forgejo/modules/auth/sso/sso.go
zeripath 6d6a65cf5c
Allow Token/Basic auth on raw paths (#15987)
It appears that people have been using token authentication to navigate to raw paths
and recent changes have broken this. Whilst ideally these paths would not be being used
like this - it was not the intention to be a breaking change.

This PR restores access to these paths.

Fix #13772

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-05-27 19:46:11 +01:00

154 lines
4.6 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package sso
import (
"fmt"
"net/http"
"reflect"
"regexp"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/web/middleware"
)
// ssoMethods contains the list of SSO authentication plugins in the order they are expected to be
// executed.
//
// The OAuth2 plugin is expected to be executed first, as it must ignore the user id stored
// in the session (if there is a user id stored in session other plugins might return the user
// object for that id).
//
// The Session plugin is expected to be executed second, in order to skip authentication
// for users that have already signed in.
var ssoMethods = []SingleSignOn{
&OAuth2{},
&Basic{},
&Session{},
&ReverseProxy{},
}
// The purpose of the following three function variables is to let the linter know that
// those functions are not dead code and are actually being used
var (
_ = handleSignIn
)
// Methods returns the instances of all registered SSO methods
func Methods() []SingleSignOn {
return ssoMethods
}
// Register adds the specified instance to the list of available SSO methods
func Register(method SingleSignOn) {
ssoMethods = append(ssoMethods, method)
}
// Init should be called exactly once when the application starts to allow SSO plugins
// to allocate necessary resources
func Init() {
for _, method := range Methods() {
err := method.Init()
if err != nil {
log.Error("Could not initialize '%s' SSO method, error: %s", reflect.TypeOf(method).String(), err)
}
}
}
// Free should be called exactly once when the application is terminating to allow SSO plugins
// to release necessary resources
func Free() {
for _, method := range Methods() {
err := method.Free()
if err != nil {
log.Error("Could not free '%s' SSO method, error: %s", reflect.TypeOf(method).String(), err)
}
}
}
// SessionUser returns the user object corresponding to the "uid" session variable.
func SessionUser(sess SessionStore) *models.User {
// Get user ID
uid := sess.Get("uid")
if uid == nil {
return nil
}
log.Trace("Session Authorization: Found user[%d]", uid)
id, ok := uid.(int64)
if !ok {
return nil
}
// Get user object
user, err := models.GetUserByID(id)
if err != nil {
if !models.IsErrUserNotExist(err) {
log.Error("GetUserById: %v", err)
}
return nil
}
log.Trace("Session Authorization: Logged in user %-v", user)
return user
}
// isAttachmentDownload check if request is a file download (GET) with URL to an attachment
func isAttachmentDownload(req *http.Request) bool {
return strings.HasPrefix(req.URL.Path, "/attachments/") && req.Method == "GET"
}
var gitRawPathRe = regexp.MustCompile(`^/[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+/(?:(?:git-(?:(?:upload)|(?:receive))-pack$)|(?:info/refs$)|(?:HEAD$)|(?:objects/)|raw/)`)
var lfsPathRe = regexp.MustCompile(`^/[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+/info/lfs/`)
func isGitRawOrLFSPath(req *http.Request) bool {
if gitRawPathRe.MatchString(req.URL.Path) {
return true
}
if setting.LFS.StartServer {
return lfsPathRe.MatchString(req.URL.Path)
}
return false
}
// handleSignIn clears existing session variables and stores new ones for the specified user object
func handleSignIn(resp http.ResponseWriter, req *http.Request, sess SessionStore, user *models.User) {
_ = sess.Delete("openid_verified_uri")
_ = sess.Delete("openid_signin_remember")
_ = sess.Delete("openid_determined_email")
_ = sess.Delete("openid_determined_username")
_ = sess.Delete("twofaUid")
_ = sess.Delete("twofaRemember")
_ = sess.Delete("u2fChallenge")
_ = sess.Delete("linkAccount")
err := sess.Set("uid", user.ID)
if err != nil {
log.Error(fmt.Sprintf("Error setting session: %v", err))
}
err = sess.Set("uname", user.Name)
if err != nil {
log.Error(fmt.Sprintf("Error setting session: %v", err))
}
// Language setting of the user overwrites the one previously set
// If the user does not have a locale set, we save the current one.
if len(user.Language) == 0 {
lc := middleware.Locale(resp, req)
user.Language = lc.Language()
if err := models.UpdateUserCols(user, "language"); err != nil {
log.Error(fmt.Sprintf("Error updating user language [user: %d, locale: %s]", user.ID, user.Language))
return
}
}
middleware.SetLocaleCookie(resp, user.Language, 0)
// Clear whatever CSRF has right now, force to generate a new one
middleware.DeleteCSRFCookie(resp)
}