1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include "avb_unittest_util.h"
26
27 #include <android-base/file.h>
28
mem_to_hexstring(const uint8_t * data,size_t len)29 std::string mem_to_hexstring(const uint8_t* data, size_t len) {
30 std::string ret;
31 char digits[17] = "0123456789abcdef";
32 for (size_t n = 0; n < len; n++) {
33 ret.push_back(digits[data[n] >> 4]);
34 ret.push_back(digits[data[n] & 0x0f]);
35 }
36 return ret;
37 }
38
string_trim(const std::string & str)39 std::string string_trim(const std::string& str) {
40 size_t first = str.find_first_not_of(" \t\n");
41 if (first == std::string::npos) {
42 return str;
43 }
44 size_t last = str.find_last_not_of(" \t\n");
45 return str.substr(first, (last - first + 1));
46 }
47
48 namespace avb {
49
SetUp()50 void BaseAvbToolTest::SetUp() {
51 /* Change current directory to test executable directory so that relative path
52 * references to test dependencies don't rely on being manually run from
53 * correct directory */
54 base::SetCurrentDirectory(
55 base::FilePath(android::base::GetExecutableDirectory()));
56
57 /* Create temporary directory to stash images in. */
58 base::FilePath ret;
59 char* buf = strdup("/tmp/libavb-tests.XXXXXX");
60 ASSERT_TRUE(mkdtemp(buf) != nullptr);
61 testdir_ = base::FilePath(buf);
62 free(buf);
63
64 /* Reset memory leak tracing */
65 avb::testing_memory_reset();
66 }
67
TearDown()68 void BaseAvbToolTest::TearDown() {
69 /* Nuke temporary directory. */
70 ASSERT_EQ(0U, testdir_.value().find("/tmp/libavb-tests"));
71 ASSERT_TRUE(base::DeleteFile(testdir_, true /* recursive */));
72 /* Ensure all memory has been freed. */
73 EXPECT_TRUE(avb::testing_memory_all_freed());
74 }
75
CalcVBMetaDigest(const std::string & vbmeta_image,const std::string & digest_alg)76 std::string BaseAvbToolTest::CalcVBMetaDigest(const std::string& vbmeta_image,
77 const std::string& digest_alg) {
78 base::FilePath vbmeta_path = testdir_.Append(vbmeta_image);
79 base::FilePath vbmeta_digest_path = testdir_.Append("vbmeta_digest");
80 EXPECT_COMMAND(
81 0,
82 "./avbtool calculate_vbmeta_digest --image %s --hash_algorithm %s"
83 " --output %s",
84 vbmeta_path.value().c_str(),
85 digest_alg.c_str(),
86 vbmeta_digest_path.value().c_str());
87 std::string vbmeta_digest_data;
88 EXPECT_TRUE(base::ReadFileToString(vbmeta_digest_path, &vbmeta_digest_data));
89 return string_trim(vbmeta_digest_data);
90 }
91
GenerateVBMetaImage(const std::string & image_name,const std::string & algorithm,uint64_t rollback_index,const base::FilePath & key_path,const std::string & additional_options)92 void BaseAvbToolTest::GenerateVBMetaImage(
93 const std::string& image_name,
94 const std::string& algorithm,
95 uint64_t rollback_index,
96 const base::FilePath& key_path,
97 const std::string& additional_options) {
98 std::string signing_options;
99 if (algorithm == "") {
100 signing_options = " --algorithm NONE ";
101 } else {
102 signing_options = std::string(" --algorithm ") + algorithm + " --key " +
103 key_path.value() + " ";
104 }
105 vbmeta_image_path_ = testdir_.Append(image_name);
106 EXPECT_COMMAND(0,
107 "./avbtool make_vbmeta_image"
108 " --rollback_index %" PRIu64
109 " %s %s "
110 " --output %s",
111 rollback_index,
112 additional_options.c_str(),
113 signing_options.c_str(),
114 vbmeta_image_path_.value().c_str());
115 int64_t file_size;
116 ASSERT_TRUE(base::GetFileSize(vbmeta_image_path_, &file_size));
117 vbmeta_image_.resize(file_size);
118 ASSERT_TRUE(base::ReadFile(vbmeta_image_path_,
119 reinterpret_cast<char*>(vbmeta_image_.data()),
120 vbmeta_image_.size()));
121 }
122
123 /* Generate a file with name |file_name| of size |image_size| with
124 * known content (0x00 0x01 0x02 .. 0xff 0x00 0x01 ..).
125 */
GenerateImage(const std::string file_name,size_t image_size,uint8_t start_byte)126 base::FilePath BaseAvbToolTest::GenerateImage(const std::string file_name,
127 size_t image_size,
128 uint8_t start_byte) {
129 std::vector<uint8_t> image;
130 image.resize(image_size);
131 for (size_t n = 0; n < image_size; n++) {
132 image[n] = uint8_t(n + start_byte);
133 }
134 base::FilePath image_path = testdir_.Append(file_name);
135 EXPECT_EQ(image_size,
136 static_cast<const size_t>(
137 base::WriteFile(image_path,
138 reinterpret_cast<const char*>(image.data()),
139 image.size())));
140 return image_path;
141 }
142
InfoImage(const base::FilePath & image_path)143 std::string BaseAvbToolTest::InfoImage(const base::FilePath& image_path) {
144 base::FilePath tmp_path = testdir_.Append("info_output.txt");
145 EXPECT_COMMAND(0,
146 "./avbtool info_image --image %s --output %s",
147 image_path.value().c_str(),
148 tmp_path.value().c_str());
149 std::string info_data;
150 EXPECT_TRUE(base::ReadFileToString(tmp_path, &info_data));
151 return info_data;
152 }
153
PublicKeyAVB(const base::FilePath & key_path)154 std::string BaseAvbToolTest::PublicKeyAVB(const base::FilePath& key_path) {
155 base::FilePath tmp_path = testdir_.Append("public_key.bin");
156 EXPECT_COMMAND(0,
157 "./avbtool extract_public_key --key %s"
158 " --output %s",
159 key_path.value().c_str(),
160 tmp_path.value().c_str());
161 std::string key_data;
162 EXPECT_TRUE(base::ReadFileToString(tmp_path, &key_data));
163 return key_data;
164 }
165
166 } // namespace avb
167