/**
  * @dataProvider continuousBufferCombos
  */
 public function testEncryptDecryptWithContinuousBuffer($mode, $plaintext, $iv, $key)
 {
     $aes = new Crypt_AES(constant($mode));
     $aes->enableContinuousBuffer();
     $aes->setIV($iv);
     $aes->setKey($key);
     $actual = '';
     for ($i = 0, $strlen = strlen($plaintext); $i < $strlen; ++$i) {
         $actual .= $aes->decrypt($aes->encrypt($plaintext[$i]));
     }
     $this->assertEquals($plaintext, $actual);
 }
示例#2
0
 function random($len)
 {
     if (CRYPT_IS_WINDOWS) {
         if (function_exists('openssl_random_pseudo_bytes') && version_compare(PHP_VERSION, '5.3.4', '>=')) {
             return openssl_random_pseudo_bytes($len);
         }
         // Looks like mcrypt_create_iv with MCRYPT_DEV_RANDOM is still
         // unreliable on 5.3.6:
         // https://bugs.php.net/bug.php?id=52523
         if (function_exists('mcrypt_create_iv') && version_compare(PHP_VERSION, '5.3.7', '>=')) {
             return mcrypt_create_iv($len);
         }
     } else {
         if (function_exists('openssl_random_pseudo_bytes')) {
             return openssl_random_pseudo_bytes($len);
         }
         static $fp = null;
         if ($fp == null) {
             $fp = @fopen('/dev/urandom', 'rb');
         }
         if ($fp) {
             return fread($fp, $len);
         }
         if (function_exists('mcrypt_create_iv')) {
             return mcrypt_create_iv($len, MCRYPT_DEV_URANDOM);
         }
     }
     $seed = session_id() . microtime() . getmypid();
     $key = pack('H*', sha1($seed . 'A'));
     $iv = pack('H*', sha1($seed . 'C'));
     $crypto = new Crypt_AES(CRYPT_AES_MODE_CTR);
     $crypto->setKey($key);
     $crypto->setIV($iv);
     $crypto->enableContinuousBuffer();
     //Sliding iv.
     $start = mt_rand(5, PHP_INT_MAX);
     $output = '';
     for ($i = $start; strlen($output) < $len; $i++) {
         $output .= $crypto->encrypt($i);
     }
     return substr($output, 0, $len);
 }