使用 openssl 解密 mcrypt

My question to you is: Is there any way you can decrypt with openssl data previously encrypted with mcrypt? I've read so many posts on this matter and most of them say that a previous manual padding of the data was/is necessary before running mcrypt on it. The issue is that the mcrypt-ed data is already encrypted (with the automatic null padding mcrypt provides) and resides in a database, so modification of that is not possible and/or desired.

提及:

1. 使用的算法是带有 32 字节密钥的 rijndael-128 cbc(所以我将 aes-256-cbc 用于 openssl).
2. 我正在为 php (php-crypto) 使用 openssl 包装器.
3. 通过简单地剥离非字母数字的结尾解码字符，我设法使逆运算起作用(使用 mcrypt 解码 openssl).
4. 在 mcrypt-ing 之前手动填充数据，然后使用 openssl 解密它就像一个魅力，但这不是这里的问题.

一些代码片段:

// Simple mcrypt encrypt, decrypt with php-crypto example
// This doesn't work and produces a "Finalizing of cipher failed" error
        $data = "This is a text";
        $strMcryptData=mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv);

        $algorithm = 'aes-256-cbc';
        $cipher = new Cipher($algorithm);
        $sim_text = $cipher->decrypt($strMcryptData, $key, $iv);

// Simple mcrypt encrypt with padding, decrypt with php-crypto
// Works and produces the correct text on decryption
        $pad =  $blocksize - (strlen($data) % $blocksize);
        $text = $data;
        $text .= str_repeat(chr($pad), $pad);
        $strPaddedData=mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $text, MCRYPT_MODE_CBC, $iv);

        $sim_text = $cipher->decrypt($strPaddedData, $key, $iv);

推荐答案

如果你在 mcrypt 中加密而不手动添加 PKCS7，mcrypt 会很乐意用 NUL 字节填充你的明文.