AuthCrypt.cpp

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/*
* This file is part of Project SkyFire https://www.projectskyfire.org.
* See LICENSE.md file for Copyright information
*/
 
#include "AuthCrypt.h"
#include "Errors.h"
#include "HMAC.h"
 
AuthCrypt::AuthCrypt() : _initialized(false)
{
}
 
 
void AuthCrypt::Init(SessionKey const& K)
{
    uint8 ServerEncryptionKey[] = { 0x08, 0xF1, 0x95, 0x9F, 0x47, 0xE5, 0xD2, 0xDB, 0xA1, 0x3D, 0x77, 0x8F, 0x3F, 0x3E, 0xE7, 0x00 };
    _serverEncrypt.Init(SkyFire::Crypto::HMAC_SHA1::GetDigestOf(ServerEncryptionKey, K));
    uint8 ServerDecryptionKey[] = { 0x40, 0xAA, 0xD3, 0x92, 0x26, 0x71, 0x43, 0x47, 0x3A, 0x31, 0x08, 0xA6, 0xE7, 0xDC, 0x98, 0x2A };
    _clientDecrypt.Init(SkyFire::Crypto::HMAC_SHA1::GetDigestOf(ServerDecryptionKey, K));
 
    // Drop first 1024 bytes, as WoW uses ARC4-drop1024.
    std::array<uint8, 1024> syncBuf;
    _serverEncrypt.UpdateData(syncBuf);
    _clientDecrypt.UpdateData(syncBuf);
 
    _initialized = true;
}
 
void AuthCrypt::DecryptRecv(uint8 *data, size_t len)
{
    ASSERT(_initialized);
    _clientDecrypt.UpdateData(data, len);
}
 
void AuthCrypt::EncryptSend(uint8 *data, size_t len)
{
    ASSERT(_initialized);
    _serverEncrypt.UpdateData(data, len);
}