A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package oauth2
import (
"net/http"
"net/url"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
uuid "github.com/google/uuid"
"github.com/lafriks/xormstore"
"github.com/markbates/goth"
"github.com/markbates/goth/gothic"
"github.com/markbates/goth/providers/bitbucket"
"github.com/markbates/goth/providers/discord"
"github.com/markbates/goth/providers/dropbox"
"github.com/markbates/goth/providers/facebook"
"github.com/markbates/goth/providers/gitea"
"github.com/markbates/goth/providers/github"
"github.com/markbates/goth/providers/gitlab"
"github.com/markbates/goth/providers/google"
"github.com/markbates/goth/providers/mastodon"
"github.com/markbates/goth/providers/nextcloud"
"github.com/markbates/goth/providers/openidConnect"
"github.com/markbates/goth/providers/twitter"
"github.com/markbates/goth/providers/yandex"
"xorm.io/xorm"
)
var (
sessionUsersStoreKey = "gitea-oauth2-sessions"
providerHeaderKey = "gitea-oauth2-provider"
)
// CustomURLMapping describes the urls values to use when customizing OAuth2 provider URLs
type CustomURLMapping struct {
AuthURL string
TokenURL string
ProfileURL string
EmailURL string
}
// Init initialize the setup of the OAuth2 library
func Init(x *xorm.Engine) error {
store, err := xormstore.NewOptions(x, xormstore.Options{
TableName: "oauth2_session",
}, []byte(sessionUsersStoreKey))
if err != nil {
return err
}
// according to the Goth lib:
// set the maxLength of the cookies stored on the disk to a larger number to prevent issues with:
// securecookie: the value is too long
// when using OpenID Connect , since this can contain a large amount of extra information in the id_token
// Note, when using the FilesystemStore only the session.ID is written to a browser cookie, so this is explicit for the storage on disk
store.MaxLength(setting.OAuth2.MaxTokenLength)
gothic.Store = store
gothic.SetState = func(req *http.Request) string {
return uuid.New().String()
}
gothic.GetProviderName = func(req *http.Request) (string, error) {
return req.Header.Get(providerHeaderKey), nil
}
return nil
}
// Auth OAuth2 auth service
func Auth(provider string, request *http.Request, response http.ResponseWriter) error {
// not sure if goth is thread safe (?) when using multiple providers
request.Header.Set(providerHeaderKey, provider)
// don't use the default gothic begin handler to prevent issues when some error occurs
// normally the gothic library will write some custom stuff to the response instead of our own nice error page
//gothic.BeginAuthHandler(response, request)
url, err := gothic.GetAuthURL(response, request)
if err == nil {
http.Redirect(response, request, url, http.StatusTemporaryRedirect)
}
return err
}
// ProviderCallback handles OAuth callback, resolve to a goth user and send back to original url
// this will trigger a new authentication request, but because we save it in the session we can use that
func ProviderCallback(provider string, request *http.Request, response http.ResponseWriter) (goth.User, error) {
// not sure if goth is thread safe (?) when using multiple providers
request.Header.Set(providerHeaderKey, provider)
user, err := gothic.CompleteUserAuth(response, request)
if err != nil {
return user, err
}
return user, nil
}
// RegisterProvider register a OAuth2 provider in goth lib
func RegisterProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL string, customURLMapping *CustomURLMapping) error {
provider, err := createProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL, customURLMapping)
if err == nil && provider != nil {
goth.UseProviders(provider)
}
return err
}
// RemoveProvider removes the given OAuth2 provider from the goth lib
func RemoveProvider(providerName string) {
delete(goth.GetProviders(), providerName)
}
// ClearProviders clears all OAuth2 providers from the goth lib
func ClearProviders() {
goth.ClearProviders()
}
// used to create different types of goth providers
func createProvider(providerName, providerType, clientID, clientSecret, openIDConnectAutoDiscoveryURL string, customURLMapping *CustomURLMapping) (goth.Provider, error) {
callbackURL := setting.AppURL + "user/oauth2/" + url.PathEscape(providerName) + "/callback"
var provider goth.Provider
var err error
switch providerType {
case "bitbucket":
provider = bitbucket.New(clientID, clientSecret, callbackURL, "account")
case "dropbox":
provider = dropbox.New(clientID, clientSecret, callbackURL)
case "facebook":
provider = facebook.New(clientID, clientSecret, callbackURL, "email")
case "github":
authURL := github.AuthURL
tokenURL := github.TokenURL
profileURL := github.ProfileURL
emailURL := github.EmailURL
if customURLMapping != nil {
if len(customURLMapping.AuthURL) > 0 {
authURL = customURLMapping.AuthURL
}
if len(customURLMapping.TokenURL) > 0 {
tokenURL = customURLMapping.TokenURL
}
if len(customURLMapping.ProfileURL) > 0 {
profileURL = customURLMapping.ProfileURL
}
if len(customURLMapping.EmailURL) > 0 {
emailURL = customURLMapping.EmailURL
}
}
provider = github.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL, emailURL)
case "gitlab":
authURL := gitlab.AuthURL
tokenURL := gitlab.TokenURL
profileURL := gitlab.ProfileURL
if customURLMapping != nil {
if len(customURLMapping.AuthURL) > 0 {
authURL = customURLMapping.AuthURL
}
if len(customURLMapping.TokenURL) > 0 {
tokenURL = customURLMapping.TokenURL
}
if len(customURLMapping.ProfileURL) > 0 {
profileURL = customURLMapping.ProfileURL
}
}
provider = gitlab.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL, "read_user")
case "gplus": // named gplus due to legacy gplus -> google migration (Google killed Google+). This ensures old connections still work
provider = google.New(clientID, clientSecret, callbackURL)
case "openidConnect":
if provider, err = openidConnect.New(clientID, clientSecret, callbackURL, openIDConnectAutoDiscoveryURL); err != nil {
log.Warn("Failed to create OpenID Connect Provider with name '%s' with url '%s': %v", providerName, openIDConnectAutoDiscoveryURL, err)
}
case "twitter":
provider = twitter.NewAuthenticate(clientID, clientSecret, callbackURL)
case "discord":
provider = discord.New(clientID, clientSecret, callbackURL, discord.ScopeIdentify, discord.ScopeEmail)
case "gitea":
authURL := gitea.AuthURL
tokenURL := gitea.TokenURL
profileURL := gitea.ProfileURL
if customURLMapping != nil {
if len(customURLMapping.AuthURL) > 0 {
authURL = customURLMapping.AuthURL
}
if len(customURLMapping.TokenURL) > 0 {
tokenURL = customURLMapping.TokenURL
}
if len(customURLMapping.ProfileURL) > 0 {
profileURL = customURLMapping.ProfileURL
}
}
provider = gitea.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL)
case "nextcloud":
authURL := nextcloud.AuthURL
tokenURL := nextcloud.TokenURL
profileURL := nextcloud.ProfileURL
if customURLMapping != nil {
if len(customURLMapping.AuthURL) > 0 {
authURL = customURLMapping.AuthURL
}
if len(customURLMapping.TokenURL) > 0 {
tokenURL = customURLMapping.TokenURL
}
if len(customURLMapping.ProfileURL) > 0 {
profileURL = customURLMapping.ProfileURL
}
}
provider = nextcloud.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL)
case "yandex":
// See https://tech.yandex.com/passport/doc/dg/reference/response-docpage/
provider = yandex.New(clientID, clientSecret, callbackURL, "login:email", "login:info", "login:avatar")
case "mastodon":
instanceURL := mastodon.InstanceURL
if customURLMapping != nil && len(customURLMapping.AuthURL) > 0 {
instanceURL = customURLMapping.AuthURL
}
provider = mastodon.NewCustomisedURL(clientID, clientSecret, callbackURL, instanceURL)
}
// always set the name if provider is created so we can support multiple setups of 1 provider
if err == nil && provider != nil {
provider.SetName(providerName)
}
return provider, err
}
// GetDefaultTokenURL return the default token url for the given provider
func GetDefaultTokenURL(provider string) string {
switch provider {
case "github":
return github.TokenURL
case "gitlab":
return gitlab.TokenURL
case "gitea":
return gitea.TokenURL
case "nextcloud":
return nextcloud.TokenURL
}
return ""
}
// GetDefaultAuthURL return the default authorize url for the given provider
func GetDefaultAuthURL(provider string) string {
switch provider {
case "github":
return github.AuthURL
case "gitlab":
return gitlab.AuthURL
case "gitea":
return gitea.AuthURL
case "nextcloud":
return nextcloud.AuthURL
case "mastodon":
return mastodon.InstanceURL
}
return ""
}
// GetDefaultProfileURL return the default profile url for the given provider
func GetDefaultProfileURL(provider string) string {
switch provider {
case "github":
return github.ProfileURL
case "gitlab":
return gitlab.ProfileURL
case "gitea":
return gitea.ProfileURL
case "nextcloud":
return nextcloud.ProfileURL
}
return ""
}
// GetDefaultEmailURL return the default email url for the given provider
func GetDefaultEmailURL(provider string) string {
if provider == "github" {
return github.EmailURL
}
return ""
}