问题描述

我正在尝试实现与在 C# 代码中但在 PHP 中相同的 DES 加密.

I'm trying to achive the same DES encription that I've in an C# code but in PHP.

C# 代码如下所示:

public static string EncriptarCadena(string strEncriptar)
{
    DESCryptoServiceProvider provider;

    MemoryStream stream;
    CryptoStream stream2;
    string str2;
    string str = "29393651";
    byte[] buffer2 = new byte[] { 0x45, 50, 0xa5, 0x18, 0x67, 0x58, 0xac, 0xba };
    byte[] bytes = new byte[0];
    try
    {
        bytes = Encoding.UTF8.GetBytes(str.Substring(0, 8));
        provider = new DESCryptoServiceProvider();
        byte[] buffer = Encoding.UTF8.GetBytes(strEncriptar);
        stream = new MemoryStream();
        stream2 = new CryptoStream(stream, provider.CreateEncryptor(bytes, buffer2), CryptoStreamMode.Write);
        stream2.Write(buffer, 0, buffer.Length);
        stream2.FlushFinalBlock();
        str2 = Convert.ToBase64String(stream.ToArray());
    }
    catch (Exception)
    {
        str2 = "";
    }
    finally
    {
        provider = null;
        stream = null;
        stream2 = null;
    }
    return str2;
}

到目前为止，我在 PHP 中所做的代码如下:

And the code that I've done till now in PHP is the following:

function encrypt($string) {
    //Key
    $key = "29393651";
    $ivArray=array( 0x45, 50, 0xa5, 0x18, 0x67, 0x58, 0xac, 0xba );
    $iv=null;
    foreach ($ivArray as $element)
        $iv.=CHR($element);

    echo "Key: $key    IV: $iv<br>";

    $encrypted_string = mcrypt_encrypt(MCRYPT_DES, $key, $string, MCRYPT_MODE_CBC, $iv);

    return base64_encode($encrypted_string);
}

但我找不到问题出在哪里，因为对于相同的输入，它们不会给出相同的结果.

But I can't find where is the problem, as they don't give the same result for the same input.

非常欢迎任何帮助:)

推荐答案

检查您的 padding.默认情况下，PHP 在内部使用二进制 NULL x00 填充要加密的数据，这绝对不是 .NET 中的默认填充模式(很可能他们默认使用 PKCS7 填充).

Check your padding. PHP internally pads the data to be encrypted with binary NULLs x00 by default which is definitively not the default padding mode in .NET (most likely they use PKCS7 padding by default).

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