fix(server): revert the state & code_challenge validation

server/handlers/authorize.go

@@ -64,22 +64,55 @@ func AuthorizeHandler() gin.HandlerFunc {
 
 		if err := validateAuthorizeRequest(responseType, responseMode, clientID, state, codeChallenge); err != nil {
 			log.Debug("invalid authorization request: ", err)
-			gc.JSON(http.StatusBadRequest, gin.H{"error": err})
+			gc.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
 
+		log := log.WithFields(log.Fields{
+			"response_mode":  responseMode,
+			"response_type":  responseType,
+			"state":          state,
+			"code_challenge": codeChallenge,
+			"scope":          scope,
+			"redirect_uri":   redirectURI,
+		})
+
 		// used for response mode query or fragment
 		loginState := "state=" + state + "&scope=" + strings.Join(scope, " ") + "&redirect_uri=" + redirectURI
 		loginURL := "/app?" + loginState
+
 		if responseMode == constants.ResponseModeFragment {
 			loginURL = "/app#" + loginState
 		}
 
-		loginError := map[string]interface{}{
-			"error":             "login_required",
-			"error_description": "Login is required",
+		if state == "" {
+			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
+				"type": "authorization_response",
+				"response": map[string]interface{}{
+					"error":             "state_required",
+					"error_description": "state is required",
+				},
+			}, http.StatusOK)
+			return
 		}
 
+		if responseType == constants.ResponseTypeCode && codeChallenge == "" {
+			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
+				"type": "authorization_response",
+				"response": map[string]interface{}{
+					"error":             "code_challenge_required",
+					"error_description": "code challenge is required",
+				},
+			}, http.StatusOK)
+		}
+
+		loginError := map[string]interface{}{
+			"type": "authorization_response",
+			"response": map[string]interface{}{
+				"error":             "login_required",
+				"error_description": "Login is required",
+			},
+		}
 		sessionToken, err := cookie.GetSession(gc)
 		if err != nil {
 			log.Debug("GetSession failed: ", err)
@@ -94,13 +127,17 @@ func AuthorizeHandler() gin.HandlerFunc {
 			handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
 			return
 		}
+
 		userID := claims.Subject
 		user, err := db.Provider.GetUserByID(gc, userID)
 		if err != nil {
 			log.Debug("GetUserByID failed: ", err)
 			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
-				"error":             "signup_required",
-				"error_description": "Sign up required",
+				"type": "authorization_response",
+				"response": map[string]interface{}{
+					"error":             "signup_required",
+					"error_description": "Sign up required",
+				},
 			}, http.StatusOK)
 			return
 		}
@@ -137,30 +174,40 @@ func AuthorizeHandler() gin.HandlerFunc {
 
 			// in case, response type is code and user is already logged in send the code and state
 			// and cookie session will already be rolled over and set
-			if responseMode == constants.ResponseModeFormPost {
-				gc.HTML(http.StatusOK, authorizeFormPostTemplate, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"code":  code,
-							"state": state,
-						},
-					},
-				})
-			} else {
-				gc.HTML(http.StatusOK, authorizeWebMessageTemplate, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"code":  code,
-							"state": state,
-						},
-					},
-				})
+			// gc.HTML(http.StatusOK, authorizeWebMessageTemplate, gin.H{
+			// 	"target_origin": redirectURI,
+			// 	"authorization_response": map[string]interface{}{
+			// 		"type": "authorization_response",
+			// 		"response": map[string]string{
+			// 			"code":  code,
+			// 			"state": state,
+			// 		},
+			// 	},
+			// })
+
+			params := "code=" + code + "&state=" + state
+			if responseMode == constants.ResponseModeQuery {
+				if strings.Contains(redirectURI, "?") {
+					redirectURI = redirectURI + "&" + params
+				} else {
+					redirectURI = redirectURI + "?" + params
+				}
+			} else if responseMode == constants.ResponseModeFragment {
+				if strings.Contains(redirectURI, "#") {
+					redirectURI = redirectURI + "&" + params
+				} else {
+					redirectURI = redirectURI + "#" + params
+				}
 			}
 
+			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
+				"type": "authorization_response",
+				"response": map[string]interface{}{
+					"code":  code,
+					"state": state,
+				},
+			}, http.StatusOK)
+
 			return
 		}
 
@@ -244,27 +291,17 @@ func validateAuthorizeRequest(responseType, responseMode, clientID, state, codeC
 		return fmt.Errorf("invalid response mode %s. 'query', 'fragment', 'form_post' and 'web_message' are valid response_mode", responseMode)
 	}
 
-	if responseType == constants.ResponseTypeCode && strings.TrimSpace(codeChallenge) == "" {
-		return fmt.Errorf("code_challenge is required for %s '%s'", responseType, constants.ResponseTypeCode)
-	}
-
 	if client, err := memorystore.Provider.GetStringStoreEnvVariable(constants.EnvKeyClientID); client != clientID || err != nil {
 		return fmt.Errorf("invalid client_id %s", clientID)
 	}
 
-	if strings.TrimSpace(state) == "" {
-		return fmt.Errorf("state is required")
-	}
-
 	return nil
 }
 
 func handleResponse(gc *gin.Context, responseMode, loginURI, redirectURI string, data map[string]interface{}, httpStatusCode int) {
 	isAuthenticationRequired := false
-	if val, ok := data["error"]; ok {
-		if val == "login_required" || val == "signup_required" {
-			isAuthenticationRequired = true
-		}
+	if _, ok := data["response"].(map[string]interface{})["error"]; ok {
+		isAuthenticationRequired = true
 	}
 
 	switch responseMode {
@@ -284,7 +321,7 @@ func handleResponse(gc *gin.Context, responseMode, loginURI, redirectURI string,
 	case constants.ResponseModeFormPost:
 		gc.HTML(httpStatusCode, authorizeFormPostTemplate, gin.H{
 			"target_origin":          redirectURI,
-			"authorization_response": data,
+			"authorization_response": data["response"],
 		})
 		return
 	}

server/handlers/openid_config.go

@@ -20,7 +20,7 @@ func OpenIDConfigurationHandler() gin.HandlerFunc {
 			"token_endpoint":                        issuer + "/token",
 			"userinfo_endpoint":                     issuer + "/userinfo",
 			"jwks_uri":                              issuer + "/.well-known/jwks.json",
-			"response_types_supported":              []string{"code", "token", "id_token", "code token", "code id_token", "token id_token", "code token id_token"},
+			"response_types_supported":              []string{"code", "token", "id_token"},
 			"scopes_supported":                      []string{"openid", "email", "profile", "email_verified", "given_name", "family_name", "nick_name", "picture"},
 			"response_modes_supported":              []string{"query", "fragment", "form_post", "web_message"},
 			"id_token_signing_alg_values_supported": []string{jwtType},

templates/authorize_form_post.tmpl

@@ -4,9 +4,9 @@
 		<title>Authorization Response</title>
 	</head>
 	<body onload="document.forms['authorize_form_post'].submit()">
-        <form action={{.target_origin}} name="authorize_form_post">
+        <form action="{{.target_origin}}" name="authorize_form_post" method="POST">
             {{ range $key, $val := .authorization_response }}
-                <input type="hidden" key={{$key}} value={{$val}} name={{$key}} id={{$key}} />
+                <input type="hidden" key="{{$key}}" value="{{$val}}" name="{{$key}}" id="{{$key}}" />
             {{ end }}
         </form>
 	</body>