// 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/files/scoped_file.h"
#include "base/json/json_string_value_serializer.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/histogram.h"
#include "base/numerics/safe_conversions.h"
#include "base/path_service.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_file_util.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/extension.h"
#include "extensions/common/extension_l10n_util.h"
#include "extensions/common/file_util.h"
#include "extensions/common/id_util.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/icons_handler.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 base::ASCIIToUTF16;
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 (!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)
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 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 = 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 (!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::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")) +
ASCIIToUTF16(". ") +
l10n_util::GetStringUTF16(IDS_EXTENSION_INSTALL_PROCESS_CRASHED));
}
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 base::DictionaryValue& manifest) {
CHECK(unpacker_io_task_runner_->RunsTasksOnCurrentThread());
got_response_ = true;
scoped_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(manifest, install_icon);
}
void SandboxedUnpacker::OnUnpackExtensionFailed(const base::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() {
base::ScopedFILE file(base::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 base::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 base::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;
}
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.
scoped_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) {
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_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_.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 (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_->RunsTasksOnCurrentThread());
if (!temp_dir_.Delete()) {
LOG(WARNING) << "Can not delete temp directory at "
<< temp_dir_.path().value();
}
}
} // namespace extensions