c#和avascript加解密之间的互转代码分享

1：Xxtea支持中文；

2：支持JS和C#加解密之间的互转；

一：C#部分

代码如下:

class XXTEA2 
{ 
    public static string Encrypt(string source, string key) 
    { 
        System.Text.Encoding encoder = System.Text.Encoding.UTF8; 
        //UTF8==>BASE64==>XXTEA==>BASE64 
        byte[] bytData = encoder.GetBytes(base64Encode(source)); 
        byte[] bytKey = encoder.GetBytes(key); 
        if (bytData.Length == 0) 
        { 
            return ""; 
        } 
        return System.Convert.ToBase64String(ToByteArray(Encrypt(ToUInt32Array(bytData, true), ToUInt32Array(bytKey, false)), false)); 
    } 
    public static string Decrypt(string source, string key) 
    { 
        if (source.Length == 0) 
        { 
            return ""; 
        } 
        // reverse 
        System.Text.Encoding encoder = System.Text.Encoding.UTF8; 
        byte[] bytData = System.Convert.FromBase64String(source); 
        byte[] bytKey = encoder.GetBytes(key);

return base64Decode(encoder.GetString(ToByteArray(Decrypt(ToUInt32Array(bytData, false), ToUInt32Array(bytKey, false)), true)));
}

    private static UInt32[] Encrypt(UInt32[] v, UInt32[] k)
    {
        Int32 n = v.Length - 1;
        if (n < 1)
        {
            return v;
        }
        if (k.Length < 4)
        {
            UInt32[] Key = new UInt32[4];
            k.CopyTo(Key, 0);
            k = Key;
        }
        UInt32 z = v[n], y = v[0], delta = 0x9E3779B9, sum = 0, e;
        Int32 p, q = 6 + 52 / (n + 1);
        while (q-- > 0)
        {
            sum = unchecked(sum + delta);
            e = sum >> 2 & 3;
            for (p = 0; p < n; p++)
            {
                y = v[p + 1];
                z = unchecked(v[p] += (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
            }
            y = v[0];
            z = unchecked(v[n] += (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
        }
        return v;
    }

    private static UInt32[] Decrypt(UInt32[] v, UInt32[] k)
    {
        Int32 n = v.Length - 1;
        if (n < 1)
        {
            return v;
        }
        if (k.Length < 4)
        {
            UInt32[] Key = new UInt32[4];
            k.CopyTo(Key, 0);
            k = Key;
        }
        UInt32 z = v[n], y = v[0], delta = 0x9E3779B9, sum, e;
        Int32 p, q = 6 + 52 / (n + 1);
        sum = unchecked((UInt32)(q * delta));
        while (sum != 0)
        {
            e = sum >> 2 & 3;
            for (p = n; p > 0; p--)
            {
                z = v[p - 1];
                y = unchecked(v[p] -= (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
            }
            z = v[n];
            y = unchecked(v[0] -= (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
            sum = unchecked(sum - delta);
        }
        return v;
    }

    private static UInt32[] ToUInt32Array(Byte[] Data, Boolean IncludeLength)
    {
        Int32 n = (((Data.Length & 3) == 0) ? (Data.Length >> 2) : ((Data.Length >> 2) + 1));
        UInt32[] Result;
        if (IncludeLength)
        {
            Result = new UInt32[n + 1];
            Result[n] = (UInt32)Data.Length;
        }
        else
        {
            Result = new UInt32[n];
        }
        n = Data.Length;
        for (Int32 i = 0; i < n; i++)
        {
            Result[i >> 2] |= (UInt32)Data[i] << ((i & 3) << 3);
        }
        return Result;
    }

    private static Byte[] ToByteArray(UInt32[] Data, Boolean IncludeLength)
    {
        Int32 n;
        if (IncludeLength)
        {
            n = (Int32)Data[Data.Length - 1];
        }
        else
        {
            n = Data.Length << 2;
        }
        Byte[] Result = new Byte[n];
        for (Int32 i = 0; i < n; i++)
        {
            Result[i] = (Byte)(Data[i >> 2] >> ((i & 3) << 3));
        }
        return Result;
    }

    public static string base64Decode(string data)
    {
        try
        {
            var encoder = System.Text.Encoding.UTF8;

            byte[] todecode_byte = Convert.FromBase64String(data);
            return encoder.GetString(todecode_byte);
        }
        catch (Exception e)
        {
            throw new Exception("Error in base64Decode" + e.Message);
        }
    }

    public static string base64Encode(string data)
    {
        try
        {
            byte[] encData_byte = new byte[data.Length];
            encData_byte = System.Text.Encoding.UTF8.GetBytes(data);
            string encodedData = Convert.ToBase64String(encData_byte);
            return encodedData;
        }
        catch (Exception e)
        {
            throw new Exception("Error in base64Encode" + e.Message);
        }
    }

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c#和avascript加解密之间的互转代码分享