C# 3DES加密及弱密鑰處理

3DES加密,以及避過.net弱密鑰檢測。代碼根據網上代碼進行的修改

private static byte[] ThreeDES(byte[] key, byte[] str)
        {
            TripleDESCryptoServiceProvider tdsc = new TripleDESCryptoServiceProvider();
            tdsc.Padding = PaddingMode.None;

            byte[] IV = { 0xB0, 0xA2, 0xB8, 0xA3, 0xDA, 0xCC, 0xDA, 0xCC };
            //指定密匙長度，默認爲192位
            tdsc.KeySize = 128;
            //使用指定的key和IV（加密向量）
            Type t = Type.GetType("System.Security.Cryptography.CryptoAPITransformMode");
            object obj = t.GetField("Encrypt", BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly).GetValue(t);
            MethodInfo mi = tdsc.GetType().GetMethod("_NewEncryptor", BindingFlags.Instance | BindingFlags.NonPublic);
            ICryptoTransform desCrypt = (ICryptoTransform)mi.Invoke(tdsc, new object[] { key, CipherMode.ECB, null, 0, obj });
            tdsc.IV = IV;
            //加密模式，偏移
            tdsc.Mode = CipherMode.ECB;
            
            //進行加密轉換運算
            //ICryptoTransform ct = tdsc.CreateDecryptor();
            //8很關鍵，加密結果是8字節數組
            byte[] results = desCrypt.TransformFinalBlock(str, 0, 8);

            return results;
        }