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login.go
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login.go
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// Copyright github.com/juju2013. 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/go-xorm/core"
"github.com/go-xorm/xorm"
"github.com/gogits/gogs/modules/auth/ldap"
"github.com/gogits/gogs/modules/log"
)
// Login types.
const (
LT_NOTYPE = iota
LT_PLAIN
LT_LDAP
LT_SMTP
)
var (
ErrAuthenticationAlreadyExist = errors.New("Authentication already exist")
ErrAuthenticationNotExist = errors.New("Authentication does not exist")
ErrAuthenticationUserUsed = errors.New("Authentication has been used by some users")
)
var LoginTypes = map[int]string{
LT_LDAP: "LDAP",
LT_SMTP: "SMTP",
}
// Ensure structs implmented interface.
var (
_ core.Conversion = &LDAPConfig{}
_ core.Conversion = &SMTPConfig{}
)
type LDAPConfig struct {
ldap.Ldapsource
}
// implement
func (cfg *LDAPConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, &cfg.Ldapsource)
}
func (cfg *LDAPConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg.Ldapsource)
}
type SMTPConfig struct {
Auth string
Host string
Port int
TLS bool
}
// implement
func (cfg *SMTPConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, cfg)
}
func (cfg *SMTPConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
type LoginSource struct {
Id int64
Type int
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"`
AllowAutoRegister bool `xorm:"not null default false"`
}
func (source *LoginSource) TypeString() string {
return LoginTypes[source.Type]
}
func (source *LoginSource) LDAP() *LDAPConfig {
return source.Cfg.(*LDAPConfig)
}
func (source *LoginSource) SMTP() *SMTPConfig {
return source.Cfg.(*SMTPConfig)
}
// for xorm callback
func (source *LoginSource) BeforeSet(colName string, val xorm.Cell) {
if colName == "type" {
ty := (*val).(int64)
switch ty {
case LT_LDAP:
source.Cfg = new(LDAPConfig)
case LT_SMTP:
source.Cfg = new(SMTPConfig)
}
}
}
func GetAuths() ([]*LoginSource, error) {
var auths = make([]*LoginSource, 0)
err := orm.Find(&auths)
return auths, err
}
func GetLoginSourceById(id int64) (*LoginSource, error) {
source := new(LoginSource)
has, err := orm.Id(id).Get(source)
if err != nil {
return nil, err
}
if !has {
return nil, ErrAuthenticationNotExist
}
return source, nil
}
func AddSource(source *LoginSource) error {
_, err := orm.Insert(source)
return err
}
func UpdateSource(source *LoginSource) error {
_, err := orm.Id(source.Id).AllCols().Update(source)
return err
}
func DelLoginSource(source *LoginSource) error {
cnt, err := orm.Count(&User{LoginSource: source.Id})
if err != nil {
return err
}
if cnt > 0 {
return ErrAuthenticationUserUsed
}
_, err = orm.Id(source.Id).Delete(&LoginSource{})
return err
}
// login a user
func LoginUser(uname, passwd string) (*User, error) {
var u *User
if strings.Contains(uname, "@") {
u = &User{Email: uname}
} else {
u = &User{LowerName: strings.ToLower(uname)}
}
has, err := orm.Get(u)
if err != nil {
return nil, err
}
if u.LoginType == LT_NOTYPE {
if has {
u.LoginType = LT_PLAIN
}
}
// for plain login, user must have existed.
if u.LoginType == LT_PLAIN {
if !has {
return nil, ErrUserNotExist
}
newUser := &User{Passwd: passwd, Salt: u.Salt}
newUser.EncodePasswd()
if u.Passwd != newUser.Passwd {
return nil, ErrUserNotExist
}
return u, nil
} else {
if !has {
var sources []LoginSource
if err = orm.UseBool().Find(&sources,
&LoginSource{IsActived: true, AllowAutoRegister: true}); err != nil {
return nil, err
}
for _, source := range sources {
if source.Type == LT_LDAP {
u, err := LoginUserLdapSource(nil, uname, passwd,
source.Id, source.Cfg.(*LDAPConfig), true)
if err == nil {
return u, nil
} else {
log.Warn("Fail to login(%s) by LDAP(%s): %v", uname, source.Name, err)
}
} else if source.Type == LT_SMTP {
u, err := LoginUserSMTPSource(nil, uname, passwd,
source.Id, source.Cfg.(*SMTPConfig), true)
if err == nil {
return u, nil
} else {
log.Warn("Fail to login(%s) by SMTP(%s): %v", uname, source.Name, err)
}
}
}
return nil, ErrUserNotExist
}
var source LoginSource
hasSource, err := orm.Id(u.LoginSource).Get(&source)
if err != nil {
return nil, err
} else if !hasSource {
return nil, ErrLoginSourceNotExist
} else if !source.IsActived {
return nil, ErrLoginSourceNotActived
}
switch u.LoginType {
case LT_LDAP:
return LoginUserLdapSource(u, u.LoginName, passwd,
source.Id, source.Cfg.(*LDAPConfig), false)
case LT_SMTP:
return LoginUserSMTPSource(u, u.LoginName, passwd,
source.Id, source.Cfg.(*SMTPConfig), false)
}
return nil, ErrUnsupportedLoginType
}
}
// Query if name/passwd can login against the LDAP direcotry pool
// Create a local user if success
// Return the same LoginUserPlain semantic
func LoginUserLdapSource(user *User, name, passwd string, sourceId int64, cfg *LDAPConfig, autoRegister bool) (*User, error) {
mail, logged := cfg.Ldapsource.SearchEntry(name, passwd)
if !logged {
// user not in LDAP, do nothing
return nil, ErrUserNotExist
}
if !autoRegister {
return user, nil
}
// fake a local user creation
user = &User{
LowerName: strings.ToLower(name),
Name: strings.ToLower(name),
LoginType: LT_LDAP,
LoginSource: sourceId,
LoginName: name,
IsActive: true,
Passwd: passwd,
Email: mail,
}
return RegisterUser(user)
}
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
}
var (
SMTP_PLAIN = "PLAIN"
SMTP_LOGIN = "LOGIN"
SMTPAuths = []string{SMTP_PLAIN, SMTP_LOGIN}
)
func SmtpAuth(host string, port int, a smtp.Auth, useTls bool) error {
c, err := smtp.Dial(fmt.Sprintf("%s:%d", host, port))
if err != nil {
return err
}
defer c.Close()
if err = c.Hello("gogs"); err != nil {
return err
}
if useTls {
if ok, _ := c.Extension("STARTTLS"); ok {
config := &tls.Config{ServerName: host}
if err = c.StartTLS(config); 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
} else {
return ErrUnsupportedLoginType
}
}
// Query if name/passwd can login against the LDAP direcotry pool
// Create a local user if success
// Return the same LoginUserPlain semantic
func LoginUserSMTPSource(user *User, name, passwd string, sourceId int64, cfg *SMTPConfig, autoRegister bool) (*User, error) {
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(cfg.Host, cfg.Port, auth, cfg.TLS); err != nil {
if strings.Contains(err.Error(), "Username and Password not accepted") {
return nil, ErrUserNotExist
}
return nil, err
}
if !autoRegister {
return user, nil
}
var loginName = name
idx := strings.Index(name, "@")
if idx > -1 {
loginName = name[:idx]
}
// fake a local user creation
user = &User{
LowerName: strings.ToLower(loginName),
Name: strings.ToLower(loginName),
LoginType: LT_SMTP,
LoginSource: sourceId,
LoginName: name,
IsActive: true,
Passwd: passwd,
Email: name,
}
return RegisterUser(user)
}