1 files changed, 53 insertions, 0 deletions
diff --git a/src/common/Cryptography/HmacHash.h b/src/common/Cryptography/HmacHash.h
new file mode 100644
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+++ b/src/common/Cryptography/HmacHash.h
@@ -0,0 +1,53 @@
+/*
+ * 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/>.
+ */
+
+#ifndef _AUTH_HMAC_H
+#define _AUTH_HMAC_H
+
+#include "Define.h"
+#include <string>
+#include <openssl/hmac.h>
+#include <openssl/sha.h>
+
+class BigNumber;
+
+#define SEED_KEY_SIZE 16
+
+typedef EVP_MD const* (*HashCreateFn)();
+
+template<HashCreateFn HashCreator, uint32 DigestLength>
+class HmacHash
+{
+    public:
+        HmacHash(uint32 len, uint8 const* seed);
+        ~HmacHash();
+        void UpdateData(std::string const& str);
+        void UpdateData(uint8 const* data, size_t len);
+        void Finalize();
+        uint8* ComputeHash(BigNumber* bn);
+        uint8* GetDigest() { return _digest; }
+        uint32 GetLength() const { return DigestLength; }
+    private:
+        HMAC_CTX _ctx;
+        uint8 _digest[DigestLength];
+};
+
+typedef HmacHash<EVP_sha1, SHA_DIGEST_LENGTH> HmacSha1;
+typedef HmacHash<EVP_sha256, SHA256_DIGEST_LENGTH> HmacSha256;
+
+#endif