From f1a0f0a56fdd0fc39f255174ce08c06b91c66c94 Mon Sep 17 00:00:00 2001 From: wolfbeast Date: Fri, 23 Feb 2018 11:04:39 +0100 Subject: Update NSS to 3.35-RTM --- security/nss/fuzz/mpi_expmod_target.cc | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'security/nss/fuzz/mpi_expmod_target.cc') diff --git a/security/nss/fuzz/mpi_expmod_target.cc b/security/nss/fuzz/mpi_expmod_target.cc index ed31da354..b9be5854f 100644 --- a/security/nss/fuzz/mpi_expmod_target.cc +++ b/security/nss/fuzz/mpi_expmod_target.cc @@ -19,6 +19,15 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { auto modulus = get_modulus(data, size, ctx); // Compare with OpenSSL exp mod m1 = &std::get<1>(modulus); + // The exponent b (B) can get really big. Make it smaller if necessary. + if (MP_USED(&b) > 100) { + size_t shift = (MP_USED(&b) - 100) * MP_DIGIT_BIT; + mp_div_2d(&b, shift, &b, nullptr); + BN_rshift(B, B, shift); + } + check_equal(A, &a, max_size); + check_equal(B, &b, max_size); + check_equal(std::get<0>(modulus), m1, 3 * max_size); assert(mp_exptmod(&a, &b, m1, &c) == MP_OKAY); (void)BN_mod_exp(C, A, B, std::get<0>(modulus), ctx); check_equal(C, &c, 2 * max_size); -- cgit v1.2.3