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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/.
#include "gtest/gtest.h"
#include <stdint.h>
#include <string.h>
#ifdef __MACH__
#include <mach/clock.h>
#include <mach/mach.h>
#endif
#include "mpi.h"
namespace nss_test {
void gettime(struct timespec* tp) {
#ifdef __MACH__
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
tp->tv_sec = mts.tv_sec;
tp->tv_nsec = mts.tv_nsec;
#else
clock_gettime(CLOCK_MONOTONIC, tp);
#endif
}
class MPITest : public ::testing::Test {
protected:
void TestCmp(const std::string a_string, const std::string b_string,
int result) {
mp_int a, b;
MP_DIGITS(&a) = 0;
MP_DIGITS(&b) = 0;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_init(&b));
mp_read_radix(&a, a_string.c_str(), 16);
mp_read_radix(&b, b_string.c_str(), 16);
EXPECT_EQ(result, mp_cmp(&a, &b));
mp_clear(&a);
mp_clear(&b);
}
void TestDiv(const std::string a_string, const std::string b_string,
const std::string result) {
mp_int a, b, c;
MP_DIGITS(&a) = 0;
MP_DIGITS(&b) = 0;
MP_DIGITS(&c) = 0;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_init(&b));
ASSERT_EQ(MP_OKAY, mp_init(&c));
mp_read_radix(&a, a_string.c_str(), 16);
mp_read_radix(&b, b_string.c_str(), 16);
mp_read_radix(&c, result.c_str(), 16);
EXPECT_EQ(MP_OKAY, mp_div(&a, &b, &a, &b));
EXPECT_EQ(0, mp_cmp(&a, &c));
mp_clear(&a);
mp_clear(&b);
mp_clear(&c);
}
void dump(const std::string& prefix, const uint8_t* buf, size_t len) {
auto flags = std::cerr.flags();
std::cerr << prefix << ": [" << std::dec << len << "] ";
for (size_t i = 0; i < len; ++i) {
std::cerr << std::hex << std::setw(2) << std::setfill('0')
<< static_cast<int>(buf[i]);
}
std::cerr << std::endl << std::resetiosflags(flags);
}
void TestToFixedOctets(const std::vector<uint8_t>& ref, size_t len) {
mp_int a;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_read_unsigned_octets(&a, ref.data(), ref.size()));
uint8_t buf[len];
ASSERT_EQ(MP_OKAY, mp_to_fixlen_octets(&a, buf, len));
size_t compare;
if (len > ref.size()) {
for (size_t i = 0; i < len - ref.size(); ++i) {
ASSERT_EQ(0U, buf[i]) << "index " << i << " should be zero";
}
compare = ref.size();
} else {
compare = len;
}
dump("value", ref.data(), ref.size());
dump("output", buf, len);
ASSERT_EQ(0, memcmp(buf + len - compare, ref.data() + ref.size() - compare,
compare))
<< "comparing " << compare << " octets";
mp_clear(&a);
}
};
TEST_F(MPITest, MpiCmp01Test) { TestCmp("0", "1", -1); }
TEST_F(MPITest, MpiCmp10Test) { TestCmp("1", "0", 1); }
TEST_F(MPITest, MpiCmp00Test) { TestCmp("0", "0", 0); }
TEST_F(MPITest, MpiCmp11Test) { TestCmp("1", "1", 0); }
TEST_F(MPITest, MpiDiv32ErrorTest) {
TestDiv("FFFF00FFFFFFFF000000000000", "FFFF00FFFFFFFFFF", "FFFFFFFFFF");
}
#ifdef NSS_X64
// This tests assumes 64-bit mp_digits.
TEST_F(MPITest, MpiCmpUnalignedTest) {
mp_int a, b, c;
MP_DIGITS(&a) = 0;
MP_DIGITS(&b) = 0;
MP_DIGITS(&c) = 0;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_init(&b));
ASSERT_EQ(MP_OKAY, mp_init(&c));
mp_read_radix(&a, "ffffffffffffffff3b4e802b4e1478", 16);
mp_read_radix(&b, "ffffffffffffffff3b4e802b4e1478", 16);
EXPECT_EQ(0, mp_cmp(&a, &b));
// Now change a and b such that they contain the same numbers but are not
// aligned.
// a = ffffffffffffff|ff3b4e802b4e1478
// b = ffffffffffffffff|3b4e802b4e1478
MP_DIGITS(&b)[0] &= 0x00ffffffffffffff;
MP_DIGITS(&b)[1] = 0xffffffffffffffff;
EXPECT_EQ(-1, mp_cmp(&a, &b));
ASSERT_EQ(MP_OKAY, mp_sub(&a, &b, &c));
char c_tmp[40];
ASSERT_EQ(MP_OKAY, mp_toradix(&c, c_tmp, 16));
ASSERT_TRUE(strncmp(c_tmp, "feffffffffffffff100000000000000", 31));
mp_clear(&a);
mp_clear(&b);
mp_clear(&c);
}
#endif
TEST_F(MPITest, MpiFixlenOctetsZero) {
std::vector<uint8_t> zero = {0};
TestToFixedOctets(zero, 1);
TestToFixedOctets(zero, 2);
TestToFixedOctets(zero, sizeof(mp_digit));
TestToFixedOctets(zero, sizeof(mp_digit) + 1);
}
TEST_F(MPITest, MpiFixlenOctetsVarlen) {
std::vector<uint8_t> packed;
for (size_t i = 0; i < sizeof(mp_digit) * 2; ++i) {
packed.push_back(0xa4); // Any non-zero value will do.
TestToFixedOctets(packed, packed.size());
TestToFixedOctets(packed, packed.size() + 1);
TestToFixedOctets(packed, packed.size() + sizeof(mp_digit));
}
}
TEST_F(MPITest, MpiFixlenOctetsTooSmall) {
uint8_t buf[sizeof(mp_digit) * 3];
std::vector<uint8_t> ref;
for (size_t i = 0; i < sizeof(mp_digit) * 2; i++) {
ref.push_back(3); // Any non-zero value will do.
dump("ref", ref.data(), ref.size());
mp_int a;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_read_unsigned_octets(&a, ref.data(), ref.size()));
#ifdef DEBUG
// ARGCHK maps to assert() in a debug build.
EXPECT_DEATH(mp_to_fixlen_octets(&a, buf, ref.size() - 1), "");
#else
EXPECT_EQ(MP_BADARG, mp_to_fixlen_octets(&a, buf, ref.size() - 1));
#endif
ASSERT_EQ(MP_OKAY, mp_to_fixlen_octets(&a, buf, ref.size()));
ASSERT_EQ(0, memcmp(buf, ref.data(), ref.size()));
mp_clear(&a);
}
}
// This test is slow. Disable it by default so we can run these tests on CI.
class DISABLED_MPITest : public ::testing::Test {};
TEST_F(DISABLED_MPITest, MpiCmpConstTest) {
mp_int a, b, c;
MP_DIGITS(&a) = 0;
MP_DIGITS(&b) = 0;
MP_DIGITS(&c) = 0;
ASSERT_EQ(MP_OKAY, mp_init(&a));
ASSERT_EQ(MP_OKAY, mp_init(&b));
ASSERT_EQ(MP_OKAY, mp_init(&c));
mp_read_radix(
&a,
const_cast<char*>(
"FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551"),
16);
mp_read_radix(
&b,
const_cast<char*>(
"FF0FFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551"),
16);
mp_read_radix(
&c,
const_cast<char*>(
"FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632550"),
16);
#ifdef CT_VERIF
mp_taint(&b);
mp_taint(&c);
#endif
uint32_t runs = 5000000;
uint32_t time_b = 0, time_c = 0;
for (uint32_t i = 0; i < runs; ++i) {
struct timespec start, end;
gettime(&start);
int r = mp_cmp(&a, &b);
gettime(&end);
unsigned long long used = end.tv_sec * 1000000000L + end.tv_nsec;
used -= static_cast<unsigned long long>(start.tv_sec * 1000000000L +
start.tv_nsec);
time_b += used;
ASSERT_EQ(1, r);
}
printf("time b: %u\n", time_b / runs);
for (uint32_t i = 0; i < runs; ++i) {
struct timespec start, end;
gettime(&start);
int r = mp_cmp(&a, &c);
gettime(&end);
unsigned long long used = end.tv_sec * 1000000000L + end.tv_nsec;
used -= static_cast<unsigned long long>(start.tv_sec * 1000000000L +
start.tv_nsec);
time_c += used;
ASSERT_EQ(1, r);
}
printf("time c: %u\n", time_c / runs);
mp_clear(&a);
mp_clear(&b);
mp_clear(&c);
}
} // nss_test
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