C# 用Php加密的ASP.Net解密字符串

我正在用PHP加密数据，如下所示：

$encrypted_string = mcrypt_encrypt(MCRYPT_DES, 'abcdefgh' , $input, MCRYPT_MODE_CBC, 'qwerasdf' );
$encrypted_string = base64_encode($encrypted_string);
return  $encrypted_string;

public string Decrypt(string input)
{
    input = Server.UrlDecode(input);
    byte[] binary = Convert.FromBase64String(input);
    input = Encoding.GetEncoding(28591).GetString(binary);

    DES tripleDes = DES.Create();
    tripleDes.IV = Encoding.ASCII.GetBytes("NAVEEDNA");
    tripleDes.Key = Encoding.ASCII.GetBytes("abcdegef");
    tripleDes.Mode = CipherMode.CBC;
    tripleDes.Padding = PaddingMode.Zeros;

    ICryptoTransform crypto = tripleDes.CreateDecryptor();
    byte[] decodedInput = Decoder(input);
    byte[] decryptedBytes = crypto.TransformFinalBlock(decodedInput, 0, decodedInput.Length);
    return Encoding.ASCII.GetString(decryptedBytes);
}

public byte[] Decoder(string input)
{
    byte[] bytes = new byte[input.Length / 2];
    int targetPosition = 0;

    for (int sourcePosition = 0; sourcePosition < input.Length; sourcePosition += 2)
    {
        string hexCode = input.Substring(sourcePosition, 2);
        bytes[targetPosition++] = Byte.Parse(hexCode, NumberStyles.AllowHexSpecifier);
    }
    return bytes;
}

并在C中对其进行解密，如下所示：

$encrypted_string = mcrypt_encrypt(MCRYPT_DES, 'abcdefgh' , $input, MCRYPT_MODE_CBC, 'qwerasdf' );
$encrypted_string = base64_encode($encrypted_string);
return  $encrypted_string;

public string Decrypt(string input)
{
    input = Server.UrlDecode(input);
    byte[] binary = Convert.FromBase64String(input);
    input = Encoding.GetEncoding(28591).GetString(binary);

    DES tripleDes = DES.Create();
    tripleDes.IV = Encoding.ASCII.GetBytes("NAVEEDNA");
    tripleDes.Key = Encoding.ASCII.GetBytes("abcdegef");
    tripleDes.Mode = CipherMode.CBC;
    tripleDes.Padding = PaddingMode.Zeros;

    ICryptoTransform crypto = tripleDes.CreateDecryptor();
    byte[] decodedInput = Decoder(input);
    byte[] decryptedBytes = crypto.TransformFinalBlock(decodedInput, 0, decodedInput.Length);
    return Encoding.ASCII.GetString(decryptedBytes);
}

public byte[] Decoder(string input)
{
    byte[] bytes = new byte[input.Length / 2];
    int targetPosition = 0;

    for (int sourcePosition = 0; sourcePosition < input.Length; sourcePosition += 2)
    {
        string hexCode = input.Substring(sourcePosition, 2);
        bytes[targetPosition++] = Byte.Parse(hexCode, NumberStyles.AllowHexSpecifier);
    }
    return bytes;
}

公共字符串解密（字符串输入）
{
输入=Server.UrlDecode（输入）；
字节[]二进制=Convert.FromBase64String（输入）；
输入=Encoding.GetEncoding（28591）.GetString（二进制）；
DES tripleDes=DES.Create（）；
tripleDes.IV=Encoding.ASCII.GetBytes（“NAVEEDNA”）；
tripleDes.Key=Encoding.ASCII.GetBytes（“abcdegef”）；
tripleDes.Mode=CipherMode.CBC；
三倍。填充=填充模式。零；
ICryptoTransform crypto=tripleDes.CreateDecryptor（）；
字节[]decodedInput=解码器（输入）；
byte[]decryptedBytes=crypto.TransformFinalBlock（decodedInput，0，decodedInput.Length）；
返回Encoding.ASCII.GetString（decryptedBytes）；
}
公共字节[]解码器（字符串输入）
{
字节[]字节=新字节[input.Length/2]；
int targetPosition=0；
对于（int-sourcePosition=0；sourcePosition

当我试图在C中解密字符串时，它抛出以下异常：

$encrypted_string = mcrypt_encrypt(MCRYPT_DES, 'abcdefgh' , $input, MCRYPT_MODE_CBC, 'qwerasdf' );
$encrypted_string = base64_encode($encrypted_string);
return  $encrypted_string;

public string Decrypt(string input)
{
    input = Server.UrlDecode(input);
    byte[] binary = Convert.FromBase64String(input);
    input = Encoding.GetEncoding(28591).GetString(binary);

    DES tripleDes = DES.Create();
    tripleDes.IV = Encoding.ASCII.GetBytes("NAVEEDNA");
    tripleDes.Key = Encoding.ASCII.GetBytes("abcdegef");
    tripleDes.Mode = CipherMode.CBC;
    tripleDes.Padding = PaddingMode.Zeros;

    ICryptoTransform crypto = tripleDes.CreateDecryptor();
    byte[] decodedInput = Decoder(input);
    byte[] decryptedBytes = crypto.TransformFinalBlock(decodedInput, 0, decodedInput.Length);
    return Encoding.ASCII.GetString(decryptedBytes);
}

public byte[] Decoder(string input)
{
    byte[] bytes = new byte[input.Length / 2];
    int targetPosition = 0;

    for (int sourcePosition = 0; sourcePosition < input.Length; sourcePosition += 2)
    {
        string hexCode = input.Substring(sourcePosition, 2);
        bytes[targetPosition++] = Byte.Parse(hexCode, NumberStyles.AllowHexSpecifier);
    }
    return bytes;
}

输入字符串的格式不正确

在下一行：Byte.Parse（hexCode，NumberStyles.allowehexspecifier）

知道我做错了什么吗？

试试

Byte.Parse（hexCode，System.Globalization.numberstyle.HexNumber）

因为AllowHexSpecifier用于0x1b样式的十六进制数