1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
| //
| // Copyright (C) 2010 The Android Open Source Project
| //
| // Licensed under the Apache License, Version 2.0 (the "License");
| // you may not use this file except in compliance with the License.
| // You may obtain a copy of the License at
| //
| // http://www.apache.org/licenses/LICENSE-2.0
| //
| // Unless required by applicable law or agreed to in writing, software
| // distributed under the License is distributed on an "AS IS" BASIS,
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
| // See the License for the specific language governing permissions and
| // limitations under the License.
| //
|
| #include "update_engine/payload_generator/payload_signer.h"
|
| #include <string>
| #include <vector>
|
| #include <base/logging.h>
| #include <gtest/gtest.h>
|
| #include "update_engine/common/hash_calculator.h"
| #include "update_engine/common/test_utils.h"
| #include "update_engine/common/utils.h"
| #include "update_engine/payload_consumer/payload_constants.h"
| #include "update_engine/payload_consumer/payload_verifier.h"
| #include "update_engine/payload_generator/payload_file.h"
| #include "update_engine/update_metadata.pb.h"
|
| using chromeos_update_engine::test_utils::GetBuildArtifactsPath;
| using std::string;
| using std::vector;
|
| // Note: the test key was generated with the following command:
| // openssl genrsa -out unittest_key.pem 2048
| // The public-key version is created by the build system.
|
| namespace chromeos_update_engine {
|
| const char* kUnittestPrivateKeyPath = "unittest_key.pem";
| const char* kUnittestPublicKeyPath = "unittest_key.pub.pem";
| const char* kUnittestPrivateKey2Path = "unittest_key2.pem";
| const char* kUnittestPublicKey2Path = "unittest_key2.pub.pem";
| const char* kUnittestPrivateKeyRSA4096Path = "unittest_key_RSA4096.pem";
| const char* kUnittestPublicKeyRSA4096Path = "unittest_key_RSA4096.pub.pem";
|
| // Some data and its corresponding hash and signature:
| const char kDataToSign[] = "This is some data to sign.";
|
| // Generated by:
| // echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
| // hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
| const uint8_t kDataHash[] = {0x7a, 0x07, 0xa6, 0x44, 0x08, 0x86, 0x20, 0xa6,
| 0xc1, 0xf8, 0xd9, 0x02, 0x05, 0x63, 0x0d, 0xb7,
| 0xfc, 0x2b, 0xa0, 0xa9, 0x7c, 0x9d, 0x1d, 0x8c,
| 0x01, 0xf5, 0x78, 0x6d, 0xc5, 0x11, 0xb4, 0x06};
|
| // Generated with openssl 1.0, which at the time of this writing, you need
| // to download and install yourself. Here's my command:
| // echo -n 'This is some data to sign.' | openssl dgst -sha256 -binary |
| // ~/local/bin/openssl pkeyutl -sign -inkey unittest_key.pem -pkeyopt
| // digest:sha256 | hexdump -v -e '" " 8/1 "0x%02x, " "\n"'
| const uint8_t kDataSignature[] = {
| 0x9f, 0x86, 0x25, 0x8b, 0xf3, 0xcc, 0xe3, 0x95, 0x5f, 0x45, 0x83, 0xb2,
| 0x66, 0xf0, 0x2a, 0xcf, 0xb7, 0xaa, 0x52, 0x25, 0x7a, 0xdd, 0x9d, 0x65,
| 0xe5, 0xd6, 0x02, 0x4b, 0x37, 0x99, 0x53, 0x06, 0xc2, 0xc9, 0x37, 0x36,
| 0x25, 0x62, 0x09, 0x4f, 0x6b, 0x22, 0xf8, 0xb3, 0x89, 0x14, 0x98, 0x1a,
| 0xbc, 0x30, 0x90, 0x4a, 0x43, 0xf5, 0xea, 0x2e, 0xf0, 0xa4, 0xba, 0xc3,
| 0xa7, 0xa3, 0x44, 0x70, 0xd6, 0xc4, 0x89, 0xd8, 0x45, 0x71, 0xbb, 0xee,
| 0x59, 0x87, 0x3d, 0xd5, 0xe5, 0x40, 0x22, 0x3d, 0x73, 0x7e, 0x2a, 0x58,
| 0x93, 0x8e, 0xcb, 0x9c, 0xf2, 0xbb, 0x4a, 0xc9, 0xd2, 0x2c, 0x52, 0x42,
| 0xb0, 0xd1, 0x13, 0x22, 0xa4, 0x78, 0xc7, 0xc6, 0x3e, 0xf1, 0xdc, 0x4c,
| 0x7b, 0x2d, 0x40, 0xda, 0x58, 0xac, 0x4a, 0x11, 0x96, 0x3d, 0xa0, 0x01,
| 0xf6, 0x96, 0x74, 0xf6, 0x6c, 0x0c, 0x49, 0x69, 0x4e, 0xc1, 0x7e, 0x9f,
| 0x2a, 0x42, 0xdd, 0x15, 0x6b, 0x37, 0x2e, 0x3a, 0xa7, 0xa7, 0x6d, 0x91,
| 0x13, 0xe8, 0x59, 0xde, 0xfe, 0x99, 0x07, 0xd9, 0x34, 0x0f, 0x17, 0xb3,
| 0x05, 0x4c, 0xd2, 0xc6, 0x82, 0xb7, 0x38, 0x36, 0x63, 0x1d, 0x9e, 0x21,
| 0xa6, 0x32, 0xef, 0xf1, 0x65, 0xe6, 0xed, 0x95, 0x25, 0x9b, 0x61, 0xe0,
| 0xba, 0x86, 0xa1, 0x7f, 0xf8, 0xa5, 0x4a, 0x32, 0x1f, 0x15, 0x20, 0x8a,
| 0x41, 0xc5, 0xb0, 0xd9, 0x4a, 0xda, 0x85, 0xf3, 0xdc, 0xa0, 0x98, 0x5d,
| 0x1d, 0x18, 0x9d, 0x2e, 0x42, 0xea, 0x69, 0x13, 0x74, 0x3c, 0x74, 0xf7,
| 0x6d, 0x43, 0xb0, 0x63, 0x90, 0xdb, 0x04, 0xd5, 0x05, 0xc9, 0x73, 0x1f,
| 0x6c, 0xd6, 0xfa, 0x46, 0x4e, 0x0f, 0x33, 0x58, 0x5b, 0x0d, 0x1b, 0x55,
| 0x39, 0xb9, 0x0f, 0x43, 0x37, 0xc0, 0x06, 0x0c, 0x29, 0x93, 0x43, 0xc7,
| 0x43, 0xb9, 0xab, 0x7d};
|
| namespace {
| void SignSampleData(string* out_signature, const vector<string>& private_keys) {
| uint64_t length = 0;
| EXPECT_TRUE(PayloadSigner::SignatureBlobLength(private_keys, &length));
| EXPECT_GT(length, 0U);
| brillo::Blob hash_blob;
| EXPECT_TRUE(HashCalculator::RawHashOfBytes(
| kDataToSign, strlen(kDataToSign), &hash_blob));
| EXPECT_TRUE(
| PayloadSigner::SignHashWithKeys(hash_blob, private_keys, out_signature));
| EXPECT_EQ(length, out_signature->size());
| }
| } // namespace
|
| class PayloadSignerTest : public ::testing::Test {
| protected:
| brillo::Blob hash_data_{std::begin(kDataHash), std::end(kDataHash)};
| };
|
| TEST_F(PayloadSignerTest, SignSimpleTextTest) {
| string signature;
| SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});
|
| // Check the signature itself
| Signatures signatures;
| EXPECT_TRUE(signatures.ParseFromString(signature));
| EXPECT_EQ(1, signatures.signatures_size());
| const Signatures::Signature& sig = signatures.signatures(0);
| EXPECT_EQ(1U, sig.version());
| const string& sig_data = sig.data();
| ASSERT_EQ(arraysize(kDataSignature), sig_data.size());
| for (size_t i = 0; i < arraysize(kDataSignature); i++) {
| EXPECT_EQ(kDataSignature[i], static_cast<uint8_t>(sig_data[i]));
| }
| }
|
| TEST_F(PayloadSignerTest, VerifyAllSignatureTest) {
| string signature;
| SignSampleData(&signature,
| {GetBuildArtifactsPath(kUnittestPrivateKeyPath),
| GetBuildArtifactsPath(kUnittestPrivateKey2Path),
| GetBuildArtifactsPath(kUnittestPrivateKeyRSA4096Path)});
|
| // Either public key should pass the verification.
| string public_key;
| EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKeyPath),
| &public_key));
| EXPECT_TRUE(
| PayloadVerifier::VerifySignature(signature, public_key, hash_data_));
| EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKey2Path),
| &public_key));
| EXPECT_TRUE(
| PayloadVerifier::VerifySignature(signature, public_key, hash_data_));
| EXPECT_TRUE(utils::ReadFile(
| GetBuildArtifactsPath(kUnittestPublicKeyRSA4096Path), &public_key));
| EXPECT_TRUE(
| PayloadVerifier::VerifySignature(signature, public_key, hash_data_));
| }
|
| TEST_F(PayloadSignerTest, VerifySignatureTest) {
| string signature;
| SignSampleData(&signature, {GetBuildArtifactsPath(kUnittestPrivateKeyPath)});
|
| string public_key;
| EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKeyPath),
| &public_key));
| EXPECT_TRUE(
| PayloadVerifier::VerifySignature(signature, public_key, hash_data_));
| // Passing the invalid key should fail the verification.
| EXPECT_TRUE(utils::ReadFile(GetBuildArtifactsPath(kUnittestPublicKey2Path),
| &public_key));
| EXPECT_TRUE(
| PayloadVerifier::VerifySignature(signature, public_key, hash_data_));
| }
|
| TEST_F(PayloadSignerTest, SkipMetadataSignatureTest) {
| test_utils::ScopedTempFile payload_file("payload.XXXXXX");
| PayloadGenerationConfig config;
| config.version.major = kBrilloMajorPayloadVersion;
| PayloadFile payload;
| EXPECT_TRUE(payload.Init(config));
| uint64_t metadata_size;
| EXPECT_TRUE(payload.WritePayload(
| payload_file.path(), "/dev/null", "", &metadata_size));
| const vector<int> sizes = {256};
| brillo::Blob unsigned_payload_hash, unsigned_metadata_hash;
| EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(payload_file.path(),
| sizes,
| &unsigned_payload_hash,
| &unsigned_metadata_hash));
| EXPECT_TRUE(
| payload.WritePayload(payload_file.path(),
| "/dev/null",
| GetBuildArtifactsPath(kUnittestPrivateKeyPath),
| &metadata_size));
| brillo::Blob signed_payload_hash, signed_metadata_hash;
| EXPECT_TRUE(PayloadSigner::HashPayloadForSigning(
| payload_file.path(), sizes, &signed_payload_hash, &signed_metadata_hash));
| EXPECT_EQ(unsigned_payload_hash, signed_payload_hash);
| EXPECT_EQ(unsigned_metadata_hash, signed_metadata_hash);
| }
|
| TEST_F(PayloadSignerTest, VerifySignedPayloadTest) {
| test_utils::ScopedTempFile payload_file("payload.XXXXXX");
| PayloadGenerationConfig config;
| config.version.major = kBrilloMajorPayloadVersion;
| PayloadFile payload;
| EXPECT_TRUE(payload.Init(config));
| uint64_t metadata_size;
| EXPECT_TRUE(
| payload.WritePayload(payload_file.path(),
| "/dev/null",
| GetBuildArtifactsPath(kUnittestPrivateKeyPath),
| &metadata_size));
| EXPECT_TRUE(PayloadSigner::VerifySignedPayload(
| payload_file.path(), GetBuildArtifactsPath(kUnittestPublicKeyPath)));
| }
|
| } // namespace chromeos_update_engine
|
|
