[Release] Decrypting skilldata_enc.txt in .NET

DaxterSoul · 08/21/2013, 22:07

Just thought I could share this with you guys.
You can use this Class to Decrypt/Encrypt skilldata_enc.txt using .NET

Code:

public class Decrypter
                {
                    #region HashTables

                    private static byte[] Hash_Table_1 = new byte[] 
        {
            0x07, 0x83, 0xBC, 0xEE, 0x4B, 0x79, 0x19, 0xB6, 0x2A, 0x53, 0x4F, 0x3A, 0xCF, 0x71, 0xE5, 0x3C, 
            0x2D, 0x18, 0x14, 0xCB, 0xB6, 0xBC, 0xAA, 0x9A, 0x31, 0x42, 0x3A, 0x13, 0x42, 0xC9, 0x63, 0xFC, 
            0x54, 0x1D, 0xF2, 0xC1, 0x8A, 0xDD, 0x1C, 0xB3, 0x52, 0xEA, 0x9B, 0xD7, 0xC4, 0xBA, 0xF8, 0x12, 
            0x74, 0x92, 0x30, 0xC9, 0xD6, 0x56, 0x15, 0x52, 0x53, 0x60, 0x11, 0x33, 0xC5, 0x9D, 0x30, 0x9A, 
            0xE5, 0xD2, 0x93, 0x99, 0xEB, 0xCF, 0xAA, 0x79, 0xE3, 0x78, 0x6A, 0xB9, 0x02, 0xE0, 0xCE, 0x8E, 
            0xF3, 0x63, 0x5A, 0x73, 0x74, 0xF3, 0x72, 0xAA, 0x2C, 0x9F, 0xBB, 0x33, 0x91, 0xDE, 0x5F, 0x91, 
            0x66, 0x48, 0xD1, 0x7A, 0xFD, 0x3F, 0x91, 0x3E, 0x5D, 0x22, 0xEC, 0xEF, 0x7C, 0xA5, 0x43, 0xC0, 
            0x1D, 0x4F, 0x60, 0x7F, 0x0B, 0x4A, 0x4B, 0x2A, 0x43, 0x06, 0x46, 0x14, 0x45, 0xD0, 0xC5, 0x83, 
            0x92, 0xE4, 0x16, 0xD0, 0xA3, 0xA1, 0x13, 0xDA, 0xD1, 0x51, 0x07, 0xEB, 0x7D, 0xCE, 0xA5, 0xDB, 
            0x78, 0xE0, 0xC1, 0x0B, 0xE5, 0x8E, 0x1C, 0x7C, 0xB4, 0xDF, 0xED, 0xB8, 0x53, 0xBA, 0x2C, 0xB5, 
            0xBB, 0x56, 0xFB, 0x68, 0x95, 0x6E, 0x65, 0x00, 0x60, 0xBA, 0xE3, 0x00, 0x01, 0x00, 0x00, 0x00, 
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
            0x00, 0x00, 0x00, 0x00, 0x9C, 0xB5, 0xD5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2E, 0x3F, 0x41, 0x56, 
            0x43, 0x45, 0x53, 0x63, 0x72, 0x69, 0x70, 0x74, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
            0x64, 0xBB, 0xE3, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
        };

                    private static byte[] Hash_Table_2 = new byte[] 
        {
            0x0D, 0x05, 0x90, 0x41, 0xF9, 0xD0, 0x65, 0xBF, 0xF9, 0x0B, 0x15, 0x93, 0x80, 0xFB, 0x01, 0x02, 
            0xB6, 0x08, 0xC4, 0x3C, 0xC1, 0x49, 0x94, 0x4D, 0xCE, 0x1D, 0xFD, 0x69, 0xEA, 0x19, 0xC9, 0x57, 
            0x9C, 0x4D, 0x84, 0x62, 0xE3, 0x67, 0xF9, 0x87, 0xF4, 0xF9, 0x93, 0xDA, 0xE5, 0x15, 0xF1, 0x4C, 
            0xA4, 0xEC, 0xBC, 0xCF, 0xDD, 0xB3, 0x6F, 0x04, 0x3D, 0x70, 0x1C, 0x74, 0x21, 0x6B, 0x00, 0x71, 
            0x31, 0x7F, 0x54, 0xB3, 0x72, 0x6C, 0xAA, 0x42, 0xC1, 0x78, 0x61, 0x3E, 0xD5, 0xF2, 0xE1, 0x27, 
            0x36, 0x71, 0x3A, 0x25, 0x36, 0x57, 0xD1, 0xF8, 0x70, 0x86, 0xBD, 0x0E, 0x58, 0xB3, 0x76, 0x6D, 
            0xC3, 0x50, 0xF6, 0x6C, 0xA0, 0x10, 0x06, 0x64, 0xA2, 0xD6, 0x2C, 0xD4, 0x27, 0x30, 0xA5, 0x36, 
            0x1C, 0x1E, 0x3E, 0x58, 0x9D, 0x59, 0x76, 0x9D, 0xA7, 0x42, 0x5A, 0xF0, 0x00, 0xBC, 0x69, 0x31, 
            0x40, 0x1E, 0xFA, 0x09, 0x1D, 0xE7, 0xEE, 0xE4, 0x54, 0x89, 0x36, 0x7C, 0x67, 0xC8, 0x65, 0x22, 
            0x7E, 0xA3, 0x60, 0x44, 0x1E, 0xBC, 0x68, 0x6F, 0x15, 0x2A, 0xFD, 0x9D, 0x3F, 0x36, 0x6B, 0x28, 
            0x06, 0x67, 0xFE, 0xC6, 0x49, 0x6B, 0x9B, 0x3F, 0x80, 0x2A, 0xD2, 0xD4, 0xD3, 0x20, 0x1B, 0x96, 
            0xF4, 0xD2, 0xCA, 0x8C, 0x74, 0xEE, 0x0B, 0x6A, 0xE1, 0xE9, 0xC6, 0xD2, 0x6E, 0x33, 0x63, 0xC0, 
            0xE9, 0xD0, 0x37, 0xA9, 0x3C, 0xF7, 0x18, 0xF2, 0x4A, 0x74, 0xEC, 0x41, 0x61, 0x7A, 0x19, 0x47, 
            0x8F, 0xA0, 0xBB, 0x94, 0x8F, 0x3D, 0x11, 0x11, 0x26, 0xCF, 0x69, 0x18, 0x1B, 0x2C, 0x87, 0x6D, 
            0xB3, 0x22, 0x6C, 0x78, 0x41, 0xCC, 0xC2, 0x84, 0xC5, 0xCB, 0x01, 0x6A, 0x37, 0x00, 0x01, 0x65, 
            0x4F, 0xA7, 0x85, 0x85, 0x15, 0x59, 0x05, 0x67, 0xF2, 0x4F, 0xAB, 0xB7, 0x88, 0xFA, 0x69, 0x24, 
            0x9E, 0xC6, 0x7B, 0x3F, 0xD5, 0x0E, 0x4D, 0x7B, 0xFB, 0xB1, 0x21, 0x3C, 0xB0, 0xC0, 0xCB, 0x2C, 
            0xAA, 0x26, 0x8D, 0xCC, 0xDD, 0xDA, 0xC1, 0xF8, 0xCA, 0x7F, 0x6A, 0x3F, 0x2A, 0x61, 0xE7, 0x60, 
            0x5C, 0xCE, 0xD3, 0x4C, 0xAC, 0x45, 0x40, 0x62, 0xEA, 0x51, 0xF1, 0x66, 0x5D, 0x2C, 0x45, 0xD6, 
            0x8B, 0x7D, 0xCE, 0x9C, 0xF5, 0xBB, 0xF7, 0x52, 0x24, 0x1A, 0x13, 0x02, 0x2B, 0x00, 0xBB, 0xA1, 
            0x8F, 0x6E, 0x7A, 0x33, 0xAD, 0x5F, 0xF4, 0x4A, 0x82, 0x76, 0xAB, 0xDE, 0x80, 0x98, 0x8B, 0x26, 
            0x4F, 0x33, 0xD8, 0x68, 0x1E, 0xD9, 0xAE, 0x06, 0x6B, 0x7E, 0xA9, 0x95, 0x67, 0x60, 0xEB, 0xE8, 
            0xD0, 0x7D, 0x07, 0x4B, 0xF1, 0xAA, 0x9A, 0xC5, 0x29, 0x93, 0x9D, 0x5C, 0x92, 0x3F, 0x15, 0xDE, 
            0x48, 0xF1, 0xCA, 0xEA, 0xC9, 0x78, 0x3C, 0x28, 0x7E, 0xB0, 0x46, 0xD3, 0x71, 0x6C, 0xD7, 0xBD, 
            0x2C, 0xF7, 0x25, 0x2F, 0xC7, 0xDD, 0xB4, 0x6D, 0x35, 0xBB, 0xA7, 0xDA, 0x3E, 0x3D, 0xA7, 0xCA, 
            0xBD, 0x87, 0xDD, 0x9F, 0x22, 0x3D, 0x50, 0xD2, 0x30, 0xD5, 0x14, 0x5B, 0x8F, 0xF4, 0xAF, 0xAA, 
            0xA0, 0xFC, 0x17, 0x3D, 0x33, 0x10, 0x99, 0xDC, 0x76, 0xA9, 0x40, 0x1B, 0x64, 0x14, 0xDF, 0x35, 
            0x68, 0x66, 0x5B, 0x49, 0x05, 0x33, 0x68, 0x26, 0xC8, 0xBA, 0xD1, 0x8D, 0x39, 0x2B, 0xFB, 0x3E, 
            0x24, 0x52, 0x2F, 0x9A, 0x69, 0xBC, 0xF2, 0xB2, 0xAC, 0xB8, 0xEF, 0xA1, 0x17, 0x29, 0x2D, 0xEE, 
            0xF5, 0x23, 0x21, 0xEC, 0x81, 0xC7, 0x5B, 0xC0, 0x82, 0xCC, 0xD2, 0x91, 0x9D, 0x29, 0x93, 0x0C, 
            0x9D, 0x5D, 0x57, 0xAD, 0xD4, 0xC6, 0x40, 0x93, 0x8D, 0xE9, 0xD3, 0x35, 0x9D, 0xC6, 0xD3, 0x00, 
        };

                    #endregion

                    public static string Decrypt(Stream Input)
                    {
                        int encrypted = 0;
                        int key = 0x8c1f;
                        byte buff = 0;
                        byte[] buffer = null;
                        long fileLen = 0;

                        BinaryReader reader = new BinaryReader(Input);

                        try
                        {
                            fileLen = Input.Length;
                            buffer = new byte[fileLen];

                            //check buffer
                            if (buffer == null)
                            {
                                reader.Close();
                                reader.Dispose();

                                return string.Empty;
                            }


                            reader.BaseStream.Read(buffer, 0, Convert.ToInt32(fileLen));
                            reader.Close();

                            //Check if encrypted
                            if (buffer[0] == 0xE2 && buffer[1] == 0xB0)
                                encrypted = 1;

                            //Decrypt
                            for (long i = 0; i < fileLen; i++)
                            {
                                buff = (byte)(Hash_Table_1[key % 0xA7] - Hash_Table_2[key % 0x1EF]);
                                //Console.WriteLine("a:\t" + a + "\tb:\t" + b + "\tbuff:\t"+  buff);

                                ++key;
                                if (encrypted == 1)
                                    buffer[i] += buff;
                                else
                                    buffer[i] -= buff;
                            }
                            reader.Dispose();

                            return ByteArrayToString(buffer);


                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.Message);
                            return string.Empty;
                        }
                    }

                    private static string ByteArrayToString(byte[] arr)
                    {
                        //System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();

                        //Convert Unicode UCS-2 Little-Endian (BMP of ISO 10646) (Codepage:1200) -> ASCII
                        arr = System.Text.Encoding.Convert(Encoding.GetEncoding(1200), Encoding.ASCII, arr);
                        return System.Text.Encoding.ASCII.GetString(arr);
                    }

                    private static byte[] StringToByteArray(string str)
                    {
                        System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
                        return enc.GetBytes(str);
                    }
                }