diff options
Diffstat (limited to 'libs/phpseclib-1.0.4/phpseclib/System')
| -rw-r--r-- | libs/phpseclib-1.0.4/phpseclib/System/SSH/Agent.php | 486 | ||||
| -rw-r--r-- | libs/phpseclib-1.0.4/phpseclib/System/SSH_Agent.php | 39 |
2 files changed, 525 insertions, 0 deletions
diff --git a/libs/phpseclib-1.0.4/phpseclib/System/SSH/Agent.php b/libs/phpseclib-1.0.4/phpseclib/System/SSH/Agent.php new file mode 100644 index 0000000..7388cb4 --- /dev/null +++ b/libs/phpseclib-1.0.4/phpseclib/System/SSH/Agent.php @@ -0,0 +1,486 @@ +<?php + +/** + * Pure-PHP ssh-agent client. + * + * PHP versions 4 and 5 + * + * Here are some examples of how to use this library: + * <code> + * <?php + * include 'System/SSH/Agent.php'; + * include 'Net/SSH2.php'; + * + * $agent = new System_SSH_Agent(); + * + * $ssh = new Net_SSH2('www.domain.tld'); + * if (!$ssh->login('username', $agent)) { + * exit('Login Failed'); + * } + * + * echo $ssh->exec('pwd'); + * echo $ssh->exec('ls -la'); + * ?> + * </code> + * + * 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 2014 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 + */ + +/**#@+ + * Message numbers + * + * @access private + */ +// to request SSH1 keys you have to use SSH_AGENTC_REQUEST_RSA_IDENTITIES (1) +define('SYSTEM_SSH_AGENTC_REQUEST_IDENTITIES', 11); +// this is the SSH2 response; the SSH1 response is SSH_AGENT_RSA_IDENTITIES_ANSWER (2). +define('SYSTEM_SSH_AGENT_IDENTITIES_ANSWER', 12); +define('SYSTEM_SSH_AGENT_FAILURE', 5); +// the SSH1 request is SSH_AGENTC_RSA_CHALLENGE (3) +define('SYSTEM_SSH_AGENTC_SIGN_REQUEST', 13); +// the SSH1 response is SSH_AGENT_RSA_RESPONSE (4) +define('SYSTEM_SSH_AGENT_SIGN_RESPONSE', 14); + + +/**@+ + * Agent forwarding status + * + * @access private + */ +// no forwarding requested and not active +define('SYSTEM_SSH_AGENT_FORWARD_NONE', 0); +// request agent forwarding when opportune +define('SYSTEM_SSH_AGENT_FORWARD_REQUEST', 1); +// forwarding has been request and is active +define('SYSTEM_SSH_AGENT_FORWARD_ACTIVE', 2); + +/**#@-*/ + +/** + * 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 self::getPublicKey() + */ + var $key; + + /** + * Key Blob + * + * @var string + * @access private + * @see self::sign() + */ + var $key_blob; + + /** + * Socket Resource + * + * @var resource + * @access private + * @see self::sign() + */ + var $fsock; + + /** + * Default Constructor. + * + * @param resource $fsock + * @return System_SSH_Agent_Identity + * @access private + */ + function __construct($fsock) + { + $this->fsock = $fsock; + } + + /** + * PHP4 compatible Default Constructor. + * + * @see self::__construct() + * @param resource $fsock + * @access public + */ + function System_SSH_Agent_Identity($fsock) + { + $this->__construct($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 int $format optional + * @return mixed + * @access public + */ + function getPublicKey($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 int $mode + * @access public + */ + function setSignatureMode($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); + } +} + +/** + * Pure-PHP ssh-agent client identity factory + * + * requestIdentities() method pumps out System_SSH_Agent_Identity objects + * + * @package System_SSH_Agent + * @author Jim Wigginton <terrafrost@php.net> + * @access internal + */ +class System_SSH_Agent +{ + /** + * Socket Resource + * + * @var resource + * @access private + */ + var $fsock; + + /** + * Agent forwarding status + * + * @access private + */ + var $forward_status = SYSTEM_SSH_AGENT_FORWARD_NONE; + + /** + * Buffer for accumulating forwarded authentication + * agent data arriving on SSH data channel destined + * for agent unix socket + * + * @access private + */ + var $socket_buffer = ''; + + /** + * Tracking the number of bytes we are expecting + * to arrive for the agent socket on the SSH data + * channel + */ + var $expected_bytes = 0; + + /** + * Default Constructor + * + * @return System_SSH_Agent + * @access public + */ + function __construct() + { + switch (true) { + case isset($_SERVER['SSH_AUTH_SOCK']): + $address = $_SERVER['SSH_AUTH_SOCK']; + break; + case isset($_ENV['SSH_AUTH_SOCK']): + $address = $_ENV['SSH_AUTH_SOCK']; + break; + default: + user_error('SSH_AUTH_SOCK not found'); + return false; + } + + $this->fsock = fsockopen('unix://' . $address, 0, $errno, $errstr); + if (!$this->fsock) { + user_error("Unable to connect to ssh-agent (Error $errno: $errstr)"); + } + } + + /** + * PHP4 compatible Default Constructor. + * + * @see self::__construct() + * @access public + */ + function System_SSH_Agent() + { + $this->__construct(); + } + + /** + * Request Identities + * + * See "2.5.2 Requesting a list of protocol 2 keys" + * Returns an array containing zero or more System_SSH_Agent_Identity objects + * + * @return array + * @access public + */ + function requestIdentities() + { + if (!$this->fsock) { + return array(); + } + + $packet = pack('NC', 1, SYSTEM_SSH_AGENTC_REQUEST_IDENTITIES); + if (strlen($packet) != fputs($this->fsock, $packet)) { + user_error('Connection closed while requesting identities'); + } + + $length = current(unpack('N', fread($this->fsock, 4))); + $type = ord(fread($this->fsock, 1)); + if ($type != SYSTEM_SSH_AGENT_IDENTITIES_ANSWER) { + user_error('Unable to request identities'); + } + + $identities = array(); + $keyCount = current(unpack('N', fread($this->fsock, 4))); + for ($i = 0; $i < $keyCount; $i++) { + $length = current(unpack('N', fread($this->fsock, 4))); + $key_blob = fread($this->fsock, $length); + $key_str = 'ssh-rsa ' . base64_encode($key_blob); + $length = current(unpack('N', fread($this->fsock, 4))); + if ($length) { + $key_str.= ' ' . fread($this->fsock, $length); + } + $length = current(unpack('N', substr($key_blob, 0, 4))); + $key_type = substr($key_blob, 4, $length); + switch ($key_type) { + case 'ssh-rsa': + if (!class_exists('Crypt_RSA')) { + include_once 'Crypt/RSA.php'; + } + $key = new Crypt_RSA(); + $key->loadKey($key_str); + break; + case 'ssh-dss': + // not currently supported + break; + } + // resources are passed by reference by default + if (isset($key)) { + $identity = new System_SSH_Agent_Identity($this->fsock); + $identity->setPublicKey($key); + $identity->setPublicKeyBlob($key_blob); + $identities[] = $identity; + unset($key); + } + } + + return $identities; + } + + /** + * Signal that agent forwarding should + * be requested when a channel is opened + * + * @param Net_SSH2 $ssh + * @return bool + * @access public + */ + function startSSHForwarding($ssh) + { + if ($this->forward_status == SYSTEM_SSH_AGENT_FORWARD_NONE) { + $this->forward_status = SYSTEM_SSH_AGENT_FORWARD_REQUEST; + } + } + + /** + * Request agent forwarding of remote server + * + * @param Net_SSH2 $ssh + * @return bool + * @access private + */ + function _request_forwarding($ssh) + { + $request_channel = $ssh->_get_open_channel(); + if ($request_channel === false) { + return false; + } + + $packet = pack( + 'CNNa*C', + NET_SSH2_MSG_CHANNEL_REQUEST, + $ssh->server_channels[$request_channel], + strlen('auth-agent-req@openssh.com'), + 'auth-agent-req@openssh.com', + 1 + ); + + $ssh->channel_status[$request_channel] = NET_SSH2_MSG_CHANNEL_REQUEST; + + if (!$ssh->_send_binary_packet($packet)) { + return false; + } + + $response = $ssh->_get_channel_packet($request_channel); + if ($response === false) { + return false; + } + + $ssh->channel_status[$request_channel] = NET_SSH2_MSG_CHANNEL_OPEN; + $this->forward_status = SYSTEM_SSH_AGENT_FORWARD_ACTIVE; + + return true; + } + + /** + * On successful channel open + * + * This method is called upon successful channel + * open to give the SSH Agent an opportunity + * to take further action. i.e. request agent forwarding + * + * @param Net_SSH2 $ssh + * @access private + */ + function _on_channel_open($ssh) + { + if ($this->forward_status == SYSTEM_SSH_AGENT_FORWARD_REQUEST) { + $this->_request_forwarding($ssh); + } + } + + /** + * Forward data to SSH Agent and return data reply + * + * @param string $data + * @return data from SSH Agent + * @access private + */ + function _forward_data($data) + { + if ($this->expected_bytes > 0) { + $this->socket_buffer.= $data; + $this->expected_bytes -= strlen($data); + } else { + $agent_data_bytes = current(unpack('N', $data)); + $current_data_bytes = strlen($data); + $this->socket_buffer = $data; + if ($current_data_bytes != $agent_data_bytes + 4) { + $this->expected_bytes = ($agent_data_bytes + 4) - $current_data_bytes; + return false; + } + } + + if (strlen($this->socket_buffer) != fwrite($this->fsock, $this->socket_buffer)) { + user_error('Connection closed attempting to forward data to SSH agent'); + } + + $this->socket_buffer = ''; + $this->expected_bytes = 0; + + $agent_reply_bytes = current(unpack('N', fread($this->fsock, 4))); + + $agent_reply_data = fread($this->fsock, $agent_reply_bytes); + $agent_reply_data = current(unpack('a*', $agent_reply_data)); + + return pack('Na*', $agent_reply_bytes, $agent_reply_data); + } +} diff --git a/libs/phpseclib-1.0.4/phpseclib/System/SSH_Agent.php b/libs/phpseclib-1.0.4/phpseclib/System/SSH_Agent.php new file mode 100644 index 0000000..ea434b9 --- /dev/null +++ b/libs/phpseclib-1.0.4/phpseclib/System/SSH_Agent.php @@ -0,0 +1,39 @@ +<?php +/** + * Pure-PHP ssh-agent client wrapper + * + * PHP versions 4 and 5 + * + * Originally System_SSH_Agent was accessed as System/SSH_Agent.php instead of + * System/SSH/Agent.php. The problem with this is that PSR0 compatible autoloaders + * don't support that kind of directory layout hence the package being moved and + * this "alias" being created to maintain backwards compatibility. + * + * 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 2014 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 + */ + +require_once 'SSH/Agent.php'; |