fix: form post template

server/constants/oauth2.go

@@ -0,0 +1,19 @@
+package constants
+
+const (
+	// - query: for Authorization Code grant. 302 Found triggers redirect.
+	ResponseModeQuery = "query"
+	// - fragment: for Implicit grant. 302 Found triggers redirect.
+	ResponseModeFragment = "fragment"
+	// - form_post: 200 OK with response parameters embedded in an HTML form as hidden parameters.
+	ResponseModeFormPost = "form_post"
+	// - web_message: For Silent Authentication. Uses HTML5 web messaging.
+	ResponseModeWebMessage = "web_message"
+
+	// For the Authorization Code grant, use response_type=code to include the authorization code.
+	ResponseTypeCode = "code"
+	// For the Implicit grant, use response_type=token to include an access token.
+	ResponseTypeToken = "token"
+	// For the Implicit grant of id_token, use response_type=id_token to include an identifier token.
+	ResponseTypeIDToken = "id_token"
+)

server/handlers/authorize.go

@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"fmt"
 	"net/http"
 	"strconv"
 	"strings"
@@ -26,6 +27,12 @@ import (
 // code_challenge_method = to prevent CSRF attack [only sh256 is supported]
 
 // check the flow for generating and verifying codes: https://developer.okta.com/blog/2019/08/22/okta-authjs-pkce#:~:text=PKCE%20works%20by%20having%20the,is%20called%20the%20Code%20Challenge.
+
+const (
+	authorizeWebMessageTemplate = "authorize_web_message.tmpl"
+	authorizeFormPostTemplate   = "authorize_form_post.tmpl"
+)
+
 func AuthorizeHandler() gin.HandlerFunc {
 	return func(gc *gin.Context) {
 		redirectURI := strings.TrimSpace(gc.Query("redirect_uri"))
@@ -34,7 +41,6 @@ func AuthorizeHandler() gin.HandlerFunc {
 		codeChallenge := strings.TrimSpace(gc.Query("code_challenge"))
 		scopeString := strings.TrimSpace(gc.Query("scope"))
 		clientID := strings.TrimSpace(gc.Query("client_id"))
-		template := "authorize.tmpl"
 		responseMode := strings.TrimSpace(gc.Query("response_mode"))
 
 		var scope []string
@@ -45,176 +51,73 @@ func AuthorizeHandler() gin.HandlerFunc {
 		}
 
 		if responseMode == "" {
-			responseMode = "query"
+			responseMode = constants.ResponseModeQuery
-		}
-
-		if responseMode != "query" && responseMode != "web_message" {
-			log.Debug("Invalid response_mode: ", responseMode)
-			gc.JSON(400, gin.H{"error": "invalid response mode"})
 		}
 
 		if redirectURI == "" {
 			redirectURI = "/app"
 		}
 
-		isQuery := responseMode == "query"
-
-		loginURL := "/app?state=" + state + "&scope=" + strings.Join(scope, " ") + "&redirect_uri=" + redirectURI
-
-		if clientID == "" {
-			if isQuery {
-				gc.Redirect(http.StatusFound, loginURL)
-			} else {
-				log.Debug("Failed to get client_id: ", clientID)
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error": "client_id is required",
-						},
-					},
-				})
-			}
-			return
-		}
-
-		if client, err := memorystore.Provider.GetStringStoreEnvVariable(constants.EnvKeyClientID); client != clientID || err != nil {
-			if isQuery {
-				gc.Redirect(http.StatusFound, loginURL)
-			} else {
-				log.Debug("Invalid client_id: ", clientID)
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error": "invalid_client_id",
-						},
-					},
-				})
-			}
-			return
-		}
-
-		if state == "" {
-			if isQuery {
-				gc.Redirect(http.StatusFound, loginURL)
-			} else {
-				log.Debug("Failed to get state: ", state)
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error": "state is required",
-						},
-					},
-				})
-			}
-			return
-		}
-
 		if responseType == "" {
 			responseType = "token"
 		}
 
-		isResponseTypeCode := responseType == "code"
+		if err := validateAuthorizeRequest(responseType, responseMode, clientID, state, codeChallenge); err != nil {
-		isResponseTypeToken := responseType == "token"
+			log.Debug("invalid authorization request: ", err)
-
+			gc.JSON(http.StatusBadRequest, gin.H{"error": err})
-		if !isResponseTypeCode && !isResponseTypeToken {
-			if isQuery {
-				gc.Redirect(http.StatusFound, loginURL)
-			} else {
-				log.Debug("Invalid response_type: ", responseType)
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error": "response_type is invalid",
-						},
-					},
-				})
-			}
 			return
 		}
 
-		if isResponseTypeCode {
+		log := log.WithFields(log.Fields{
-			if codeChallenge == "" {
+			"response_mode":  responseMode,
-				if isQuery {
+			"response_type":  responseType,
-					gc.Redirect(http.StatusFound, loginURL)
+			"state":          state,
-				} else {
+			"code_challenge": codeChallenge,
-					log.Debug("Failed to get code_challenge: ", codeChallenge)
+			"scope":          scope,
-					gc.HTML(http.StatusBadRequest, template, gin.H{
+			"redirect_uri":   redirectURI,
-						"target_origin": redirectURI,
+		})
-						"authorization_response": map[string]interface{}{
+
-							"type": "authorization_response",
+		// used for response mode query or fragment
-							"response": map[string]string{
+		loginState := "state=" + state + "&scope=" + strings.Join(scope, " ") + "&redirect_uri=" + redirectURI
-								"error": "code_challenge is required",
+		loginURL := "/app?" + loginState
-							},
+		if responseMode == constants.ResponseModeFragment {
-						},
+			loginURL = "/app#" + loginState
-					})
+		}
-				}
+
-				return
+		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 {
-			if isQuery {
+			log.Debug("GetSession failed: ", err)
-				gc.Redirect(http.StatusFound, loginURL)
+			handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-			} else {
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error":             "login_required",
-							"error_description": "Login is required",
-						},
-					},
-				})
-			}
 			return
 		}
 
 		// get session from cookie
 		claims, err := token.ValidateBrowserSession(gc, sessionToken)
 		if err != nil {
-			if isQuery {
+			log.Debug("ValidateBrowserSession failed: ", err)
-				gc.Redirect(http.StatusFound, loginURL)
+			handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-			} else {
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type": "authorization_response",
-						"response": map[string]string{
-							"error":             "login_required",
-							"error_description": "Login is required",
-						},
-					},
-				})
-			}
 			return
 		}
+
 		userID := claims.Subject
 		user, err := db.Provider.GetUserByID(gc, userID)
 		if err != nil {
-			if isQuery {
+			log.Debug("GetUserByID failed: ", err)
-				gc.Redirect(http.StatusFound, loginURL)
+			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
-			} else {
+				"type": "authorization_response",
-				gc.HTML(http.StatusOK, template, gin.H{
+				"response": map[string]interface{}{
-					"target_origin": redirectURI,
+					"error":             "signup_required",
-					"authorization_response": map[string]interface{}{
+					"error_description": "Sign up required",
-						"type": "authorization_response",
+				},
-						"response": map[string]string{
+			}, http.StatusOK)
-							"error":             "signup_required",
-							"error_description": "Sign up required",
-						},
-					},
-				})
-			}
 			return
 		}
 
@@ -223,72 +126,91 @@ func AuthorizeHandler() gin.HandlerFunc {
 			sessionKey = claims.LoginMethod + ":" + user.ID
 		}
 
-		// if user is logged in
+		// rollover the session for security
-		// based on the response type code, generate the response
+		go memorystore.Provider.DeleteUserSession(sessionKey, claims.Nonce)
-		if isResponseTypeCode {
+		if responseType == constants.ResponseTypeCode {
-			// rollover the session for security
-			go memorystore.Provider.DeleteUserSession(sessionKey, claims.Nonce)
 			nonce := uuid.New().String()
 			newSessionTokenData, newSessionToken, err := token.CreateSessionToken(user, nonce, claims.Roles, scope, claims.LoginMethod)
 			if err != nil {
-				if isQuery {
+				log.Debug("CreateSessionToken failed: ", err)
-					gc.Redirect(http.StatusFound, loginURL)
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-				} else {
+				return
-					gc.HTML(http.StatusOK, template, gin.H{
+			}
-						"target_origin": redirectURI,
+
-						"authorization_response": map[string]interface{}{
+			if err := memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeSessionToken+"_"+newSessionTokenData.Nonce, newSessionToken); err != nil {
-							"type": "authorization_response",
+				log.Debug("SetUserSession failed: ", err)
-							"response": map[string]string{
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-								"error":             "login_required",
-								"error_description": "Login is required",
-							},
-						},
-					})
-				}
 				return
 			}
 
-			memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeSessionToken+"_"+newSessionTokenData.Nonce, newSessionToken)
 			cookie.SetSession(gc, newSessionToken)
 			code := uuid.New().String()
-			memorystore.Provider.SetState(codeChallenge, code+"@"+newSessionToken)
+			if err := memorystore.Provider.SetState(codeChallenge, code+"@"+newSessionToken); err != nil {
-			gc.HTML(http.StatusOK, template, gin.H{
+				log.Debug("SetState failed: ", err)
-				"target_origin": redirectURI,
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-				"authorization_response": map[string]interface{}{
+				return
-					"type": "authorization_response",
+			}
-					"response": map[string]string{
+
-						"code":  code,
+			// in case, response type is code and user is already logged in send the code and state
-						"state": state,
+			// and cookie session will already be rolled over and set
-					},
+			// 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
 		}
 
-		if isResponseTypeToken {
+		if responseType == constants.ResponseTypeToken || responseType == constants.ResponseTypeIDToken {
 			// rollover the session for security
 			authToken, err := token.CreateAuthToken(gc, user, claims.Roles, scope, claims.LoginMethod)
 			if err != nil {
-				if isQuery {
+				log.Debug("CreateAuthToken failed: ", err)
-					gc.Redirect(http.StatusFound, loginURL)
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-				} else {
+				return
-					gc.HTML(http.StatusOK, template, gin.H{
+			}
-						"target_origin": redirectURI,
+
-						"authorization_response": map[string]interface{}{
+			if err := memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeSessionToken+"_"+authToken.FingerPrint, authToken.FingerPrintHash); err != nil {
-							"type": "authorization_response",
+				log.Debug("SetUserSession failed: ", err)
-							"response": map[string]string{
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-								"error":             "login_required",
+				return
-								"error_description": "Login is required",
+			}
-							},
+
-						},
+			if err := memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeAccessToken+"_"+authToken.FingerPrint, authToken.AccessToken.Token); err != nil {
-					})
+				log.Debug("SetUserSession failed: ", err)
-				}
+				handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
 				return
 			}
 
-			go memorystore.Provider.DeleteUserSession(sessionKey, claims.Nonce)
-			memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeSessionToken+"_"+authToken.FingerPrint, authToken.FingerPrintHash)
-			memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeAccessToken+"_"+authToken.FingerPrint, authToken.AccessToken.Token)
 			cookie.SetSession(gc, authToken.FingerPrintHash)
 
 			expiresIn := authToken.AccessToken.ExpiresAt - time.Now().Unix()
@@ -314,38 +236,80 @@ func AuthorizeHandler() gin.HandlerFunc {
 				memorystore.Provider.SetUserSession(sessionKey, constants.TokenTypeRefreshToken+"_"+authToken.FingerPrint, authToken.RefreshToken.Token)
 			}
 
-			if isQuery {
+			if responseMode == constants.ResponseModeQuery {
 				if strings.Contains(redirectURI, "?") {
-					gc.Redirect(http.StatusFound, redirectURI+"&"+params)
+					redirectURI = redirectURI + "&" + params
 				} else {
-					gc.Redirect(http.StatusFound, redirectURI+"?"+params)
+					redirectURI = redirectURI + "?" + params
+				}
+			} else if responseMode == constants.ResponseModeFragment {
+				if strings.Contains(redirectURI, "#") {
+					redirectURI = redirectURI + "&" + params
+				} else {
+					redirectURI = redirectURI + "#" + params
 				}
-			} else {
-				gc.HTML(http.StatusOK, template, gin.H{
-					"target_origin": redirectURI,
-					"authorization_response": map[string]interface{}{
-						"type":     "authorization_response",
-						"response": res,
-					},
-				})
 			}
+
+			handleResponse(gc, responseMode, loginURL, redirectURI, map[string]interface{}{
+				"type":     "authorization_response",
+				"response": res,
+			}, http.StatusOK)
 			return
 		}
 
-		if isQuery {
+		handleResponse(gc, responseMode, loginURL, redirectURI, loginError, http.StatusOK)
-			gc.Redirect(http.StatusFound, loginURL)
+	}
-		} else {
+}
-			// by default return with error
+
-			gc.HTML(http.StatusOK, template, gin.H{
+func validateAuthorizeRequest(responseType, responseMode, clientID, state, codeChallenge string) error {
-				"target_origin": redirectURI,
+	if responseType != constants.ResponseTypeCode && responseType != constants.ResponseTypeToken && responseType != constants.ResponseTypeIDToken {
-				"authorization_response": map[string]interface{}{
+		return fmt.Errorf("invalid response type %s. 'code' & 'token' are valid response_type", responseMode)
-					"type": "authorization_response",
+	}
-					"response": map[string]string{
+
-						"error":             "login_required",
+	if responseMode != constants.ResponseModeQuery && responseMode != constants.ResponseModeWebMessage && responseMode != constants.ResponseModeFragment && responseMode != constants.ResponseModeFormPost {
-						"error_description": "Login is required",
+		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 _, ok := data["response"].(map[string]interface{})["error"]; ok {
+		isAuthenticationRequired = true
+	}
+
+	switch responseMode {
+	case constants.ResponseModeQuery, constants.ResponseModeFragment:
+		if isAuthenticationRequired {
+			gc.Redirect(http.StatusFound, loginURI)
+		} else {
+			gc.Redirect(http.StatusFound, redirectURI)
+		}
+		return
+	case constants.ResponseModeWebMessage:
+		gc.HTML(httpStatusCode, authorizeWebMessageTemplate, gin.H{
+			"target_origin":          redirectURI,
+			"authorization_response": data,
+		})
+		return
+	case constants.ResponseModeFormPost:
+		gc.HTML(httpStatusCode, authorizeFormPostTemplate, gin.H{
+			"target_origin":          redirectURI,
+			"authorization_response": data["response"],
+		})
+		return
 	}
 }

server/handlers/openid_config.go

@@ -20,9 +20,9 @@ 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"},
+			"response_modes_supported":              []string{"query", "fragment", "form_post", "web_message"},
 			"id_token_signing_alg_values_supported": []string{jwtType},
 			"claims_supported":                      []string{"aud", "exp", "iss", "iat", "sub", "given_name", "family_name", "middle_name", "nickname", "preferred_username", "picture", "email", "email_verified", "roles", "gender", "birthdate", "phone_number", "phone_number_verified"},
 		})

server/memorystore/memory_store.go

@@ -57,7 +57,7 @@ func InitMemStore() error {
 	}
 
 	redisURL := requiredEnvs.RedisURL
-	if redisURL != "" && !requiredEnvs.disableRedisForEnv {
+	if redisURL != "" && !requiredEnvs.DisableRedisForEnv {
 		log.Info("Initializing Redis memory store")
 		Provider, err = redis.NewRedisProvider(redisURL)
 		if err != nil {

server/memorystore/required_env_store.go

@@ -27,7 +27,7 @@ type RequiredEnv struct {
 	DatabaseCertKey    string `json:"DATABASE_CERT_KEY"`
 	DatabaseCACert     string `json:"DATABASE_CA_CERT"`
 	RedisURL           string `json:"REDIS_URL"`
-	disableRedisForEnv bool   `json:"DISABLE_REDIS_FOR_ENV"`
+	DisableRedisForEnv bool   `json:"DISABLE_REDIS_FOR_ENV"`
 }
 
 // RequiredEnvObj is a simple in-memory store for sessions.
@@ -138,7 +138,7 @@ func InitRequiredEnv() error {
 		DatabaseCertKey:    dbCertKey,
 		DatabaseCACert:     dbCACert,
 		RedisURL:           redisURL,
-		disableRedisForEnv: disableRedisForEnv,
+		DisableRedisForEnv: disableRedisForEnv,
 	}
 
 	RequiredEnvStoreObj = &RequiredEnvStore{

server/resolvers/forgot_password.go

@@ -85,7 +85,7 @@ func ForgotPasswordResolver(ctx context.Context, params model.ForgotPasswordInpu
 		return res, err
 	}
 
-	// exec it as go routine so that we can reduce the api latency
+	// execute it as go routine so that we can reduce the api latency
 	go email.SendEmail([]string{params.Email}, constants.VerificationTypeForgotPassword, map[string]interface{}{
 		"user":             user.ToMap(),
 		"organization":     utils.GetOrganization(),

templates/authorize_form_post.tmpl

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<title>Authorization Response</title>
+	</head>
+	<body onload="document.forms['authorize_form_post'].submit()">
+        <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}}" />
+            {{ end }}
+        </form>
+	</body>
+</html>