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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);
}
};
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
// 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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