forgejo/modules/context/context_cookie.go
Gusted b0c5165145
[SECURITY] Rework long-term authentication
- This is a 'front-port' of the already existing patch on v1.21 and
v1.20, but applied on top of what Gitea has done to rework the LTA
mechanism. Forgejo will stick with the reworked mechanism by the Forgejo
Security team for the time being. The removal of legacy code (AES-GCM) has been
left out.
- The current architecture is inherently insecure, because you can
construct the 'secret' cookie value with values that are available in
the database. Thus provides zero protection when a database is
dumped/leaked.
- This patch implements a new architecture that's inspired from: [Paragonie Initiative](https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#secure-remember-me-cookies).
- Integration testing is added to ensure the new mechanism works.
- Removes a setting, because it's not used anymore.

(cherry picked from commit e3d6622a63)
(cherry picked from commit fef1a6dac5)
2023-12-04 12:47:02 +01:00

56 lines
1.7 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package context
import (
"net/http"
"strings"
auth_model "code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/web/middleware"
)
const CookieNameFlash = "gitea_flash"
func removeSessionCookieHeader(w http.ResponseWriter) {
cookies := w.Header()["Set-Cookie"]
w.Header().Del("Set-Cookie")
for _, cookie := range cookies {
if strings.HasPrefix(cookie, setting.SessionConfig.CookieName+"=") {
continue
}
w.Header().Add("Set-Cookie", cookie)
}
}
// SetSiteCookie convenience function to set most cookies consistently
// CSRF and a few others are the exception here
func (ctx *Context) SetSiteCookie(name, value string, maxAge int) {
middleware.SetSiteCookie(ctx.Resp, name, value, maxAge)
}
// DeleteSiteCookie convenience function to delete most cookies consistently
// CSRF and a few others are the exception here
func (ctx *Context) DeleteSiteCookie(name string) {
middleware.SetSiteCookie(ctx.Resp, name, "", -1)
}
// GetSiteCookie returns given cookie value from request header.
func (ctx *Context) GetSiteCookie(name string) string {
return middleware.GetSiteCookie(ctx.Req, name)
}
// SetLTACookie will generate a LTA token and add it as an cookie.
func (ctx *Context) SetLTACookie(u *user_model.User) error {
days := 86400 * setting.LogInRememberDays
lookup, validator, err := auth_model.GenerateAuthToken(ctx, u.ID, timeutil.TimeStampNow().Add(int64(days)))
if err != nil {
return err
}
ctx.SetSiteCookie(setting.CookieRememberName, lookup+":"+validator, days)
return nil
}