| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "extensions/browser/sandboxed_unpacker.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <set> |
| #include <tuple> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/bind.h" |
| #include "base/command_line.h" |
| #include "base/files/file_util.h" |
| #include "base/json/json_string_value_serializer.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/path_service.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/threading/sequenced_worker_pool.h" |
| #include "build/build_config.h" |
| #include "components/crx_file/crx_verifier.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "extensions/common/constants.h" |
| #include "extensions/common/extension.h" |
| #include "extensions/common/extension_l10n_util.h" |
| #include "extensions/common/extension_unpacker.mojom.h" |
| #include "extensions/common/extension_utility_types.h" |
| #include "extensions/common/extensions_client.h" |
| #include "extensions/common/file_util.h" |
| #include "extensions/common/manifest_constants.h" |
| #include "extensions/common/manifest_handlers/icons_handler.h" |
| #include "extensions/common/switches.h" |
| #include "extensions/strings/grit/extensions_strings.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "ui/base/l10n/l10n_util.h" |
| #include "ui/gfx/codec/png_codec.h" |
| |
| using base::ASCIIToUTF16; |
| using content::BrowserThread; |
| |
| // The following macro makes histograms that record the length of paths |
| // in this file much easier to read. |
| // Windows has a short max path length. If the path length to a |
| // file being unpacked from a CRX exceeds the max length, we might |
| // fail to install. To see if this is happening, see how long the |
| // path to the temp unpack directory is. See crbug.com/69693 . |
| #define PATH_LENGTH_HISTOGRAM(name, path) \ |
| UMA_HISTOGRAM_CUSTOM_COUNTS(name, path.value().length(), 1, 500, 100) |
| |
| // Record a rate (kB per second) at which extensions are unpacked. |
| // Range from 1kB/s to 100mB/s. |
| #define UNPACK_RATE_HISTOGRAM(name, rate) \ |
| UMA_HISTOGRAM_CUSTOM_COUNTS(name, rate, 1, 100000, 100); |
| |
| namespace extensions { |
| namespace { |
| |
| void RecordSuccessfulUnpackTimeHistograms(const base::FilePath& crx_path, |
| const base::TimeDelta unpack_time) { |
| const int64_t kBytesPerKb = 1024; |
| const int64_t kBytesPerMb = 1024 * 1024; |
| |
| UMA_HISTOGRAM_TIMES("Extensions.SandboxUnpackSuccessTime", unpack_time); |
| |
| // To get a sense of how CRX size impacts unpack time, record unpack |
| // time for several increments of CRX size. |
| int64_t crx_file_size; |
| if (!base::GetFileSize(crx_path, &crx_file_size)) { |
| UMA_HISTOGRAM_COUNTS("Extensions.SandboxUnpackSuccessCantGetCrxSize", 1); |
| return; |
| } |
| |
| // Cast is safe as long as the number of bytes in the CRX is less than |
| // 2^31 * 2^10. |
| int crx_file_size_kb = static_cast<int>(crx_file_size / kBytesPerKb); |
| UMA_HISTOGRAM_COUNTS("Extensions.SandboxUnpackSuccessCrxSize", |
| crx_file_size_kb); |
| |
| // We have time in seconds and file size in bytes. We want the rate bytes are |
| // unpacked in kB/s. |
| double file_size_kb = |
| static_cast<double>(crx_file_size) / static_cast<double>(kBytesPerKb); |
| int unpack_rate_kb_per_s = |
| static_cast<int>(file_size_kb / unpack_time.InSecondsF()); |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRate", unpack_rate_kb_per_s); |
| |
| if (crx_file_size < 50.0 * kBytesPerKb) { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRateUnder50kB", |
| unpack_rate_kb_per_s); |
| |
| } else if (crx_file_size < 1 * kBytesPerMb) { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRate50kBTo1mB", |
| unpack_rate_kb_per_s); |
| |
| } else if (crx_file_size < 2 * kBytesPerMb) { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRate1To2mB", |
| unpack_rate_kb_per_s); |
| |
| } else if (crx_file_size < 5 * kBytesPerMb) { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRate2To5mB", |
| unpack_rate_kb_per_s); |
| |
| } else if (crx_file_size < 10 * kBytesPerMb) { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRate5To10mB", |
| unpack_rate_kb_per_s); |
| |
| } else { |
| UNPACK_RATE_HISTOGRAM("Extensions.SandboxUnpackRateOver10mB", |
| unpack_rate_kb_per_s); |
| } |
| } |
| |
| // Work horse for FindWritableTempLocation. Creates a temp file in the folder |
| // and uses NormalizeFilePath to check if the path is junction free. |
| bool VerifyJunctionFreeLocation(base::FilePath* temp_dir) { |
| if (temp_dir->empty()) |
| return false; |
| |
| base::FilePath temp_file; |
| if (!base::CreateTemporaryFileInDir(*temp_dir, &temp_file)) { |
| LOG(ERROR) << temp_dir->value() << " is not writable"; |
| return false; |
| } |
| |
| // NormalizeFilePath requires a non-empty file, so write some data. |
| // If you change the exit points of this function please make sure all |
| // exit points delete this temp file! |
| if (base::WriteFile(temp_file, ".", 1) != 1) { |
| base::DeleteFile(temp_file, false); |
| return false; |
| } |
| |
| base::FilePath normalized_temp_file; |
| bool normalized = base::NormalizeFilePath(temp_file, &normalized_temp_file); |
| if (!normalized) { |
| // If |temp_file| contains a link, the sandbox will block all file |
| // system operations, and the install will fail. |
| LOG(ERROR) << temp_dir->value() << " seem to be on remote drive."; |
| } else { |
| *temp_dir = normalized_temp_file.DirName(); |
| } |
| |
| // Clean up the temp file. |
| base::DeleteFile(temp_file, false); |
| |
| return normalized; |
| } |
| |
| // This function tries to find a location for unpacking the extension archive |
| // that is writable and does not lie on a shared drive so that the sandboxed |
| // unpacking process can write there. If no such location exists we can not |
| // proceed and should fail. |
| // The result will be written to |temp_dir|. The function will write to this |
| // parameter even if it returns false. |
| bool FindWritableTempLocation(const base::FilePath& extensions_dir, |
| base::FilePath* temp_dir) { |
| // On ChromeOS, we will only attempt to unpack extension in cryptohome (profile) |
| // directory to provide additional security/privacy and speed up the rest of |
| // the extension install process. |
| #if !defined(OS_CHROMEOS) |
| PathService::Get(base::DIR_TEMP, temp_dir); |
| if (VerifyJunctionFreeLocation(temp_dir)) |
| return true; |
| #endif |
| |
| *temp_dir = file_util::GetInstallTempDir(extensions_dir); |
| if (VerifyJunctionFreeLocation(temp_dir)) |
| return true; |
| // Neither paths is link free chances are good installation will fail. |
| LOG(ERROR) << "Both the %TEMP% folder and the profile seem to be on " |
| << "remote drives or read-only. Installation can not complete!"; |
| return false; |
| } |
| |
| // Read the decoded images back from the file we saved them to. |
| // |extension_path| is the path to the extension we unpacked that wrote the |
| // data. Returns true on success. |
| bool ReadImagesFromFile(const base::FilePath& extension_path, |
| DecodedImages* images) { |
| base::FilePath path = extension_path.AppendASCII(kDecodedImagesFilename); |
| std::string file_str; |
| if (!base::ReadFileToString(path, &file_str)) |
| return false; |
| |
| IPC::Message pickle(file_str.data(), file_str.size()); |
| base::PickleIterator iter(pickle); |
| return IPC::ReadParam(&pickle, &iter, images); |
| } |
| |
| // Read the decoded message catalogs back from the file we saved them to. |
| // |extension_path| is the path to the extension we unpacked that wrote the |
| // data. Returns true on success. |
| bool ReadMessageCatalogsFromFile(const base::FilePath& extension_path, |
| base::DictionaryValue* catalogs) { |
| base::FilePath path = |
| extension_path.AppendASCII(kDecodedMessageCatalogsFilename); |
| std::string file_str; |
| if (!base::ReadFileToString(path, &file_str)) |
| return false; |
| |
| IPC::Message pickle(file_str.data(), file_str.size()); |
| base::PickleIterator iter(pickle); |
| return IPC::ReadParam(&pickle, &iter, catalogs); |
| } |
| |
| } // namespace |
| |
| SandboxedUnpackerClient::SandboxedUnpackerClient() |
| : RefCountedDeleteOnSequence<SandboxedUnpackerClient>( |
| content::BrowserThread::GetTaskRunnerForThread( |
| content::BrowserThread::UI)) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| } |
| |
| SandboxedUnpacker::SandboxedUnpacker( |
| Manifest::Location location, |
| int creation_flags, |
| const base::FilePath& extensions_dir, |
| const scoped_refptr<base::SequencedTaskRunner>& unpacker_io_task_runner, |
| SandboxedUnpackerClient* client) |
| : client_(client), |
| extensions_dir_(extensions_dir), |
| location_(location), |
| creation_flags_(creation_flags), |
| unpacker_io_task_runner_(unpacker_io_task_runner) { |
| // Tracking for crbug.com/692069. The location must be valid. If it's invalid, |
| // the utility process kills itself for a bad IPC. |
| CHECK_GT(location, Manifest::INVALID_LOCATION); |
| CHECK_LT(location, Manifest::NUM_LOCATIONS); |
| } |
| |
| bool SandboxedUnpacker::CreateTempDirectory() { |
| CHECK(unpacker_io_task_runner_->RunsTasksInCurrentSequence()); |
| |
| base::FilePath temp_dir; |
| if (!FindWritableTempLocation(extensions_dir_, &temp_dir)) { |
| ReportFailure(COULD_NOT_GET_TEMP_DIRECTORY, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("COULD_NOT_GET_TEMP_DIRECTORY"))); |
| return false; |
| } |
| |
| if (!temp_dir_.CreateUniqueTempDirUnderPath(temp_dir)) { |
| ReportFailure(COULD_NOT_CREATE_TEMP_DIRECTORY, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("COULD_NOT_CREATE_TEMP_DIRECTORY"))); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void SandboxedUnpacker::StartWithCrx(const CRXFileInfo& crx_info) { |
| // We assume that we are started on the thread that the client wants us |
| // to do file IO on. |
| CHECK(unpacker_io_task_runner_->RunsTasksInCurrentSequence()); |
| |
| crx_unpack_start_time_ = base::TimeTicks::Now(); |
| std::string expected_hash; |
| if (!crx_info.expected_hash.empty() && |
| base::CommandLine::ForCurrentProcess()->HasSwitch( |
| extensions::switches::kEnableCrxHashCheck)) { |
| expected_hash = base::ToLowerASCII(crx_info.expected_hash); |
| } |
| |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackInitialCrxPathLength", |
| crx_info.path); |
| if (!CreateTempDirectory()) |
| return; // ReportFailure() already called. |
| |
| // Initialize the path that will eventually contain the unpacked extension. |
| extension_root_ = temp_dir_.GetPath().AppendASCII(kTempExtensionName); |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackUnpackedCrxPathLength", |
| extension_root_); |
| |
| // Extract the public key and validate the package. |
| if (!ValidateSignature(crx_info.path, expected_hash)) |
| return; // ValidateSignature() already reported the error. |
| |
| // Copy the crx file into our working directory. |
| base::FilePath temp_crx_path = |
| temp_dir_.GetPath().Append(crx_info.path.BaseName()); |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackTempCrxPathLength", |
| temp_crx_path); |
| |
| if (!base::CopyFile(crx_info.path, temp_crx_path)) { |
| // Failed to copy extension file to temporary directory. |
| ReportFailure( |
| FAILED_TO_COPY_EXTENSION_FILE_TO_TEMP_DIRECTORY, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("FAILED_TO_COPY_EXTENSION_FILE_TO_TEMP_DIRECTORY"))); |
| return; |
| } |
| |
| // The utility process will have access to the directory passed to |
| // SandboxedUnpacker. That directory should not contain a symlink or NTFS |
| // reparse point. When the path is used, following the link/reparse point |
| // will cause file system access outside the sandbox path, and the sandbox |
| // will deny the operation. |
| base::FilePath link_free_crx_path; |
| if (!base::NormalizeFilePath(temp_crx_path, &link_free_crx_path)) { |
| LOG(ERROR) << "Could not get the normalized path of " |
| << temp_crx_path.value(); |
| ReportFailure(COULD_NOT_GET_SANDBOX_FRIENDLY_PATH, |
| l10n_util::GetStringUTF16(IDS_EXTENSION_UNPACK_FAILED)); |
| return; |
| } |
| |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackLinkFreeCrxPathLength", |
| link_free_crx_path); |
| |
| BrowserThread::PostTask( |
| BrowserThread::IO, FROM_HERE, |
| base::Bind(&SandboxedUnpacker::Unzip, this, link_free_crx_path)); |
| } |
| |
| void SandboxedUnpacker::StartWithDirectory(const std::string& extension_id, |
| const std::string& public_key, |
| const base::FilePath& directory) { |
| extension_id_ = extension_id; |
| public_key_ = public_key; |
| if (!CreateTempDirectory()) |
| return; // ReportFailure() already called. |
| |
| extension_root_ = temp_dir_.GetPath().AppendASCII(kTempExtensionName); |
| |
| if (!base::Move(directory, extension_root_)) { |
| LOG(ERROR) << "Could not move " << directory.value() << " to " |
| << extension_root_.value(); |
| ReportFailure( |
| DIRECTORY_MOVE_FAILED, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("DIRECTORY_MOVE_FAILED"))); |
| return; |
| } |
| |
| BrowserThread::PostTask( |
| BrowserThread::IO, FROM_HERE, |
| base::Bind(&SandboxedUnpacker::Unpack, this, extension_root_)); |
| } |
| |
| SandboxedUnpacker::~SandboxedUnpacker() { |
| // To avoid blocking shutdown, don't delete temporary directory here if it |
| // hasn't been cleaned up or passed on to another owner yet. |
| temp_dir_.Take(); |
| } |
| |
| void SandboxedUnpacker::StartUtilityProcessIfNeeded() { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::IO); |
| |
| if (utility_process_mojo_client_) |
| return; |
| |
| utility_process_mojo_client_ = base::MakeUnique< |
| content::UtilityProcessMojoClient<mojom::ExtensionUnpacker>>( |
| l10n_util::GetStringUTF16(IDS_UTILITY_PROCESS_EXTENSION_UNPACKER_NAME)); |
| utility_process_mojo_client_->set_error_callback( |
| base::Bind(&SandboxedUnpacker::UtilityProcessCrashed, this)); |
| |
| utility_process_mojo_client_->set_exposed_directory(temp_dir_.GetPath()); |
| |
| utility_process_mojo_client_->Start(); |
| } |
| |
| void SandboxedUnpacker::UtilityProcessCrashed() { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::IO); |
| |
| utility_process_mojo_client_.reset(); |
| |
| ReportFailure( |
| UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL")) + |
| ASCIIToUTF16(". ") + |
| l10n_util::GetStringUTF16(IDS_EXTENSION_INSTALL_PROCESS_CRASHED)); |
| } |
| |
| void SandboxedUnpacker::Unzip(const base::FilePath& crx_path) { |
| DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| |
| StartUtilityProcessIfNeeded(); |
| |
| DCHECK(crx_path.DirName() == temp_dir_.GetPath()); |
| base::FilePath unzipped_dir = |
| crx_path.DirName().AppendASCII(kTempExtensionName); |
| |
| utility_process_mojo_client_->service()->Unzip( |
| crx_path, unzipped_dir, |
| base::Bind(&SandboxedUnpacker::UnzipDone, this, unzipped_dir)); |
| } |
| |
| void SandboxedUnpacker::UnzipDone(const base::FilePath& directory, |
| bool success) { |
| DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| |
| if (!success) { |
| utility_process_mojo_client_.reset(); |
| ReportFailure(UNZIP_FAILED, |
| l10n_util::GetStringUTF16(IDS_EXTENSION_PACKAGE_UNZIP_ERROR)); |
| return; |
| } |
| |
| BrowserThread::PostTask( |
| BrowserThread::IO, FROM_HERE, |
| base::Bind(&SandboxedUnpacker::Unpack, this, directory)); |
| } |
| |
| void SandboxedUnpacker::Unpack(const base::FilePath& directory) { |
| DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| |
| StartUtilityProcessIfNeeded(); |
| |
| DCHECK(directory.DirName() == temp_dir_.GetPath()); |
| |
| utility_process_mojo_client_->service()->Unpack( |
| directory, extension_id_, location_, creation_flags_, |
| base::Bind(&SandboxedUnpacker::UnpackDone, this)); |
| } |
| |
| void SandboxedUnpacker::UnpackDone( |
| const base::string16& error, |
| std::unique_ptr<base::DictionaryValue> manifest) { |
| DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| |
| utility_process_mojo_client_.reset(); |
| |
| if (!error.empty()) { |
| unpacker_io_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&SandboxedUnpacker::UnpackExtensionFailed, this, error)); |
| return; |
| } |
| |
| unpacker_io_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&SandboxedUnpacker::UnpackExtensionSucceeded, this, |
| base::Passed(&manifest))); |
| } |
| |
| void SandboxedUnpacker::UnpackExtensionSucceeded( |
| std::unique_ptr<base::DictionaryValue> manifest) { |
| CHECK(unpacker_io_task_runner_->RunsTasksInCurrentSequence()); |
| |
| std::unique_ptr<base::DictionaryValue> final_manifest( |
| RewriteManifestFile(*manifest)); |
| if (!final_manifest) |
| return; |
| |
| // Create an extension object that refers to the temporary location the |
| // extension was unpacked to. We use this until the extension is finally |
| // installed. For example, the install UI shows images from inside the |
| // extension. |
| |
| // Localize manifest now, so confirm UI gets correct extension name. |
| |
| // TODO(rdevlin.cronin): Continue removing std::string errors and replacing |
| // with base::string16 |
| std::string utf8_error; |
| if (!extension_l10n_util::LocalizeExtension( |
| extension_root_, final_manifest.get(), &utf8_error)) { |
| ReportFailure( |
| COULD_NOT_LOCALIZE_EXTENSION, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_ERROR_MESSAGE, |
| base::UTF8ToUTF16(utf8_error))); |
| return; |
| } |
| |
| extension_ = |
| Extension::Create(extension_root_, location_, *final_manifest, |
| Extension::REQUIRE_KEY | creation_flags_, &utf8_error); |
| |
| if (!extension_.get()) { |
| ReportFailure(INVALID_MANIFEST, |
| ASCIIToUTF16("Manifest is invalid: " + utf8_error)); |
| return; |
| } |
| |
| SkBitmap install_icon; |
| if (!RewriteImageFiles(&install_icon)) |
| return; |
| |
| if (!RewriteCatalogFiles()) |
| return; |
| |
| ReportSuccess(std::move(manifest), install_icon); |
| } |
| |
| void SandboxedUnpacker::UnpackExtensionFailed(const base::string16& error) { |
| CHECK(unpacker_io_task_runner_->RunsTasksInCurrentSequence()); |
| |
| ReportFailure( |
| UNPACKER_CLIENT_FAILED, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_ERROR_MESSAGE, error)); |
| } |
| |
| base::string16 SandboxedUnpacker::FailureReasonToString16( |
| FailureReason reason) { |
| switch (reason) { |
| case COULD_NOT_GET_TEMP_DIRECTORY: |
| return ASCIIToUTF16("COULD_NOT_GET_TEMP_DIRECTORY"); |
| case COULD_NOT_CREATE_TEMP_DIRECTORY: |
| return ASCIIToUTF16("COULD_NOT_CREATE_TEMP_DIRECTORY"); |
| case FAILED_TO_COPY_EXTENSION_FILE_TO_TEMP_DIRECTORY: |
| return ASCIIToUTF16("FAILED_TO_COPY_EXTENSION_FILE_TO_TEMP_DIRECTORY"); |
| case COULD_NOT_GET_SANDBOX_FRIENDLY_PATH: |
| return ASCIIToUTF16("COULD_NOT_GET_SANDBOX_FRIENDLY_PATH"); |
| case COULD_NOT_LOCALIZE_EXTENSION: |
| return ASCIIToUTF16("COULD_NOT_LOCALIZE_EXTENSION"); |
| case INVALID_MANIFEST: |
| return ASCIIToUTF16("INVALID_MANIFEST"); |
| case UNPACKER_CLIENT_FAILED: |
| return ASCIIToUTF16("UNPACKER_CLIENT_FAILED"); |
| case UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL: |
| return ASCIIToUTF16("UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL"); |
| |
| case CRX_FILE_NOT_READABLE: |
| return ASCIIToUTF16("CRX_FILE_NOT_READABLE"); |
| case CRX_HEADER_INVALID: |
| return ASCIIToUTF16("CRX_HEADER_INVALID"); |
| case CRX_MAGIC_NUMBER_INVALID: |
| return ASCIIToUTF16("CRX_MAGIC_NUMBER_INVALID"); |
| case CRX_VERSION_NUMBER_INVALID: |
| return ASCIIToUTF16("CRX_VERSION_NUMBER_INVALID"); |
| case CRX_EXCESSIVELY_LARGE_KEY_OR_SIGNATURE: |
| return ASCIIToUTF16("CRX_EXCESSIVELY_LARGE_KEY_OR_SIGNATURE"); |
| case CRX_ZERO_KEY_LENGTH: |
| return ASCIIToUTF16("CRX_ZERO_KEY_LENGTH"); |
| case CRX_ZERO_SIGNATURE_LENGTH: |
| return ASCIIToUTF16("CRX_ZERO_SIGNATURE_LENGTH"); |
| case CRX_PUBLIC_KEY_INVALID: |
| return ASCIIToUTF16("CRX_PUBLIC_KEY_INVALID"); |
| case CRX_SIGNATURE_INVALID: |
| return ASCIIToUTF16("CRX_SIGNATURE_INVALID"); |
| case CRX_SIGNATURE_VERIFICATION_INITIALIZATION_FAILED: |
| return ASCIIToUTF16("CRX_SIGNATURE_VERIFICATION_INITIALIZATION_FAILED"); |
| case CRX_SIGNATURE_VERIFICATION_FAILED: |
| return ASCIIToUTF16("CRX_SIGNATURE_VERIFICATION_FAILED"); |
| case CRX_FILE_IS_DELTA_UPDATE: |
| return ASCIIToUTF16("CRX_FILE_IS_DELTA_UPDATE"); |
| case CRX_EXPECTED_HASH_INVALID: |
| return ASCIIToUTF16("CRX_EXPECTED_HASH_INVALID"); |
| |
| case ERROR_SERIALIZING_MANIFEST_JSON: |
| return ASCIIToUTF16("ERROR_SERIALIZING_MANIFEST_JSON"); |
| case ERROR_SAVING_MANIFEST_JSON: |
| return ASCIIToUTF16("ERROR_SAVING_MANIFEST_JSON"); |
| |
| case COULD_NOT_READ_IMAGE_DATA_FROM_DISK: |
| return ASCIIToUTF16("COULD_NOT_READ_IMAGE_DATA_FROM_DISK"); |
| case DECODED_IMAGES_DO_NOT_MATCH_THE_MANIFEST: |
| return ASCIIToUTF16("DECODED_IMAGES_DO_NOT_MATCH_THE_MANIFEST"); |
| case INVALID_PATH_FOR_BROWSER_IMAGE: |
| return ASCIIToUTF16("INVALID_PATH_FOR_BROWSER_IMAGE"); |
| case ERROR_REMOVING_OLD_IMAGE_FILE: |
| return ASCIIToUTF16("ERROR_REMOVING_OLD_IMAGE_FILE"); |
| case INVALID_PATH_FOR_BITMAP_IMAGE: |
| return ASCIIToUTF16("INVALID_PATH_FOR_BITMAP_IMAGE"); |
| case ERROR_RE_ENCODING_THEME_IMAGE: |
| return ASCIIToUTF16("ERROR_RE_ENCODING_THEME_IMAGE"); |
| case ERROR_SAVING_THEME_IMAGE: |
| return ASCIIToUTF16("ERROR_SAVING_THEME_IMAGE"); |
| case ABORTED_DUE_TO_SHUTDOWN: |
| return ASCIIToUTF16("ABORTED_DUE_TO_SHUTDOWN"); |
| |
| case COULD_NOT_READ_CATALOG_DATA_FROM_DISK: |
| return ASCIIToUTF16("COULD_NOT_READ_CATALOG_DATA_FROM_DISK"); |
| case INVALID_CATALOG_DATA: |
| return ASCIIToUTF16("INVALID_CATALOG_DATA"); |
| case INVALID_PATH_FOR_CATALOG: |
| return ASCIIToUTF16("INVALID_PATH_FOR_CATALOG"); |
| case ERROR_SERIALIZING_CATALOG: |
| return ASCIIToUTF16("ERROR_SERIALIZING_CATALOG"); |
| case ERROR_SAVING_CATALOG: |
| return ASCIIToUTF16("ERROR_SAVING_CATALOG"); |
| |
| case CRX_HASH_VERIFICATION_FAILED: |
| return ASCIIToUTF16("CRX_HASH_VERIFICATION_FAILED"); |
| |
| case UNZIP_FAILED: |
| return ASCIIToUTF16("UNZIP_FAILED"); |
| case DIRECTORY_MOVE_FAILED: |
| return ASCIIToUTF16("DIRECTORY_MOVE_FAILED"); |
| |
| case NUM_FAILURE_REASONS: |
| NOTREACHED(); |
| return base::string16(); |
| } |
| |
| NOTREACHED(); |
| return base::string16(); |
| } |
| |
| void SandboxedUnpacker::FailWithPackageError(FailureReason reason) { |
| ReportFailure(reason, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| FailureReasonToString16(reason))); |
| } |
| |
| bool SandboxedUnpacker::ValidateSignature(const base::FilePath& crx_path, |
| const std::string& expected_hash) { |
| std::vector<uint8_t> hash; |
| if (!expected_hash.empty()) { |
| if (!base::HexStringToBytes(expected_hash, &hash)) { |
| FailWithPackageError(CRX_EXPECTED_HASH_INVALID); |
| return false; |
| } |
| } |
| const crx_file::VerifierResult result = crx_file::Verify( |
| crx_path, crx_file::VerifierFormat::CRX2_OR_CRX3, |
| std::vector<std::vector<uint8_t>>(), hash, &public_key_, &extension_id_); |
| |
| switch (result) { |
| case crx_file::VerifierResult::OK_FULL: { |
| if (!expected_hash.empty()) |
| UMA_HISTOGRAM_BOOLEAN("Extensions.SandboxUnpackHashCheck", true); |
| return true; |
| } |
| case crx_file::VerifierResult::OK_DELTA: |
| FailWithPackageError(CRX_FILE_IS_DELTA_UPDATE); |
| break; |
| case crx_file::VerifierResult::ERROR_FILE_NOT_READABLE: |
| FailWithPackageError(CRX_FILE_NOT_READABLE); |
| break; |
| case crx_file::VerifierResult::ERROR_HEADER_INVALID: |
| FailWithPackageError(CRX_HEADER_INVALID); |
| break; |
| case crx_file::VerifierResult::ERROR_SIGNATURE_INITIALIZATION_FAILED: |
| FailWithPackageError(CRX_SIGNATURE_VERIFICATION_INITIALIZATION_FAILED); |
| break; |
| case crx_file::VerifierResult::ERROR_SIGNATURE_VERIFICATION_FAILED: |
| FailWithPackageError(CRX_SIGNATURE_VERIFICATION_FAILED); |
| break; |
| case crx_file::VerifierResult::ERROR_EXPECTED_HASH_INVALID: |
| FailWithPackageError(CRX_EXPECTED_HASH_INVALID); |
| break; |
| case crx_file::VerifierResult::ERROR_REQUIRED_PROOF_MISSING: |
| // We should never get this result, as we do not call |
| // verifier.RequireKeyProof. |
| NOTREACHED(); |
| break; |
| case crx_file::VerifierResult::ERROR_FILE_HASH_FAILED: |
| // We should never get this result unless we had specifically asked for |
| // verification of the crx file's hash. |
| CHECK(!expected_hash.empty()); |
| UMA_HISTOGRAM_BOOLEAN("Extensions.SandboxUnpackHashCheck", false); |
| FailWithPackageError(CRX_HASH_VERIFICATION_FAILED); |
| break; |
| } |
| |
| return false; |
| } |
| |
| void SandboxedUnpacker::ReportFailure(FailureReason reason, |
| const base::string16& error) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.SandboxUnpackFailureReason", reason, |
| NUM_FAILURE_REASONS); |
| if (!crx_unpack_start_time_.is_null()) |
| UMA_HISTOGRAM_TIMES("Extensions.SandboxUnpackFailureTime", |
| base::TimeTicks::Now() - crx_unpack_start_time_); |
| Cleanup(); |
| |
| CrxInstallError error_info(reason == CRX_HASH_VERIFICATION_FAILED |
| ? CrxInstallError::ERROR_HASH_MISMATCH |
| : CrxInstallError::ERROR_OTHER, |
| error); |
| |
| client_->OnUnpackFailure(error_info); |
| } |
| |
| void SandboxedUnpacker::ReportSuccess( |
| std::unique_ptr<base::DictionaryValue> original_manifest, |
| const SkBitmap& install_icon) { |
| UMA_HISTOGRAM_COUNTS("Extensions.SandboxUnpackSuccess", 1); |
| |
| if (!crx_unpack_start_time_.is_null()) |
| RecordSuccessfulUnpackTimeHistograms( |
| crx_path_for_histograms_, |
| base::TimeTicks::Now() - crx_unpack_start_time_); |
| DCHECK(!temp_dir_.GetPath().empty()); |
| |
| // Client takes ownership of temporary directory, manifest, and extension. |
| client_->OnUnpackSuccess(temp_dir_.Take(), extension_root_, |
| std::move(original_manifest), extension_.get(), |
| install_icon); |
| extension_ = NULL; |
| } |
| |
| base::DictionaryValue* SandboxedUnpacker::RewriteManifestFile( |
| const base::DictionaryValue& manifest) { |
| // Add the public key extracted earlier to the parsed manifest and overwrite |
| // the original manifest. We do this to ensure the manifest doesn't contain an |
| // exploitable bug that could be used to compromise the browser. |
| DCHECK(!public_key_.empty()); |
| std::unique_ptr<base::DictionaryValue> final_manifest(manifest.DeepCopy()); |
| final_manifest->SetString(manifest_keys::kPublicKey, public_key_); |
| |
| std::string manifest_json; |
| JSONStringValueSerializer serializer(&manifest_json); |
| serializer.set_pretty_print(true); |
| if (!serializer.Serialize(*final_manifest)) { |
| // Error serializing manifest.json. |
| ReportFailure(ERROR_SERIALIZING_MANIFEST_JSON, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_SERIALIZING_MANIFEST_JSON"))); |
| return NULL; |
| } |
| |
| base::FilePath manifest_path = extension_root_.Append(kManifestFilename); |
| int size = base::checked_cast<int>(manifest_json.size()); |
| if (base::WriteFile(manifest_path, manifest_json.data(), size) != size) { |
| // Error saving manifest.json. |
| ReportFailure( |
| ERROR_SAVING_MANIFEST_JSON, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_SAVING_MANIFEST_JSON"))); |
| return NULL; |
| } |
| |
| return final_manifest.release(); |
| } |
| |
| bool SandboxedUnpacker::RewriteImageFiles(SkBitmap* install_icon) { |
| DCHECK(!temp_dir_.GetPath().empty()); |
| |
| DecodedImages images; |
| if (!ReadImagesFromFile(temp_dir_.GetPath(), &images)) { |
| // Couldn't read image data from disk. |
| ReportFailure(COULD_NOT_READ_IMAGE_DATA_FROM_DISK, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("COULD_NOT_READ_IMAGE_DATA_FROM_DISK"))); |
| return false; |
| } |
| |
| // Delete any images that may be used by the browser. We're going to write |
| // out our own versions of the parsed images, and we want to make sure the |
| // originals are gone for good. |
| std::set<base::FilePath> image_paths = |
| ExtensionsClient::Get()->GetBrowserImagePaths(extension_.get()); |
| if (image_paths.size() != images.size()) { |
| // Decoded images don't match what's in the manifest. |
| ReportFailure( |
| DECODED_IMAGES_DO_NOT_MATCH_THE_MANIFEST, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("DECODED_IMAGES_DO_NOT_MATCH_THE_MANIFEST"))); |
| return false; |
| } |
| |
| for (std::set<base::FilePath>::iterator it = image_paths.begin(); |
| it != image_paths.end(); ++it) { |
| base::FilePath path = *it; |
| if (path.IsAbsolute() || path.ReferencesParent()) { |
| // Invalid path for browser image. |
| ReportFailure(INVALID_PATH_FOR_BROWSER_IMAGE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("INVALID_PATH_FOR_BROWSER_IMAGE"))); |
| return false; |
| } |
| if (!base::DeleteFile(extension_root_.Append(path), false)) { |
| // Error removing old image file. |
| ReportFailure(ERROR_REMOVING_OLD_IMAGE_FILE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_REMOVING_OLD_IMAGE_FILE"))); |
| return false; |
| } |
| } |
| |
| const std::string& install_icon_path = |
| IconsInfo::GetIcons(extension_.get()) |
| .Get(extension_misc::EXTENSION_ICON_LARGE, |
| ExtensionIconSet::MATCH_BIGGER); |
| |
| // Write our parsed images back to disk as well. |
| for (size_t i = 0; i < images.size(); ++i) { |
| if (BrowserThread::GetBlockingPool()->IsShutdownInProgress()) { |
| // Abort package installation if shutdown was initiated, crbug.com/235525 |
| ReportFailure( |
| ABORTED_DUE_TO_SHUTDOWN, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ABORTED_DUE_TO_SHUTDOWN"))); |
| return false; |
| } |
| |
| const SkBitmap& image = std::get<0>(images[i]); |
| base::FilePath path_suffix = std::get<1>(images[i]); |
| if (path_suffix.MaybeAsASCII() == install_icon_path) |
| *install_icon = image; |
| |
| if (path_suffix.IsAbsolute() || path_suffix.ReferencesParent()) { |
| // Invalid path for bitmap image. |
| ReportFailure(INVALID_PATH_FOR_BITMAP_IMAGE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("INVALID_PATH_FOR_BITMAP_IMAGE"))); |
| return false; |
| } |
| |
| base::FilePath path = extension_root_.Append(path_suffix); |
| |
| std::vector<unsigned char> image_data; |
| // TODO(mpcomplete): It's lame that we're encoding all images as PNG, even |
| // though they may originally be .jpg, etc. Figure something out. |
| // http://code.google.com/p/chromium/issues/detail?id=12459 |
| if (!gfx::PNGCodec::EncodeBGRASkBitmap(image, false, &image_data)) { |
| // Error re-encoding theme image. |
| ReportFailure(ERROR_RE_ENCODING_THEME_IMAGE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_RE_ENCODING_THEME_IMAGE"))); |
| return false; |
| } |
| |
| // Note: we're overwriting existing files that the utility process wrote, |
| // so we can be sure the directory exists. |
| const char* image_data_ptr = reinterpret_cast<const char*>(&image_data[0]); |
| int size = base::checked_cast<int>(image_data.size()); |
| if (base::WriteFile(path, image_data_ptr, size) != size) { |
| // Error saving theme image. |
| ReportFailure( |
| ERROR_SAVING_THEME_IMAGE, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_SAVING_THEME_IMAGE"))); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool SandboxedUnpacker::RewriteCatalogFiles() { |
| base::DictionaryValue catalogs; |
| if (!ReadMessageCatalogsFromFile(temp_dir_.GetPath(), &catalogs)) { |
| // Could not read catalog data from disk. |
| ReportFailure(COULD_NOT_READ_CATALOG_DATA_FROM_DISK, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("COULD_NOT_READ_CATALOG_DATA_FROM_DISK"))); |
| return false; |
| } |
| |
| // Write our parsed catalogs back to disk. |
| for (base::DictionaryValue::Iterator it(catalogs); !it.IsAtEnd(); |
| it.Advance()) { |
| const base::DictionaryValue* catalog = NULL; |
| if (!it.value().GetAsDictionary(&catalog)) { |
| // Invalid catalog data. |
| ReportFailure( |
| INVALID_CATALOG_DATA, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("INVALID_CATALOG_DATA"))); |
| return false; |
| } |
| |
| base::FilePath relative_path = base::FilePath::FromUTF8Unsafe(it.key()); |
| relative_path = relative_path.Append(kMessagesFilename); |
| if (relative_path.IsAbsolute() || relative_path.ReferencesParent()) { |
| // Invalid path for catalog. |
| ReportFailure( |
| INVALID_PATH_FOR_CATALOG, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("INVALID_PATH_FOR_CATALOG"))); |
| return false; |
| } |
| |
| base::FilePath path = extension_root_.Append(relative_path); |
| |
| std::string catalog_json; |
| JSONStringValueSerializer serializer(&catalog_json); |
| serializer.set_pretty_print(true); |
| if (!serializer.Serialize(*catalog)) { |
| // Error serializing catalog. |
| ReportFailure(ERROR_SERIALIZING_CATALOG, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_SERIALIZING_CATALOG"))); |
| return false; |
| } |
| |
| // Note: we're overwriting existing files that the utility process read, |
| // so we can be sure the directory exists. |
| int size = base::checked_cast<int>(catalog_json.size()); |
| if (base::WriteFile(path, catalog_json.c_str(), size) != size) { |
| // Error saving catalog. |
| ReportFailure( |
| ERROR_SAVING_CATALOG, |
| l10n_util::GetStringFUTF16(IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("ERROR_SAVING_CATALOG"))); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| void SandboxedUnpacker::Cleanup() { |
| DCHECK(unpacker_io_task_runner_->RunsTasksInCurrentSequence()); |
| if (!temp_dir_.Delete()) { |
| LOG(WARNING) << "Can not delete temp directory at " |
| << temp_dir_.GetPath().value(); |
| } |
| } |
| |
| } // namespace extensions |
