1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "crypto/secure_hash.h"
6
7#include <stddef.h>
8#include <stdint.h>
9
10#include <memory>
11#include <string>
12
13#include "crypto/sha2.h"
14#include "testing/gtest/include/gtest/gtest.h"
15
16TEST(SecureHashTest, TestUpdate) {
17  // Example B.3 from FIPS 180-2: long message.
18  std::string input3(500000, 'a');  // 'a' repeated half a million times
19  const int kExpectedHashOfInput3[] = {
20      0xcd, 0xc7, 0x6e, 0x5c, 0x99, 0x14, 0xfb, 0x92, 0x81, 0xa1, 0xc7,
21      0xe2, 0x84, 0xd7, 0x3e, 0x67, 0xf1, 0x80, 0x9a, 0x48, 0xa4, 0x97,
22      0x20, 0x0e, 0x04, 0x6d, 0x39, 0xcc, 0xc7, 0x11, 0x2c, 0xd0};
23
24  uint8_t output3[crypto::kSHA256Length];
25
26  std::unique_ptr<crypto::SecureHash> ctx(
27      crypto::SecureHash::Create(crypto::SecureHash::SHA256));
28  ctx->Update(input3.data(), input3.size());
29  ctx->Update(input3.data(), input3.size());
30
31  ctx->Finish(output3, sizeof(output3));
32  for (size_t i = 0; i < crypto::kSHA256Length; i++)
33    EXPECT_EQ(kExpectedHashOfInput3[i], static_cast<int>(output3[i]));
34}
35
36TEST(SecureHashTest, TestClone) {
37  std::string input1(10001, 'a');  // 'a' repeated 10001 times
38  std::string input2(10001, 'd');  // 'd' repeated 10001 times
39
40  const uint8_t kExpectedHashOfInput1[crypto::kSHA256Length] = {
41      0x0c, 0xab, 0x99, 0xa0, 0x58, 0x60, 0x0f, 0xfa, 0xad, 0x12, 0x92,
42      0xd0, 0xc5, 0x3c, 0x05, 0x48, 0xeb, 0xaf, 0x88, 0xdd, 0x1d, 0x01,
43      0x03, 0x03, 0x45, 0x70, 0x5f, 0x01, 0x8a, 0x81, 0x39, 0x09};
44  const uint8_t kExpectedHashOfInput1And2[crypto::kSHA256Length] = {
45      0x4c, 0x8e, 0x26, 0x5a, 0xc3, 0x85, 0x1f, 0x1f, 0xa5, 0x04, 0x1c,
46      0xc7, 0x88, 0x53, 0x1c, 0xc7, 0x80, 0x47, 0x15, 0xfb, 0x47, 0xff,
47      0x72, 0xb1, 0x28, 0x37, 0xb0, 0x4d, 0x6e, 0x22, 0x2e, 0x4d};
48
49  uint8_t output1[crypto::kSHA256Length];
50  uint8_t output2[crypto::kSHA256Length];
51  uint8_t output3[crypto::kSHA256Length];
52
53  std::unique_ptr<crypto::SecureHash> ctx1(
54      crypto::SecureHash::Create(crypto::SecureHash::SHA256));
55  ctx1->Update(input1.data(), input1.size());
56
57  std::unique_ptr<crypto::SecureHash> ctx2(ctx1->Clone());
58  std::unique_ptr<crypto::SecureHash> ctx3(ctx2->Clone());
59  // At this point, ctx1, ctx2, and ctx3 are all equivalent and represent the
60  // state after hashing input1.
61
62  // Updating ctx1 and ctx2 with input2 should produce equivalent results.
63  ctx1->Update(input2.data(), input2.size());
64  ctx1->Finish(output1, sizeof(output1));
65
66  ctx2->Update(input2.data(), input2.size());
67  ctx2->Finish(output2, sizeof(output2));
68
69  EXPECT_EQ(0, memcmp(output1, output2, crypto::kSHA256Length));
70  EXPECT_EQ(0,
71            memcmp(output1, kExpectedHashOfInput1And2, crypto::kSHA256Length));
72
73  // Finish() ctx3, which should produce the hash of input1.
74  ctx3->Finish(&output3, sizeof(output3));
75  EXPECT_EQ(0, memcmp(output3, kExpectedHashOfInput1, crypto::kSHA256Length));
76}
77
78TEST(SecureHashTest, TestLength) {
79  std::unique_ptr<crypto::SecureHash> ctx(
80      crypto::SecureHash::Create(crypto::SecureHash::SHA256));
81  EXPECT_EQ(crypto::kSHA256Length, ctx->GetHashLength());
82}
83