PHP中的AES-256-CBC加密和Node.js中的解密 [英] AES-256-CBC encryption in PHP and decryption in Node.js

问题描述

我的问题是，我编码一个字符串在PHP与m_crypt模块在aes-256-cbc与base64像这样：

my problem is that I encode a string in PHP with the m_crypt module in aes-256-cbc with base64 like this:

    function encrypt($data) {
        if(32 !== strlen($this->secret)) $this->secret = hash('SHA256', $this->secret, true);
        $padding = 16 - (strlen($data) % 16);
        $data .= str_repeat(chr($padding), $padding);

        $encrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $this->secret, $data, MCRYPT_MODE_CBC, str_repeat("\0", 16));

        return base64_encode($encrypt);
    }

其中$ this-> secret是32位aes键和$ data是我要加密的字符串。

Where $this->secret is a 32-bit aes key and $data is the string I want to encrypt.

这工作正常，文本是加密的，并发送到服务器没有任何问题（我检查了两次！），现在我想使用Node.JS解码这整个东西像这样：

This works fine, the text is encrypted and send to the server without any problems (I checked that twice!) and now i want to decode this whole thing with Node.JS like this:

    var decipher = Core.crypto.createDecipher('aes-256-cbc', rows[0]['sessionkey']);
    decipher.update(body.user, 'base64', 'utf8');
    var user = decipher.final('utf8');

其中Core.crypto是Node.JS中普通加密模块的require调用，rows [0 ] ['sessionkey']是用于通过mysql请求加密的密钥，body.user是通过post请求发送的PHP加密字符串。

Where Core.crypto is the require call of the normal crypto module in Node.JS, rows[0]['sessionkey'] is the key used for encryption recived via mysql request and body.user is the PHP encrypted string send via post request.

工作正常，除了这个小的decypt的东西...我搜索google和一切，并尝试了示例代码，但似乎有些事情与我的代码是不正确的。

As I mentioned, everything works fine, except for this little decypt thing... i searched google and everything and tried sample code, but it seems that something with my code is not right.

推荐答案

Ok我想出了自己。我忘记在Node.js中解密消息时设置iv，工作代码如下所示：

Ok I figured it out myself. I forgot to set the iv when decrypting the message in Node.js, the working code looks like this:

var key =  new Buffer(rows[0]['sessionkey'], 'binary');

function decipher(key, data) {
    var decipher = Core.crypto.createDecipheriv('aes-256-cbc', key.toString('binary'), str_repeat('\0', 16));
    decipher.update(data, 'base64', 'utf8');
    return decipher.final('utf8');
}

我希望这将有助于未来的任何人！

I hope this will help anyone in the future!

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