diff options
Diffstat (limited to 'Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/Random.php')
| -rw-r--r-- | Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/Random.php | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/Random.php b/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/Random.php deleted file mode 100644 index 01e34cc..0000000 --- a/Postman/Postman-Mail/google-api-client/vendor/phpseclib/phpseclib/phpseclib/Crypt/Random.php +++ /dev/null @@ -1,274 +0,0 @@ -<?php - -/** - * Random Number Generator - * - * PHP version 5 - * - * Here's a short example of how to use this library: - * <code> - * <?php - * include 'vendor/autoload.php'; - * - * echo bin2hex(\phpseclib\Crypt\Random::string(8)); - * ?> - * </code> - * - * @category Crypt - * @package Random - * @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 Random Number Generator - * - * @package Random - * @author Jim Wigginton <terrafrost@php.net> - * @access public - */ -class Random -{ - /** - * Generate a random string. - * - * Although microoptimizations are generally discouraged as they impair readability this function is ripe with - * microoptimizations because this function has the potential of being called a huge number of times. - * eg. for RSA key generation. - * - * @param int $length - * @return string - */ - static function string($length) - { - if (!$length) { - return ''; - } - - if (version_compare(PHP_VERSION, '7.0.0', '>=')) { - try { - return \random_bytes($length); - } catch (\Throwable $e) { - // If a sufficient source of randomness is unavailable, random_bytes() will throw an - // object that implements the Throwable interface (Exception, TypeError, Error). - // We don't actually need to do anything here. The string() method should just continue - // as normal. Note, however, that if we don't have a sufficient source of randomness for - // random_bytes(), most of the other calls here will fail too, so we'll end up using - // the PHP implementation. - } - } - - if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { - // method 1. prior to PHP 5.3 this would call rand() on windows hence the function_exists('class_alias') call. - // ie. class_alias is a function that was introduced in PHP 5.3 - if (extension_loaded('mcrypt') && function_exists('class_alias')) { - return @mcrypt_create_iv($length); - } - // method 2. openssl_random_pseudo_bytes was introduced in PHP 5.3.0 but prior to PHP 5.3.4 there was, - // to quote <http://php.net/ChangeLog-5.php#5.3.4>, "possible blocking behavior". as of 5.3.4 - // openssl_random_pseudo_bytes and mcrypt_create_iv do the exact same thing on Windows. ie. they both - // call php_win32_get_random_bytes(): - // - // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/openssl/openssl.c#L5008 - // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/mcrypt/mcrypt.c#L1392 - // - // php_win32_get_random_bytes() is defined thusly: - // - // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/win32/winutil.c#L80 - // - // we're calling it, all the same, in the off chance that the mcrypt extension is not available - if (extension_loaded('openssl') && version_compare(PHP_VERSION, '5.3.4', '>=')) { - return openssl_random_pseudo_bytes($length); - } - } else { - // method 1. the fastest - if (extension_loaded('openssl')) { - return openssl_random_pseudo_bytes($length); - } - // method 2 - static $fp = true; - if ($fp === true) { - // warning's will be output unles the error suppression operator is used. errors such as - // "open_basedir restriction in effect", "Permission denied", "No such file or directory", etc. - $fp = @fopen('/dev/urandom', 'rb'); - } - if ($fp !== true && $fp !== false) { // surprisingly faster than !is_bool() or is_resource() - return fread($fp, $length); - } - // method 3. pretty much does the same thing as method 2 per the following url: - // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/mcrypt/mcrypt.c#L1391 - // surprisingly slower than method 2. maybe that's because mcrypt_create_iv does a bunch of error checking that we're - // not doing. regardless, this'll only be called if this PHP script couldn't open /dev/urandom due to open_basedir - // restrictions or some such - if (extension_loaded('mcrypt')) { - return @mcrypt_create_iv($length, MCRYPT_DEV_URANDOM); - } - } - // at this point we have no choice but to use a pure-PHP CSPRNG - - // cascade entropy across multiple PHP instances by fixing the session and collecting all - // environmental variables, including the previous session data and the current session - // data. - // - // mt_rand seeds itself by looking at the PID and the time, both of which are (relatively) - // easy to guess at. linux uses mouse clicks, keyboard timings, etc, as entropy sources, but - // PHP isn't low level to be able to use those as sources and on a web server there's not likely - // going to be a ton of keyboard or mouse action. web servers do have one thing that we can use - // however, a ton of people visiting the website. obviously you don't want to base your seeding - // soley on parameters a potential attacker sends but (1) not everything in $_SERVER is controlled - // by the user and (2) this isn't just looking at the data sent by the current user - it's based - // on the data sent by all users. one user requests the page and a hash of their info is saved. - // another user visits the page and the serialization of their data is utilized along with the - // server envirnment stuff and a hash of the previous http request data (which itself utilizes - // a hash of the session data before that). certainly an attacker should be assumed to have - // full control over his own http requests. he, however, is not going to have control over - // everyone's http requests. - static $crypto = false, $v; - if ($crypto === false) { - // save old session data - $old_session_id = session_id(); - $old_use_cookies = ini_get('session.use_cookies'); - $old_session_cache_limiter = session_cache_limiter(); - $_OLD_SESSION = isset($_SESSION) ? $_SESSION : false; - if ($old_session_id != '') { - session_write_close(); - } - - session_id(1); - ini_set('session.use_cookies', 0); - session_cache_limiter(''); - session_start(); - - $v = $seed = $_SESSION['seed'] = pack('H*', sha1( - (isset($_SERVER) ? phpseclib_safe_serialize($_SERVER) : '') . - (isset($_POST) ? phpseclib_safe_serialize($_POST) : '') . - (isset($_GET) ? phpseclib_safe_serialize($_GET) : '') . - (isset($_COOKIE) ? phpseclib_safe_serialize($_COOKIE) : '') . - phpseclib_safe_serialize($GLOBALS) . - phpseclib_safe_serialize($_SESSION) . - phpseclib_safe_serialize($_OLD_SESSION) - )); - if (!isset($_SESSION['count'])) { - $_SESSION['count'] = 0; - } - $_SESSION['count']++; - - session_write_close(); - - // restore old session data - if ($old_session_id != '') { - session_id($old_session_id); - session_start(); - ini_set('session.use_cookies', $old_use_cookies); - session_cache_limiter($old_session_cache_limiter); - } else { - if ($_OLD_SESSION !== false) { - $_SESSION = $_OLD_SESSION; - unset($_OLD_SESSION); - } else { - unset($_SESSION); - } - } - - // in SSH2 a shared secret and an exchange hash are generated through the key exchange process. - // the IV client to server is the hash of that "nonce" with the letter A and for the encryption key it's the letter C. - // if the hash doesn't produce enough a key or an IV that's long enough concat successive hashes of the - // original hash and the current hash. we'll be emulating that. for more info see the following URL: - // - // http://tools.ietf.org/html/rfc4253#section-7.2 - // - // see the is_string($crypto) part for an example of how to expand the keys - $key = pack('H*', sha1($seed . 'A')); - $iv = pack('H*', sha1($seed . 'C')); - - // ciphers are used as per the nist.gov link below. also, see this link: - // - // http://en.wikipedia.org/wiki/Cryptographically_secure_pseudorandom_number_generator#Designs_based_on_cryptographic_primitives - switch (true) { - case class_exists('\phpseclib\Crypt\AES'): - $crypto = new AES(Base::MODE_CTR); - break; - case class_exists('\phpseclib\Crypt\Twofish'): - $crypto = new Twofish(Base::MODE_CTR); - break; - case class_exists('\phpseclib\Crypt\Blowfish'): - $crypto = new Blowfish(Base::MODE_CTR); - break; - case class_exists('\phpseclib\Crypt\TripleDES'): - $crypto = new TripleDES(Base::MODE_CTR); - break; - case class_exists('\phpseclib\Crypt\DES'): - $crypto = new DES(Base::MODE_CTR); - break; - case class_exists('\phpseclib\Crypt\RC4'): - $crypto = new RC4(); - break; - default: - user_error(__CLASS__ . ' requires at least one symmetric cipher be loaded'); - return false; - } - - $crypto->setKey($key); - $crypto->setIV($iv); - $crypto->enableContinuousBuffer(); - } - - //return $crypto->encrypt(str_repeat("\0", $length)); - - // the following is based off of ANSI X9.31: - // - // http://csrc.nist.gov/groups/STM/cavp/documents/rng/931rngext.pdf - // - // OpenSSL uses that same standard for it's random numbers: - // - // http://www.opensource.apple.com/source/OpenSSL/OpenSSL-38/openssl/fips-1.0/rand/fips_rand.c - // (do a search for "ANS X9.31 A.2.4") - $result = ''; - while (strlen($result) < $length) { - $i = $crypto->encrypt(microtime()); // strlen(microtime()) == 21 - $r = $crypto->encrypt($i ^ $v); // strlen($v) == 20 - $v = $crypto->encrypt($r ^ $i); // strlen($r) == 20 - $result.= $r; - } - return substr($result, 0, $length); - } -} - -if (!function_exists('phpseclib_safe_serialize')) { - /** - * Safely serialize variables - * - * If a class has a private __sleep() method it'll give a fatal error on PHP 5.2 and earlier. - * PHP 5.3 will emit a warning. - * - * @param mixed $arr - * @access public - */ - function phpseclib_safe_serialize(&$arr) - { - if (is_object($arr)) { - return ''; - } - if (!is_array($arr)) { - return serialize($arr); - } - // prevent circular array recursion - if (isset($arr['__phpseclib_marker'])) { - return ''; - } - $safearr = array(); - $arr['__phpseclib_marker'] = true; - foreach (array_keys($arr) as $key) { - // do not recurse on the '__phpseclib_marker' key itself, for smaller memory usage - if ($key !== '__phpseclib_marker') { - $safearr[$key] = phpseclib_safe_serialize($arr[$key]); - } - } - unset($arr['__phpseclib_marker']); - return serialize($safearr); - } -} |