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| <?php
/**
* Zend Framework
*
* @category Zend
* @package Zend_Auth
* @subpackage Zend_Auth_Adapter_Http
* @version $Id$
*/
/**
* @see Zend_Auth_Adapter_Http_Abstract
*/
require_once 'Abstract.php';
/**
* NTLM Authentication Protocol and Security Support Provider
*
* @see http://davenport.sourceforge.net/ntlm.html
* @see http://ubiqx.org/cifs/SMB.html
* @see http://technet.microsoft.com/de-de/magazine/2006.08.securitywatch(en-us).aspx
*
* @todo add NTLMv1 support, as we can't prohibit sending v1 blobs anyway
*
* IMPORTANT NOTE: quoting section 2.8.5.7 from
* http://ubiqx.org/cifs/SMB.html: "The use of NTLMv2 is
* not negotiated between the client and server. There is
* nothing in the protocol to determine which challenge/response
* algorithms should be used."
*/
class Portailaccueil_Library_Ntlm extends Zend_Auth_Adapter_Http_Abstract
{
/**
* Indicates that Unicode strings are supported for use in security buffer data.
*/
const FLAG_NEGOTIATE_UNICODE = 0x00000001;
/**
* Indicates that OEM strings are supported for use in security buffer data.
*/
const FLAG_NEGOTIATE_OEM = 0x00000002;
/**
* Requests that the server's authentication realm be included in the Type 2 message.
*/
const FLAG_REQUEST_TARGET = 0x00000004;
/**
* Specifies that authenticated communication between the client and server should
* carry a digital signature (message integrity).
*/
const FLAG_NEGOTIATE_SIGN = 0x00000010;
/**
* Specifies that authenticated communication between the client and server should
* be encrypted (message confidentiality).
*/
const FLAG_NEGOTIATE_SEAL = 0x00000020;
/**
* Indicates that datagram authentication is being used.
*/
const FLAG_NEGOTIATE_DATAGRAM_STYLE = 0x00000040;
/**
* Indicates that the Lan Manager Session Key should be used for signing and sealing
* authenticated communications.
*/
const FLAG_NEGOTIATE_LAN_MANAGER_KEY = 0x00000080;
/**
* Indicates that NTLM authentication is being used.
*/
const FLAG_NEGOTIATE_NTLM = 0x00000200;
/**
* Sent by the client in the Type 3 message to indicate that an anonymous context has
* been established. This also affects the response fields
*/
const FLAG_NEGOTIATE_ANONYMOUS = 0x00000800;
/**
* Sent by the client in the Type 1 message to indicate that the name of the domain in
* which the client workstation has membership is included in the message. This is used
* by the server to determine whether the client is eligible for local authentication.
*/
const FLAG_NEGOTIATE_DOMAIN_SUPPLIED = 0x00001000;
/**
* Sent by the client in the Type 1 message to indicate that the client workstation's
* name is included in the message. This is used by the server to determine whether the
* client is eligible for local authentication.
*/
const FLAG_NEGOTIATE_WORKSTATION_SUPPLIED = 0x00002000;
/**
* Sent by the server to indicate that the server and client are on the same machine.
* Implies that the client may use the established local credentials for authentication
* instead of calculating a response to the challenge.
*/
const FLAG_NEGOTIATE_LOCAL_CALL = 0x00004000;
/**
* Indicates that authenticated communication between the client and server should be
* signed with a "dummy" signature.
*/
const FLAG_NEGOTIATE_ALWAYS_SIGN = 0x00008000;
/**
* Sent by the server in the Type 2 message to indicate that the target authentication
* realm is a domain.
*/
const FLAG_TARGET_TYPE_DOMAIN = 0x00010000;
/**
* Sent by the server in the Type 2 message to indicate that the target authentication
* realm is a server.
*/
const FLAG_TARGET_TYPE_SERVER = 0x00020000;
/**
* Sent by the server in the Type 2 message to indicate that the target authentication
* realm is a share. Presumably, this is for share-level authentication. Usage is unclear.
*/
const FLAG_TARGET_TYPE_SHARE = 0x00040000;
/**
* Indicates that the NTLM2 signing and sealing scheme should be used for protecting
* authenticated communications. Note that this refers to a particular session security
* scheme, and is not related to the use of NTLMv2 authentication. This flag can,however,
* have an effect on the response calculations
*/
const FLAG_NEGOTIATE_NTLM2_KEY = 0x00080000;
/**
* Sent by the server in the Type 2 message to indicate that it is including a Target
* Information block in the message. The Target Information block is used in the
* calculation of the NTLMv2 response.
*/
const FLAG_NEGOTIATE_TARGET_INFO = 0x00800000;
/**
* Indicates that 128-bit encryption is supported.
*/
const FLAG_NEGOTIATE_128 = 0x20000000;
/**
* Indicates that the client will provide an encrypted master key in the "Session Key"
* field of the Type 3 message.
*/
const FLAG_NEGOTIATE_KEY_EXCHANGE = 0x40000000;
/**
* Indicates that 56-bit encryption is supported.
*/
const FLAG_NEGOTIATE_56 = 0x80000000;
/**
* names for buffers
*/
const BUFFER_DOMAIN = 'domain';
const BUFFER_WORKSTATION = 'workstation';
const BUFFER_TARGETNAME = 'targetname';
const BUFFER_TARGETINFO = 'targetinfo';
const BUFFER_LMRESPONSE = 'lmresponse';
const BUFFER_NTLMRESPONSE = 'ntlmresponse';
const BUFFER_USERNAME = 'username';
const BUFFER_SESSIONKEY = 'sessionkey';
/**
* auth targets server name
*/
const TARGETINFO_SERVER = 'servername';
/**
* auth targets domain name
*/
const TARGETINFO_DOMAIN = 'domain';
/**
* auth targets fully-qualified DNS host name (i.e., server.domain.com)
*/
const TARGETINFO_FQSERVER = 'fqserver';
/**
* auth DNS domain name (i.e., domain.com)
*/
const TARGETINFO_DNSDOMAIN = 'dnsdomain';
/**
* map where to find start of security buffers
*
* @var array $messageNumber => array $buffer => location in hex string
*/
protected $_securityBufferMap = array(
1 => array(
self::BUFFER_DOMAIN => 32,
self::BUFFER_WORKSTATION => 48
),
2 => array(
self::BUFFER_TARGETNAME => 24,
self::BUFFER_TARGETINFO => 80
),
3 => array(
self::BUFFER_LMRESPONSE => 24,
self::BUFFER_NTLMRESPONSE => 40,
self::BUFFER_TARGETNAME => 56,
self::BUFFER_USERNAME => 72,
self::BUFFER_WORKSTATION => 88,
self::BUFFER_SESSIONKEY => 104,
)
);
/**
* indicators in targetdata
*
* @var array
*/
protected $_targetInfoBufferTypMap = array(
self::TARGETINFO_DOMAIN => 2,
self::TARGETINFO_SERVER => 1,
self::TARGETINFO_DNSDOMAIN => 4,
self::TARGETINFO_FQSERVER => 3,
);
/**
* @var Zend_Log
*/
protected $_log;
/**
* @var Zend_Auth_Adapter_Http_Ntlm_Resolver_Interface
*/
protected $_resolver;
/**
* @var string current client message
*/
protected $_ntlmMessage;
/**
* @var int server flags
*/
protected $_serverFlags;
/**
* @var array infos about the client
*/
protected $_clientInfo;
/**
* @var array auth target info
*/
protected $_targetInfo = array();
/**
* the constructor
*
* @param array $config
* @return void
*/
public function __construct(array $config = array())
{
if (array_key_exists('log', $config) && $config['log'] instanceof Zend_Log) {
$this->_log = $config['log'];
} else {
$this->_log = new Zend_Log(new Zend_Log_Writer_Null());
}
if (array_key_exists('resolver', $config) /*&& $config['resolver'] instanceof Zend_Auth_Adapter_Http_Resolver_Interface*/) {
$this->setResolver($config['resolver']);
}
if (array_key_exists('session', $config) && $config['session'] instanceof Zend_Session_Namespace) {
$this->setSession($config['session']);
}
if (array_key_exists('challenge', $config)) {
$this->_challenge = $config['challenge'];
}
if (array_key_exists('targetInfo', $config)) {
$this->_targetInfo = $config['targetInfo'];
}
if (! array_key_exists('serverFlags', $config)) {
$config['serverFlags'] = dechex(
(0x00000000 | self::FLAG_NEGOTIATE_UNICODE | self::FLAG_NEGOTIATE_NTLM)
);
}
$this->setServerFlags($config['serverFlags']);
// to be removed
$this->_request = new Zend_Controller_Request_Http();
$this->_response = new Zend_Controller_Response_Http();
}
/**
* Authenticate
*
* @throws Zend_Auth_Adapter_Exception
* @return Zend_Auth_Result
*/
public function authenticate()
{
$authHeader = $this->getRequest()->getHeader('Authorization');
if (! $authHeader) {
return $this->_challengeClient();
}
if (substr($authHeader, 0, 5) !== 'NTLM ') {
/**
* @see Zend_Auth_Adapter_Exception
*/
require_once 'Zend/Auth/Adapter/Exception.php';
throw new Zend_Auth_Adapter_Exception('Unexpected authentication scheme');
}
$authMessage = base64_decode(substr($authHeader, 5));
if (substr($authMessage, 0, 7) != "NTLMSSP") {
/**
* @see Zend_Auth_Adapter_Exception
*/
require_once 'Zend/Auth/Adapter/Exception.php';
throw new Zend_Auth_Adapter_Exception('Unexpected client response');
}
$this->_ntlmMessage = bin2hex($authMessage);
$this->_log->INFO("client send ntlm message #{$this->_getMessageNumber()}");
$this->_log->DEBUG("ntlmMessage #{$this->_getMessageNumber()}: {$this->_ntlmMessage}");
if ($this->_getMessageNumber() === 3) {
return $this->_authenticateClient();
}
return $this->_challengeClient();
}
/**
* return message flags
*
* @return int
*/
public function getClientFlags()
{
$offset = $this->_getMessageNumber() == 1 ? 24 : 120;
$leFlags = substr($this->_ntlmMessage, $offset, 8);
$flags = $this->leHex2hex($leFlags);
return hexdec($flags);
}
/**
* returns client info
* @return array
*/
public function getClientInfo()
{
if (! empty($this->_clientInfo)) {
return $this->_clientInfo;
} else {
$clientFlags = $this->getClientFlags();
$this->_clientInfo = array();
}
// message 1 info
if ($this->_getMessageNumber() == 1) {
if ($clientFlags & self::FLAG_NEGOTIATE_DOMAIN_SUPPLIED) {
$this->_clientInfo[self::BUFFER_DOMAIN] = $this->_getBufferData(self::BUFFER_DOMAIN, FALSE);
}
if ($clientFlags & self::FLAG_NEGOTIATE_WORKSTATION_SUPPLIED) {
$this->_clientInfo[self::BUFFER_WORKSTATION] = $this->_getBufferData(self::BUFFER_WORKSTATION, FALSE);
}
}
// message 3 info
if ($this->_getMessageNumber() == 3) {
$this->_clientInfo = array(
self::BUFFER_USERNAME => $this->_getBufferData(self::BUFFER_USERNAME),
self::BUFFER_WORKSTATION => $this->_getBufferData(self::BUFFER_WORKSTATION),
self::BUFFER_TARGETNAME => $this->_getBufferData(self::BUFFER_TARGETNAME),
);
}
return $this->_clientInfo;
}
/**
* returns server flags (hex representation)
*
* $param $asLittleEndian
* @return string
*/
public function getServerFlags($asLittleEndian = TRUE)
{
return $asLittleEndian ?
bin2hex(pack('V', $this->_serverFlags)) :
dechex($this->_serverFlags);
}
/**
* sets server falgs from hex representation
*
* @param string $flags in hex representation
* @return int
*/
public function setServerFlags($flags)
{
$this->_serverFlags = hexdec($flags);
$this->_serverFlags |= self::FLAG_NEGOTIATE_TARGET_INFO;
if (! ($this->_serverFlags & (self::FLAG_TARGET_TYPE_SERVER | self::FLAG_TARGET_TYPE_SHARE))) {
$this->_serverFlags |= self::FLAG_TARGET_TYPE_DOMAIN;
}
return $this->_serverFlags;
}
public function setTargetInfo($target)
{
$this->_targetInfo = $target;
}
/**
* authenticates ntlm client (response to message 3)
*
* @return Zend_Auth_Result
*/
protected function _authenticateClient()
{
$resolver = $this->getResolver();
if (! $resolver) {
/**
* @see Zend_Auth_Adapter_Exception
*/
require_once 'Zend/Auth/Adapter/Exception.php';
throw new Zend_Auth_Adapter_Exception('A resolver object must be set before doing NTLM authentication');
}
$ntlmResponse = $this->_getBufferData(self::BUFFER_NTLMRESPONSE, FALSE);
$clientBlob = substr($ntlmResponse, 16);
$clientBlobHash = substr($ntlmResponse, 0, 16);
$userName = $this->_getBufferData(self::BUFFER_USERNAME);
$authTarget = $this->_getBufferData(self::BUFFER_TARGETNAME);
$md4hash = $resolver->resolve($userName);
if (!$md4hash) {
/**
* @see Zend_Auth_Adapter_Exception
*/
require_once 'Zend/Auth/Adapter/Exception.php';
throw new Zend_Auth_Adapter_Exception('Could not resolve shared secret');
}
$NTLMv2hash = hash_hmac('md5', $this->toUTF16LE(strtoupper($userName) . $authTarget), $md4hash, TRUE);
$blobHash = hash_hmac('md5', pack('H*', $this->_getChallenge()) . $clientBlob, $NTLMv2hash, TRUE);
// destroy challenge
if ($this->getSession() instanceof Zend_Session_Namespace) {
unset($this->getSession()->ntlmchallenge);
}
$identity = new Portailaccueil_Library_Identity(array(
'ntlmData' => $this->_clientInfo
));
if ($clientBlobHash == $blobHash) {
return new Zend_Auth_Result(Zend_Auth_Result::SUCCESS, $identity);
} else {
return $this->_challengeClient();
}
}
/**
* (non-PHPdoc)
* @see tine20/Zend/Auth/Http/Zend_Auth_Adapter_Http_Abstract#_challengeClient()
*/
protected function _challengeClient()
{
$result = parent::_challengeClient();
// include identity from message 1
return new Zend_Auth_Result(
$result->getCode(),
new Portailaccueil_Library_Identity(array(
'flags' => $this->getClientFlags(),
'ntlmData' => $this->getClientInfo()
)),
$result->getMessages()
);
}
protected function _getAuthHeader()
{
$header = 'NTLM';
if ($this->_getMessageNumber() === 1) {
$message2 = $this->_getChallengeMessage();
$header .= ' ' . trim(base64_encode(pack('H*', $message2)));
}
return $header;
}
/**
* generates challenge (message 2)
*
* @return string hex
*/
protected function _getChallengeMessage()
{
$clientFlags = $this->getClientFlags();
$useNTLM2SessionSecurity = $clientFlags & self::FLAG_NEGOTIATE_NTLM2_KEY;
$this->_log->INFO("client " . ($useNTLM2SessionSecurity ? 'supports' : " dosn't") . ' NTLM2 Session Security');
// force NTLM2 as this implies NTLMv2 or NTLM2 session response
//$this->_serverFlags |= self::FLAG_NEGOTIATE_NTLM2_KEY;
// todo: decide by serverFlags
$targetInfoBuffer = $this->_getTargetInfoBuffer($this->_targetInfo);
// todo: decide by serverFlags
$targetNameBuffer = bin2hex($this->toUTF16LE($this->_targetInfo[self::TARGETINFO_DOMAIN]));
// base offset to first buffer
$offset = 48;
$message2 =
'4e544c4d53535000'. // NTLMSSP Signature
'02000000'. // Type 2 Indicator
bin2hex(pack('vvV', // Target Name Security Buffer
strlen($targetNameBuffer)/2, // - Length
strlen($targetNameBuffer)/2, // - Allocated Space
$offset // - Offset
)).
$this->getServerFlags(). // Flags
$this->_getChallenge(). // Challenge
'0000000000000000'. // Context
bin2hex(pack('vvV', // Target Information Security Buffer
strlen($targetInfoBuffer)/2, // - Length
strlen($targetInfoBuffer)/2, // - Allocated Space
$offset += strlen($targetNameBuffer)/2 // - Offset
)).
$targetNameBuffer.
$targetInfoBuffer;
$this->_log->INFO('server generated ntlm message #2');
$this->_log->DEBUG("ntlmMessage #2: $message2");
return $message2;
}
/**
* generates random challenge
*
* @return string
*/
protected function _getChallenge()
{
if (! empty($this->_challenge)) {
return $this->_challenge;
}
$session = $this->getSession();
if (! $session instanceof Zend_Session_Namespace) {
/**
* @see Zend_Auth_Adapter_Exception
*/
require_once 'Zend/Auth/Adapter/Exception.php';
throw new Zend_Auth_Adapter_Exception('session is not set');
}
if (empty($session->ntlmchallenge)) {
$session->ntlmchallenge = $this->generateChallenge();
}
$this->_log->DEBUG("server challenge : {$session->ntlmchallenge}");
return $session->ntlmchallenge;
}
/**
* returns decoded buffer data
*
* @param string $name
* @param bool $isUTF16LE
* @return string
*/
protected function _getBufferData($name, $isUTF16LE = TRUE)
{
$sboffset = $this->_securityBufferMap[$this->_getMessageNumber()][$name];
$sbhex = substr($this->_ntlmMessage, $sboffset, 16);
extract(unpack('vlength/vspace/Voffset', pack('H*', $sbhex)));
$hexData = substr($this->_ntlmMessage, $offset*2, $length*2);
$data = pack('H*', $hexData);
if ($isUTF16LE) {
$data = iconv('UTF-16LE', 'UTF-8', $data);
}
return $data;
}
/**
* returns hex representation of given target info
*
* @param array $targetInfo
* @return string
*/
protected function _getTargetInfoBuffer(array $targetInfo)
{
$buffer = '';
foreach ($this->_targetInfoBufferTypMap as $type => $typeIdentifier) {
$data = array_key_exists($type, $targetInfo) ? $targetInfo[$type] : '';
$buffer .= $this->_getTargetInfoSubBuffer($type, $data);
}
// terminate string (hex)
$buffer .= '00000000';
return $buffer;
}
/**
* return hex representation of given target info subblock
*
* @param string $type
* @param string $data utf8 encoded data
* @return string
*/
protected function _getTargetInfoSubBuffer($type, $data)
{
$utf16le = $this->toUTF16LE($data);
return bin2hex(pack('vv', $this->_targetInfoBufferTypMap[$type], strlen($utf16le)).$utf16le);
}
/**
* gets number of current message
*
* @return int
*/
protected function _getMessageNumber()
{
return (int) $this->_ntlmMessage[17];
}
/**
* converts little-endian hex string to normal hex string
*
* @param string $leHex
* @return string
*/
public static function leHex2hex($leHex)
{
$l = $leHex;
return $l[6].$l[7].$l[4].$l[5].$l[2].$l[3].$l[0].$l[1];
}
/**
* converts utf8 string to utf16+little-endian
*
* @param string $utf8
* @return string
*/
public static function toUTF16LE($utf8) {
return iconv('UTF-8', 'UTF-16LE', $utf8);
}
/**
* returns random challenge in hex representation
*
* @return string
*/
public static function generateChallenge($length = 8)
{
$hexVals = '0123456789abcdef';
$challenge = "";
for ($i = 0; $i < $length*2; $i++) {
$challenge .= $hexVals[rand(0, 15)];
}
return $challenge;
}
} |
Ntlm et zend framework
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