diff options
Diffstat (limited to 'Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/TripleDES.php')
| -rw-r--r-- | Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/TripleDES.php | 460 |
1 files changed, 0 insertions, 460 deletions
diff --git a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/TripleDES.php b/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/TripleDES.php deleted file mode 100644 index a2c4166..0000000 --- a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/TripleDES.php +++ /dev/null @@ -1,460 +0,0 @@ -<?php - -/** - * Pure-PHP implementation of Triple DES. - * - * Uses mcrypt, if available, and an internal implementation, otherwise. Operates in the EDE3 mode (encrypt-decrypt-encrypt). - * - * PHP version 5 - * - * Here's a short example of how to use this library: - * <code> - * <?php - * include 'vendor/autoload.php'; - * - * $des = new \phpseclib\Crypt\TripleDES(); - * - * $des->setKey('abcdefghijklmnopqrstuvwx'); - * - * $size = 10 * 1024; - * $plaintext = ''; - * for ($i = 0; $i < $size; $i++) { - * $plaintext.= 'a'; - * } - * - * echo $des->decrypt($des->encrypt($plaintext)); - * ?> - * </code> - * - * @category Crypt - * @package TripleDES - * @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 Triple DES. - * - * @package TripleDES - * @author Jim Wigginton <terrafrost@php.net> - * @access public - */ -class TripleDES extends DES -{ - /** - * Encrypt / decrypt using inner chaining - * - * Inner chaining is used by SSH-1 and is generally considered to be less secure then outer chaining (self::MODE_CBC3). - */ - const MODE_3CBC = -2; - - /** - * Encrypt / decrypt using outer chaining - * - * Outer chaining is used by SSH-2 and when the mode is set to \phpseclib\Crypt\Base::MODE_CBC. - */ - const MODE_CBC3 = Base::MODE_CBC; - - /** - * Key Length (in bytes) - * - * @see \phpseclib\Crypt\TripleDES::setKeyLength() - * @var int - * @access private - */ - var $key_length = 24; - - /** - * The default salt used by setPassword() - * - * @see \phpseclib\Crypt\Base::password_default_salt - * @see \phpseclib\Crypt\Base::setPassword() - * @var string - * @access private - */ - var $password_default_salt = 'phpseclib'; - - /** - * The mcrypt specific name of the cipher - * - * @see \phpseclib\Crypt\DES::cipher_name_mcrypt - * @see \phpseclib\Crypt\Base::cipher_name_mcrypt - * @var string - * @access private - */ - var $cipher_name_mcrypt = 'tripledes'; - - /** - * Optimizing value while CFB-encrypting - * - * @see \phpseclib\Crypt\Base::cfb_init_len - * @var int - * @access private - */ - var $cfb_init_len = 750; - - /** - * max possible size of $key - * - * @see self::setKey() - * @see \phpseclib\Crypt\DES::setKey() - * @var string - * @access private - */ - var $key_length_max = 24; - - /** - * Internal flag whether using self::MODE_3CBC or not - * - * @var bool - * @access private - */ - var $mode_3cbc; - - /** - * The \phpseclib\Crypt\DES objects - * - * Used only if $mode_3cbc === true - * - * @var array - * @access private - */ - var $des; - - /** - * Default Constructor. - * - * Determines whether or not the mcrypt extension should be used. - * - * $mode could be: - * - * - \phpseclib\Crypt\Base::MODE_ECB - * - * - \phpseclib\Crypt\Base::MODE_CBC - * - * - \phpseclib\Crypt\Base::MODE_CTR - * - * - \phpseclib\Crypt\Base::MODE_CFB - * - * - \phpseclib\Crypt\Base::MODE_OFB - * - * - \phpseclib\Crypt\TripleDES::MODE_3CBC - * - * If not explicitly set, \phpseclib\Crypt\Base::MODE_CBC will be used. - * - * @see \phpseclib\Crypt\DES::__construct() - * @see \phpseclib\Crypt\Base::__construct() - * @param int $mode - * @access public - */ - function __construct($mode = Base::MODE_CBC) - { - switch ($mode) { - // In case of self::MODE_3CBC, we init as CRYPT_DES_MODE_CBC - // and additional flag us internally as 3CBC - case self::MODE_3CBC: - parent::__construct(Base::MODE_CBC); - $this->mode_3cbc = true; - - // This three $des'es will do the 3CBC work (if $key > 64bits) - $this->des = array( - new DES(Base::MODE_CBC), - new DES(Base::MODE_CBC), - new DES(Base::MODE_CBC), - ); - - // we're going to be doing the padding, ourselves, so disable it in the \phpseclib\Crypt\DES objects - $this->des[0]->disablePadding(); - $this->des[1]->disablePadding(); - $this->des[2]->disablePadding(); - break; - // If not 3CBC, we init as usual - default: - parent::__construct($mode); - } - } - - /** - * 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 == self::ENGINE_OPENSSL) { - $this->cipher_name_openssl_ecb = 'des-ede3'; - $mode = $this->_openssl_translate_mode(); - $this->cipher_name_openssl = $mode == 'ecb' ? 'des-ede3' : 'des-ede3-' . $mode; - } - - return parent::isValidEngine($engine); - } - - /** - * Sets the initialization vector. (optional) - * - * SetIV is not required when \phpseclib\Crypt\Base::MODE_ECB is being used. If not explicitly set, it'll be assumed - * to be all zero's. - * - * @see \phpseclib\Crypt\Base::setIV() - * @access public - * @param string $iv - */ - function setIV($iv) - { - parent::setIV($iv); - if ($this->mode_3cbc) { - $this->des[0]->setIV($iv); - $this->des[1]->setIV($iv); - $this->des[2]->setIV($iv); - } - } - - /** - * Sets the key length. - * - * Valid key lengths are 64, 128 and 192 - * - * @see \phpseclib\Crypt\Base:setKeyLength() - * @access public - * @param int $length - */ - function setKeyLength($length) - { - $length >>= 3; - switch (true) { - case $length <= 8: - $this->key_length = 8; - break; - case $length <= 16: - $this->key_length = 16; - break; - default: - $this->key_length = 24; - } - - parent::setKeyLength($length); - } - - /** - * Sets the key. - * - * Keys can be of any length. Triple DES, itself, can use 128-bit (eg. strlen($key) == 16) or - * 192-bit (eg. strlen($key) == 24) keys. This function pads and truncates $key as appropriate. - * - * DES also requires that every eighth bit be a parity bit, however, we'll ignore that. - * - * If the key is not explicitly set, it'll be assumed to be all null bytes. - * - * @access public - * @see \phpseclib\Crypt\DES::setKey() - * @see \phpseclib\Crypt\Base::setKey() - * @param string $key - */ - function setKey($key) - { - $length = $this->explicit_key_length ? $this->key_length : strlen($key); - if ($length > 8) { - $key = str_pad(substr($key, 0, 24), 24, chr(0)); - // if $key is between 64 and 128-bits, use the first 64-bits as the last, per this: - // http://php.net/function.mcrypt-encrypt#47973 - $key = $length <= 16 ? substr_replace($key, substr($key, 0, 8), 16) : substr($key, 0, 24); - } else { - $key = str_pad($key, 8, chr(0)); - } - parent::setKey($key); - - // And in case of self::MODE_3CBC: - // if key <= 64bits we not need the 3 $des to work, - // because we will then act as regular DES-CBC with just a <= 64bit key. - // So only if the key > 64bits (> 8 bytes) we will call setKey() for the 3 $des. - if ($this->mode_3cbc && $length > 8) { - $this->des[0]->setKey(substr($key, 0, 8)); - $this->des[1]->setKey(substr($key, 8, 8)); - $this->des[2]->setKey(substr($key, 16, 8)); - } - } - - /** - * Encrypts a message. - * - * @see \phpseclib\Crypt\Base::encrypt() - * @access public - * @param string $plaintext - * @return string $cipertext - */ - function encrypt($plaintext) - { - // parent::en/decrypt() is able to do all the work for all modes and keylengths, - // except for: self::MODE_3CBC (inner chaining CBC) with a key > 64bits - - // if the key is smaller then 8, do what we'd normally do - if ($this->mode_3cbc && strlen($this->key) > 8) { - return $this->des[2]->encrypt( - $this->des[1]->decrypt( - $this->des[0]->encrypt( - $this->_pad($plaintext) - ) - ) - ); - } - - return parent::encrypt($plaintext); - } - - /** - * Decrypts a message. - * - * @see \phpseclib\Crypt\Base::decrypt() - * @access public - * @param string $ciphertext - * @return string $plaintext - */ - function decrypt($ciphertext) - { - if ($this->mode_3cbc && strlen($this->key) > 8) { - return $this->_unpad( - $this->des[0]->decrypt( - $this->des[1]->encrypt( - $this->des[2]->decrypt( - str_pad($ciphertext, (strlen($ciphertext) + 7) & 0xFFFFFFF8, "\0") - ) - ) - ) - ); - } - - return parent::decrypt($ciphertext); - } - - /** - * Treat consecutive "packets" as if they are a continuous buffer. - * - * Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets - * will yield different outputs: - * - * <code> - * echo $des->encrypt(substr($plaintext, 0, 8)); - * echo $des->encrypt(substr($plaintext, 8, 8)); - * </code> - * <code> - * echo $des->encrypt($plaintext); - * </code> - * - * The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates - * another, as demonstrated with the following: - * - * <code> - * $des->encrypt(substr($plaintext, 0, 8)); - * echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8))); - * </code> - * <code> - * echo $des->decrypt($des->encrypt(substr($plaintext, 8, 8))); - * </code> - * - * With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different - * outputs. The reason is due to the fact that the initialization vector's change after every encryption / - * decryption round when the continuous buffer is enabled. When it's disabled, they remain constant. - * - * Put another way, when the continuous buffer is enabled, the state of the \phpseclib\Crypt\DES() object changes after each - * encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that - * continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them), - * however, they are also less intuitive and more likely to cause you problems. - * - * @see \phpseclib\Crypt\Base::enableContinuousBuffer() - * @see self::disableContinuousBuffer() - * @access public - */ - function enableContinuousBuffer() - { - parent::enableContinuousBuffer(); - if ($this->mode_3cbc) { - $this->des[0]->enableContinuousBuffer(); - $this->des[1]->enableContinuousBuffer(); - $this->des[2]->enableContinuousBuffer(); - } - } - - /** - * Treat consecutive packets as if they are a discontinuous buffer. - * - * The default behavior. - * - * @see \phpseclib\Crypt\Base::disableContinuousBuffer() - * @see self::enableContinuousBuffer() - * @access public - */ - function disableContinuousBuffer() - { - parent::disableContinuousBuffer(); - if ($this->mode_3cbc) { - $this->des[0]->disableContinuousBuffer(); - $this->des[1]->disableContinuousBuffer(); - $this->des[2]->disableContinuousBuffer(); - } - } - - /** - * Creates the key schedule - * - * @see \phpseclib\Crypt\DES::_setupKey() - * @see \phpseclib\Crypt\Base::_setupKey() - * @access private - */ - function _setupKey() - { - switch (true) { - // if $key <= 64bits we configure our internal pure-php cipher engine - // to act as regular [1]DES, not as 3DES. mcrypt.so::tripledes does the same. - case strlen($this->key) <= 8: - $this->des_rounds = 1; - break; - - // otherwise, if $key > 64bits, we configure our engine to work as 3DES. - default: - $this->des_rounds = 3; - - // (only) if 3CBC is used we have, of course, to setup the $des[0-2] keys also separately. - if ($this->mode_3cbc) { - $this->des[0]->_setupKey(); - $this->des[1]->_setupKey(); - $this->des[2]->_setupKey(); - - // because $des[0-2] will, now, do all the work we can return here - // not need unnecessary stress parent::_setupKey() with our, now unused, $key. - return; - } - } - // setup our key - parent::_setupKey(); - } - - /** - * Sets the internal crypt engine - * - * @see \phpseclib\Crypt\Base::__construct() - * @see \phpseclib\Crypt\Base::setPreferredEngine() - * @param int $engine - * @access public - * @return int - */ - function setPreferredEngine($engine) - { - if ($this->mode_3cbc) { - $this->des[0]->setPreferredEngine($engine); - $this->des[1]->setPreferredEngine($engine); - $this->des[2]->setPreferredEngine($engine); - } - - return parent::setPreferredEngine($engine); - } -} |