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250 lines
8.0 KiB
250 lines
8.0 KiB
// 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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"math"
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"net/http"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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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/openidConnect"
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"github.com/markbates/goth/providers/twitter"
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"github.com/satori/go.uuid"
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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(math.MaxInt16)
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gothic.Store = store
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gothic.SetState = func(req *http.Request) string {
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return uuid.NewV4().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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// 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/" + 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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provider = github.NewCustomisedURL(clientID, clientSecret, callbackURL, authURL, tokenURL, profileURL, emailURL)
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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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provider = google.New(clientID, clientSecret, callbackURL)
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case "openidConnect":
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if provider, err = openidConnect.New(clientID, clientSecret, callbackURL, openIDConnectAutoDiscoveryURL); 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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}
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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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}
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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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}
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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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}
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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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