) SetSkipTLSVerify(arg0 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SetSkipTLSVerify", reflect.TypeOf((*MockHTTPClientConfig)(nil).SetSkipTLSVerify), arg0)
-}
-
-// TLSConfig mocks base method
-func (m *MockHTTPClientConfig) TLSConfig() *tls.Config {
-	ret := m.ctrl.Call(m, "TLSConfig")
-	ret0, _ := ret[0].(*tls.Config)
-	return ret0
-}
-
-// TLSConfig indicates an expected call of TLSConfig
-func (mr *MockHTTPClientConfigMockRecorder) TLSConfig() *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "TLSConfig", reflect.TypeOf((*MockHTTPClientConfig)(nil).TLSConfig))
+// Write indicates an expected call of Write
+func (mr *MockCredentialPluginInteractionMockRecorder) Write(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Write", reflect.TypeOf((*MockCredentialPluginInteraction)(nil).Write), arg0)
 }
 
 // MockOIDC is a mock of OIDC interface
@@ -203,30 +167,128 @@ func (m *MockOIDC) EXPECT() *MockOIDCMockRecorder {
 	return m.recorder
 }
 
-// Authenticate mocks base method
-func (m *MockOIDC) Authenticate(arg0 context.Context, arg1 interfaces.OIDCAuthenticateIn, arg2 interfaces.OIDCAuthenticateCallback) (*interfaces.OIDCAuthenticateOut, error) {
-	ret := m.ctrl.Call(m, "Authenticate", arg0, arg1, arg2)
-	ret0, _ := ret[0].(*interfaces.OIDCAuthenticateOut)
+// New mocks base method
+func (m *MockOIDC) New(arg0 context.Context, arg1 adaptors.OIDCClientConfig) (adaptors.OIDCClient, error) {
+	ret := m.ctrl.Call(m, "New", arg0, arg1)
+	ret0, _ := ret[0].(adaptors.OIDCClient)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// Authenticate indicates an expected call of Authenticate
-func (mr *MockOIDCMockRecorder) Authenticate(arg0, arg1, arg2 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Authenticate", reflect.TypeOf((*MockOIDC)(nil).Authenticate), arg0, arg1, arg2)
+// New indicates an expected call of New
+func (mr *MockOIDCMockRecorder) New(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "New", reflect.TypeOf((*MockOIDC)(nil).New), arg0, arg1)
 }
 
-// VerifyIDToken mocks base method
-func (m *MockOIDC) VerifyIDToken(arg0 context.Context, arg1 interfaces.OIDCVerifyTokenIn) (*go_oidc.IDToken, error) {
-	ret := m.ctrl.Call(m, "VerifyIDToken", arg0, arg1)
-	ret0, _ := ret[0].(*go_oidc.IDToken)
+// MockOIDCClient is a mock of OIDCClient interface
+type MockOIDCClient struct {
+	ctrl     *gomock.Controller
+	recorder *MockOIDCClientMockRecorder
+}
+
+// MockOIDCClientMockRecorder is the mock recorder for MockOIDCClient
+type MockOIDCClientMockRecorder struct {
+	mock *MockOIDCClient
+}
+
+// NewMockOIDCClient creates a new mock instance
+func NewMockOIDCClient(ctrl *gomock.Controller) *MockOIDCClient {
+	mock := &MockOIDCClient{ctrl: ctrl}
+	mock.recorder = &MockOIDCClientMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockOIDCClient) EXPECT() *MockOIDCClientMockRecorder {
+	return m.recorder
+}
+
+// AuthenticateByCode mocks base method
+func (m *MockOIDCClient) AuthenticateByCode(arg0 context.Context, arg1 adaptors.OIDCAuthenticateByCodeIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ret := m.ctrl.Call(m, "AuthenticateByCode", arg0, arg1)
+	ret0, _ := ret[0].(*adaptors.OIDCAuthenticateOut)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// VerifyIDToken indicates an expected call of VerifyIDToken
-func (mr *MockOIDCMockRecorder) VerifyIDToken(arg0, arg1 interface{}) *gomock.Call {
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "VerifyIDToken", reflect.TypeOf((*MockOIDC)(nil).VerifyIDToken), arg0, arg1)
+// AuthenticateByCode indicates an expected call of AuthenticateByCode
+func (mr *MockOIDCClientMockRecorder) AuthenticateByCode(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthenticateByCode", reflect.TypeOf((*MockOIDCClient)(nil).AuthenticateByCode), arg0, arg1)
+}
+
+// AuthenticateByPassword mocks base method
+func (m *MockOIDCClient) AuthenticateByPassword(arg0 context.Context, arg1 adaptors.OIDCAuthenticateByPasswordIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ret := m.ctrl.Call(m, "AuthenticateByPassword", arg0, arg1)
+	ret0, _ := ret[0].(*adaptors.OIDCAuthenticateOut)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// AuthenticateByPassword indicates an expected call of AuthenticateByPassword
+func (mr *MockOIDCClientMockRecorder) AuthenticateByPassword(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthenticateByPassword", reflect.TypeOf((*MockOIDCClient)(nil).AuthenticateByPassword), arg0, arg1)
+}
+
+// Refresh mocks base method
+func (m *MockOIDCClient) Refresh(arg0 context.Context, arg1 adaptors.OIDCRefreshIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ret := m.ctrl.Call(m, "Refresh", arg0, arg1)
+	ret0, _ := ret[0].(*adaptors.OIDCAuthenticateOut)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Refresh indicates an expected call of Refresh
+func (mr *MockOIDCClientMockRecorder) Refresh(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Refresh", reflect.TypeOf((*MockOIDCClient)(nil).Refresh), arg0, arg1)
+}
+
+// Verify mocks base method
+func (m *MockOIDCClient) Verify(arg0 context.Context, arg1 adaptors.OIDCVerifyIn) (*adaptors.OIDCVerifyOut, error) {
+	ret := m.ctrl.Call(m, "Verify", arg0, arg1)
+	ret0, _ := ret[0].(*adaptors.OIDCVerifyOut)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Verify indicates an expected call of Verify
+func (mr *MockOIDCClientMockRecorder) Verify(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Verify", reflect.TypeOf((*MockOIDCClient)(nil).Verify), arg0, arg1)
+}
+
+// MockEnv is a mock of Env interface
+type MockEnv struct {
+	ctrl     *gomock.Controller
+	recorder *MockEnvMockRecorder
+}
+
+// MockEnvMockRecorder is the mock recorder for MockEnv
+type MockEnvMockRecorder struct {
+	mock *MockEnv
+}
+
+// NewMockEnv creates a new mock instance
+func NewMockEnv(ctrl *gomock.Controller) *MockEnv {
+	mock := &MockEnv{ctrl: ctrl}
+	mock.recorder = &MockEnvMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockEnv) EXPECT() *MockEnvMockRecorder {
+	return m.recorder
+}
+
+// ReadPassword mocks base method
+func (m *MockEnv) ReadPassword(arg0 string) (string, error) {
+	ret := m.ctrl.Call(m, "ReadPassword", arg0)
+	ret0, _ := ret[0].(string)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// ReadPassword indicates an expected call of ReadPassword
+func (mr *MockEnvMockRecorder) ReadPassword(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ReadPassword", reflect.TypeOf((*MockEnv)(nil).ReadPassword), arg0)
 }
 
 // MockLogger is a mock of Logger interface
@@ -253,7 +315,7 @@ func (m *MockLogger) EXPECT() *MockLoggerMockRecorder {
 }
 
 // Debugf mocks base method
-func (m *MockLogger) Debugf(arg0 interfaces.LogLevel, arg1 string, arg2 ...interface{}) {
+func (m *MockLogger) Debugf(arg0 adaptors.LogLevel, arg1 string, arg2 ...interface{}) {
 	varargs := []interface{}{arg0, arg1}
 	for _, a := range arg2 {
 		varargs = append(varargs, a)
@@ -268,7 +330,7 @@ func (mr *MockLoggerMockRecorder) Debugf(arg0, arg1 interface{}, arg2 ...interfa
 }
 
 // IsEnabled mocks base method
-func (m *MockLogger) IsEnabled(arg0 interfaces.LogLevel) bool {
+func (m *MockLogger) IsEnabled(arg0 adaptors.LogLevel) bool {
 	ret := m.ctrl.Call(m, "IsEnabled", arg0)
 	ret0, _ := ret[0].(bool)
 	return ret0
@@ -295,7 +357,7 @@ func (mr *MockLoggerMockRecorder) Printf(arg0 interface{}, arg1 ...interface{})
 }
 
 // SetLevel mocks base method
-func (m *MockLogger) SetLevel(arg0 interfaces.LogLevel) {
+func (m *MockLogger) SetLevel(arg0 adaptors.LogLevel) {
 	m.ctrl.Call(m, "SetLevel", arg0)
 }
 

adaptors/oidc.go

@@ -1,73 +0,0 @@
-package adaptors
-
-import (
-	"context"
-
-	"github.com/coreos/go-oidc"
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/oauth2cli"
-	"github.com/pkg/errors"
-	"golang.org/x/oauth2"
-)
-
-func NewOIDC() adaptors.OIDC {
-	return &OIDC{}
-}
-
-type OIDC struct{}
-
-func (*OIDC) Authenticate(ctx context.Context, in adaptors.OIDCAuthenticateIn, cb adaptors.OIDCAuthenticateCallback) (*adaptors.OIDCAuthenticateOut, error) {
-	if in.Client != nil {
-		ctx = context.WithValue(ctx, oauth2.HTTPClient, in.Client)
-	}
-	provider, err := oidc.NewProvider(ctx, in.Issuer)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not discovery the OIDC issuer")
-	}
-	flow := oauth2cli.AuthCodeFlow{
-		Config: oauth2.Config{
-			Endpoint:     provider.Endpoint(),
-			ClientID:     in.ClientID,
-			ClientSecret: in.ClientSecret,
-			Scopes:       append(in.ExtraScopes, oidc.ScopeOpenID),
-		},
-		LocalServerPort:    in.LocalServerPort,
-		SkipOpenBrowser:    in.SkipOpenBrowser,
-		AuthCodeOptions:    []oauth2.AuthCodeOption{oauth2.AccessTypeOffline},
-		ShowLocalServerURL: cb.ShowLocalServerURL,
-	}
-	token, err := flow.GetToken(ctx)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not get a token")
-	}
-	idToken, ok := token.Extra("id_token").(string)
-	if !ok {
-		return nil, errors.Errorf("id_token is missing in the token response: %s", token)
-	}
-	verifier := provider.Verifier(&oidc.Config{ClientID: in.ClientID})
-	verifiedIDToken, err := verifier.Verify(ctx, idToken)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not verify the id_token")
-	}
-	return &adaptors.OIDCAuthenticateOut{
-		VerifiedIDToken: verifiedIDToken,
-		IDToken:         idToken,
-		RefreshToken:    token.RefreshToken,
-	}, nil
-}
-
-func (*OIDC) VerifyIDToken(ctx context.Context, in adaptors.OIDCVerifyTokenIn) (*oidc.IDToken, error) {
-	if in.Client != nil {
-		ctx = context.WithValue(ctx, oauth2.HTTPClient, in.Client)
-	}
-	provider, err := oidc.NewProvider(ctx, in.Issuer)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not discovery the OIDC issuer")
-	}
-	verifier := provider.Verifier(&oidc.Config{ClientID: in.ClientID})
-	verifiedIDToken, err := verifier.Verify(ctx, in.IDToken)
-	if err != nil {
-		return nil, errors.Wrapf(err, "could not verify the id_token")
-	}
-	return verifiedIDToken, nil
-}

adaptors/oidc/logging/transport.go

@@ -1,10 +1,10 @@
-package infrastructure
+package logging
 
 import (
 	"net/http"
 	"net/http/httputil"
 
-	"github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/int128/kubelogin/adaptors"
 )
 
 const (
@@ -12,12 +12,12 @@ const (
 	logLevelDumpBody    = 3
 )
 
-type LoggingTransport struct {
+type Transport struct {
 	Base   http.RoundTripper
 	Logger adaptors.Logger
 }
 
-func (t *LoggingTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) {
 	if !t.IsDumpEnabled() {
 		return t.Base.RoundTrip(req)
 	}
@@ -41,10 +41,10 @@ func (t *LoggingTransport) RoundTrip(req *http.Request) (*http.Response, error)
 	return resp, err
 }
 
-func (t *LoggingTransport) IsDumpEnabled() bool {
+func (t *Transport) IsDumpEnabled() bool {
 	return t.Logger.IsEnabled(logLevelDumpHeaders)
 }
 
-func (t *LoggingTransport) IsDumpBodyEnabled() bool {
+func (t *Transport) IsDumpBodyEnabled() bool {
 	return t.Logger.IsEnabled(logLevelDumpBody)
 }

adaptors/oidc/logging/transport_test.go

@@ -1,4 +1,4 @@
-package infrastructure
+package logging
 
 import (
 	"bufio"
@@ -8,7 +8,7 @@ import (
 	"testing"
 
 	"github.com/golang/mock/gomock"
-	"github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/int128/kubelogin/adaptors"
 	"github.com/int128/kubelogin/adaptors/mock_adaptors"
 )
 
@@ -42,7 +42,7 @@ dummy`)), req)
 	}
 	defer resp.Body.Close()
 
-	transport := &LoggingTransport{
+	transport := &Transport{
 		Base:   &mockTransport{resp: resp},
 		Logger: logger,
 	}
@@ -64,7 +64,7 @@ func TestLoggingTransport_IsDumpEnabled(t *testing.T) {
 		IsEnabled(adaptors.LogLevel(logLevelDumpHeaders)).
 		Return(true)
 
-	transport := &LoggingTransport{
+	transport := &Transport{
 		Logger: logger,
 	}
 	if transport.IsDumpEnabled() != true {
@@ -81,7 +81,7 @@ func TestLoggingTransport_IsDumpBodyEnabled(t *testing.T) {
 		IsEnabled(adaptors.LogLevel(logLevelDumpBody)).
 		Return(true)
 
-	transport := &LoggingTransport{
+	transport := &Transport{
 		Logger: logger,
 	}
 	if transport.IsDumpBodyEnabled() != true {

adaptors/oidc/oidc.go

@@ -0,0 +1,239 @@
+package oidc
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/coreos/go-oidc"
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/oidc/logging"
+	"github.com/int128/kubelogin/adaptors/oidc/tls"
+	"github.com/int128/oauth2cli"
+	"github.com/pkg/browser"
+	"golang.org/x/oauth2"
+	"golang.org/x/xerrors"
+)
+
+func init() {
+	// In credential plugin mode, some browser launcher writes a message to stdout
+	// and it may break the credential json for client-go.
+	// This prevents the browser launcher from breaking the credential json.
+	browser.Stdout = os.Stderr
+}
+
+// Set provides an implementation and interface for OIDC.
+var Set = wire.NewSet(
+	wire.Struct(new(Factory), "*"),
+	wire.Bind(new(adaptors.OIDC), new(*Factory)),
+)
+
+type Factory struct {
+	Logger adaptors.Logger
+}
+
+// New returns an instance of adaptors.OIDCClient with the given configuration.
+func (f *Factory) New(ctx context.Context, config adaptors.OIDCClientConfig) (adaptors.OIDCClient, error) {
+	tlsConfig, err := tls.NewConfig(config, f.Logger)
+	if err != nil {
+		return nil, xerrors.Errorf("could not initialize TLS config: %w", err)
+	}
+	baseTransport := &http.Transport{
+		TLSClientConfig: tlsConfig,
+		Proxy:           http.ProxyFromEnvironment,
+	}
+	loggingTransport := &logging.Transport{
+		Base:   baseTransport,
+		Logger: f.Logger,
+	}
+	httpClient := &http.Client{
+		Transport: loggingTransport,
+	}
+
+	ctx = context.WithValue(ctx, oauth2.HTTPClient, httpClient)
+	provider, err := oidc.NewProvider(ctx, config.Config.IDPIssuerURL)
+	if err != nil {
+		return nil, xerrors.Errorf("could not discovery the OIDC issuer: %w", err)
+	}
+	return &client{
+		httpClient: httpClient,
+		provider:   provider,
+		oauth2Config: oauth2.Config{
+			Endpoint:     provider.Endpoint(),
+			ClientID:     config.Config.ClientID,
+			ClientSecret: config.Config.ClientSecret,
+			Scopes:       append(config.Config.ExtraScopes, oidc.ScopeOpenID),
+		},
+		logger: f.Logger,
+	}, nil
+}
+
+type client struct {
+	httpClient   *http.Client
+	provider     *oidc.Provider
+	oauth2Config oauth2.Config
+	logger       adaptors.Logger
+}
+
+func (c *client) wrapContext(ctx context.Context) context.Context {
+	if c.httpClient != nil {
+		ctx = context.WithValue(ctx, oauth2.HTTPClient, c.httpClient)
+	}
+	return ctx
+}
+
+// AuthenticateByCode performs the authorization code flow.
+func (c *client) AuthenticateByCode(ctx context.Context, in adaptors.OIDCAuthenticateByCodeIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ctx = c.wrapContext(ctx)
+	nonce, err := newNonce()
+	if err != nil {
+		return nil, xerrors.Errorf("could not generate a nonce parameter")
+	}
+	config := oauth2cli.Config{
+		OAuth2Config:       c.oauth2Config,
+		LocalServerPort:    in.LocalServerPort,
+		SkipOpenBrowser:    in.SkipOpenBrowser,
+		AuthCodeOptions:    []oauth2.AuthCodeOption{oauth2.AccessTypeOffline, oidc.Nonce(nonce)},
+		ShowLocalServerURL: in.ShowLocalServerURL.ShowLocalServerURL,
+	}
+	token, err := oauth2cli.GetToken(ctx, config)
+	if err != nil {
+		return nil, xerrors.Errorf("could not get a token: %w", err)
+	}
+	idToken, ok := token.Extra("id_token").(string)
+	if !ok {
+		return nil, xerrors.Errorf("id_token is missing in the token response: %s", token)
+	}
+	verifier := c.provider.Verifier(&oidc.Config{ClientID: c.oauth2Config.ClientID})
+	verifiedIDToken, err := verifier.Verify(ctx, idToken)
+	if err != nil {
+		return nil, xerrors.Errorf("could not verify the id_token: %w", err)
+	}
+	if verifiedIDToken.Nonce != nonce {
+		return nil, xerrors.Errorf("nonce of ID token did not match (want %s but was %s)", nonce, verifiedIDToken.Nonce)
+	}
+	claims, err := dumpClaims(verifiedIDToken)
+	if err != nil {
+		c.logger.Debugf(1, "incomplete claims of the ID token: %w", err)
+	}
+	return &adaptors.OIDCAuthenticateOut{
+		IDToken:       idToken,
+		RefreshToken:  token.RefreshToken,
+		IDTokenExpiry: verifiedIDToken.Expiry,
+		IDTokenClaims: claims,
+	}, nil
+}
+
+func newNonce() (string, error) {
+	var n uint64
+	if err := binary.Read(rand.Reader, binary.LittleEndian, &n); err != nil {
+		return "", xerrors.Errorf("error while reading random: %w", err)
+	}
+	return fmt.Sprintf("%x", n), nil
+}
+
+// AuthenticateByPassword performs the resource owner password credentials flow.
+func (c *client) AuthenticateByPassword(ctx context.Context, in adaptors.OIDCAuthenticateByPasswordIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ctx = c.wrapContext(ctx)
+	token, err := c.oauth2Config.PasswordCredentialsToken(ctx, in.Username, in.Password)
+	if err != nil {
+		return nil, xerrors.Errorf("could not get a token: %w", err)
+	}
+	idToken, ok := token.Extra("id_token").(string)
+	if !ok {
+		return nil, xerrors.Errorf("id_token is missing in the token response: %s", token)
+	}
+	verifier := c.provider.Verifier(&oidc.Config{ClientID: c.oauth2Config.ClientID})
+	verifiedIDToken, err := verifier.Verify(ctx, idToken)
+	if err != nil {
+		return nil, xerrors.Errorf("could not verify the id_token: %w", err)
+	}
+	claims, err := dumpClaims(verifiedIDToken)
+	if err != nil {
+		c.logger.Debugf(1, "incomplete claims of the ID token: %w", err)
+	}
+	return &adaptors.OIDCAuthenticateOut{
+		IDToken:       idToken,
+		RefreshToken:  token.RefreshToken,
+		IDTokenExpiry: verifiedIDToken.Expiry,
+		IDTokenClaims: claims,
+	}, nil
+}
+
+// Verify checks client ID and signature of the ID token.
+// This does not check the expiration and caller should check it.
+func (c *client) Verify(ctx context.Context, in adaptors.OIDCVerifyIn) (*adaptors.OIDCVerifyOut, error) {
+	ctx = c.wrapContext(ctx)
+	verifier := c.provider.Verifier(&oidc.Config{
+		ClientID:        c.oauth2Config.ClientID,
+		SkipExpiryCheck: true,
+	})
+	verifiedIDToken, err := verifier.Verify(ctx, in.IDToken)
+	if err != nil {
+		return nil, xerrors.Errorf("could not verify the id_token: %w", err)
+	}
+	claims, err := dumpClaims(verifiedIDToken)
+	if err != nil {
+		c.logger.Debugf(1, "incomplete claims of the ID token: %w", err)
+	}
+	return &adaptors.OIDCVerifyOut{
+		IDTokenExpiry: verifiedIDToken.Expiry,
+		IDTokenClaims: claims,
+	}, nil
+}
+
+// Refresh sends a refresh token request and returns a token set.
+func (c *client) Refresh(ctx context.Context, in adaptors.OIDCRefreshIn) (*adaptors.OIDCAuthenticateOut, error) {
+	ctx = c.wrapContext(ctx)
+	currentToken := &oauth2.Token{
+		Expiry:       time.Now(),
+		RefreshToken: in.RefreshToken,
+	}
+	source := c.oauth2Config.TokenSource(ctx, currentToken)
+	token, err := source.Token()
+	if err != nil {
+		return nil, xerrors.Errorf("could not refresh the token: %w", err)
+	}
+	idToken, ok := token.Extra("id_token").(string)
+	if !ok {
+		return nil, xerrors.Errorf("id_token is missing in the token response: %s", token)
+	}
+	verifier := c.provider.Verifier(&oidc.Config{ClientID: c.oauth2Config.ClientID})
+	verifiedIDToken, err := verifier.Verify(ctx, idToken)
+	if err != nil {
+		return nil, xerrors.Errorf("could not verify the id_token: %w", err)
+	}
+	claims, err := dumpClaims(verifiedIDToken)
+	if err != nil {
+		c.logger.Debugf(1, "incomplete claims of the ID token: %w", err)
+	}
+	return &adaptors.OIDCAuthenticateOut{
+		IDToken:       idToken,
+		RefreshToken:  token.RefreshToken,
+		IDTokenExpiry: verifiedIDToken.Expiry,
+		IDTokenClaims: claims,
+	}, nil
+}
+
+func dumpClaims(token *oidc.IDToken) (map[string]string, error) {
+	var rawClaims map[string]interface{}
+	err := token.Claims(&rawClaims)
+	claims := make(map[string]string)
+	for k, v := range rawClaims {
+		switch v.(type) {
+		case float64:
+			claims[k] = fmt.Sprintf("%f", v.(float64))
+		default:
+			claims[k] = fmt.Sprintf("%s", v)
+		}
+	}
+	if err != nil {
+		return claims, xerrors.Errorf("error while decoding the ID token: %w", err)
+	}
+	return claims, nil
+}

adaptors/oidc/tls/testdata/Makefile

@@ -0,0 +1,29 @@
+.PHONY: clean
+
+all: ca1.crt ca1.crt.base64 ca2.crt ca2.crt.base64 ca3.crt ca3.crt.base64
+
+clean:
+	rm -v *.key *.csr *.crt *.base64
+
+%.key:
+	openssl genrsa -out $@ 1024
+
+%.csr: %.key
+	openssl req \
+		-new \
+		-key $< \
+		-subj "/CN=Hello" \
+		-days 3650 \
+		-out $@
+	openssl req -noout -text -in $@
+
+%.crt: %.csr %.key
+	openssl x509 -req \
+		-signkey $*.key \
+		-in $*.csr \
+		-days 3650 \
+		-out $@
+	openssl x509 -text -in $@
+
+%.crt.base64: %.crt
+	base64 -i $< -o $@

adaptors/oidc/tls/testdata/ca1.crt

@@ -0,0 +1,11 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

adaptors/oidc/tls/testdata/ca1.crt.base64

@@ -0,0 +1 @@
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

adaptors/oidc/tls/testdata/ca2.crt

@@ -0,0 +1,11 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

adaptors/oidc/tls/testdata/ca2.crt.base64

@@ -0,0 +1 @@
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

adaptors/oidc/tls/testdata/ca3.crt

@@ -0,0 +1,11 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

adaptors/oidc/tls/testdata/ca3.crt.base64

@@ -0,0 +1 @@
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

adaptors/oidc/tls/tls.go

@@ -0,0 +1,66 @@
+package tls
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/base64"
+	"io/ioutil"
+
+	"github.com/int128/kubelogin/adaptors"
+	"golang.org/x/xerrors"
+)
+
+// NewConfig returns a tls.Config with the given certificates and options.
+func NewConfig(config adaptors.OIDCClientConfig, logger adaptors.Logger) (*tls.Config, error) {
+	pool := x509.NewCertPool()
+	if config.Config.IDPCertificateAuthority != "" {
+		logger.Debugf(1, "Loading the certificate %s", config.Config.IDPCertificateAuthority)
+		err := appendCertificateFromFile(pool, config.Config.IDPCertificateAuthority)
+		if err != nil {
+			return nil, xerrors.Errorf("could not load the certificate of idp-certificate-authority: %w", err)
+		}
+	}
+	if config.Config.IDPCertificateAuthorityData != "" {
+		logger.Debugf(1, "Loading the certificate of idp-certificate-authority-data")
+		err := appendEncodedCertificate(pool, config.Config.IDPCertificateAuthorityData)
+		if err != nil {
+			return nil, xerrors.Errorf("could not load the certificate of idp-certificate-authority-data: %w", err)
+		}
+	}
+	if config.CACertFilename != "" {
+		logger.Debugf(1, "Loading the certificate %s", config.CACertFilename)
+		err := appendCertificateFromFile(pool, config.CACertFilename)
+		if err != nil {
+			return nil, xerrors.Errorf("could not load the certificate: %w", err)
+		}
+	}
+	c := &tls.Config{
+		InsecureSkipVerify: config.SkipTLSVerify,
+	}
+	if len(pool.Subjects()) > 0 {
+		c.RootCAs = pool
+	}
+	return c, nil
+}
+
+func appendCertificateFromFile(pool *x509.CertPool, filename string) error {
+	b, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return xerrors.Errorf("could not read %s: %w", filename, err)
+	}
+	if !pool.AppendCertsFromPEM(b) {
+		return xerrors.Errorf("could not append certificate from %s", filename)
+	}
+	return nil
+}
+
+func appendEncodedCertificate(pool *x509.CertPool, base64String string) error {
+	b, err := base64.StdEncoding.DecodeString(base64String)
+	if err != nil {
+		return xerrors.Errorf("could not decode base64: %w", err)
+	}
+	if !pool.AppendCertsFromPEM(b) {
+		return xerrors.Errorf("could not append certificate")
+	}
+	return nil
+}

adaptors/oidc/tls/tls_test.go

@@ -0,0 +1,89 @@
+package tls
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/e2e_test/logger"
+	"github.com/int128/kubelogin/models/kubeconfig"
+)
+
+func TestNewConfig(t *testing.T) {
+	testingLogger := logger.New(t)
+	testingLogger.SetLevel(1)
+
+	t.Run("Defaults", func(t *testing.T) {
+		c, err := NewConfig(adaptors.OIDCClientConfig{}, testingLogger)
+		if err != nil {
+			t.Fatalf("NewConfig error: %+v", err)
+		}
+		if c.InsecureSkipVerify {
+			t.Errorf("InsecureSkipVerify wants false but true")
+		}
+		if c.RootCAs != nil {
+			t.Errorf("RootCAs wants nil but %+v", c.RootCAs)
+		}
+	})
+	t.Run("SkipTLSVerify", func(t *testing.T) {
+		config := adaptors.OIDCClientConfig{
+			SkipTLSVerify: true,
+		}
+		c, err := NewConfig(config, testingLogger)
+		if err != nil {
+			t.Fatalf("NewConfig error: %+v", err)
+		}
+		if !c.InsecureSkipVerify {
+			t.Errorf("InsecureSkipVerify wants true but false")
+		}
+		if c.RootCAs != nil {
+			t.Errorf("RootCAs wants nil but %+v", c.RootCAs)
+		}
+	})
+	t.Run("AllCertificates", func(t *testing.T) {
+		config := adaptors.OIDCClientConfig{
+			Config: kubeconfig.OIDCConfig{
+				IDPCertificateAuthority:     "testdata/ca1.crt",
+				IDPCertificateAuthorityData: string(readFile(t, "testdata/ca2.crt.base64")),
+			},
+			CACertFilename: "testdata/ca3.crt",
+		}
+		c, err := NewConfig(config, testingLogger)
+		if err != nil {
+			t.Fatalf("NewConfig error: %+v", err)
+		}
+		if c.InsecureSkipVerify {
+			t.Errorf("InsecureSkipVerify wants false but true")
+		}
+		if c.RootCAs == nil {
+			t.Fatalf("RootCAs wants non-nil but nil")
+		}
+		subjects := c.RootCAs.Subjects()
+		if len(subjects) != 3 {
+			t.Errorf("len(subjects) wants 3 but %d", len(subjects))
+		}
+	})
+	t.Run("InvalidCertificate", func(t *testing.T) {
+		config := adaptors.OIDCClientConfig{
+			Config: kubeconfig.OIDCConfig{
+				IDPCertificateAuthority:     "testdata/ca1.crt",
+				IDPCertificateAuthorityData: string(readFile(t, "testdata/ca2.crt.base64")),
+			},
+			CACertFilename: "testdata/Makefile", // invalid cert
+		}
+		_, err := NewConfig(config, testingLogger)
+		if err == nil {
+			t.Fatalf("NewConfig wants non-nil but nil")
+		}
+		t.Logf("expected error: %+v", err)
+	})
+}
+
+func readFile(t *testing.T, filename string) []byte {
+	t.Helper()
+	b, err := ioutil.ReadFile(filename)
+	if err != nil {
+		t.Fatalf("ReadFile error: %s", err)
+	}
+	return b
+}

adaptors/tokencache/tokencache.go

@@ -0,0 +1,46 @@
+package tokencache
+
+import (
+	"encoding/json"
+	"os"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"golang.org/x/xerrors"
+)
+
+// Set provides an implementation and interface for Kubeconfig.
+var Set = wire.NewSet(
+	wire.Struct(new(Repository), "*"),
+	wire.Bind(new(adaptors.TokenCacheRepository), new(*Repository)),
+)
+
+type Repository struct{}
+
+func (*Repository) Read(filename string) (*credentialplugin.TokenCache, error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return nil, xerrors.Errorf("could not open file %s: %w", filename, err)
+	}
+	defer f.Close()
+	d := json.NewDecoder(f)
+	var c credentialplugin.TokenCache
+	if err := d.Decode(&c); err != nil {
+		return nil, xerrors.Errorf("could not decode json file %s: %w", filename, err)
+	}
+	return &c, nil
+}
+
+func (*Repository) Write(filename string, tc credentialplugin.TokenCache) error {
+	f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return xerrors.Errorf("could not create file %s: %w", filename, err)
+	}
+	defer f.Close()
+	e := json.NewEncoder(f)
+	if err := e.Encode(&tc); err != nil {
+		return xerrors.Errorf("could not encode json to file %s: %w", filename, err)
+	}
+	return nil
+}

adaptors/tokencache/tokencache_test.go

@@ -0,0 +1,73 @@
+package tokencache
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/go-test/deep"
+	"github.com/int128/kubelogin/models/credentialplugin"
+)
+
+func TestRepository_Read(t *testing.T) {
+	var r Repository
+
+	t.Run("Success", func(t *testing.T) {
+		dir, err := ioutil.TempDir("", "kube")
+		if err != nil {
+			t.Fatalf("could not create a temp dir: %s", err)
+		}
+		defer func() {
+			if err := os.RemoveAll(dir); err != nil {
+				t.Errorf("could not clean up the temp dir: %s", err)
+			}
+		}()
+		json := `{"id_token":"YOUR_ID_TOKEN","refresh_token":"YOUR_REFRESH_TOKEN"}`
+		filename := filepath.Join(dir, "token-cache")
+		if err := ioutil.WriteFile(filename, []byte(json), 0600); err != nil {
+			t.Fatalf("could not write to the temp file: %s", err)
+		}
+
+		tokenCache, err := r.Read(filename)
+		if err != nil {
+			t.Errorf("err wants nil but %+v", err)
+		}
+		want := &credentialplugin.TokenCache{IDToken: "YOUR_ID_TOKEN", RefreshToken: "YOUR_REFRESH_TOKEN"}
+		if diff := deep.Equal(tokenCache, want); diff != nil {
+			t.Error(diff)
+		}
+	})
+}
+
+func TestRepository_Write(t *testing.T) {
+	var r Repository
+
+	t.Run("Success", func(t *testing.T) {
+		dir, err := ioutil.TempDir("", "kube")
+		if err != nil {
+			t.Fatalf("could not create a temp dir: %s", err)
+		}
+		defer func() {
+			if err := os.RemoveAll(dir); err != nil {
+				t.Errorf("could not clean up the temp dir: %s", err)
+			}
+		}()
+
+		filename := filepath.Join(dir, "token-cache")
+		tokenCache := credentialplugin.TokenCache{IDToken: "YOUR_ID_TOKEN", RefreshToken: "YOUR_REFRESH_TOKEN"}
+		if err := r.Write(filename, tokenCache); err != nil {
+			t.Errorf("err wants nil but %+v", err)
+		}
+
+		b, err := ioutil.ReadFile(filename)
+		if err != nil {
+			t.Fatalf("could not read the token cache file: %s", err)
+		}
+		want := `{"id_token":"YOUR_ID_TOKEN","refresh_token":"YOUR_REFRESH_TOKEN"}
+`
+		if diff := deep.Equal(string(b), want); diff != nil {
+			t.Error(diff)
+		}
+	})
+}

adaptors_test/authserver/authserver.go

@@ -1,38 +0,0 @@
-package authserver
-
-import (
-	"crypto/rsa"
-	"net/http"
-	"testing"
-)
-
-// Config represents server configuration.
-type Config struct {
-	Issuer         string
-	Scope          string
-	TLSServerCert  string
-	TLSServerKey   string
-	IDToken        string
-	RefreshToken   string
-	IDTokenKeyPair *rsa.PrivateKey
-}
-
-// Start starts a HTTP server.
-func Start(t *testing.T, c Config) *http.Server {
-	s := &http.Server{
-		Addr:    "localhost:9000",
-		Handler: newHandler(t, c),
-	}
-	go func() {
-		var err error
-		if c.TLSServerCert != "" && c.TLSServerKey != "" {
-			err = s.ListenAndServeTLS(c.TLSServerCert, c.TLSServerKey)
-		} else {
-			err = s.ListenAndServe()
-		}
-		if err != nil && err != http.ErrServerClosed {
-			t.Error(err)
-		}
-	}()
-	return s
-}

adaptors_test/authserver/handler.go

@@ -1,108 +0,0 @@
-package authserver
-
-import (
-	"encoding/base64"
-	"fmt"
-	"math/big"
-	"net/http"
-	"testing"
-	"text/template"
-
-	"github.com/pkg/errors"
-)
-
-type handler struct {
-	t *testing.T
-
-	discovery *template.Template
-	token     *template.Template
-	jwks      *template.Template
-	authCode  string
-
-	// Template values
-	Issuer       string
-	Scope        string // Default to openid
-	IDToken      string
-	RefreshToken string
-	PrivateKey   struct{ N, E string }
-}
-
-func newHandler(t *testing.T, c Config) *handler {
-	tpl, err := template.ParseFiles(
-		"authserver/testdata/oidc-discovery.json",
-		"authserver/testdata/oidc-token.json",
-		"authserver/testdata/oidc-jwks.json",
-	)
-	if err != nil {
-		t.Fatalf("could not read the templates: %s", err)
-	}
-	h := handler{
-		t:            t,
-		discovery:    tpl.Lookup("oidc-discovery.json"),
-		token:        tpl.Lookup("oidc-token.json"),
-		jwks:         tpl.Lookup("oidc-jwks.json"),
-		authCode:     "3d24a8bd-35e6-457d-999e-e04bb1dfcec7",
-		Issuer:       c.Issuer,
-		Scope:        c.Scope,
-		IDToken:      c.IDToken,
-		RefreshToken: c.RefreshToken,
-	}
-	if h.Scope == "" {
-		h.Scope = "openid"
-	}
-	if c.IDTokenKeyPair != nil {
-		h.PrivateKey.E = base64.RawURLEncoding.EncodeToString(big.NewInt(int64(c.IDTokenKeyPair.E)).Bytes())
-		h.PrivateKey.N = base64.RawURLEncoding.EncodeToString(c.IDTokenKeyPair.N.Bytes())
-	}
-	return &h
-}
-
-func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	if err := h.serveHTTP(w, r); err != nil {
-		h.t.Logf("[auth-server] Error: %s", err)
-		w.WriteHeader(500)
-	}
-}
-
-func (h *handler) serveHTTP(w http.ResponseWriter, r *http.Request) error {
-	m := r.Method
-	p := r.URL.Path
-	h.t.Logf("[auth-server] %s %s", m, r.RequestURI)
-	switch {
-	case m == "GET" && p == "/.well-known/openid-configuration":
-		w.Header().Add("Content-Type", "application/json")
-		if err := h.discovery.Execute(w, h); err != nil {
-			return errors.Wrapf(err, "could not execute the template")
-		}
-	case m == "GET" && p == "/protocol/openid-connect/auth":
-		// Authentication Response
-		// http://openid.net/specs/openid-connect-core-1_0.html#AuthResponse
-		q := r.URL.Query()
-		if h.Scope != q.Get("scope") {
-			return errors.Errorf("scope wants %s but %s", h.Scope, q.Get("scope"))
-		}
-		to := fmt.Sprintf("%s?state=%s&code=%s", q.Get("redirect_uri"), q.Get("state"), h.authCode)
-		http.Redirect(w, r, to, 302)
-	case m == "POST" && p == "/protocol/openid-connect/token":
-		// Token Response
-		// http://openid.net/specs/openid-connect-core-1_0.html#TokenResponse
-		if err := r.ParseForm(); err != nil {
-			return errors.Wrapf(err, "could not parse the form")
-		}
-		if h.authCode != r.Form.Get("code") {
-			return errors.Errorf("code wants %s but %s", h.authCode, r.Form.Get("code"))
-		}
-		w.Header().Add("Content-Type", "application/json")
-		if err := h.token.Execute(w, h); err != nil {
-			return errors.Wrapf(err, "could not execute the template")
-		}
-	case m == "GET" && p == "/protocol/openid-connect/certs":
-		w.Header().Add("Content-Type", "application/json")
-		if err := h.jwks.Execute(w, h); err != nil {
-			return errors.Wrapf(err, "could not execute the template")
-		}
-	default:
-		http.Error(w, "Not Found", 404)
-	}
-	return nil
-}

adaptors_test/authserver/testdata/oidc-discovery.json

@@ -1,85 +0,0 @@
-{
-  "issuer": "{{ .Issuer }}",
-  "authorization_endpoint": "{{ .Issuer }}/protocol/openid-connect/auth",
-  "token_endpoint": "{{ .Issuer }}/protocol/openid-connect/token",
-  "token_introspection_endpoint": "{{ .Issuer }}/protocol/openid-connect/token/introspect",
-  "userinfo_endpoint": "{{ .Issuer }}/protocol/openid-connect/userinfo",
-  "end_session_endpoint": "{{ .Issuer }}/protocol/openid-connect/logout",
-  "jwks_uri": "{{ .Issuer }}/protocol/openid-connect/certs",
-  "check_session_iframe": "{{ .Issuer }}/protocol/openid-connect/login-status-iframe.html",
-  "grant_types_supported": [
-    "authorization_code",
-    "implicit",
-    "refresh_token",
-    "password",
-    "client_credentials"
-  ],
-  "response_types_supported": [
-    "code",
-    "none",
-    "id_token",
-    "token",
-    "id_token token",
-    "code id_token",
-    "code token",
-    "code id_token token"
-  ],
-  "subject_types_supported": [
-    "public",
-    "pairwise"
-  ],
-  "id_token_signing_alg_values_supported": [
-    "RS256"
-  ],
-  "userinfo_signing_alg_values_supported": [
-    "RS256"
-  ],
-  "request_object_signing_alg_values_supported": [
-    "none",
-    "RS256"
-  ],
-  "response_modes_supported": [
-    "query",
-    "fragment",
-    "form_post"
-  ],
-  "registration_endpoint": "{{ .Issuer }}/clients-registrations/openid-connect",
-  "token_endpoint_auth_methods_supported": [
-    "private_key_jwt",
-    "client_secret_basic",
-    "client_secret_post",
-    "client_secret_jwt"
-  ],
-  "token_endpoint_auth_signing_alg_values_supported": [
-    "RS256"
-  ],
-  "claims_supported": [
-    "sub",
-    "iss",
-    "auth_time",
-    "name",
-    "given_name",
-    "family_name",
-    "preferred_username",
-    "email"
-  ],
-  "claim_types_supported": [
-    "normal"
-  ],
-  "claims_parameter_supported": false,
-  "scopes_supported": [
-    "openid",
-    "offline_access",
-    "phone",
-    "address",
-    "email",
-    "profile"
-  ],
-  "request_parameter_supported": true,
-  "request_uri_parameter_supported": true,
-  "code_challenge_methods_supported": [
-    "plain",
-    "S256"
-  ],
-  "tls_client_certificate_bound_access_tokens": true
-}

adaptors_test/authserver/testdata/oidc-jwks.json

@@ -1,12 +0,0 @@
-{
-  "keys": [
-    {
-      "kty": "RSA",
-      "alg": "RS256",
-      "use": "sig",
-      "kid": "xxx",
-      "n": "{{ .PrivateKey.N }}",
-      "e": "{{ .PrivateKey.E }}"
-    }
-  ]
-}

adaptors_test/authserver/testdata/oidc-token.json

@@ -1,7 +0,0 @@
-{
-  "access_token": "7eaae8ab-8f69-45d9-ab7c-73560cd9444d",
-  "token_type": "Bearer",
-  "refresh_token": "{{ .RefreshToken }}",
-  "expires_in": 3600,
-  "id_token": "{{ .IDToken }}"
-}

adaptors_test/cmd_test.go

@@ -1,222 +0,0 @@
-package adaptors_test
-
-import (
-	"context"
-	"crypto/tls"
-	"net/http"
-	"os"
-	"testing"
-	"time"
-
-	"github.com/dgrijalva/jwt-go"
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/adaptors_test/authserver"
-	"github.com/int128/kubelogin/adaptors_test/keys"
-	"github.com/int128/kubelogin/adaptors_test/kubeconfig"
-	"github.com/int128/kubelogin/adaptors_test/logger"
-	"github.com/int128/kubelogin/di"
-)
-
-// Run the integration tests.
-//
-// 1. Start the auth server at port 9000.
-// 2. Run the Cmd.
-// 3. Open a request for port 8000.
-// 4. Wait for the Cmd.
-// 5. Shutdown the auth server.
-//
-func TestCmd_Run(t *testing.T) {
-	timeout := 1 * time.Second
-
-	t.Run("NoTLS", func(t *testing.T) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
-		defer cancel()
-
-		idToken := newIDToken(t, "http://localhost:9000")
-		serverConfig := authserver.Config{
-			Issuer:         "http://localhost:9000",
-			IDToken:        idToken,
-			IDTokenKeyPair: keys.JWSKeyPair,
-			RefreshToken:   "REFRESH_TOKEN",
-		}
-		server := authserver.Start(t, serverConfig)
-		defer server.Shutdown(ctx)
-
-		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
-			Issuer: "http://localhost:9000",
-		})
-		defer os.Remove(kubeConfigFilename)
-
-		startBrowserRequest(t, ctx, nil)
-		runCmd(t, ctx, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
-		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
-			IDToken:      idToken,
-			RefreshToken: "REFRESH_TOKEN",
-		})
-	})
-
-	t.Run("ExtraScopes", func(t *testing.T) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
-		defer cancel()
-
-		idToken := newIDToken(t, "http://localhost:9000")
-		serverConfig := authserver.Config{
-			Issuer:         "http://localhost:9000",
-			IDToken:        idToken,
-			IDTokenKeyPair: keys.JWSKeyPair,
-			RefreshToken:   "REFRESH_TOKEN",
-			Scope:          "profile groups openid",
-		}
-		server := authserver.Start(t, serverConfig)
-		defer server.Shutdown(ctx)
-
-		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
-			Issuer:      "http://localhost:9000",
-			ExtraScopes: "profile,groups",
-		})
-		defer os.Remove(kubeConfigFilename)
-
-		startBrowserRequest(t, ctx, nil)
-		runCmd(t, ctx, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
-		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
-			IDToken:      idToken,
-			RefreshToken: "REFRESH_TOKEN",
-		})
-	})
-
-	t.Run("CACert", func(t *testing.T) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
-		defer cancel()
-
-		idToken := newIDToken(t, "https://localhost:9000")
-		serverConfig := authserver.Config{
-			Issuer:         "https://localhost:9000",
-			IDToken:        idToken,
-			IDTokenKeyPair: keys.JWSKeyPair,
-			RefreshToken:   "REFRESH_TOKEN",
-			TLSServerCert:  keys.TLSServerCert,
-			TLSServerKey:   keys.TLSServerKey,
-		}
-		server := authserver.Start(t, serverConfig)
-		defer server.Shutdown(ctx)
-
-		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
-			Issuer:                  "https://localhost:9000",
-			IDPCertificateAuthority: keys.TLSCACert,
-		})
-		defer os.Remove(kubeConfigFilename)
-
-		startBrowserRequest(t, ctx, keys.TLSCACertAsConfig)
-		runCmd(t, ctx, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
-		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
-			IDToken:      idToken,
-			RefreshToken: "REFRESH_TOKEN",
-		})
-	})
-
-	t.Run("CACertData", func(t *testing.T) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
-		defer cancel()
-
-		idToken := newIDToken(t, "https://localhost:9000")
-		serverConfig := authserver.Config{
-			Issuer:         "https://localhost:9000",
-			IDToken:        idToken,
-			IDTokenKeyPair: keys.JWSKeyPair,
-			RefreshToken:   "REFRESH_TOKEN",
-			TLSServerCert:  keys.TLSServerCert,
-			TLSServerKey:   keys.TLSServerKey,
-		}
-		server := authserver.Start(t, serverConfig)
-		defer server.Shutdown(ctx)
-
-		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
-			Issuer:                      "https://localhost:9000",
-			IDPCertificateAuthorityData: keys.TLSCACertAsBase64,
-		})
-		defer os.Remove(kubeConfigFilename)
-
-		startBrowserRequest(t, ctx, keys.TLSCACertAsConfig)
-		runCmd(t, ctx, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
-		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
-			IDToken:      idToken,
-			RefreshToken: "REFRESH_TOKEN",
-		})
-	})
-
-	t.Run("AlreadyHaveValidToken", func(t *testing.T) {
-		ctx, cancel := context.WithTimeout(context.Background(), timeout)
-		defer cancel()
-
-		serverConfig := authserver.Config{
-			Issuer:         "http://localhost:9000",
-			IDTokenKeyPair: keys.JWSKeyPair,
-		}
-		server := authserver.Start(t, serverConfig)
-		defer server.Shutdown(ctx)
-
-		idToken := newIDToken(t, "http://localhost:9000")
-		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
-			Issuer:  "http://localhost:9000",
-			IDToken: idToken,
-		})
-		defer os.Remove(kubeConfigFilename)
-
-		runCmd(t, ctx, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
-		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
-			IDToken: idToken,
-		})
-	})
-}
-
-func newIDToken(t *testing.T, issuer string) string {
-	t.Helper()
-	token := jwt.NewWithClaims(jwt.SigningMethodRS256, jwt.StandardClaims{
-		Issuer:    issuer,
-		Audience:  "kubernetes",
-		ExpiresAt: time.Now().Add(time.Hour).Unix(),
-	})
-	s, err := token.SignedString(keys.JWSKeyPair)
-	if err != nil {
-		t.Fatalf("Could not sign the claims: %s", err)
-	}
-	return s
-}
-
-func runCmd(t *testing.T, ctx context.Context, args ...string) {
-	t.Helper()
-	newLogger := func() adaptors.Logger {
-		return logger.New(t)
-	}
-	if err := di.InvokeWithExtra(func(cmd adaptors.Cmd) {
-		exitCode := cmd.Run(ctx, append([]string{"kubelogin", "--v=1"}, args...), "HEAD")
-		if exitCode != 0 {
-			t.Errorf("exit status wants 0 but %d", exitCode)
-		}
-	}, newLogger); err != nil {
-		t.Errorf("Invoke returned error: %+v", err)
-	}
-}
-
-func startBrowserRequest(t *testing.T, ctx context.Context, tlsConfig *tls.Config) {
-	t.Helper()
-	client := http.Client{Transport: &http.Transport{TLSClientConfig: tlsConfig}}
-	req, err := http.NewRequest("GET", "http://localhost:8000/", nil)
-	if err != nil {
-		t.Errorf("could not create a request: %s", err)
-		return
-	}
-	req = req.WithContext(ctx)
-	go func() {
-		time.Sleep(50 * time.Millisecond)
-		resp, err := client.Do(req)
-		if err != nil {
-			t.Errorf("could not send a request: %s", err)
-			return
-		}
-		defer resp.Body.Close()
-		if resp.StatusCode != 200 {
-			t.Errorf("StatusCode wants 200 but %d", resp.StatusCode)
-		}
-	}()
-}

di/di.go

@@ -1,42 +1,57 @@
+//+build wireinject
+
 // Package di provides dependency injection.
 package di
 
 import (
+	"github.com/google/wire"
 	"github.com/int128/kubelogin/adaptors"
-	adaptorsInterfaces "github.com/int128/kubelogin/adaptors/interfaces"
+	"github.com/int128/kubelogin/adaptors/cmd"
+	credentialPluginAdaptor "github.com/int128/kubelogin/adaptors/credentialplugin"
+	"github.com/int128/kubelogin/adaptors/env"
+	"github.com/int128/kubelogin/adaptors/kubeconfig"
+	"github.com/int128/kubelogin/adaptors/logger"
+	"github.com/int128/kubelogin/adaptors/oidc"
+	"github.com/int128/kubelogin/adaptors/tokencache"
 	"github.com/int128/kubelogin/usecases"
-	"github.com/pkg/errors"
-	"go.uber.org/dig"
+	"github.com/int128/kubelogin/usecases/auth"
+	credentialPluginUseCase "github.com/int128/kubelogin/usecases/credentialplugin"
+	"github.com/int128/kubelogin/usecases/login"
 )
 
-var constructors = []interface{}{
-	usecases.NewLogin,
-
-	adaptors.NewCmd,
-	adaptors.NewKubeConfig,
-	adaptors.NewOIDC,
-	adaptors.NewHTTP,
-}
-
-var extraConstructors = []interface{}{
-	adaptors.NewLogger,
-}
-
-// Invoke runs the function with the default constructors.
-func Invoke(f func(cmd adaptorsInterfaces.Cmd)) error {
-	return InvokeWithExtra(f, extraConstructors...)
-}
-
-// InvokeWithExtra runs the function with the given constructors.
-func InvokeWithExtra(f func(cmd adaptorsInterfaces.Cmd), extra ...interface{}) error {
-	c := dig.New()
-	for _, constructor := range append(constructors, extra...) {
-		if err := c.Provide(constructor); err != nil {
-			return errors.Wrapf(err, "could not provide the constructor")
-		}
-	}
-	if err := c.Invoke(f); err != nil {
-		return errors.Wrapf(err, "could not invoke")
-	}
+// NewCmd returns an instance of adaptors.Cmd.
+func NewCmd() adaptors.Cmd {
+	wire.Build(
+		auth.Set,
+		auth.ExtraSet,
+		login.Set,
+		credentialPluginUseCase.Set,
+		cmd.Set,
+		env.Set,
+		kubeconfig.Set,
+		tokencache.Set,
+		credentialPluginAdaptor.Set,
+		oidc.Set,
+		logger.Set,
+	)
+	return nil
+}
+
+// NewCmdForHeadless returns an instance of adaptors.Cmd for headless testing.
+func NewCmdForHeadless(
+	adaptors.Logger,
+	usecases.LoginShowLocalServerURL,
+	adaptors.CredentialPluginInteraction,
+) adaptors.Cmd {
+	wire.Build(
+		auth.Set,
+		login.Set,
+		credentialPluginUseCase.Set,
+		cmd.Set,
+		env.Set,
+		kubeconfig.Set,
+		tokencache.Set,
+		oidc.Set,
+	)
 	return nil
 }

di/di_test.go

@@ -1,18 +0,0 @@
-package di_test
-
-import (
-	"testing"
-
-	adaptors "github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/di"
-)
-
-func TestInvoke(t *testing.T) {
-	if err := di.Invoke(func(cmd adaptors.Cmd) {
-		if cmd == nil {
-			t.Errorf("cmd wants non-nil but nil")
-		}
-	}); err != nil {
-		t.Fatalf("Invoke returned error: %+v", err)
-	}
-}

di/wire_gen.go

@@ -0,0 +1,92 @@
+// Code generated by Wire. DO NOT EDIT.
+
+//go:generate wire
+//+build !wireinject
+
+package di
+
+import (
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/cmd"
+	"github.com/int128/kubelogin/adaptors/credentialplugin"
+	"github.com/int128/kubelogin/adaptors/env"
+	"github.com/int128/kubelogin/adaptors/kubeconfig"
+	"github.com/int128/kubelogin/adaptors/logger"
+	"github.com/int128/kubelogin/adaptors/oidc"
+	"github.com/int128/kubelogin/adaptors/tokencache"
+	"github.com/int128/kubelogin/usecases"
+	"github.com/int128/kubelogin/usecases/auth"
+	credentialplugin2 "github.com/int128/kubelogin/usecases/credentialplugin"
+	"github.com/int128/kubelogin/usecases/login"
+)
+
+// Injectors from di.go:
+
+func NewCmd() adaptors.Cmd {
+	adaptorsLogger := logger.New()
+	factory := &oidc.Factory{
+		Logger: adaptorsLogger,
+	}
+	envEnv := &env.Env{}
+	showLocalServerURL := &auth.ShowLocalServerURL{
+		Logger: adaptorsLogger,
+	}
+	authentication := &auth.Authentication{
+		OIDC:               factory,
+		Env:                envEnv,
+		Logger:             adaptorsLogger,
+		ShowLocalServerURL: showLocalServerURL,
+	}
+	kubeconfigKubeconfig := &kubeconfig.Kubeconfig{}
+	loginLogin := &login.Login{
+		Authentication: authentication,
+		Kubeconfig:     kubeconfigKubeconfig,
+		Logger:         adaptorsLogger,
+	}
+	repository := &tokencache.Repository{}
+	interaction := &credentialplugin.Interaction{}
+	getToken := &credentialplugin2.GetToken{
+		Authentication:       authentication,
+		TokenCacheRepository: repository,
+		Interaction:          interaction,
+		Logger:               adaptorsLogger,
+	}
+	cmdCmd := &cmd.Cmd{
+		Login:    loginLogin,
+		GetToken: getToken,
+		Logger:   adaptorsLogger,
+	}
+	return cmdCmd
+}
+
+func NewCmdForHeadless(adaptorsLogger adaptors.Logger, loginShowLocalServerURL usecases.LoginShowLocalServerURL, credentialPluginInteraction adaptors.CredentialPluginInteraction) adaptors.Cmd {
+	factory := &oidc.Factory{
+		Logger: adaptorsLogger,
+	}
+	envEnv := &env.Env{}
+	authentication := &auth.Authentication{
+		OIDC:               factory,
+		Env:                envEnv,
+		Logger:             adaptorsLogger,
+		ShowLocalServerURL: loginShowLocalServerURL,
+	}
+	kubeconfigKubeconfig := &kubeconfig.Kubeconfig{}
+	loginLogin := &login.Login{
+		Authentication: authentication,
+		Kubeconfig:     kubeconfigKubeconfig,
+		Logger:         adaptorsLogger,
+	}
+	repository := &tokencache.Repository{}
+	getToken := &credentialplugin2.GetToken{
+		Authentication:       authentication,
+		TokenCacheRepository: repository,
+		Interaction:          credentialPluginInteraction,
+		Logger:               adaptorsLogger,
+	}
+	cmdCmd := &cmd.Cmd{
+		Login:    loginLogin,
+		GetToken: getToken,
+		Logger:   adaptorsLogger,
+	}
+	return cmdCmd
+}

docs/authn.seqdiag

@@ -0,0 +1,16 @@
+seqdiag {
+  User -> kubelogin [label = "execute"];
+  kubelogin -> Browser [label = "open"];
+  Browser -> Provider [label = "authentication request"];
+  Browser <-- Provider [label = "redirect"];
+  User -> Browser [label = "enter credentials"];
+  Browser -> Provider [label = "credentials"];
+  Browser <-- Provider [label = "authentication response"];
+  User <-- Browser [label = "success"];
+  kubelogin <-- Browser [label = "close"];
+  kubelogin -> Provider [label = "token request"];
+  kubelogin <-- Provider [label = "token response"];
+  kubelogin -> kubeconfig [label = "write token"];
+  kubelogin <-- kubeconfig;
+  User <-- kubelogin;
+}

docs/google.md

@@ -17,7 +17,10 @@ Open [Google APIs Console](https://console.developers.google.com/apis/credential
 
 Configure your Kubernetes API Server accepts [OpenID Connect Tokens](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#openid-connect-tokens).
 
-### kops
+```
+--oidc-issuer-url=https://accounts.google.com
+--oidc-client-id=YOUR_CLIENT_ID.apps.googleusercontent.com
+```
 
 If you are using [kops](https://github.com/kubernetes/kops), run `kops edit cluster` and append the following settings:
 
@@ -48,52 +51,33 @@ subjects:
 
 You can create a custom role and assign it as well.
 
-## 4. Setup kubectl
+## 4. Setup kubeconfig
 
-Configure `kubectl` for the OIDC authentication.
-
-```sh
-kubectl config set-credentials NAME \
-  --auth-provider oidc \
-  --auth-provider-arg idp-issuer-url=https://accounts.google.com \
-  --auth-provider-arg client-id=YOUR_CLIENT_ID.apps.googleusercontent.com \
-  --auth-provider-arg client-secret=YOUR_CLIENT_SECRET
-```
-
-## 5. Run kubelogin
-
-Run `kubelogin`.
-
-```
-% kubelogin
-2018/08/10 10:36:38 Reading .kubeconfig
-2018/08/10 10:36:38 Using current context: hello.k8s.local
-2018/08/10 10:36:41 Open http://localhost:8000 for authorization
-2018/08/10 10:36:45 GET /
-2018/08/10 10:37:07 GET /?state=...&session_state=...&code=ey...
-2018/08/10 10:37:08 Updated .kubeconfig
-```
-
-Now your `~/.kube/config` should be like:
+Configure the kubeconfig like:
 
 ```yaml
 users:
-- name: hello.k8s.local
+- name: google
   user:
-    auth-provider:
-      config:
-        idp-issuer-url: https://accounts.google.com
-        client-id: YOUR_CLIENT_ID.apps.googleusercontent.com
-        client-secret: YOUR_SECRET
-        id-token: ey...       # kubelogin will update ID token here
-        refresh-token: ey...  # kubelogin will update refresh token here
-      name: oidc
+    exec:
+      apiVersion: client.authentication.k8s.io/v1beta1
+      command: kubelogin
+      args:
+      - get-token
+      - --oidc-issuer-url=https://accounts.google.com
+      - --oidc-client-id=YOUR_CLIENT_ID.apps.googleusercontent.com
+      - --oidc-client-secret=YOUR_CLIENT_SECRET
 ```
 
+## 5. Run kubectl
+
 Make sure you can access to the Kubernetes cluster.
 
 ```
 % kubectl get nodes
+Open http://localhost:8000 for authentication
+You got a valid token until 2019-05-16 22:03:13 +0900 JST
+Updated ~/.kubeconfig
 NAME                                    STATUS    ROLES     AGE       VERSION
 ip-1-2-3-4.us-west-2.compute.internal   Ready     node      21d       v1.9.6
 ip-1-2-3-5.us-west-2.compute.internal   Ready     node      20d       v1.9.6

docs/keycloak.md

@@ -2,30 +2,43 @@
 
 ## Prerequisite
 
-- You have administrator access to the Keycloak.
-- You have the Cluster Admin role of the Kubernetes cluster.
+- You have an administrator role of the Keycloak realm.
+- You have an administrator role of the Kubernetes cluster.
 - You can configure the Kubernetes API server.
-- `kubectl` and `kubelogin` are installed to your computer.
+- `kubectl` and `kubelogin` are installed.
 
 ## 1. Setup Keycloak
 
 Open the Keycloak and create an OIDC client as follows:
 
-- Redirect URL: `http://localhost:8000/`
-- Issuer URL: `https://keycloak.example.com/auth/realms/YOUR_REALM`
 - Client ID: `kubernetes`
-- Groups claim: `groups`
+- Valid Redirect URLs:
+    - `http://localhost:8000`
+    - `http://localhost:18000` (used if the port 8000 is already in use)
+- Issuer URL: `https://keycloak.example.com/auth/realms/YOUR_REALM`
 
-Create a group `kubernetes:admin` and join to it.
-This is used for group based access control.
+You can associate client roles by adding the following mapper:
+
+- Name: `groups`
+- Mapper Type: `User Client Role`
+- Client ID: `kubernetes`
+- Client Role prefix: `kubernetes:`
+- Token Claim Name: `groups`
+- Add to ID token: on
+
+For example, if you have the `admin` role of the client, you will get a JWT with the claim `{"groups": ["kubernetes:admin"]}`.
 
 ## 2. Setup Kubernetes API server
 
 Configure your Kubernetes API server accepts [OpenID Connect Tokens](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#openid-connect-tokens).
 
-### kops
+```
+--oidc-issuer-url=https://keycloak.example.com/auth/realms/YOUR_REALM
+--oidc-client-id=kubernetes
+--oidc-groups-claim=groups
+```
 
-If you are using [kops](https://github.com/kubernetes/kops), run `kops edit cluster` and append the following settings:
+If you are using [kops](https://github.com/kubernetes/kops), run `kops edit cluster` and add the following spec:
 
 ```yaml
 spec:
@@ -50,57 +63,38 @@ roleRef:
   name: cluster-admin
 subjects:
 - kind: Group
-  name: /kubernetes:admin
+  name: kubernetes:admin
 ```
 
 You can create a custom role and assign it as well.
 
-## 4. Setup kubectl
+## 4. Setup kubeconfig
 
-Configure `kubectl` for the OIDC authentication.
-
-```sh
-kubectl config set-credentials NAME \
-  --auth-provider oidc \
-  --auth-provider-arg idp-issuer-url=https://keycloak.example.com/auth/realms/YOUR_REALM \
-  --auth-provider-arg client-id=kubernetes \
-  --auth-provider-arg client-secret=YOUR_CLIENT_SECRET
-```
-
-## 5. Run kubelogin
-
-Run `kubelogin`.
-
-```
-% kubelogin
-2018/08/10 10:36:38 Reading .kubeconfig
-2018/08/10 10:36:38 Using current context: hello.k8s.local
-2018/08/10 10:36:41 Open http://localhost:8000 for authorization
-2018/08/10 10:36:45 GET /
-2018/08/10 10:37:07 GET /?state=...&session_state=...&code=ey...
-2018/08/10 10:37:08 Updated .kubeconfig
-```
-
-Now your `~/.kube/config` should be like:
+Configure the kubeconfig like:
 
 ```yaml
 users:
-- name: hello.k8s.local
+- name: keycloak
   user:
-    auth-provider:
-      config:
-        idp-issuer-url: https://keycloak.example.com/auth/realms/YOUR_REALM
-        client-id: kubernetes
-        client-secret: YOUR_SECRET
-        id-token: ey...       # kubelogin will update ID token here
-        refresh-token: ey...  # kubelogin will update refresh token here
-      name: oidc
+    exec:
+      apiVersion: client.authentication.k8s.io/v1beta1
+      command: kubelogin
+      args:
+      - get-token
+      - --oidc-issuer-url=https://keycloak.example.com/auth/realms/YOUR_REALM
+      - --oidc-client-id=kubernetes
+      - --oidc-client-secret=YOUR_CLIENT_SECRET
 ```
 
+## 5. Run kubectl
+
 Make sure you can access to the Kubernetes cluster.
 
 ```
 % kubectl get nodes
+Open http://localhost:8000 for authentication
+You got a valid token until 2019-05-16 22:03:13 +0900 JST
+Updated ~/.kubeconfig
 NAME                                    STATUS    ROLES     AGE       VERSION
 ip-1-2-3-4.us-west-2.compute.internal   Ready     node      21d       v1.9.6
 ip-1-2-3-5.us-west-2.compute.internal   Ready     node      20d       v1.9.6

docs/team_ops.md

@@ -1,4 +1,4 @@
-# Team Operation
+# Team on-boarding
 
 ## kops
 
@@ -29,12 +29,14 @@ preferences: {}
 users:
 - name: hello.k8s.local
   user:
-    auth-provider:
-      name: oidc
-      config:
-        client-id: YOUR_CLIEND_ID
-        client-secret: YOUR_CLIENT_SECRET
-        idp-issuer-url: YOUR_ISSUER
+    exec:
+      apiVersion: client.authentication.k8s.io/v1beta1
+      command: kubelogin
+      args:
+      - get-token
+      - --oidc-issuer-url=https://keycloak.example.com/auth/realms/YOUR_REALM
+      - --oidc-client-id=YOUR_CLIENT_ID
+      - --oidc-client-secret=YOUR_CLIENT_SECRET
 ```
 
-You can share the kubeconfig to your team members for easy onboarding.
+You can share the kubeconfig to your team members for on-boarding.

e2e_test/credetial_plugin_test.go

@@ -0,0 +1,74 @@
+package e2e_test
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/mock_adaptors"
+	"github.com/int128/kubelogin/di"
+	"github.com/int128/kubelogin/e2e_test/idp"
+	"github.com/int128/kubelogin/e2e_test/idp/mock_idp"
+	"github.com/int128/kubelogin/e2e_test/localserver"
+	"github.com/int128/kubelogin/e2e_test/logger"
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"github.com/int128/kubelogin/usecases"
+)
+
+// Run the integration tests of the credential plugin use-case.
+//
+// 1. Start the auth server.
+// 2. Run the Cmd.
+// 3. Open a request for the local server.
+// 4. Verify the output.
+//
+func TestCmd_Run_CredentialPlugin(t *testing.T) {
+	timeout := 1 * time.Second
+
+	t.Run("Defaults", func(t *testing.T) {
+		t.Parallel()
+		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		defer cancel()
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+
+		service := mock_idp.NewMockService(ctrl)
+		serverURL, server := localserver.Start(t, idp.NewHandler(t, service))
+		defer server.Shutdown(t, ctx)
+		var idToken string
+		setupMockIDPForCodeFlow(t, service, serverURL, "openid", &idToken)
+
+		credentialPluginInteraction := mock_adaptors.NewMockCredentialPluginInteraction(ctrl)
+		credentialPluginInteraction.EXPECT().
+			Write(gomock.Any()).
+			Do(func(out credentialplugin.Output) {
+				if out.Token != idToken {
+					t.Errorf("Token wants %s but %s", idToken, out.Token)
+				}
+				if out.Expiry != tokenExpiryFuture {
+					t.Errorf("Expiry wants %v but %v", tokenExpiryFuture, out.Expiry)
+				}
+			})
+
+		req := startBrowserRequest(t, ctx, nil)
+		runGetTokenCmd(t, ctx, req, credentialPluginInteraction,
+			"--skip-open-browser",
+			"--listen-port", "0",
+			"--token-cache", "/dev/null",
+			"--oidc-issuer-url", serverURL,
+			"--oidc-client-id", "kubernetes",
+		)
+		req.wait()
+	})
+}
+
+func runGetTokenCmd(t *testing.T, ctx context.Context, s usecases.LoginShowLocalServerURL, interaction adaptors.CredentialPluginInteraction, args ...string) {
+	t.Helper()
+	cmd := di.NewCmdForHeadless(logger.New(t), s, interaction)
+	exitCode := cmd.Run(ctx, append([]string{"kubelogin", "get-token", "--v=1"}, args...), "HEAD")
+	if exitCode != 0 {
+		t.Errorf("exit status wants 0 but %d", exitCode)
+	}
+}

e2e_test/idp/handler.go

@@ -0,0 +1,142 @@
+// Package idp provides a test double of the identity provider of OpenID Connect.
+package idp
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+
+	"golang.org/x/xerrors"
+)
+
+func NewHandler(t *testing.T, service Service) *Handler {
+	return &Handler{t, service}
+}
+
+// Handler provides a HTTP handler for the identity provider of OpenID Connect.
+// You need to implement the Service interface.
+// Note that this skips some security checks and is only for testing.
+type Handler struct {
+	t       *testing.T
+	service Service
+}
+
+func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	wr := &responseWriterRecorder{w, 200}
+	err := h.serveHTTP(wr, r)
+	if err == nil {
+		h.t.Logf("%d %s %s", wr.statusCode, r.Method, r.RequestURI)
+		return
+	}
+	if errResp := new(ErrorResponse); xerrors.As(err, &errResp) {
+		h.t.Logf("400 %s %s: %s", r.Method, r.RequestURI, err)
+		w.Header().Add("Content-Type", "application/json")
+		w.WriteHeader(400)
+		e := json.NewEncoder(w)
+		if err := e.Encode(errResp); err != nil {
+			h.t.Errorf("idp/handler: could not write the response: %s", err)
+		}
+		return
+	}
+	h.t.Logf("500 %s %s: %s", r.Method, r.RequestURI, err)
+	http.Error(w, err.Error(), 500)
+}
+
+type responseWriterRecorder struct {
+	http.ResponseWriter
+	statusCode int
+}
+
+func (w *responseWriterRecorder) WriteHeader(statusCode int) {
+	w.ResponseWriter.WriteHeader(statusCode)
+	w.statusCode = statusCode
+}
+
+func (h *Handler) serveHTTP(w http.ResponseWriter, r *http.Request) error {
+	m := r.Method
+	p := r.URL.Path
+	switch {
+	case m == "GET" && p == "/.well-known/openid-configuration":
+		discoveryResponse := h.service.Discovery()
+		w.Header().Add("Content-Type", "application/json")
+		e := json.NewEncoder(w)
+		if err := e.Encode(discoveryResponse); err != nil {
+			return xerrors.Errorf("could not render json: %w", err)
+		}
+	case m == "GET" && p == "/certs":
+		certificatesResponse := h.service.GetCertificates()
+		w.Header().Add("Content-Type", "application/json")
+		e := json.NewEncoder(w)
+		if err := e.Encode(certificatesResponse); err != nil {
+			return xerrors.Errorf("could not render json: %w", err)
+		}
+	case m == "GET" && p == "/auth":
+		// 3.1.2.1. Authentication Request
+		// https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
+		q := r.URL.Query()
+		redirectURI, scope, state, nonce := q.Get("redirect_uri"), q.Get("scope"), q.Get("state"), q.Get("nonce")
+		code, err := h.service.AuthenticateCode(scope, nonce)
+		if err != nil {
+			return xerrors.Errorf("authentication error: %w", err)
+		}
+		to := fmt.Sprintf("%s?state=%s&code=%s", redirectURI, state, code)
+		http.Redirect(w, r, to, 302)
+	case m == "POST" && p == "/token":
+		if err := r.ParseForm(); err != nil {
+			return xerrors.Errorf("could not parse the form: %w", err)
+		}
+		grantType := r.Form.Get("grant_type")
+		switch grantType {
+		case "authorization_code":
+			// 3.1.3.1. Token Request
+			// https://openid.net/specs/openid-connect-core-1_0.html#TokenRequest
+			code := r.Form.Get("code")
+			tokenResponse, err := h.service.Exchange(code)
+			if err != nil {
+				return xerrors.Errorf("token request error: %w", err)
+			}
+			w.Header().Add("Content-Type", "application/json")
+			e := json.NewEncoder(w)
+			if err := e.Encode(tokenResponse); err != nil {
+				return xerrors.Errorf("could not render json: %w", err)
+			}
+		case "password":
+			// 4.3. Resource Owner Password Credentials Grant
+			// https://tools.ietf.org/html/rfc6749#section-4.3
+			username, password, scope := r.Form.Get("username"), r.Form.Get("password"), r.Form.Get("scope")
+			tokenResponse, err := h.service.AuthenticatePassword(username, password, scope)
+			if err != nil {
+				return xerrors.Errorf("authentication error: %w", err)
+			}
+			w.Header().Add("Content-Type", "application/json")
+			e := json.NewEncoder(w)
+			if err := e.Encode(tokenResponse); err != nil {
+				return xerrors.Errorf("could not render json: %w", err)
+			}
+		case "refresh_token":
+			// 12.1. Refresh Request
+			// https://openid.net/specs/openid-connect-core-1_0.html#RefreshingAccessToken
+			refreshToken := r.Form.Get("refresh_token")
+			tokenResponse, err := h.service.Refresh(refreshToken)
+			if err != nil {
+				return xerrors.Errorf("token refresh error: %w", err)
+			}
+			w.Header().Add("Content-Type", "application/json")
+			e := json.NewEncoder(w)
+			if err := e.Encode(tokenResponse); err != nil {
+				return xerrors.Errorf("could not render json: %w", err)
+			}
+		default:
+			// 5.2. Error Response
+			// https://tools.ietf.org/html/rfc6749#section-5.2
+			return &ErrorResponse{
+				Code:        "invalid_grant",
+				Description: fmt.Sprintf("unknown grant_type %s", grantType),
+			}
+		}
+	default:
+		http.NotFound(w, r)
+	}
+	return nil
+}

e2e_test/idp/mock_idp/mock_service.go

@@ -0,0 +1,110 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/int128/kubelogin/e2e_test/idp (interfaces: Service)
+
+// Package mock_idp is a generated GoMock package.
+package mock_idp
+
+import (
+	gomock "github.com/golang/mock/gomock"
+	idp "github.com/int128/kubelogin/e2e_test/idp"
+	reflect "reflect"
+)
+
+// MockService is a mock of Service interface
+type MockService struct {
+	ctrl     *gomock.Controller
+	recorder *MockServiceMockRecorder
+}
+
+// MockServiceMockRecorder is the mock recorder for MockService
+type MockServiceMockRecorder struct {
+	mock *MockService
+}
+
+// NewMockService creates a new mock instance
+func NewMockService(ctrl *gomock.Controller) *MockService {
+	mock := &MockService{ctrl: ctrl}
+	mock.recorder = &MockServiceMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockService) EXPECT() *MockServiceMockRecorder {
+	return m.recorder
+}
+
+// AuthenticateCode mocks base method
+func (m *MockService) AuthenticateCode(arg0, arg1 string) (string, error) {
+	ret := m.ctrl.Call(m, "AuthenticateCode", arg0, arg1)
+	ret0, _ := ret[0].(string)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// AuthenticateCode indicates an expected call of AuthenticateCode
+func (mr *MockServiceMockRecorder) AuthenticateCode(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthenticateCode", reflect.TypeOf((*MockService)(nil).AuthenticateCode), arg0, arg1)
+}
+
+// AuthenticatePassword mocks base method
+func (m *MockService) AuthenticatePassword(arg0, arg1, arg2 string) (*idp.TokenResponse, error) {
+	ret := m.ctrl.Call(m, "AuthenticatePassword", arg0, arg1, arg2)
+	ret0, _ := ret[0].(*idp.TokenResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// AuthenticatePassword indicates an expected call of AuthenticatePassword
+func (mr *MockServiceMockRecorder) AuthenticatePassword(arg0, arg1, arg2 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthenticatePassword", reflect.TypeOf((*MockService)(nil).AuthenticatePassword), arg0, arg1, arg2)
+}
+
+// Discovery mocks base method
+func (m *MockService) Discovery() *idp.DiscoveryResponse {
+	ret := m.ctrl.Call(m, "Discovery")
+	ret0, _ := ret[0].(*idp.DiscoveryResponse)
+	return ret0
+}
+
+// Discovery indicates an expected call of Discovery
+func (mr *MockServiceMockRecorder) Discovery() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Discovery", reflect.TypeOf((*MockService)(nil).Discovery))
+}
+
+// Exchange mocks base method
+func (m *MockService) Exchange(arg0 string) (*idp.TokenResponse, error) {
+	ret := m.ctrl.Call(m, "Exchange", arg0)
+	ret0, _ := ret[0].(*idp.TokenResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Exchange indicates an expected call of Exchange
+func (mr *MockServiceMockRecorder) Exchange(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Exchange", reflect.TypeOf((*MockService)(nil).Exchange), arg0)
+}
+
+// GetCertificates mocks base method
+func (m *MockService) GetCertificates() *idp.CertificatesResponse {
+	ret := m.ctrl.Call(m, "GetCertificates")
+	ret0, _ := ret[0].(*idp.CertificatesResponse)
+	return ret0
+}
+
+// GetCertificates indicates an expected call of GetCertificates
+func (mr *MockServiceMockRecorder) GetCertificates() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetCertificates", reflect.TypeOf((*MockService)(nil).GetCertificates))
+}
+
+// Refresh mocks base method
+func (m *MockService) Refresh(arg0 string) (*idp.TokenResponse, error) {
+	ret := m.ctrl.Call(m, "Refresh", arg0)
+	ret0, _ := ret[0].(*idp.TokenResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Refresh indicates an expected call of Refresh
+func (mr *MockServiceMockRecorder) Refresh(arg0 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Refresh", reflect.TypeOf((*MockService)(nil).Refresh), arg0)
+}

e2e_test/idp/service.go

@@ -0,0 +1,120 @@
+package idp
+
+//go:generate mockgen -destination mock_idp/mock_service.go github.com/int128/kubelogin/e2e_test/idp Service
+
+import (
+	"crypto/rsa"
+	"encoding/base64"
+	"fmt"
+	"math/big"
+)
+
+// Service provides discovery and authentication methods.
+// If an implemented method returns an ErrorResponse,
+// the handler will respond 400 and corresponding json of the ErrorResponse.
+// Otherwise, the handler will respond 500 and fail the current test.
+type Service interface {
+	Discovery() *DiscoveryResponse
+	GetCertificates() *CertificatesResponse
+	AuthenticateCode(scope, nonce string) (code string, err error)
+	Exchange(code string) (*TokenResponse, error)
+	AuthenticatePassword(username, password, scope string) (*TokenResponse, error)
+	Refresh(refreshToken string) (*TokenResponse, error)
+}
+
+type DiscoveryResponse struct {
+	Issuer                            string   `json:"issuer"`
+	AuthorizationEndpoint             string   `json:"authorization_endpoint"`
+	TokenEndpoint                     string   `json:"token_endpoint"`
+	UserinfoEndpoint                  string   `json:"userinfo_endpoint"`
+	RevocationEndpoint                string   `json:"revocation_endpoint"`
+	JwksURI                           string   `json:"jwks_uri"`
+	ResponseTypesSupported            []string `json:"response_types_supported"`
+	SubjectTypesSupported             []string `json:"subject_types_supported"`
+	IDTokenSigningAlgValuesSupported  []string `json:"id_token_signing_alg_values_supported"`
+	ScopesSupported                   []string `json:"scopes_supported"`
+	TokenEndpointAuthMethodsSupported []string `json:"token_endpoint_auth_methods_supported"`
+	ClaimsSupported                   []string `json:"claims_supported"`
+	CodeChallengeMethodsSupported     []string `json:"code_challenge_methods_supported"`
+}
+
+// NewDiscoveryResponse returns a DiscoveryResponse for the local server.
+// This is based on https://accounts.google.com/.well-known/openid-configuration.
+func NewDiscoveryResponse(issuer string) *DiscoveryResponse {
+	return &DiscoveryResponse{
+		Issuer:                            issuer,
+		AuthorizationEndpoint:             issuer + "/auth",
+		TokenEndpoint:                     issuer + "/token",
+		JwksURI:                           issuer + "/certs",
+		UserinfoEndpoint:                  issuer + "/userinfo",
+		RevocationEndpoint:                issuer + "/revoke",
+		ResponseTypesSupported:            []string{"code id_token"},
+		SubjectTypesSupported:             []string{"public"},
+		IDTokenSigningAlgValuesSupported:  []string{"RS256"},
+		ScopesSupported:                   []string{"openid", "email", "profile"},
+		TokenEndpointAuthMethodsSupported: []string{"client_secret_post", "client_secret_basic"},
+		CodeChallengeMethodsSupported:     []string{"plain", "S256"},
+		ClaimsSupported:                   []string{"aud", "email", "exp", "iat", "iss", "name", "sub"},
+	}
+}
+
+type CertificatesResponse struct {
+	Keys []*CertificatesResponseKey `json:"keys"`
+}
+
+type CertificatesResponseKey struct {
+	Kty string `json:"kty"`
+	Alg string `json:"alg"`
+	Use string `json:"use"`
+	Kid string `json:"kid"`
+	N   string `json:"n"`
+	E   string `json:"e"`
+}
+
+// NewCertificatesResponse returns a CertificatesResponse using the key pair.
+// This is used for verifying a signature of ID token.
+func NewCertificatesResponse(idTokenKeyPair *rsa.PrivateKey) *CertificatesResponse {
+	return &CertificatesResponse{
+		Keys: []*CertificatesResponseKey{
+			{
+				Kty: "RSA",
+				Alg: "RS256",
+				Use: "sig",
+				Kid: "dummy",
+				E:   base64.RawURLEncoding.EncodeToString(big.NewInt(int64(idTokenKeyPair.E)).Bytes()),
+				N:   base64.RawURLEncoding.EncodeToString(idTokenKeyPair.N.Bytes()),
+			},
+		},
+	}
+}
+
+type TokenResponse struct {
+	AccessToken  string `json:"access_token"`
+	TokenType    string `json:"token_type"`
+	RefreshToken string `json:"refresh_token"`
+	ExpiresIn    int    `json:"expires_in"`
+	IDToken      string `json:"id_token"`
+}
+
+// NewTokenResponse returns a TokenResponse.
+func NewTokenResponse(idToken, refreshToken string) *TokenResponse {
+	return &TokenResponse{
+		TokenType:    "Bearer",
+		ExpiresIn:    3600,
+		AccessToken:  "YOUR_ACCESS_TOKEN",
+		IDToken:      idToken,
+		RefreshToken: refreshToken,
+	}
+}
+
+// ErrorResponse represents an error response described in the following section:
+// 5.2 Error Response
+// https://tools.ietf.org/html/rfc6749#section-5.2
+type ErrorResponse struct {
+	Code        string `json:"error"`
+	Description string `json:"error_description"`
+}
+
+func (err *ErrorResponse) Error() string {
+	return fmt.Sprintf("%s(%s)", err.Code, err.Description)
+}

e2e_test/keys/keys.go

@@ -8,7 +8,7 @@ import (
 	"encoding/pem"
 	"io/ioutil"
 
-	"github.com/pkg/errors"
+	"golang.org/x/xerrors"
 )
 
 // TLSCACert is path to the CA certificate.
@@ -54,18 +54,18 @@ func init() {
 func readPrivateKey(name string) (*rsa.PrivateKey, error) {
 	b, err := ioutil.ReadFile(name)
 	if err != nil {
-		return nil, errors.Wrapf(err, "could not read JWSKey")
+		return nil, xerrors.Errorf("could not read JWSKey: %w", err)
 	}
 	block, rest := pem.Decode(b)
 	if block == nil {
-		return nil, errors.New("could not decode PEM")
+		return nil, xerrors.New("could not decode PEM")
 	}
 	if len(rest) > 0 {
-		return nil, errors.New("PEM should contain single key but multiple keys")
+		return nil, xerrors.New("PEM should contain single key but multiple keys")
 	}
 	k, err := x509.ParsePKCS1PrivateKey(block.Bytes)
 	if err != nil {
-		return nil, errors.Wrapf(err, "could not parse the key")
+		return nil, xerrors.Errorf("could not parse the key: %w", err)
 	}
 	return k, nil
 }

e2e_test/kubeconfig/kubeconfig.go

@@ -16,6 +16,7 @@ type Values struct {
 	IDPCertificateAuthority     string
 	IDPCertificateAuthorityData string
 	IDToken                     string
+	RefreshToken                string
 }
 
 // Create creates a kubeconfig file and returns path to it.

e2e_test/kubeconfig/testdata/dummy.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+current-context: dummy
+kind: Config
+preferences: {}

e2e_test/kubeconfig/testdata/kubeconfig.yaml

@@ -30,5 +30,8 @@ users:
 #{{ end }}
 #{{ if .IDToken }}
         id-token: {{ .IDToken }}
+#{{ end }}
+#{{ if .RefreshToken }}
+        refresh-token: {{ .RefreshToken }}
 #{{ end }}
       name: oidc

e2e_test/localserver/authserver.go

@@ -0,0 +1,76 @@
+// Package localserver provides a http server running on localhost.
+// This is only for testing.
+//
+package localserver
+
+import (
+	"context"
+	"net"
+	"net/http"
+	"testing"
+)
+
+type Shutdowner interface {
+	Shutdown(t *testing.T, ctx context.Context)
+}
+
+type shutdowner struct {
+	l net.Listener
+	s *http.Server
+}
+
+func (s *shutdowner) Shutdown(t *testing.T, ctx context.Context) {
+	// s.Shutdown() closes the lister as well,
+	// so we do not need to call l.Close() explicitly
+	if err := s.s.Shutdown(ctx); err != nil {
+		t.Errorf("Could not shutdown the server: %s", err)
+	}
+}
+
+// Start starts an authentication server.
+func Start(t *testing.T, h http.Handler) (string, Shutdowner) {
+	t.Helper()
+	l, port := newLocalhostListener(t)
+	url := "http://localhost:" + port
+	s := &http.Server{
+		Handler: h,
+	}
+	go func() {
+		err := s.Serve(l)
+		if err != nil && err != http.ErrServerClosed {
+			t.Error(err)
+		}
+	}()
+	return url, &shutdowner{l, s}
+}
+
+// Start starts an authentication server with TLS.
+func StartTLS(t *testing.T, cert string, key string, h http.Handler) (string, Shutdowner) {
+	t.Helper()
+	l, port := newLocalhostListener(t)
+	url := "https://localhost:" + port
+	s := &http.Server{
+		Handler: h,
+	}
+	go func() {
+		err := s.ServeTLS(l, cert, key)
+		if err != nil && err != http.ErrServerClosed {
+			t.Error(err)
+		}
+	}()
+	return url, &shutdowner{l, s}
+}
+
+func newLocalhostListener(t *testing.T) (net.Listener, string) {
+	t.Helper()
+	l, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Could not create a listener: %s", err)
+	}
+	addr := l.Addr().String()
+	_, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		t.Fatalf("Could not parse the address %s: %s", addr, err)
+	}
+	return l, port
+}

e2e_test/logger/logger.go

@@ -1,11 +1,12 @@
 package logger
 
 import (
-	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/logger"
 )
 
-func New(t testingLogger) *adaptors.Logger {
-	return adaptors.NewLoggerWith(&bridge{t})
+func New(t testingLogger) *logger.Logger {
+	b := &bridge{t}
+	return logger.NewWith(b, b)
 }
 
 type testingLogger interface {
@@ -19,3 +20,8 @@ type bridge struct {
 func (b *bridge) Printf(format string, v ...interface{}) {
 	b.t.Logf(format, v...)
 }
+
+func (b *bridge) Output(calldepth int, s string) error {
+	b.t.Logf("%s", s)
+	return nil
+}

e2e_test/login_test.go

@@ -0,0 +1,388 @@
+package e2e_test
+
+import (
+	"context"
+	"crypto/tls"
+	"net/http"
+	"os"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/dgrijalva/jwt-go"
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/di"
+	"github.com/int128/kubelogin/e2e_test/idp"
+	"github.com/int128/kubelogin/e2e_test/idp/mock_idp"
+	"github.com/int128/kubelogin/e2e_test/keys"
+	"github.com/int128/kubelogin/e2e_test/kubeconfig"
+	"github.com/int128/kubelogin/e2e_test/localserver"
+	"github.com/int128/kubelogin/e2e_test/logger"
+	"github.com/int128/kubelogin/usecases"
+)
+
+var (
+	tokenExpiryFuture = time.Now().Add(time.Hour).Round(time.Second)
+	tokenExpiryPast   = time.Now().Add(-time.Hour).Round(time.Second)
+)
+
+// Run the integration tests of the Login use-case.
+//
+// 1. Start the auth server.
+// 2. Run the Cmd.
+// 3. Open a request for the local server.
+// 4. Verify the kubeconfig.
+//
+func TestCmd_Run_Login(t *testing.T) {
+	timeout := 1 * time.Second
+
+	type testParameter struct {
+		startServer                       func(t *testing.T, h http.Handler) (string, localserver.Shutdowner)
+		kubeconfigIDPCertificateAuthority string
+		clientTLSConfig                   *tls.Config
+	}
+
+	testParameters := map[string]testParameter{
+		"NoTLS": {
+			startServer: localserver.Start,
+		},
+		"CACert": {
+			startServer: func(t *testing.T, h http.Handler) (string, localserver.Shutdowner) {
+				return localserver.StartTLS(t, keys.TLSServerCert, keys.TLSServerKey, h)
+			},
+			kubeconfigIDPCertificateAuthority: keys.TLSCACert,
+			clientTLSConfig:                   keys.TLSCACertAsConfig,
+		},
+	}
+
+	runTest := func(t *testing.T, p testParameter) {
+		t.Run("Defaults", func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+
+			service := mock_idp.NewMockService(ctrl)
+			serverURL, server := p.startServer(t, idp.NewHandler(t, service))
+			defer server.Shutdown(t, ctx)
+			var idToken string
+			setupMockIDPForCodeFlow(t, service, serverURL, "openid", &idToken)
+
+			kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+				Issuer:                  serverURL,
+				IDPCertificateAuthority: p.kubeconfigIDPCertificateAuthority,
+			})
+			defer os.Remove(kubeConfigFilename)
+
+			req := startBrowserRequest(t, ctx, p.clientTLSConfig)
+			runCmd(t, ctx, req, "--kubeconfig", kubeConfigFilename, "--skip-open-browser", "--listen-port", "0")
+			req.wait()
+			kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+				IDToken:      idToken,
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			})
+		})
+
+		t.Run("ResourceOwnerPasswordCredentials", func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+
+			service := mock_idp.NewMockService(ctrl)
+			serverURL, server := p.startServer(t, idp.NewHandler(t, service))
+			defer server.Shutdown(t, ctx)
+			idToken := newIDToken(t, serverURL, "", tokenExpiryFuture)
+			service.EXPECT().Discovery().Return(idp.NewDiscoveryResponse(serverURL))
+			service.EXPECT().GetCertificates().Return(idp.NewCertificatesResponse(keys.JWSKeyPair))
+			service.EXPECT().AuthenticatePassword("USER", "PASS", "openid").
+				Return(idp.NewTokenResponse(idToken, "YOUR_REFRESH_TOKEN"), nil)
+
+			kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+				Issuer:                  serverURL,
+				IDPCertificateAuthority: p.kubeconfigIDPCertificateAuthority,
+			})
+			defer os.Remove(kubeConfigFilename)
+
+			runCmd(t, ctx, &nopBrowserRequest{t}, "--kubeconfig", kubeConfigFilename, "--skip-open-browser", "--username", "USER", "--password", "PASS")
+			kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+				IDToken:      idToken,
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			})
+		})
+
+		t.Run("HasValidToken", func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+
+			service := mock_idp.NewMockService(ctrl)
+			serverURL, server := p.startServer(t, idp.NewHandler(t, service))
+			defer server.Shutdown(t, ctx)
+			idToken := newIDToken(t, serverURL, "YOUR_NONCE", tokenExpiryFuture)
+			service.EXPECT().Discovery().Return(idp.NewDiscoveryResponse(serverURL))
+			service.EXPECT().GetCertificates().Return(idp.NewCertificatesResponse(keys.JWSKeyPair))
+
+			kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+				Issuer:                  serverURL,
+				IDToken:                 idToken,
+				RefreshToken:            "YOUR_REFRESH_TOKEN",
+				IDPCertificateAuthority: p.kubeconfigIDPCertificateAuthority,
+			})
+			defer os.Remove(kubeConfigFilename)
+
+			runCmd(t, ctx, &nopBrowserRequest{t}, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
+			kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+				IDToken:      idToken,
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			})
+		})
+
+		t.Run("HasValidRefreshToken", func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+
+			service := mock_idp.NewMockService(ctrl)
+			serverURL, server := p.startServer(t, idp.NewHandler(t, service))
+			defer server.Shutdown(t, ctx)
+			idToken := newIDToken(t, serverURL, "YOUR_NONCE", tokenExpiryFuture)
+			service.EXPECT().Discovery().Return(idp.NewDiscoveryResponse(serverURL))
+			service.EXPECT().GetCertificates().Return(idp.NewCertificatesResponse(keys.JWSKeyPair))
+			service.EXPECT().Refresh("VALID_REFRESH_TOKEN").
+				Return(idp.NewTokenResponse(idToken, "NEW_REFRESH_TOKEN"), nil)
+
+			kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+				Issuer:                  serverURL,
+				IDToken:                 newIDToken(t, serverURL, "YOUR_NONCE", tokenExpiryPast), // expired
+				RefreshToken:            "VALID_REFRESH_TOKEN",
+				IDPCertificateAuthority: p.kubeconfigIDPCertificateAuthority,
+			})
+			defer os.Remove(kubeConfigFilename)
+
+			runCmd(t, ctx, &nopBrowserRequest{t}, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
+			kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+				IDToken:      idToken,
+				RefreshToken: "NEW_REFRESH_TOKEN",
+			})
+		})
+
+		t.Run("HasExpiredRefreshToken", func(t *testing.T) {
+			t.Parallel()
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+
+			service := mock_idp.NewMockService(ctrl)
+			serverURL, server := p.startServer(t, idp.NewHandler(t, service))
+			defer server.Shutdown(t, ctx)
+			var idToken string
+			setupMockIDPForCodeFlow(t, service, serverURL, "openid", &idToken)
+			service.EXPECT().Refresh("EXPIRED_REFRESH_TOKEN").
+				Return(nil, &idp.ErrorResponse{Code: "invalid_request", Description: "token has expired"}).
+				MaxTimes(2) // package oauth2 will retry refreshing the token
+
+			kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+				Issuer:                  serverURL,
+				IDToken:                 newIDToken(t, serverURL, "YOUR_NONCE", tokenExpiryPast), // expired
+				RefreshToken:            "EXPIRED_REFRESH_TOKEN",
+				IDPCertificateAuthority: p.kubeconfigIDPCertificateAuthority,
+			})
+			defer os.Remove(kubeConfigFilename)
+
+			req := startBrowserRequest(t, ctx, p.clientTLSConfig)
+			runCmd(t, ctx, req, "--kubeconfig", kubeConfigFilename, "--skip-open-browser")
+			kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+				IDToken:      idToken,
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			})
+		})
+	}
+
+	for name, p := range testParameters {
+		t.Run(name, func(t *testing.T) {
+			runTest(t, p)
+		})
+	}
+
+	t.Run("env:KUBECONFIG", func(t *testing.T) {
+		t.Parallel()
+		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		defer cancel()
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+
+		service := mock_idp.NewMockService(ctrl)
+		serverURL, server := localserver.Start(t, idp.NewHandler(t, service))
+		defer server.Shutdown(t, ctx)
+		var idToken string
+		setupMockIDPForCodeFlow(t, service, serverURL, "openid", &idToken)
+
+		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{Issuer: serverURL})
+		defer os.Remove(kubeConfigFilename)
+		setenv(t, "KUBECONFIG", kubeConfigFilename+string(os.PathListSeparator)+"kubeconfig/testdata/dummy.yaml")
+		defer unsetenv(t, "KUBECONFIG")
+
+		req := startBrowserRequest(t, ctx, nil)
+		runCmd(t, ctx, req, "--skip-open-browser", "--listen-port", "0")
+		req.wait()
+		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+			IDToken:      idToken,
+			RefreshToken: "YOUR_REFRESH_TOKEN",
+		})
+	})
+
+	t.Run("ExtraScopes", func(t *testing.T) {
+		t.Parallel()
+		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		defer cancel()
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+
+		service := mock_idp.NewMockService(ctrl)
+		serverURL, server := localserver.Start(t, idp.NewHandler(t, service))
+		defer server.Shutdown(t, ctx)
+		var idToken string
+		setupMockIDPForCodeFlow(t, service, serverURL, "profile groups openid", &idToken)
+
+		kubeConfigFilename := kubeconfig.Create(t, &kubeconfig.Values{
+			Issuer:      serverURL,
+			ExtraScopes: "profile,groups",
+		})
+		defer os.Remove(kubeConfigFilename)
+
+		req := startBrowserRequest(t, ctx, nil)
+		runCmd(t, ctx, req, "--kubeconfig", kubeConfigFilename, "--skip-open-browser", "--listen-port", "0")
+		req.wait()
+		kubeconfig.Verify(t, kubeConfigFilename, kubeconfig.AuthProviderConfig{
+			IDToken:      idToken,
+			RefreshToken: "YOUR_REFRESH_TOKEN",
+		})
+	})
+}
+
+func newIDToken(t *testing.T, issuer, nonce string, expiry time.Time) string {
+	t.Helper()
+	var claims struct {
+		jwt.StandardClaims
+		Nonce  string   `json:"nonce"`
+		Groups []string `json:"groups"`
+	}
+	claims.StandardClaims = jwt.StandardClaims{
+		Issuer:    issuer,
+		Audience:  "kubernetes",
+		Subject:   "SUBJECT",
+		IssuedAt:  time.Now().Unix(),
+		ExpiresAt: expiry.Unix(),
+	}
+	claims.Nonce = nonce
+	claims.Groups = []string{"admin", "users"}
+	token := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
+	s, err := token.SignedString(keys.JWSKeyPair)
+	if err != nil {
+		t.Fatalf("Could not sign the claims: %s", err)
+	}
+	return s
+}
+
+func setupMockIDPForCodeFlow(t *testing.T, service *mock_idp.MockService, serverURL, scope string, idToken *string) {
+	var nonce string
+	service.EXPECT().Discovery().Return(idp.NewDiscoveryResponse(serverURL))
+	service.EXPECT().GetCertificates().Return(idp.NewCertificatesResponse(keys.JWSKeyPair))
+	service.EXPECT().AuthenticateCode(scope, gomock.Any()).
+		DoAndReturn(func(_, gotNonce string) (string, error) {
+			nonce = gotNonce
+			return "YOUR_AUTH_CODE", nil
+		})
+	service.EXPECT().Exchange("YOUR_AUTH_CODE").
+		DoAndReturn(func(string) (*idp.TokenResponse, error) {
+			*idToken = newIDToken(t, serverURL, nonce, tokenExpiryFuture)
+			return idp.NewTokenResponse(*idToken, "YOUR_REFRESH_TOKEN"), nil
+		})
+}
+
+func runCmd(t *testing.T, ctx context.Context, s usecases.LoginShowLocalServerURL, args ...string) {
+	t.Helper()
+	cmd := di.NewCmdForHeadless(logger.New(t), s, nil)
+	exitCode := cmd.Run(ctx, append([]string{"kubelogin", "--v=1"}, args...), "HEAD")
+	if exitCode != 0 {
+		t.Errorf("exit status wants 0 but %d", exitCode)
+	}
+}
+
+type nopBrowserRequest struct {
+	t *testing.T
+}
+
+func (r *nopBrowserRequest) ShowLocalServerURL(url string) {
+	r.t.Errorf("ShowLocalServerURL must not be called")
+}
+
+type browserRequest struct {
+	t     *testing.T
+	urlCh chan<- string
+	wg    *sync.WaitGroup
+}
+
+func (r *browserRequest) ShowLocalServerURL(url string) {
+	defer close(r.urlCh)
+	r.t.Logf("Open %s for authentication", url)
+	r.urlCh <- url
+}
+
+func (r *browserRequest) wait() {
+	r.wg.Wait()
+}
+
+func startBrowserRequest(t *testing.T, ctx context.Context, tlsConfig *tls.Config) *browserRequest {
+	t.Helper()
+	urlCh := make(chan string)
+	var wg sync.WaitGroup
+	go func() {
+		defer wg.Done()
+		select {
+		case url := <-urlCh:
+			client := http.Client{Transport: &http.Transport{TLSClientConfig: tlsConfig}}
+			req, err := http.NewRequest("GET", url, nil)
+			if err != nil {
+				t.Errorf("could not create a request: %s", err)
+				return
+			}
+			req = req.WithContext(ctx)
+			resp, err := client.Do(req)
+			if err != nil {
+				t.Errorf("could not send a request: %s", err)
+				return
+			}
+			defer resp.Body.Close()
+			if resp.StatusCode != 200 {
+				t.Errorf("StatusCode wants 200 but %d", resp.StatusCode)
+			}
+		case err := <-ctx.Done():
+			t.Errorf("context done while waiting for URL prompt: %s", err)
+		}
+	}()
+	wg.Add(1)
+	return &browserRequest{t, urlCh, &wg}
+}
+
+func setenv(t *testing.T, key, value string) {
+	t.Helper()
+	if err := os.Setenv(key, value); err != nil {
+		t.Fatalf("Could not set the env var %s=%s: %s", key, value, err)
+	}
+}
+
+func unsetenv(t *testing.T, key string) {
+	t.Helper()
+	if err := os.Unsetenv(key); err != nil {
+		t.Fatalf("Could not unset the env var %s: %s", key, err)
+	}
+}

go.mod

@@ -1,35 +1,22 @@
 module github.com/int128/kubelogin
 
+go 1.12
+
 require (
 	github.com/coreos/go-oidc v2.0.0+incompatible
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible
-	github.com/gogo/protobuf v1.2.1 // indirect
-	github.com/golang/mock v1.2.0
-	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf // indirect
-	github.com/imdario/mergo v0.3.7 // indirect
-	github.com/int128/oauth2cli v1.2.1
-	github.com/jessevdk/go-flags v1.4.0
-	github.com/json-iterator/go v1.1.6 // indirect
-	github.com/mitchellh/go-homedir v1.1.0
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.1 // indirect
-	github.com/pkg/errors v0.8.1
+	github.com/dgrijalva/jwt-go v0.0.0-20160705203006-01aeca54ebda
+	github.com/go-test/deep v1.0.2
+	github.com/golang/mock v1.3.1
+	github.com/google/wire v0.3.0
+	github.com/int128/oauth2cli v1.4.1
 	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
-	github.com/spf13/pflag v1.0.3 // indirect
-	github.com/stretchr/testify v1.3.0 // indirect
-	go.uber.org/dig v1.7.0
-	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
-	golang.org/x/net v0.0.0-20190328230028-74de082e2cca // indirect
-	golang.org/x/oauth2 v0.0.0-20190319182350-c85d3e98c914
-	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6
-	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
-	gopkg.in/inf.v0 v0.9.1 // indirect
-	gopkg.in/square/go-jose.v2 v2.3.0 // indirect
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/pflag v1.0.3
+	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
+	golang.org/x/oauth2 v0.0.0-20190402181905-9f3314589c9a
+	golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7
+	gopkg.in/square/go-jose.v2 v2.3.1 // indirect
 	gopkg.in/yaml.v2 v2.2.2
-	k8s.io/api v0.0.0-20190222213804-5cb15d344471 // indirect
-	k8s.io/apimachinery v0.0.0-20190221213512-86fb29eff628 // indirect
-	k8s.io/client-go v10.0.0+incompatible
-	k8s.io/klog v0.2.0 // indirect
-	sigs.k8s.io/yaml v1.1.0 // indirect
+	k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719
+	k8s.io/client-go v0.0.0-20190620085101-78d2af792bab
 )

go.sum

@@ -1,88 +1,145 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/Azure/go-autorest v11.1.2+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-oidc v2.0.0+incompatible h1:+RStIopZ8wooMx+Vs5Bt8zMXxV1ABl5LbakNExNmZIg=
 github.com/coreos/go-oidc v2.0.0+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
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kubeconfig/auth.go

@@ -1,80 +0,0 @@
-package kubeconfig
-
-import (
-	"strings"
-
-	"github.com/pkg/errors"
-	"k8s.io/client-go/tools/clientcmd/api"
-)
-
-// FindOIDCAuthProvider returns the current OIDC authProvider.
-// If the context, auth-info or auth-provider does not exist, this returns an error.
-// If auth-provider is not "oidc", this returns an error.
-func FindOIDCAuthProvider(config *api.Config) (*OIDCAuthProvider, error) {
-	context := config.Contexts[config.CurrentContext]
-	if context == nil {
-		return nil, errors.Errorf("context %s does not exist", config.CurrentContext)
-	}
-	authInfo := config.AuthInfos[context.AuthInfo]
-	if authInfo == nil {
-		return nil, errors.Errorf("auth-info %s does not exist", context.AuthInfo)
-	}
-	if authInfo.AuthProvider == nil {
-		return nil, errors.Errorf("auth-provider is not set")
-	}
-	if authInfo.AuthProvider.Name != "oidc" {
-		return nil, errors.Errorf("auth-provider name is %s but must be oidc", authInfo.AuthProvider.Name)
-	}
-	return (*OIDCAuthProvider)(authInfo.AuthProvider), nil
-}
-
-// OIDCAuthProvider represents OIDC configuration in the kubeconfig.
-type OIDCAuthProvider api.AuthProviderConfig
-
-// IDPIssuerURL returns the idp-issuer-url.
-func (c *OIDCAuthProvider) IDPIssuerURL() string {
-	return c.Config["idp-issuer-url"]
-}
-
-// ClientID returns the client-id.
-func (c *OIDCAuthProvider) ClientID() string {
-	return c.Config["client-id"]
-}
-
-// ClientSecret returns the client-secret.
-func (c *OIDCAuthProvider) ClientSecret() string {
-	return c.Config["client-secret"]
-}
-
-// IDPCertificateAuthority returns the idp-certificate-authority.
-func (c *OIDCAuthProvider) IDPCertificateAuthority() string {
-	return c.Config["idp-certificate-authority"]
-}
-
-// IDPCertificateAuthorityData returns the idp-certificate-authority-data.
-func (c *OIDCAuthProvider) IDPCertificateAuthorityData() string {
-	return c.Config["idp-certificate-authority-data"]
-}
-
-// ExtraScopes returns the extra-scopes.
-func (c *OIDCAuthProvider) ExtraScopes() []string {
-	if c.Config["extra-scopes"] == "" {
-		return []string{}
-	}
-	return strings.Split(c.Config["extra-scopes"], ",")
-}
-
-// IDToken returns the id-token.
-func (c *OIDCAuthProvider) IDToken() string {
-	return c.Config["id-token"]
-}
-
-// SetIDToken replaces the id-token.
-func (c *OIDCAuthProvider) SetIDToken(idToken string) {
-	c.Config["id-token"] = idToken
-}
-
-// SetRefreshToken replaces the refresh-token.
-func (c *OIDCAuthProvider) SetRefreshToken(refreshToken string) {
-	c.Config["refresh-token"] = refreshToken
-}

kubelogin.rb

@@ -3,7 +3,7 @@ class Kubelogin < Formula
   homepage "https://github.com/int128/kubelogin"
   url "https://github.com/int128/kubelogin/releases/download/{{ env "VERSION" }}/kubelogin_darwin_amd64.zip"
   version "{{ env "VERSION" }}"
-  sha256 "{{ .darwin_amd64_zip_sha256 }}"
+  sha256 "{{ sha256 .darwin_amd64_archive }}"
   def install
     bin.install "kubelogin" => "kubelogin"
     ln_s bin/"kubelogin", bin/"kubectl-oidc_login"

main.go

@@ -2,19 +2,13 @@ package main
 
 import (
 	"context"
-	"log"
 	"os"
 
-	"github.com/int128/kubelogin/adaptors/interfaces"
 	"github.com/int128/kubelogin/di"
 )
 
 var version = "HEAD"
 
 func main() {
-	if err := di.Invoke(func(cmd adaptors.Cmd) {
-		os.Exit(cmd.Run(context.Background(), os.Args, version))
-	}); err != nil {
-		log.Fatalf("Error: %s", err)
-	}
+	os.Exit(di.NewCmd().Run(context.Background(), os.Args, version))
 }

models/credentialplugin/credential_plugin.go

@@ -0,0 +1,16 @@
+// Package credentialplugin provides models for the credential plugin.
+package credentialplugin
+
+import "time"
+
+// TokenCache represents a token object cached.
+type TokenCache struct {
+	IDToken      string `json:"id_token,omitempty"`
+	RefreshToken string `json:"refresh_token,omitempty"`
+}
+
+// Output represents an output object of the credential plugin.
+type Output struct {
+	Token  string
+	Expiry time.Time
+}

models/kubeconfig/kubeconfig.go

@@ -0,0 +1,28 @@
+package kubeconfig
+
+// ContextName represents name of a context.
+type ContextName string
+
+// UserName represents name of a user.
+type UserName string
+
+// AuthProvider represents the authentication provider,
+// i.e. context, user and auth-provider in a kubeconfig.
+type AuthProvider struct {
+	LocationOfOrigin string      // Path to the kubeconfig file which contains the user
+	UserName         UserName    // User name
+	ContextName      ContextName // Context name (optional)
+	OIDCConfig       OIDCConfig
+}
+
+// OIDCConfig represents a configuration of an OIDC provider.
+type OIDCConfig struct {
+	IDPIssuerURL                string   // idp-issuer-url
+	ClientID                    string   // client-id
+	ClientSecret                string   // client-secret
+	IDPCertificateAuthority     string   // (optional) idp-certificate-authority
+	IDPCertificateAuthorityData string   // (optional) idp-certificate-authority-data
+	ExtraScopes                 []string // (optional) extra-scopes
+	IDToken                     string   // (optional) id-token
+	RefreshToken                string   // (optional) refresh-token
+}

oidc-login.yaml

@@ -3,30 +3,20 @@ kind: Plugin
 metadata:
   name: oidc-login
 spec:
-  shortDescription: Login for OpenID Connect authentication
+  homepage: https://github.com/int128/kubelogin
+  shortDescription: kubectl integration for OpenID Connect authentication
   description: |
-    This plugin gets a token from the OIDC provider and writes it to the kubeconfig.
-
-    Just run:
-      % kubectl oidc-login
-
-    It opens the browser and you can log in to the provider.
-    After authentication, it gets an ID token and refresh token and writes them to the kubeconfig.
+    Kubelogin integrates browser based authentication with kubectl.
+    You do not need to manually set an ID token and refresh token to the kubeconfig.
 
   caveats: |
-    You need to setup the following components:
-      * OIDC provider
-      * Kubernetes API server
-      * Role for your group or user
-      * kubectl authentication
-
+    You need to setup the OIDC provider, Kubernetes API server, role binding and kubeconfig.
     See https://github.com/int128/kubelogin for more.
 
-  homepage: https://github.com/int128/kubelogin
   version: {{ env "VERSION" }}
   platforms:
     - uri: https://github.com/int128/kubelogin/releases/download/{{ env "VERSION" }}/kubelogin_linux_amd64.zip
-      sha256: "{{ .linux_amd64_zip_sha256 }}"
+      sha256: "{{ sha256 .linux_amd64_archive }}"
       bin: kubelogin
       files:
         - from: "kubelogin"
@@ -36,7 +26,7 @@ spec:
           os: linux
           arch: amd64
     - uri: https://github.com/int128/kubelogin/releases/download/{{ env "VERSION" }}/kubelogin_darwin_amd64.zip
-      sha256: "{{ .darwin_amd64_zip_sha256 }}"
+      sha256: "{{ sha256 .darwin_amd64_archive }}"
       bin: kubelogin
       files:
         - from: "kubelogin"
@@ -46,7 +36,7 @@ spec:
           os: darwin
           arch: amd64
     - uri: https://github.com/int128/kubelogin/releases/download/{{ env "VERSION" }}/kubelogin_windows_amd64.zip
-      sha256: "{{ .windows_amd64_zip_sha256 }}"
+      sha256: "{{ sha256 .windows_amd64_archive }}"
       bin: kubelogin.exe
       files:
         - from: "kubelogin.exe"

usecases/auth/auth.go

@@ -0,0 +1,139 @@
+package auth
+
+import (
+	"context"
+	"time"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/usecases"
+	"golang.org/x/xerrors"
+)
+
+// Set provides the use-case of Authentication.
+var Set = wire.NewSet(
+	wire.Struct(new(Authentication), "*"),
+	wire.Bind(new(usecases.Authentication), new(*Authentication)),
+)
+
+// ExtraSet is a set of interaction components for e2e testing.
+var ExtraSet = wire.NewSet(
+	wire.Struct(new(ShowLocalServerURL), "*"),
+	wire.Bind(new(usecases.LoginShowLocalServerURL), new(*ShowLocalServerURL)),
+)
+
+const passwordPrompt = "Password: "
+
+// Authentication provides the internal use-case of authentication.
+//
+// If the IDToken is not set, it performs the authentication flow.
+// If the IDToken is valid, it does nothing.
+// If the IDtoken has expired and the RefreshToken is set, it refreshes the token.
+// If the RefreshToken has expired, it performs the authentication flow.
+//
+// The authentication flow is determined as:
+//
+// If the Username is not set, it performs the authorization code flow.
+// Otherwise, it performs the resource owner password credentials flow.
+// If the Password is not set, it asks a password by the prompt.
+//
+type Authentication struct {
+	OIDC               adaptors.OIDC
+	Env                adaptors.Env
+	Logger             adaptors.Logger
+	ShowLocalServerURL usecases.LoginShowLocalServerURL
+}
+
+func (u *Authentication) Do(ctx context.Context, in usecases.AuthenticationIn) (*usecases.AuthenticationOut, error) {
+	client, err := u.OIDC.New(ctx, adaptors.OIDCClientConfig{
+		Config:         in.OIDCConfig,
+		CACertFilename: in.CACertFilename,
+		SkipTLSVerify:  in.SkipTLSVerify,
+	})
+	if err != nil {
+		return nil, xerrors.Errorf("could not create an OIDC client: %w", err)
+	}
+
+	if in.OIDCConfig.IDToken != "" {
+		u.Logger.Debugf(1, "Verifying the existing token")
+		out, err := client.Verify(ctx, adaptors.OIDCVerifyIn{IDToken: in.OIDCConfig.IDToken})
+		if err != nil {
+			return nil, xerrors.Errorf("you need to remove the existing token manually: %w", err)
+		}
+		if out.IDTokenExpiry.After(time.Now()) { //TODO: inject time service
+			u.Logger.Debugf(1, "You already have a valid token")
+			return &usecases.AuthenticationOut{
+				AlreadyHasValidIDToken: true,
+				IDToken:                in.OIDCConfig.IDToken,
+				RefreshToken:           in.OIDCConfig.RefreshToken,
+				IDTokenExpiry:          out.IDTokenExpiry,
+				IDTokenClaims:          out.IDTokenClaims,
+			}, nil
+		}
+		u.Logger.Debugf(1, "You have an expired token at %s", out.IDTokenExpiry)
+	}
+
+	if in.OIDCConfig.RefreshToken != "" {
+		u.Logger.Debugf(1, "Refreshing the token")
+		out, err := client.Refresh(ctx, adaptors.OIDCRefreshIn{
+			RefreshToken: in.OIDCConfig.RefreshToken,
+		})
+		if err == nil {
+			return &usecases.AuthenticationOut{
+				IDToken:       out.IDToken,
+				RefreshToken:  out.RefreshToken,
+				IDTokenExpiry: out.IDTokenExpiry,
+				IDTokenClaims: out.IDTokenClaims,
+			}, nil
+		}
+		u.Logger.Debugf(1, "Could not refresh the token: %s", err)
+	}
+
+	if in.Username == "" {
+		u.Logger.Debugf(1, "Performing the authentication code flow")
+		out, err := client.AuthenticateByCode(ctx, adaptors.OIDCAuthenticateByCodeIn{
+			LocalServerPort:    in.ListenPort,
+			SkipOpenBrowser:    in.SkipOpenBrowser,
+			ShowLocalServerURL: u.ShowLocalServerURL,
+		})
+		if err != nil {
+			return nil, xerrors.Errorf("error while the authorization code flow: %w", err)
+		}
+		return &usecases.AuthenticationOut{
+			IDToken:       out.IDToken,
+			RefreshToken:  out.RefreshToken,
+			IDTokenExpiry: out.IDTokenExpiry,
+			IDTokenClaims: out.IDTokenClaims,
+		}, nil
+	}
+
+	u.Logger.Debugf(1, "Performing the resource owner password credentials flow")
+	if in.Password == "" {
+		in.Password, err = u.Env.ReadPassword(passwordPrompt)
+		if err != nil {
+			return nil, xerrors.Errorf("could not read a password: %w", err)
+		}
+	}
+	out, err := client.AuthenticateByPassword(ctx, adaptors.OIDCAuthenticateByPasswordIn{
+		Username: in.Username,
+		Password: in.Password,
+	})
+	if err != nil {
+		return nil, xerrors.Errorf("error while the resource owner password credentials flow: %w", err)
+	}
+	return &usecases.AuthenticationOut{
+		IDToken:       out.IDToken,
+		RefreshToken:  out.RefreshToken,
+		IDTokenExpiry: out.IDTokenExpiry,
+		IDTokenClaims: out.IDTokenClaims,
+	}, nil
+}
+
+// ShowLocalServerURL just shows the URL of local server to console.
+type ShowLocalServerURL struct {
+	Logger adaptors.Logger
+}
+
+func (s *ShowLocalServerURL) ShowLocalServerURL(url string) {
+	s.Logger.Printf("Open %s for authentication", url)
+}

usecases/auth/auth_test.go

@@ -0,0 +1,368 @@
+package auth
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/go-test/deep"
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/adaptors/mock_adaptors"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"github.com/int128/kubelogin/usecases"
+	"golang.org/x/xerrors"
+)
+
+func TestAuthentication_Do(t *testing.T) {
+	dummyTokenClaims := map[string]string{"sub": "YOUR_SUBJECT"}
+	pastTime := time.Now().Add(-time.Hour)  //TODO: inject time service
+	futureTime := time.Now().Add(time.Hour) //TODO: inject time service
+
+	t.Run("AuthorizationCodeFlow", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			ListenPort:      []int{10000},
+			SkipOpenBrowser: true,
+			CACertFilename:  "/path/to/cert",
+			SkipTLSVerify:   true,
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			AuthenticateByCode(ctx, adaptors.OIDCAuthenticateByCodeIn{
+				LocalServerPort: []int{10000},
+				SkipOpenBrowser: true,
+			}).
+			Return(&adaptors.OIDCAuthenticateOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config:         in.OIDCConfig,
+				CACertFilename: "/path/to/cert",
+				SkipTLSVerify:  true,
+			}).
+			Return(mockOIDCClient, nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			IDToken:       "YOUR_ID_TOKEN",
+			RefreshToken:  "YOUR_REFRESH_TOKEN",
+			IDTokenExpiry: futureTime,
+			IDTokenClaims: dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("ResourceOwnerPasswordCredentialsFlow/UsePassword", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			Username:       "USER",
+			Password:       "PASS",
+			CACertFilename: "/path/to/cert",
+			SkipTLSVerify:  true,
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			AuthenticateByPassword(ctx, adaptors.OIDCAuthenticateByPasswordIn{
+				Username: "USER",
+				Password: "PASS",
+			}).
+			Return(&adaptors.OIDCAuthenticateOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config:         in.OIDCConfig,
+				CACertFilename: "/path/to/cert",
+				SkipTLSVerify:  true,
+			}).
+			Return(mockOIDCClient, nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			IDToken:       "YOUR_ID_TOKEN",
+			RefreshToken:  "YOUR_REFRESH_TOKEN",
+			IDTokenExpiry: futureTime,
+			IDTokenClaims: dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("ResourceOwnerPasswordCredentialsFlow/AskPassword", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			Username: "USER",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			AuthenticateByPassword(ctx, adaptors.OIDCAuthenticateByPasswordIn{
+				Username: "USER",
+				Password: "PASS",
+			}).
+			Return(&adaptors.OIDCAuthenticateOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config: in.OIDCConfig,
+			}).
+			Return(mockOIDCClient, nil)
+		mockEnv := mock_adaptors.NewMockEnv(ctrl)
+		mockEnv.EXPECT().ReadPassword(passwordPrompt).Return("PASS", nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Env:    mockEnv,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			IDToken:       "YOUR_ID_TOKEN",
+			RefreshToken:  "YOUR_REFRESH_TOKEN",
+			IDTokenExpiry: futureTime,
+			IDTokenClaims: dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("ResourceOwnerPasswordCredentialsFlow/AskPasswordError", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			Username: "USER",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config: in.OIDCConfig,
+			}).
+			Return(mock_adaptors.NewMockOIDCClient(ctrl), nil)
+		mockEnv := mock_adaptors.NewMockEnv(ctrl)
+		mockEnv.EXPECT().ReadPassword(passwordPrompt).Return("", xerrors.New("error"))
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Env:    mockEnv,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err == nil {
+			t.Errorf("err wants non-nil but nil")
+		}
+		if out != nil {
+			t.Errorf("out wants nil but %+v", out)
+		}
+	})
+
+	t.Run("HasValidIDToken", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+				IDToken:      "VALID_ID_TOKEN",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			Verify(ctx, adaptors.OIDCVerifyIn{IDToken: "VALID_ID_TOKEN"}).
+			Return(&adaptors.OIDCVerifyOut{
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config: in.OIDCConfig,
+			}).
+			Return(mockOIDCClient, nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			AlreadyHasValidIDToken: true,
+			IDToken:                "VALID_ID_TOKEN",
+			IDTokenExpiry:          futureTime,
+			IDTokenClaims:          dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("HasValidRefreshToken", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+				IDToken:      "EXPIRED_ID_TOKEN",
+				RefreshToken: "VALID_REFRESH_TOKEN",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			Verify(ctx, adaptors.OIDCVerifyIn{IDToken: "EXPIRED_ID_TOKEN"}).
+			Return(&adaptors.OIDCVerifyOut{
+				IDTokenExpiry: pastTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDCClient.EXPECT().
+			Refresh(ctx, adaptors.OIDCRefreshIn{
+				RefreshToken: "VALID_REFRESH_TOKEN",
+			}).
+			Return(&adaptors.OIDCAuthenticateOut{
+				IDToken:       "NEW_ID_TOKEN",
+				RefreshToken:  "NEW_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config: in.OIDCConfig,
+			}).
+			Return(mockOIDCClient, nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			IDToken:       "NEW_ID_TOKEN",
+			RefreshToken:  "NEW_REFRESH_TOKEN",
+			IDTokenExpiry: futureTime,
+			IDTokenClaims: dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+
+	t.Run("HasExpiredRefreshToken", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.AuthenticationIn{
+			ListenPort: []int{10000},
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+				IDToken:      "EXPIRED_ID_TOKEN",
+				RefreshToken: "EXPIRED_REFRESH_TOKEN",
+			},
+		}
+		mockOIDCClient := mock_adaptors.NewMockOIDCClient(ctrl)
+		mockOIDCClient.EXPECT().
+			Verify(ctx, adaptors.OIDCVerifyIn{IDToken: "EXPIRED_ID_TOKEN"}).
+			Return(&adaptors.OIDCVerifyOut{
+				IDTokenExpiry: pastTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDCClient.EXPECT().
+			Refresh(ctx, adaptors.OIDCRefreshIn{
+				RefreshToken: "EXPIRED_REFRESH_TOKEN",
+			}).
+			Return(nil, xerrors.New("token has expired"))
+		mockOIDCClient.EXPECT().
+			AuthenticateByCode(ctx, adaptors.OIDCAuthenticateByCodeIn{
+				LocalServerPort: []int{10000},
+			}).
+			Return(&adaptors.OIDCAuthenticateOut{
+				IDToken:       "NEW_ID_TOKEN",
+				RefreshToken:  "NEW_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
+		mockOIDC.EXPECT().
+			New(ctx, adaptors.OIDCClientConfig{
+				Config: in.OIDCConfig,
+			}).
+			Return(mockOIDCClient, nil)
+		u := Authentication{
+			OIDC:   mockOIDC,
+			Logger: mock_adaptors.NewLogger(t, ctrl),
+		}
+		out, err := u.Do(ctx, in)
+		if err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+		want := &usecases.AuthenticationOut{
+			IDToken:       "NEW_ID_TOKEN",
+			RefreshToken:  "NEW_REFRESH_TOKEN",
+			IDTokenExpiry: futureTime,
+			IDTokenClaims: dummyTokenClaims,
+		}
+		if diff := deep.Equal(want, out); diff != nil {
+			t.Error(diff)
+		}
+	})
+}

usecases/credentialplugin/get_token.go

@@ -0,0 +1,73 @@
+// Package credentialplugin provides the use-cases for running as a client-go credentials plugin.
+//
+// See https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins
+package credentialplugin
+
+import (
+	"context"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"github.com/int128/kubelogin/usecases"
+	"golang.org/x/xerrors"
+)
+
+var Set = wire.NewSet(
+	wire.Struct(new(GetToken), "*"),
+	wire.Bind(new(usecases.GetToken), new(*GetToken)),
+)
+
+type GetToken struct {
+	Authentication       usecases.Authentication
+	TokenCacheRepository adaptors.TokenCacheRepository
+	Interaction          adaptors.CredentialPluginInteraction
+	Logger               adaptors.Logger
+}
+
+func (u *GetToken) Do(ctx context.Context, in usecases.GetTokenIn) error {
+	u.Logger.Debugf(1, "WARNING: log may contain your secrets such as token or password")
+
+	tokenCache, err := u.TokenCacheRepository.Read(in.TokenCacheFilename)
+	if err != nil {
+		u.Logger.Debugf(1, "could not read the token cache file: %s", err)
+		tokenCache = &credentialplugin.TokenCache{}
+	}
+	out, err := u.Authentication.Do(ctx, usecases.AuthenticationIn{
+		OIDCConfig: kubeconfig.OIDCConfig{
+			IDPIssuerURL: in.IssuerURL,
+			ClientID:     in.ClientID,
+			ClientSecret: in.ClientSecret,
+			ExtraScopes:  in.ExtraScopes,
+			IDToken:      tokenCache.IDToken,
+			RefreshToken: tokenCache.RefreshToken,
+		},
+		SkipOpenBrowser: in.SkipOpenBrowser,
+		ListenPort:      in.ListenPort,
+		Username:        in.Username,
+		Password:        in.Password,
+		CACertFilename:  in.CACertFilename,
+		SkipTLSVerify:   in.SkipTLSVerify,
+	})
+	if err != nil {
+		return xerrors.Errorf("error while authentication: %w", err)
+	}
+	for k, v := range out.IDTokenClaims {
+		u.Logger.Debugf(1, "ID token has the claim: %s=%v", k, v)
+	}
+	if !out.AlreadyHasValidIDToken {
+		u.Logger.Printf("You got a valid token until %s", out.IDTokenExpiry)
+		if err := u.TokenCacheRepository.Write(in.TokenCacheFilename, credentialplugin.TokenCache{
+			IDToken:      out.IDToken,
+			RefreshToken: out.RefreshToken,
+		}); err != nil {
+			return xerrors.Errorf("could not write the token cache: %w", err)
+		}
+	}
+
+	if err := u.Interaction.Write(credentialplugin.Output{Token: out.IDToken, Expiry: out.IDTokenExpiry}); err != nil {
+		return xerrors.Errorf("could not write a credential object: %w", err)
+	}
+	return nil
+}

usecases/credentialplugin/get_token_test.go

@@ -0,0 +1,167 @@
+package credentialplugin
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/adaptors/mock_adaptors"
+	"github.com/int128/kubelogin/models/credentialplugin"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"github.com/int128/kubelogin/usecases"
+	"github.com/int128/kubelogin/usecases/mock_usecases"
+	"golang.org/x/xerrors"
+)
+
+func TestGetToken_Do(t *testing.T) {
+	dummyTokenClaims := map[string]string{"sub": "YOUR_SUBJECT"}
+	futureTime := time.Now().Add(time.Hour) //TODO: inject time service
+
+	t.Run("FullOptions", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.GetTokenIn{
+			IssuerURL:          "https://accounts.google.com",
+			ClientID:           "YOUR_CLIENT_ID",
+			ClientSecret:       "YOUR_CLIENT_SECRET",
+			TokenCacheFilename: "/path/to/token-cache",
+			ListenPort:         []int{10000},
+			SkipOpenBrowser:    true,
+			Username:           "USER",
+			Password:           "PASS",
+			CACertFilename:     "/path/to/cert",
+			SkipTLSVerify:      true,
+		}
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{
+				OIDCConfig: kubeconfig.OIDCConfig{
+					IDPIssuerURL: "https://accounts.google.com",
+					ClientID:     "YOUR_CLIENT_ID",
+					ClientSecret: "YOUR_CLIENT_SECRET",
+				},
+				ListenPort:      []int{10000},
+				SkipOpenBrowser: true,
+				Username:        "USER",
+				Password:        "PASS",
+				CACertFilename:  "/path/to/cert",
+				SkipTLSVerify:   true,
+			}).
+			Return(&usecases.AuthenticationOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		tokenCacheRepository := mock_adaptors.NewMockTokenCacheRepository(ctrl)
+		tokenCacheRepository.EXPECT().
+			Read("/path/to/token-cache").
+			Return(nil, xerrors.New("file not found"))
+		tokenCacheRepository.EXPECT().
+			Write("/path/to/token-cache", credentialplugin.TokenCache{
+				IDToken:      "YOUR_ID_TOKEN",
+				RefreshToken: "YOUR_REFRESH_TOKEN",
+			})
+		credentialPluginInteraction := mock_adaptors.NewMockCredentialPluginInteraction(ctrl)
+		credentialPluginInteraction.EXPECT().
+			Write(credentialplugin.Output{
+				Token:  "YOUR_ID_TOKEN",
+				Expiry: futureTime,
+			})
+		u := GetToken{
+			Authentication:       mockAuthentication,
+			TokenCacheRepository: tokenCacheRepository,
+			Interaction:          credentialPluginInteraction,
+			Logger:               mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+	})
+
+	t.Run("HasValidIDToken", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.GetTokenIn{
+			IssuerURL:          "https://accounts.google.com",
+			ClientID:           "YOUR_CLIENT_ID",
+			ClientSecret:       "YOUR_CLIENT_SECRET",
+			TokenCacheFilename: "/path/to/token-cache",
+		}
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{
+				OIDCConfig: kubeconfig.OIDCConfig{
+					IDPIssuerURL: "https://accounts.google.com",
+					ClientID:     "YOUR_CLIENT_ID",
+					ClientSecret: "YOUR_CLIENT_SECRET",
+					IDToken:      "VALID_ID_TOKEN",
+				},
+			}).
+			Return(&usecases.AuthenticationOut{
+				AlreadyHasValidIDToken: true,
+				IDToken:                "VALID_ID_TOKEN",
+				IDTokenExpiry:          futureTime,
+				IDTokenClaims:          dummyTokenClaims,
+			}, nil)
+		tokenCacheRepository := mock_adaptors.NewMockTokenCacheRepository(ctrl)
+		tokenCacheRepository.EXPECT().
+			Read("/path/to/token-cache").
+			Return(&credentialplugin.TokenCache{
+				IDToken: "VALID_ID_TOKEN",
+			}, nil)
+		credentialPluginInteraction := mock_adaptors.NewMockCredentialPluginInteraction(ctrl)
+		credentialPluginInteraction.EXPECT().
+			Write(credentialplugin.Output{
+				Token:  "VALID_ID_TOKEN",
+				Expiry: futureTime,
+			})
+		u := GetToken{
+			Authentication:       mockAuthentication,
+			TokenCacheRepository: tokenCacheRepository,
+			Interaction:          credentialPluginInteraction,
+			Logger:               mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+	})
+
+	t.Run("AuthenticationError", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.GetTokenIn{
+			IssuerURL:          "https://accounts.google.com",
+			ClientID:           "YOUR_CLIENT_ID",
+			ClientSecret:       "YOUR_CLIENT_SECRET",
+			TokenCacheFilename: "/path/to/token-cache",
+		}
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{
+				OIDCConfig: kubeconfig.OIDCConfig{
+					IDPIssuerURL: "https://accounts.google.com",
+					ClientID:     "YOUR_CLIENT_ID",
+					ClientSecret: "YOUR_CLIENT_SECRET",
+				},
+			}).
+			Return(nil, xerrors.New("authentication error"))
+		tokenCacheRepository := mock_adaptors.NewMockTokenCacheRepository(ctrl)
+		tokenCacheRepository.EXPECT().
+			Read("/path/to/token-cache").
+			Return(nil, xerrors.New("file not found"))
+		u := GetToken{
+			Authentication:       mockAuthentication,
+			TokenCacheRepository: tokenCacheRepository,
+			Interaction:          mock_adaptors.NewMockCredentialPluginInteraction(ctrl),
+			Logger:               mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err == nil {
+			t.Errorf("err wants non-nil but nil")
+		}
+	})
+}

usecases/interfaces.go

@@ -0,0 +1,76 @@
+package usecases
+
+import (
+	"context"
+	"time"
+
+	"github.com/int128/kubelogin/models/kubeconfig"
+)
+
+//go:generate mockgen -destination mock_usecases/mock_usecases.go github.com/int128/kubelogin/usecases Login,GetToken,Authentication
+
+type Login interface {
+	Do(ctx context.Context, in LoginIn) error
+}
+
+// LoginIn represents an input DTO of the Login use-case.
+type LoginIn struct {
+	KubeconfigFilename string                 // Default to the environment variable or global config as kubectl
+	KubeconfigContext  kubeconfig.ContextName // Default to the current context but ignored if KubeconfigUser is set
+	KubeconfigUser     kubeconfig.UserName    // Default to the user of the context
+	SkipOpenBrowser    bool
+	ListenPort         []int
+	Username           string // If set, perform the resource owner password credentials grant
+	Password           string // If empty, read a password using Env.ReadPassword()
+	CACertFilename     string // If set, use the CA cert
+	SkipTLSVerify      bool
+}
+
+// LoginShowLocalServerURL provides an interface to notify the URL of local server.
+// It is needed for the end-to-end tests.
+type LoginShowLocalServerURL interface {
+	ShowLocalServerURL(url string)
+}
+
+type GetToken interface {
+	Do(ctx context.Context, in GetTokenIn) error
+}
+
+// GetTokenIn represents an input DTO of the GetToken use-case.
+type GetTokenIn struct {
+	IssuerURL          string
+	ClientID           string
+	ClientSecret       string
+	ExtraScopes        []string // optional
+	SkipOpenBrowser    bool
+	ListenPort         []int
+	Username           string // If set, perform the resource owner password credentials grant
+	Password           string // If empty, read a password using Env.ReadPassword()
+	CACertFilename     string // If set, use the CA cert
+	SkipTLSVerify      bool
+	TokenCacheFilename string
+}
+
+type Authentication interface {
+	Do(ctx context.Context, in AuthenticationIn) (*AuthenticationOut, error)
+}
+
+// AuthenticationIn represents an input DTO of the Authentication use-case.
+type AuthenticationIn struct {
+	OIDCConfig      kubeconfig.OIDCConfig
+	SkipOpenBrowser bool
+	ListenPort      []int
+	Username        string // If set, perform the resource owner password credentials grant
+	Password        string // If empty, read a password using Env.ReadPassword()
+	CACertFilename  string // If set, use the CA cert
+	SkipTLSVerify   bool
+}
+
+// AuthenticationIn represents an output DTO of the Authentication use-case.
+type AuthenticationOut struct {
+	AlreadyHasValidIDToken bool
+	IDTokenExpiry          time.Time
+	IDTokenClaims          map[string]string
+	IDToken                string
+	RefreshToken           string
+}

usecases/interfaces/usecases.go

@@ -1,16 +0,0 @@
-package usecases
-
-import "context"
-
-//go:generate mockgen -package mock_usecases -destination ../mock_usecases/mock_usecases.go github.com/int128/kubelogin/usecases/interfaces Login
-
-type Login interface {
-	Do(ctx context.Context, in LoginIn) error
-}
-
-type LoginIn struct {
-	KubeConfig      string
-	SkipTLSVerify   bool
-	SkipOpenBrowser bool
-	ListenPort      int
-}

usecases/login.go

@@ -1,123 +0,0 @@
-package usecases
-
-import (
-	"context"
-
-	"github.com/coreos/go-oidc"
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/kubeconfig"
-	"github.com/int128/kubelogin/usecases/interfaces"
-	"github.com/pkg/errors"
-	"go.uber.org/dig"
-)
-
-const oidcConfigErrorMessage = `No OIDC configuration found. Did you setup kubectl for OIDC authentication?
-  kubectl config set-credentials %[1]s \
-    --auth-provider oidc \
-    --auth-provider-arg idp-issuer-url=https://issuer.example.com \
-    --auth-provider-arg client-id=YOUR_CLIENT_ID \
-    --auth-provider-arg client-secret=YOUR_CLIENT_SECRET`
-
-func NewLogin(i Login) usecases.Login {
-	return &i
-}
-
-type Login struct {
-	dig.In
-	KubeConfig adaptors.KubeConfig
-	HTTP       adaptors.HTTP
-	OIDC       adaptors.OIDC
-	Logger     adaptors.Logger
-}
-
-func (u *Login) Do(ctx context.Context, in usecases.LoginIn) error {
-	u.Logger.Debugf(1, "WARNING: Log may contain your secrets, e.g. token or password")
-
-	u.Logger.Debugf(1, "Loading %s", in.KubeConfig)
-	cfg, err := u.KubeConfig.LoadFromFile(in.KubeConfig)
-	if err != nil {
-		return errors.Wrapf(err, "could not read the kubeconfig")
-	}
-
-	u.Logger.Printf("Using current-context: %s", cfg.CurrentContext)
-	authProvider, err := kubeconfig.FindOIDCAuthProvider(cfg)
-	if err != nil {
-		u.Logger.Printf(oidcConfigErrorMessage, cfg.CurrentContext)
-		return errors.Wrapf(err, "could not find an oidc auth-provider in the kubeconfig")
-	}
-
-	clientConfig := u.HTTP.NewClientConfig()
-	clientConfig.SetSkipTLSVerify(in.SkipTLSVerify)
-	if authProvider.IDPCertificateAuthority() != "" {
-		filename := authProvider.IDPCertificateAuthority()
-		u.Logger.Printf("Using the certificate %s", filename)
-		if err := clientConfig.AddCertificateFromFile(filename); err != nil {
-			u.Logger.Printf("Skip the certificate %s: %s", filename, err)
-		}
-	}
-	if authProvider.IDPCertificateAuthorityData() != "" {
-		encoded := authProvider.IDPCertificateAuthorityData()
-		u.Logger.Printf("Using the certificate of idp-certificate-authority-data")
-		if err := clientConfig.AddEncodedCertificate(encoded); err != nil {
-			u.Logger.Printf("Skip the certificate of idp-certificate-authority-data: %s", err)
-		}
-	}
-	hc, err := u.HTTP.NewClient(clientConfig)
-	if err != nil {
-		return errors.Wrapf(err, "could not create a HTTP client")
-	}
-
-	if token := u.verifyIDToken(ctx, adaptors.OIDCVerifyTokenIn{
-		IDToken:  authProvider.IDToken(),
-		Issuer:   authProvider.IDPIssuerURL(),
-		ClientID: authProvider.ClientID(),
-		Client:   hc,
-	}); token != nil {
-		u.Logger.Printf("You already have a valid token (until %s)", token.Expiry)
-		return nil
-	}
-
-	out, err := u.OIDC.Authenticate(ctx,
-		adaptors.OIDCAuthenticateIn{
-			Issuer:          authProvider.IDPIssuerURL(),
-			ClientID:        authProvider.ClientID(),
-			ClientSecret:    authProvider.ClientSecret(),
-			ExtraScopes:     authProvider.ExtraScopes(),
-			Client:          hc,
-			LocalServerPort: in.ListenPort,
-			SkipOpenBrowser: in.SkipOpenBrowser,
-		},
-		adaptors.OIDCAuthenticateCallback{
-			ShowLocalServerURL: func(url string) {
-				u.Logger.Printf("Open %s for authentication", url)
-			},
-		})
-	if err != nil {
-		return errors.Wrapf(err, "could not get token from OIDC provider")
-	}
-
-	u.Logger.Printf("Got a token for subject %s (valid until %s)", out.VerifiedIDToken.Subject, out.VerifiedIDToken.Expiry)
-	u.Logger.Debugf(1, "Got an ID token %+v", out.VerifiedIDToken)
-	authProvider.SetIDToken(out.IDToken)
-	authProvider.SetRefreshToken(out.RefreshToken)
-
-	u.Logger.Debugf(1, "Writing the ID token and refresh token to %s", in.KubeConfig)
-	if err := u.KubeConfig.WriteToFile(cfg, in.KubeConfig); err != nil {
-		return errors.Wrapf(err, "could not update the kubeconfig")
-	}
-	u.Logger.Printf("Updated %s", in.KubeConfig)
-	return nil
-}
-
-func (u *Login) verifyIDToken(ctx context.Context, in adaptors.OIDCVerifyTokenIn) *oidc.IDToken {
-	if in.IDToken == "" {
-		return nil
-	}
-	token, err := u.OIDC.VerifyIDToken(ctx, in)
-	if err != nil {
-		u.Logger.Debugf(1, "Could not verify the ID token in the kubeconfig: %s", err)
-		return nil
-	}
-	u.Logger.Debugf(1, "Verified token %+v", token)
-	return token
-}

usecases/login/login.go

@@ -0,0 +1,76 @@
+package login
+
+import (
+	"context"
+
+	"github.com/google/wire"
+	"github.com/int128/kubelogin/adaptors"
+	"github.com/int128/kubelogin/usecases"
+	"golang.org/x/xerrors"
+)
+
+// Set provides the use-cases of logging in.
+var Set = wire.NewSet(
+	wire.Struct(new(Login), "*"),
+	wire.Bind(new(usecases.Login), new(*Login)),
+)
+
+const oidcConfigErrorMessage = `No OIDC configuration found. Did you setup kubectl for OIDC authentication?
+  kubectl config set-credentials CONTEXT_NAME \
+    --auth-provider oidc \
+    --auth-provider-arg idp-issuer-url=https://issuer.example.com \
+    --auth-provider-arg client-id=YOUR_CLIENT_ID \
+    --auth-provider-arg client-secret=YOUR_CLIENT_SECRET`
+
+// Login provides the use case of explicit login.
+//
+// If the current auth provider is not oidc, show the error.
+// If the kubeconfig has a valid token, do nothing.
+// Otherwise, update the kubeconfig.
+//
+type Login struct {
+	Authentication usecases.Authentication
+	Kubeconfig     adaptors.Kubeconfig
+	Logger         adaptors.Logger
+}
+
+func (u *Login) Do(ctx context.Context, in usecases.LoginIn) error {
+	u.Logger.Debugf(1, "WARNING: log may contain your secrets such as token or password")
+
+	authProvider, err := u.Kubeconfig.GetCurrentAuthProvider(in.KubeconfigFilename, in.KubeconfigContext, in.KubeconfigUser)
+	if err != nil {
+		u.Logger.Printf(oidcConfigErrorMessage)
+		return xerrors.Errorf("could not find the current authentication provider: %w", err)
+	}
+	u.Logger.Debugf(1, "Using the authentication provider of the user %s", authProvider.UserName)
+	u.Logger.Debugf(1, "A token will be written to %s", authProvider.LocationOfOrigin)
+
+	out, err := u.Authentication.Do(ctx, usecases.AuthenticationIn{
+		OIDCConfig:      authProvider.OIDCConfig,
+		SkipOpenBrowser: in.SkipOpenBrowser,
+		ListenPort:      in.ListenPort,
+		Username:        in.Username,
+		Password:        in.Password,
+		CACertFilename:  in.CACertFilename,
+		SkipTLSVerify:   in.SkipTLSVerify,
+	})
+	if err != nil {
+		return xerrors.Errorf("error while authentication: %w", err)
+	}
+	for k, v := range out.IDTokenClaims {
+		u.Logger.Debugf(1, "ID token has the claim: %s=%v", k, v)
+	}
+	if out.AlreadyHasValidIDToken {
+		u.Logger.Printf("You already have a valid token until %s", out.IDTokenExpiry)
+		return nil
+	}
+
+	u.Logger.Printf("You got a valid token until %s", out.IDTokenExpiry)
+	authProvider.OIDCConfig.IDToken = out.IDToken
+	authProvider.OIDCConfig.RefreshToken = out.RefreshToken
+	u.Logger.Debugf(1, "Writing the ID token and refresh token to %s", authProvider.LocationOfOrigin)
+	if err := u.Kubeconfig.UpdateAuthProvider(authProvider); err != nil {
+		return xerrors.Errorf("could not write the token to the kubeconfig: %w", err)
+	}
+	return nil
+}

usecases/login/login_test.go

@@ -0,0 +1,225 @@
+package login
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/golang/mock/gomock"
+	"github.com/int128/kubelogin/adaptors/mock_adaptors"
+	"github.com/int128/kubelogin/models/kubeconfig"
+	"github.com/int128/kubelogin/usecases"
+	"github.com/int128/kubelogin/usecases/mock_usecases"
+	"golang.org/x/xerrors"
+)
+
+func TestLogin_Do(t *testing.T) {
+	dummyTokenClaims := map[string]string{"sub": "YOUR_SUBJECT"}
+	futureTime := time.Now().Add(time.Hour) //TODO: inject time service
+
+	t.Run("FullOptions", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.LoginIn{
+			KubeconfigFilename: "/path/to/kubeconfig",
+			KubeconfigContext:  "theContext",
+			KubeconfigUser:     "theUser",
+			ListenPort:         []int{10000},
+			SkipOpenBrowser:    true,
+			Username:           "USER",
+			Password:           "PASS",
+			CACertFilename:     "/path/to/cert",
+			SkipTLSVerify:      true,
+		}
+		currentAuthProvider := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "theUser",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockKubeconfig := mock_adaptors.NewMockKubeconfig(ctrl)
+		mockKubeconfig.EXPECT().
+			GetCurrentAuthProvider("/path/to/kubeconfig", kubeconfig.ContextName("theContext"), kubeconfig.UserName("theUser")).
+			Return(currentAuthProvider, nil)
+		mockKubeconfig.EXPECT().
+			UpdateAuthProvider(&kubeconfig.AuthProvider{
+				LocationOfOrigin: "/path/to/kubeconfig",
+				UserName:         "theUser",
+				OIDCConfig: kubeconfig.OIDCConfig{
+					IDPIssuerURL: "https://accounts.google.com",
+					ClientID:     "YOUR_CLIENT_ID",
+					ClientSecret: "YOUR_CLIENT_SECRET",
+					IDToken:      "YOUR_ID_TOKEN",
+					RefreshToken: "YOUR_REFRESH_TOKEN",
+				},
+			})
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{
+				OIDCConfig:      currentAuthProvider.OIDCConfig,
+				ListenPort:      []int{10000},
+				SkipOpenBrowser: true,
+				Username:        "USER",
+				Password:        "PASS",
+				CACertFilename:  "/path/to/cert",
+				SkipTLSVerify:   true,
+			}).
+			Return(&usecases.AuthenticationOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		u := Login{
+			Authentication: mockAuthentication,
+			Kubeconfig:     mockKubeconfig,
+			Logger:         mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+	})
+
+	t.Run("HasValidIDToken", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.LoginIn{}
+		currentAuthProvider := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "theUser",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+				IDToken:      "VALID_ID_TOKEN",
+			},
+		}
+		mockKubeconfig := mock_adaptors.NewMockKubeconfig(ctrl)
+		mockKubeconfig.EXPECT().
+			GetCurrentAuthProvider("", kubeconfig.ContextName(""), kubeconfig.UserName("")).
+			Return(currentAuthProvider, nil)
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{OIDCConfig: currentAuthProvider.OIDCConfig}).
+			Return(&usecases.AuthenticationOut{
+				AlreadyHasValidIDToken: true,
+				IDToken:                "VALID_ID_TOKEN",
+				IDTokenExpiry:          futureTime,
+				IDTokenClaims:          dummyTokenClaims,
+			}, nil)
+		u := Login{
+			Authentication: mockAuthentication,
+			Kubeconfig:     mockKubeconfig,
+			Logger:         mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err != nil {
+			t.Errorf("Do returned error: %+v", err)
+		}
+	})
+
+	t.Run("NoOIDCConfig", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.LoginIn{}
+		mockKubeconfig := mock_adaptors.NewMockKubeconfig(ctrl)
+		mockKubeconfig.EXPECT().
+			GetCurrentAuthProvider("", kubeconfig.ContextName(""), kubeconfig.UserName("")).
+			Return(nil, xerrors.New("no oidc config"))
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		u := Login{
+			Authentication: mockAuthentication,
+			Kubeconfig:     mockKubeconfig,
+			Logger:         mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err == nil {
+			t.Errorf("err wants non-nil but nil")
+		}
+	})
+
+	t.Run("AuthenticationError", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.LoginIn{}
+		currentAuthProvider := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "google",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockKubeconfig := mock_adaptors.NewMockKubeconfig(ctrl)
+		mockKubeconfig.EXPECT().
+			GetCurrentAuthProvider("", kubeconfig.ContextName(""), kubeconfig.UserName("")).
+			Return(currentAuthProvider, nil)
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{OIDCConfig: currentAuthProvider.OIDCConfig}).
+			Return(nil, xerrors.New("authentication error"))
+		u := Login{
+			Authentication: mockAuthentication,
+			Kubeconfig:     mockKubeconfig,
+			Logger:         mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err == nil {
+			t.Errorf("err wants non-nil but nil")
+		}
+	})
+
+	t.Run("WriteError", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ctx := context.TODO()
+		in := usecases.LoginIn{}
+		currentAuthProvider := &kubeconfig.AuthProvider{
+			LocationOfOrigin: "/path/to/kubeconfig",
+			UserName:         "google",
+			OIDCConfig: kubeconfig.OIDCConfig{
+				IDPIssuerURL: "https://accounts.google.com",
+				ClientID:     "YOUR_CLIENT_ID",
+				ClientSecret: "YOUR_CLIENT_SECRET",
+			},
+		}
+		mockKubeconfig := mock_adaptors.NewMockKubeconfig(ctrl)
+		mockKubeconfig.EXPECT().
+			GetCurrentAuthProvider("", kubeconfig.ContextName(""), kubeconfig.UserName("")).
+			Return(currentAuthProvider, nil)
+		mockKubeconfig.EXPECT().
+			UpdateAuthProvider(&kubeconfig.AuthProvider{
+				LocationOfOrigin: "/path/to/kubeconfig",
+				UserName:         "google",
+				OIDCConfig: kubeconfig.OIDCConfig{
+					IDPIssuerURL: "https://accounts.google.com",
+					ClientID:     "YOUR_CLIENT_ID",
+					ClientSecret: "YOUR_CLIENT_SECRET",
+					IDToken:      "YOUR_ID_TOKEN",
+					RefreshToken: "YOUR_REFRESH_TOKEN",
+				},
+			}).
+			Return(xerrors.New("I/O error"))
+		mockAuthentication := mock_usecases.NewMockAuthentication(ctrl)
+		mockAuthentication.EXPECT().
+			Do(ctx, usecases.AuthenticationIn{OIDCConfig: currentAuthProvider.OIDCConfig}).
+			Return(&usecases.AuthenticationOut{
+				IDToken:       "YOUR_ID_TOKEN",
+				RefreshToken:  "YOUR_REFRESH_TOKEN",
+				IDTokenExpiry: futureTime,
+				IDTokenClaims: dummyTokenClaims,
+			}, nil)
+		u := Login{
+			Authentication: mockAuthentication,
+			Kubeconfig:     mockKubeconfig,
+			Logger:         mock_adaptors.NewLogger(t, ctrl),
+		}
+		if err := u.Do(ctx, in); err == nil {
+			t.Errorf("err wants non-nil but nil")
+		}
+	})
+}

usecases/login_test.go

@@ -1,521 +0,0 @@
-package usecases
-
-import (
-	"context"
-	"net/http"
-	"testing"
-
-	"github.com/coreos/go-oidc"
-	"github.com/golang/mock/gomock"
-	"github.com/int128/kubelogin/adaptors/interfaces"
-	"github.com/int128/kubelogin/adaptors/mock_adaptors"
-	"github.com/int128/kubelogin/usecases/interfaces"
-	"github.com/pkg/errors"
-	"k8s.io/client-go/tools/clientcmd/api"
-)
-
-func TestLogin_Do(t *testing.T) {
-	httpClient := &http.Client{}
-
-	newMockKubeConfig := func(ctrl *gomock.Controller, in *api.Config, out *api.Config) adaptors.KubeConfig {
-		kubeConfig := mock_adaptors.NewMockKubeConfig(ctrl)
-		kubeConfig.EXPECT().
-			LoadFromFile("/path/to/kubeconfig").
-			Return(in, nil)
-		kubeConfig.EXPECT().
-			WriteToFile(out, "/path/to/kubeconfig")
-		return kubeConfig
-	}
-
-	newMockHTTP := func(ctrl *gomock.Controller, config adaptors.HTTPClientConfig) adaptors.HTTP {
-		mockHTTP := mock_adaptors.NewMockHTTP(ctrl)
-		mockHTTP.EXPECT().
-			NewClientConfig().
-			Return(config)
-		mockHTTP.EXPECT().
-			NewClient(config).
-			Return(httpClient, nil)
-		return mockHTTP
-	}
-
-	newInConfig := func() *api.Config {
-		return &api.Config{
-			APIVersion:     "v1",
-			CurrentContext: "default",
-			Contexts: map[string]*api.Context{
-				"default": {
-					AuthInfo: "google",
-					Cluster:  "example.k8s.local",
-				},
-			},
-			AuthInfos: map[string]*api.AuthInfo{
-				"google": {
-					AuthProvider: &api.AuthProviderConfig{
-						Name: "oidc",
-						Config: map[string]string{
-							"client-id":      "YOUR_CLIENT_ID",
-							"client-secret":  "YOUR_CLIENT_SECRET",
-							"idp-issuer-url": "https://accounts.google.com",
-						},
-					},
-				},
-			},
-		}
-	}
-
-	newOutConfig := func(in *api.Config) *api.Config {
-		config := in.DeepCopy()
-		config.AuthInfos["google"].AuthProvider.Config["id-token"] = "YOUR_ID_TOKEN"
-		config.AuthInfos["google"].AuthProvider.Config["refresh-token"] = "YOUR_REFRESH_TOKEN"
-		return config
-	}
-
-	t.Run("Defaults", func(t *testing.T) {
-		inConfig := newInConfig()
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Do(func(_ context.Context, _ adaptors.OIDCAuthenticateIn, cb adaptors.OIDCAuthenticateCallback) {
-				cb.ShowLocalServerURL("http://localhost:10000")
-			}).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("SkipTLSVerify", func(t *testing.T) {
-		inConfig := newInConfig()
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(true)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig:    "/path/to/kubeconfig",
-			ListenPort:    10000,
-			SkipTLSVerify: true,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("SkipOpenBrowser", func(t *testing.T) {
-		inConfig := newInConfig()
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-				SkipOpenBrowser: true,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig:      "/path/to/kubeconfig",
-			ListenPort:      10000,
-			SkipOpenBrowser: true,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/ValidToken", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["id-token"] = "VALID"
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		kubeConfig := mock_adaptors.NewMockKubeConfig(ctrl)
-		kubeConfig.EXPECT().
-			LoadFromFile("/path/to/kubeconfig").
-			Return(inConfig, nil)
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			VerifyIDToken(ctx, adaptors.OIDCVerifyTokenIn{
-				IDToken:  "VALID",
-				Issuer:   "https://accounts.google.com",
-				ClientID: "YOUR_CLIENT_ID",
-				Client:   httpClient,
-			}).
-			Return(&oidc.IDToken{}, nil)
-
-		u := Login{
-			KubeConfig: kubeConfig,
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/InvalidToken", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["id-token"] = "EXPIRED"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			VerifyIDToken(ctx, adaptors.OIDCVerifyTokenIn{
-				IDToken:  "EXPIRED",
-				Issuer:   "https://accounts.google.com",
-				ClientID: "YOUR_CLIENT_ID",
-				Client:   httpClient,
-			}).
-			Return(nil, errors.New("token is expired"))
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/extra-scopes", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["extra-scopes"] = "email,profile"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{"email", "profile"},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/idp-certificate-authority", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["idp-certificate-authority"] = "/path/to/cert"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-		httpClientConfig.EXPECT().
-			AddCertificateFromFile("/path/to/cert")
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/idp-certificate-authority/error", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["idp-certificate-authority"] = "/path/to/cert"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-		httpClientConfig.EXPECT().
-			AddCertificateFromFile("/path/to/cert").
-			Return(errors.New("not found"))
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/idp-certificate-authority-data", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["idp-certificate-authority-data"] = "base64encoded"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-		httpClientConfig.EXPECT().
-			AddEncodedCertificate("base64encoded")
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-
-	t.Run("KubeConfig/idp-certificate-authority-data/error", func(t *testing.T) {
-		inConfig := newInConfig()
-		inConfig.AuthInfos["google"].AuthProvider.Config["idp-certificate-authority-data"] = "base64encoded"
-		outConfig := newOutConfig(inConfig)
-
-		ctrl := gomock.NewController(t)
-		defer ctrl.Finish()
-		ctx := context.TODO()
-
-		httpClientConfig := mock_adaptors.NewMockHTTPClientConfig(ctrl)
-		httpClientConfig.EXPECT().
-			SetSkipTLSVerify(false)
-		httpClientConfig.EXPECT().
-			AddEncodedCertificate("base64encoded").
-			Return(errors.New("invalid"))
-
-		mockOIDC := mock_adaptors.NewMockOIDC(ctrl)
-		mockOIDC.EXPECT().
-			Authenticate(ctx, adaptors.OIDCAuthenticateIn{
-				Issuer:          "https://accounts.google.com",
-				ClientID:        "YOUR_CLIENT_ID",
-				ClientSecret:    "YOUR_CLIENT_SECRET",
-				ExtraScopes:     []string{},
-				LocalServerPort: 10000,
-				Client:          httpClient,
-			}, gomock.Any()).
-			Return(&adaptors.OIDCAuthenticateOut{
-				VerifiedIDToken: &oidc.IDToken{Subject: "SUBJECT"},
-				IDToken:         "YOUR_ID_TOKEN",
-				RefreshToken:    "YOUR_REFRESH_TOKEN",
-			}, nil)
-
-		u := Login{
-			KubeConfig: newMockKubeConfig(ctrl, inConfig, outConfig),
-			HTTP:       newMockHTTP(ctrl, httpClientConfig),
-			OIDC:       mockOIDC,
-			Logger:     mock_adaptors.NewLogger(t, ctrl),
-		}
-		if err := u.Do(ctx, usecases.LoginIn{
-			KubeConfig: "/path/to/kubeconfig",
-			ListenPort: 10000,
-		}); err != nil {
-			t.Errorf("Do returned error: %+v", err)
-		}
-	})
-}

usecases/mock_usecases/mock_usecases.go

@@ -1,5 +1,5 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/int128/kubelogin/usecases/interfaces (interfaces: Login)
+// Source: github.com/int128/kubelogin/usecases (interfaces: Login,GetToken,Authentication)
 
 // Package mock_usecases is a generated GoMock package.
 package mock_usecases
@@ -7,7 +7,7 @@ package mock_usecases
 import (
 	context "context"
 	gomock "github.com/golang/mock/gomock"
-	interfaces "github.com/int128/kubelogin/usecases/interfaces"
+	usecases "github.com/int128/kubelogin/usecases"
 	reflect "reflect"
 )
 
@@ -35,7 +35,7 @@ func (m *MockLogin) EXPECT() *MockLoginMockRecorder {
 }
 
 // Do mocks base method
-func (m *MockLogin) Do(arg0 context.Context, arg1 interfaces.LoginIn) error {
+func (m *MockLogin) Do(arg0 context.Context, arg1 usecases.LoginIn) error {
 	ret := m.ctrl.Call(m, "Do", arg0, arg1)
 	ret0, _ := ret[0].(error)
 	return ret0
@@ -45,3 +45,74 @@ func (m *MockLogin) Do(arg0 context.Context, arg1 interfaces.LoginIn) error {
 func (mr *MockLoginMockRecorder) Do(arg0, arg1 interface{}) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Do", reflect.TypeOf((*MockLogin)(nil).Do), arg0, arg1)
 }
+
+// MockGetToken is a mock of GetToken interface
+type MockGetToken struct {
+	ctrl     *gomock.Controller
+	recorder *MockGetTokenMockRecorder
+}
+
+// MockGetTokenMockRecorder is the mock recorder for MockGetToken
+type MockGetTokenMockRecorder struct {
+	mock *MockGetToken
+}
+
+// NewMockGetToken creates a new mock instance
+func NewMockGetToken(ctrl *gomock.Controller) *MockGetToken {
+	mock := &MockGetToken{ctrl: ctrl}
+	mock.recorder = &MockGetTokenMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockGetToken) EXPECT() *MockGetTokenMockRecorder {
+	return m.recorder
+}
+
+// Do mocks base method
+func (m *MockGetToken) Do(arg0 context.Context, arg1 usecases.GetTokenIn) error {
+	ret := m.ctrl.Call(m, "Do", arg0, arg1)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Do indicates an expected call of Do
+func (mr *MockGetTokenMockRecorder) Do(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Do", reflect.TypeOf((*MockGetToken)(nil).Do), arg0, arg1)
+}
+
+// MockAuthentication is a mock of Authentication interface
+type MockAuthentication struct {
+	ctrl     *gomock.Controller
+	recorder *MockAuthenticationMockRecorder
+}
+
+// MockAuthenticationMockRecorder is the mock recorder for MockAuthentication
+type MockAuthenticationMockRecorder struct {
+	mock *MockAuthentication
+}
+
+// NewMockAuthentication creates a new mock instance
+func NewMockAuthentication(ctrl *gomock.Controller) *MockAuthentication {
+	mock := &MockAuthentication{ctrl: ctrl}
+	mock.recorder = &MockAuthenticationMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockAuthentication) EXPECT() *MockAuthenticationMockRecorder {
+	return m.recorder
+}
+
+// Do mocks base method
+func (m *MockAuthentication) Do(arg0 context.Context, arg1 usecases.AuthenticationIn) (*usecases.AuthenticationOut, error) {
+	ret := m.ctrl.Call(m, "Do", arg0, arg1)
+	ret0, _ := ret[0].(*usecases.AuthenticationOut)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Do indicates an expected call of Do
+func (mr *MockAuthenticationMockRecorder) Do(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Do", reflect.TypeOf((*MockAuthentication)(nil).Do), arg0, arg1)
+}