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gitea/routers/web/auth/linkaccount.go
wxiaoguang bffbbf5470
Improve oauth2 client "preferred username field" logic and the error handling (#30622)
Follow #30454
And fix #24957

When using "preferred_username", if no such field,
`extractUserNameFromOAuth2` (old `getUserName`) shouldn't return an
error. All other USERNAME options do not return such error.

And fine tune some logic and error messages, make code more stable and
more friendly to end users.
2024-04-25 11:22:32 +00:00

310 lines
11 KiB
Go

// 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/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"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/context"
"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, ok := ctx.Session.Get("linkAccountGothUser").(goth.User)
if !ok {
// no account in session, so just redirect to the login page, then the user could restart the process
ctx.Redirect(setting.AppSubURL + "/user/login")
return
}
if missingFields, ok := gothUser.RawData["__giteaAutoRegMissingFields"].([]string); ok {
ctx.Data["AutoRegistrationFailedPrompt"] = ctx.Tr("auth.oauth_callback_unable_auto_reg", gothUser.Provider, strings.Join(missingFields, ","))
}
uname, err := extractUserNameFromOAuth2(&gothUser)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
email := gothUser.Email
ctx.Data["user_name"] = uname
ctx.Data["email"] = email
if email != "" {
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 uname != "" {
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)
}
func handleSignInError(ctx *context.Context, userName string, ptrForm any, tmpl base.TplName, invoker string, err error) {
if errors.Is(err, util.ErrNotExist) {
ctx.RenderWithErr(ctx.Tr("form.username_password_incorrect"), tmpl, ptrForm)
} else if errors.Is(err, util.ErrInvalidArgument) {
ctx.Data["user_exists"] = true
ctx.RenderWithErr(ctx.Tr("form.username_password_incorrect"), tmpl, ptrForm)
} else if user_model.IsErrUserProhibitLogin(err) {
ctx.Data["user_exists"] = true
log.Info("Failed authentication attempt for %s from %s: %v", userName, ctx.RemoteAddr(), err)
ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
} else if user_model.IsErrUserInactive(err) {
ctx.Data["user_exists"] = true
if setting.Service.RegisterEmailConfirm {
ctx.Data["Title"] = ctx.Tr("auth.active_your_account")
ctx.HTML(http.StatusOK, TplActivate)
} else {
log.Info("Failed authentication attempt for %s from %s: %v", userName, ctx.RemoteAddr(), err)
ctx.Data["Title"] = ctx.Tr("auth.prohibit_login")
ctx.HTML(http.StatusOK, "user/auth/prohibit_login")
}
} else {
ctx.ServerError(invoker, err)
}
}
// 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(ctx, signInForm.UserName, signInForm.Password)
if err != nil {
handleSignInError(ctx, signInForm.UserName, &signInForm, tplLinkAccount, "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(ctx, 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(ctx, u.ID)
if err != nil {
if !auth.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("UserLinkAccount", err)
return
}
err = externalaccount.LinkAccountToUser(ctx, u, gothUser)
if err != nil {
ctx.ServerError("UserLinkAccount", err)
return
}
handleSignIn(ctx, u, remember)
return
}
if err := updateSession(ctx, nil, map[string]any{
// 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(ctx, 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(ctx, 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)
}