blob: 0f69e00b6a12dda2ea3ddc4b18f4a953e79415e5 [file] [log] [blame]
// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Ported from ChromeOS EC repository.
// 136a80e1138633c2f2ac249c15078b587af9c7ec/test/x25519.c
// Changed item:
// - Use Google Test as unittest framework.
#include <string.h>
#include <base/logging.h>
#include <gtest/gtest.h>
#include "hammerd/curve25519.h"
// Define this to test 1 million iterations of x25519 (takes up to
// a few minutes on host, up to a few days on microcontroller).
#undef TEST_X25519_1M_ITERATIONS
namespace hammerd {
TEST(X25519Test, scalar) {
// Taken from
static const uint8_t scalar1[32] = {
0xa5, 0x46, 0xe3, 0x6b, 0xf0, 0x52, 0x7c, 0x9d, 0x3b, 0x16, 0x15,
0x4b, 0x82, 0x46, 0x5e, 0xdd, 0x62, 0x14, 0x4c, 0x0a, 0xc1, 0xfc,
0x5a, 0x18, 0x50, 0x6a, 0x22, 0x44, 0xba, 0x44, 0x9a, 0xc4,
static const uint8_t point1[32] = {
0xe6, 0xdb, 0x68, 0x67, 0x58, 0x30, 0x30, 0xdb, 0x35, 0x94, 0xc1,
0xa4, 0x24, 0xb1, 0x5f, 0x7c, 0x72, 0x66, 0x24, 0xec, 0x26, 0xb3,
0x35, 0x3b, 0x10, 0xa9, 0x03, 0xa6, 0xd0, 0xab, 0x1c, 0x4c,
static const uint8_t expected1[32] = {
0xc3, 0xda, 0x55, 0x37, 0x9d, 0xe9, 0xc6, 0x90, 0x8e, 0x94, 0xea,
0x4d, 0xf2, 0x8d, 0x08, 0x4f, 0x32, 0xec, 0xcf, 0x03, 0x49, 0x1c,
0x71, 0xf7, 0x54, 0xb4, 0x07, 0x55, 0x77, 0xa2, 0x85, 0x52,
static const uint8_t scalar2[32] = {
0x4b, 0x66, 0xe9, 0xd4, 0xd1, 0xb4, 0x67, 0x3c, 0x5a, 0xd2, 0x26,
0x91, 0x95, 0x7d, 0x6a, 0xf5, 0xc1, 0x1b, 0x64, 0x21, 0xe0, 0xea,
0x01, 0xd4, 0x2c, 0xa4, 0x16, 0x9e, 0x79, 0x18, 0xba, 0x0d,
static const uint8_t point2[32] = {
0xe5, 0x21, 0x0f, 0x12, 0x78, 0x68, 0x11, 0xd3, 0xf4, 0xb7, 0x95,
0x9d, 0x05, 0x38, 0xae, 0x2c, 0x31, 0xdb, 0xe7, 0x10, 0x6f, 0xc0,
0x3c, 0x3e, 0xfc, 0x4c, 0xd5, 0x49, 0xc7, 0x15, 0xa4, 0x93,
static const uint8_t expected2[32] = {
0x95, 0xcb, 0xde, 0x94, 0x76, 0xe8, 0x90, 0x7d, 0x7a, 0xad, 0xe4,
0x5c, 0xb4, 0xb8, 0x73, 0xf8, 0x8b, 0x59, 0x5a, 0x68, 0x79, 0x9f,
0xa1, 0x52, 0xe6, 0xf8, 0xf7, 0x64, 0x7a, 0xac, 0x79, 0x57,
uint8_t out[32];
X25519(out, scalar1, point1);
EXPECT_EQ(0, memcmp(expected1, out, sizeof(out)));
X25519(out, scalar2, point2);
EXPECT_EQ(0, memcmp(expected2, out, sizeof(out)));
TEST(X25519Test, small_order) {
static const uint8_t kSmallOrderPoint[32] = {
0xe0, 0xeb, 0x7a, 0x7c, 0x3b, 0x41, 0xb8, 0xae, 0x16, 0x56, 0xe3,
0xfa, 0xf1, 0x9f, 0xc4, 0x6a, 0xda, 0x09, 0x8d, 0xeb, 0x9c, 0x32,
0xb1, 0xfd, 0x86, 0x62, 0x05, 0x16, 0x5f, 0x49, 0xb8,
uint8_t out[32], private_key[32];
memset(private_key, 0x11, sizeof(private_key));
EXPECT_FALSE(X25519(out, private_key, kSmallOrderPoint));
TEST(X25519Test, iterated) {
// Taken from
static const uint8_t expected_1K[32] = {
0x68, 0x4c, 0xf5, 0x9b, 0xa8, 0x33, 0x09, 0x55, 0x28, 0x00, 0xef,
0x56, 0x6f, 0x2f, 0x4d, 0x3c, 0x1c, 0x38, 0x87, 0xc4, 0x93, 0x60,
0xe3, 0x87, 0x5f, 0x2e, 0xb9, 0x4d, 0x99, 0x53, 0x2c, 0x51,
#ifdef TEST_X25519_1M_ITERATIONS
static const uint8_t expected_1M[32] = {
0x7c, 0x39, 0x11, 0xe0, 0xab, 0x25, 0x86, 0xfd, 0x86, 0x44, 0x97,
0x29, 0x7e, 0x57, 0x5e, 0x6f, 0x3b, 0xc6, 0x01, 0xc0, 0x88, 0x3c,
0x30, 0xdf, 0x5f, 0x4d, 0xd2, 0xd2, 0x4f, 0x66, 0x54, 0x24};
uint8_t scalar[32] = {9}, point[32] = {9}, out[32];
unsigned i;
for (i = 0; i < 1000; i++) {
X25519(out, scalar, point);
memcpy(point, scalar, sizeof(point));
memcpy(scalar, out, sizeof(scalar));
EXPECT_EQ(0, memcmp(expected_1K, scalar, sizeof(expected_1K)));
#ifdef TEST_X25519_1M_ITERATIONS
for (; i < 1000000; i++) {
X25519(out, scalar, point);
memcpy(point, scalar, sizeof(point));
memcpy(scalar, out, sizeof(scalar));
if ((i % 10000) == 0) {
LOG(INFO) << "Iteration: " << i;
EXPECT_EQ(0, memcmp(expected_1M, scalar, sizeof(expected_1M)));
} // namespace hammerd