$this->interactiveBuffer.= substr($response[NET_SSH1_RESPONSE_DATA], 4);
* Inputs a command into an interactive shell.
* @see self::interactiveRead()
function interactiveWrite($cmd)
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) {
user_error('Operation disallowed prior to login()');
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) {
user_error('Unable to initiate an interactive shell session');
$data = pack('CNa*', NET_SSH1_CMSG_STDIN_DATA, strlen($cmd), $cmd);
if (!$this->_send_binary_packet($data)) {
user_error('Error sending SSH_CMSG_STDIN');
* Returns the output of an interactive shell when no more output is available.
* Requires PHP 4.3.0 or later due to the use of the stream_select() function. If you see stuff like
* "^[[00m", you're seeing ANSI escape codes. According to
* {@link http://support.microsoft.com/kb/101875 How to Enable ANSI.SYS in a Command Window}, "Windows NT
* does not support ANSI escape sequences in Win32 Console applications", so if you're a Windows user,
* there's not going to be much recourse.
* @see self::interactiveRead()
function interactiveRead()
if (!($this->bitmap & NET_SSH1_MASK_LOGIN)) {
user_error('Operation disallowed prior to login()');
if (!($this->bitmap & NET_SSH1_MASK_SHELL) && !$this->_initShell()) {
user_error('Unable to initiate an interactive shell session');
$read = array($this->fsock);
if (stream_select($read, $write, $except, 0)) {
$response = $this->_get_binary_packet();
return substr($response[NET_SSH1_RESPONSE_DATA], 4);
* Will be called, automatically, if you're supporting just PHP5. If you're supporting PHP4, you'll need to call
function _disconnect($msg = 'Client Quit')
$data = pack('C', NET_SSH1_CMSG_EOF);
$this->_send_binary_packet($data);
$response = $this->_get_binary_packet();
if ($response === true) {
$response = array(NET_SSH1_RESPONSE_TYPE => -1);
switch ($response[NET_SSH1_RESPONSE_TYPE]) {
case NET_SSH1_SMSG_EXITSTATUS:
$data = pack('C', NET_SSH1_CMSG_EXIT_CONFIRMATION);
$data = pack('CNa*', NET_SSH1_MSG_DISCONNECT, strlen($msg), $msg);
$data = pack('CNa*', NET_SSH1_MSG_DISCONNECT, strlen($msg), $msg);
$this->_send_binary_packet($data);
* See 'The Binary Packet Protocol' of protocol-1.5.txt for more info.
* Also, this function could be improved upon by adding detection for the following exploit:
* http://www.securiteam.com/securitynews/5LP042K3FY.html
* @see self::_send_binary_packet()
function _get_binary_packet()
if (feof($this->fsock)) {
//user_error('connection closed prematurely');
$read = array($this->fsock);
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
$sec = floor($this->curTimeout);
$usec = 1000000 * ($this->curTimeout - $sec);
// on windows this returns a "Warning: Invalid CRT parameters detected" error
if (!@stream_select($read, $write, $except, $sec, $usec) && !count($read)) {
//$this->_disconnect('Timeout');
$elapsed = strtok(microtime(), ' ') + strtok('') - $start;
$this->curTimeout-= $elapsed;
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
$data = fread($this->fsock, 4);
$temp = unpack('Nlength', $data);
$padding_length = 8 - ($temp['length'] & 7);
$length = $temp['length'] + $padding_length;
$temp = fread($this->fsock, $length);
if (strlen($temp) != $length) {
$stop = strtok(microtime(), ' ') + strtok('');
if (strlen($raw) && $this->crypto !== false) {
$raw = $this->crypto->decrypt($raw);
$padding = substr($raw, 0, $padding_length);
$type = $raw[$padding_length];
$data = substr($raw, $padding_length + 1, -4);
$temp = unpack('Ncrc', substr($raw, -4));
//if ( $temp['crc'] != $this->_crc($padding . $type . $data) ) {
// user_error('Bad CRC in packet from server');
if (defined('NET_SSH1_LOGGING')) {
$temp = isset($this->protocol_flags[$type]) ? $this->protocol_flags[$type] : 'UNKNOWN';
' (' . round($stop - $start, 4) . 's)';
$this->_append_log($temp, $data);
NET_SSH1_RESPONSE_TYPE => $type,
NET_SSH1_RESPONSE_DATA => $data
* Returns true on success, false on failure.
* @see self::_get_binary_packet()
function _send_binary_packet($data)
if (feof($this->fsock)) {
//user_error('connection closed prematurely');
$length = strlen($data) + 4;
$padding = crypt_random_string(8 - ($length & 7));
$data = $padding . $data;
$data.= pack('N', $this->_crc($data));
if ($this->crypto !== false) {
$data = $this->crypto->encrypt($data);
$packet = pack('Na*', $length, $data);
$start = strtok(microtime(), ' ') + strtok(''); // http://php.net/microtime#61838
$result = strlen($packet) == fputs($this->fsock, $packet);
$stop = strtok(microtime(), ' ') + strtok('');
if (defined('NET_SSH1_LOGGING')) {
$temp = isset($this->protocol_flags[ord($orig[0])]) ? $this->protocol_flags[ord($orig[0])] : 'UNKNOWN';
' (' . round($stop - $start, 4) . 's)';
$this->_append_log($temp, $orig);
* Cyclic Redundancy Check (CRC)
* PHP's crc32 function is implemented slightly differently than the one that SSH v1 uses, so
* we've reimplemented it. A more detailed discussion of the differences can be found after
* $crc_lookup_table's initialization.
* @see self::_get_binary_packet()
* @see self::_send_binary_packet()
static $crc_lookup_table = array(
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
// For this function to yield the same output as PHP's crc32 function, $crc would have to be
// set to 0xFFFFFFFF, initially - not 0x00000000 as it currently is.
for ($i=0; $i<$length; $i++) {
// We AND $crc >> 8 with 0x00FFFFFF because we want the eight newly added bits to all
// be zero. PHP, unfortunately, doesn't always do this. 0x80000000 >> 8, as an example,
// yields 0xFF800000 - not 0x00800000. The following link elaborates:
// http://www.php.net/manual/en/language.operators.bitwise.php#57281
$crc = (($crc >> 8) & 0x00FFFFFF) ^ $crc_lookup_table[($crc & 0xFF) ^ ord($data[$i])];
// In addition to having to set $crc to 0xFFFFFFFF, initially, the return value must be XOR'd with
// 0xFFFFFFFF for this function to return the same thing that PHP's crc32 function would.
* Inspired by array_shift
function _string_shift(&$string, $index = 1)
$substr = substr($string, 0, $index);
$string = substr($string, $index);
* Returns mod(pow($m, $e), $n), where $n should be the product of two (large) primes $p and $q and where $e
* should be a number with the property that gcd($e, ($p - 1) * ($q - 1)) == 1. Could just make anything that
* calls this call modexp, instead, but I think this makes things clearer, maybe...
* @param Math_BigInteger $m
* @return Math_BigInteger
function _rsa_crypt($m, $key)
if (!class_exists('Crypt_RSA')) {
include_once 'Crypt/RSA.php';
$rsa->loadKey($key, CRYPT_RSA_PUBLIC_FORMAT_RAW);
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
return $rsa->encrypt($m);
// To quote from protocol-1.5.txt:
// The most significant byte (which is only partial as the value must be
// less than the public modulus, which is never a power of two) is zero.
// The next byte contains the value 2 (which stands for public-key
// encrypted data in the PKCS standard [PKCS#1]). Then, there are non-
// zero random bytes to fill any unused space, a zero byte, and the data
// to be encrypted in the least significant bytes, the last byte of the
// data in the least significant byte.
// Presumably the part of PKCS#1 they're refering to is "Section 7.2.1 Encryption Operation",
// under "7.2 RSAES-PKCS1-v1.5" and "7 Encryption schemes" of the following URL:
// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1.pdf
$modulus = $key[1]->toBytes();
$length = strlen($modulus) - strlen($m) - 3;
while (strlen($random) != $length) {
$block = crypt_random_string($length - strlen($random));
$block = str_replace("\x00", '', $block);
$temp = chr(0) . chr(2) . $random . chr(0) . $m;
$m = new Math_BigInteger($temp, 256);
$m = $m->modPow($key[0], $key[1]);
* Takes any number of arrays whose indices are integers and whose values are strings and defines a bunch of
* named constants from it, using the value as the name of the constant and the index as the value of the constant.
* If any of the constants that would be defined already exists, none of the constants will be defined.
foreach ($args as $arg) {
foreach ($arg as $key => $value) {
* Returns a log of the packets that have been sent and received.
* Returns a string if NET_SSH1_LOGGING == NET_SSH1_LOG_COMPLEX, an array if NET_SSH1_LOGGING == NET_SSH1_LOG_SIMPLE and false if !defined('NET_SSH1_LOGGING')
* @return array|false|string
if (!defined('NET_SSH1_LOGGING')) {
switch (NET_SSH1_LOGGING) {
case NET_SSH1_LOG_SIMPLE:
return $this->message_number_log;
case NET_SSH1_LOG_COMPLEX:
return $this->_format_log($this->message_log, $this->protocol_flags_log);
* Formats a log for printing
* @param array $message_log
* @param array $message_number_log
function _format_log($message_log, $message_number_log)
for ($i = 0; $i < count($message_log); $i++) {
$output.= $message_number_log[$i] . "\r\n";
$current_log = $message_log[$i];
if (strlen($current_log)) {
$output.= str_pad(dechex($j), 7, '0', STR_PAD_LEFT) . '0 ';
$fragment = $this->_string_shift($current_log, $this->log_short_width);
$hex = substr(preg_replace_callback('#.#s', array($this, '_format_log_helper'), $fragment), strlen($this->log_boundary));
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
