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43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* This target fuzzes NSS mpi against openssl bignum.
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* It therefore requires openssl to be installed.
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*/
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#include "mpi_helper.h"
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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// We require at least size 3 to get two integers from Data.
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if (size < 3) {
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return 0;
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}
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INIT_FOUR_NUMBERS
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// Compare with OpenSSL subtraction
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assert(mp_sub(&a, &b, &c) == MP_OKAY);
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(void)BN_sub(C, A, B);
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check_equal(C, &c, max_size);
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// Check a - b == a + -b
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mp_neg(&b, &b);
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assert(mp_add(&a, &b, &r) == MP_OKAY);
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bool eq = mp_cmp(&r, &c) == 0;
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if (!eq) {
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char rC[max_size], cC[max_size], aC[max_size], bC[max_size];
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mp_tohex(&r, rC);
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mp_tohex(&c, cC);
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mp_tohex(&a, aC);
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mp_tohex(&b, bC);
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std::cout << "a = " << std::hex << aC << std::endl;
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std::cout << "-b = " << std::hex << bC << std::endl;
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std::cout << "a - b = " << std::hex << cC << std::endl;
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std::cout << "a + -b = " << std::hex << rC << std::endl;
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}
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assert(eq);
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CLEANUP_AND_RETURN
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}
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