OLD | NEW |
1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/safe_browsing/module_integrity_verifier_win.h" | 5 #include "chrome/browser/safe_browsing/module_integrity_verifier_win.h" |
6 | 6 |
7 #include "base/files/file_path.h" | 7 #include "base/files/file_path.h" |
8 #include "base/files/memory_mapped_file.h" | 8 #include "base/files/memory_mapped_file.h" |
9 #include "base/native_library.h" | 9 #include "base/native_library.h" |
10 #include "base/path_service.h" | 10 #include "base/path_service.h" |
11 #include "base/scoped_native_library.h" | 11 #include "base/scoped_native_library.h" |
12 #include "base/win/pe_image.h" | 12 #include "base/win/pe_image.h" |
13 #include "testing/gtest/include/gtest/gtest.h" | 13 #include "testing/gtest/include/gtest/gtest.h" |
14 | 14 |
15 namespace safe_browsing { | 15 namespace safe_browsing { |
16 | 16 |
17 namespace { | |
18 | |
19 const wchar_t kTestDllName[] = L"verifier_test_dll.dll"; | |
20 const char kTestExportName[] = "DummyExport"; | |
21 | |
22 } // namespace | |
23 | |
24 class SafeBrowsingModuleVerifierTest : public testing::Test { | 17 class SafeBrowsingModuleVerifierTest : public testing::Test { |
25 protected: | 18 protected: |
26 base::ScopedNativeLibrary mem_dll_handle_; | 19 base::ScopedNativeLibrary mem_dll_handle_; |
27 base::MemoryMappedFile disk_dll_handle_; | 20 base::MemoryMappedFile disk_dll_handle_; |
28 scoped_ptr<base::win::PEImageAsData> disk_peimage_ptr_; | 21 scoped_ptr<base::win::PEImageAsData> disk_peimage_ptr_; |
29 scoped_ptr<base::win::PEImage> mem_peimage_ptr_; | 22 scoped_ptr<base::win::PEImage> mem_peimage_ptr_; |
30 | 23 |
31 void SetUpTestDllAndPEImages() { | 24 void SetUpTestDllAndPEImages() { |
32 LoadModule(); | 25 LoadModule(); |
33 HMODULE mem_handle; | 26 HMODULE mem_handle; |
34 GetMemModuleHandle(&mem_handle); | 27 GetMemModuleHandle(&mem_handle); |
35 mem_peimage_ptr_.reset(new base::win::PEImage(mem_handle)); | 28 mem_peimage_ptr_.reset(new base::win::PEImage(mem_handle)); |
36 ASSERT_TRUE(mem_peimage_ptr_->VerifyMagic()); | 29 ASSERT_TRUE(mem_peimage_ptr_->VerifyMagic()); |
37 | 30 |
38 LoadDLLAsFile(); | 31 LoadDLLAsFile(); |
39 HMODULE disk_handle; | 32 HMODULE disk_handle; |
40 GetDiskModuleHandle(&disk_handle); | 33 GetDiskModuleHandle(&disk_handle); |
41 disk_peimage_ptr_.reset(new base::win::PEImageAsData(disk_handle)); | 34 disk_peimage_ptr_.reset(new base::win::PEImageAsData(disk_handle)); |
42 ASSERT_TRUE(disk_peimage_ptr_->VerifyMagic()); | 35 ASSERT_TRUE(disk_peimage_ptr_->VerifyMagic()); |
43 } | 36 } |
44 | 37 |
45 void LoadModule() { | 38 void LoadModule() { |
46 mem_dll_handle_.Reset( | 39 mem_dll_handle_.Reset( |
47 LoadNativeLibrary(base::FilePath(kTestDllName), NULL)); | 40 LoadNativeLibrary(base::FilePath(test_dll_names[0]), NULL)); |
48 ASSERT_TRUE(mem_dll_handle_.is_valid()); | 41 ASSERT_TRUE(mem_dll_handle_.is_valid()); |
49 } | 42 } |
50 | 43 |
51 void GetMemModuleHandle(HMODULE* mem_handle) { | 44 void GetMemModuleHandle(HMODULE* mem_handle) { |
52 *mem_handle = GetModuleHandle(kTestDllName); | 45 *mem_handle = GetModuleHandle(test_dll_names[0]); |
53 ASSERT_NE(static_cast<HMODULE>(NULL), *mem_handle); | 46 ASSERT_NE(static_cast<HMODULE>(NULL), *mem_handle); |
54 } | 47 } |
55 | 48 |
56 void LoadDLLAsFile() { | 49 void LoadDLLAsFile() { |
57 // Use the module handle to find the it on disk, then load as a file. | 50 // Use the module handle to find the it on disk, then load as a file. |
58 HMODULE module_handle; | 51 HMODULE module_handle; |
59 GetMemModuleHandle(&module_handle); | 52 GetMemModuleHandle(&module_handle); |
60 | 53 |
61 WCHAR module_path[MAX_PATH] = {}; | 54 WCHAR module_path[MAX_PATH] = {}; |
62 DWORD length = | 55 DWORD length = |
(...skipping 24 matching lines...) Expand all Loading... |
87 1, | 80 1, |
88 &bytes_written); | 81 &bytes_written); |
89 EXPECT_EQ(1, bytes_written); | 82 EXPECT_EQ(1, bytes_written); |
90 } | 83 } |
91 }; | 84 }; |
92 | 85 |
93 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleUnmodified) { | 86 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleUnmodified) { |
94 std::set<std::string> modified_exports; | 87 std::set<std::string> modified_exports; |
95 // Call VerifyModule before the module has been loaded, should fail. | 88 // Call VerifyModule before the module has been loaded, should fail. |
96 EXPECT_EQ(MODULE_STATE_UNKNOWN, | 89 EXPECT_EQ(MODULE_STATE_UNKNOWN, |
97 VerifyModule(kTestDllName, &modified_exports)); | 90 VerifyModule(test_dll_names[0], &modified_exports)); |
98 EXPECT_EQ(0, modified_exports.size()); | 91 EXPECT_EQ(0, modified_exports.size()); |
99 | 92 |
100 // On loading, the module should be identical (up to relocations) in memory as | 93 // On loading, the module should be identical (up to relocations) in memory as |
101 // on disk. | 94 // on disk. |
102 SetUpTestDllAndPEImages(); | 95 SetUpTestDllAndPEImages(); |
103 EXPECT_EQ(MODULE_STATE_UNMODIFIED, | 96 EXPECT_EQ(MODULE_STATE_UNMODIFIED, |
104 VerifyModule(kTestDllName, &modified_exports)); | 97 VerifyModule(test_dll_names[0], &modified_exports)); |
105 EXPECT_EQ(0, modified_exports.size()); | 98 EXPECT_EQ(0, modified_exports.size()); |
106 } | 99 } |
107 | 100 |
108 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleModified) { | 101 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleModified) { |
109 std::set<std::string> modified_exports; | 102 std::set<std::string> modified_exports; |
110 // Confirm the module is identical in memory as on disk before we begin. | 103 // Confirm the module is identical in memory as on disk before we begin. |
111 SetUpTestDllAndPEImages(); | 104 SetUpTestDllAndPEImages(); |
112 EXPECT_EQ(MODULE_STATE_UNMODIFIED, | 105 EXPECT_EQ(MODULE_STATE_UNMODIFIED, |
113 VerifyModule(kTestDllName, &modified_exports)); | 106 VerifyModule(test_dll_names[0], &modified_exports)); |
114 | 107 |
115 uint8_t* mem_code_addr = NULL; | 108 uint8_t* mem_code_addr = NULL; |
116 uint8_t* disk_code_addr = NULL; | 109 uint8_t* disk_code_addr = NULL; |
117 uint32_t code_size = 0; | 110 uint32_t code_size = 0; |
118 EXPECT_TRUE(GetCodeAddrsAndSize(*mem_peimage_ptr_, | 111 EXPECT_TRUE(GetCodeAddrsAndSize(*mem_peimage_ptr_, |
119 *disk_peimage_ptr_, | 112 *disk_peimage_ptr_, |
120 &mem_code_addr, | 113 &mem_code_addr, |
121 &disk_code_addr, | 114 &disk_code_addr, |
122 &code_size)); | 115 &code_size)); |
123 | 116 |
124 // Edit the first byte of the code section of the module (this may be before | 117 // Edit the first byte of the code section of the module (this may be before |
125 // the address of any export). | 118 // the address of any export). |
126 uint8_t new_val = (*mem_code_addr) + 1; | 119 uint8_t new_val = (*mem_code_addr) + 1; |
127 SIZE_T bytes_written = 0; | 120 SIZE_T bytes_written = 0; |
128 WriteProcessMemory(GetCurrentProcess(), | 121 WriteProcessMemory(GetCurrentProcess(), |
129 mem_code_addr, | 122 mem_code_addr, |
130 reinterpret_cast<void*>(&new_val), | 123 reinterpret_cast<void*>(&new_val), |
131 1, | 124 1, |
132 &bytes_written); | 125 &bytes_written); |
133 EXPECT_EQ(1, bytes_written); | 126 EXPECT_EQ(1, bytes_written); |
134 | 127 |
135 // VerifyModule should detect the change. | 128 // VerifyModule should detect the change. |
136 EXPECT_EQ(MODULE_STATE_MODIFIED, | 129 EXPECT_EQ(MODULE_STATE_MODIFIED, |
137 VerifyModule(kTestDllName, &modified_exports)); | 130 VerifyModule(test_dll_names[0], &modified_exports)); |
138 } | 131 } |
139 | 132 |
140 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleExportModified) { | 133 TEST_F(SafeBrowsingModuleVerifierTest, VerifyModuleExportModified) { |
141 std::set<std::string> modified_exports; | 134 std::set<std::string> modified_exports; |
142 // Confirm the module is identical in memory as on disk before we begin. | 135 // Confirm the module is identical in memory as on disk before we begin. |
143 SetUpTestDllAndPEImages(); | 136 SetUpTestDllAndPEImages(); |
144 EXPECT_EQ(MODULE_STATE_UNMODIFIED, | 137 EXPECT_EQ(MODULE_STATE_UNMODIFIED, |
145 VerifyModule(kTestDllName, &modified_exports)); | 138 VerifyModule(test_dll_names[0], &modified_exports)); |
146 modified_exports.clear(); | 139 modified_exports.clear(); |
147 | 140 |
148 // Edit the exported function, VerifyModule should now return the function | 141 // Edit the exported function, VerifyModule should now return the function |
149 // name in modified_exports. | 142 // name in modified_exports. |
150 EditExport(); | 143 EditExport(); |
151 EXPECT_EQ(MODULE_STATE_MODIFIED, | 144 EXPECT_EQ(MODULE_STATE_MODIFIED, |
152 VerifyModule(kTestDllName, &modified_exports)); | 145 VerifyModule(test_dll_names[0], &modified_exports)); |
153 EXPECT_EQ(1, modified_exports.size()); | 146 EXPECT_EQ(1, modified_exports.size()); |
154 EXPECT_EQ(0, std::string(kTestExportName).compare(*modified_exports.begin())); | 147 EXPECT_EQ(0, std::string(kTestExportName).compare(*modified_exports.begin())); |
155 } | 148 } |
156 | 149 |
157 } // namespace safe_browsing | 150 } // namespace safe_browsing |
OLD | NEW |