C# 使用node.js解密使用c加密的数据#

我现在面临一个需要你们帮助的问题

我用c#做一些加密。然后需要使用node.js来声明它。但我只是发现，基于我的c#加密算法，我无法正确地进行加密。如果你们有什么解决办法，请帮帮我

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);    
}

---

如果有人能为nodejs提供相同的功能，那将非常有帮助。无论如何，感谢您阅读本文。

首先，我们将使用Node.js执行

PasswordDeriveBytes

函数。这是：

接下来，使用创建解密器：

// 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

向其提供数据。他们会将解密数据的一部分返回给您。

有着完全相同的场景，我能够使用上面@icktoofay提供的代码获得成功的“C#encrypt=>Node decrypt”解决方案，但是用Rfc2898DeriveBytes替换了PasswordDeriveBytes

我的代码大致如下：

C#

实际上是我在互联网上找到的几个例子的组合

---

因为在某些特定情况下（编码字符串开头的“+”符号），我在缓冲区中实现Base64时遇到了问题，所以我使用了Base64 js from，这似乎很好。

查看语法突出显示。这就是为什么你们应该遵循惯例，不要使用大写的变量名。必须清理一下@JonathonReinhart，太痛苦了：）对不起，伙计们，我下次一定会清理干净的。谢谢你清理我的代码。你试过使用吗？是的，我试过。我试过：

crypto.pbkdf2（密码，salt，迭代，键值/8，函数（err，key）{var decipher=crypto.createDecipheriv（'aes-128-cbc'，key，initialVector）；var dec=decipher.update（text，'base64'，utf8'）+decipher.final（'utf8'）；}）不工作，我发现有一个“hashAlgorithm”我在c#中使用过，但在Node中没有。有什么意见吗？我已经试过了：
crypto.pbkdf2（密码，salt，迭代，keySize/8，函数（err，key）{var decipher=crypto.createDecipheriv（'aes-128-cbc'，key，initialVector）；var dec=decipher.update（text，'base64'，utf8'）+decipher.final（'utf8'）；}）不工作，我发现有一个“hashAlgorithm”我在c#中使用过，但在Node中没有。有意见吗？@Zhe:对于PBKDF2，Node.js只支持HMAC-SHA1。
// find algorithm from the available ciphers; see crypto.getCiphers()
var decipher = crypto.createDecipheriv(/* algorithm */, key, initialVector);

private byte[] saltBytes = ASCIIEncoding.ASCII.GetBytes(salt);

public string Encrypt<T>(string value, string password) where T: SymmetricAlgorithm, new() {
  byte[] valueBytes = UTF8Encoding.UTF8.GetBytes(value);

  byte[] encrypted = null;
  using (T cipher = new T()) {
    var db = new Rfc2898DeriveBytes(password, saltBytes);
    db.IterationCount = iterationsConst;
    var key = db.GetBytes(keySizeConst / 8);

    cipher.Mode = CipherMode.CBC;

    using (ICryptoTransform encryptor = cipher.CreateEncryptor(key, vectorBytes)) {
      using (MemoryStream ms = new MemoryStream()) {
        using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write)) {
          cs.Write(valueBytes, 0, valueBytes.Length);
          cs.FlushFinalBlock();
          encrypted = ms.ToArray();
        }
      }
    }
    cipher.Clear();
  }
  return Convert.ToBase64String(encrypted);
}

var crypto = require('crypto');
var base64 = require('base64-js');
var algorithm = 'AES-256-CBC';

[...]

var saltBuffer = new Buffer(salt);
var passwordBuffer = new Buffer(password);

[...]

var encodedBuffer = new Buffer(base64.toByteArray(encryptedStringBase64Encoded));

crypto.pbkdf2(passwordBuffer, saltBuffer, iterations, keySize / 8, function(err, key) {
  var decipher = crypto.createDecipheriv(algorithm, key, iv);
  var dec = Buffer.concat([decipher.update(encodedBuffer), decipher.final()]);
  return dec;
});