c# - 使用node.js解密使用c#加密的数据

Question

我现在遇到一个问题，需要你们的帮助。

我使用 C# 进行一些加密。然后需要使用node.js来解密它。但我发现我无法根据我的 C# 加密算法正确执行此操作。如果你们有任何解决方案，请帮助我。

这是我的 C# 加密代码:

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);    
}

如果有人能给我一个相同的 Nodejs 函数，那将非常有帮助。不管怎样，感谢您阅读这篇文章。

Answer 1

首先，我们将使用 Node.js 执行 PasswordDeriveBytes 函数。这是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:

// 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 为其提供数据。他们会将部分解密数据返回给您。