mirror of
https://github.com/nais/wonderwall.git
synced 2026-05-09 18:06:42 +00:00
117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
package router
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"time"
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log "github.com/sirupsen/logrus"
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"golang.org/x/oauth2"
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"github.com/nais/wonderwall/pkg/jwt"
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"github.com/nais/wonderwall/pkg/openid"
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)
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func (h *Handler) Callback(w http.ResponseWriter, r *http.Request) {
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loginCookie, err := h.getLoginCookie(r)
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if err != nil {
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msg := "callback: fetching login cookie"
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if errors.Is(err, http.ErrNoCookie) {
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msg += ": fallback cookie not found (user might have blocked all cookies, or the callback route was accessed before the login route)"
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}
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h.Unauthorized(w, r, fmt.Errorf("%s: %w", msg, err))
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return
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}
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params := r.URL.Query()
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if params.Get("error") != "" {
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oauthError := params.Get("error")
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oauthErrorDescription := params.Get("error_description")
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h.InternalError(w, r, fmt.Errorf("callback: error from identity provider: %s: %s", oauthError, oauthErrorDescription))
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return
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}
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if params.Get("state") != loginCookie.State {
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h.Unauthorized(w, r, fmt.Errorf("callback: state parameter mismatch (possible csrf)"))
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return
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}
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rawTokens, err := h.codeExchangeForToken(r.Context(), loginCookie, params.Get("code"))
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if err != nil {
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h.InternalError(w, r, fmt.Errorf("callback: exchanging code: %w", err))
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return
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}
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jwkSet, err := h.Provider.GetPublicJwkSet(r.Context())
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if err != nil {
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h.InternalError(w, r, fmt.Errorf("callback: getting jwks: %w", err))
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return
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}
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tokens, err := jwt.ParseOauth2Token(rawTokens, *jwkSet)
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if err != nil {
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// JWKS might not be up-to-date, so we'll want to force a refresh for the next attempt
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_, _ = h.Provider.RefreshPublicJwkSet(r.Context())
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h.InternalError(w, r, fmt.Errorf("callback: parsing tokens: %w", err))
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return
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}
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err = tokens.IDToken.Validate(h.Provider, loginCookie.Nonce)
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if err != nil {
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h.InternalError(w, r, fmt.Errorf("callback: validating id_token: %w", err))
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return
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}
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err = h.createSession(w, r, tokens, params)
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if err != nil {
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h.InternalError(w, r, fmt.Errorf("callback: creating session: %w", err))
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return
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}
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if h.Config.Loginstatus.Enabled {
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loginstatusToken, err := h.Loginstatus.ExchangeToken(r.Context(), tokens.AccessToken)
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if err != nil {
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h.InternalError(w, r, fmt.Errorf("callback: exchanging loginstatus token: %w", err))
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return
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}
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h.Loginstatus.SetCookie(w, loginstatusToken, h.CookieOptions)
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log.Info("callback: successfully fetched loginstatus token")
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}
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h.clearLoginCookies(w)
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logSuccessfulLogin(tokens, loginCookie.Referer)
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http.Redirect(w, r, loginCookie.Referer, http.StatusTemporaryRedirect)
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}
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func (h *Handler) codeExchangeForToken(ctx context.Context, loginCookie *openid.LoginCookie, code string) (*oauth2.Token, error) {
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clientAssertion, err := openid.ClientAssertion(h.Provider, time.Second*30)
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if err != nil {
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return nil, fmt.Errorf("creating client assertion: %w", err)
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}
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opts := []oauth2.AuthCodeOption{
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oauth2.SetAuthURLParam("code_verifier", loginCookie.CodeVerifier),
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oauth2.SetAuthURLParam("client_assertion", clientAssertion),
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oauth2.SetAuthURLParam("client_assertion_type", "urn:ietf:params:oauth:client-assertion-type:jwt-bearer"),
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}
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tokens, err := h.OauthConfig.Exchange(ctx, code, opts...)
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if err != nil {
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return nil, fmt.Errorf("exchanging code for token: %w", err)
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}
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return tokens, nil
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}
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func logSuccessfulLogin(tokens *jwt.Tokens, referer string) {
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fields := log.Fields{
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"redirect_to": referer,
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"claims": tokens.Claims(),
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}
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log.WithFields(fields).Info("callback: successful login")
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}
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