SASL/External.php 0000644 00000006054 15151225160 0007604 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2008 Christoph Schulz |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Christoph Schulz <develop@kristov.de> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implmentation of EXTERNAL SASL mechanism
*
* @author Christoph Schulz <develop@kristov.de>
* @access public
* @version 1.0.3
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_External extends Auth_SASL_Common
{
/**
* Returns EXTERNAL response
*
* @param string $authcid Authentication id (username)
* @param string $pass Password
* @param string $authzid Autorization id
* @return string EXTERNAL Response
*/
function getResponse($authcid, $pass, $authzid = '')
{
return $authzid;
}
}
?>
SASL/DigestMD5.php 0000644 00000020547 15151225160 0007552 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implmentation of DIGEST-MD5 SASL mechanism
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_DigestMD5 extends Auth_SASL_Common
{
/**
* Provides the (main) client response for DIGEST-MD5
* requires a few extra parameters than the other
* mechanisms, which are unavoidable.
*
* @param string $authcid Authentication id (username)
* @param string $pass Password
* @param string $challenge The digest challenge sent by the server
* @param string $hostname The hostname of the machine you're connecting to
* @param string $service The servicename (eg. imap, pop, acap etc)
* @param string $authzid Authorization id (username to proxy as)
* @return string The digest response (NOT base64 encoded)
* @access public
*/
function getResponse($authcid, $pass, $challenge, $hostname, $service, $authzid = '')
{
$challenge = $this->_parseChallenge($challenge);
$authzid_string = '';
if ($authzid != '') {
$authzid_string = ',authzid="' . $authzid . '"';
}
if (!empty($challenge)) {
$cnonce = $this->_getCnonce();
$digest_uri = sprintf('%s/%s', $service, $hostname);
$response_value = $this->_getResponseValue($authcid, $pass, $challenge['realm'], $challenge['nonce'], $cnonce, $digest_uri, $authzid);
if ($challenge['realm']) {
return sprintf('username="%s",realm="%s"' . $authzid_string .
',nonce="%s",cnonce="%s",nc=00000001,qop=auth,digest-uri="%s",response=%s,maxbuf=%d', $authcid, $challenge['realm'], $challenge['nonce'], $cnonce, $digest_uri, $response_value, $challenge['maxbuf']);
} else {
return sprintf('username="%s"' . $authzid_string . ',nonce="%s",cnonce="%s",nc=00000001,qop=auth,digest-uri="%s",response=%s,maxbuf=%d', $authcid, $challenge['nonce'], $cnonce, $digest_uri, $response_value, $challenge['maxbuf']);
}
} else {
return PEAR::raiseError('Invalid digest challenge');
}
}
/**
* Parses and verifies the digest challenge*
*
* @param string $challenge The digest challenge
* @return array The parsed challenge as an assoc
* array in the form "directive => value".
* @access private
*/
function _parseChallenge($challenge)
{
$tokens = array();
while (preg_match('/^([a-z-]+)=("[^"]+(?<!\\\)"|[^,]+)/i', $challenge, $matches)) {
// Ignore these as per rfc2831
if ($matches[1] == 'opaque' OR $matches[1] == 'domain') {
$challenge = substr($challenge, strlen($matches[0]) + 1);
continue;
}
// Allowed multiple "realm" and "auth-param"
if (!empty($tokens[$matches[1]]) AND ($matches[1] == 'realm' OR $matches[1] == 'auth-param')) {
if (is_array($tokens[$matches[1]])) {
$tokens[$matches[1]][] = preg_replace('/^"(.*)"$/', '\\1', $matches[2]);
} else {
$tokens[$matches[1]] = array($tokens[$matches[1]], preg_replace('/^"(.*)"$/', '\\1', $matches[2]));
}
// Any other multiple instance = failure
} elseif (!empty($tokens[$matches[1]])) {
$tokens = array();
break;
} else {
$tokens[$matches[1]] = preg_replace('/^"(.*)"$/', '\\1', $matches[2]);
}
// Remove the just parsed directive from the challenge
$challenge = substr($challenge, strlen($matches[0]) + 1);
}
/**
* Defaults and required directives
*/
// Realm
if (empty($tokens['realm'])) {
$tokens['realm'] = "";
}
// Maxbuf
if (empty($tokens['maxbuf'])) {
$tokens['maxbuf'] = 65536;
}
// Required: nonce, algorithm
if (empty($tokens['nonce']) OR empty($tokens['algorithm'])) {
return array();
}
return $tokens;
}
/**
* Creates the response= part of the digest response
*
* @param string $authcid Authentication id (username)
* @param string $pass Password
* @param string $realm Realm as provided by the server
* @param string $nonce Nonce as provided by the server
* @param string $cnonce Client nonce
* @param string $digest_uri The digest-uri= value part of the response
* @param string $authzid Authorization id
* @return string The response= part of the digest response
* @access private
*/
function _getResponseValue($authcid, $pass, $realm, $nonce, $cnonce, $digest_uri, $authzid = '')
{
if ($authzid == '') {
$A1 = sprintf('%s:%s:%s', pack('H32', md5(sprintf('%s:%s:%s', $authcid, $realm, $pass))), $nonce, $cnonce);
} else {
$A1 = sprintf('%s:%s:%s:%s', pack('H32', md5(sprintf('%s:%s:%s', $authcid, $realm, $pass))), $nonce, $cnonce, $authzid);
}
$A2 = 'AUTHENTICATE:' . $digest_uri;
return md5(sprintf('%s:%s:00000001:%s:auth:%s', md5($A1), $nonce, $cnonce, md5($A2)));
}
/**
* Creates the client nonce for the response
*
* @return string The cnonce value
* @access private
*/
function _getCnonce()
{
if (@file_exists('/dev/urandom') && $fd = @fopen('/dev/urandom', 'r')) {
return base64_encode(fread($fd, 32));
} elseif (@file_exists('/dev/random') && $fd = @fopen('/dev/random', 'r')) {
return base64_encode(fread($fd, 32));
} else {
$str = '';
for ($i=0; $i<32; $i++) {
$str .= chr(mt_rand(0, 255));
}
return base64_encode($str);
}
}
}
?>
SASL/Common.php 0000644 00000010426 15151225160 0007250 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Common functionality to SASL mechanisms
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
class Auth_SASL_Common
{
/**
* Function which implements HMAC MD5 digest
*
* @param string $key The secret key
* @param string $data The data to hash
* @param bool $raw_output Whether the digest is returned in binary or hexadecimal format.
*
* @return string The HMAC-MD5 digest
*/
function _HMAC_MD5($key, $data, $raw_output = FALSE)
{
if (strlen($key) > 64) {
$key = pack('H32', md5($key));
}
if (strlen($key) < 64) {
$key = str_pad($key, 64, chr(0));
}
$k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
$k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);
$inner = pack('H32', md5($k_ipad . $data));
$digest = md5($k_opad . $inner, $raw_output);
return $digest;
}
/**
* Function which implements HMAC-SHA-1 digest
*
* @param string $key The secret key
* @param string $data The data to hash
* @param bool $raw_output Whether the digest is returned in binary or hexadecimal format.
* @return string The HMAC-SHA-1 digest
* @author Jehan <jehan.marmottard@gmail.com>
* @access protected
*/
protected function _HMAC_SHA1($key, $data, $raw_output = FALSE)
{
if (strlen($key) > 64) {
$key = sha1($key, TRUE);
}
if (strlen($key) < 64) {
$key = str_pad($key, 64, chr(0));
}
$k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
$k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);
$inner = pack('H40', sha1($k_ipad . $data));
$digest = sha1($k_opad . $inner, $raw_output);
return $digest;
}
}
?>
SASL/SCRAM.php 0000644 00000030373 15151225160 0006670 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2011 Jehan |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Jehan <jehan.marmottard@gmail.com |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implementation of SCRAM-* SASL mechanisms.
* SCRAM mechanisms have 3 main steps (initial response, response to the server challenge, then server signature
* verification) which keep state-awareness. Therefore a single class instanciation must be done and reused for the whole
* authentication process.
*
* @author Jehan <jehan.marmottard@gmail.com>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_SCRAM extends Auth_SASL_Common
{
/**
* Construct a SCRAM-H client where 'H' is a cryptographic hash function.
*
* @param string $hash The name cryptographic hash function 'H' as registered by IANA in the "Hash Function Textual
* Names" registry.
* @link http://www.iana.org/assignments/hash-function-text-names/hash-function-text-names.xml "Hash Function Textual
* Names"
* format of core PHP hash function.
* @access public
*/
function __construct($hash)
{
// Though I could be strict, I will actually also accept the naming used in the PHP core hash framework.
// For instance "sha1" is accepted, while the registered hash name should be "SHA-1".
$hash = strtolower($hash);
$hashes = array('md2' => 'md2',
'md5' => 'md5',
'sha-1' => 'sha1',
'sha1' => 'sha1',
'sha-224' > 'sha224',
'sha224' > 'sha224',
'sha-256' => 'sha256',
'sha256' => 'sha256',
'sha-384' => 'sha384',
'sha384' => 'sha384',
'sha-512' => 'sha512',
'sha512' => 'sha512');
if (function_exists('hash_hmac') && isset($hashes[$hash]))
{
$this->hash = create_function('$data', 'return hash("' . $hashes[$hash] . '", $data, TRUE);');
$this->hmac = create_function('$key,$str,$raw', 'return hash_hmac("' . $hashes[$hash] . '", $str, $key, $raw);');
}
elseif ($hash == 'md5')
{
$this->hash = create_function('$data', 'return md5($data, true);');
$this->hmac = array($this, '_HMAC_MD5');
}
elseif (in_array($hash, array('sha1', 'sha-1')))
{
$this->hash = create_function('$data', 'return sha1($data, true);');
$this->hmac = array($this, '_HMAC_SHA1');
}
else
return PEAR::raiseError('Invalid SASL mechanism type');
}
/**
* Provides the (main) client response for SCRAM-H.
*
* @param string $authcid Authentication id (username)
* @param string $pass Password
* @param string $challenge The challenge sent by the server.
* If the challenge is NULL or an empty string, the result will be the "initial response".
* @param string $authzid Authorization id (username to proxy as)
* @return string|false The response (binary, NOT base64 encoded)
* @access public
*/
public function getResponse($authcid, $pass, $challenge = NULL, $authzid = NULL)
{
$authcid = $this->_formatName($authcid);
if (empty($authcid))
{
return false;
}
if (!empty($authzid))
{
$authzid = $this->_formatName($authzid);
if (empty($authzid))
{
return false;
}
}
if (empty($challenge))
{
return $this->_generateInitialResponse($authcid, $authzid);
}
else
{
return $this->_generateResponse($challenge, $pass);
}
}
/**
* Prepare a name for inclusion in a SCRAM response.
*
* @param string $username a name to be prepared.
* @return string the reformated name.
* @access private
*/
private function _formatName($username)
{
// TODO: prepare through the SASLprep profile of the stringprep algorithm.
// See RFC-4013.
$username = str_replace('=', '=3D', $username);
$username = str_replace(',', '=2C', $username);
return $username;
}
/**
* Generate the initial response which can be either sent directly in the first message or as a response to an empty
* server challenge.
*
* @param string $authcid Prepared authentication identity.
* @param string $authzid Prepared authorization identity.
* @return string The SCRAM response to send.
* @access private
*/
private function _generateInitialResponse($authcid, $authzid)
{
$init_rep = '';
$gs2_cbind_flag = 'n,'; // TODO: support channel binding.
$this->gs2_header = $gs2_cbind_flag . (!empty($authzid)? 'a=' . $authzid : '') . ',';
// I must generate a client nonce and "save" it for later comparison on second response.
$this->cnonce = $this->_getCnonce();
// XXX: in the future, when mandatory and/or optional extensions are defined in any updated RFC,
// this message can be updated.
$this->first_message_bare = 'n=' . $authcid . ',r=' . $this->cnonce;
return $this->gs2_header . $this->first_message_bare;
}
/**
* Parses and verifies a non-empty SCRAM challenge.
*
* @param string $challenge The SCRAM challenge
* @return string|false The response to send; false in case of wrong challenge or if an initial response has not
* been generated first.
* @access private
*/
private function _generateResponse($challenge, $password)
{
// XXX: as I don't support mandatory extension, I would fail on them.
// And I simply ignore any optional extension.
$server_message_regexp = "#^r=([\x21-\x2B\x2D-\x7E]+),s=((?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9]{3}=|[A-Xa-z0-9]{2}==)?),i=([0-9]*)(,[A-Za-z]=[^,])*$#";
if (!isset($this->cnonce, $this->gs2_header)
|| !preg_match($server_message_regexp, $challenge, $matches))
{
return false;
}
$nonce = $matches[1];
$salt = base64_decode($matches[2]);
if (!$salt)
{
// Invalid Base64.
return false;
}
$i = intval($matches[3]);
$cnonce = substr($nonce, 0, strlen($this->cnonce));
if ($cnonce <> $this->cnonce)
{
// Invalid challenge! Are we under attack?
return false;
}
$channel_binding = 'c=' . base64_encode($this->gs2_header); // TODO: support channel binding.
$final_message = $channel_binding . ',r=' . $nonce; // XXX: no extension.
// TODO: $password = $this->normalize($password); // SASLprep profile of stringprep.
$saltedPassword = $this->hi($password, $salt, $i);
$this->saltedPassword = $saltedPassword;
$clientKey = call_user_func($this->hmac, $saltedPassword, "Client Key", TRUE);
$storedKey = call_user_func($this->hash, $clientKey, TRUE);
$authMessage = $this->first_message_bare . ',' . $challenge . ',' . $final_message;
$this->authMessage = $authMessage;
$clientSignature = call_user_func($this->hmac, $storedKey, $authMessage, TRUE);
$clientProof = $clientKey ^ $clientSignature;
$proof = ',p=' . base64_encode($clientProof);
return $final_message . $proof;
}
/**
* SCRAM has also a server verification step. On a successful outcome, it will send additional data which must
* absolutely be checked against this function. If this fails, the entity which we are communicating with is probably
* not the server as it has not access to your ServerKey.
*
* @param string $data The additional data sent along a successful outcome.
* @return bool Whether the server has been authenticated.
* If false, the client must close the connection and consider to be under a MITM attack.
* @access public
*/
public function processOutcome($data)
{
$verifier_regexp = '#^v=((?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9]{3}=|[A-Xa-z0-9]{2}==)?)$#';
if (!isset($this->saltedPassword, $this->authMessage)
|| !preg_match($verifier_regexp, $data, $matches))
{
// This cannot be an outcome, you never sent the challenge's response.
return false;
}
$verifier = $matches[1];
$proposed_serverSignature = base64_decode($verifier);
$serverKey = call_user_func($this->hmac, $this->saltedPassword, "Server Key", true);
$serverSignature = call_user_func($this->hmac, $serverKey, $this->authMessage, TRUE);
return ($proposed_serverSignature === $serverSignature);
}
/**
* Hi() call, which is essentially PBKDF2 (RFC-2898) with HMAC-H() as the pseudorandom function.
*
* @param string $str The string to hash.
* @param string $hash The hash value.
* @param int $i The iteration count.
* @access private
*/
private function hi($str, $salt, $i)
{
$int1 = "\0\0\0\1";
$ui = call_user_func($this->hmac, $str, $salt . $int1, true);
$result = $ui;
for ($k = 1; $k < $i; $k++)
{
$ui = call_user_func($this->hmac, $str, $ui, true);
$result = $result ^ $ui;
}
return $result;
}
/**
* Creates the client nonce for the response
*
* @return string The cnonce value
* @access private
* @author Richard Heyes <richard@php.net>
*/
private function _getCnonce()
{
// TODO: I reused the nonce function from the DigestMD5 class.
// I should probably make this a protected function in Common.
if (@file_exists('/dev/urandom') && $fd = @fopen('/dev/urandom', 'r')) {
return base64_encode(fread($fd, 32));
} elseif (@file_exists('/dev/random') && $fd = @fopen('/dev/random', 'r')) {
return base64_encode(fread($fd, 32));
} else {
$str = '';
for ($i=0; $i<32; $i++) {
$str .= chr(mt_rand(0, 255));
}
return base64_encode($str);
}
}
}
?>
SASL/Anonymous.php 0000644 00000006575 15151225160 0010022 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implmentation of ANONYMOUS SASL mechanism
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_Anonymous extends Auth_SASL_Common
{
/**
* Not much to do here except return the token supplied.
* No encoding, hashing or encryption takes place for this
* mechanism, simply one of:
* o An email address
* o An opaque string not containing "@" that can be interpreted
* by the sysadmin
* o Nothing
*
* We could have some logic here for the second option, but this
* would by no means create something interpretable.
*
* @param string $token Optional email address or string to provide
* as trace information.
* @return string The unaltered input token
*/
function getResponse($token = '')
{
return $token;
}
}
?> SASL/Login.php 0000644 00000006117 15151225160 0007072 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* This is technically not a SASL mechanism, however
* it's used by Net_Sieve, Net_Cyrus and potentially
* other protocols , so here is a good place to abstract
* it.
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_Login extends Auth_SASL_Common
{
/**
* Pseudo SASL LOGIN mechanism
*
* @param string $user Username
* @param string $pass Password
* @return string LOGIN string
*/
function getResponse($user, $pass)
{
return sprintf('LOGIN %s %s', $user, $pass);
}
}
?> SASL/CramMD5.php 0000644 00000006524 15151225160 0007214 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implmentation of CRAM-MD5 SASL mechanism
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_CramMD5 extends Auth_SASL_Common
{
/**
* Implements the CRAM-MD5 SASL mechanism
* This DOES NOT base64 encode the return value,
* you will need to do that yourself.
*
* @param string $user Username
* @param string $pass Password
* @param string $challenge The challenge supplied by the server.
* this should be already base64_decoded.
*
* @return string The string to pass back to the server, of the form
* "<user> <digest>". This is NOT base64_encoded.
*/
function getResponse($user, $pass, $challenge)
{
return $user . ' ' . $this->_HMAC_MD5($pass, $challenge);
}
}
?> SASL/Plain.php 0000644 00000006075 15151225161 0007071 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Implmentation of PLAIN SASL mechanism
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('Auth/SASL/Common.php');
class Auth_SASL_Plain extends Auth_SASL_Common
{
/**
* Returns PLAIN response
*
* @param string $authcid Authentication id (username)
* @param string $pass Password
* @param string $authzid Autorization id
* @return string PLAIN Response
*/
function getResponse($authcid, $pass, $authzid = '')
{
return $authzid . chr(0) . $authcid . chr(0) . $pass;
}
}
?>
SASL.php 0000644 00000012325 15151225161 0006021 0 ustar 00 <?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Client implementation of various SASL mechanisms
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
require_once('PEAR.php');
class Auth_SASL
{
/**
* Factory class. Returns an object of the request
* type.
*
* @param string $type One of: Anonymous
* Plain
* CramMD5
* DigestMD5
* SCRAM-* (any mechanism of the SCRAM family)
* Types are not case sensitive
*/
public static function factory($type)
{
switch (strtolower($type)) {
case 'anonymous':
$filename = 'Auth/SASL/Anonymous.php';
$classname = 'Auth_SASL_Anonymous';
break;
case 'login':
$filename = 'Auth/SASL/Login.php';
$classname = 'Auth_SASL_Login';
break;
case 'plain':
$filename = 'Auth/SASL/Plain.php';
$classname = 'Auth_SASL_Plain';
break;
case 'external':
$filename = 'Auth/SASL/External.php';
$classname = 'Auth_SASL_External';
break;
case 'crammd5':
// $msg = 'Deprecated mechanism name. Use IANA-registered name: CRAM-MD5.';
// trigger_error($msg, E_USER_DEPRECATED);
case 'cram-md5':
$filename = 'Auth/SASL/CramMD5.php';
$classname = 'Auth_SASL_CramMD5';
break;
case 'digestmd5':
// $msg = 'Deprecated mechanism name. Use IANA-registered name: DIGEST-MD5.';
// trigger_error($msg, E_USER_DEPRECATED);
case 'digest-md5':
// $msg = 'DIGEST-MD5 is a deprecated SASL mechanism as per RFC-6331. Using it could be a security risk.';
// trigger_error($msg, E_USER_NOTICE);
$filename = 'Auth/SASL/DigestMD5.php';
$classname = 'Auth_SASL_DigestMD5';
break;
default:
$scram = '/^SCRAM-(.{1,9})$/i';
if (preg_match($scram, $type, $matches))
{
$hash = $matches[1];
$filename = dirname(__FILE__) .'/SASL/SCRAM.php';
$classname = 'Auth_SASL_SCRAM';
$parameter = $hash;
break;
}
return PEAR::raiseError('Invalid SASL mechanism type');
break;
}
require_once($filename);
if (isset($parameter))
$obj = new $classname($parameter);
else
$obj = new $classname();
return $obj;
}
}
?>
