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Implement logout redirection for reverse proxy auth setups (#36085) (#37171)

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Backport #36085 by @eliroca

When authentication is handled externally by a reverse proxy SSO
provider, users can be redirected to an external logout URL or relative
path defined on the reverse proxy.

Co-authored-by: Elisei Roca <eroca@suse.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Giteabot
2026-04-11 00:49:55 +08:00
committed by GitHub
parent fc5e0ec877
commit 7a7376dfc8
4 changed files with 37 additions and 8 deletions
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5
custom/conf/app.example.ini
View File

@@ -461,6 +461,11 @@ INTERNAL_TOKEN =
;; Name of cookie used to store authentication information.
;COOKIE_REMEMBER_NAME = gitea_incredible
;;
;; URL or path that Gitea should redirect users to *after* performing its own logout.
;; Use this, if needed, when authentication is handled by a reverse proxy or SSO.
;; For example: "/my-sso/logout?return=/my-sso/home"
;REVERSE_PROXY_LOGOUT_REDIRECT =
;;
;; Reverse proxy authentication header name of user name, email, and full name
;REVERSE_PROXY_AUTHENTICATION_USER = X-WEBAUTH-USER
;REVERSE_PROXY_AUTHENTICATION_EMAIL = X-WEBAUTH-EMAIL

2
modules/setting/security.go
View File

@@ -31,6 +31,7 @@ var (
ReverseProxyAuthEmail string
ReverseProxyAuthFullName string
ReverseProxyLimit int
ReverseProxyLogoutRedirect string
ReverseProxyTrustedProxies []string
MinPasswordLength int
ImportLocalPaths bool
@@ -124,6 +125,7 @@ func loadSecurityFrom(rootCfg ConfigProvider) {
ReverseProxyAuthFullName = sec.Key("REVERSE_PROXY_AUTHENTICATION_FULL_NAME").MustString("X-WEBAUTH-FULLNAME")
ReverseProxyLimit = sec.Key("REVERSE_PROXY_LIMIT").MustInt(1)
ReverseProxyLogoutRedirect = sec.Key("REVERSE_PROXY_LOGOUT_REDIRECT").String()
ReverseProxyTrustedProxies = sec.Key("REVERSE_PROXY_TRUSTED_PROXIES").Strings(",")
if len(ReverseProxyTrustedProxies) == 0 {
ReverseProxyTrustedProxies = []string{"127.0.0.0/8", "::1/128"}

7
routers/web/auth/auth.go
View File

@@ -493,12 +493,17 @@ func SignOut(ctx *context.Context) {
}
func buildSignOutRedirectURL(ctx *context.Context) string {
// TODO: can also support REVERSE_PROXY_AUTHENTICATION logout URL in the future
if ctx.Doer != nil && ctx.Doer.LoginType == auth.OAuth2 {
if s := buildOIDCEndSessionURL(ctx, ctx.Doer); s != "" {
return s
}
}
// The assumption is: if reverse proxy auth is enabled, then the users should only sign-in via reverse proxy auth.
// TODO: in the future, if we need to distinguish different sign-in methods, we need to save the sign-in method in session and check here
if setting.Service.EnableReverseProxyAuth && setting.ReverseProxyLogoutRedirect != "" {
return setting.ReverseProxyLogoutRedirect
}
return setting.AppSubURL + "/"
}

31
tests/integration/signout_test.go
View File

@@ -7,6 +7,7 @@ import (
"net/http"
"testing"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/test"
"code.gitea.io/gitea/tests"
@@ -16,13 +17,29 @@ import (
func TestSignOut(t *testing.T) {
defer tests.PrepareTestEnv(t)()
session := loginUser(t, "user2")
t.Run("NormalLogout", func(t *testing.T) {
session := loginUser(t, "user2")
req := NewRequest(t, "GET", "/user/logout")
resp := session.MakeRequest(t, req, http.StatusSeeOther)
assert.Equal(t, "/", test.RedirectURL(resp))
req := NewRequest(t, "GET", "/user/logout")
resp := session.MakeRequest(t, req, http.StatusSeeOther)
assert.Equal(t, "/", resp.Header().Get("Location"))
// try to view a private repo, should fail
req = NewRequest(t, "GET", "/user2/repo2")
session.MakeRequest(t, req, http.StatusNotFound)
// logged out, try to view a private repo, should fail
req = NewRequest(t, "GET", "/user2/repo2")
session.MakeRequest(t, req, http.StatusNotFound)
})
t.Run("ReverseProxyLogoutRedirect", func(t *testing.T) {
defer test.MockVariableValue(&setting.Service.EnableReverseProxyAuth, true)()
defer test.MockVariableValue(&setting.ReverseProxyLogoutRedirect, "/my-sso/logout?return_to=/my-sso/home")()
session := loginUser(t, "user2")
req := NewRequest(t, "GET", "/user/logout")
resp := session.MakeRequest(t, req, http.StatusSeeOther)
assert.Equal(t, "/my-sso/logout?return_to=/my-sso/home", resp.Header().Get("Location"))
// logged out, try to view a private repo, should fail
req = NewRequest(t, "GET", "/user2/repo2")
session.MakeRequest(t, req, http.StatusNotFound)
})
}