126 lines
3.9 KiB
Go
126 lines
3.9 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package auth
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import (
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"net/http"
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"strings"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/web/middleware"
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gouuid "github.com/google/uuid"
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)
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// Ensure the struct implements the interface.
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var (
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_ Auth = &ReverseProxy{}
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)
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// ReverseProxy implements the Auth interface, but actually relies on
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// a reverse proxy for authentication of users.
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// On successful authentication the proxy is expected to populate the username in the
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// "setting.ReverseProxyAuthUser" header. Optionally it can also populate the email of the
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// user in the "setting.ReverseProxyAuthEmail" header.
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type ReverseProxy struct {
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}
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// getUserName extracts the username from the "setting.ReverseProxyAuthUser" header
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func (r *ReverseProxy) getUserName(req *http.Request) string {
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webAuthUser := strings.TrimSpace(req.Header.Get(setting.ReverseProxyAuthUser))
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if len(webAuthUser) == 0 {
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return ""
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}
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return webAuthUser
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}
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// Name represents the name of auth method
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func (r *ReverseProxy) Name() string {
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return "reverse_proxy"
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}
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// Init does nothing as the ReverseProxy implementation does not need initialization
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func (r *ReverseProxy) Init() error {
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return nil
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}
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// Free does nothing as the ReverseProxy implementation does not have to release resources
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func (r *ReverseProxy) Free() error {
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return nil
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}
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// Verify extracts the username from the "setting.ReverseProxyAuthUser" header
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// of the request and returns the corresponding user object for that name.
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// Verification of header data is not performed as it should have already been done by
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// the revese proxy.
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// If a username is available in the "setting.ReverseProxyAuthUser" header an existing
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// user object is returned (populated with username or email found in header).
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// Returns nil if header is empty.
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func (r *ReverseProxy) Verify(req *http.Request, w http.ResponseWriter, store DataStore, sess SessionStore) *models.User {
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username := r.getUserName(req)
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if len(username) == 0 {
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return nil
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}
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log.Trace("ReverseProxy Authorization: Found username: %s", username)
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user, err := models.GetUserByName(username)
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if err != nil {
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if !models.IsErrUserNotExist(err) || !r.isAutoRegisterAllowed() {
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log.Error("GetUserByName: %v", err)
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return nil
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}
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user = r.newUser(req)
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}
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// Make sure requests to API paths, attachment downloads, git and LFS do not create a new session
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if !middleware.IsAPIPath(req) && !isAttachmentDownload(req) && !isGitRawOrLFSPath(req) {
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if sess != nil && (sess.Get("uid") == nil || sess.Get("uid").(int64) != user.ID) {
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handleSignIn(w, req, sess, user)
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}
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}
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store.GetData()["IsReverseProxy"] = true
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log.Trace("ReverseProxy Authorization: Logged in user %-v", user)
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return user
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}
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// isAutoRegisterAllowed checks if EnableReverseProxyAutoRegister setting is true
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func (r *ReverseProxy) isAutoRegisterAllowed() bool {
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return setting.Service.EnableReverseProxyAutoRegister
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}
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// newUser creates a new user object for the purpose of automatic registration
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// and populates its name and email with the information present in request headers.
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func (r *ReverseProxy) newUser(req *http.Request) *models.User {
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username := r.getUserName(req)
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if len(username) == 0 {
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return nil
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}
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email := gouuid.New().String() + "@localhost"
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if setting.Service.EnableReverseProxyEmail {
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webAuthEmail := req.Header.Get(setting.ReverseProxyAuthEmail)
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if len(webAuthEmail) > 0 {
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email = webAuthEmail
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}
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}
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user := &models.User{
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Name: username,
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Email: email,
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IsActive: true,
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}
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if err := models.CreateUser(user); err != nil {
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// FIXME: should I create a system notice?
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log.Error("CreateUser: %v", err)
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return nil
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}
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return user
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}
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