[Release]C# Packet Encryption/Decryption 100% Functional

Zektor · 03/22/2011, 05:27

Enjoy, (Also, I've had some references from old Enc/Dec functions and improved some)
-Functions written/converted into C# language

To use:
Call DecryptData first,
then call CryptBody,
and then play around with your packets; once done simply re-encrypt it again (no need to use CryptBody again since a packet w/ 0x00 as key can be sent without problems).

C# Version:

Code:

        public static byte[] CryptBody(byte[] PacketData, int len)
        {
            if (len <= 14 || PacketData[14] == 0x00)
            {
                return PacketData;
            }
            byte[] DecryptedData = new byte[len];
            ulong key = PacketData[14];
            for (int i = 0; i < 12; i++)
            {
                DecryptedData[i] = (byte)(PacketData[i]);
            }
            for (int i = 12; i < len; i++)
            {
                DecryptedData[i] = (byte)(PacketData[i] ^ key);
            }
            return DecryptedData;
        }

        public static byte[] DecryptData(byte[] PacketData, int len)
        {
            ulong DwordTableVal = 0xFFFFFFFF;
            ulong ByteTableVal = 0;
            ulong DecryptionFlagByte = (ulong)PacketData[4] ^ 0x19;
            ulong CurrentByte = 0;
            byte[] DecryptedData = new byte[len];
            for (int i = 0; i < len; i++)
            {
                CurrentByte = (PacketData[i] ^ DwordTableVal) & 0x0FF;
                DwordTableVal = (DwordTableVal >> 8) ^ Table[CurrentByte];
                ByteTableVal = ByteTable[(i & 0x0FF)];
                DecryptedData[i] = (byte)((ByteTableVal ^ PacketData[i]) ^ DecryptionFlagByte);
            }
            return DecryptedData;
        }

        public static void CalculateChecksum(byte[] PacketData, ulong DwordVal)
        {
            int Counter = 0;
            ulong Byte1 = 0, Byte2 = 0, Byte3 = 0, Byte4 = 0;

            DwordVal = ~DwordVal;
            Byte1 = (DwordVal & 0x000000FF);
            Byte2 = (DwordVal & 0x0000FF00) >> 8;
            Byte3 = (DwordVal & 0x00FF0000) >> 16;
            Byte4 = (DwordVal & 0xFF000000) >> 24;

            PacketData[Counter++] = (byte)Byte4;
            PacketData[Counter++] = (byte)Byte3;
            PacketData[Counter++] = (byte)Byte2;
            PacketData[Counter++] = (byte)Byte1;
        }

        public static byte[] EncryptData(byte[] PacketData, ulong FlagByte)
        {
            ulong EncryptedByte = 0;
            ulong DwordTableVal = 0;
            ulong DwordVal = 0xFFFFFFFF;
            int Counter = 4;

            byte[] EncryptedData = new byte[PacketData.Length];

            for (int i = 0; i < PacketData.Length - 4; i++)
            {
                EncryptedByte = ((ByteTable[(Counter & 0x0FF)]) ^ FlagByte) ^ PacketData[Counter];
                EncryptedData[Counter++] = (byte)EncryptedByte;
                DwordTableVal = (EncryptedByte ^ DwordVal) & 0x0FF;
                DwordVal = (DwordVal >> 8) ^ Table[DwordTableVal];
            }

            CalculateChecksum(EncryptedData, DwordVal);
            return EncryptedData;
        }
        public static byte[] EncryptData(byte[] PacketData, int len, ulong FlagByte)
        {
            ulong EncryptedByte = 0;
            ulong DwordTableVal = 0;
            ulong DwordVal = 0xFFFFFFFF;
            int Counter = 4;

            byte[] EncryptedData = new byte[len];

            for (int i = 0; i < len - 4; i++)
            {
                EncryptedByte = ((ByteTable[(Counter & 0x0FF)]) ^ FlagByte) ^ PacketData[Counter];
                EncryptedData[Counter++] = (byte)EncryptedByte;
                DwordTableVal = (EncryptedByte ^ DwordVal) & 0x0FF;
                DwordVal = (DwordVal >> 8) ^ Table[DwordTableVal];
            }

            CalculateChecksum(EncryptedData, DwordVal);
            return EncryptedData;
        }
        #region lookup tables
        private static ulong[] Table = {
                            0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
                            0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
                            0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
                            0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
                            0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
                            0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
                            0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 
                            0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 
                            0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 
                            0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 
                            0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 
                            0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 
                            0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 
                            0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 
                            0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 
                            0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 
                            0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 
                            0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 
                            0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 
                            0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 
                            0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 
                            0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 
                            0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 
                            0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 
                            0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 
                            0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 
                            0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 
                            0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 
                            0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 
                            0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 
                            0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 
                            0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 
                            0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 
                            0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 
                            0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 
                            0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 
                            0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 
                            0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 
                            0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 
                            0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 
                            0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
                            0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 
                            0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D, 0x00000000, 0x00007325,
                            0x00A550DC, 0x0044B4E0, 0x00A55124, 0x0044B890 };

        private static ulong[] ByteTable = { 
                            0x00, 0x96, 0x2C, 0xBA, 0x19, 0x8F, 0x35, 0xA3, 0x32, 0xA4, 0x1E, 0x88,
                            0x2B, 0xBD, 0x07, 0x91, 0x64, 0xF2, 0x48, 0xDE, 0x7D, 0xEB, 0x51, 0xC7,
                            0x56, 0xC0, 0x7A, 0xEC, 0x4F, 0xD9, 0x63, 0xF5, 0xC8, 0x5E, 0xE4, 0x72,
                            0xD1, 0x47, 0xFD, 0x6B, 0xFA, 0x6C, 0xD6, 0x40, 0xE3, 0x75, 0xCF, 0x59,
                            0xAC, 0x3A, 0x80, 0x16, 0xB5, 0x23, 0x99, 0x0F, 0x9E, 0x08, 0xB2, 0x24,
                            0x87, 0x11, 0xAB, 0x3D, 0x90, 0x06, 0xBC, 0x2A, 0x89, 0x1F, 0xA5, 0x33,
                            0xA2, 0x34, 0x8E, 0x18, 0xBB, 0x2D, 0x97, 0x01, 0xF4, 0x62, 0xD8, 0x4E,
                            0xED, 0x7B, 0xC1, 0x57, 0xC6, 0x50, 0xEA, 0x7C, 0xDF, 0x49, 0xF3, 0x65,
                            0x58, 0xCE, 0x74, 0xE2, 0x41, 0xD7, 0x6D, 0xFB, 0x6A, 0xFC, 0x46, 0xD0,
                            0x73, 0xE5, 0x5F, 0xC9, 0x3C, 0xAA, 0x10, 0x86, 0x25, 0xB3, 0x09, 0x9F,
                            0x0E, 0x98, 0x22, 0xB4, 0x17, 0x81, 0x3B, 0xAD, 0x20, 0xB6, 0x0C, 0x9A,
                            0x39, 0xAF, 0x15, 0x83, 0x12, 0x84, 0x3E, 0xA8, 0x0B, 0x9D, 0x27, 0xB1,
                            0x44, 0xD2, 0x68, 0xFE, 0x5D, 0xCB, 0x71, 0xE7, 0x76, 0xE0, 0x5A, 0xCC, 
                            0x6F, 0xF9, 0x43, 0xD5, 0xE8, 0x7E, 0xC4, 0x52, 0xF1, 0x67, 0xDD, 0x4B, 
                            0xDA, 0x4C, 0xF6, 0x60, 0xC3, 0x55, 0xEF, 0x79, 0x8C, 0x1A, 0xA0, 0x36,
                            0x95, 0x03, 0xB9, 0x2F, 0xBE, 0x28, 0x92, 0x04, 0xA7, 0x31, 0x8B, 0x1D, 
                            0xB0, 0x26, 0x9C, 0x0A, 0xA9, 0x3F, 0x85, 0x13, 0x82, 0x14, 0xAE, 0x38, 
                            0x9B, 0x0D, 0xB7, 0x21, 0xD4, 0x42, 0xF8, 0x6E, 0xCD, 0x5B, 0xE1, 0x77, 
                            0xE6, 0x70, 0xCA, 0x5C, 0xFF, 0x69, 0xD3, 0x45, 0x78, 0xEE, 0x54, 0xC2, 
                            0x61, 0xF7, 0x4D, 0xDB, 0x4A, 0xDC, 0x66, 0xF0, 0x53, 0xC5, 0x7F, 0xE9,
                            0x1C, 0x8A, 0x30, 0xA6, 0x05, 0x93, 0x29, 0xBF, 0x2E, 0xB8, 0x02, 0x94, 
                            0x37, 0xA1, 0x1B, 0x8D, 0x00, 0x25, 0xDC, 0xE0, 0x24, 0x90 };
        #endregion
    }
}

C++ Version:

Code:

unsigned long Table[] = { 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1 , 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661 , 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D, 0x00000000, 0x00007325, 0x00A550DC, 0x0044B4E0, 0x00A55124 , 0x0044B890};
long ByteTable[] = {0x00, 0x96, 0x2C, 0xBA, 0x19, 0x8F, 0x35, 0xA3, 0x32, 0xA4, 0x1E, 0x88, 0x2B, 0xBD, 0x07, 0x91, 0x64, 0xF2, 0x48, 0xDE, 0x7D, 0xEB, 0x51, 0xC7, 0x56, 0xC0, 0x7A, 0xEC, 0x4F, 0xD9, 0x63, 0xF5, 0xC8, 0x5E, 0xE4, 0x72, 0xD1, 0x47, 0xFD, 0x6B, 0xFA, 0x6C, 0xD6, 0x40, 0xE3, 0x75, 0xCF, 0x59, 0xAC, 0x3A, 0x80, 0x16, 0xB5, 0x23, 0x99, 0x0F, 0x9E, 0x08, 0xB2, 0x24, 0x87, 0x11, 0xAB, 0x3D, 0x90, 0x06, 0xBC, 0x2A, 0x89, 0x1F, 0xA5, 0x33, 0xA2, 0x34, 0x8E, 0x18, 0xBB, 0x2D, 0x97, 0x01, 0xF4, 0x62, 0xD8, 0x4E, 0xED, 0x7B, 0xC1, 0x57, 0xC6, 0x50, 0xEA, 0x7C, 0xDF, 0x49, 0xF3, 0x65, 0x58, 0xCE, 0x74, 0xE2, 0x41, 0xD7, 0x6D, 0xFB, 0x6A, 0xFC, 0x46, 0xD0, 0x73, 0xE5, 0x5F, 0xC9, 0x3C, 0xAA, 0x10, 0x86, 0x25, 0xB3, 0x09, 0x9F, 0x0E, 0x98, 0x22, 0xB4, 0x17, 0x81, 0x3B, 0xAD, 0x20, 0xB6, 0x0C, 0x9A, 0x39, 0xAF, 0x15, 0x83, 0x12, 0x84, 0x3E, 0xA8, 0x0B, 0x9D, 0x27, 0xB1, 0x44, 0xD2, 0x68, 0xFE, 0x5D, 0xCB, 0x71, 0xE7, 0x76, 0xE0, 0x5A, 0xCC, 0x6F, 0xF9, 0x43, 0xD5, 0xE8, 0x7E, 0xC4, 0x52, 0xF1 , 0x67, 0xDD, 0x4B, 0xDA, 0x4C, 0xF6, 0x60, 0xC3, 0x55, 0xEF, 0x79, 0x8C, 0x1A, 0xA0, 0x36, 0x95, 0x03, 0xB9, 0x2F, 0xBE, 0x28, 0x92, 0x04, 0xA7, 0x31, 0x8B, 0x1D, 0xB0, 0x26, 0x9C, 0x0A, 0xA9, 0x3F, 0x85, 0x13, 0x82, 0x14, 0xAE, 0x38, 0x9B, 0x0D, 0xB7, 0x21, 0xD4, 0x42, 0xF8, 0x6E, 0xCD, 0x5B, 0xE1, 0x77, 0xE6, 0x70, 0xCA, 0x5C, 0xFF, 0x69, 0xD3, 0x45, 0x78, 0xEE, 0x54, 0xC2, 0x61, 0xF7, 0x4D, 0xDB, 0x4A, 0xDC, 0x66, 0xF0, 0x53, 0xC5, 0x7F, 0xE9, 0x1C, 0x8A, 0x30, 0xA6, 0x05, 0x93, 0x29, 0xBF, 0x2E, 0xB8, 0x02, 0x94, 0x37, 0xA1, 0x1B, 0x8D, 0x00, 0x25, 0xDC, 0xE0, 0x24, 0x90};
void DecryptData(unsigned char * PacketData, unsigned char * DecryptedData, int Length)
{
	unsigned long DwordTableVal = 0xFFFFFFFF; 
	long ByteTableVal = 0; 
    long DecryptionFlagByte = PacketData[4] ^ 0x19; 
    long CurrentByte = 0;
	for(int i = 0; i < Length; i++) 
	{
        CurrentByte = (PacketData[i] ^ DwordTableVal) & 0x0FF;
        DwordTableVal = (DwordTableVal >> 8) ^ Table[CurrentByte]; 
        ByteTableVal = ByteTable[(i & 0x0FF)];
        DecryptedData[i] = (ByteTableVal ^ PacketData[i]) ^ DecryptionFlagByte;
	}
}
void CalculateChecksum(unsigned char * PacketData, unsigned long DwordVal)
{
	int Counter = 0;
	long Byte1, Byte2, Byte3, Byte4; 
	Byte1 = Byte2 = Byte3 = Byte4 = 0;

	DwordVal = ~DwordVal;
	Byte1 = (DwordVal & 0x000000FF); 
	Byte2 = (DwordVal & 0x0000FF00) >> 8; 
	Byte3 = (DwordVal & 0x00FF0000) >> 16;
	Byte4 = (DwordVal & 0xFF000000) >> 24;
	
	PacketData[Counter++] = Byte4;
	PacketData[Counter++] = Byte3;
	PacketData[Counter++] = Byte2;
	PacketData[Counter++] = Byte1;
}
void EncryptData(unsigned char * PacketData, int Length, long FlagByte)
{
	long EncryptedByte = 0; 
	unsigned long DwordTableVal = 0;
	unsigned long DwordVal = 0xFFFFFFFF;
	int Counter = 4;

	for(int i = 0; i < Length; i++) 
	{
		EncryptedByte = ((ByteTable[(Counter & 0x0FF)]) ^ FlagByte) ^ PacketData[Counter]; 
		PacketData[Counter++] = EncryptedByte;
		DwordTableVal = (EncryptedByte ^ DwordVal) & 0x0FF; 
		DwordVal = (DwordVal >> 8) ^ Table[DwordTableVal];
	}
	CalculateChecksum(PacketData, DwordVal);
}
void CryptBody(unsigned char * PacketData, int len)
{
    if (len <= 14 || PacketData[14] == 0x00)
    {
    }
	else
	{
		unsigned char* DecryptedData = new unsigned char[len];
		unsigned long key = PacketData[14];
		for (int i = 0; i < 12; i++)
		{
			DecryptedData[i] = (byte)(PacketData[i]);
			PacketData[i] = DecryptedData[i];
		}
		for (int i = 12; i < len; i++)
		{
			DecryptedData[i] = (byte)(PacketData[i] ^ key);
			PacketData[i] = DecryptedData[i];
		}
	}
}

Enjoy!

~~silkbotter~~ · 03/22/2011, 17:44

a thanks for the release.
even that i won't use it since i kinda retired, I'm glad to see some decent people releasing some new things that will help improving private servers

en[DEV]er · 03/22/2011, 19:28

hey dude,i m a litle nb , u can explain better? how can use this code?

Zektor · 03/22/2011, 20:05

Just hook the game's winsock functions and call this onto the packet buffer. I'll probably release a sample later on

Edit:
Added C++ version

en[DEV]er · 03/24/2011, 01:25

Quote:

Originally Posted by Zektor

Just hook the game's winsock functions and call this onto the packet buffer. I'll probably release a sample later on

Edit:
Added C++ version

if you can make a video explaining and demonstrating how to use, I would be very grateful!

KChildheart · 03/24/2011, 01:38

Not that he won't help, but if you don't understand how to use it, you probably shouldn't be using it >.<

BioNicX · 11/06/2011, 18:56

Quote:

Originally Posted by en[DEV]er

if you can make a video explaining and demonstrating how to use, I would be very grateful!

First google what C++ is, then come back here.

dekaronfan · 11/06/2011, 21:10

OFFTOPIC:

Quote:

Originally Posted by BioNicX

First google what C++ is, then come back here.

People are so rude nowadays on this forum.

ONTOPIC:

Thanks for your effort making this.

*JayKay* · 11/07/2011, 00:00

Quote:

Originally Posted by Zektor

Enjoy, (Also, I've had some references from old Enc/Dec functions and improved some)
-Functions written/converted into C# language

To use:
Call DecryptData first,
then call CryptBody,
and then play around with your packets; once done simply re-encrypt it again (no need to use CryptBody again since a packet w/ 0x00 as key can be sent without problems).

C# Version:

Not know which end of the code and please explain.

BioNicX · 11/07/2011, 00:16

Quote:

Originally Posted by dekaronfan

OFFTOPIC:

People are so rude nowadays on this forum.

ONTOPIC:

Thanks for your effort making this.

Im not being rude,im taking a revenge

. You don't know the story behind it.

freeskier4lif3 · 11/07/2011, 00:40

Necro much?

~~DekaronSo~~ · 11/07/2011, 09:30

Quote:

Originally Posted by en[DEV]er

hey dude,i m a litle nb , u can explain better? how can use this code?

dude , i think it is not for us , it is for professional guys .

KraKhaVario · 11/07/2011, 09:46

c++ and c# are programming languages, you'll need a programming environment to compile it (i.e. visual studio or eclipse)

basically the code is the sourcecode to a library, executable or function.
like people above already stated, if you didnt know this before, I wouldnt recommend you trying it unless u want to learn more about programming
it'll take some time

theoners · 11/07/2011, 19:11

good work man tnx

augustabyron · 11/08/2011, 10:44

this use for server.exe or client.exe or both ?