Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 308 insertions, 0 deletions

diff --git a/routers/web/auth/linkaccount.go b/routers/web/auth/linkaccount.go
new file mode 100644
index 0000000..9b0141c
--- /dev/null
+++ b/routers/web/auth/linkaccount.go
@@ -0,0 +1,308 @@
+// 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["CfTurnstileSitekey"] = setting.Service.CfTurnstileSitekey
+	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, err := getUserName(&gu)
+	if err != nil {
+		ctx.ServerError("UserSignIn", err)
+		return
+	}
+	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)
+}
+
+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["CfTurnstileSitekey"] = setting.Service.CfTurnstileSitekey
+	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["CfTurnstileSitekey"] = setting.Service.CfTurnstileSitekey
+	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)
+}