C#/.NET 和 PHP 之间的 TripleDES 加密

Question

我必须在我的 PHP 应用程序中实施一些 TripleDES 加密才能与 C#/.NET 应用程序通信，但与服务器端 C#/.NET 应用程序相比，我得到的结果不同。我已经尝试使用不同的编码和标志，但没有成功。

我已经能够从 C#/.NET 中解密字符串并在 PHP 中获得所需的结果（基于 Whosebug 和其他站点上的示例）。

可在此处找到并执行服务器端 C#/.NET 代码：

using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;

public class Program
{
    public static void Main()
    {
        Console.WriteLine(Encrypt("SourceString123", "fsgerh", "Dataehaeh"));
        Console.WriteLine(Decrypt("Vql0pOr7ouxfUScI3H8exeFbfmcfE5uM3TBtAZXAq0zwkJmqEe13EA==", "fsgerh", "Dataehaeh"));
    }

    public static string Encrypt(string value, string password, string salt)
    {
        DeriveBytes rgb = new Rfc2898DeriveBytes(password, Encoding.Unicode.GetBytes(salt));
        SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();
        byte[] rgbKey = rgb.GetBytes(algorithm.KeySize >> 3);
        byte[] rgbIV = rgb.GetBytes(algorithm.BlockSize >> 3);
        ICryptoTransform transform = algorithm.CreateEncryptor(rgbKey, rgbIV);
        using (MemoryStream buffer = new MemoryStream())
        {
            using (CryptoStream stream = new CryptoStream(buffer, transform, CryptoStreamMode.Write))
            {
                using (StreamWriter writer = new StreamWriter(stream, Encoding.Unicode))
                {
                    writer.Write(value);
                }
            }
            return Convert.ToBase64String(buffer.ToArray());
        }
    }

    public static string Decrypt(string text, string password, string salt)
    {
        DeriveBytes rgb = new Rfc2898DeriveBytes(password, Encoding.Unicode.GetBytes(salt));
        SymmetricAlgorithm algorithm = new TripleDESCryptoServiceProvider();
        byte[] rgbKey = rgb.GetBytes(algorithm.KeySize >> 3);
        byte[] rgbIV = rgb.GetBytes(algorithm.BlockSize >> 3);
        ICryptoTransform transform = algorithm.CreateDecryptor(rgbKey, rgbIV);
        using (MemoryStream buffer = new MemoryStream(Convert.FromBase64String(text)))
        {
            using (CryptoStream stream = new CryptoStream(buffer, transform, CryptoStreamMode.Read))
            {
                using (StreamReader reader = new StreamReader(stream, Encoding.Unicode))
                {
                    return reader.ReadToEnd();
                }
            }
        }
    }

}

"cient"端的PHP代码可以在这里找到并执行：

http://phpfiddle.org/lite/code/hkgu-n1fe

<?php

$decrypted = 'SourceString123';
$encrypted = 'Vql0pOr7ouxfUScI3H8exeFbfmcfE5uM3TBtAZXAq0zwkJmqEe13EA==';

$password = 'fsgerh';
$salt = 'Dataehaeh';

$hash = hash_pbkdf2("sha1", $password, mb_convert_encoding($salt, 'UTF-16LE'), 1000, 32, true); 

$key = substr($hash, 0, 24);
$iv = substr($hash, 24, 8);

echo base64_encode($key) . "<br />";
echo base64_encode($iv) . "<br /><br />";

$result = mb_convert_encoding(openssl_decrypt($encrypted, 'des-ede3-cbc', $key, 0, $iv), 'UTF-8', 'UTF-16');
echo $result;
echo "<br /><br />";

$result = openssl_encrypt(mb_convert_encoding($decrypted, 'UTF-8'), 'des-ede3-cbc', $key, 0, $iv);
echo $result;
echo "<br /><br />";

$result = openssl_encrypt(mb_convert_encoding($decrypted, 'UTF-16'), 'des-ede3-cbc', $key, 0, $iv);
echo $result;
echo "<br /><br />";

?>

我花了几个小时来找出问题，但还没能解决。

如果有人能发现问题或指出正确的方向，我将不胜感激。

Answer 1

PHP 代码使用 hash_pbkdf2 和 sha1 算法。

TripleDES是对称加密，和sha1是哈希函数有很大区别

TripleDES可以参考Using Triple DES(3DES) with PHP 7.1PHP

Answer 2

我使用 iconv() 而不是 mb_convert_encoding() 解决了这个问题，现在我在 PHP 和 .NET/C# 中得到了预期的结果。以下代码显示了我的结果以供参考。

<?php

$decrypted = 'SourceString123';
$encrypted = 'Vql0pOr7ouxfUScI3H8exeFbfmcfE5uM3TBtAZXAq0zwkJmqEe13EA==';

$password = 'fsgerh';
$salt = 'Dataehaeh';

$hash = hash_pbkdf2("sha1", $password, mb_convert_encoding($salt, 'UTF-16LE'), 1000, 32, true); 

$key = substr($hash, 0, 24);
$iv = substr($hash, 24, 8);

echo base64_encode($key) . "<br />";
echo base64_encode($iv) . "<br /><br />";

$result = iconv('UTF-16', 'UTF-8', openssl_decrypt($encrypted, 'des-ede3-cbc', $key, 0, $iv));
echo $result;
echo "<br /><br />";

$result = openssl_encrypt(iconv('UTF-8', 'UTF-16', $decrypted), 'des-ede3-cbc', $key, 0, $iv);
echo $result;
echo "<br />";

?>

C#/.NET 和 PHP 之间的 TripleDES 加密

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