/**
* Decrypt a string.
*
* @param string $text The content for the decryption.
*
* @return string The decrypted string
*/
public function Decrypt($text)
{
$text = $this->splitText($text);
// Set the iv.
$this->aes->setIV($text[0]);
// Decrypt.
return $this->aes->decrypt($text[1]);
}
public static function decrypt($data, $k, $iv)
{
$aes = new AES(MCRYPT_MODE_CBC);
$aes->setKey($k);
$aes->setIV($iv);
return $aes->decrypt($data);
}
public static function decrypt($data)
{
$aes = new AES(AES::MODE_ECB);
$aes->setKey(self::$key);
$data = pack("H*", $data);
$data = $aes->decrypt($data);
return $data;
}
/**
* @return mixed
*/
public function decrypt($text, $key, $options = array())
{
$processed_text = '';
$disable_base64 = array_key_exists('base64', $options) && $options['base64'] == FALSE;
// If base64 encoding is not disabled.
if (!$disable_base64) {
$text = base64_decode($text);
}
$aes = new AES();
$aes->setKey($key);
$processed_text = $aes->decrypt($text);
return trim($processed_text);
}
/**
* Process the launchkey option to prepare for usage within the plugin. The option will have encrypted attributes
* decrypted as well as set default values for any missing or unset attributes.
*
* @since 1.0.0
*
* @param $input
*
* @return array
*/
public function post_get_option_filter($input)
{
// Define the defaults for attributes
$defaults = static::get_defaults();
// If the input is empty (null) set it to an empty array
$input ?: array();
// Merge the input array over the defaults array to set any know data to the response
$output = array_merge($defaults, $input);
// If the secret key attribute is not empty, decrypt it
if (!empty($input[LaunchKey_WP_Options::OPTION_SECRET_KEY])) {
$key = md5($input[LaunchKey_WP_Options::OPTION_SECRET_KEY]);
if (empty($this->cache[$key])) {
/**
* Use the rocket key as the IV. If null, use the static value.
* @link https://docs.launchkey.com/glossary.html#term-iv
*/
$iv = empty($output[LaunchKey_WP_Options::OPTION_ROCKET_KEY]) ? static::STATIC_IV : $output[LaunchKey_WP_Options::OPTION_ROCKET_KEY];
$this->crypt_aes->setIV($iv);
/**
* Decrypt the Base64 decoded string and set it as the output value
* @link https://docs.launchkey.com/glossary.html#term-base64
*/
$this->cache[$key] = $this->crypt_aes->decrypt(base64_decode($input[LaunchKey_WP_Options::OPTION_SECRET_KEY]));
}
$output[LaunchKey_WP_Options::OPTION_SECRET_KEY] = $this->cache[$key];
}
// If the private key attribute is not empty, decrypt it
if (!empty($input[LaunchKey_WP_Options::OPTION_PRIVATE_KEY])) {
$key = md5($input[LaunchKey_WP_Options::OPTION_PRIVATE_KEY]);
if (empty($this->cache[$key])) {
/**
* Use the decrypted secret key as the IV. If null, use the static value.
* @link https://docs.launchkey.com/glossary.html#term-iv
*/
$iv = empty($output[LaunchKey_WP_Options::OPTION_SECRET_KEY]) ? static::STATIC_IV : $output[LaunchKey_WP_Options::OPTION_SECRET_KEY];
$this->crypt_aes->setIV($iv);
/**
* Decrypt the Base64 decoded string and set it as the output value
* @link https://docs.launchkey.com/glossary.html#term-base64
*
* We are suppressing errors as
*/
$this->cache[$key] = @$this->crypt_aes->decrypt(base64_decode($input[LaunchKey_WP_Options::OPTION_PRIVATE_KEY]));
}
$output[LaunchKey_WP_Options::OPTION_PRIVATE_KEY] = $this->cache[$key];
}
return $output;
}
/**
* Decrypts a value and verifies the HMAC (Encrypt-Then-Mac)
* @param string $authenticatedCiphertext
* @param string $password Password to encrypt, if not specified the secret from config.php will be taken
* @return string plaintext
* @throws \Exception If the HMAC does not match
*/
public function decrypt($authenticatedCiphertext, $password = '')
{
if ($password === '') {
$password = $this->config->getSystemValue('secret');
}
$this->cipher->setPassword($password);
$parts = explode('|', $authenticatedCiphertext);
if (sizeof($parts) !== 3) {
throw new \Exception('Authenticated ciphertext could not be decoded.');
}
$ciphertext = hex2bin($parts[0]);
$iv = $parts[1];
$hmac = hex2bin($parts[2]);
$this->cipher->setIV($iv);
if (!hash_equals($this->calculateHMAC($parts[0] . $parts[1], $password), $hmac)) {
throw new \Exception('HMAC does not match.');
}
return $this->cipher->decrypt($ciphertext);
}
/**
* Decryption using openssl's AES or phpseclib's AES
* (phpseclib uses mcrypt when it is available)
*
* @param string $encdata encrypted data
* @param string $secret the secret
*
* @return string original data
*/
public function cookieDecrypt($encdata, $secret)
{
if (is_null($this->_cookie_iv)) {
$this->_cookie_iv = base64_decode($_COOKIE['pma_iv-' . $GLOBALS['server']], true);
}
if (mb_strlen($this->_cookie_iv, '8bit') < $this->getIVSize()) {
$this->createIV();
}
if (self::useOpenSSL()) {
return openssl_decrypt($encdata, 'AES-128-CBC', $secret, 0, $this->_cookie_iv);
} else {
$cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
$cipher->setIV($this->_cookie_iv);
$cipher->setKey($secret);
return $cipher->decrypt(base64_decode($encdata));
}
}
/**
* Break a public or private key down into its constituent components
*
* @access public
* @param string $key
* @param string $password optional
* @return array
*/
static function load($key, $password = '')
{
if (!is_string($key)) {
return false;
}
static $one;
if (!isset($one)) {
$one = new BigInteger(1);
}
if (strpos($key, 'BEGIN SSH2 PUBLIC KEY')) {
$data = preg_split('#[\\r\\n]+#', $key);
$data = array_splice($data, 2, -1);
$data = implode('', $data);
$components = OpenSSH::load($data);
if ($components === false) {
return false;
}
if (!preg_match('#Comment: "(.+)"#', $key, $matches)) {
return false;
}
$components['comment'] = str_replace(array('\\\\', '\\"'), array('\\', '"'), $matches[1]);
return $components;
}
$components = array('isPublicKey' => false);
$key = preg_split('#\\r\\n|\\r|\\n#', $key);
$type = trim(preg_replace('#PuTTY-User-Key-File-2: (.+)#', '$1', $key[0]));
if ($type != 'ssh-rsa') {
return false;
}
$encryption = trim(preg_replace('#Encryption: (.+)#', '$1', $key[1]));
$components['comment'] = trim(preg_replace('#Comment: (.+)#', '$1', $key[2]));
$publicLength = trim(preg_replace('#Public-Lines: (\\d+)#', '$1', $key[3]));
$public = Base64::decode(implode('', array_map('trim', array_slice($key, 4, $publicLength))));
$public = substr($public, 11);
extract(unpack('Nlength', Strings::shift($public, 4)));
$components['publicExponent'] = new BigInteger(Strings::shift($public, $length), -256);
extract(unpack('Nlength', Strings::shift($public, 4)));
$components['modulus'] = new BigInteger(Strings::shift($public, $length), -256);
$privateLength = trim(preg_replace('#Private-Lines: (\\d+)#', '$1', $key[$publicLength + 4]));
$private = Base64::decode(implode('', array_map('trim', array_slice($key, $publicLength + 5, $privateLength))));
switch ($encryption) {
case 'aes256-cbc':
$symkey = static::generateSymmetricKey($password, 32);
$crypto = new AES(AES::MODE_CBC);
}
if ($encryption != 'none') {
$crypto->setKey($symkey);
$crypto->setIV(str_repeat("", $crypto->getBlockLength() >> 3));
$crypto->disablePadding();
$private = $crypto->decrypt($private);
}
extract(unpack('Nlength', Strings::shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['privateExponent'] = new BigInteger(Strings::shift($private, $length), -256);
extract(unpack('Nlength', Strings::shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['primes'] = array(1 => new BigInteger(Strings::shift($private, $length), -256));
extract(unpack('Nlength', Strings::shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['primes'][] = new BigInteger(Strings::shift($private, $length), -256);
$temp = $components['primes'][1]->subtract($one);
$components['exponents'] = array(1 => $components['publicExponent']->modInverse($temp));
$temp = $components['primes'][2]->subtract($one);
$components['exponents'][] = $components['publicExponent']->modInverse($temp);
extract(unpack('Nlength', Strings::shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['coefficients'] = array(2 => new BigInteger(Strings::shift($private, $length), -256));
return $components;
}
/**
* Break a public or private key down into its constituant components
*
* @access private
* @see _convertPublicKey()
* @see _convertPrivateKey()
* @param String $key
* @param Integer $type
* @return Array
*/
function _parseKey($key, $type)
{
if ($type != CRYPT_RSA_PUBLIC_FORMAT_RAW && !is_string($key)) {
return false;
}
switch ($type) {
case CRYPT_RSA_PUBLIC_FORMAT_RAW:
if (!is_array($key)) {
return false;
}
$components = array();
switch (true) {
case isset($key['e']):
$components['publicExponent'] = $key['e']->copy();
break;
case isset($key['exponent']):
$components['publicExponent'] = $key['exponent']->copy();
break;
case isset($key['publicExponent']):
$components['publicExponent'] = $key['publicExponent']->copy();
break;
case isset($key[0]):
$components['publicExponent'] = $key[0]->copy();
}
switch (true) {
case isset($key['n']):
$components['modulus'] = $key['n']->copy();
break;
case isset($key['modulo']):
$components['modulus'] = $key['modulo']->copy();
break;
case isset($key['modulus']):
$components['modulus'] = $key['modulus']->copy();
break;
case isset($key[1]):
$components['modulus'] = $key[1]->copy();
}
return isset($components['modulus']) && isset($components['publicExponent']) ? $components : false;
case CRYPT_RSA_PRIVATE_FORMAT_PKCS1:
case CRYPT_RSA_PUBLIC_FORMAT_PKCS1:
/* Although PKCS#1 proposes a format that public and private keys can use, encrypting them is
"outside the scope" of PKCS#1. PKCS#1 then refers you to PKCS#12 and PKCS#15 if you're wanting to
protect private keys, however, that's not what OpenSSL* does. OpenSSL protects private keys by adding
two new "fields" to the key - DEK-Info and Proc-Type. These fields are discussed here:
http://tools.ietf.org/html/rfc1421#section-4.6.1.1
http://tools.ietf.org/html/rfc1421#section-4.6.1.3
DES-EDE3-CBC as an algorithm, however, is not discussed anywhere, near as I can tell.
DES-CBC and DES-EDE are discussed in RFC1423, however, DES-EDE3-CBC isn't, nor is its key derivation
function. As is, the definitive authority on this encoding scheme isn't the IETF but rather OpenSSL's
own implementation. ie. the implementation *is* the standard and any bugs that may exist in that
implementation are part of the standard, as well.
* OpenSSL is the de facto standard. It's utilized by OpenSSH and other projects */
if (preg_match('#DEK-Info: (.+),(.+)#', $key, $matches)) {
$iv = pack('H*', trim($matches[2]));
$symkey = pack('H*', md5($this->password . substr($iv, 0, 8)));
// symkey is short for symmetric key
$symkey .= pack('H*', md5($symkey . $this->password . substr($iv, 0, 8)));
// remove the Proc-Type / DEK-Info sections as they're no longer needed
$key = preg_replace('#^(?:Proc-Type|DEK-Info): .*#m', '', $key);
$ciphertext = $this->_extractBER($key);
if ($ciphertext === false) {
$ciphertext = $key;
}
switch ($matches[1]) {
case 'AES-256-CBC':
$crypto = new AES();
break;
case 'AES-128-CBC':
$symkey = substr($symkey, 0, 16);
$crypto = new AES();
break;
case 'DES-EDE3-CFB':
$crypto = new TripleDES(CRYPT_DES_MODE_CFB);
break;
case 'DES-EDE3-CBC':
$symkey = substr($symkey, 0, 24);
$crypto = new TripleDES();
break;
case 'DES-CBC':
$crypto = new DES();
break;
default:
return false;
}
$crypto->setKey($symkey);
$crypto->setIV($iv);
$decoded = $crypto->decrypt($ciphertext);
} else {
$decoded = $this->_extractBER($key);
}
if ($decoded !== false) {
$key = $decoded;
}
$components = array();
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) {
return false;
}
if ($this->_decodeLength($key) != strlen($key)) {
return false;
}
$tag = ord($this->_string_shift($key));
/*
* intended for keys for which OpenSSL's asn1parse returns the following: 0:d=0 hl=4 l= 631 cons: SEQUENCE 4:d=1 hl=2 l= 1 prim: INTEGER :00 7:d=1 hl=2 l= 13 cons: SEQUENCE 9:d=2 hl=2 l= 9 prim: OBJECT :rsaEncryption 20:d=2 hl=2 l= 0 prim: NULL 22:d=1 hl=4 l= 609 prim: OCTET STRING
*/
if ($tag == CRYPT_RSA_ASN1_INTEGER && substr($key, 0, 3) == "0") {
$this->_string_shift($key, 3);
$tag = CRYPT_RSA_ASN1_SEQUENCE;
}
if ($tag == CRYPT_RSA_ASN1_SEQUENCE) {
/*
* intended for keys for which OpenSSL's asn1parse returns the following: 0:d=0 hl=4 l= 290 cons: SEQUENCE 4:d=1 hl=2 l= 13 cons: SEQUENCE 6:d=2 hl=2 l= 9 prim: OBJECT :rsaEncryption 17:d=2 hl=2 l= 0 prim: NULL 19:d=1 hl=4 l= 271 prim: BIT STRING
*/
$this->_string_shift($key, $this->_decodeLength($key));
$tag = ord($this->_string_shift($key));
// skip over the BIT STRING / OCTET STRING tag
$this->_decodeLength($key);
// skip over the BIT STRING / OCTET STRING length
// "The initial octet shall encode, as an unsigned binary integer wtih bit 1 as the least significant bit, the number of
// unused bits in the final subsequent octet. The number shall be in the range zero to seven."
// -- http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf (section 8.6.2.2)
if ($tag == CRYPT_RSA_ASN1_BITSTRING) {
$this->_string_shift($key);
}
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) {
return false;
}
if ($this->_decodeLength($key) != strlen($key)) {
return false;
}
$tag = ord($this->_string_shift($key));
}
if ($tag != CRYPT_RSA_ASN1_INTEGER) {
return false;
}
$length = $this->_decodeLength($key);
$temp = $this->_string_shift($key, $length);
if (strlen($temp) != 1 || ord($temp) > 2) {
$components['modulus'] = new BigInteger($temp, 256);
$this->_string_shift($key);
// skip over CRYPT_RSA_ASN1_INTEGER
$length = $this->_decodeLength($key);
$components[$type == CRYPT_RSA_PUBLIC_FORMAT_PKCS1 ? 'publicExponent' : 'privateExponent'] = new BigInteger($this->_string_shift($key, $length), 256);
return $components;
}
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_INTEGER) {
return false;
}
$length = $this->_decodeLength($key);
$components['modulus'] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['publicExponent'] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['privateExponent'] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['primes'] = array(1 => new BigInteger($this->_string_shift($key, $length), 256));
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['primes'][] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['exponents'] = array(1 => new BigInteger($this->_string_shift($key, $length), 256));
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['exponents'][] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['coefficients'] = array(2 => new BigInteger($this->_string_shift($key, $length), 256));
if (!empty($key)) {
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) {
return false;
}
$this->_decodeLength($key);
while (!empty($key)) {
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) {
return false;
}
$this->_decodeLength($key);
$key = substr($key, 1);
$length = $this->_decodeLength($key);
$components['primes'][] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['exponents'][] = new BigInteger($this->_string_shift($key, $length), 256);
$this->_string_shift($key);
$length = $this->_decodeLength($key);
$components['coefficients'][] = new BigInteger($this->_string_shift($key, $length), 256);
}
}
return $components;
case CRYPT_RSA_PUBLIC_FORMAT_OPENSSH:
$parts = explode(' ', $key, 3);
$key = isset($parts[1]) ? base64_decode($parts[1]) : false;
if ($key === false) {
return false;
}
$comment = isset($parts[2]) ? $parts[2] : false;
$cleanup = substr($key, 0, 11) == "ssh-rsa";
if (strlen($key) <= 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($key, 4)));
$publicExponent = new BigInteger($this->_string_shift($key, $length), -256);
if (strlen($key) <= 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($key, 4)));
$modulus = new BigInteger($this->_string_shift($key, $length), -256);
if ($cleanup && strlen($key)) {
if (strlen($key) <= 4) {
return false;
}
extract(unpack('Nlength', $this->_string_shift($key, 4)));
$realModulus = new BigInteger($this->_string_shift($key, $length), -256);
return strlen($key) ? false : array('modulus' => $realModulus, 'publicExponent' => $modulus, 'comment' => $comment);
} else {
return strlen($key) ? false : array('modulus' => $modulus, 'publicExponent' => $publicExponent, 'comment' => $comment);
}
// http://www.w3.org/TR/xmldsig-core/#sec-RSAKeyValue
// http://en.wikipedia.org/wiki/XML_Signature
// http://www.w3.org/TR/xmldsig-core/#sec-RSAKeyValue
// http://en.wikipedia.org/wiki/XML_Signature
case CRYPT_RSA_PRIVATE_FORMAT_XML:
case CRYPT_RSA_PUBLIC_FORMAT_XML:
$this->components = array();
$xml = xml_parser_create('UTF-8');
xml_set_object($xml, $this);
xml_set_element_handler($xml, '_start_element_handler', '_stop_element_handler');
xml_set_character_data_handler($xml, '_data_handler');
// add <xml></xml> to account for "dangling" tags like <BitStrength>...</BitStrength> that are sometimes added
if (!xml_parse($xml, '<xml>' . $key . '</xml>')) {
return false;
}
return isset($this->components['modulus']) && isset($this->components['publicExponent']) ? $this->components : false;
// from PuTTY's SSHPUBK.C
// from PuTTY's SSHPUBK.C
case CRYPT_RSA_PRIVATE_FORMAT_PUTTY:
$components = array();
$key = preg_split('#\\r\\n|\\r|\\n#', $key);
$type = trim(preg_replace('#PuTTY-User-Key-File-2: (.+)#', '$1', $key[0]));
if ($type != 'ssh-rsa') {
return false;
}
$encryption = trim(preg_replace('#Encryption: (.+)#', '$1', $key[1]));
$comment = trim(preg_replace('#Comment: (.+)#', '$1', $key[2]));
$publicLength = trim(preg_replace('#Public-Lines: (\\d+)#', '$1', $key[3]));
$public = base64_decode(implode('', array_map('trim', array_slice($key, 4, $publicLength))));
$public = substr($public, 11);
extract(unpack('Nlength', $this->_string_shift($public, 4)));
$components['publicExponent'] = new BigInteger($this->_string_shift($public, $length), -256);
extract(unpack('Nlength', $this->_string_shift($public, 4)));
$components['modulus'] = new BigInteger($this->_string_shift($public, $length), -256);
$privateLength = trim(preg_replace('#Private-Lines: (\\d+)#', '$1', $key[$publicLength + 4]));
$private = base64_decode(implode('', array_map('trim', array_slice($key, $publicLength + 5, $privateLength))));
switch ($encryption) {
case 'aes256-cbc':
$symkey = '';
$sequence = 0;
while (strlen($symkey) < 32) {
$temp = pack('Na*', $sequence++, $this->password);
$symkey .= pack('H*', sha1($temp));
}
$symkey = substr($symkey, 0, 32);
$crypto = new AES();
}
if ($encryption != 'none') {
$crypto->setKey($symkey);
$crypto->disablePadding();
$private = $crypto->decrypt($private);
if ($private === false) {
return false;
}
}
extract(unpack('Nlength', $this->_string_shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['privateExponent'] = new BigInteger($this->_string_shift($private, $length), -256);
extract(unpack('Nlength', $this->_string_shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['primes'] = array(1 => new BigInteger($this->_string_shift($private, $length), -256));
extract(unpack('Nlength', $this->_string_shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['primes'][] = new BigInteger($this->_string_shift($private, $length), -256);
$temp = $components['primes'][1]->subtract($this->one);
$components['exponents'] = array(1 => $components['publicExponent']->modInverse($temp));
$temp = $components['primes'][2]->subtract($this->one);
$components['exponents'][] = $components['publicExponent']->modInverse($temp);
extract(unpack('Nlength', $this->_string_shift($private, 4)));
if (strlen($private) < $length) {
return false;
}
$components['coefficients'] = array(2 => new BigInteger($this->_string_shift($private, $length), -256));
return $components;
}
}
/**
* Decryption using openssl's AES or phpseclib's AES
* (phpseclib uses mcrypt when it is available)
*
* @param string $encdata encrypted data
* @param string $secret the secret
*
* @return string|bool original data, false on error
*/
public function cookieDecrypt($encdata, $secret)
{
$data = json_decode($encdata, true);
if (!is_array($data) || !isset($data['mac']) || !isset($data['iv']) || !isset($data['payload']) || !is_string($data['mac']) || !is_string($data['iv']) || !is_string($data['payload'])) {
return false;
}
$mac_secret = $this->getMACSecret($secret);
$aes_secret = $this->getAESSecret($secret);
$newmac = hash_hmac('sha1', $data['iv'] . $data['payload'], $mac_secret);
if (!hash_equals($data['mac'], $newmac)) {
return false;
}
if (self::useOpenSSL()) {
return openssl_decrypt($data['payload'], 'AES-128-CBC', $secret, 0, base64_decode($data['iv']));
} else {
$cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
$cipher->setIV(base64_decode($data['iv']));
$cipher->setKey($aes_secret);
return $cipher->decrypt(base64_decode($data['payload']));
}
}
/**
* @param $encryptedMessage
* @return String
*/
public function decrypt($encryptedMessage)
{
return $this->cipher->decrypt(base64_decode($encryptedMessage));
}
/**
* @inheritDoc
*/
public function decrypt($encryptedValue, $key, $iv)
{
$this->aes->setKey($key);
$this->aes->setIV($iv);
return $this->aes->decrypt($encryptedValue);
}
/**
* @param string $encrypted
*
* @return bool|string
*/
public function decrypt($encrypted)
{
return $this->aes->decrypt(base64_decode($encrypted));
}
