| // 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 "chrome/browser/extensions/sandboxed_unpacker.h" |
| |
| #include <set> |
| |
| #include "base/base64.h" |
| #include "base/bind.h" |
| #include "base/command_line.h" |
| #include "base/file_util.h" |
| #include "base/files/file_util_proxy.h" |
| #include "base/json/json_string_value_serializer.h" |
| #include "base/memory/scoped_handle.h" |
| #include "base/message_loop/message_loop.h" |
| #include "base/metrics/histogram.h" |
| #include "base/path_service.h" |
| #include "base/safe_numerics.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/threading/sequenced_worker_pool.h" |
| #include "chrome/browser/extensions/extension_service.h" |
| #include "chrome/common/chrome_paths.h" |
| #include "chrome/common/chrome_switches.h" |
| #include "chrome/common/chrome_utility_messages.h" |
| #include "chrome/common/extensions/extension.h" |
| #include "chrome/common/extensions/extension_file_util.h" |
| #include "chrome/common/extensions/extension_l10n_util.h" |
| #include "chrome/common/extensions/manifest_handlers/icons_handler.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "content/public/browser/utility_process_host.h" |
| #include "content/public/common/common_param_traits.h" |
| #include "crypto/signature_verifier.h" |
| #include "extensions/common/constants.h" |
| #include "extensions/common/crx_file.h" |
| #include "extensions/common/id_util.h" |
| #include "extensions/common/manifest_constants.h" |
| #include "grit/generated_resources.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "ui/base/l10n/l10n_util.h" |
| #include "ui/gfx/codec/png_codec.h" |
| |
| using content::BrowserThread; |
| using content::UtilityProcessHost; |
| |
| // 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(), 0, 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 kBytesPerKb = 1024; |
| const int64 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 crx_file_size; |
| if (!file_util::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 (!file_util::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 (file_util::WriteFile(temp_file, ".", 1) != 1) |
| return false; |
| |
| base::FilePath normalized_temp_file; |
| bool normalized = |
| file_util::NormalizeFilePath(temp_file, &normalized_temp_file); |
| if (!normalized) { |
| // If |temp_file| contains a link, the sandbox will block al 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 = extension_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()); |
| 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()); |
| PickleIterator iter(pickle); |
| return IPC::ReadParam(&pickle, &iter, catalogs); |
| } |
| |
| } // namespace |
| |
| SandboxedUnpacker::SandboxedUnpacker( |
| const base::FilePath& crx_path, |
| Manifest::Location location, |
| int creation_flags, |
| const base::FilePath& extensions_dir, |
| base::SequencedTaskRunner* unpacker_io_task_runner, |
| SandboxedUnpackerClient* client) |
| : crx_path_(crx_path), |
| client_(client), |
| extensions_dir_(extensions_dir), |
| got_response_(false), |
| location_(location), |
| creation_flags_(creation_flags), |
| unpacker_io_task_runner_(unpacker_io_task_runner) { |
| } |
| |
| bool SandboxedUnpacker::CreateTempDirectory() { |
| CHECK(unpacker_io_task_runner_->RunsTasksOnCurrentThread()); |
| |
| 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::Start() { |
| // We assume that we are started on the thread that the client wants us to do |
| // file IO on. |
| CHECK(unpacker_io_task_runner_->RunsTasksOnCurrentThread()); |
| |
| unpack_start_time_ = base::TimeTicks::Now(); |
| |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackInitialCrxPathLength", |
| crx_path_); |
| if (!CreateTempDirectory()) |
| return; // ReportFailure() already called. |
| |
| // Initialize the path that will eventually contain the unpacked extension. |
| extension_root_ = temp_dir_.path().AppendASCII(kTempExtensionName); |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackUnpackedCrxPathLength", |
| extension_root_); |
| |
| // Extract the public key and validate the package. |
| if (!ValidateSignature()) |
| return; // ValidateSignature() already reported the error. |
| |
| // Copy the crx file into our working directory. |
| base::FilePath temp_crx_path = temp_dir_.path().Append(crx_path_.BaseName()); |
| PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackTempCrxPathLength", |
| temp_crx_path); |
| |
| if (!base::CopyFile(crx_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 (!file_util::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::StartProcessOnIOThread, |
| this, |
| link_free_crx_path)); |
| } |
| |
| SandboxedUnpacker::~SandboxedUnpacker() { |
| } |
| |
| bool SandboxedUnpacker::OnMessageReceived(const IPC::Message& message) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(SandboxedUnpacker, message) |
| IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_UnpackExtension_Succeeded, |
| OnUnpackExtensionSucceeded) |
| IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_UnpackExtension_Failed, |
| OnUnpackExtensionFailed) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| void SandboxedUnpacker::OnProcessCrashed(int exit_code) { |
| // Don't report crashes if they happen after we got a response. |
| if (got_response_) |
| return; |
| |
| // Utility process crashed while trying to install. |
| ReportFailure( |
| UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_INSTALL_ERROR, |
| ASCIIToUTF16("UTILITY_PROCESS_CRASHED_WHILE_TRYING_TO_INSTALL"))); |
| } |
| |
| void SandboxedUnpacker::StartProcessOnIOThread( |
| const base::FilePath& temp_crx_path) { |
| UtilityProcessHost* host = |
| UtilityProcessHost::Create(this, unpacker_io_task_runner_.get()); |
| // Grant the subprocess access to the entire subdir the extension file is |
| // in, so that it can unpack to that dir. |
| host->SetExposedDir(temp_crx_path.DirName()); |
| host->Send( |
| new ChromeUtilityMsg_UnpackExtension( |
| temp_crx_path, extension_id_, location_, creation_flags_)); |
| } |
| |
| void SandboxedUnpacker::OnUnpackExtensionSucceeded( |
| const DictionaryValue& manifest) { |
| CHECK(unpacker_io_task_runner_->RunsTasksOnCurrentThread()); |
| got_response_ = true; |
| |
| scoped_ptr<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 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, |
| 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(manifest, install_icon); |
| } |
| |
| void SandboxedUnpacker::OnUnpackExtensionFailed(const string16& error) { |
| CHECK(unpacker_io_task_runner_->RunsTasksOnCurrentThread()); |
| got_response_ = true; |
| ReportFailure( |
| UNPACKER_CLIENT_FAILED, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_MESSAGE, |
| error)); |
| } |
| |
| bool SandboxedUnpacker::ValidateSignature() { |
| ScopedStdioHandle file(file_util::OpenFile(crx_path_, "rb")); |
| |
| if (!file.get()) { |
| // Could not open crx file for reading. |
| #if defined (OS_WIN) |
| // On windows, get the error code. |
| uint32 error_code = ::GetLastError(); |
| // TODO(skerner): Use this histogram to understand why so many |
| // windows users hit this error. crbug.com/69693 |
| |
| // Windows errors are unit32s, but all of likely errors are in |
| // [1, 1000]. See winerror.h for the meaning of specific values. |
| // Clip errors outside the expected range to a single extra value. |
| // If there are errors in that extra bucket, we will know to expand |
| // the range. |
| const uint32 kMaxErrorToSend = 1001; |
| error_code = std::min(error_code, kMaxErrorToSend); |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ErrorCodeFromCrxOpen", |
| error_code, kMaxErrorToSend); |
| #endif |
| |
| ReportFailure( |
| CRX_FILE_NOT_READABLE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_FILE_NOT_READABLE"))); |
| return false; |
| } |
| |
| // Read and verify the header. |
| // TODO(erikkay): Yuck. I'm not a big fan of this kind of code, but it |
| // appears that we don't have any endian/alignment aware serialization |
| // code in the code base. So for now, this assumes that we're running |
| // on a little endian machine with 4 byte alignment. |
| CrxFile::Header header; |
| size_t len = fread(&header, 1, sizeof(header), file.get()); |
| if (len < sizeof(header)) { |
| // Invalid crx header |
| ReportFailure( |
| CRX_HEADER_INVALID, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_HEADER_INVALID"))); |
| return false; |
| } |
| |
| CrxFile::Error error; |
| scoped_ptr<CrxFile> crx(CrxFile::Parse(header, &error)); |
| if (!crx) { |
| switch (error) { |
| case CrxFile::kWrongMagic: |
| ReportFailure( |
| CRX_MAGIC_NUMBER_INVALID, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_MAGIC_NUMBER_INVALID"))); |
| break; |
| case CrxFile::kInvalidVersion: |
| // Bad version numer |
| ReportFailure( |
| CRX_VERSION_NUMBER_INVALID, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_VERSION_NUMBER_INVALID"))); |
| break; |
| case CrxFile::kInvalidKeyTooLarge: |
| case CrxFile::kInvalidSignatureTooLarge: |
| // Excessively large key or signature |
| ReportFailure( |
| CRX_EXCESSIVELY_LARGE_KEY_OR_SIGNATURE, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_EXCESSIVELY_LARGE_KEY_OR_SIGNATURE"))); |
| break; |
| case CrxFile::kInvalidKeyTooSmall: |
| // Key length is zero |
| ReportFailure( |
| CRX_ZERO_KEY_LENGTH, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_ZERO_KEY_LENGTH"))); |
| break; |
| case CrxFile::kInvalidSignatureTooSmall: |
| // Signature length is zero |
| ReportFailure( |
| CRX_ZERO_SIGNATURE_LENGTH, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_ZERO_SIGNATURE_LENGTH"))); |
| break; |
| } |
| return false; |
| } |
| |
| std::vector<uint8> key; |
| key.resize(header.key_size); |
| len = fread(&key.front(), sizeof(uint8), header.key_size, file.get()); |
| if (len < header.key_size) { |
| // Invalid public key |
| ReportFailure( |
| CRX_PUBLIC_KEY_INVALID, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_PUBLIC_KEY_INVALID"))); |
| return false; |
| } |
| |
| std::vector<uint8> signature; |
| signature.resize(header.signature_size); |
| len = fread(&signature.front(), sizeof(uint8), header.signature_size, |
| file.get()); |
| if (len < header.signature_size) { |
| // Invalid signature |
| ReportFailure( |
| CRX_SIGNATURE_INVALID, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_SIGNATURE_INVALID"))); |
| return false; |
| } |
| |
| crypto::SignatureVerifier verifier; |
| if (!verifier.VerifyInit(extension_misc::kSignatureAlgorithm, |
| sizeof(extension_misc::kSignatureAlgorithm), |
| &signature.front(), |
| signature.size(), |
| &key.front(), |
| key.size())) { |
| // Signature verification initialization failed. This is most likely |
| // caused by a public key in the wrong format (should encode algorithm). |
| ReportFailure( |
| CRX_SIGNATURE_VERIFICATION_INITIALIZATION_FAILED, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_SIGNATURE_VERIFICATION_INITIALIZATION_FAILED"))); |
| return false; |
| } |
| |
| unsigned char buf[1 << 12]; |
| while ((len = fread(buf, 1, sizeof(buf), file.get())) > 0) |
| verifier.VerifyUpdate(buf, len); |
| |
| if (!verifier.VerifyFinal()) { |
| // Signature verification failed |
| ReportFailure( |
| CRX_SIGNATURE_VERIFICATION_FAILED, |
| l10n_util::GetStringFUTF16( |
| IDS_EXTENSION_PACKAGE_ERROR_CODE, |
| ASCIIToUTF16("CRX_SIGNATURE_VERIFICATION_FAILED"))); |
| return false; |
| } |
| |
| std::string public_key = |
| std::string(reinterpret_cast<char*>(&key.front()), key.size()); |
| base::Base64Encode(public_key, &public_key_); |
| |
| extension_id_ = id_util::GenerateId(public_key); |
| |
| return true; |
| } |
| |
| void SandboxedUnpacker::ReportFailure(FailureReason reason, |
| const string16& error) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.SandboxUnpackFailureReason", |
| reason, NUM_FAILURE_REASONS); |
| UMA_HISTOGRAM_TIMES("Extensions.SandboxUnpackFailureTime", |
| base::TimeTicks::Now() - unpack_start_time_); |
| Cleanup(); |
| client_->OnUnpackFailure(error); |
| } |
| |
| void SandboxedUnpacker::ReportSuccess( |
| const DictionaryValue& original_manifest, |
| const SkBitmap& install_icon) { |
| UMA_HISTOGRAM_COUNTS("Extensions.SandboxUnpackSuccess", 1); |
| |
| RecordSuccessfulUnpackTimeHistograms( |
| crx_path_, base::TimeTicks::Now() - unpack_start_time_); |
| |
| // Client takes ownership of temporary directory and extension. |
| client_->OnUnpackSuccess( |
| temp_dir_.Take(), extension_root_, &original_manifest, extension_.get(), |
| install_icon); |
| extension_ = NULL; |
| } |
| |
| DictionaryValue* SandboxedUnpacker::RewriteManifestFile( |
| const 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. |
| scoped_ptr<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_numeric_cast<int>(manifest_json.size()); |
| if (file_util::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) { |
| DecodedImages images; |
| if (!ReadImagesFromFile(temp_dir_.path(), &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 = |
| extension_file_util::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; |
| } |
| } |
| |
| std::string install_icon_path = IconsInfo::GetIcons(extension_).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 = images[i].a; |
| base::FilePath path_suffix = images[i].b; |
| 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_numeric_cast<int>(image_data.size()); |
| if (file_util::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() { |
| DictionaryValue catalogs; |
| if (!ReadMessageCatalogsFromFile(temp_dir_.path(), &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 (DictionaryValue::Iterator it(catalogs); !it.IsAtEnd(); it.Advance()) { |
| const 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_numeric_cast<int>(catalog_json.size()); |
| if (file_util::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_->RunsTasksOnCurrentThread()); |
| if (!temp_dir_.Delete()) { |
| LOG(WARNING) << "Can not delete temp directory at " |
| << temp_dir_.path().value(); |
| } |
| } |
| |
| } // namespace extensions |
