Defuse\Crypto\RuntimeTests::AESTestVector PHP Method

    private static function AESTestVector()
    {
        // AES CTR mode test vector from NIST SP 800-38A
        $key = Encoding::hexToBin('603deb1015ca71be2b73aef0857d7781' . '1f352c073b6108d72d9810a30914dff4');
        $iv = Encoding::hexToBin('f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff');
        $plaintext = Encoding::hexToBin('6bc1bee22e409f96e93d7e117393172a' . 'ae2d8a571e03ac9c9eb76fac45af8e51' . '30c81c46a35ce411e5fbc1191a0a52ef' . 'f69f2445df4f9b17ad2b417be66c3710');
        $ciphertext = Encoding::hexToBin('601ec313775789a5b7a7f504bbf3d228' . 'f443e3ca4d62b59aca84e990cacaf5c5' . '2b0930daa23de94ce87017ba2d84988d' . 'dfc9c58db67aada613c2dd08457941a6');
        $computed_ciphertext = Crypto::plainEncrypt($plaintext, $key, $iv);
        if ($computed_ciphertext !== $ciphertext) {
            echo \str_repeat("\n", 30);
            echo \bin2hex($computed_ciphertext);
            echo "\n---\n";
            echo \bin2hex($ciphertext);
            echo \str_repeat("\n", 30);
            throw new Ex\EnvironmentIsBrokenException();
        }
        $computed_plaintext = Crypto::plainDecrypt($ciphertext, $key, $iv, Core::CIPHER_METHOD);
        if ($computed_plaintext !== $plaintext) {
            throw new Ex\EnvironmentIsBrokenException();
        }
    }

 /**
  * Runs the runtime tests.
  *
  * @throws Ex\EnvironmentIsBrokenException
  */
 public static function runtimeTest()
 {
     // 0: Tests haven't been run yet.
     // 1: Tests have passed.
     // 2: Tests are running right now.
     // 3: Tests have failed.
     static $test_state = 0;
     if ($test_state === 1 || $test_state === 2) {
         return;
     }
     if ($test_state === 3) {
         /* If an intermittent problem caused a test to fail previously, we
          * want that to be indicated to the user with every call to this
          * library. This way, if the user first does something they really
          * don't care about, and just ignores all exceptions, they won't get
          * screwed when they then start to use the library for something
          * they do care about. */
         throw new Ex\EnvironmentIsBrokenException('Tests failed previously.');
     }
     try {
         $test_state = 2;
         Core::ensureFunctionExists('openssl_get_cipher_methods');
         if (\in_array(Core::CIPHER_METHOD, \openssl_get_cipher_methods()) === false) {
             throw new Ex\EnvironmentIsBrokenException('Cipher method not supported. This is normally caused by an outdated ' . 'version of OpenSSL (and/or OpenSSL compiled for FIPS compliance). ' . 'Please upgrade to a newer version of OpenSSL that supports ' . Core::CIPHER_METHOD . ' to use this library.');
         }
         RuntimeTests::AESTestVector();
         RuntimeTests::HMACTestVector();
         RuntimeTests::HKDFTestVector();
         RuntimeTests::testEncryptDecrypt();
         if (Core::ourStrlen(Key::createNewRandomKey()->getRawBytes()) != Core::KEY_BYTE_SIZE) {
             throw new Ex\EnvironmentIsBrokenException();
         }
         if (Core::ENCRYPTION_INFO_STRING == Core::AUTHENTICATION_INFO_STRING) {
             throw new Ex\EnvironmentIsBrokenException();
         }
     } catch (Ex\EnvironmentIsBrokenException $ex) {
         // Do this, otherwise it will stay in the "tests are running" state.
         $test_state = 3;
         throw $ex;
     }
     // Change this to '0' make the tests always re-run (for benchmarking).
     $test_state = 1;
 }