Add new Authentication Source: GitHub, including GitHub Enterprise.

conf/auth.d/github.conf.example

@@ -0,0 +1,10 @@
+# This is an example of GitHub authentication
+#
+id           = 106
+type         = github
+name         = GitHub OAuth 2.0
+is_activated = true
+
+[config]
+api_endpoint = https://api.github.com/
+

conf/locale/locale_en-US.ini

@@ -1147,6 +1147,7 @@ auths.delete_auth_desc = This authentication is going to be deleted, do you want
 auths.still_in_used = This authentication is still used by some users, please delete or convert these users to another login type first.
 auths.deletion_success = Authentication has been deleted successfully!
 auths.login_source_exist = Login source '%s' already exists.
+auths.github_api_endpoint = API Endpoint
 
 config.not_set = (not set)
 config.server_config = Server Configuration

models/login_source.go

@@ -24,6 +24,7 @@ import (
 	"gopkg.in/ini.v1"
 
 	"github.com/gogs/gogs/models/errors"
+	"github.com/gogs/gogs/pkg/auth/github"
 	"github.com/gogs/gogs/pkg/auth/ldap"
 	"github.com/gogs/gogs/pkg/auth/pam"
 	"github.com/gogs/gogs/pkg/setting"
@@ -39,13 +40,15 @@ const (
 	LOGIN_SMTP             // 3
 	LOGIN_PAM              // 4
 	LOGIN_DLDAP            // 5
+	LOGIN_GITHUB           // 6
 )
 
 var LoginNames = map[LoginType]string{
-	LOGIN_LDAP:  "LDAP (via BindDN)",
+	LOGIN_LDAP:   "LDAP (via BindDN)",
-	LOGIN_DLDAP: "LDAP (simple auth)", // Via direct bind
+	LOGIN_DLDAP:  "LDAP (simple auth)", // Via direct bind
-	LOGIN_SMTP:  "SMTP",
+	LOGIN_SMTP:   "SMTP",
-	LOGIN_PAM:   "PAM",
+	LOGIN_PAM:    "PAM",
+	LOGIN_GITHUB: "GitHub",
 }
 
 var SecurityProtocolNames = map[ldap.SecurityProtocol]string{
@@ -59,6 +62,7 @@ var (
 	_ core.Conversion = &LDAPConfig{}
 	_ core.Conversion = &SMTPConfig{}
 	_ core.Conversion = &PAMConfig{}
+	_ core.Conversion = &GITHUBConfig{}
 )
 
 type LDAPConfig struct {
@@ -106,6 +110,18 @@ func (cfg *PAMConfig) ToDB() ([]byte, error) {
 	return jsoniter.Marshal(cfg)
 }
 
+type GITHUBConfig struct {
+	ApiEndpoint string // Github service (e.g. https://github.com/api/v1/)
+}
+
+func (cfg *GITHUBConfig) FromDB(bs []byte) error {
+	return jsoniter.Unmarshal(bs, &cfg)
+}
+
+func (cfg *GITHUBConfig) ToDB() ([]byte, error) {
+	return jsoniter.Marshal(cfg)
+}
+
 // AuthSourceFile contains information of an authentication source file.
 type AuthSourceFile struct {
 	abspath string
@@ -173,6 +189,8 @@ func (s *LoginSource) BeforeSet(colName string, val xorm.Cell) {
 			s.Cfg = new(SMTPConfig)
 		case LOGIN_PAM:
 			s.Cfg = new(PAMConfig)
+		case LOGIN_GITHUB:
+			s.Cfg = new(GITHUBConfig)
 		default:
 			panic("unrecognized login source type: " + com.ToStr(*val))
 		}
@@ -208,6 +226,10 @@ func (s *LoginSource) IsPAM() bool {
 	return s.Type == LOGIN_PAM
 }
 
+func (s *LoginSource) IsGITHUB() bool {
+	return s.Type == LOGIN_GITHUB
+}
+
 func (s *LoginSource) HasTLS() bool {
 	return ((s.IsLDAP() || s.IsDLDAP()) &&
 		s.LDAP().SecurityProtocol > ldap.SECURITY_PROTOCOL_UNENCRYPTED) ||
@@ -248,6 +270,10 @@ func (s *LoginSource) PAM() *PAMConfig {
 	return s.Cfg.(*PAMConfig)
 }
 
+func (s *LoginSource) GITHUB() *GITHUBConfig {
+	return s.Cfg.(*GITHUBConfig)
+}
+
 func CreateLoginSource(source *LoginSource) error {
 	has, err := x.Get(&LoginSource{Name: source.Name})
 	if err != nil {
@@ -456,6 +482,9 @@ func LoadAuthSources() {
 		case "pam":
 			loginSource.Type = LOGIN_PAM
 			loginSource.Cfg = &PAMConfig{}
+		case "github":
+			loginSource.Type = LOGIN_GITHUB
+			loginSource.Cfg = &GITHUBConfig{}
 		default:
 			log.Fatal(2, "Failed to load authentication source: unknown type '%s'", authType)
 		}
@@ -694,7 +723,33 @@ func LoginViaPAM(user *User, login, password string, sourceID int64, cfg *PAMCon
 	}
 	return user, CreateUser(user)
 }
+func LoginViaGITHUB(user *User, login, password string, sourceID int64, cfg *GITHUBConfig, autoRegister bool) (*User, error) {
+	login_id, fullname, email, url, location, err := github.GITHUBAuth(cfg.ApiEndpoint, login, password)
+	if err != nil {
+		if strings.Contains(err.Error(), "Authentication failure") {
+			return nil, errors.UserNotExist{0, login}
+		}
+		return nil, err
+	}
 
+	if !autoRegister {
+		return user, nil
+	}
+	user = &User{
+		LowerName:   strings.ToLower(login),
+		Name:        login_id,
+		FullName:    fullname,
+		Email:       email,
+		Website:     url,
+		Passwd:      password,
+		LoginType:   LOGIN_GITHUB,
+		LoginSource: sourceID,
+		LoginName:   login,
+		IsActive:    true,
+		Location:    location,
+	}
+	return user, CreateUser(user)
+}
 func remoteUserLogin(user *User, login, password string, source *LoginSource, autoRegister bool) (*User, error) {
 	if !source.IsActived {
 		return nil, errors.LoginSourceNotActivated{source.ID}
@@ -707,6 +762,8 @@ func remoteUserLogin(user *User, login, password string, source *LoginSource, au
 		return LoginViaSMTP(user, login, password, source.ID, source.Cfg.(*SMTPConfig), autoRegister)
 	case LOGIN_PAM:
 		return LoginViaPAM(user, login, password, source.ID, source.Cfg.(*PAMConfig), autoRegister)
+	case LOGIN_GITHUB:
+		return LoginViaGITHUB(user, login, password, source.ID, source.Cfg.(*GITHUBConfig), autoRegister)
 	}
 
 	return nil, errors.InvalidLoginSourceType{source.Type}

models/models.go

@@ -345,6 +345,8 @@ func ImportDatabase(dirPath string, verbose bool) (err error) {
 					bean.Cfg = new(SMTPConfig)
 				case LOGIN_PAM:
 					bean.Cfg = new(PAMConfig)
+				case LOGIN_GITHUB:
+					bean.Cfg = new(GITHUBConfig)
 				default:
 					return fmt.Errorf("unrecognized login source type:: %v", tp)
 				}

pkg/auth/github/github.go

@@ -0,0 +1,45 @@
+package github
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/google/go-github/github"
+)
+
+func GITHUBAuth(apiEndpoint, userName, passwd string) (string, string, string, string, string, error) {
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+	}
+	tp := github.BasicAuthTransport{
+		Username:  strings.TrimSpace(userName),
+		Password:  strings.TrimSpace(passwd),
+		Transport: tr,
+	}
+	client, err := github.NewEnterpriseClient(apiEndpoint, apiEndpoint, tp.Client())
+	if err != nil {
+		return "", "", "", "", "", errors.New("Authentication failure: GitHub Api Endpoint can not be reached")
+	}
+	ctx := context.Background()
+	user, _, err := client.Users.Get(ctx, "")
+	if err != nil || user == nil {
+		fmt.Println(err)
+		msg := fmt.Sprintf("Authentication failure! Github Api Endpoint authticated failed! User %s", userName)
+		return "", "", "", "", "", errors.New(msg)
+	}
+
+	var website = ""
+	if user.HTMLURL != nil {
+		website = strings.ToLower(*user.HTMLURL)
+	}
+	var location = ""
+	if user.Location != nil {
+		location = strings.ToUpper(*user.Location)
+	}
+
+	return *user.Login, *user.Name, *user.Email, website, location, nil
+}

pkg/form/auth.go

@@ -11,7 +11,7 @@ import (
 
 type Authentication struct {
 	ID                int64
-	Type              int    `binding:"Range(2,5)"`
+	Type              int    `binding:"Range(2,6)"`
 	Name              string `binding:"Required;MaxSize(30)"`
 	Host              string
 	Port              int
@@ -40,6 +40,7 @@ type Authentication struct {
 	TLS               bool
 	SkipVerify        bool
 	PAMServiceName    string
+	GithubApiEndpoint string `binding:Required;Url`
 }
 
 func (f *Authentication) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {

public/js/gogs.js

@@ -851,6 +851,7 @@ function initAdmin() {
             $('.dldap').hide();
             $('.smtp').hide();
             $('.pam').hide();
+            $('.github').hide();
             $('.has-tls').hide();
 
             var authType = $(this).val();
@@ -868,7 +869,10 @@ function initAdmin() {
                 case '5':     // LDAP
                     $('.dldap').show();
                     break;
-            }
+                case '6': //GITHUB
+                    $('.github').show();
+                      break;
+              }
 
             if (authType == '2' || authType == '5') {
                 onSecurityProtocolChange()

routes/admin/auths.go

@@ -7,15 +7,16 @@ package admin
 import (
 	"fmt"
 
+	"strings"
+
 	"github.com/Unknwon/com"
 	"github.com/go-xorm/core"
-	log "gopkg.in/clog.v1"
-
 	"github.com/gogs/gogs/models"
 	"github.com/gogs/gogs/pkg/auth/ldap"
 	"github.com/gogs/gogs/pkg/context"
 	"github.com/gogs/gogs/pkg/form"
 	"github.com/gogs/gogs/pkg/setting"
+	log "gopkg.in/clog.v1"
 )
 
 const (
@@ -51,6 +52,7 @@ var (
 		{models.LoginNames[models.LOGIN_DLDAP], models.LOGIN_DLDAP},
 		{models.LoginNames[models.LOGIN_SMTP], models.LOGIN_SMTP},
 		{models.LoginNames[models.LOGIN_PAM], models.LOGIN_PAM},
+		{models.LoginNames[models.LOGIN_GITHUB], models.LOGIN_GITHUB},
 	}
 	securityProtocols = []dropdownItem{
 		{models.SecurityProtocolNames[ldap.SECURITY_PROTOCOL_UNENCRYPTED], ldap.SECURITY_PROTOCOL_UNENCRYPTED},
@@ -137,6 +139,10 @@ func NewAuthSourcePost(c *context.Context, f form.Authentication) {
 		config = &models.PAMConfig{
 			ServiceName: f.PAMServiceName,
 		}
+	case models.LOGIN_GITHUB:
+		config = &models.GITHUBConfig{
+			ApiEndpoint: f.GithubApiEndpoint,
+		}
 	default:
 		c.Error(400)
 		return
@@ -218,6 +224,14 @@ func EditAuthSourcePost(c *context.Context, f form.Authentication) {
 		config = &models.PAMConfig{
 			ServiceName: f.PAMServiceName,
 		}
+	case models.LOGIN_GITHUB:
+		var apiEndpoint = f.GithubApiEndpoint
+		if !strings.HasSuffix(apiEndpoint, "/") {
+			apiEndpoint += "/"
+		}
+		config = &models.GITHUBConfig{
+			ApiEndpoint: apiEndpoint,
+		}
 	default:
 		c.Error(400)
 		return

templates/admin/auth/edit.tmpl

@@ -168,6 +168,14 @@
 							</div>
 						{{end}}
 
+						<!-- GitHub OAuth 2.0 -->
+						{{if .Source.IsGITHUB}}
+							{{ $cfg:=.Source.GITHUB }}
+							<div class="required field">
+								<label for="github_api_endpoint">{{.i18n.Tr "admin.auths.github_api_endpoint"}}</label>
+								<input id="github_api_endpoint" name="github_api_endpoint" value="{{$cfg.ApiEndpoint}}" placeholder="e.g. https://api.github.com" required>
+							</div>
+						{{end}}
 						<div class="inline field {{if not .Source.IsSMTP}}hide{{end}}">
 							<div class="ui checkbox">
 								<label><strong>{{.i18n.Tr "admin.auths.enable_tls"}}</strong></label>

templates/admin/auth/new.tmpl

@@ -157,7 +157,11 @@
 							<label for="pam_service_name">{{.i18n.Tr "admin.auths.pam_service_name"}}</label>
 							<input id="pam_service_name" name="pam_service_name" value="{{.pam_service_name}}" />
 						</div>
-
+						<!-- GitHub Oauth 2.0 -->
+						<div class="github required field {{if not (eq .type 6)}}hide{{end}}">
+							<label for="github_api_endpoint">{{.i18n.Tr "admin.auths.github_api_endpoint"}}</label>
+							<input id="github_api_endpoint" name="github_api_endpoint" value="{{.github_api_endpoint}}" placeholder="e.g. https://api.github.com" />
+						</div>
 						<div class="ldap field">
 							<div class="ui checkbox">
 								<label><strong>{{.i18n.Tr "admin.auths.attributes_in_bind"}}</strong></label>
@@ -183,6 +187,7 @@
 							</div>
 						</div>
 
+
 						<div class="field">
 							<button class="ui green button">{{.i18n.Tr "admin.auths.new"}}</button>
 						</div>