forgejo/modules/auth/sso/reverseproxy.go
zeripath a2df265476
Add trace logging to SSO methods (#15803)
It is currenly impossible to detect which "SSO" method is responsible for login. This
PR adds some basic trace logging to these methods.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-05-09 18:04:53 +02:00

117 lines
3.6 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 (
"net/http"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
gouuid "github.com/google/uuid"
)
// Ensure the struct implements the interface.
var (
_ SingleSignOn = &ReverseProxy{}
)
// ReverseProxy implements the SingleSignOn interface, but actually relies on
// a reverse proxy for authentication of users.
// On successful authentication the proxy is expected to populate the username in the
// "setting.ReverseProxyAuthUser" header. Optionally it can also populate the email of the
// user in the "setting.ReverseProxyAuthEmail" header.
type ReverseProxy struct {
}
// getUserName extracts the username from the "setting.ReverseProxyAuthUser" header
func (r *ReverseProxy) getUserName(req *http.Request) string {
webAuthUser := strings.TrimSpace(req.Header.Get(setting.ReverseProxyAuthUser))
if len(webAuthUser) == 0 {
return ""
}
return webAuthUser
}
// Init does nothing as the ReverseProxy implementation does not need initialization
func (r *ReverseProxy) Init() error {
return nil
}
// Free does nothing as the ReverseProxy implementation does not have to release resources
func (r *ReverseProxy) Free() error {
return nil
}
// IsEnabled checks if EnableReverseProxyAuth setting is true
func (r *ReverseProxy) IsEnabled() bool {
return setting.Service.EnableReverseProxyAuth
}
// VerifyAuthData extracts the username from the "setting.ReverseProxyAuthUser" header
// of the request and returns the corresponding user object for that name.
// Verification of header data is not performed as it should have already been done by
// the revese proxy.
// If a username is available in the "setting.ReverseProxyAuthUser" header an existing
// user object is returned (populated with username or email found in header).
// Returns nil if header is empty.
func (r *ReverseProxy) VerifyAuthData(req *http.Request, w http.ResponseWriter, store DataStore, sess SessionStore) *models.User {
username := r.getUserName(req)
if len(username) == 0 {
return nil
}
log.Trace("ReverseProxy Authorization: Found username: %s", username)
user, err := models.GetUserByName(username)
if err != nil {
if models.IsErrUserNotExist(err) && r.isAutoRegisterAllowed() {
return r.newUser(req)
}
log.Error("GetUserByName: %v", err)
return nil
}
log.Trace("ReverseProxy Authorization: Logged in user %-v", user)
return user
}
// isAutoRegisterAllowed checks if EnableReverseProxyAutoRegister setting is true
func (r *ReverseProxy) isAutoRegisterAllowed() bool {
return setting.Service.EnableReverseProxyAutoRegister
}
// newUser creates a new user object for the purpose of automatic registration
// and populates its name and email with the information present in request headers.
func (r *ReverseProxy) newUser(req *http.Request) *models.User {
username := r.getUserName(req)
if len(username) == 0 {
return nil
}
email := gouuid.New().String() + "@localhost"
if setting.Service.EnableReverseProxyEmail {
webAuthEmail := req.Header.Get(setting.ReverseProxyAuthEmail)
if len(webAuthEmail) > 0 {
email = webAuthEmail
}
}
user := &models.User{
Name: username,
Email: email,
Passwd: username,
IsActive: true,
}
if err := models.CreateUser(user); err != nil {
// FIXME: should I create a system notice?
log.Error("CreateUser: %v", err)
return nil
}
return user
}