Core/Auth: Battle.net stuff

src/server/shared/Cryptography/HmacHash.cpp

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+/*
+ * Copyright (C) 2008-2014 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 "HmacHash.h"
+#include "BigNumber.h"
+#include "Common.h"
+
+HmacHash::HmacHash(uint32 len, uint8 *seed, EVP_MD const* hasher, uint32 digestLength)
+{
+    HMAC_CTX_init(&_ctx);
+    HMAC_Init_ex(&_ctx, seed, len, hasher, NULL);
+    _digest = new uint8[digestLength];
+    memset(_digest, 0, digestLength);
+}
+
+HmacHash::~HmacHash()
+{
+    HMAC_CTX_cleanup(&_ctx);
+    delete[] _digest;
+}
+
+void HmacHash::UpdateData(const std::string &str)
+{
+    HMAC_Update(&_ctx, (uint8 const*)str.c_str(), str.length());
+}
+
+void HmacHash::UpdateData(const uint8* data, size_t len)
+{
+    HMAC_Update(&_ctx, data, len);
+}
+
+void HmacHash::Finalize()
+{
+    uint32 length = 0;
+    HMAC_Final(&_ctx, _digest, &length);
+    ASSERT(length == _digestLength);
+}
+
+uint8* HmacHash::ComputeHash(BigNumber* bn)
+{
+    HMAC_Update(&_ctx, bn->AsByteArray().get(), bn->GetNumBytes());
+    Finalize();
+    return _digest;
+}