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/* $OpenBSD: bn_unit.c,v 1.2 2022/12/06 18:23:29 tb Exp $ */
/*
* Copyright (c) 2022 Theo Buehler <tb@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/bn.h>
static int
test_bn_print_wrapper(char *a, size_t size, const char *descr,
int (*to_bn)(BIGNUM **, const char *))
{
int ret;
ret = to_bn(NULL, a);
if (ret != 0 && (ret < 0 || (size_t)ret != size - 1)) {
fprintf(stderr, "unexpected %s() return"
"want 0 or %zu, got %d\n", descr, size - 1, ret);
return 1;
}
return 0;
}
static int
test_bn_print_null_derefs(void)
{
size_t size = INT_MAX / 4 + 4;
size_t datalimit = (size + 500 * 1024) / 1024;
char *a;
char digit;
int failed = 0;
if ((a = malloc(size)) == NULL) {
warn("malloc(%zu) failed (make sure data limit is >= %zu KiB)",
size, datalimit);
return 0;
}
/* Fill with a random digit since coverity doesn't like us using '0'. */
digit = '0' + arc4random_uniform(10);
memset(a, digit, size - 1);
a[size - 1] = '\0';
failed |= test_bn_print_wrapper(a, size, "BN_dec2bn", BN_dec2bn);
failed |= test_bn_print_wrapper(a, size, "BN_hex2bn", BN_hex2bn);
free(a);
return failed;
}
int
main(void)
{
int failed = 0;
failed |= test_bn_print_null_derefs();
return failed;
}
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