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Split System_SSH_Agent and System_SSH_Agent_Identity into separate files

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This commit is contained in:
Clint Nelissen 2014-12-01 19:18:58 -08:00
parent 43d2e9ef68
commit b32c05b64e
2 changed files with 175 additions and 139 deletions
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141
phpseclib/System/SSH/Agent.php
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@ -65,145 +65,8 @@ define('SYSTEM_SSH_AGENTC_SIGN_REQUEST', 13);
define('SYSTEM_SSH_AGENT_SIGN_RESPONSE', 14);
/**#@-*/
/**
* Pure-PHP ssh-agent client identity object
*
* Instantiation should only be performed by System_SSH_Agent class.
* This could be thought of as implementing an interface that Crypt_RSA
* implements. ie. maybe a Net_SSH_Auth_PublicKey interface or something.
* The methods in this interface would be getPublicKey, setSignatureMode
* and sign since those are the methods phpseclib looks for to perform
* public key authentication.
*
* @package System_SSH_Agent
* @author Jim Wigginton <terrafrost@php.net>
* @access internal
*/
class System_SSH_Agent_Identity
{
/**
* Key Object
*
* @var Crypt_RSA
* @access private
* @see System_SSH_Agent_Identity::getPublicKey()
*/
var $key;
/**
* Key Blob
*
* @var String
* @access private
* @see System_SSH_Agent_Identity::sign()
*/
var $key_blob;
/**
* Socket Resource
*
* @var Resource
* @access private
* @see System_SSH_Agent_Identity::sign()
*/
var $fsock;
/**
* Default Constructor.
*
* @param Resource $fsock
* @return System_SSH_Agent_Identity
* @access private
*/
function __construct($fsock)
{
$this->fsock = $fsock;
}
/**
* Set Public Key
*
* Called by System_SSH_Agent::requestIdentities()
*
* @param Crypt_RSA $key
* @access private
*/
function setPublicKey($key)
{
$this->key = $key;
$this->key->setPublicKey();
}
/**
* Set Public Key
*
* Called by System_SSH_Agent::requestIdentities(). The key blob could be extracted from $this->key
* but this saves a small amount of computation.
*
* @param String $key_blob
* @access private
*/
function setPublicKeyBlob($key_blob)
{
$this->key_blob = $key_blob;
}
/**
* Get Public Key
*
* Wrapper for $this->key->getPublicKey()
*
* @param Integer $format optional
* @return Mixed
* @access public
*/
function getPublicKey($format = null)
{
return !isset($format) ? $this->key->getPublicKey() : $this->key->getPublicKey($format);
}
/**
* Set Signature Mode
*
* Doesn't do anything as ssh-agent doesn't let you pick and choose the signature mode. ie.
* ssh-agent's only supported mode is CRYPT_RSA_SIGNATURE_PKCS1
*
* @param Integer $mode
* @access public
*/
function setSignatureMode($mode)
{
}
/**
* Create a signature
*
* See "2.6.2 Protocol 2 private key signature request"
*
* @param String $message
* @return String
* @access public
*/
function sign($message)
{
// the last parameter (currently 0) is for flags and ssh-agent only defines one flag (for ssh-dss): SSH_AGENT_OLD_SIGNATURE
$packet = pack('CNa*Na*N', SYSTEM_SSH_AGENTC_SIGN_REQUEST, strlen($this->key_blob), $this->key_blob, strlen($message), $message, 0);
$packet = pack('Na*', strlen($packet), $packet);
if (strlen($packet) != fputs($this->fsock, $packet)) {
user_error('Connection closed during signing');
}
$length = current(unpack('N', fread($this->fsock, 4)));
$type = ord(fread($this->fsock, 1));
if ($type != SYSTEM_SSH_AGENT_SIGN_RESPONSE) {
user_error('Unable to retreive signature');
}
$signature_blob = fread($this->fsock, $length - 1);
// the only other signature format defined - ssh-dss - is the same length as ssh-rsa
// the + 12 is for the other various SSH added length fields
return substr($signature_blob, strlen('ssh-rsa') + 12);
}
if (!class_exists('System_SSH_Agent_Identity')) {
include_once 'Agent/Identity.php';
}
/**

173
phpseclib/System/SSH/Agent/Identity.php Normal file
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@ -0,0 +1,173 @@
<?php
/**
* Pure-PHP ssh-agent client.
*
* PHP versions 4 and 5
*
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @category System
* @package System_SSH_Agent
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMXIV Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
* @internal See http://api.libssh.org/rfc/PROTOCOL.agent
*/
/**
* Pure-PHP ssh-agent client identity object
*
* Instantiation should only be performed by System_SSH_Agent class.
* This could be thought of as implementing an interface that Crypt_RSA
* implements. ie. maybe a Net_SSH_Auth_PublicKey interface or something.
* The methods in this interface would be getPublicKey, setSignatureMode
* and sign since those are the methods phpseclib looks for to perform
* public key authentication.
*
* @package System_SSH_Agent
* @author Jim Wigginton <terrafrost@php.net>
* @access internal
*/
class System_SSH_Agent_Identity
{
/**
* Key Object
*
* @var Crypt_RSA
* @access private
* @see System_SSH_Agent_Identity::getPublicKey()
*/
var $key;
/**
* Key Blob
*
* @var String
* @access private
* @see System_SSH_Agent_Identity::sign()
*/
var $key_blob;
/**
* Socket Resource
*
* @var Resource
* @access private
* @see System_SSH_Agent_Identity::sign()
*/
var $fsock;
/**
* Default Constructor.
*
* @param Resource $fsock
* @return System_SSH_Agent_Identity
* @access private
*/
function __construct($fsock)
{
$this->fsock = $fsock;
}
/**
* Set Public Key
*
* Called by System_SSH_Agent::requestIdentities()
*
* @param Crypt_RSA $key
* @access private
*/
function setPublicKey($key)
{
$this->key = $key;
$this->key->setPublicKey();
}
/**
* Set Public Key
*
* Called by System_SSH_Agent::requestIdentities(). The key blob could be extracted from $this->key
* but this saves a small amount of computation.
*
* @param String $key_blob
* @access private
*/
function setPublicKeyBlob($key_blob)
{
$this->key_blob = $key_blob;
}
/**
* Get Public Key
*
* Wrapper for $this->key->getPublicKey()
*
* @param Integer $format optional
* @return Mixed
* @access public
*/
function getPublicKey($format = null)
{
return !isset($format) ? $this->key->getPublicKey() : $this->key->getPublicKey($format);
}
/**
* Set Signature Mode
*
* Doesn't do anything as ssh-agent doesn't let you pick and choose the signature mode. ie.
* ssh-agent's only supported mode is CRYPT_RSA_SIGNATURE_PKCS1
*
* @param Integer $mode
* @access public
*/
function setSignatureMode($mode)
{
}
/**
* Create a signature
*
* See "2.6.2 Protocol 2 private key signature request"
*
* @param String $message
* @return String
* @access public
*/
function sign($message)
{
// the last parameter (currently 0) is for flags and ssh-agent only defines one flag (for ssh-dss): SSH_AGENT_OLD_SIGNATURE
$packet = pack('CNa*Na*N', SYSTEM_SSH_AGENTC_SIGN_REQUEST, strlen($this->key_blob), $this->key_blob, strlen($message), $message, 0);
$packet = pack('Na*', strlen($packet), $packet);
if (strlen($packet) != fputs($this->fsock, $packet)) {
user_error('Connection closed during signing');
}
$length = current(unpack('N', fread($this->fsock, 4)));
$type = ord(fread($this->fsock, 1));
if ($type != SYSTEM_SSH_AGENT_SIGN_RESPONSE) {
user_error('Unable to retreive signature');
}
$signature_blob = fread($this->fsock, $length - 1);
// the only other signature format defined - ssh-dss - is the same length as ssh-rsa
// the + 12 is for the other various SSH added length fields
return substr($signature_blob, strlen('ssh-rsa') + 12);
}
}