51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_HASH_HMAC_HPP
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#define __UTIL_HASH_HMAC_HPP
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#include <array>
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#include <cstdint>
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#include <cstdlib>
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namespace util { namespace hash {
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template <class T>
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/// RFC 2104 key-hashing for message authentication
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class HMAC {
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public:
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using digest_t = typename T::digest_t;
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HMAC (const uint8_t *key, size_t);
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void update (const void *restrict, size_t);
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void finish (void);
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void reset (void);
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digest_t digest (void);
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private:
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std::array<uint8_t,T::BLOCK_SIZE> m_ikey;
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std::array<uint8_t,T::BLOCK_SIZE> m_okey;
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T m_hash;
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};
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} }
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#endif
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