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/*
* Copyright (c) 2021, [Ribose Inc](https://www.ribose.com).
* 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 OWNER 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 <stdlib.h>
#include <assert.h>
#include "bn.h"
#include "logging.h"
/* store in unsigned [big endian] format */
int
bn_bn2bin(const bignum_t *a, unsigned char *b)
{
if (!a || !b) {
return -1;
}
return BN_bn2bin(a, b) >= 0 ? 0 : -1;
}
bignum_t *
mpi2bn(const pgp_mpi_t *val)
{
assert(val);
if (!val) {
RNP_LOG("NULL val.");
return NULL;
}
bignum_t *res = bn_new();
if (!res) {
return NULL;
}
if (!BN_bin2bn(val->mpi, val->len, res)) {
bn_free(res);
res = NULL;
}
return res;
}
bool
bn2mpi(const bignum_t *bn, pgp_mpi_t *val)
{
val->len = bn_num_bytes(*bn);
return bn_bn2bin(bn, val->mpi) == 0;
}
bignum_t *
bn_new(void)
{
return BN_new();
}
void
bn_free(bignum_t *a)
{
BN_clear_free(a);
}
size_t
bn_num_bytes(const bignum_t &a)
{
return (BN_num_bits(&a) + 7) / 8;
}
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