forgejo/services/auth/basic.go
zeripath 27b351aba5
Make LDAP be able to skip local 2FA ()
This PR extends  to allow LDAP to be able to be set to skip local 2FA too. The technique used here would be extensible to PAM and SMTP sources.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-09-17 12:43:47 +01:00

125 lines
3.4 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 auth
import (
"net/http"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/web/middleware"
)
// Ensure the struct implements the interface.
var (
_ Method = &Basic{}
_ Named = &Basic{}
)
// Basic implements the Auth interface and authenticates requests (API requests
// only) by looking for Basic authentication data or "x-oauth-basic" token in the "Authorization"
// header.
type Basic struct {
}
// Name represents the name of auth method
func (b *Basic) Name() string {
return "basic"
}
// Verify extracts and validates Basic data (username and password/token) from the
// "Authorization" header of the request and returns the corresponding user object for that
// name/token on successful validation.
// Returns nil if header is empty or validation fails.
func (b *Basic) Verify(req *http.Request, w http.ResponseWriter, store DataStore, sess SessionStore) *models.User {
// Basic authentication should only fire on API, Download or on Git or LFSPaths
if !middleware.IsAPIPath(req) && !isAttachmentDownload(req) && !isGitRawReleaseOrLFSPath(req) {
return nil
}
baHead := req.Header.Get("Authorization")
if len(baHead) == 0 {
return nil
}
auths := strings.SplitN(baHead, " ", 2)
if len(auths) != 2 || (auths[0] != "Basic" && auths[0] != "basic") {
return nil
}
uname, passwd, _ := base.BasicAuthDecode(auths[1])
// Check if username or password is a token
isUsernameToken := len(passwd) == 0 || passwd == "x-oauth-basic"
// Assume username is token
authToken := uname
if !isUsernameToken {
log.Trace("Basic Authorization: Attempting login for: %s", uname)
// Assume password is token
authToken = passwd
} else {
log.Trace("Basic Authorization: Attempting login with username as token")
}
uid := CheckOAuthAccessToken(authToken)
if uid != 0 {
log.Trace("Basic Authorization: Valid OAuthAccessToken for user[%d]", uid)
u, err := models.GetUserByID(uid)
if err != nil {
log.Error("GetUserByID: %v", err)
return nil
}
store.GetData()["IsApiToken"] = true
return u
}
token, err := models.GetAccessTokenBySHA(authToken)
if err == nil {
log.Trace("Basic Authorization: Valid AccessToken for user[%d]", uid)
u, err := models.GetUserByID(token.UID)
if err != nil {
log.Error("GetUserByID: %v", err)
return nil
}
token.UpdatedUnix = timeutil.TimeStampNow()
if err = models.UpdateAccessToken(token); err != nil {
log.Error("UpdateAccessToken: %v", err)
}
store.GetData()["IsApiToken"] = true
return u
} else if !models.IsErrAccessTokenNotExist(err) && !models.IsErrAccessTokenEmpty(err) {
log.Error("GetAccessTokenBySha: %v", err)
}
if !setting.Service.EnableBasicAuth {
return nil
}
log.Trace("Basic Authorization: Attempting SignIn for %s", uname)
u, source, err := UserSignIn(uname, passwd)
if err != nil {
if !models.IsErrUserNotExist(err) {
log.Error("UserSignIn: %v", err)
}
return nil
}
if skipper, ok := source.Cfg.(LocalTwoFASkipper); ok && skipper.IsSkipLocalTwoFA() {
store.GetData()["SkipLocalTwoFA"] = true
}
log.Trace("Basic Authorization: Logged in user %-v", u)
return u
}