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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* This target fuzzes NSS mpi against openssl bignum.
* It therefore requires openssl to be installed.
*/
#include "mpi_helper.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
// We require at least size 3 to get two integers from Data.
if (size < 3) {
return 0;
}
INIT_FOUR_NUMBERS
// We can't divide by 0.
if (mp_cmp_z(&b) == 0) {
CLEANUP_AND_RETURN
}
// Compare with OpenSSL mod
assert(mp_mod(&a, &b, &c) == MP_OKAY);
(void)BN_mod(C, A, B, ctx);
check_equal(C, &c, max_size);
// Check a mod b = a - floor(a / b) * b
assert(mp_div(&a, &b, &r, nullptr) == MP_OKAY);
assert(mp_mul(&r, &b, &r) == MP_OKAY);
assert(mp_sub(&a, &r, &r) == MP_OKAY);
assert(mp_cmp(&c, &r) == 0);
CLEANUP_AND_RETURN
}
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