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// 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/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 (
_ SingleSignOn = &Basic{}
)
// Basic implements the SingleSignOn 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 {
}
// Init does nothing as the Basic implementation does not need to allocate any resources
func (b *Basic) Init() error {
return nil
}
// Free does nothing as the Basic implementation does not have to release any resources
func (b *Basic) Free() error {
return nil
}
// IsEnabled returns true as this plugin is enabled by default and its not possible to disable
// it from settings.
func (b *Basic) IsEnabled() bool {
return true
}
// VerifyAuthData 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) VerifyAuthData(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.IsInternalPath(req) || !middleware.IsAPIPath(req) && !isAttachmentDownload(req) && !isGitRawOrLFSPath(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, err := models.UserSignIn(uname, passwd)
if err != nil {
if !models.IsErrUserNotExist(err) {
log.Error("UserSignIn: %v", err)
}
return nil
}
log.Trace("Basic Authorization: Logged in user %-v", u)
return u
}
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