Question

您好我正在处理一些解密某些.NET应用程序生成的cookie的代码

function hex2a(hex) {
    var str = '';
    for (var i = 0; i < hex.length; i += 2)
        str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
    return str;
}

//Raw cookie
var cookie = "B417B464CA63FE780584563D2DA4709B03F6195189044C26A29770F3203881DD90B1428139088D945CF6807CA408F201DABBADD59CE1D740F853A894692273F1CA83EC3F26493744E3D25D720374E03393F71E21BE2D96B6110CB7AC12E44447FFBD810D3D57FBACA8DF5249EB503C3DFD255692409F084650EFED205388DD8C08BF7B941E1AC1B3B70B9A8E09118D756BEAFF25834E72357FD40E80E76458091224FAE8";

//decryptionKey from issuers <machineKey>
var deckey = "FFA87B82D4A1BEAA15C06F6434A7EB2251976A838784E134900E6629B9F954B7";


var crypto = require('crypto');

var ivc = cookie, iv, cipherText, ivSize = 16, res = "";

ivc = new Buffer(ivc, 'hex');
iv = new Buffer(ivSize);
cipherText = new Buffer(ivc.length - ivSize);
ivc.copy(iv, 0, 0, ivSize);
ivc.copy(cipherText, 0, ivSize);

c = crypto.createDecipheriv('aes-256-cbc', hex2a(deckey), iv.toString('binary'));
res = c.update(cipherText, "binary", "utf8");

代码在5.9.0节点上运行，但在升级到6.10.1后停止运行

我得到的错误信息是“无效的IV长度”。

请帮助

感谢前进

Answer 1

Node v6中对crypto进行了一些更改，特别是有关默认编码的更改。

试试这个：

c = crypto.createDecipheriv('aes-256-cbc', Buffer.from(deckey, 'hex'), iv);

将升级后的节点解密为6.10.1后，将无效的IV长度错误

1 个答案: