1 files changed, 75 insertions, 0 deletions
diff --git a/src/common/Cryptography/Authentication/AuthCrypt.cpp b/src/common/Cryptography/Authentication/AuthCrypt.cpp
new file mode 100644
index 00000000000..153726e6950
--- /dev/null
+++ b/src/common/Cryptography/Authentication/AuthCrypt.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2008-2015 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "AuthCrypt.h"
+#include "Cryptography/HMACSHA1.h"
+#include "Cryptography/BigNumber.h"
+
+#include <cstring>
+
+AuthCrypt::AuthCrypt() :
+    _clientDecrypt(SHA_DIGEST_LENGTH), _serverEncrypt(SHA_DIGEST_LENGTH),
+    _initialized(false)
+{ }
+
+void AuthCrypt::Init(BigNumber* K)
+{
+    uint8 ServerEncryptionKey[SEED_KEY_SIZE] = { 0xCC, 0x98, 0xAE, 0x04, 0xE8, 0x97, 0xEA, 0xCA, 0x12, 0xDD, 0xC0, 0x93, 0x42, 0x91, 0x53, 0x57 };
+    HmacHash serverEncryptHmac(SEED_KEY_SIZE, (uint8*)ServerEncryptionKey);
+    uint8 *encryptHash = serverEncryptHmac.ComputeHash(K);
+
+    uint8 ServerDecryptionKey[SEED_KEY_SIZE] = { 0xC2, 0xB3, 0x72, 0x3C, 0xC6, 0xAE, 0xD9, 0xB5, 0x34, 0x3C, 0x53, 0xEE, 0x2F, 0x43, 0x67, 0xCE };
+    HmacHash clientDecryptHmac(SEED_KEY_SIZE, (uint8*)ServerDecryptionKey);
+    uint8 *decryptHash = clientDecryptHmac.ComputeHash(K);
+
+    //ARC4 _serverDecrypt(encryptHash);
+    _clientDecrypt.Init(decryptHash);
+    _serverEncrypt.Init(encryptHash);
+    //ARC4 _clientEncrypt(decryptHash);
+
+    // Drop first 1024 bytes, as WoW uses ARC4-drop1024.
+    uint8 syncBuf[1024];
+    memset(syncBuf, 0, 1024);
+
+    _serverEncrypt.UpdateData(1024, syncBuf);
+    //_clientEncrypt.UpdateData(1024, syncBuf);
+
+    memset(syncBuf, 0, 1024);
+
+    //_serverDecrypt.UpdateData(1024, syncBuf);
+    _clientDecrypt.UpdateData(1024, syncBuf);
+
+    _initialized = true;
+}
+
+void AuthCrypt::DecryptRecv(uint8 *data, size_t len)
+{
+    if (!_initialized)
+        return;
+
+    _clientDecrypt.UpdateData(len, data);
+}
+
+void AuthCrypt::EncryptSend(uint8 *data, size_t len)
+{
+    if (!_initialized)
+        return;
+
+    _serverEncrypt.UpdateData(len, data);
+}
+