1 files changed, 45 insertions, 0 deletions
diff --git a/src/core/Cryptography/HMACSHA1.cpp b/src/core/Cryptography/HMACSHA1.cpp
new file mode 100644
index 0000000000..93872d2716
--- /dev/null
+++ b/src/core/Cryptography/HMACSHA1.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license: http://github.com/azerothcore/azerothcore-wotlk/LICENSE-GPL2
+ * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
+#include "HMACSHA1.h"
+#include "BigNumber.h"
+#include "Common.h"
+
+HmacHash::HmacHash(uint32 len, uint8 *seed)
+{
+    HMAC_CTX_init(&m_ctx);
+    HMAC_Init_ex(&m_ctx, seed, len, EVP_sha1(), NULL);
+    memset(m_digest, 0, sizeof(m_digest));
+}
+
+HmacHash::~HmacHash()
+{
+    HMAC_CTX_cleanup(&m_ctx);
+}
+
+void HmacHash::UpdateData(const std::string &str)
+{
+    HMAC_Update(&m_ctx, (uint8 const*)str.c_str(), str.length());
+}
+
+void HmacHash::UpdateData(const uint8* data, size_t len)
+{
+    HMAC_Update(&m_ctx, data, len);
+}
+
+void HmacHash::Finalize()
+{
+    uint32 length = 0;
+    HMAC_Final(&m_ctx, (uint8*)m_digest, &length);
+    ASSERT(length == SHA_DIGEST_LENGTH);
+}
+
+uint8 *HmacHash::ComputeHash(BigNumber* bn)
+{
+    HMAC_Update(&m_ctx, bn->AsByteArray().get(), bn->GetNumBytes());
+    Finalize();
+    return (uint8*)m_digest;
+}