使用node.js解密使用c＃ [英] Using node.js to decrypt data encrypted using c#

问题描述

我现在面对一个需要你帮助的问题。

I'm facing a issue now which need you guys help.

我使用c＃做一些加密。然后需要使用node.js来解密它。但我刚刚发现，我不能做正确基于我的c＃加密算法。如果你们有任何解决方案，请帮助我。

I use c# to do some encryption. Then need to use node.js to decry-pt it. But I just found that I can't do it correctly base on my c# encryption algorithm. If you guys have any solution, please help me.

这是我的c＃加密代码：

Here is my c# encryption code:

public static string Encrypt(string text, String password, string salt, string hashAlgorithm, int passwordIterations, string initialVector, int keySize)
{
    if (string.IsNullOrEmpty(text))
        return "";

    var initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
    var saltValueBytes = Encoding.ASCII.GetBytes(salt);
    var plainTextBytes = Encoding.UTF8.GetBytes(text);
    var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
    var keyBytes = derivedPassword.GetBytes(keySize / 8);
    var symmetricKey = new RijndaelManaged();
    symmetricKey.Mode = CipherMode.CBC;
    byte[] cipherTextBytes = null;
    using (var encryptor = symmetricKey.CreateEncryptor(keyBytes, initialVectorBytes))
    {
        using (var memStream = new MemoryStream())
        {
            using (var cryptoStream = new CryptoStream(memStream, encryptor, CryptoStreamMode.Write))
            {
                cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
                cryptoStream.FlushFinalBlock();
                cipherTextBytes = memStream.ToArray();
                memStream.Close();
                cryptoStream.Close();
            }
        }
    }
    symmetricKey.Clear();
    return Convert.ToBase64String(cipherTextBytes);
}
public static string Decrypt(string text, String password, string salt, string hashAlgorithm, int passwordIterations, string initialVector, int keySize)
{
    if (string.IsNullOrEmpty(text))
        return "";

    var initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
    var saltValueBytes = Encoding.ASCII.GetBytes(salt);
    var cipherTextBytes = Convert.FromBase64String(text);
    var derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
    var keyBytes = derivedPassword.GetBytes(keySize / 8);
    var symmetricKey = new RijndaelManaged();
    symmetricKey.Mode = CipherMode.CBC;
    var plainTextBytes = new byte[cipherTextBytes.Length];
    var byteCount = 0;
    using (var decryptor = symmetricKey.CreateDecryptor(keyBytes, initialVectorBytes))
    {
        using (var memStream = new MemoryStream(cipherTextBytes))
        {
            using (var cryptoStream = new CryptoStream(memStream, decryptor, CryptoStreamMode.Read))
            {

                byteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
                memStream.Close();
                cryptoStream.Close();
            }
        }
    }
    symmetricKey.Clear();
    return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);    
}

如果任何人都可以为nodejs提供一个相同的函数， 。无论如何，感谢您阅读这篇文章。

If anyone can give me a same function for nodejs, that's will be really help. Anyway, thanks for read this post.

推荐答案

首先，我们将 PasswordDeriveBytes 函数。这是 crypto.pbkdf2 ：

First, we'll do the PasswordDeriveBytes function with Node.js. This is crypto.pbkdf2:

// assumes HMAC-SHA1
crypto.pbkdf2(password, salt, iterations, keySize / 8, function(err, key) {
    if(err) /* handle error */
    // ...
});

接下来，使用 crypto.createDecipheriv 创建解密器：

Next, use crypto.createDecipheriv to create a decryptor:

// find algorithm from the available ciphers; see crypto.getCiphers()
var decipher = crypto.createDecipheriv(/* algorithm */, key, initialVector);

然后使用 decipher.update 和 decipher.final 以向其提供数据。他们会将部分解密数据返回给您。

Then use decipher.update and decipher.final to feed it the data. They will return portions of decrypted data to you.

这篇关于使用node.js解密使用c＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！