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login.go
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login.go
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// Copyright 2014 The Gogs 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 models
import (
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"net/smtp"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/go-xorm/core"
"github.com/go-xorm/xorm"
"github.com/gogits/gogs/modules/auth/ldap"
"github.com/gogits/gogs/modules/auth/pam"
"github.com/gogits/gogs/modules/log"
)
type LoginType int
// Note: new type must be added at the end of list to maintain compatibility.
const (
NOTYPE LoginType = iota
PLAIN
LDAP
SMTP
PAM
DLDAP
)
var (
ErrAuthenticationAlreadyExist = errors.New("Authentication already exist")
ErrAuthenticationUserUsed = errors.New("Authentication has been used by some users")
)
var LoginNames = map[LoginType]string{
LDAP: "LDAP (via BindDN)",
DLDAP: "LDAP (simple auth)",
SMTP: "SMTP",
PAM: "PAM",
}
// Ensure structs implemented interface.
var (
_ core.Conversion = &LDAPConfig{}
_ core.Conversion = &SMTPConfig{}
_ core.Conversion = &PAMConfig{}
)
type LDAPConfig struct {
*ldap.Source
}
func (cfg *LDAPConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, &cfg)
}
func (cfg *LDAPConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
type SMTPConfig struct {
Auth string
Host string
Port int
AllowedDomains string `xorm:"TEXT"`
TLS bool
SkipVerify bool
}
func (cfg *SMTPConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, cfg)
}
func (cfg *SMTPConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
type PAMConfig struct {
ServiceName string // pam service (e.g. system-auth)
}
func (cfg *PAMConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, &cfg)
}
func (cfg *PAMConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
type LoginSource struct {
ID int64 `xorm:"pk autoincr"`
Type LoginType
Name string `xorm:"UNIQUE"`
IsActived bool `xorm:"NOT NULL DEFAULT false"`
Cfg core.Conversion `xorm:"TEXT"`
Created time.Time `xorm:"CREATED"`
Updated time.Time `xorm:"UPDATED"`
}
func (source *LoginSource) BeforeSet(colName string, val xorm.Cell) {
switch colName {
case "type":
switch LoginType((*val).(int64)) {
case LDAP, DLDAP:
source.Cfg = new(LDAPConfig)
case SMTP:
source.Cfg = new(SMTPConfig)
case PAM:
source.Cfg = new(PAMConfig)
default:
panic("unrecognized login source type: " + com.ToStr(*val))
}
}
}
func (source *LoginSource) TypeName() string {
return LoginNames[source.Type]
}
func (source *LoginSource) IsLDAP() bool {
return source.Type == LDAP
}
func (source *LoginSource) IsDLDAP() bool {
return source.Type == DLDAP
}
func (source *LoginSource) IsSMTP() bool {
return source.Type == SMTP
}
func (source *LoginSource) IsPAM() bool {
return source.Type == PAM
}
func (source *LoginSource) UseTLS() bool {
switch source.Type {
case LDAP, DLDAP:
return source.LDAP().UseSSL
case SMTP:
return source.SMTP().TLS
}
return false
}
func (source *LoginSource) SkipVerify() bool {
switch source.Type {
case LDAP, DLDAP:
return source.LDAP().SkipVerify
case SMTP:
return source.SMTP().SkipVerify
}
return false
}
func (source *LoginSource) LDAP() *LDAPConfig {
return source.Cfg.(*LDAPConfig)
}
func (source *LoginSource) SMTP() *SMTPConfig {
return source.Cfg.(*SMTPConfig)
}
func (source *LoginSource) PAM() *PAMConfig {
return source.Cfg.(*PAMConfig)
}
// CountLoginSources returns number of login sources.
func CountLoginSources() int64 {
count, _ := x.Count(new(LoginSource))
return count
}
func CreateSource(source *LoginSource) error {
_, err := x.Insert(source)
return err
}
func LoginSources() ([]*LoginSource, error) {
auths := make([]*LoginSource, 0, 5)
return auths, x.Find(&auths)
}
// GetLoginSourceByID returns login source by given ID.
func GetLoginSourceByID(id int64) (*LoginSource, error) {
source := new(LoginSource)
has, err := x.Id(id).Get(source)
if err != nil {
return nil, err
} else if !has {
return nil, ErrAuthenticationNotExist{id}
}
return source, nil
}
func UpdateSource(source *LoginSource) error {
_, err := x.Id(source.ID).AllCols().Update(source)
return err
}
func DeleteSource(source *LoginSource) error {
count, err := x.Count(&User{LoginSource: source.ID})
if err != nil {
return err
} else if count > 0 {
return ErrAuthenticationUserUsed
}
_, err = x.Id(source.ID).Delete(new(LoginSource))
return err
}
// .____ ________ _____ __________
// | | \______ \ / _ \\______ \
// | | | | \ / /_\ \| ___/
// | |___ | ` \/ | \ |
// |_______ \/_______ /\____|__ /____|
// \/ \/ \/
// LoginUserLDAPSource queries if loginName/passwd can login against the LDAP directory pool,
// and create a local user if success when enabled.
// It returns the same LoginUserPlain semantic.
func LoginUserLDAPSource(u *User, loginName, passwd string, source *LoginSource, autoRegister bool) (*User, error) {
cfg := source.Cfg.(*LDAPConfig)
directBind := (source.Type == DLDAP)
name, fn, sn, mail, admin, logged := cfg.SearchEntry(loginName, passwd, directBind)
if !logged {
// User not in LDAP, do nothing
return nil, ErrUserNotExist{0, loginName}
}
if !autoRegister {
return u, nil
}
// Fallback.
if len(name) == 0 {
name = loginName
}
if len(mail) == 0 {
mail = fmt.Sprintf("%s@localhost", name)
}
u = &User{
LowerName: strings.ToLower(name),
Name: name,
FullName: composeFullName(fn, sn, name),
LoginType: source.Type,
LoginSource: source.ID,
LoginName: loginName,
Email: mail,
IsAdmin: admin,
IsActive: true,
}
return u, CreateUser(u)
}
func composeFullName(firstName, surename, userName string) string {
switch {
case len(firstName) == 0 && len(surename) == 0:
return userName
case len(firstName) == 0:
return surename
case len(surename) == 0:
return firstName
default:
return firstName + " " + surename
}
}
// _________ __________________________
// / _____/ / \__ ___/\______ \
// \_____ \ / \ / \| | | ___/
// / \/ Y \ | | |
// /_______ /\____|__ /____| |____|
// \/ \/
type loginAuth struct {
username, password string
}
func LoginAuth(username, password string) smtp.Auth {
return &loginAuth{username, password}
}
func (a *loginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {
return "LOGIN", []byte(a.username), nil
}
func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
if more {
switch string(fromServer) {
case "Username:":
return []byte(a.username), nil
case "Password:":
return []byte(a.password), nil
}
}
return nil, nil
}
const (
SMTP_PLAIN = "PLAIN"
SMTP_LOGIN = "LOGIN"
)
var SMTPAuths = []string{SMTP_PLAIN, SMTP_LOGIN}
func SMTPAuth(a smtp.Auth, cfg *SMTPConfig) error {
c, err := smtp.Dial(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port))
if err != nil {
return err
}
defer c.Close()
if err = c.Hello("gogs"); err != nil {
return err
}
if cfg.TLS {
if ok, _ := c.Extension("STARTTLS"); ok {
if err = c.StartTLS(&tls.Config{
InsecureSkipVerify: cfg.SkipVerify,
ServerName: cfg.Host,
}); err != nil {
return err
}
} else {
return errors.New("SMTP server unsupports TLS")
}
}
if ok, _ := c.Extension("AUTH"); ok {
if err = c.Auth(a); err != nil {
return err
}
return nil
}
return ErrUnsupportedLoginType
}
// Query if name/passwd can login against the LDAP directory pool
// Create a local user if success
// Return the same LoginUserPlain semantic
func LoginUserSMTPSource(u *User, name, passwd string, sourceId int64, cfg *SMTPConfig, autoRegister bool) (*User, error) {
// Verify allowed domains.
if len(cfg.AllowedDomains) > 0 {
idx := strings.Index(name, "@")
if idx == -1 {
return nil, ErrUserNotExist{0, name}
} else if !com.IsSliceContainsStr(strings.Split(cfg.AllowedDomains, ","), name[idx+1:]) {
return nil, ErrUserNotExist{0, name}
}
}
var auth smtp.Auth
if cfg.Auth == SMTP_PLAIN {
auth = smtp.PlainAuth("", name, passwd, cfg.Host)
} else if cfg.Auth == SMTP_LOGIN {
auth = LoginAuth(name, passwd)
} else {
return nil, errors.New("Unsupported SMTP auth type")
}
if err := SMTPAuth(auth, cfg); err != nil {
if strings.Contains(err.Error(), "Username and Password not accepted") {
return nil, ErrUserNotExist{0, name}
}
return nil, err
}
if !autoRegister {
return u, nil
}
var loginName = name
idx := strings.Index(name, "@")
if idx > -1 {
loginName = name[:idx]
}
// fake a local user creation
u = &User{
LowerName: strings.ToLower(loginName),
Name: strings.ToLower(loginName),
LoginType: SMTP,
LoginSource: sourceId,
LoginName: name,
IsActive: true,
Passwd: passwd,
Email: name,
}
err := CreateUser(u)
return u, err
}
// __________ _____ _____
// \______ \/ _ \ / \
// | ___/ /_\ \ / \ / \
// | | / | \/ Y \
// |____| \____|__ /\____|__ /
// \/ \/
// Query if name/passwd can login against PAM
// Create a local user if success
// Return the same LoginUserPlain semantic
func LoginUserPAMSource(u *User, name, passwd string, sourceId int64, cfg *PAMConfig, autoRegister bool) (*User, error) {
if err := pam.PAMAuth(cfg.ServiceName, name, passwd); err != nil {
if strings.Contains(err.Error(), "Authentication failure") {
return nil, ErrUserNotExist{0, name}
}
return nil, err
}
if !autoRegister {
return u, nil
}
// fake a local user creation
u = &User{
LowerName: strings.ToLower(name),
Name: name,
LoginType: PAM,
LoginSource: sourceId,
LoginName: name,
IsActive: true,
Passwd: passwd,
Email: name,
}
return u, CreateUser(u)
}
func ExternalUserLogin(u *User, name, passwd string, source *LoginSource, autoRegister bool) (*User, error) {
if !source.IsActived {
return nil, ErrLoginSourceNotActived
}
switch source.Type {
case LDAP, DLDAP:
return LoginUserLDAPSource(u, name, passwd, source, autoRegister)
case SMTP:
return LoginUserSMTPSource(u, name, passwd, source.ID, source.Cfg.(*SMTPConfig), autoRegister)
case PAM:
return LoginUserPAMSource(u, name, passwd, source.ID, source.Cfg.(*PAMConfig), autoRegister)
}
return nil, ErrUnsupportedLoginType
}
// UserSignIn validates user name and password.
func UserSignIn(uname, passwd string) (*User, error) {
var u *User
if strings.Contains(uname, "@") {
u = &User{Email: strings.ToLower(uname)}
} else {
u = &User{LowerName: strings.ToLower(uname)}
}
userExists, err := x.Get(u)
if err != nil {
return nil, err
}
if userExists {
switch u.LoginType {
case NOTYPE, PLAIN:
if u.ValidatePassword(passwd) {
return u, nil
}
return nil, ErrUserNotExist{u.Id, u.Name}
default:
var source LoginSource
hasSource, err := x.Id(u.LoginSource).Get(&source)
if err != nil {
return nil, err
} else if !hasSource {
return nil, ErrLoginSourceNotExist
}
return ExternalUserLogin(u, u.LoginName, passwd, &source, false)
}
}
var sources []LoginSource
if err = x.UseBool().Find(&sources, &LoginSource{IsActived: true}); err != nil {
return nil, err
}
for _, source := range sources {
u, err := ExternalUserLogin(nil, uname, passwd, &source, true)
if err == nil {
return u, nil
}
log.Warn("Failed to login '%s' via '%s': %v", uname, source.Name, err)
}
return nil, ErrUserNotExist{u.Id, u.Name}
}