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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/common/component_flash_hint_file_linux.h" |
| 6 |
| 7 #include <errno.h> |
| 8 #include <stdlib.h> |
| 9 #include <sys/mount.h> |
| 10 |
| 11 #include "base/files/file_util.h" |
| 12 #include "base/files/scoped_temp_dir.h" |
| 13 #include "base/path_service.h" |
| 14 #include "base/process/kill.h" |
| 15 #include "base/test/multiprocess_test.h" |
| 16 #include "base/test/scoped_path_override.h" |
| 17 #include "base/test/test_timeouts.h" |
| 18 #include "chrome/common/chrome_paths.h" |
| 19 #include "testing/gtest/include/gtest/gtest.h" |
| 20 #include "testing/multiprocess_func_list.h" |
| 21 |
| 22 namespace chrome { |
| 23 |
| 24 class ComponentFlashHintFileTest : public base::MultiProcessTest {}; |
| 25 |
| 26 TEST_F(ComponentFlashHintFileTest, ExistsTest) { |
| 27 const base::ScopedPathOverride path_override(chrome::DIR_USER_DATA); |
| 28 EXPECT_FALSE(component_flash_hint_file::DoesHintFileExist()); |
| 29 } |
| 30 |
| 31 TEST_F(ComponentFlashHintFileTest, InstallTest) { |
| 32 const base::ScopedPathOverride path_override(chrome::DIR_USER_DATA); |
| 33 EXPECT_FALSE(component_flash_hint_file::DoesHintFileExist()); |
| 34 |
| 35 base::FilePath flash_dir; |
| 36 ASSERT_TRUE(PathService::Get( |
| 37 chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, &flash_dir)); |
| 38 |
| 39 base::File::Error error; |
| 40 ASSERT_TRUE(base::CreateDirectoryAndGetError(flash_dir, &error)); |
| 41 |
| 42 // Write out a fixed byte array as the flash file. |
| 43 uint8_t file[] = {0x4c, 0x65, 0x74, 0x20, 0x75, 0x73, |
| 44 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x67}; |
| 45 flash_dir = flash_dir.Append("libflash.so"); |
| 46 const std::string flash_version = "1.0.0.1"; |
| 47 ASSERT_EQ(static_cast<int>(sizeof(file)), |
| 48 base::WriteFile(flash_dir, reinterpret_cast<const char*>(file), |
| 49 sizeof(file))); |
| 50 ASSERT_TRUE(component_flash_hint_file::RecordFlashUpdate(flash_dir, flash_dir, |
| 51 flash_version)); |
| 52 ASSERT_TRUE(component_flash_hint_file::DoesHintFileExist()); |
| 53 |
| 54 // Confirm that the flash plugin can be verified and returned. |
| 55 base::FilePath returned_flash_path; |
| 56 std::string version; |
| 57 ASSERT_TRUE(component_flash_hint_file::VerifyAndReturnFlashLocation( |
| 58 &returned_flash_path, &version)); |
| 59 ASSERT_EQ(returned_flash_path, flash_dir); |
| 60 ASSERT_EQ(version, flash_version); |
| 61 |
| 62 // Now "corrupt" the flash file and make sure the checksum fails and nothing |
| 63 // is returned. |
| 64 file[0] = 0xAA; |
| 65 ASSERT_TRUE(base::WriteFile(flash_dir, reinterpret_cast<const char*>(file), |
| 66 sizeof(file)) == sizeof(file)); |
| 67 base::FilePath empty_path; |
| 68 std::string empty_version; |
| 69 ASSERT_FALSE(component_flash_hint_file::VerifyAndReturnFlashLocation( |
| 70 &empty_path, &empty_version)); |
| 71 ASSERT_NE(empty_path, flash_dir); |
| 72 ASSERT_FALSE(empty_version == flash_version); |
| 73 } |
| 74 |
| 75 TEST_F(ComponentFlashHintFileTest, CorruptionTest) { |
| 76 const base::ScopedPathOverride path_override(chrome::DIR_USER_DATA); |
| 77 EXPECT_FALSE(component_flash_hint_file::DoesHintFileExist()); |
| 78 |
| 79 base::FilePath flash_dir; |
| 80 ASSERT_TRUE(PathService::Get( |
| 81 chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, &flash_dir)); |
| 82 |
| 83 base::File::Error error; |
| 84 ASSERT_TRUE(base::CreateDirectoryAndGetError(flash_dir, &error)); |
| 85 flash_dir = flash_dir.Append("libflash.so"); |
| 86 |
| 87 const uint8_t file[] = {0x56, 0x61, 0x20, 0x67, 0x75, 0x76, |
| 88 0x66, 0x20, 0x62, 0x61, 0x72, 0x20}; |
| 89 ASSERT_TRUE(base::WriteFile(flash_dir, reinterpret_cast<const char*>(file), |
| 90 sizeof(file)) == sizeof(file)); |
| 91 const std::string flash_version = "1.0.0.1"; |
| 92 ASSERT_TRUE(component_flash_hint_file::RecordFlashUpdate(flash_dir, flash_dir, |
| 93 flash_version)); |
| 94 ASSERT_TRUE(component_flash_hint_file::DoesHintFileExist()); |
| 95 |
| 96 // Now write out a new flash version that will not be moved into place. |
| 97 const uint8_t updated_file[] = {0x43, 0x72, 0x62, 0x63, 0x79, 0x72, |
| 98 0x20, 0x66, 0x7a, 0x76, 0x79, 0x76}; |
| 99 base::FilePath flash_dir_update; |
| 100 ASSERT_TRUE(PathService::Get( |
| 101 chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, &flash_dir_update)); |
| 102 flash_dir_update = flash_dir_update.Append("other_flash.so"); |
| 103 ASSERT_TRUE(base::WriteFile(flash_dir_update, |
| 104 reinterpret_cast<const char*>(updated_file), |
| 105 sizeof(updated_file)) == sizeof(updated_file)); |
| 106 ASSERT_TRUE(component_flash_hint_file::RecordFlashUpdate( |
| 107 flash_dir_update, flash_dir, flash_version)); |
| 108 // |flash_dir_update| needs to be moved to |flash_dir|, but this test |
| 109 // deliberately skips that step, so VerifyAndReturnFlashLocation should fail. |
| 110 base::FilePath failed_flash_dir; |
| 111 std::string failed_version; |
| 112 ASSERT_FALSE(component_flash_hint_file::VerifyAndReturnFlashLocation( |
| 113 &failed_flash_dir, &failed_version)); |
| 114 } |
| 115 |
| 116 TEST_F(ComponentFlashHintFileTest, ExecTest1) { |
| 117 base::ScopedTempDir temp_dir; |
| 118 ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); |
| 119 base::FilePath file_path = temp_dir.path().Append("plugin.so"); |
| 120 const uint8_t file[] = {0x55, 0x62, 0x79, 0x71, 0x20, |
| 121 0x6c, 0x62, 0x68, 0x65, 0x20}; |
| 122 |
| 123 ASSERT_TRUE(base::WriteFile(file_path, reinterpret_cast<const char*>(file), |
| 124 sizeof(file)) == sizeof(file)); |
| 125 ASSERT_TRUE(component_flash_hint_file::TestExecutableMapping(file_path)); |
| 126 } |
| 127 |
| 128 MULTIPROCESS_TEST_MAIN(NoExecMountTest) { |
| 129 if (unshare(CLONE_NEWUSER | CLONE_NEWNS) != 0) { |
| 130 LOG(ERROR) << "This kernel does not support unprivileged namespaces. " |
| 131 "ExecTest2 will succeed without running."; |
| 132 return 0; |
| 133 } |
| 134 // Now mount a NOEXEC fs. |
| 135 const unsigned long tmpfs_flags = MS_NODEV | MS_NOSUID | MS_NOEXEC; |
| 136 base::ScopedTempDir temp_dir; |
| 137 CHECK(temp_dir.CreateUniqueTempDir()); |
| 138 CHECK_EQ(0, mount("tmpfs", temp_dir.path().value().c_str(), "tmpfs", |
| 139 tmpfs_flags, nullptr)); |
| 140 const base::FilePath file_path = temp_dir.path().Append("plugin.so"); |
| 141 const uint8_t file[] = {0x56, 0x61, 0x20, 0x67, 0x75, 0x72, |
| 142 0x20, 0x70, 0x76, 0x67, 0x6c, 0x20}; |
| 143 bool test_exec = false; |
| 144 bool file_written = |
| 145 base::WriteFile(file_path, reinterpret_cast<const char*>(file), |
| 146 sizeof(file)) == static_cast<int>(sizeof(file)); |
| 147 if (file_written) |
| 148 test_exec = component_flash_hint_file::TestExecutableMapping(file_path); |
| 149 |
| 150 if (umount(temp_dir.path().value().c_str()) != 0) |
| 151 LOG(ERROR) << "Could not unmount directory " << temp_dir.path().value(); |
| 152 |
| 153 CHECK(file_written); |
| 154 CHECK(!test_exec); |
| 155 return 0; |
| 156 } |
| 157 |
| 158 TEST_F(ComponentFlashHintFileTest, ExecTest2) { |
| 159 base::Process process = SpawnChild("NoExecMountTest"); |
| 160 ASSERT_TRUE(process.IsValid()); |
| 161 int exit_code = 42; |
| 162 ASSERT_TRUE(process.WaitForExitWithTimeout(TestTimeouts::action_max_timeout(), |
| 163 &exit_code)); |
| 164 EXPECT_EQ(0, exit_code); |
| 165 } |
| 166 |
| 167 } // namespace chrome |
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