diff options
Diffstat (limited to 'Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/RC4.php')
| -rw-r--r-- | Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/RC4.php | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/RC4.php b/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/RC4.php deleted file mode 100644 index 25e4ff8..0000000 --- a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/RC4.php +++ /dev/null @@ -1,342 +0,0 @@ -<?php - -/** - * Pure-PHP implementation of RC4. - * - * Uses mcrypt, if available, and an internal implementation, otherwise. - * - * PHP version 5 - * - * Useful resources are as follows: - * - * - {@link http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt ARCFOUR Algorithm} - * - {@link http://en.wikipedia.org/wiki/RC4 - Wikipedia: RC4} - * - * RC4 is also known as ARCFOUR or ARC4. The reason is elaborated upon at Wikipedia. This class is named RC4 and not - * ARCFOUR or ARC4 because RC4 is how it is referred to in the SSH1 specification. - * - * Here's a short example of how to use this library: - * <code> - * <?php - * include 'vendor/autoload.php'; - * - * $rc4 = new \phpseclib\Crypt\RC4(); - * - * $rc4->setKey('abcdefgh'); - * - * $size = 10 * 1024; - * $plaintext = ''; - * for ($i = 0; $i < $size; $i++) { - * $plaintext.= 'a'; - * } - * - * echo $rc4->decrypt($rc4->encrypt($plaintext)); - * ?> - * </code> - * - * @category Crypt - * @package RC4 - * @author Jim Wigginton <terrafrost@php.net> - * @copyright 2007 Jim Wigginton - * @license http://www.opensource.org/licenses/mit-license.html MIT License - * @link http://phpseclib.sourceforge.net - */ - -namespace phpseclib\Crypt; - -/** - * Pure-PHP implementation of RC4. - * - * @package RC4 - * @author Jim Wigginton <terrafrost@php.net> - * @access public - */ -class RC4 extends Base -{ - /**#@+ - * @access private - * @see \phpseclib\Crypt\RC4::_crypt() - */ - const ENCRYPT = 0; - const DECRYPT = 1; - /**#@-*/ - - /** - * Block Length of the cipher - * - * RC4 is a stream cipher - * so we the block_size to 0 - * - * @see \phpseclib\Crypt\Base::block_size - * @var int - * @access private - */ - var $block_size = 0; - - /** - * Key Length (in bytes) - * - * @see \phpseclib\Crypt\RC4::setKeyLength() - * @var int - * @access private - */ - var $key_length = 128; // = 1024 bits - - /** - * The mcrypt specific name of the cipher - * - * @see \phpseclib\Crypt\Base::cipher_name_mcrypt - * @var string - * @access private - */ - var $cipher_name_mcrypt = 'arcfour'; - - /** - * Holds whether performance-optimized $inline_crypt() can/should be used. - * - * @see \phpseclib\Crypt\Base::inline_crypt - * @var mixed - * @access private - */ - var $use_inline_crypt = false; // currently not available - - /** - * The Key - * - * @see self::setKey() - * @var string - * @access private - */ - var $key; - - /** - * The Key Stream for decryption and encryption - * - * @see self::setKey() - * @var array - * @access private - */ - var $stream; - - /** - * Default Constructor. - * - * Determines whether or not the mcrypt extension should be used. - * - * @see \phpseclib\Crypt\Base::__construct() - * @return \phpseclib\Crypt\RC4 - * @access public - */ - function __construct() - { - parent::__construct(Base::MODE_STREAM); - } - - /** - * Test for engine validity - * - * This is mainly just a wrapper to set things up for \phpseclib\Crypt\Base::isValidEngine() - * - * @see \phpseclib\Crypt\Base::__construct() - * @param int $engine - * @access public - * @return bool - */ - function isValidEngine($engine) - { - if ($engine == Base::ENGINE_OPENSSL) { - if (version_compare(PHP_VERSION, '5.3.7') >= 0) { - $this->cipher_name_openssl = 'rc4-40'; - } else { - switch (strlen($this->key)) { - case 5: - $this->cipher_name_openssl = 'rc4-40'; - break; - case 8: - $this->cipher_name_openssl = 'rc4-64'; - break; - case 16: - $this->cipher_name_openssl = 'rc4'; - break; - default: - return false; - } - } - } - - return parent::isValidEngine($engine); - } - - /** - * Dummy function. - * - * Some protocols, such as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1]. - * If you need to use an initialization vector in this manner, feel free to prepend it to the key, yourself, before - * calling setKey(). - * - * [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol, - * the IV's are relatively easy to predict, an attack described by - * {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir} - * can be used to quickly guess at the rest of the key. The following links elaborate: - * - * {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009} - * {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack} - * - * @param string $iv - * @see self::setKey() - * @access public - */ - function setIV($iv) - { - } - - /** - * Sets the key length - * - * Keys can be between 1 and 256 bytes long. - * - * @access public - * @param int $length - */ - function setKeyLength($length) - { - if ($length < 8) { - $this->key_length = 1; - } elseif ($length > 2048) { - $this->key_length = 256; - } else { - $this->key_length = $length >> 3; - } - - parent::setKeyLength($length); - } - - /** - * Encrypts a message. - * - * @see \phpseclib\Crypt\Base::decrypt() - * @see self::_crypt() - * @access public - * @param string $plaintext - * @return string $ciphertext - */ - function encrypt($plaintext) - { - if ($this->engine != Base::ENGINE_INTERNAL) { - return parent::encrypt($plaintext); - } - return $this->_crypt($plaintext, self::ENCRYPT); - } - - /** - * Decrypts a message. - * - * $this->decrypt($this->encrypt($plaintext)) == $this->encrypt($this->encrypt($plaintext)). - * At least if the continuous buffer is disabled. - * - * @see \phpseclib\Crypt\Base::encrypt() - * @see self::_crypt() - * @access public - * @param string $ciphertext - * @return string $plaintext - */ - function decrypt($ciphertext) - { - if ($this->engine != Base::ENGINE_INTERNAL) { - return parent::decrypt($ciphertext); - } - return $this->_crypt($ciphertext, self::DECRYPT); - } - - /** - * Encrypts a block - * - * @access private - * @param string $in - */ - function _encryptBlock($in) - { - // RC4 does not utilize this method - } - - /** - * Decrypts a block - * - * @access private - * @param string $in - */ - function _decryptBlock($in) - { - // RC4 does not utilize this method - } - - /** - * Setup the key (expansion) - * - * @see \phpseclib\Crypt\Base::_setupKey() - * @access private - */ - function _setupKey() - { - $key = $this->key; - $keyLength = strlen($key); - $keyStream = range(0, 255); - $j = 0; - for ($i = 0; $i < 256; $i++) { - $j = ($j + $keyStream[$i] + ord($key[$i % $keyLength])) & 255; - $temp = $keyStream[$i]; - $keyStream[$i] = $keyStream[$j]; - $keyStream[$j] = $temp; - } - - $this->stream = array(); - $this->stream[self::DECRYPT] = $this->stream[self::ENCRYPT] = array( - 0, // index $i - 0, // index $j - $keyStream - ); - } - - /** - * Encrypts or decrypts a message. - * - * @see self::encrypt() - * @see self::decrypt() - * @access private - * @param string $text - * @param int $mode - * @return string $text - */ - function _crypt($text, $mode) - { - if ($this->changed) { - $this->_setup(); - $this->changed = false; - } - - $stream = &$this->stream[$mode]; - if ($this->continuousBuffer) { - $i = &$stream[0]; - $j = &$stream[1]; - $keyStream = &$stream[2]; - } else { - $i = $stream[0]; - $j = $stream[1]; - $keyStream = $stream[2]; - } - - $len = strlen($text); - for ($k = 0; $k < $len; ++$k) { - $i = ($i + 1) & 255; - $ksi = $keyStream[$i]; - $j = ($j + $ksi) & 255; - $ksj = $keyStream[$j]; - - $keyStream[$i] = $ksj; - $keyStream[$j] = $ksi; - $text[$k] = $text[$k] ^ chr($keyStream[($ksj + $ksi) & 255]); - } - - return $text; - } -} |