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78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
// Copyright (c) 2020, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <gcrypt.h>
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namespace openpgp
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{
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class mpi
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{
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public:
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mpi(const mpi &) = delete;
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mpi &operator=(const mpi &) = delete;
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mpi(mpi &&other)
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: data(other.data)
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{
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other.data = nullptr;
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}
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template <
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typename byte_container,
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typename = typename std::enable_if<(sizeof(typename byte_container::value_type) == 1)>::type>
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mpi(const byte_container &buffer, gcry_mpi_format format = GCRYMPI_FMT_USG)
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: mpi(&buffer[0], buffer.size(), format)
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{
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}
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mpi(const void *buffer, size_t size, gcry_mpi_format format = GCRYMPI_FMT_USG)
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{
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if (gcry_mpi_scan(&data, format, buffer, size, nullptr) != GPG_ERR_NO_ERROR)
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{
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throw std::runtime_error("failed to read mpi from buffer");
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}
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}
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~mpi()
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{
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gcry_mpi_release(data);
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}
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const gcry_mpi_t &get() const
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{
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return data;
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}
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private:
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gcry_mpi_t data;
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};
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} // namespace openpgp
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