update token issuer to use RAWURLEncoding and return json coding to configuration as well

openid_config.go

@@ -41,6 +41,7 @@ func getOpenIDConfig() *OpenIDConfig {
 
 func (oidcConf *OpenIDConfig) openidConfigHandler() http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
 		encoder := json.NewEncoder(w)
 		encoder.Encode(oidcConf)
 	})

openid_jwks.go

@@ -16,7 +16,6 @@ type Key struct {
 	KType string `json:"kty"`
 	N     string `json:"n"`
 	E     string `json:"e"`
-	Key   string `json:"x5c"`
 }
 
 type JWKS struct {
@@ -39,9 +38,8 @@ func getJWKS() *JWKS {
 	e = make([]byte, 4)
 	binary.BigEndian.PutUint32(e, uint32(rsaKey.E))
 	key := Key{KType: "RSA",
-		Key: base64.URLEncoding.EncodeToString(keyBytes),
-		N:   base64.URLEncoding.EncodeToString(rsaKey.N.Bytes()),
-		E:   base64.URLEncoding.EncodeToString(e)}
+		N: base64.RawURLEncoding.EncodeToString(rsaKey.N.Bytes()),
+		E: base64.RawURLEncoding.EncodeToString(e)}
 
 	return &JWKS{Keys: []Key{key}}
 }