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linkaccount.go
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linkaccount.go
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// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package auth
import (
"errors"
"fmt"
"net/http"
"strings"
"code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/web"
auth_service "code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/oauth2"
"code.gitea.io/gitea/services/externalaccount"
"code.gitea.io/gitea/services/forms"
"github.com/markbates/goth"
)
var tplLinkAccount base.TplName = "user/auth/link_account"
// LinkAccount shows the page where the user can decide to login or create a new account
func LinkAccount(ctx *context.Context) {
ctx.Data["DisablePassword"] = !setting.Service.RequireExternalRegistrationPassword || setting.Service.AllowOnlyExternalRegistration
ctx.Data["Title"] = ctx.Tr("link_account")
ctx.Data["LinkAccountMode"] = true
ctx.Data["EnableCaptcha"] = setting.Service.EnableCaptcha && setting.Service.RequireExternalRegistrationCaptcha
ctx.Data["Captcha"] = context.GetImageCaptcha()
ctx.Data["CaptchaType"] = setting.Service.CaptchaType
ctx.Data["RecaptchaURL"] = setting.Service.RecaptchaURL
ctx.Data["RecaptchaSitekey"] = setting.Service.RecaptchaSitekey
ctx.Data["HcaptchaSitekey"] = setting.Service.HcaptchaSitekey
ctx.Data["McaptchaSitekey"] = setting.Service.McaptchaSitekey
ctx.Data["McaptchaURL"] = setting.Service.McaptchaURL
ctx.Data["DisableRegistration"] = setting.Service.DisableRegistration
ctx.Data["AllowOnlyInternalRegistration"] = setting.Service.AllowOnlyInternalRegistration
ctx.Data["ShowRegistrationButton"] = false
// use this to set the right link into the signIn and signUp templates in the link_account template
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUser := ctx.Session.Get("linkAccountGothUser")
if gothUser == nil {
ctx.ServerError("UserSignIn", errors.New("not in LinkAccount session"))
return
}
gu, _ := gothUser.(goth.User)
uname := getUserName(&gu)
email := gu.Email
ctx.Data["user_name"] = uname
ctx.Data["email"] = email
if len(email) != 0 {
u, err := user_model.GetUserByEmail(ctx, email)
if err != nil && !user_model.IsErrUserNotExist(err) {
ctx.ServerError("UserSignIn", err)
return
}
if u != nil {
ctx.Data["user_exists"] = true
}
} else if len(uname) != 0 {
u, err := user_model.GetUserByName(ctx, uname)
if err != nil && !user_model.IsErrUserNotExist(err) {
ctx.ServerError("UserSignIn", err)
return
}
if u != nil {
ctx.Data["user_exists"] = true
}
}
ctx.HTML(http.StatusOK, tplLinkAccount)
}
// LinkAccountPostSignIn handle the coupling of external account with another account using signIn
func LinkAccountPostSignIn(ctx *context.Context) {
signInForm := web.GetForm(ctx).(*forms.SignInForm)
ctx.Data["DisablePassword"] = !setting.Service.RequireExternalRegistrationPassword || setting.Service.AllowOnlyExternalRegistration
ctx.Data["Title"] = ctx.Tr("link_account")
ctx.Data["LinkAccountMode"] = true
ctx.Data["LinkAccountModeSignIn"] = true
ctx.Data["EnableCaptcha"] = setting.Service.EnableCaptcha && setting.Service.RequireExternalRegistrationCaptcha
ctx.Data["RecaptchaURL"] = setting.Service.RecaptchaURL
ctx.Data["Captcha"] = context.GetImageCaptcha()
ctx.Data["CaptchaType"] = setting.Service.CaptchaType
ctx.Data["RecaptchaSitekey"] = setting.Service.RecaptchaSitekey
ctx.Data["HcaptchaSitekey"] = setting.Service.HcaptchaSitekey
ctx.Data["McaptchaSitekey"] = setting.Service.McaptchaSitekey
ctx.Data["McaptchaURL"] = setting.Service.McaptchaURL
ctx.Data["DisableRegistration"] = setting.Service.DisableRegistration
ctx.Data["ShowRegistrationButton"] = false
// use this to set the right link into the signIn and signUp templates in the link_account template
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUser := ctx.Session.Get("linkAccountGothUser")
if gothUser == nil {
ctx.ServerError("UserSignIn", errors.New("not in LinkAccount session"))
return
}
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplLinkAccount)
return
}
u, _, err := auth_service.UserSignIn(signInForm.UserName, signInForm.Password)
if err != nil {
if user_model.IsErrUserNotExist(err) {
ctx.Data["user_exists"] = true
ctx.RenderWithErr(ctx.Tr("form.username_password_incorrect"), tplLinkAccount, &signInForm)
} else {
ctx.ServerError("UserLinkAccount", err)
}
return
}
linkAccount(ctx, u, gothUser.(goth.User), signInForm.Remember)
}
func linkAccount(ctx *context.Context, u *user_model.User, gothUser goth.User, remember bool) {
updateAvatarIfNeed(gothUser.AvatarURL, u)
// If this user is enrolled in 2FA, we can't sign the user in just yet.
// Instead, redirect them to the 2FA authentication page.
// We deliberately ignore the skip local 2fa setting here because we are linking to a previous user here
_, err := auth.GetTwoFactorByUID(u.ID)
if err != nil {
if !auth.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("UserLinkAccount", err)
return
}
err = externalaccount.LinkAccountToUser(u, gothUser)
if err != nil {
ctx.ServerError("UserLinkAccount", err)
return
}
handleSignIn(ctx, u, remember)
return
}
if err := updateSession(ctx, nil, map[string]interface{}{
// User needs to use 2FA, save data and redirect to 2FA page.
"twofaUid": u.ID,
"twofaRemember": remember,
"linkAccount": true,
}); err != nil {
ctx.ServerError("RegenerateSession", err)
return
}
// If WebAuthn is enrolled -> Redirect to WebAuthn instead
regs, err := auth.GetWebAuthnCredentialsByUID(u.ID)
if err == nil && len(regs) > 0 {
ctx.Redirect(setting.AppSubURL + "/user/webauthn")
return
}
ctx.Redirect(setting.AppSubURL + "/user/two_factor")
}
// LinkAccountPostRegister handle the creation of a new account for an external account using signUp
func LinkAccountPostRegister(ctx *context.Context) {
form := web.GetForm(ctx).(*forms.RegisterForm)
// TODO Make insecure passwords optional for local accounts also,
// once email-based Second-Factor Auth is available
ctx.Data["DisablePassword"] = !setting.Service.RequireExternalRegistrationPassword || setting.Service.AllowOnlyExternalRegistration
ctx.Data["Title"] = ctx.Tr("link_account")
ctx.Data["LinkAccountMode"] = true
ctx.Data["LinkAccountModeRegister"] = true
ctx.Data["EnableCaptcha"] = setting.Service.EnableCaptcha && setting.Service.RequireExternalRegistrationCaptcha
ctx.Data["RecaptchaURL"] = setting.Service.RecaptchaURL
ctx.Data["Captcha"] = context.GetImageCaptcha()
ctx.Data["CaptchaType"] = setting.Service.CaptchaType
ctx.Data["RecaptchaSitekey"] = setting.Service.RecaptchaSitekey
ctx.Data["HcaptchaSitekey"] = setting.Service.HcaptchaSitekey
ctx.Data["McaptchaSitekey"] = setting.Service.McaptchaSitekey
ctx.Data["McaptchaURL"] = setting.Service.McaptchaURL
ctx.Data["DisableRegistration"] = setting.Service.DisableRegistration
ctx.Data["ShowRegistrationButton"] = false
// use this to set the right link into the signIn and signUp templates in the link_account template
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUserInterface := ctx.Session.Get("linkAccountGothUser")
if gothUserInterface == nil {
ctx.ServerError("UserSignUp", errors.New("not in LinkAccount session"))
return
}
gothUser, ok := gothUserInterface.(goth.User)
if !ok {
ctx.ServerError("UserSignUp", fmt.Errorf("session linkAccountGothUser type is %t but not goth.User", gothUserInterface))
return
}
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplLinkAccount)
return
}
if setting.Service.DisableRegistration || setting.Service.AllowOnlyInternalRegistration {
ctx.Error(http.StatusForbidden)
return
}
if setting.Service.EnableCaptcha && setting.Service.RequireExternalRegistrationCaptcha {
context.VerifyCaptcha(ctx, tplLinkAccount, form)
if ctx.Written() {
return
}
}
if !form.IsEmailDomainAllowed() {
ctx.RenderWithErr(ctx.Tr("auth.email_domain_blacklisted"), tplLinkAccount, &form)
return
}
if setting.Service.AllowOnlyExternalRegistration || !setting.Service.RequireExternalRegistrationPassword {
// In user_model.User an empty password is classed as not set, so we set form.Password to empty.
// Eventually the database should be changed to indicate "Second Factor"-enabled accounts
// (accounts that do not introduce the security vulnerabilities of a password).
// If a user decides to circumvent second-factor security, and purposefully create a password,
// they can still do so using the "Recover Account" option.
form.Password = ""
} else {
if (len(strings.TrimSpace(form.Password)) > 0 || len(strings.TrimSpace(form.Retype)) > 0) && form.Password != form.Retype {
ctx.Data["Err_Password"] = true
ctx.RenderWithErr(ctx.Tr("form.password_not_match"), tplLinkAccount, &form)
return
}
if len(strings.TrimSpace(form.Password)) > 0 && len(form.Password) < setting.MinPasswordLength {
ctx.Data["Err_Password"] = true
ctx.RenderWithErr(ctx.Tr("auth.password_too_short", setting.MinPasswordLength), tplLinkAccount, &form)
return
}
}
authSource, err := auth.GetActiveOAuth2SourceByName(gothUser.Provider)
if err != nil {
ctx.ServerError("CreateUser", err)
return
}
u := &user_model.User{
Name: form.UserName,
Email: form.Email,
Passwd: form.Password,
LoginType: auth.OAuth2,
LoginSource: authSource.ID,
LoginName: gothUser.UserID,
}
if !createAndHandleCreatedUser(ctx, tplLinkAccount, form, u, nil, &gothUser, false) {
// error already handled
return
}
source := authSource.Cfg.(*oauth2.Source)
if err := syncGroupsToTeams(ctx, source, &gothUser, u); err != nil {
ctx.ServerError("SyncGroupsToTeams", err)
return
}
handleSignIn(ctx, u, false)
}