forgejo-federation/models/login_source.go

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// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
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package models
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import (
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"crypto/tls"
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"encoding/json"
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"errors"
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"fmt"
"net/smtp"
"net/textproto"
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"strings"
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"time"
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"github.com/Unknwon/com"
"github.com/go-macaron/binding"
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"github.com/go-xorm/core"
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"github.com/go-xorm/xorm"
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"code.gitea.io/gitea/modules/auth/ldap"
"code.gitea.io/gitea/modules/auth/pam"
"code.gitea.io/gitea/modules/log"
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)
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// LoginType represents an login type.
type LoginType int
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// Note: new type must append to the end of list to maintain compatibility.
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const (
LoginNoType LoginType = iota
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LoginPlain // 1
LoginLDAP // 2
LoginSMTP // 3
LoginPAM // 4
LoginDLDAP // 5
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)
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// LoginNames contains the name of LoginType values.
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var LoginNames = map[LoginType]string{
LoginLDAP: "LDAP (via BindDN)",
LoginDLDAP: "LDAP (simple auth)", // Via direct bind
LoginSMTP: "SMTP",
LoginPAM: "PAM",
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}
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// SecurityProtocolNames contains the name of SecurityProtocol values.
var SecurityProtocolNames = map[ldap.SecurityProtocol]string{
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ldap.SecurityProtocolUnencrypted: "Unencrypted",
ldap.SecurityProtocolLDAPS: "LDAPS",
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ldap.SecurityProtocolStartTLS: "StartTLS",
}
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// Ensure structs implemented interface.
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var (
_ core.Conversion = &LDAPConfig{}
_ core.Conversion = &SMTPConfig{}
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_ core.Conversion = &PAMConfig{}
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)
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// LDAPConfig holds configuration for LDAP login source.
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type LDAPConfig struct {
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*ldap.Source
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}
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// FromDB fills up a LDAPConfig from serialized format.
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func (cfg *LDAPConfig) FromDB(bs []byte) error {
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return json.Unmarshal(bs, &cfg)
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}
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// ToDB exports a LDAPConfig to a serialized format.
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func (cfg *LDAPConfig) ToDB() ([]byte, error) {
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return json.Marshal(cfg)
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}
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// SecurityProtocolName returns the name of configured security
// protocol.
func (cfg *LDAPConfig) SecurityProtocolName() string {
return SecurityProtocolNames[cfg.SecurityProtocol]
}
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// SMTPConfig holds configuration for the SMTP login source.
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type SMTPConfig struct {
Auth string
Host string
Port int
AllowedDomains string `xorm:"TEXT"`
TLS bool
SkipVerify bool
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}
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// FromDB fills up an SMTPConfig from serialized format.
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func (cfg *SMTPConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, cfg)
}
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// ToDB exports an SMTPConfig to a serialized format.
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func (cfg *SMTPConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
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// PAMConfig holds configuration for the PAM login source.
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type PAMConfig struct {
ServiceName string // pam service (e.g. system-auth)
}
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// FromDB fills up a PAMConfig from serialized format.
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func (cfg *PAMConfig) FromDB(bs []byte) error {
return json.Unmarshal(bs, &cfg)
}
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// ToDB exports a PAMConfig to a serialized format.
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func (cfg *PAMConfig) ToDB() ([]byte, error) {
return json.Marshal(cfg)
}
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// LoginSource represents an external way for authorizing users.
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type LoginSource struct {
ID int64 `xorm:"pk autoincr"`
Type LoginType
Name string `xorm:"UNIQUE"`
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IsActived bool `xorm:"INDEX NOT NULL DEFAULT false"`
Cfg core.Conversion `xorm:"TEXT"`
Created time.Time `xorm:"-"`
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CreatedUnix int64 `xorm:"INDEX"`
Updated time.Time `xorm:"-"`
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UpdatedUnix int64 `xorm:"INDEX"`
}
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// BeforeInsert is invoked from XORM before inserting an object of this type.
func (source *LoginSource) BeforeInsert() {
source.CreatedUnix = time.Now().Unix()
source.UpdatedUnix = source.CreatedUnix
}
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// BeforeUpdate is invoked from XORM before updating this object.
func (source *LoginSource) BeforeUpdate() {
source.UpdatedUnix = time.Now().Unix()
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}
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// Cell2Int64 converts a xorm.Cell type to int64,
// and handles possible irregular cases.
func Cell2Int64(val xorm.Cell) int64 {
switch (*val).(type) {
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case []uint8:
log.Trace("Cell2Int64 ([]uint8): %v", *val)
return com.StrTo(string((*val).([]uint8))).MustInt64()
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}
return (*val).(int64)
}
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// BeforeSet is invoked from XORM before setting the value of a field of this object.
func (source *LoginSource) BeforeSet(colName string, val xorm.Cell) {
switch colName {
case "type":
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switch LoginType(Cell2Int64(val)) {
case LoginLDAP, LoginDLDAP:
source.Cfg = new(LDAPConfig)
case LoginSMTP:
source.Cfg = new(SMTPConfig)
case LoginPAM:
source.Cfg = new(PAMConfig)
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default:
panic("unrecognized login source type: " + com.ToStr(*val))
}
}
}
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// AfterSet is invoked from XORM after setting the value of a field of this object.
func (source *LoginSource) AfterSet(colName string, _ xorm.Cell) {
switch colName {
case "created_unix":
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source.Created = time.Unix(source.CreatedUnix, 0).Local()
case "updated_unix":
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source.Updated = time.Unix(source.UpdatedUnix, 0).Local()
}
}
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// TypeName return name of this login source type.
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func (source *LoginSource) TypeName() string {
return LoginNames[source.Type]
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}
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// IsLDAP returns true of this source is of the LDAP type.
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func (source *LoginSource) IsLDAP() bool {
return source.Type == LoginLDAP
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}
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// IsDLDAP returns true of this source is of the DLDAP type.
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func (source *LoginSource) IsDLDAP() bool {
return source.Type == LoginDLDAP
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}
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// IsSMTP returns true of this source is of the SMTP type.
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func (source *LoginSource) IsSMTP() bool {
return source.Type == LoginSMTP
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}
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// IsPAM returns true of this source is of the PAM type.
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func (source *LoginSource) IsPAM() bool {
return source.Type == LoginPAM
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}
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// HasTLS returns true of this source supports TLS.
func (source *LoginSource) HasTLS() bool {
return ((source.IsLDAP() || source.IsDLDAP()) &&
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source.LDAP().SecurityProtocol > ldap.SecurityProtocolUnencrypted) ||
source.IsSMTP()
}
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// UseTLS returns true of this source is configured to use TLS.
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func (source *LoginSource) UseTLS() bool {
switch source.Type {
case LoginLDAP, LoginDLDAP:
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return source.LDAP().SecurityProtocol != ldap.SecurityProtocolUnencrypted
case LoginSMTP:
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return source.SMTP().TLS
}
return false
}
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// SkipVerify returns true if this source is configured to skip SSL
// verification.
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func (source *LoginSource) SkipVerify() bool {
switch source.Type {
case LoginLDAP, LoginDLDAP:
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return source.LDAP().SkipVerify
case LoginSMTP:
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return source.SMTP().SkipVerify
}
return false
}
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// LDAP returns LDAPConfig for this source, if of LDAP type.
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func (source *LoginSource) LDAP() *LDAPConfig {
return source.Cfg.(*LDAPConfig)
}
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// SMTP returns SMTPConfig for this source, if of SMTP type.
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func (source *LoginSource) SMTP() *SMTPConfig {
return source.Cfg.(*SMTPConfig)
}
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// PAM returns PAMConfig for this source, if of PAM type.
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func (source *LoginSource) PAM() *PAMConfig {
return source.Cfg.(*PAMConfig)
}
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// CreateLoginSource inserts a LoginSource in the DB if not already
// existing with the given name.
func CreateLoginSource(source *LoginSource) error {
has, err := x.Get(&LoginSource{Name: source.Name})
if err != nil {
return err
} else if has {
return ErrLoginSourceAlreadyExist{source.Name}
}
_, err = x.Insert(source)
return err
}
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// LoginSources returns a slice of all login sources found in DB.
func LoginSources() ([]*LoginSource, error) {
auths := make([]*LoginSource, 0, 5)
return auths, x.Find(&auths)
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}
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// GetLoginSourceByID returns login source by given ID.
func GetLoginSourceByID(id int64) (*LoginSource, error) {
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source := new(LoginSource)
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has, err := x.Id(id).Get(source)
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if err != nil {
return nil, err
} else if !has {
return nil, ErrLoginSourceNotExist{id}
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}
return source, nil
}
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// UpdateSource updates a LoginSource record in DB.
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func UpdateSource(source *LoginSource) error {
_, err := x.Id(source.ID).AllCols().Update(source)
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return err
}
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// DeleteSource deletes a LoginSource record in DB.
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func DeleteSource(source *LoginSource) error {
count, err := x.Count(&User{LoginSource: source.ID})
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if err != nil {
return err
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} else if count > 0 {
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return ErrLoginSourceInUse{source.ID}
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}
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_, err = x.Id(source.ID).Delete(new(LoginSource))
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return err
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}
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// CountLoginSources returns number of login sources.
func CountLoginSources() int64 {
count, _ := x.Count(new(LoginSource))
return count
}
// .____ ________ _____ __________
// | | \______ \ / _ \\______ \
// | | | | \ / /_\ \| ___/
// | |___ | ` \/ | \ |
// |_______ \/_______ /\____|__ /____|
// \/ \/ \/
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func composeFullName(firstname, surname, username string) string {
switch {
case len(firstname) == 0 && len(surname) == 0:
return username
case len(firstname) == 0:
return surname
case len(surname) == 0:
return firstname
default:
return firstname + " " + surname
}
}
// LoginViaLDAP queries if login/password is valid against the LDAP directory pool,
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// and create a local user if success when enabled.
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func LoginViaLDAP(user *User, login, password string, source *LoginSource, autoRegister bool) (*User, error) {
username, fn, sn, mail, isAdmin, succeed := source.Cfg.(*LDAPConfig).SearchEntry(login, password, source.Type == LoginDLDAP)
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if !succeed {
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// User not in LDAP, do nothing
return nil, ErrUserNotExist{0, login, 0}
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}
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if !autoRegister {
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return user, nil
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}
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// Fallback.
if len(username) == 0 {
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username = login
}
// Validate username make sure it satisfies requirement.
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if binding.AlphaDashDotPattern.MatchString(username) {
return nil, fmt.Errorf("Invalid pattern for attribute 'username' [%s]: must be valid alpha or numeric or dash(-_) or dot characters", username)
}
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if len(mail) == 0 {
mail = fmt.Sprintf("%s@localhost", username)
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}
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user = &User{
LowerName: strings.ToLower(username),
Name: username,
FullName: composeFullName(fn, sn, username),
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Email: mail,
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LoginType: source.Type,
LoginSource: source.ID,
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LoginName: login,
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IsActive: true,
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IsAdmin: isAdmin,
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}
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return user, CreateUser(user)
}
// _________ __________________________
// / _____/ / \__ ___/\______ \
// \_____ \ / \ / \| | | ___/
// / \/ Y \ | | |
// /_______ /\____|__ /____| |____|
// \/ \/
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type smtpLoginAuth struct {
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username, password string
}
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func (auth *smtpLoginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {
return "LOGIN", []byte(auth.username), nil
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}
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func (auth *smtpLoginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
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if more {
switch string(fromServer) {
case "Username:":
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return []byte(auth.username), nil
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case "Password:":
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return []byte(auth.password), nil
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}
}
return nil, nil
}
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// SMTP authentication type names.
const (
SMTPPlain = "PLAIN"
SMTPLogin = "LOGIN"
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)
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// SMTPAuths contains available SMTP authentication type names.
var SMTPAuths = []string{SMTPPlain, SMTPLogin}
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// SMTPAuth performs an SMTP authentication.
func SMTPAuth(a smtp.Auth, cfg *SMTPConfig) error {
c, err := smtp.Dial(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port))
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if err != nil {
return err
}
defer c.Close()
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if err = c.Hello("gogs"); err != nil {
return err
}
if cfg.TLS {
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if ok, _ := c.Extension("STARTTLS"); ok {
if err = c.StartTLS(&tls.Config{
InsecureSkipVerify: cfg.SkipVerify,
ServerName: cfg.Host,
}); err != nil {
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return err
}
} else {
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return errors.New("SMTP server unsupports TLS")
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}
}
if ok, _ := c.Extension("AUTH"); ok {
if err = c.Auth(a); err != nil {
return err
}
return nil
}
return ErrUnsupportedLoginType
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}
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// LoginViaSMTP queries if login/password is valid against the SMTP,
// and create a local user if success when enabled.
func LoginViaSMTP(user *User, login, password string, sourceID int64, cfg *SMTPConfig, autoRegister bool) (*User, error) {
// Verify allowed domains.
if len(cfg.AllowedDomains) > 0 {
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idx := strings.Index(login, "@")
if idx == -1 {
return nil, ErrUserNotExist{0, login, 0}
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} else if !com.IsSliceContainsStr(strings.Split(cfg.AllowedDomains, ","), login[idx+1:]) {
return nil, ErrUserNotExist{0, login, 0}
}
}
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var auth smtp.Auth
if cfg.Auth == SMTPPlain {
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auth = smtp.PlainAuth("", login, password, cfg.Host)
} else if cfg.Auth == SMTPLogin {
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auth = &smtpLoginAuth{login, password}
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} else {
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return nil, errors.New("Unsupported SMTP auth type")
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}
if err := SMTPAuth(auth, cfg); err != nil {
// Check standard error format first,
// then fallback to worse case.
tperr, ok := err.(*textproto.Error)
if (ok && tperr.Code == 535) ||
strings.Contains(err.Error(), "Username and Password not accepted") {
return nil, ErrUserNotExist{0, login, 0}
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}
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return nil, err
}
if !autoRegister {
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return user, nil
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}
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username := login
idx := strings.Index(login, "@")
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if idx > -1 {
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username = login[:idx]
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}
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user = &User{
LowerName: strings.ToLower(username),
Name: strings.ToLower(username),
Email: login,
Passwd: password,
LoginType: LoginSMTP,
LoginSource: sourceID,
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LoginName: login,
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IsActive: true,
}
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return user, CreateUser(user)
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}
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// __________ _____ _____
// \______ \/ _ \ / \
// | ___/ /_\ \ / \ / \
// | | / | \/ Y \
// |____| \____|__ /\____|__ /
// \/ \/
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// LoginViaPAM queries if login/password is valid against the PAM,
// and create a local user if success when enabled.
func LoginViaPAM(user *User, login, password string, sourceID int64, cfg *PAMConfig, autoRegister bool) (*User, error) {
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if err := pam.Auth(cfg.ServiceName, login, password); err != nil {
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if strings.Contains(err.Error(), "Authentication failure") {
return nil, ErrUserNotExist{0, login, 0}
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}
return nil, err
}
if !autoRegister {
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return user, nil
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}
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user = &User{
LowerName: strings.ToLower(login),
Name: login,
Email: login,
Passwd: password,
LoginType: LoginPAM,
LoginSource: sourceID,
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LoginName: login,
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IsActive: true,
}
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return user, CreateUser(user)
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}
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// ExternalUserLogin attempts a login using external source types.
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func ExternalUserLogin(user *User, login, password string, source *LoginSource, autoRegister bool) (*User, error) {
if !source.IsActived {
return nil, ErrLoginSourceNotActived
}
switch source.Type {
case LoginLDAP, LoginDLDAP:
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return LoginViaLDAP(user, login, password, source, autoRegister)
case LoginSMTP:
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return LoginViaSMTP(user, login, password, source.ID, source.Cfg.(*SMTPConfig), autoRegister)
case LoginPAM:
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return LoginViaPAM(user, login, password, source.ID, source.Cfg.(*PAMConfig), autoRegister)
}
return nil, ErrUnsupportedLoginType
}
// UserSignIn validates user name and password.
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func UserSignIn(username, password string) (*User, error) {
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var user *User
if strings.Contains(username, "@") {
user = &User{Email: strings.ToLower(strings.TrimSpace(username))}
} else {
user = &User{LowerName: strings.ToLower(strings.TrimSpace(username))}
}
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hasUser, err := x.Get(user)
if err != nil {
return nil, err
}
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if hasUser {
switch user.LoginType {
case LoginNoType, LoginPlain:
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if user.ValidatePassword(password) {
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return user, nil
}
return nil, ErrUserNotExist{user.ID, user.Name, 0}
default:
var source LoginSource
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hasSource, err := x.Id(user.LoginSource).Get(&source)
if err != nil {
return nil, err
} else if !hasSource {
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return nil, ErrLoginSourceNotExist{user.LoginSource}
}
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return ExternalUserLogin(user, user.LoginName, password, &source, false)
}
}
sources := make([]*LoginSource, 0, 3)
if err = x.UseBool().Find(&sources, &LoginSource{IsActived: true}); err != nil {
return nil, err
}
for _, source := range sources {
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authUser, err := ExternalUserLogin(nil, username, password, source, true)
if err == nil {
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return authUser, nil
}
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log.Warn("Failed to login '%s' via '%s': %v", username, source.Name, err)
}
return nil, ErrUserNotExist{user.ID, user.Name, 0}
}