Revert "Fix response_type missing param"

This reverts commit 821b242c.

server/http.go

@@ -255,7 +255,7 @@ func renderLoginPage(w http.ResponseWriter, r *http.Request, srv OIDCServer, idp
 
 		v := r.URL.Query()
 		v.Set("connector_id", idpc.ID())
-		v.Set("response_type", q.Get("response_type"))
+		v.Set("response_type", "code")
 		link.URL = httpPathAuth + "?" + v.Encode()
 		td.Links = append(td.Links, link)
 	}
@@ -273,92 +273,77 @@ func handleAuthFunc(srv OIDCServer, idpcs []connector.Connector, tpl *template.T
 		}
 
 		q := r.URL.Query()
+		register := q.Get("register") == "1" && registrationEnabled
+		e := q.Get("error")
+		if e != "" {
+			sessionKey := q.Get("state")
+			if err := srv.KillSession(sessionKey); err != nil {
+				log.Errorf("Failed killing sessionKey %q: %v", sessionKey, err)
+			}
+			renderLoginPage(w, r, srv, idpcs, register, tpl)
+			return
+		}
 
-		// Retrieve client id
-		clientid := q.Get("client_id")
-
-		// Retrieve state
-		state := q.Get("state")
-
-		// Retrieve response_type
-		responseType := q.Get("response_type")
-
-		// Retrieve scopes
-		qscope := strings.Fields(q.Get("scope"))
-
-		// Check client ID param
-		if clientid == "" {
-			log.Errorf("Invalid auth request: no client_id received")
-			writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
+		connectorID := q.Get("connector_id")
+		idpc, ok := idx[connectorID]
+		if !ok {
+			renderLoginPage(w, r, srv, idpcs, register, tpl)
 			return
 		}
 
-		// Check redirect_uri param, but if it's empty we don't return any error here
-		qru := q.Get("redirect_uri")
-		var rURL *url.URL
-		if qru != "" {
-			ru, err := url.Parse(qru)
-			if err != nil {
-				log.Errorf("Invalid auth request: %v", err)
-				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
-				return
-			}
-			rURL = ru
+		acr, err := oauth2.ParseAuthCodeRequest(q)
+		if err != nil {
+			log.Errorf("Invalid auth request: %v", err)
+			writeAuthError(w, err, acr.State)
+			return
 		}
 
-		cm, err := srv.ClientMetadata(clientid)
+		cm, err := srv.ClientMetadata(acr.ClientID)
 		if err != nil {
-			log.Errorf("Failed fetching client %q from repo: %v", clientid, err)
-			writeAuthError(w, oauth2.NewError(oauth2.ErrorServerError), state)
+			log.Errorf("Failed fetching client %q from repo: %v", acr.ClientID, err)
+			writeAuthError(w, oauth2.NewError(oauth2.ErrorServerError), acr.State)
 			return
 		}
 		if cm == nil {
-			log.Errorf("Client %q not found", clientid)
-			writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
+			log.Errorf("Client %q not found", acr.ClientID)
+			writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), acr.State)
 			return
 		}
 
 		if len(cm.RedirectURIs) == 0 {
-			log.Errorf("Client %q has no redirect URLs", clientid)
-			writeAuthError(w, oauth2.NewError(oauth2.ErrorServerError), state)
+			log.Errorf("Client %q has no redirect URLs", acr.ClientID)
+			writeAuthError(w, oauth2.NewError(oauth2.ErrorServerError), acr.State)
 			return
 		}
 
-		redirectURL, err := client.ValidRedirectURL(rURL, cm.RedirectURIs)
+		redirectURL, err := client.ValidRedirectURL(acr.RedirectURL, cm.RedirectURIs)
 		if err != nil {
 			switch err {
 			case (client.ErrorCantChooseRedirectURL):
-				log.Errorf("Request must provide redirect URL as client %q has registered many", clientid)
-				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
+				log.Errorf("Request must provide redirect URL as client %q has registered many", acr.ClientID)
+				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), acr.State)
 				return
 			case (client.ErrorInvalidRedirectURL):
-				log.Errorf("Request provided unregistered redirect URL: %s", rURL)
-				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
+				log.Errorf("Request provided unregistered redirect URL: %s", acr.RedirectURL)
+				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), acr.State)
 				return
 			case (client.ErrorNoValidRedirectURLs):
-				log.Errorf("There are no registered URLs for the requested client: %s", rURL)
-				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
-				return
-			default:
-				log.Errorf("Unexpected error checking redirect URL for client %q: %v", clientid, err)
-				writeAuthError(w, oauth2.NewError(oauth2.ErrorServerError), state)
+				log.Errorf("There are no registered URLs for the requested client: %s", acr.RedirectURL)
+				writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), acr.State)
 				return
 			}
 		}
 
-		// Response type check
-		switch responseType {
-		case "code": // Add more cases as we support more response types
-		default:
-			log.Errorf("Invalid auth request: unsupported response_type")
-			redirectAuthError(w, oauth2.NewError(oauth2.ErrorUnsupportedResponseType), state, redirectURL)
+		if acr.ResponseType != oauth2.ResponseTypeCode {
+			log.Errorf("unexpected ResponseType: %v: ", acr.ResponseType)
+			redirectAuthError(w, oauth2.NewError(oauth2.ErrorUnsupportedResponseType), acr.State, redirectURL)
 			return
 		}
 
 		// Check scopes.
 		var scopes []string
 		foundOpenIDScope := false
-		for _, scope := range qscope {
+		for _, scope := range acr.Scope {
 			switch scope {
 			case "openid":
 				foundOpenIDScope = true
@@ -379,33 +364,16 @@ func handleAuthFunc(srv OIDCServer, idpcs []connector.Connector, tpl *template.T
 
 		if !foundOpenIDScope {
 			log.Errorf("Invalid auth request: missing 'openid' in 'scope'")
-			writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), state)
-			return
-		}
-
-		register := q.Get("register") == "1" && registrationEnabled
-		e := q.Get("error")
-		if e != "" {
-			if err := srv.KillSession(state); err != nil {
-				log.Errorf("Failed killing sessionKey %q: %v", state, err)
-			}
-			renderLoginPage(w, r, srv, idpcs, register, tpl)
-			return
-		}
-
-		connectorID := q.Get("connector_id")
-		idpc, ok := idx[connectorID]
-		if !ok {
-			renderLoginPage(w, r, srv, idpcs, register, tpl)
+			writeAuthError(w, oauth2.NewError(oauth2.ErrorInvalidRequest), acr.State)
 			return
 		}
 
 		nonce := q.Get("nonce")
 
-		key, err := srv.NewSession(connectorID, clientid, state, redirectURL, nonce, register, qscope)
+		key, err := srv.NewSession(connectorID, acr.ClientID, acr.State, redirectURL, nonce, register, acr.Scope)
 		if err != nil {
 			log.Errorf("Error creating new session: %v: ", err)
-			redirectAuthError(w, err, state, redirectURL)
+			redirectAuthError(w, err, acr.State, redirectURL)
 			return
 		}
 
@@ -431,7 +399,7 @@ func handleAuthFunc(srv OIDCServer, idpcs []connector.Connector, tpl *template.T
 		lu, err := idpc.LoginURL(key, p)
 		if err != nil {
 			log.Errorf("Connector.LoginURL failed: %v", err)
-			redirectAuthError(w, err, state, redirectURL)
+			redirectAuthError(w, err, acr.State, redirectURL)
 			return
 		}
 

server/http_test.go

@@ -175,29 +175,6 @@ func TestHandleAuthFuncResponsesSingleRedirectURL(t *testing.T) {
 			},
 			wantCode: http.StatusBadRequest,
 		},
-
-		// empty response_type
-		{
-			query: url.Values{
-				"redirect_uri": []string{"http://client.example.com/callback"},
-				"client_id":    []string{"XXX"},
-				"connector_id": []string{"fake"},
-				"scope":        []string{"openid"},
-			},
-			wantCode:     http.StatusFound,
-			wantLocation: "http://client.example.com/callback?error=unsupported_response_type&state=",
-		},
-
-		// empty client_id
-		{
-			query: url.Values{
-				"response_type": []string{"code"},
-				"redirect_uri":  []string{"http://unrecognized.example.com/callback"},
-				"connector_id":  []string{"fake"},
-				"scope":         []string{"openid"},
-			},
-			wantCode: http.StatusBadRequest,
-		},
 	}
 
 	for i, tt := range tests {