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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include "sign/bnutils.h"
#include "common/base64.h"
/*!
* \brief Convert Base64 encoded number into OpenSSL BIGNUM format.
*/
BIGNUM *knot_b64_to_bignum(const char *input)
{
size_t size = strlen(input);
uint8_t *decoded;
int32_t decoded_size;
BIGNUM *result;
decoded_size = base64_decode_alloc((uint8_t *)input, size, &decoded);
if (decoded_size < 0) {
return NULL;
}
result = BN_bin2bn((unsigned char *)decoded, (int)decoded_size, NULL);
free(decoded);
return result;
}
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