/**
* Convert a private key to the appropriate format.
*
* @access private
* @see setPrivateKeyFormat()
* @param String $RSAPrivateKey
* @return String
*/
function _convertPrivateKey($n, $e, $d, $primes, $exponents, $coefficients)
{
$signed = $this->privateKeyFormat != self::PRIVATE_FORMAT_XML;
$num_primes = count($primes);
$raw = array('version' => $num_primes == 2 ? chr(0) : chr(1), 'modulus' => $n->toBytes($signed), 'publicExponent' => $e->toBytes($signed), 'privateExponent' => $d->toBytes($signed), 'prime1' => $primes[1]->toBytes($signed), 'prime2' => $primes[2]->toBytes($signed), 'exponent1' => $exponents[1]->toBytes($signed), 'exponent2' => $exponents[2]->toBytes($signed), 'coefficient' => $coefficients[2]->toBytes($signed));
// if the format in question does not support multi-prime rsa and multi-prime rsa was used,
// call _convertPublicKey() instead.
switch ($this->privateKeyFormat) {
case self::PRIVATE_FORMAT_XML:
if ($num_primes != 2) {
return false;
}
return "<RSAKeyValue>\r\n" . ' <Modulus>' . base64_encode($raw['modulus']) . "</Modulus>\r\n" . ' <Exponent>' . base64_encode($raw['publicExponent']) . "</Exponent>\r\n" . ' <P>' . base64_encode($raw['prime1']) . "</P>\r\n" . ' <Q>' . base64_encode($raw['prime2']) . "</Q>\r\n" . ' <DP>' . base64_encode($raw['exponent1']) . "</DP>\r\n" . ' <DQ>' . base64_encode($raw['exponent2']) . "</DQ>\r\n" . ' <InverseQ>' . base64_encode($raw['coefficient']) . "</InverseQ>\r\n" . ' <D>' . base64_encode($raw['privateExponent']) . "</D>\r\n" . '</RSAKeyValue>';
break;
case self::PRIVATE_FORMAT_PUTTY:
if ($num_primes != 2) {
return false;
}
$key = "PuTTY-User-Key-File-2: ssh-rsa\r\nEncryption: ";
$encryption = !empty($this->password) || is_string($this->password) ? 'aes256-cbc' : 'none';
$key .= $encryption;
$key .= "\r\nComment: " . $this->comment . "\r\n";
$public = pack('Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($raw['publicExponent']), $raw['publicExponent'], strlen($raw['modulus']), $raw['modulus']);
$source = pack('Na*Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($encryption), $encryption, strlen($this->comment), $this->comment, strlen($public), $public);
$public = base64_encode($public);
$key .= "Public-Lines: " . (strlen($public) + 63 >> 6) . "\r\n";
$key .= chunk_split($public, 64);
$private = pack('Na*Na*Na*Na*', strlen($raw['privateExponent']), $raw['privateExponent'], strlen($raw['prime1']), $raw['prime1'], strlen($raw['prime2']), $raw['prime2'], strlen($raw['coefficient']), $raw['coefficient']);
if (empty($this->password) && !is_string($this->password)) {
$source .= pack('Na*', strlen($private), $private);
$hashkey = 'putty-private-key-file-mac-key';
} else {
$private .= Random::string(16 - (strlen($private) & 15));
$source .= pack('Na*', strlen($private), $private);
$sequence = 0;
$symkey = '';
while (strlen($symkey) < 32) {
$temp = pack('Na*', $sequence++, $this->password);
$symkey .= pack('H*', sha1($temp));
}
$symkey = substr($symkey, 0, 32);
$crypto = new AES();
$crypto->setKey($symkey);
$crypto->disablePadding();
$private = $crypto->encrypt($private);
$hashkey = 'putty-private-key-file-mac-key' . $this->password;
}
$private = base64_encode($private);
$key .= 'Private-Lines: ' . (strlen($private) + 63 >> 6) . "\r\n";
$key .= chunk_split($private, 64);
$hash = new Hash('sha1');
$hash->setKey(pack('H*', sha1($hashkey)));
$key .= 'Private-MAC: ' . bin2hex($hash->hash($source)) . "\r\n";
return $key;
default:
// eg. self::PRIVATE_FORMAT_PKCS1
$components = array();
foreach ($raw as $name => $value) {
$components[$name] = pack('Ca*a*', self::ASN1_INTEGER, $this->_encodeLength(strlen($value)), $value);
}
$RSAPrivateKey = implode('', $components);
if ($num_primes > 2) {
$OtherPrimeInfos = '';
for ($i = 3; $i <= $num_primes; $i++) {
// OtherPrimeInfos ::= SEQUENCE SIZE(1..MAX) OF OtherPrimeInfo
//
// OtherPrimeInfo ::= SEQUENCE {
// prime INTEGER, -- ri
// exponent INTEGER, -- di
// coefficient INTEGER -- ti
// }
$OtherPrimeInfo = pack('Ca*a*', self::ASN1_INTEGER, $this->_encodeLength(strlen($primes[$i]->toBytes(true))), $primes[$i]->toBytes(true));
$OtherPrimeInfo .= pack('Ca*a*', self::ASN1_INTEGER, $this->_encodeLength(strlen($exponents[$i]->toBytes(true))), $exponents[$i]->toBytes(true));
$OtherPrimeInfo .= pack('Ca*a*', self::ASN1_INTEGER, $this->_encodeLength(strlen($coefficients[$i]->toBytes(true))), $coefficients[$i]->toBytes(true));
$OtherPrimeInfos .= pack('Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($OtherPrimeInfo)), $OtherPrimeInfo);
}
$RSAPrivateKey .= pack('Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($OtherPrimeInfos)), $OtherPrimeInfos);
}
$RSAPrivateKey = pack('Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey);
if ($this->privateKeyFormat == self::PRIVATE_FORMAT_PKCS8) {
$rsaOID = pack('H*', '300d06092a864886f70d0101010500');
// hex version of MA0GCSqGSIb3DQEBAQUA
$RSAPrivateKey = pack('Ca*a*Ca*a*', self::ASN1_INTEGER, "", $rsaOID, 4, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey);
$RSAPrivateKey = pack('Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey);
if (!empty($this->password) || is_string($this->password)) {
$salt = Random::string(8);
$iterationCount = 2048;
$crypto = new DES();
$crypto->setPassword($this->password, 'pbkdf1', 'md5', $salt, $iterationCount);
$RSAPrivateKey = $crypto->encrypt($RSAPrivateKey);
$parameters = pack('Ca*a*Ca*N', self::ASN1_OCTETSTRING, $this->_encodeLength(strlen($salt)), $salt, self::ASN1_INTEGER, $this->_encodeLength(4), $iterationCount);
$pbeWithMD5AndDES_CBC = "*†H†÷\r";
$encryptionAlgorithm = pack('Ca*a*Ca*a*', self::ASN1_OBJECT, $this->_encodeLength(strlen($pbeWithMD5AndDES_CBC)), $pbeWithMD5AndDES_CBC, self::ASN1_SEQUENCE, $this->_encodeLength(strlen($parameters)), $parameters);
$RSAPrivateKey = pack('Ca*a*Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($encryptionAlgorithm)), $encryptionAlgorithm, self::ASN1_OCTETSTRING, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey);
$RSAPrivateKey = pack('Ca*a*', self::ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey);
$RSAPrivateKey = "-----BEGIN ENCRYPTED PRIVATE KEY-----\r\n" . chunk_split(base64_encode($RSAPrivateKey), 64) . '-----END ENCRYPTED PRIVATE KEY-----';
} else {
$RSAPrivateKey = "-----BEGIN PRIVATE KEY-----\r\n" . chunk_split(base64_encode($RSAPrivateKey), 64) . '-----END PRIVATE KEY-----';
}
return $RSAPrivateKey;
}
if (!empty($this->password) || is_string($this->password)) {
$iv = Random::string(8);
$symkey = pack('H*', md5($this->password . $iv));
// symkey is short for symmetric key
$symkey .= substr(pack('H*', md5($symkey . $this->password . $iv)), 0, 8);
$des = new TripleDES();
$des->setKey($symkey);
$des->setIV($iv);
$iv = strtoupper(bin2hex($iv));
$RSAPrivateKey = "-----BEGIN RSA PRIVATE KEY-----\r\n" . "Proc-Type: 4,ENCRYPTED\r\n" . "DEK-Info: DES-EDE3-CBC,{$iv}\r\n" . "\r\n" . chunk_split(base64_encode($des->encrypt($RSAPrivateKey)), 64) . '-----END RSA PRIVATE KEY-----';
} else {
$RSAPrivateKey = "-----BEGIN RSA PRIVATE KEY-----\r\n" . chunk_split(base64_encode($RSAPrivateKey), 64) . '-----END RSA PRIVATE KEY-----';
}
return $RSAPrivateKey;
}
}
/**
* Sets the password.
*
* Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2} or pbkdf1:
* $hash, $salt, $count, $dkLen
*
* Where $hash (default = sha1) currently supports the following hashes: see: Crypt/Hash.php
*
* @see Crypt/Hash.php
*
* @param String $password
* @param optional String $method
*
* @return Boolean
* @access public
* @internal Could, but not must, extend by the child Crypt_* class
*/
function setPassword($password, $method = 'pbkdf2')
{
$key = '';
switch ($method) {
default:
// 'pbkdf2' or 'pbkdf1'
$func_args = func_get_args();
// Hash function
$hash = isset($func_args[2]) ? $func_args[2] : 'sha1';
// WPA and WPA2 use the SSID as the salt
$salt = isset($func_args[3]) ? $func_args[3] : $this->password_default_salt;
// RFC2898#section-4.2 uses 1,000 iterations by default
// WPA and WPA2 use 4,096.
$count = isset($func_args[4]) ? $func_args[4] : 1000;
// Keylength
if (isset($func_args[5])) {
$dkLen = $func_args[5];
} else {
$dkLen = $method == 'pbkdf1' ? 2 * $this->password_key_size : $this->password_key_size;
}
switch (true) {
case $method == 'pbkdf1':
$hashObj = new Hash();
$hashObj->setHash($hash);
if ($dkLen > $hashObj->getLength()) {
user_error('Derived key too long');
return false;
}
$t = $password . $salt;
for ($i = 0; $i < $count; ++$i) {
$t = $hashObj->hash($t);
}
$key = substr($t, 0, $dkLen);
$this->setKey(substr($key, 0, $dkLen >> 1));
$this->setIV(substr($key, $dkLen >> 1));
return true;
// Determining if php[>=5.5.0]'s hash_pbkdf2() function avail- and useable
// Determining if php[>=5.5.0]'s hash_pbkdf2() function avail- and useable
case !function_exists('hash_pbkdf2'):
case !function_exists('hash_algos'):
case !in_array($hash, hash_algos()):
$i = 1;
while (strlen($key) < $dkLen) {
$hmac = new Hash();
$hmac->setHash($hash);
$hmac->setKey($password);
$f = $u = $hmac->hash($salt . pack('N', $i++));
for ($j = 2; $j <= $count; ++$j) {
$u = $hmac->hash($u);
$f ^= $u;
}
$key .= $f;
}
$key = substr($key, 0, $dkLen);
break;
default:
$key = hash_pbkdf2($hash, $password, $salt, $count, $dkLen, true);
}
}
$this->setKey($key);
return true;
}
/**
* Sets the password.
*
* Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
* $hash, $salt, $method
* Set $dkLen by calling setKeyLength()
*
* @param String $password
* @param optional String $method
* @access public
*/
function setPassword($password, $method = 'pbkdf2')
{
$key = '';
switch ($method) {
default:
// 'pbkdf2'
list(, , $hash, $salt, $count) = func_get_args();
if (!isset($hash)) {
$hash = 'sha1';
}
// WPA and WPA2 use the SSID as the salt
if (!isset($salt)) {
$salt = 'phpseclib';
}
// RFC2898#section-4.2 uses 1,000 iterations by default
// WPA and WPA2 use 4,096.
if (!isset($count)) {
$count = 1000;
}
$i = 1;
while (strlen($key) < $this->key_size) {
// $dkLen == $this->key_size
//$dk.= $this->_pbkdf($password, $salt, $count, $i++);
$hmac = new Hash();
$hmac->setHash($hash);
$hmac->setKey($password);
$f = $u = $hmac->hash($salt . pack('N', $i++));
for ($j = 2; $j <= $count; $j++) {
$u = $hmac->hash($u);
$f ^= $u;
}
$key .= $f;
}
}
$this->setKey(substr($key, 0, $this->key_size));
}
/**
* Sets the password.
*
* Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
* $hash, $salt, $method
*
* @param String $password
* @param optional String $method
* @access public
*/
function setPassword($password, $method = 'pbkdf2')
{
$key = '';
switch ($method) {
default:
// 'pbkdf2'
list(, , $hash, $salt, $count) = func_get_args();
if (!isset($hash)) {
$hash = 'sha1';
}
// WPA and WPA2 use the SSID as the salt
if (!isset($salt)) {
$salt = 'phpseclib';
}
// RFC2898#section-4.2 uses 1,000 iterations by default
// WPA and WPA2 use 4,096.
if (!isset($count)) {
$count = 1000;
}
if (!class_exists('Crypt_Hash')) {
require_once 'Crypt/Hash.php';
}
$i = 1;
while (strlen($key) < 24) {
// $dkLen == 24
$hmac = new Hash();
$hmac->setHash($hash);
$hmac->setKey($password);
$f = $u = $hmac->hash($salt . pack('N', $i++));
for ($j = 2; $j <= $count; $j++) {
$u = $hmac->hash($u);
$f ^= $u;
}
$key .= $f;
}
}
$this->setKey($key);
}
<?php
include '../phpseclib/phpseclib/Crypt/Hash.php';
include 'Hash.php';
$text_to_hash = 'This is something secret';
$key = 'IVxSISQCUnFoEfPU';
echo 'Text to hash: ' . $text_to_hash . "\r\n";
echo 'MAC key: ' . $key . "\r\n";
$hashes_array = hash_algos();
foreach ($hashes_array as $hash_element) {
$hash = new Hash($hash_element);
echo $hash_element . ': ' . $hash->hash($text_to_hash) . "\r\n";
echo $hash_element . ' MAC: ';
$hash->setKey($key);
echo $hash->hash($text_to_hash) . "\r\n";
}
/**
* Sets the password.
*
* Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
* $hash, $salt, $count, $dkLen
*
* Where $hash (default = sha1) currently supports the following hashes: see: Crypt/Hash.php
*
* Note: Could, but not must, extend by the child * class
*
* @see Crypt/Hash.php
* @param String $password
* @param optional String $method
* @access public
*/
function setPassword($password, $method = 'pbkdf2')
{
$key = '';
switch ($method) {
default:
// 'pbkdf2'
$func_args = func_get_args();
// Hash function
$hash = isset($func_args[2]) ? $func_args[2] : 'sha1';
// WPA and WPA2 use the SSID as the salt
$salt = isset($func_args[3]) ? $func_args[3] : $this->password_default_salt;
// RFC2898#section-4.2 uses 1,000 iterations by default
// WPA and WPA2 use 4,096.
$count = isset($func_args[4]) ? $func_args[4] : 1000;
// Keylength
$dkLen = isset($func_args[5]) ? $func_args[5] : $this->password_key_size;
// Determining if php[>=5.5.0]'s hash_pbkdf2() function avail- and useable
switch (true) {
case !function_exists('hash_pbkdf2'):
case !function_exists('hash_algos'):
case !in_array($hash, hash_algos()):
$i = 1;
while (strlen($key) < $dkLen) {
$hmac = new Hash();
$hmac->setHash($hash);
$hmac->setKey($password);
$f = $u = $hmac->_hash($salt . pack('N', $i++));
for ($j = 2; $j <= $count; ++$j) {
$u = $hmac->_hash($u);
$f ^= $u;
}
$key .= $f;
}
$key = substr($key, 0, $dkLen);
break;
default:
$key = hash_pbkdf2($hash, $password, $salt, $count, $dkLen, true);
}
}
$this->setKey($key);
}
