mirror of
https://github.com/sebastian-heinz/mhf-server.git
synced 2025-04-03 13:28:30 +08:00
401 lines
39 KiB
C#
401 lines
39 KiB
C#
using System;
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using System.Collections.Generic;
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using Arrowgene.Services.Buffers;
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using Arrowgene.Services.Logging;
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using Mhf.Server.Common;
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using Mhf.Server.Logging;
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using Mhf.Server.Setting;
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namespace Mhf.Server.Packet
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{
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public class PacketFactory
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{
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public const int PacketHeaderSize = 14;
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public const int InitPacketSize = 8;
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public const uint CryptoInit = 995117;
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public static byte[] EncryptKey = new byte[]
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{
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0x90, 0x51, 0x26, 0x25, 0x04, 0xBF, 0xCF, 0x4C, 0x92, 0x02, 0x52, 0x7A, 0x70, 0x1A, 0x41, 0x88, 0x8C, 0xC2,
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0xCE, 0xB8, 0xF6, 0x57, 0x7E, 0xBA, 0x83, 0x63, 0x2C, 0x24, 0x9A, 0x67, 0x86, 0x0C, 0xBE, 0x72, 0xFD, 0xB6,
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0x7B, 0x79, 0xB0, 0x22, 0x5A, 0x60, 0x5C, 0x4F, 0x49, 0xE2, 0x0E, 0xF5, 0x3A, 0x81, 0xAE, 0x11, 0x6B, 0xF0,
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0xA1, 0x01, 0xE8, 0x65, 0x8D, 0x5B, 0xDC, 0xCC, 0x93, 0x18, 0xB3, 0xAB, 0x77, 0xF7, 0x8E, 0xEC, 0xEF, 0x05,
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0x00, 0xCA, 0x4E, 0xA7, 0xBC, 0xB5, 0x10, 0xC6, 0x6C, 0xC0, 0xC4, 0xE5, 0x87, 0x3F, 0xC1, 0x82, 0x29, 0x96,
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0x45, 0x73, 0x07, 0xCB, 0x43, 0xF9, 0xF3, 0x08, 0x89, 0xD0, 0x99, 0x6A, 0x3B, 0x37, 0x19, 0xD4, 0x40, 0xEA,
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0xD7, 0x85, 0x16, 0x66, 0x1E, 0x9C, 0x39, 0xBB, 0xEE, 0x4A, 0x03, 0x8A, 0x36, 0x2D, 0x13, 0x1D, 0x56, 0x48,
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0xC7, 0x0D, 0x59, 0xB2, 0x44, 0xA3, 0xFE, 0x8B, 0x32, 0x1B, 0x84, 0xA0, 0x2E, 0x62, 0x17, 0x42, 0xB9, 0x9B,
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0x2B, 0x75, 0xD8, 0x1C, 0x3C, 0x4D, 0x76, 0x27, 0x6E, 0x28, 0xD3, 0x33, 0xC3, 0x21, 0xAF, 0x34, 0x23, 0xDD,
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0x68, 0x9F, 0xF1, 0xAD, 0xE1, 0xB4, 0xE7, 0xA6, 0x74, 0x15, 0x4B, 0xFA, 0x3D, 0x5F, 0x7C, 0xDA, 0x2F, 0x0A,
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0xE3, 0x7D, 0xC8, 0xB7, 0x12, 0x6F, 0x9E, 0xA9, 0x14, 0x53, 0x97, 0x8F, 0x64, 0xF4, 0xF8, 0xA2, 0xA4, 0x2A,
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0xD2, 0x47, 0x9D, 0x71, 0xC5, 0xE9, 0x06, 0x98, 0x20, 0x54, 0x80, 0xAA, 0xF2, 0xAC, 0x50, 0xD6, 0x7F, 0xD9,
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0xC9, 0xCD, 0x69, 0x46, 0x6D, 0x30, 0xB1, 0x58, 0x0B, 0x55, 0xD1, 0x5D, 0xD5, 0xBD, 0x31, 0xDE, 0xA5, 0xE4,
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0x91, 0x0F, 0x61, 0x38, 0xDF, 0xA8, 0xE6, 0x3E, 0x1F, 0x35, 0xED, 0xDB, 0x94, 0xEB, 0x09, 0x5E, 0x95, 0xFB,
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0xFC, 0xE0, 0x78, 0xFF
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};
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public static byte[] DecryptKey = new byte[]
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{
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0x48, 0x37, 0x09, 0x76, 0x04, 0x47, 0xCC, 0x5C, 0x61, 0xF8, 0xB3, 0xE0, 0x1F, 0x7F, 0x2E, 0xEB, 0x4E, 0x33,
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0xB8, 0x7A, 0xBC, 0xAB, 0x6E, 0x8C, 0x3F, 0x68, 0x0D, 0x87, 0x93, 0x7B, 0x70, 0xF2, 0xCE, 0x9D, 0x27, 0xA0,
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0x1B, 0x03, 0x02, 0x97, 0x99, 0x58, 0xC5, 0x90, 0x1A, 0x79, 0x8A, 0xB2, 0xDD, 0xE6, 0x86, 0x9B, 0x9F, 0xF3,
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0x78, 0x67, 0xED, 0x72, 0x30, 0x66, 0x94, 0xAE, 0xF1, 0x55, 0x6A, 0x0E, 0x8D, 0x5E, 0x82, 0x5A, 0xDB, 0xC7,
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0x7D, 0x2C, 0x75, 0xAC, 0x07, 0x95, 0x4A, 0x2B, 0xD4, 0x01, 0x0A, 0xBD, 0xCF, 0xE1, 0x7C, 0x15, 0xDF, 0x80,
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0x28, 0x3B, 0x2A, 0xE3, 0xF9, 0xAF, 0x29, 0xEC, 0x8B, 0x19, 0xC0, 0x39, 0x6F, 0x1D, 0xA2, 0xDA, 0x65, 0x34,
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0x50, 0xDC, 0x98, 0xB9, 0x0C, 0xC9, 0x21, 0x5B, 0xAA, 0x91, 0x96, 0x42, 0xFE, 0x25, 0x0B, 0x24, 0xB0, 0xB5,
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0x16, 0xD6, 0xD0, 0x31, 0x57, 0x18, 0x88, 0x6D, 0x1E, 0x54, 0x0F, 0x62, 0x77, 0x85, 0x10, 0x3A, 0x44, 0xBF,
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0x00, 0xEA, 0x08, 0x3E, 0xF6, 0xFA, 0x59, 0xBE, 0xCD, 0x64, 0x1C, 0x8F, 0x71, 0xC8, 0xBA, 0xA3, 0x89, 0x36,
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0xC3, 0x83, 0xC4, 0xE8, 0xA9, 0x4B, 0xEF, 0xBB, 0xD1, 0x41, 0xD3, 0xA5, 0x32, 0x9E, 0x26, 0xDE, 0x81, 0x40,
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0xA7, 0x4D, 0x23, 0xB7, 0x13, 0x8E, 0x17, 0x73, 0x4C, 0xE5, 0x20, 0x05, 0x51, 0x56, 0x11, 0x9C, 0x52, 0xCA,
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0x4F, 0x7E, 0xB6, 0xD8, 0x49, 0x5D, 0x3D, 0xD9, 0x12, 0x06, 0x63, 0xE2, 0xC6, 0x9A, 0x69, 0xE4, 0xD5, 0x6C,
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0x92, 0xD7, 0xB1, 0xF5, 0x3C, 0xA1, 0xE7, 0xEE, 0xFD, 0xA6, 0x2D, 0xB4, 0xE9, 0x53, 0xF0, 0xA8, 0x38, 0xCB,
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0x6B, 0xF7, 0x45, 0xF4, 0x74, 0x46, 0x35, 0xA4, 0xD2, 0x60, 0xC1, 0x2F, 0x14, 0x43, 0xC2, 0x5F, 0xAD, 0xFB,
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0xFC, 0x22, 0x84, 0xFF
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};
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public static byte[] SharedCryptKey = new byte[]
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{
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0xDD, 0xA8, 0x5F, 0x1E, 0x57, 0xAF, 0xC0, 0xCC, 0x43, 0x35, 0x8F, 0xBB, 0x6F, 0xE6, 0xA1, 0xD6, 0x60, 0xB9,
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0x1A, 0xAE, 0x20, 0x49, 0x24, 0x81, 0x21, 0xFE, 0x86, 0x2B, 0x98, 0xB7, 0xB3, 0xD2, 0x91, 0x01, 0x3A, 0x4C,
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0x65, 0x92, 0x1C, 0xF4, 0xBE, 0xDD, 0xD9, 0x08, 0xE6, 0x81, 0x98, 0x1B, 0x8D, 0x60, 0xF3, 0x6F, 0xA1, 0x47,
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0x24, 0xF1, 0x53, 0x45, 0xC8, 0x7B, 0x88, 0x80, 0x4E, 0x36, 0xC3, 0x0D, 0xC9, 0xD6, 0x8B, 0x08, 0x19, 0x0B,
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0xA5, 0xC1, 0x11, 0x4C, 0x60, 0xF8, 0x5D, 0xFC, 0x15, 0x68, 0x7E, 0x32, 0xC0, 0x50, 0xAB, 0x64, 0x1F, 0x8A,
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0xD4, 0x08, 0x39, 0x7F, 0xC2, 0xFB, 0xBA, 0x6C, 0xF0, 0xE6, 0xB0, 0x31, 0x10, 0xC1, 0xBF, 0x75, 0x43, 0xBB,
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0x18, 0x04, 0x0D, 0xD1, 0x97, 0xF7, 0x23, 0x21, 0x83, 0x8B, 0xCA, 0x25, 0x2B, 0xA3, 0x03, 0x13, 0xEA, 0xAE,
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0xFE, 0xF0, 0xEB, 0xFD, 0x85, 0x57, 0x53, 0x65, 0x41, 0x2A, 0x40, 0x99, 0xC0, 0x94, 0x65, 0x7E, 0x7C, 0x93,
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0x82, 0xB0, 0xB3, 0xE5, 0xC0, 0x21, 0x09, 0x84, 0xD5, 0xEF, 0x9F, 0xD1, 0x7E, 0xDC, 0x4D, 0xF5, 0x7E, 0xCD,
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0x45, 0x3C, 0x7F, 0xF5, 0x59, 0x98, 0xC6, 0x55, 0xFC, 0x9F, 0xA3, 0xB7, 0x74, 0xEE, 0x31, 0x98, 0xE6, 0xB7,
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0xBE, 0x26, 0xF4, 0x3C, 0x76, 0xF1, 0x23, 0x7E, 0x02, 0x4E, 0x3C, 0xD1, 0xC7, 0x28, 0x23, 0x73, 0xC4, 0xD9,
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0x5E, 0x0D, 0xA1, 0x80, 0xA5, 0xAA, 0x26, 0x0A, 0xA3, 0x44, 0x82, 0x74, 0xE6, 0x3C, 0x44, 0x27, 0x51, 0x0D,
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0x5F, 0xC7, 0x9C, 0xD6, 0x63, 0x67, 0xA5, 0x27, 0x97, 0x38, 0xFB, 0x2D, 0xD3, 0xD6, 0x60, 0x25, 0x83, 0x4D,
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0x37, 0x5B, 0x40, 0x59, 0x11, 0x77, 0x51, 0x11, 0x14, 0x18, 0x07, 0x63, 0xB1, 0x34, 0x3D, 0xB8, 0x60, 0x13,
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0xC2, 0xE8, 0x13, 0x82
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};
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private readonly MhfLogger _logger;
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private readonly MhfSetting _setting;
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private int _position;
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private IBuffer _buffer;
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private PacketHeader _header;
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private uint _readKeyRot;
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private uint _sendKeyRot;
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private uint _sentPackets;
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private ushort _combinedCheck;
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public PacketFactory(MhfSetting setting)
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{
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_logger = LogProvider.Logger<MhfLogger>(this);
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_setting = setting;
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_readKeyRot = CryptoInit;
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_sendKeyRot = CryptoInit;
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_sentPackets = 0;
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_header = null;
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Reset();
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}
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public byte[] Write(MhfPacket packet)
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{
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if (packet.Data.Size > ushort.MaxValue)
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{
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_logger.Error(
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$"Packet Size: {packet.Data.Size} exceeds maximum size of {ushort.MaxValue} for PacketId: {packet.Id}");
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return null;
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}
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byte[] data = packet.Data.GetAllBytes();
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byte keyRotDelta = 2;
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// Update the rolling key index.
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if (keyRotDelta != 0)
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{
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_sendKeyRot = keyRotDelta * (_sendKeyRot + 1);
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}
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data = Encrypt(data, _sendKeyRot,
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out ushort combinedCheck, out ushort check0,
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out ushort check1, out ushort check2);
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packet.Header.DataSize = (ushort)data.Length;
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packet.Header.Pf0 = (byte) (((packet.Header.DataSize >> 12) & 0xF3) | 3);
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packet.Header.KeyRotDelta = keyRotDelta;
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packet.Header.CombinedCheck = 0;
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packet.Header.Check0 = check0;
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packet.Header.Check1 = check1;
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packet.Header.Check2 = check2;
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Console.WriteLine(packet.Header.ToLogText());
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IBuffer buffer = BufferProvider.Provide();
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buffer.WriteByte(packet.Header.Pf0);
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buffer.WriteByte(packet.Header.KeyRotDelta);
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buffer.WriteInt16(packet.Header.Id, Endianness.Big);
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buffer.WriteInt16(packet.Header.DataSize, Endianness.Big);
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buffer.WriteInt16(packet.Header.CombinedCheck, Endianness.Big);
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buffer.WriteInt16(packet.Header.Check0, Endianness.Big);
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buffer.WriteInt16(packet.Header.Check1, Endianness.Big);
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buffer.WriteInt16(packet.Header.Check2, Endianness.Big);
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buffer.WriteBytes(data);
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byte[] final = buffer.GetAllBytes();
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return final;
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}
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public List<MhfPacket> Read(byte[] data)
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{
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List<MhfPacket> packets = new List<MhfPacket>();
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if (_buffer == null)
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{
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_buffer = BufferProvider.Provide(data);
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}
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else
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{
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_buffer.SetPositionEnd();
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_buffer.WriteBytes(data);
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}
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_buffer.Position = _position;
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bool read = true;
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while (read)
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{
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read = false;
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if (_header == null && _buffer.Size - _buffer.Position >= PacketHeaderSize)
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{
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byte pf0 = _buffer.ReadByte();
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byte keyRotDelta = _buffer.ReadByte();
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ushort id = _buffer.ReadUInt16(Endianness.Big);
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ushort dataSize = _buffer.ReadUInt16(Endianness.Big);
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ushort combinedCheck = _buffer.ReadUInt16(Endianness.Big);
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ushort check0 = _buffer.ReadUInt16(Endianness.Big);
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ushort check1 = _buffer.ReadUInt16(Endianness.Big);
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ushort check2 = _buffer.ReadUInt16(Endianness.Big);
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_header = new PacketHeader(id, pf0, keyRotDelta, dataSize, combinedCheck, check0, check1, check2);
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Console.WriteLine(_header.ToLogText());
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// Update the rolling key index.
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if (_header.KeyRotDelta != 0)
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{
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_readKeyRot = _header.KeyRotDelta * (_readKeyRot + 1);
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}
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}
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if (_header == null && _buffer.Size - _buffer.Position == InitPacketSize)
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{
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byte[] payload = _buffer.ReadBytes(InitPacketSize);
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_logger.Debug($"Ignoring Data: {Util.ToHexString(payload, ' ')}");
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}
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if (_header != null && _buffer.Size - _buffer.Position >= _header.DataSize)
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{
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byte[] packetData = _buffer.ReadBytes(_header.DataSize);
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packetData = Decrypt(packetData, _readKeyRot,
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out ushort combinedCheck, out ushort check0,
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out ushort check1, out ushort check2);
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IBuffer buffer = BufferProvider.Provide(packetData);
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MhfPacket packet = new MhfPacket(_header, buffer);
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packets.Add(packet);
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_header = null;
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read = _buffer.Position != _buffer.Size;
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}
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}
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if (_buffer.Position == _buffer.Size)
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{
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Reset();
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}
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else
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{
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_position = _buffer.Position;
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}
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return packets;
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}
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private void Reset()
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{
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_header = null;
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_position = 0;
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_buffer = null;
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}
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public void Test()
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{
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byte[] me = Util.FromHexString(
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
|
|
|
|
|
|
byte[] packetData = Util.FromHexString(
|
|
"444C54534B45595349474E3A313030007465737400736B3030242E546676664B2E487646356E6C317436624338555843536352766538524249704D4D4E395537524C786A6B2D0000");
|
|
|
|
|
|
byte[] packetData1 = Enc(packetData, (byte) (995118 & 0xFF));
|
|
Console.WriteLine("Enc " + Util.ToHexString(packetData1, ' '));
|
|
|
|
byte[] packetData2 = Encrypt(packetData, 2,
|
|
out ushort combinedCheck, out ushort check0,
|
|
out ushort check1, out ushort check2);
|
|
Console.WriteLine("Enc " + Util.ToHexString(packetData2, ' '));
|
|
|
|
|
|
// packetData = Decrypt(packetData);
|
|
// Console.WriteLine("Dec " + Util.ToHexString(packetData, ' '));
|
|
// Console.WriteLine("Dec " + Util.ToAsciiString(packetData, true));
|
|
}
|
|
|
|
private byte[] Decrypt(byte[] input, uint key, out ushort cc, out ushort c0, out ushort c1, out ushort c2)
|
|
{
|
|
uint size = (uint) input.Length;
|
|
byte[] output = new byte[size];
|
|
|
|
byte unkCryptkeyRotArg = (byte) ((key >> 1) % 999983);
|
|
uint unkDerivedCryptkeyRot = (uint) (size * (unkCryptkeyRotArg + 1));
|
|
|
|
byte sharedBufIdx = 1;
|
|
uint accumulator0 = 0;
|
|
uint accumulator1 = 0;
|
|
uint accumulator2 = 0;
|
|
|
|
for (int i = 0; i < size; i++)
|
|
{
|
|
// Do the decryption for this iteration
|
|
byte oldSharedBufIdx = sharedBufIdx;
|
|
byte tIdx = (byte) (input[i] ^ SharedCryptKey[sharedBufIdx]);
|
|
uint decKeyByte = DecryptKey[tIdx];
|
|
sharedBufIdx = (byte) ((unkDerivedCryptkeyRot >> 10) ^ decKeyByte);
|
|
|
|
// Update the checksum accumulators.
|
|
accumulator0 = (uint) (accumulator0 + (tIdx << (i & 7)));
|
|
accumulator1 = accumulator1 + decKeyByte;
|
|
accumulator2 = (uint) (accumulator2 + (oldSharedBufIdx * sharedBufIdx));
|
|
|
|
// Append the output.
|
|
output[i] = sharedBufIdx;
|
|
|
|
// Update the key pos for next iteration.
|
|
unkDerivedCryptkeyRot = 0x4FD * (unkDerivedCryptkeyRot + 1);
|
|
}
|
|
|
|
ushort combinedCheck = (ushort) (accumulator1 + (accumulator0 >> 1) + (accumulator2 >> 2));
|
|
ushort check0 = (ushort) (accumulator0 ^ (accumulator0 >> 16));
|
|
ushort check1 = (ushort) (accumulator1 ^ (accumulator1 >> 16));
|
|
ushort check2 = (ushort) (accumulator2 ^ (accumulator2 >> 16));
|
|
|
|
cc = combinedCheck;
|
|
c0 = check0;
|
|
c1 = check1;
|
|
c2 = check2;
|
|
return output;
|
|
}
|
|
|
|
private byte[] Encrypt(byte[] input, uint key, out ushort cc, out ushort c0, out ushort c1, out ushort c2)
|
|
{
|
|
uint size = (uint) input.Length;
|
|
byte[] output = new byte[size];
|
|
|
|
byte unkCryptkeyRotArg = (byte) ((key >> 1) % 999983);
|
|
uint unkDerivedCryptkeyRot = (uint) (size * (unkCryptkeyRotArg + 1));
|
|
|
|
byte sharedBufIdx = 1;
|
|
uint accumulator0 = 0;
|
|
uint accumulator1 = 0;
|
|
uint accumulator2 = 0;
|
|
|
|
for (int i = 0; i < size; i++)
|
|
{
|
|
// Do the encryption for this iteration
|
|
byte encKeyIdx = (byte) ((unkDerivedCryptkeyRot >> 10) ^ input[i]);
|
|
unkDerivedCryptkeyRot = 0x4FD * (unkDerivedCryptkeyRot + 1);
|
|
byte encKeyByte = EncryptKey[encKeyIdx];
|
|
|
|
// Update the checksum accumulators.
|
|
accumulator2 = (uint) (accumulator2 + (sharedBufIdx * input[i]));
|
|
accumulator1 = accumulator1 + encKeyIdx;
|
|
accumulator0 = (uint) (accumulator0 + (encKeyByte << (i & 7)));
|
|
|
|
// Append the output.
|
|
output[i] = (byte) (SharedCryptKey[sharedBufIdx] ^ encKeyByte);
|
|
|
|
// Update the shared_buf_idx for the next iteration.
|
|
sharedBufIdx = input[i];
|
|
}
|
|
|
|
ushort combinedCheck = (ushort) (accumulator1 + (accumulator0 >> 1) + (accumulator2 >> 2));
|
|
ushort check0 = (ushort) (accumulator0 ^ (accumulator0 >> 16));
|
|
ushort check1 = (ushort) (accumulator1 ^ (accumulator1 >> 16));
|
|
ushort check2 = (ushort) (accumulator2 ^ (accumulator2 >> 16));
|
|
|
|
cc = combinedCheck;
|
|
c0 = check0;
|
|
c1 = check1;
|
|
c2 = check2;
|
|
return output;
|
|
}
|
|
|
|
byte[] Enc(byte[] input, byte a5)
|
|
{
|
|
byte v12;
|
|
uint v13;
|
|
uint v14;
|
|
uint inputSize = (uint) input.Length;
|
|
byte outputIndex = 0;
|
|
byte inputIndex = 0;
|
|
uint v5 = inputSize * (a5 + 1u);
|
|
uint v6 = 0;
|
|
uint v7 = 0;
|
|
uint v8 = 0;
|
|
uint v9 = 0;
|
|
byte v10 = 1;
|
|
uint v19 = 0;
|
|
uint v18 = 0;
|
|
uint v17 = 0;
|
|
byte[] output = new byte[inputSize];
|
|
if (inputSize > 0)
|
|
{
|
|
do
|
|
{
|
|
v12 = input[inputIndex];
|
|
v19 += (uint) v10 * input[inputIndex];
|
|
v13 = (byte) ((v5 >> 10) ^ input[inputIndex]);
|
|
v18 += v13;
|
|
v13 = ReplaceByte(0, v13, EncryptKey[v13]);
|
|
v14 = (uint) ((byte) v13 << ((int) v9 & 7));
|
|
v9++;
|
|
v5 = 1277 * (v5 + 1);
|
|
v17 += v14;
|
|
output[outputIndex] = (byte) (SharedCryptKey[v10] ^ v13);
|
|
inputIndex = (byte) (outputIndex + 1);
|
|
v10 = v12;
|
|
++outputIndex;
|
|
} while (v9 < inputSize);
|
|
|
|
v6 = v19;
|
|
v7 = v18;
|
|
v8 = v17;
|
|
}
|
|
|
|
uint a6 = v6 ^ (v6 >> 16);
|
|
uint a4 = v7 ^ (v7 >> 16);
|
|
uint result = (uint) (v7 + ((int) v8 >> 1) + ((int) v6 >> 2));
|
|
uint a2 = v8 ^ (v8 >> 16);
|
|
ushort check3 = (ushort) a6;
|
|
ushort check2 = (ushort) a4;
|
|
ushort check1 = (ushort) a2;
|
|
ushort res = (ushort) result;
|
|
byte resB = (byte) result;
|
|
|
|
return output;
|
|
}
|
|
|
|
uint ReplaceByte(uint index, uint value, byte replaceByte)
|
|
{
|
|
var shiftBits = 8 * index;
|
|
var mask = ~(0xff << (int) shiftBits);
|
|
return (uint) (value & mask | (replaceByte << (int) shiftBits));
|
|
}
|
|
}
|
|
}
|