payload_signer_unittest.cc revision f68bbbc952aa9a71898e4939b5f36187fa564a50 
1// Copyright (c) 2010 The Chromium OS 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 "update_engine/payload_generator/payload_signer.h"
6
7#include <string>
8#include <vector>
9
10#include <base/logging.h>
11#include <gtest/gtest.h>
12
13#include "update_engine/payload_verifier.h"
14#include "update_engine/update_metadata.pb.h"
15#include "update_engine/utils.h"
16
17using std::string;
18using std::vector;
19
20// Note: the test key was generated with the following command:
21// openssl genrsa -out unittest_key.pem 2048
22// The public-key version is created by the build system.
23
24namespace chromeos_update_engine {
25
26const char* kUnittestPrivateKeyPath = "unittest_key.pem";
27const char* kUnittestPublicKeyPath = "unittest_key.pub.pem";
28const char* kUnittestPrivateKey2Path = "unittest_key2.pem";
29const char* kUnittestPublicKey2Path = "unittest_key2.pub.pem";
30
31// Some data and its corresponding hash and signature:
32const char kDataToSign[] = "This is some data to sign.";
33
34// Generated by:
35// echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
36//   hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
37const uint8_t kDataHash[] = {
38  0x7a, 0x07, 0xa6, 0x44, 0x08, 0x86, 0x20, 0xa6,
39  0xc1, 0xf8, 0xd9, 0x02, 0x05, 0x63, 0x0d, 0xb7,
40  0xfc, 0x2b, 0xa0, 0xa9, 0x7c, 0x9d, 0x1d, 0x8c,
41  0x01, 0xf5, 0x78, 0x6d, 0xc5, 0x11, 0xb4, 0x06
42};
43
44// Generated with openssl 1.0, which at the time of this writing, you need
45// to download and install yourself. Here's my command:
46// echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
47//    ~/local/bin/openssl pkeyutl -sign -inkey unittest_key.pem -pkeyopt
48//    digest:sha256 | hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
49const uint8_t kDataSignature[] = {
50  0x9f, 0x86, 0x25, 0x8b, 0xf3, 0xcc, 0xe3, 0x95,
51  0x5f, 0x45, 0x83, 0xb2, 0x66, 0xf0, 0x2a, 0xcf,
52  0xb7, 0xaa, 0x52, 0x25, 0x7a, 0xdd, 0x9d, 0x65,
53  0xe5, 0xd6, 0x02, 0x4b, 0x37, 0x99, 0x53, 0x06,
54  0xc2, 0xc9, 0x37, 0x36, 0x25, 0x62, 0x09, 0x4f,
55  0x6b, 0x22, 0xf8, 0xb3, 0x89, 0x14, 0x98, 0x1a,
56  0xbc, 0x30, 0x90, 0x4a, 0x43, 0xf5, 0xea, 0x2e,
57  0xf0, 0xa4, 0xba, 0xc3, 0xa7, 0xa3, 0x44, 0x70,
58  0xd6, 0xc4, 0x89, 0xd8, 0x45, 0x71, 0xbb, 0xee,
59  0x59, 0x87, 0x3d, 0xd5, 0xe5, 0x40, 0x22, 0x3d,
60  0x73, 0x7e, 0x2a, 0x58, 0x93, 0x8e, 0xcb, 0x9c,
61  0xf2, 0xbb, 0x4a, 0xc9, 0xd2, 0x2c, 0x52, 0x42,
62  0xb0, 0xd1, 0x13, 0x22, 0xa4, 0x78, 0xc7, 0xc6,
63  0x3e, 0xf1, 0xdc, 0x4c, 0x7b, 0x2d, 0x40, 0xda,
64  0x58, 0xac, 0x4a, 0x11, 0x96, 0x3d, 0xa0, 0x01,
65  0xf6, 0x96, 0x74, 0xf6, 0x6c, 0x0c, 0x49, 0x69,
66  0x4e, 0xc1, 0x7e, 0x9f, 0x2a, 0x42, 0xdd, 0x15,
67  0x6b, 0x37, 0x2e, 0x3a, 0xa7, 0xa7, 0x6d, 0x91,
68  0x13, 0xe8, 0x59, 0xde, 0xfe, 0x99, 0x07, 0xd9,
69  0x34, 0x0f, 0x17, 0xb3, 0x05, 0x4c, 0xd2, 0xc6,
70  0x82, 0xb7, 0x38, 0x36, 0x63, 0x1d, 0x9e, 0x21,
71  0xa6, 0x32, 0xef, 0xf1, 0x65, 0xe6, 0xed, 0x95,
72  0x25, 0x9b, 0x61, 0xe0, 0xba, 0x86, 0xa1, 0x7f,
73  0xf8, 0xa5, 0x4a, 0x32, 0x1f, 0x15, 0x20, 0x8a,
74  0x41, 0xc5, 0xb0, 0xd9, 0x4a, 0xda, 0x85, 0xf3,
75  0xdc, 0xa0, 0x98, 0x5d, 0x1d, 0x18, 0x9d, 0x2e,
76  0x42, 0xea, 0x69, 0x13, 0x74, 0x3c, 0x74, 0xf7,
77  0x6d, 0x43, 0xb0, 0x63, 0x90, 0xdb, 0x04, 0xd5,
78  0x05, 0xc9, 0x73, 0x1f, 0x6c, 0xd6, 0xfa, 0x46,
79  0x4e, 0x0f, 0x33, 0x58, 0x5b, 0x0d, 0x1b, 0x55,
80  0x39, 0xb9, 0x0f, 0x43, 0x37, 0xc0, 0x06, 0x0c,
81  0x29, 0x93, 0x43, 0xc7, 0x43, 0xb9, 0xab, 0x7d
82};
83
84namespace {
85void SignSampleData(chromeos::Blob* out_signature_blob) {
86  string data_path;
87  ASSERT_TRUE(
88      utils::MakeTempFile("data.XXXXXX", &data_path, nullptr));
89  ScopedPathUnlinker data_path_unlinker(data_path);
90  ASSERT_TRUE(utils::WriteFile(data_path.c_str(),
91                               kDataToSign,
92                               strlen(kDataToSign)));
93  uint64_t length = 0;
94  EXPECT_TRUE(PayloadSigner::SignatureBlobLength(
95      vector<string> (1, kUnittestPrivateKeyPath),
96      &length));
97  EXPECT_GT(length, 0);
98  EXPECT_TRUE(PayloadSigner::SignPayload(
99      data_path,
100      vector<string>(1, kUnittestPrivateKeyPath),
101      out_signature_blob));
102  EXPECT_EQ(length, out_signature_blob->size());
103}
104}  // namespace
105
106TEST(PayloadSignerTest, SimpleTest) {
107  chromeos::Blob signature_blob;
108  SignSampleData(&signature_blob);
109
110  // Check the signature itself
111  Signatures signatures;
112  EXPECT_TRUE(signatures.ParseFromArray(signature_blob.data(),
113                                        signature_blob.size()));
114  EXPECT_EQ(1, signatures.signatures_size());
115  const Signatures_Signature& signature = signatures.signatures(0);
116  EXPECT_EQ(kSignatureMessageOriginalVersion, signature.version());
117  const string sig_data = signature.data();
118  ASSERT_EQ(arraysize(kDataSignature), sig_data.size());
119  for (size_t i = 0; i < arraysize(kDataSignature); i++) {
120    EXPECT_EQ(kDataSignature[i], static_cast<uint8_t>(sig_data[i]));
121  }
122}
123
124TEST(PayloadSignerTest, VerifySignatureTest) {
125  chromeos::Blob signature_blob;
126  SignSampleData(&signature_blob);
127
128  chromeos::Blob hash_data;
129  EXPECT_TRUE(PayloadVerifier::VerifySignature(signature_blob,
130                                             kUnittestPublicKeyPath,
131                                             &hash_data));
132  chromeos::Blob padded_hash_data(std::begin(kDataHash), std::end(kDataHash));
133  PayloadVerifier::PadRSA2048SHA256Hash(&padded_hash_data);
134  ASSERT_EQ(padded_hash_data.size(), hash_data.size());
135  for (size_t i = 0; i < padded_hash_data.size(); i++) {
136    EXPECT_EQ(padded_hash_data[i], hash_data[i]);
137  }
138}
139
140}  // namespace chromeos_update_engine
141