Question

我们有一个使用Persits Software的aspEncrypt的遗留Web应用程序。我有数千个使用该设置加密的文件，因此我需要保持兼容。

我正在尝试在C＃中编写一个新的实用程序应用程序以匹配相同的加密。这里的目标是不在新应用程序中使用aspEncrypt，并使用.NET框架内置的东西来匹配加密。如果成功，那么我可以在旧文件和新文件上使用相同的传统解密例程。

使用aspEncrypt处理加密步骤的示例代码：

public static int EncryptFileWithRawKey2()
{
    string InputFile = @"D:\TEMP\004\testfile.txt"; // contains single line of ANSI text with no end of line characters "hello this is a file"
    string OutPutFile = @"D:\TEMP\004\testfile.txt.3.xxx";
    string RawKey = "4CDD1518CD6662C9D1583A8732173EDC";

    int iRet = 0;

    ASPENCRYPTLib.ICryptoKey eKey = null;

    try
    {
        ASPENCRYPTLib.CryptoManager CM = new ASPENCRYPTLib.CryptoManager();
        ASPENCRYPTLib.ICryptoContext Context = CM.OpenContext("", 0, 0);

        ASPENCRYPTLib.ICryptoBlob Blob = CM.CreateBlob();
        Blob.Hex = RawKey;
        eKey = Context.ImportRawKey(Blob, ASPENCRYPTLib.CryptoAlgorithms.calgRC2);

        ASPENCRYPTLib.ICryptoBlob IVblob = CM.CreateBlob();
        IVblob.Hex = "0000000000000000";
        eKey.SetIV(IVblob);


        eKey.Mode = ASPENCRYPTLib.CryptoCipherModes.ccmCBC;
        eKey.Padding = ASPENCRYPTLib.CryptoCipherPadding.ccpPKCS5;
        eKey.EffectiveLength = 40;

        eKey.EncryptFile(InputFile.Trim(), OutPutFile.Trim());
        if (File.Exists(OutPutFile) == true)
            iRet = 1;


    }
    catch (Exception e)
    {
        Console.WriteLine("EncryptFileWithRawKey2 FAILED");
        Console.WriteLine(e.ToString());
        iRet = - 1;
    }

    return iRet;
}

这是我写的代码，到目前为止，这是一个不成功的尝试来匹配它：

public static void EncryptTextToFile2()
{

    String Data = "hello this is a file";
    String FileName = @"D:\TEMP\004\testfile.txt.4.xxx";
    String sTempKey = "4CDD1518CD6662C9D1583A8732173EDC";

    byte[] Key;
    byte[] IV;

    try
    {
        Key = StringToByteArray(sTempKey);
        IV = StringToByteArray("0000000000000000");

        FileStream fStream = File.Open(FileName, FileMode.OpenOrCreate);

        RC2 RC2alg = RC2.Create();
        RC2alg.Padding = PaddingMode.PKCS7;
        RC2alg.Mode = CipherMode.CBC;
        RC2alg.KeySize = 40;
        RC2alg.EffectiveKeySize = 40;

        CryptoStream cStream = new CryptoStream(fStream, RC2alg.CreateEncryptor(Key, IV), CryptoStreamMode.Write);
        cStream.FlushFinalBlock();

        StreamWriter sWriter = new StreamWriter(cStream);
        sWriter.WriteLine(Data);

        sWriter.Close();
        cStream.Close();
        fStream.Close();

    }
    catch (CryptographicException e)
    {
        Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
    }
    catch (UnauthorizedAccessException e)
    {
        Console.WriteLine("A file error occurred: {0}", e.Message);
    }

}

public static byte[] StringToByteArray(string hex)
{
    return Enumerable.Range(0, hex.Length)
                     .Where(x => x % 2 == 0)
                     .Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
                     .ToArray();
}

两个例程的输出不匹配。我无法更改使用AspEncrypt库的逻辑，因此我需要以某种方式更改第二部分代码以匹配第一部分的输出。

使用与aspEncrypt加密匹配的.NET库加密文本

0 个答案: