Source code
Revision control
Copy as Markdown
Other Tools
/*-
* Copyright (c) 2018-2025 Ribose Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include <stdlib.h>
#include "mpi.hpp"
#include "mem.h"
#include "utils.h"
namespace pgp {
size_t
mpi::bits() const noexcept
{
size_t bits = 0;
size_t idx = 0;
uint8_t bt;
for (idx = 0; (idx < size()) && !data_[idx]; idx++)
;
if (idx < size()) {
for (bits = (size() - idx - 1) << 3, bt = data_[idx]; bt; bits++, bt = bt >> 1)
;
}
return bits;
}
size_t
mpi::size() const noexcept
{
return data_.size();
}
uint8_t *
mpi::data() noexcept
{
return data_.data();
}
const uint8_t *
mpi::data() const noexcept
{
return data_.data();
}
bool
mpi::operator==(const mpi &src) const
{
size_t idx1 = 0;
size_t idx2 = 0;
for (idx1 = 0; (idx1 < size()) && !data_[idx1]; idx1++)
;
for (idx2 = 0; (idx2 < src.size()) && !src[idx2]; idx2++)
;
return ((size() - idx1) == (src.size() - idx2) &&
!memcmp(data() + idx1, src.data() + idx2, size() - idx1));
}
bool
mpi::operator!=(const mpi &src) const
{
return !(*this == src);
}
uint8_t &
mpi::operator[](size_t idx)
{
return data_.at(idx);
}
const uint8_t &
mpi::operator[](size_t idx) const
{
return data_.at(idx);
}
void
mpi::assign(const uint8_t *val, size_t size)
{
data_.assign(val, val + size);
}
void
mpi::copy(uint8_t *dst) const noexcept
{
memcpy(dst, data_.data(), data_.size());
}
void
mpi::resize(size_t size, uint8_t fill)
{
data_.resize(size, fill);
}
void
mpi::forget() noexcept
{
secure_clear(data_.data(), data_.size());
data_.resize(0);
}
} // namespace pgp