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-rw-r--r--security/nss/fuzz/mpi_mulmod_target.cc27
1 files changed, 27 insertions, 0 deletions
diff --git a/security/nss/fuzz/mpi_mulmod_target.cc b/security/nss/fuzz/mpi_mulmod_target.cc
new file mode 100644
index 000000000..75585e2d7
--- /dev/null
+++ b/security/nss/fuzz/mpi_mulmod_target.cc
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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
+
+ auto modulus = get_modulus(data, size, ctx);
+ // Compare with OpenSSL mul mod
+ m1 = &std::get<1>(modulus);
+ assert(mp_mulmod(&a, &b, m1, &c) == MP_OKAY);
+ (void)BN_mod_mul(C, A, B, std::get<0>(modulus), ctx);
+ check_equal(C, &c, max_size);
+
+ CLEANUP_AND_RETURN
+}