1 //
2 // Copyright (C) 2009 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "update_engine/common/hash_calculator.h"
18
19 #include <math.h>
20 #include <unistd.h>
21
22 #include <string>
23 #include <vector>
24
25 #include <brillo/secure_blob.h>
26 #include <gtest/gtest.h>
27
28 #include "update_engine/common/utils.h"
29
30 using std::string;
31 using std::vector;
32
33 namespace chromeos_update_engine {
34
35 // Generated by running this on a linux shell:
36 // $ echo -n hi | openssl dgst -sha256 -binary | openssl base64
37 static const char kExpectedHash[] =
38 "j0NDRmSPa5bfid2pAcUXaxCm2Dlh3TwayItZstwyeqQ=";
39 static const uint8_t kExpectedRawHash[] = {
40 0x8f, 0x43, 0x43, 0x46, 0x64, 0x8f, 0x6b, 0x96,
41 0xdf, 0x89, 0xdd, 0xa9, 0x01, 0xc5, 0x17, 0x6b,
42 0x10, 0xa6, 0xd8, 0x39, 0x61, 0xdd, 0x3c, 0x1a,
43 0xc8, 0x8b, 0x59, 0xb2, 0xdc, 0x32, 0x7a, 0xa4
44 };
45
46 class HashCalculatorTest : public ::testing::Test {
47 public:
HashCalculatorTest()48 HashCalculatorTest() {}
49 };
50
TEST_F(HashCalculatorTest,SimpleTest)51 TEST_F(HashCalculatorTest, SimpleTest) {
52 HashCalculator calc;
53 calc.Update("hi", 2);
54 calc.Finalize();
55 EXPECT_EQ(kExpectedHash, calc.hash());
56 brillo::Blob raw_hash(std::begin(kExpectedRawHash),
57 std::end(kExpectedRawHash));
58 EXPECT_TRUE(raw_hash == calc.raw_hash());
59 }
60
TEST_F(HashCalculatorTest,MultiUpdateTest)61 TEST_F(HashCalculatorTest, MultiUpdateTest) {
62 HashCalculator calc;
63 calc.Update("h", 1);
64 calc.Update("i", 1);
65 calc.Finalize();
66 EXPECT_EQ(kExpectedHash, calc.hash());
67 brillo::Blob raw_hash(std::begin(kExpectedRawHash),
68 std::end(kExpectedRawHash));
69 EXPECT_TRUE(raw_hash == calc.raw_hash());
70 }
71
TEST_F(HashCalculatorTest,ContextTest)72 TEST_F(HashCalculatorTest, ContextTest) {
73 HashCalculator calc;
74 calc.Update("h", 1);
75 string calc_context = calc.GetContext();
76 calc.Finalize();
77 HashCalculator calc_next;
78 calc_next.SetContext(calc_context);
79 calc_next.Update("i", 1);
80 calc_next.Finalize();
81 EXPECT_EQ(kExpectedHash, calc_next.hash());
82 brillo::Blob raw_hash(std::begin(kExpectedRawHash),
83 std::end(kExpectedRawHash));
84 EXPECT_TRUE(raw_hash == calc_next.raw_hash());
85 }
86
TEST_F(HashCalculatorTest,BigTest)87 TEST_F(HashCalculatorTest, BigTest) {
88 HashCalculator calc;
89
90 int digit_count = 1;
91 int next_overflow = 10;
92 for (int i = 0; i < 1000000; i++) {
93 char buf[8];
94 if (i == next_overflow) {
95 next_overflow *= 10;
96 digit_count++;
97 }
98 ASSERT_EQ(digit_count, snprintf(buf, sizeof(buf), "%d", i)) << " i = " << i;
99 calc.Update(buf, strlen(buf));
100 }
101 calc.Finalize();
102
103 // Hash constant generated by running this on a linux shell:
104 // $ C=0
105 // $ while [ $C -lt 1000000 ]; do
106 // echo -n $C
107 // let C=C+1
108 // done | openssl dgst -sha256 -binary | openssl base64
109 EXPECT_EQ("NZf8k6SPBkYMvhaX8YgzuMgbkLP1XZ+neM8K5wcSsf8=", calc.hash());
110 }
111
TEST_F(HashCalculatorTest,UpdateFileSimpleTest)112 TEST_F(HashCalculatorTest, UpdateFileSimpleTest) {
113 string data_path;
114 ASSERT_TRUE(
115 utils::MakeTempFile("data.XXXXXX", &data_path, nullptr));
116 ScopedPathUnlinker data_path_unlinker(data_path);
117 ASSERT_TRUE(utils::WriteFile(data_path.c_str(), "hi", 2));
118
119 static const int kLengths[] = { -1, 2, 10 };
120 for (size_t i = 0; i < arraysize(kLengths); i++) {
121 HashCalculator calc;
122 EXPECT_EQ(2, calc.UpdateFile(data_path, kLengths[i]));
123 EXPECT_TRUE(calc.Finalize());
124 EXPECT_EQ(kExpectedHash, calc.hash());
125 brillo::Blob raw_hash(std::begin(kExpectedRawHash),
126 std::end(kExpectedRawHash));
127 EXPECT_TRUE(raw_hash == calc.raw_hash());
128 }
129
130 HashCalculator calc;
131 EXPECT_EQ(0, calc.UpdateFile(data_path, 0));
132 EXPECT_EQ(1, calc.UpdateFile(data_path, 1));
133 EXPECT_TRUE(calc.Finalize());
134 // echo -n h | openssl dgst -sha256 -binary | openssl base64
135 EXPECT_EQ("qqlAJmTxpB9A67xSyZk+tmrrNmYClY/fqig7ceZNsSM=", calc.hash());
136 }
137
TEST_F(HashCalculatorTest,RawHashOfFileSimpleTest)138 TEST_F(HashCalculatorTest, RawHashOfFileSimpleTest) {
139 string data_path;
140 ASSERT_TRUE(
141 utils::MakeTempFile("data.XXXXXX", &data_path, nullptr));
142 ScopedPathUnlinker data_path_unlinker(data_path);
143 ASSERT_TRUE(utils::WriteFile(data_path.c_str(), "hi", 2));
144
145 static const int kLengths[] = { -1, 2, 10 };
146 for (size_t i = 0; i < arraysize(kLengths); i++) {
147 brillo::Blob exp_raw_hash(std::begin(kExpectedRawHash),
148 std::end(kExpectedRawHash));
149 brillo::Blob raw_hash;
150 EXPECT_EQ(2, HashCalculator::RawHashOfFile(data_path,
151 kLengths[i],
152 &raw_hash));
153 EXPECT_TRUE(exp_raw_hash == raw_hash);
154 }
155 }
156
TEST_F(HashCalculatorTest,UpdateFileNonexistentTest)157 TEST_F(HashCalculatorTest, UpdateFileNonexistentTest) {
158 HashCalculator calc;
159 EXPECT_EQ(-1, calc.UpdateFile("/some/non-existent/file", -1));
160 }
161
TEST_F(HashCalculatorTest,AbortTest)162 TEST_F(HashCalculatorTest, AbortTest) {
163 // Just make sure we don't crash and valgrind doesn't detect memory leaks
164 {
165 HashCalculator calc;
166 }
167 {
168 HashCalculator calc;
169 calc.Update("h", 1);
170 }
171 }
172
173 } // namespace chromeos_update_engine
174