Setup notation signing keys

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.gitignore

@@ -23,3 +23,6 @@ bin/
 cue/cue.mod/gen/
 cue/go.mod
 cue/go.sum
+
+.notation/podinfo.csr
+.notation/podinfo.key

.notation/README.md

@@ -0,0 +1,15 @@
+# Podinfo signed releases
+
+Podinfo release assets such as the Helm chart and the Flux artifact
+are published to GitHub Container Registry and are signed with
+[Notation](https://github.com/notaryproject/notation).
+
+## Generate signing keys
+
+Generate a new signing key pair:
+
+```sh
+openssl genrsa -out podinfo.key 2048
+openssl req -new -key podinfo.key -out podinfo.csr -config codesign.cnf
+openssl x509 -req -days 1826 -in podinfo.csr -signkey podinfo.key -out notation.crt -extensions v3_req -extfile codesign.cnf
+```

.notation/codesign.cnf

@@ -0,0 +1,18 @@
+[ req ]
+default_bits           = 2048
+default_keyfile        = privatekey.pem
+distinguished_name     = req_distinguished_name
+req_extensions         = v3_req
+prompt                 = no
+
+[ req_distinguished_name ]
+C                      = RO
+ST                     = BU
+L                      = Bucharest
+O                      = Notary
+CN                     = stefanprodan.com
+
+[ v3_req ]
+keyUsage               = critical,digitalSignature
+extendedKeyUsage       = critical,codeSigning
+#subjectKeyIdentifier  = hash

.notation/notation.crt

@@ -1,20 +1,21 @@
 -----BEGIN CERTIFICATE-----
-MIIDWjCCAkKgAwIBAgIUBk/7TYVIUsiCeUm5c11abfwMrZUwDQYJKoZIhvcNAQEL
-BQAwUTELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAldBMRAwDgYDVQQHDAdTZWF0dGxl
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+m91USVqfeUX7ZzjDxPHE2A==
 -----END CERTIFICATE-----

.notation/signingkeys.json

@@ -1,8 +1,8 @@
 {
-    "default": "fluxcd.io",
+    "default": "stefanprodan.com",
     "keys": [
         {
-            "name": "fluxcd.io",
+            "name": "stefanprodan.com",
             "keyPath": "/home/runner/.config/notation/localkeys/notation.key",
             "certPath": "/home/runner/.config/notation/localkeys/notation.crt"
         }

.notation/trustpolicy.json

@@ -2,7 +2,7 @@
     "version": "1.0",
     "trustPolicies": [
         {
-            "name": "fluxcd.io",
+            "name": "stefanprodan.com",
             "registryScopes": [
                 "ghcr.io/stefanprodan/podinfo-deploy",
                 "ghcr.io/stefanprodan/charts/podinfo"
@@ -10,9 +10,9 @@
             "signatureVerification": {
                 "level" : "strict"
             },
-            "trustStores": [ "ca:fluxcd.io" ],
+            "trustStores": [ "ca:stefanprodan.com" ],
             "trustedIdentities": [
-                "x509.subject: C=US, ST=WA, L=Seattle, O=Notary, CN=fluxcd.io"
+                "x509.subject: C=RO, ST=BU, L=Bucharest, O=Notary, CN=stefanprodan.com"
             ]
         }
     ]