48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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::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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