相关疑难解决方法(0)

我有一个加密的文本,我需要解密.它是用AES-256-CBC加密的.我有加密的文本,密钥和iv.然而,无论我尝试什么,我似乎无法让它工作.

互联网已经建议mcrypt的Rijndael密码能够做到这一点,所以这就是我现在所拥有的:

function decrypt_data($data, $iv, $key) {
    $cypher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

    // initialize encryption handle
    if (mcrypt_generic_init($cypher, $key, $iv) != -1) {
        // decrypt
        $decrypted = mdecrypt_generic($cypher, $data);

        // clean up
        mcrypt_generic_deinit($cypher);
        mcrypt_module_close($cypher);

        return $decrypted;
    }

    return false;
}

现在,我得到2个警告,输出是胡言乱语:

Warning: mcrypt_generic_init() [function.mcrypt-generic-init]: Key size too large; supplied length: 64, max: 32 in /var/www/includes/function.decrypt_data.php on line 8
Warning: mcrypt_generic_init() [function.mcrypt-generic-init]: Iv size incorrect; supplied length: 32, needed: 16 in /var/www/includes/function.decrypt_data.php on line 8

任何帮助,将不胜感激.