PHP Crypto::RuntimeTest方法代码示例

 /**
  * This method is called before the first test of this test class is run.
  *
  * @return  void
  */
 public static function setUpBeforeClass()
 {
     // Only run the test if the environment supports it.
     try {
         Crypto::RuntimeTest();
     } catch (CryptoTestFailedException $e) {
         self::markTestSkipped('The environment cannot safely perform encryption with this cipher.');
     }
 }

 public static function Decrypt($ciphertext, $key)
 {
     Crypto::RuntimeTest();
     // Extract the HMAC from the front of the ciphertext.
     if (self::our_strlen($ciphertext) <= self::MAC_BYTE_SIZE) {
         throw new InvalidCiphertextException();
     }
     $hmac = self::our_substr($ciphertext, 0, self::MAC_BYTE_SIZE);
     if ($hmac === FALSE) {
         throw new CannotPerformOperationException();
     }
     $ciphertext = self::our_substr($ciphertext, self::MAC_BYTE_SIZE);
     if ($ciphertext === FALSE) {
         throw new CannotPerformOperationException();
     }
     // Regenerate the same authentication sub-key.
     $akey = self::HKDF(self::HASH_FUNCTION, $key, self::KEY_BYTE_SIZE, self::AUTHENTICATION_INFO);
     if (self::VerifyHMAC($hmac, $ciphertext, $akey)) {
         // Regenerate the same encryption sub-key.
         $keysize = self::KEY_BYTE_SIZE;
         $ekey = self::HKDF(self::HASH_FUNCTION, $key, $keysize, self::ENCRYPTION_INFO);
         // Extract the initialization vector from the ciphertext.
         self::EnsureFunctionExists("mcrypt_get_iv_size");
         $ivsize = mcrypt_get_iv_size(self::CIPHER, self::CIPHER_MODE);
         if ($ivsize === FALSE || $ivsize <= 0) {
             throw new CannotPerformOperationException();
         }
         if (self::our_strlen($ciphertext) <= $ivsize) {
             throw new InvalidCiphertextException();
         }
         $iv = self::our_substr($ciphertext, 0, $ivsize);
         if ($iv === FALSE) {
             throw new CannotPerformOperationException();
         }
         $ciphertext = self::our_substr($ciphertext, $ivsize);
         if ($ciphertext === FALSE) {
             throw new CannotPerformOperationException();
         }
         $plaintext = self::PlainDecrypt($ciphertext, $ekey, $iv);
         return $plaintext;
     } else {
         /*
          * We throw an exception instead of returning FALSE because we want
          * a script that doesn't handle this condition to CRASH, instead
          * of thinking the ciphertext decrypted to the value FALSE.
          */
         throw new InvalidCiphertextException();
     }
 }

<?php

// Set the encoding to something more "challenging."
$ret = mb_internal_encoding('UTF-8');
if ($ret === FALSE) {
    echo "Couldn't set encoding.";
    exit(1);
}
// Dump out the settings / encoding for future reference.
$val = ini_get("mbstring.func_overload");
echo "Settings: \n";
echo "    func_overload: " . $val . "\n";
echo "    mb_internal_encoding(): " . mb_internal_encoding() . "\n";
// Perform the tests.
require_once 'Crypto.php';
try {
    Crypto::RuntimeTest();
    echo "TEST PASSED!\n";
    exit(0);
} catch (CryptoTestFailedException $ex) {
    echo "TEST FAILED!\n";
    var_dump($ex);
    exit(1);
} catch (CannotPerformOperationException $ex) {
    echo "TEST FAILED\n";
    var_dump($ex);
    exit(1);
}