mirror of
https://github.com/go-gitea/gitea.git
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55eb1745bd
* Refactored handleOAuth2SignIn in routers/user/auth.go The function handleOAuth2SignIn was called twice but some code path could only be reached by one of the invocations. Moved the unnecessary code path out of handleOAuth2SignIn. * Refactored user creation There was common code to create a user and display the correct error message. And after the creation the only user should be an admin and if enabled a confirmation email should be sent. This common code is now abstracted into two functions and a helper function to call both. * Added auto-register for OAuth2 users If enabled new OAuth2 users will be registered with their OAuth2 details. The UserID, Name and Email fields from the gothUser are used. Therefore the OpenID Connect provider needs additional scopes to return the coresponding claims. * Added error for missing fields in OAuth2 response * Linking and auto linking on oauth2 registration * Set default username source to nickname * Add automatic oauth2 scopes for github and google * Add hint to change the openid connect scopes if fields are missing * Extend info about auto linking security risk Co-authored-by: Viktor Kuzmin <kvaster@gmail.com> Signed-off-by: Martin Michaelis <code@mgjm.de>
300 lines
9.8 KiB
Go
300 lines
9.8 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package oauth2
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import (
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"net/http"
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"net/url"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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uuid "github.com/google/uuid"
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"github.com/lafriks/xormstore"
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"github.com/markbates/goth"
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"github.com/markbates/goth/gothic"
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"github.com/markbates/goth/providers/bitbucket"
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"github.com/markbates/goth/providers/discord"
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"github.com/markbates/goth/providers/dropbox"
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"github.com/markbates/goth/providers/facebook"
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"github.com/markbates/goth/providers/gitea"
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"github.com/markbates/goth/providers/github"
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"github.com/markbates/goth/providers/gitlab"
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"github.com/markbates/goth/providers/google"
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"github.com/markbates/goth/providers/mastodon"
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"github.com/markbates/goth/providers/nextcloud"
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"github.com/markbates/goth/providers/openidConnect"
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"github.com/markbates/goth/providers/twitter"
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"github.com/markbates/goth/providers/yandex"
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"xorm.io/xorm"
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)
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var (
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sessionUsersStoreKey = "gitea-oauth2-sessions"
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providerHeaderKey = "gitea-oauth2-provider"
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)
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// CustomURLMapping describes the urls values to use when customizing OAuth2 provider URLs
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type CustomURLMapping struct {
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AuthURL string
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TokenURL string
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ProfileURL string
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EmailURL string
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}
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// Init initialize the setup of the OAuth2 library
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func Init(x *xorm.Engine) error {
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store, err := xormstore.NewOptions(x, xormstore.Options{
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TableName: "oauth2_session",
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}, []byte(sessionUsersStoreKey))
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if err != nil {
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return err
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}
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// according to the Goth lib:
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// set the maxLength of the cookies stored on the disk to a larger number to prevent issues with:
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// securecookie: the value is too long
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// when using OpenID Connect , since this can contain a large amount of extra information in the id_token
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// Note, when using the FilesystemStore only the session.ID is written to a browser cookie, so this is explicit for the storage on disk
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store.MaxLength(setting.OAuth2.MaxTokenLength)
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gothic.Store = store
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gothic.SetState = func(req *http.Request) string {
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return uuid.New().String()
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}
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gothic.GetProviderName = func(req *http.Request) (string, error) {
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return req.Header.Get(providerHeaderKey), nil
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}
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return nil
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}
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// Auth OAuth2 auth service
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func Auth(provider string, request *http.Request, response http.ResponseWriter) error {
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// not sure if goth is thread safe (?) when using multiple providers
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request.Header.Set(providerHeaderKey, provider)
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// don't use the default gothic begin handler to prevent issues when some error occurs
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// normally the gothic library will write some custom stuff to the response instead of our own nice error page
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//gothic.BeginAuthHandler(response, request)
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url, err := gothic.GetAuthURL(response, request)
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if err == nil {
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http.Redirect(response, request, url, http.StatusTemporaryRedirect)
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}
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return err
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}
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// ProviderCallback handles OAuth callback, resolve to a goth user and send back to original url
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// this will trigger a new authentication request, but because we save it in the session we can use that
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func ProviderCallback(provider string, request *http.Request, response http.ResponseWriter) (goth.User, error) {
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// not sure if goth is thread safe (?) when using multiple providers
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request.Header.Set(providerHeaderKey, provider)
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user, err := gothic.CompleteUserAuth(response, request)
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if err != nil {
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return user, err
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}
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return user, nil
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}
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// RegisterProvider register a OAuth2 provider in goth lib
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func RegisterProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL string, customURLMapping *CustomURLMapping) error {
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provider, err := createProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL, customURLMapping)
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if err == nil && provider != nil {
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goth.UseProviders(provider)
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}
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return err
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}
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// RemoveProvider removes the given OAuth2 provider from the goth lib
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func RemoveProvider(providerName string) {
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delete(goth.GetProviders(), providerName)
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}
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// ClearProviders clears all OAuth2 providers from the goth lib
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func ClearProviders() {
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goth.ClearProviders()
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}
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// used to create different types of goth providers
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func createProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL string, customURLMapping *CustomURLMapping) (goth.Provider, error) {
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callbackURL := setting.AppURL + "user/oauth2/" + url.PathEscape(providerName) + "/callback"
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var provider goth.Provider
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var err error
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switch providerType {
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case "bitbucket":
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provider = bitbucket.New(clientID, clientSecret, callbackURL, "account")
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case "dropbox":
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provider = dropbox.New(clientID, clientSecret, callbackURL)
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case "facebook":
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provider = facebook.New(clientID, clientSecret, callbackURL, "email")
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case "github":
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authURL := github.AuthURL
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tokenURL := github.TokenURL
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profileURL := github.ProfileURL
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emailURL := github.EmailURL
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if customURLMapping != nil {
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if len(customURLMapping.AuthURL) > 0 {
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authURL = customURLMapping.AuthURL
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}
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if len(customURLMapping.TokenURL) > 0 {
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tokenURL = customURLMapping.TokenURL
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}
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if len(customURLMapping.ProfileURL) > 0 {
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profileURL = customURLMapping.ProfileURL
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}
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if len(customURLMapping.EmailURL) > 0 {
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emailURL = customURLMapping.EmailURL
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}
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}
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scopes := []string{}
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if setting.OAuth2Client.EnableAutoRegistration {
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scopes = append(scopes, "user:email")
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}
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provider = github.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL, emailURL, scopes...)
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case "gitlab":
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authURL := gitlab.AuthURL
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tokenURL := gitlab.TokenURL
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profileURL := gitlab.ProfileURL
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if customURLMapping != nil {
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if len(customURLMapping.AuthURL) > 0 {
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authURL = customURLMapping.AuthURL
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}
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if len(customURLMapping.TokenURL) > 0 {
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tokenURL = customURLMapping.TokenURL
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}
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if len(customURLMapping.ProfileURL) > 0 {
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profileURL = customURLMapping.ProfileURL
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}
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}
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provider = gitlab.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL, "read_user")
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case "gplus": // named gplus due to legacy gplus -> google migration (Google killed Google+). This ensures old connections still work
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scopes := []string{"email"}
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if setting.OAuth2Client.UpdateAvatar || setting.OAuth2Client.EnableAutoRegistration {
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scopes = append(scopes, "profile")
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}
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provider = google.New(clientID, clientSecret, callbackURL, scopes...)
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case "openidConnect":
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if provider, err = openidConnect.New(clientID, clientSecret, callbackURL, openIDConnectAutoDiscoveryURL, setting.OAuth2Client.OpenIDConnectScopes...); err != nil {
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log.Warn("Failed to create OpenID Connect Provider with name '%s' with url '%s': %v", providerName, openIDConnectAutoDiscoveryURL, err)
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}
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case "twitter":
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provider = twitter.NewAuthenticate(clientID, clientSecret, callbackURL)
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case "discord":
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provider = discord.New(clientID, clientSecret, callbackURL, discord.ScopeIdentify, discord.ScopeEmail)
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case "gitea":
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authURL := gitea.AuthURL
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tokenURL := gitea.TokenURL
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profileURL := gitea.ProfileURL
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if customURLMapping != nil {
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if len(customURLMapping.AuthURL) > 0 {
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authURL = customURLMapping.AuthURL
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}
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if len(customURLMapping.TokenURL) > 0 {
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tokenURL = customURLMapping.TokenURL
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}
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if len(customURLMapping.ProfileURL) > 0 {
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profileURL = customURLMapping.ProfileURL
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}
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}
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provider = gitea.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL)
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case "nextcloud":
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authURL := nextcloud.AuthURL
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tokenURL := nextcloud.TokenURL
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profileURL := nextcloud.ProfileURL
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if customURLMapping != nil {
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if len(customURLMapping.AuthURL) > 0 {
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authURL = customURLMapping.AuthURL
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}
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if len(customURLMapping.TokenURL) > 0 {
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tokenURL = customURLMapping.TokenURL
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}
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if len(customURLMapping.ProfileURL) > 0 {
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profileURL = customURLMapping.ProfileURL
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}
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}
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provider = nextcloud.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL)
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case "yandex":
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// See https://tech.yandex.com/passport/doc/dg/reference/response-docpage/
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provider = yandex.New(clientID, clientSecret, callbackURL, "login:email", "login:info", "login:avatar")
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case "mastodon":
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instanceURL := mastodon.InstanceURL
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if customURLMapping != nil && len(customURLMapping.AuthURL) > 0 {
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instanceURL = customURLMapping.AuthURL
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}
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provider = mastodon.NewCustomisedURL(clientID, clientSecret, callbackURL, instanceURL)
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}
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// always set the name if provider is created so we can support multiple setups of 1 provider
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if err == nil && provider != nil {
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provider.SetName(providerName)
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}
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return provider, err
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}
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// GetDefaultTokenURL return the default token url for the given provider
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func GetDefaultTokenURL(provider string) string {
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switch provider {
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case "github":
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return github.TokenURL
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case "gitlab":
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return gitlab.TokenURL
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case "gitea":
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return gitea.TokenURL
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case "nextcloud":
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return nextcloud.TokenURL
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}
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return ""
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}
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// GetDefaultAuthURL return the default authorize url for the given provider
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func GetDefaultAuthURL(provider string) string {
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switch provider {
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case "github":
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return github.AuthURL
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case "gitlab":
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return gitlab.AuthURL
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case "gitea":
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return gitea.AuthURL
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case "nextcloud":
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return nextcloud.AuthURL
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case "mastodon":
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return mastodon.InstanceURL
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}
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return ""
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}
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// GetDefaultProfileURL return the default profile url for the given provider
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func GetDefaultProfileURL(provider string) string {
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switch provider {
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case "github":
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return github.ProfileURL
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case "gitlab":
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return gitlab.ProfileURL
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case "gitea":
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return gitea.ProfileURL
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case "nextcloud":
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return nextcloud.ProfileURL
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}
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return ""
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}
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// GetDefaultEmailURL return the default email url for the given provider
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func GetDefaultEmailURL(provider string) string {
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if provider == "github" {
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return github.EmailURL
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}
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return ""
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}
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