libcruft-util/hash/ripemd.hpp

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright:
 *      2014, Danny Robson <danny@nerdcruft.net>
 */

#ifndef __UTIL_HASH_RIPEMD_HPP
#define __UTIL_HASH_RIPEMD_HPP

#include <array>

namespace util {
    namespace hash {
        class RIPEMD {
            public:
                typedef std::array<uint8_t,20> digest_t;

            public:
                RIPEMD();

                void update (const uint8_t*, size_t);
                digest_t digest (void) const;
                void finish (void);
                void reset (void);

            protected:
                void transform ();

                bool m_finished;

                uint32_t m_state[5];
                uint64_t m_length;

                struct {
                    union {
                        uint32_t d32[16];
                        uint8_t  d08[64];
                    };
                    size_t size;
                } m_buffer;
        };
    }
}

#endif