hondacrx
100 lines
3.6 KiB
C#
100 lines
3.6 KiB
C#
/*
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* Copyright (C) 2012-2018 CypherCore <http://github.com/CypherCore>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Security.Cryptography;
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namespace Framework.Cryptography
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{
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public sealed class WorldCrypt : IDisposable
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{
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static readonly byte[] ServerEncryptionKey = { 0x08, 0xF1, 0x95, 0x9F, 0x47, 0xE5, 0xD2, 0xDB, 0xA1, 0x3D, 0x77, 0x8F, 0x3F, 0x3E, 0xE7, 0x00 };
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static readonly byte[] ServerDecryptionKey = { 0x40, 0xAA, 0xD3, 0x92, 0x26, 0x71, 0x43, 0x47, 0x3A, 0x31, 0x08, 0xA6, 0xE7, 0xDC, 0x98, 0x2A };
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public void Initialize(byte[] sessionKey)
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{
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if (IsInitialized)
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throw new InvalidOperationException("PacketCrypt already initialized!");
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SARC4Encrypt = new SARC4();
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SARC4Decrypt = new SARC4();
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var encryptSHA1 = new HMACSHA1(ServerEncryptionKey);
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var decryptSHA1 = new HMACSHA1(ServerDecryptionKey);
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SARC4Encrypt.PrepareKey(encryptSHA1.ComputeHash(sessionKey));
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SARC4Decrypt.PrepareKey(decryptSHA1.ComputeHash(sessionKey));
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var PacketEncryptionDummy = new byte[0x400];
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var PacketDecryptionDummy = new byte[0x400];
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SARC4Encrypt.ProcessBuffer(PacketEncryptionDummy, PacketEncryptionDummy.Length);
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SARC4Decrypt.ProcessBuffer(PacketDecryptionDummy, PacketDecryptionDummy.Length);
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IsInitialized = true;
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}
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public void Initialize(byte[] sessionKey, byte[] serverSeed, byte[] clientSeed)
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{
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if (IsInitialized)
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throw new InvalidOperationException("PacketCrypt already initialized!");
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SARC4Encrypt = new SARC4();
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SARC4Decrypt = new SARC4();
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var encryptSHA1 = new HMACSHA1(serverSeed);
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var decryptSHA1 = new HMACSHA1(clientSeed);
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SARC4Encrypt.PrepareKey(encryptSHA1.ComputeHash(sessionKey));
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SARC4Decrypt.PrepareKey(decryptSHA1.ComputeHash(sessionKey));
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var PacketEncryptionDummy = new byte[0x400];
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var PacketDecryptionDummy = new byte[0x400];
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SARC4Encrypt.ProcessBuffer(PacketEncryptionDummy, PacketEncryptionDummy.Length);
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SARC4Decrypt.ProcessBuffer(PacketDecryptionDummy, PacketDecryptionDummy.Length);
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IsInitialized = true;
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}
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public void Encrypt(byte[] data, int count)
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{
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if (!IsInitialized)
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throw new InvalidOperationException("PacketCrypt not initialized!");
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SARC4Encrypt.ProcessBuffer(data, count);
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}
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public void Decrypt(byte[] data, int count)
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{
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if (!IsInitialized)
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throw new InvalidOperationException("PacketCrypt not initialized!");
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SARC4Decrypt.ProcessBuffer(data, count);
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}
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public void Dispose()
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{
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IsInitialized = false;
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}
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public bool IsInitialized { get; set; }
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SARC4 SARC4Encrypt;
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SARC4 SARC4Decrypt;
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}
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}
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