1 //
2 // Copyright (C) 2012 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/certificate_checker.h"
18
19 #include <string>
20
21 #include <base/strings/string_util.h>
22 #include <base/strings/stringprintf.h>
23 #include <gmock/gmock.h>
24 #include <gtest/gtest.h>
25
26 #include "update_engine/common/constants.h"
27 #include "update_engine/common/mock_prefs.h"
28 #include "update_engine/mock_certificate_checker.h"
29
30 using std::string;
31 using ::testing::_;
32 using ::testing::DoAll;
33 using ::testing::Return;
34 using ::testing::SetArgPointee;
35 using ::testing::SetArrayArgument;
36
37 namespace chromeos_update_engine {
38
39 class MockCertificateCheckObserver : public CertificateChecker::Observer {
40 public:
41 MOCK_METHOD2(CertificateChecked,
42 void(ServerToCheck server_to_check,
43 CertificateCheckResult result));
44 };
45
46 class CertificateCheckerTest : public testing::Test {
47 protected:
SetUp()48 void SetUp() override {
49 cert_key_ = base::StringPrintf("%s-%d-%d",
50 cert_key_prefix_.c_str(),
51 static_cast<int>(server_to_check_),
52 depth_);
53 cert_checker.Init();
54 cert_checker.SetObserver(&observer_);
55 }
56
TearDown()57 void TearDown() override { cert_checker.SetObserver(nullptr); }
58
59 MockPrefs prefs_;
60 MockOpenSSLWrapper openssl_wrapper_;
61 // Parameters of our mock certificate digest.
62 int depth_{0};
63 unsigned int length_{4};
64 uint8_t digest_[4]{0x17, 0x7D, 0x07, 0x5F};
65 string digest_hex_{"177D075F"};
66 string diff_digest_hex_{"1234ABCD"};
67 string cert_key_prefix_{kPrefsUpdateServerCertificate};
68 ServerToCheck server_to_check_{ServerToCheck::kUpdate};
69 string cert_key_;
70
71 testing::StrictMock<MockCertificateCheckObserver> observer_;
72 CertificateChecker cert_checker{&prefs_, &openssl_wrapper_};
73 };
74
75 // check certificate change, new
TEST_F(CertificateCheckerTest,NewCertificate)76 TEST_F(CertificateCheckerTest, NewCertificate) {
77 EXPECT_CALL(openssl_wrapper_, GetCertificateDigest(nullptr, _, _, _))
78 .WillOnce(DoAll(SetArgPointee<1>(depth_),
79 SetArgPointee<2>(length_),
80 SetArrayArgument<3>(digest_, digest_ + 4),
81 Return(true)));
82 EXPECT_CALL(prefs_, GetString(cert_key_, _)).WillOnce(Return(false));
83 EXPECT_CALL(prefs_, SetString(cert_key_, digest_hex_)).WillOnce(Return(true));
84 EXPECT_CALL(
85 observer_,
86 CertificateChecked(server_to_check_, CertificateCheckResult::kValid));
87 ASSERT_TRUE(
88 cert_checker.CheckCertificateChange(1, nullptr, server_to_check_));
89 }
90
91 // check certificate change, unchanged
TEST_F(CertificateCheckerTest,SameCertificate)92 TEST_F(CertificateCheckerTest, SameCertificate) {
93 EXPECT_CALL(openssl_wrapper_, GetCertificateDigest(nullptr, _, _, _))
94 .WillOnce(DoAll(SetArgPointee<1>(depth_),
95 SetArgPointee<2>(length_),
96 SetArrayArgument<3>(digest_, digest_ + 4),
97 Return(true)));
98 EXPECT_CALL(prefs_, GetString(cert_key_, _))
99 .WillOnce(DoAll(SetArgPointee<1>(digest_hex_), Return(true)));
100 EXPECT_CALL(prefs_, SetString(_, _)).Times(0);
101 EXPECT_CALL(
102 observer_,
103 CertificateChecked(server_to_check_, CertificateCheckResult::kValid));
104 ASSERT_TRUE(
105 cert_checker.CheckCertificateChange(1, nullptr, server_to_check_));
106 }
107
108 // check certificate change, changed
TEST_F(CertificateCheckerTest,ChangedCertificate)109 TEST_F(CertificateCheckerTest, ChangedCertificate) {
110 EXPECT_CALL(openssl_wrapper_, GetCertificateDigest(nullptr, _, _, _))
111 .WillOnce(DoAll(SetArgPointee<1>(depth_),
112 SetArgPointee<2>(length_),
113 SetArrayArgument<3>(digest_, digest_ + 4),
114 Return(true)));
115 EXPECT_CALL(prefs_, GetString(cert_key_, _))
116 .WillOnce(DoAll(SetArgPointee<1>(diff_digest_hex_), Return(true)));
117 EXPECT_CALL(observer_,
118 CertificateChecked(server_to_check_,
119 CertificateCheckResult::kValidChanged));
120 EXPECT_CALL(prefs_, SetString(cert_key_, digest_hex_)).WillOnce(Return(true));
121 ASSERT_TRUE(
122 cert_checker.CheckCertificateChange(1, nullptr, server_to_check_));
123 }
124
125 // check certificate change, failed
TEST_F(CertificateCheckerTest,FailedCertificate)126 TEST_F(CertificateCheckerTest, FailedCertificate) {
127 EXPECT_CALL(
128 observer_,
129 CertificateChecked(server_to_check_, CertificateCheckResult::kFailed));
130 EXPECT_CALL(prefs_, GetString(_, _)).Times(0);
131 EXPECT_CALL(openssl_wrapper_, GetCertificateDigest(_, _, _, _)).Times(0);
132 ASSERT_FALSE(
133 cert_checker.CheckCertificateChange(0, nullptr, server_to_check_));
134 }
135
136 } // namespace chromeos_update_engine
137