Componentize component_updater: Move over a bunch of files to the component.

chrome/browser/component_updater/component_unpacker.cc

Index: chrome/browser/component_updater/component_unpacker.cc
diff --git a/chrome/browser/component_updater/component_unpacker.cc b/chrome/browser/component_updater/component_unpacker.cc
deleted file mode 100644
index 74e8a8e6a842575b7c0dc21dd7ddd5bf1decf530..0000000000000000000000000000000000000000
--- a/chrome/browser/component_updater/component_unpacker.cc
+++ /dev/null
@@ -1,284 +0,0 @@
-// 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/component_updater/component_unpacker.h"
-
-#include <string>
-#include <vector>
-
-#include "base/bind.h"
-#include "base/file_util.h"
-#include "base/files/file_path.h"
-#include "base/files/scoped_file.h"
-#include "base/json/json_file_value_serializer.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/stringprintf.h"
-#include "base/values.h"
-#include "chrome/browser/component_updater/component_patcher.h"
-#include "chrome/browser/component_updater/component_patcher_operation.h"
-#include "chrome/browser/component_updater/component_updater_service.h"
-#include "components/crx_file/constants.h"
-#include "components/crx_file/crx_file.h"
-#include "crypto/secure_hash.h"
-#include "crypto/signature_verifier.h"
-#include "third_party/zlib/google/zip.h"
-
-using crypto::SecureHash;
-
-namespace component_updater {
-
-namespace {
-
-// This class makes sure that the CRX digital signature is valid
-// and well formed.
-class CRXValidator {
- public:
-  explicit CRXValidator(FILE* crx_file) : valid_(false), is_delta_(false) {
-    crx_file::CrxFile::Header header;
-    size_t len = fread(&header, 1, sizeof(header), crx_file);
-    if (len < sizeof(header))
-      return;
-
-    crx_file::CrxFile::Error error;
-    scoped_ptr<crx_file::CrxFile> crx(
-        crx_file::CrxFile::Parse(header, &error));
-    if (!crx.get())
-      return;
-    is_delta_ = crx_file::CrxFile::HeaderIsDelta(header);
-
-    std::vector<uint8> key(header.key_size);
-    len = fread(&key[0], sizeof(uint8), header.key_size, crx_file);
-    if (len < header.key_size)
-      return;
-
-    std::vector<uint8> signature(header.signature_size);
-    len = fread(&signature[0], sizeof(uint8), header.signature_size, crx_file);
-    if (len < header.signature_size)
-      return;
-
-    crypto::SignatureVerifier verifier;
-    if (!verifier.VerifyInit(crx_file::kSignatureAlgorithm,
-                             sizeof(crx_file::kSignatureAlgorithm),
-                             &signature[0],
-                             signature.size(),
-                             &key[0],
-                             key.size())) {
-      // Signature verification initialization failed. This is most likely
-      // caused by a public key in the wrong format (should encode algorithm).
-      return;
-    }
-
-    const size_t kBufSize = 8 * 1024;
-    scoped_ptr<uint8[]> buf(new uint8[kBufSize]);
-    while ((len = fread(buf.get(), 1, kBufSize, crx_file)) > 0)
-      verifier.VerifyUpdate(buf.get(), len);
-
-    if (!verifier.VerifyFinal())
-      return;
-
-    public_key_.swap(key);
-    valid_ = true;
-  }
-
-  bool valid() const { return valid_; }
-
-  bool is_delta() const { return is_delta_; }
-
-  const std::vector<uint8>& public_key() const { return public_key_; }
-
- private:
-  bool valid_;
-  bool is_delta_;
-  std::vector<uint8> public_key_;
-};
-
-}  // namespace
-
-ComponentUnpacker::ComponentUnpacker(
-    const std::vector<uint8>& pk_hash,
-    const base::FilePath& path,
-    const std::string& fingerprint,
-    ComponentInstaller* installer,
-    scoped_refptr<OutOfProcessPatcher> out_of_process_patcher,
-    scoped_refptr<base::SequencedTaskRunner> task_runner)
-    : pk_hash_(pk_hash),
-      path_(path),
-      is_delta_(false),
-      fingerprint_(fingerprint),
-      installer_(installer),
-      out_of_process_patcher_(out_of_process_patcher),
-      error_(kNone),
-      extended_error_(0),
-      task_runner_(task_runner) {
-}
-
-// TODO(cpu): add a specific attribute check to a component json that the
-// extension unpacker will reject, so that a component cannot be installed
-// as an extension.
-scoped_ptr<base::DictionaryValue> ReadManifest(
-    const base::FilePath& unpack_path) {
-  base::FilePath manifest =
-      unpack_path.Append(FILE_PATH_LITERAL("manifest.json"));
-  if (!base::PathExists(manifest))
-    return scoped_ptr<base::DictionaryValue>();
-  JSONFileValueSerializer serializer(manifest);
-  std::string error;
-  scoped_ptr<base::Value> root(serializer.Deserialize(NULL, &error));
-  if (!root.get())
-    return scoped_ptr<base::DictionaryValue>();
-  if (!root->IsType(base::Value::TYPE_DICTIONARY))
-    return scoped_ptr<base::DictionaryValue>();
-  return scoped_ptr<base::DictionaryValue>(
-             static_cast<base::DictionaryValue*>(root.release())).Pass();
-}
-
-bool ComponentUnpacker::UnpackInternal() {
-  return Verify() && Unzip() && BeginPatching();
-}
-
-void ComponentUnpacker::Unpack(const Callback& callback) {
-  callback_ = callback;
-  if (!UnpackInternal())
-    Finish();
-}
-
-bool ComponentUnpacker::Verify() {
-  VLOG(1) << "Verifying component: " << path_.value();
-  if (pk_hash_.empty() || path_.empty()) {
-    error_ = kInvalidParams;
-    return false;
-  }
-  // First, validate the CRX header and signature. As of today
-  // this is SHA1 with RSA 1024.
-  base::ScopedFILE file(base::OpenFile(path_, "rb"));
-  if (!file.get()) {
-    error_ = kInvalidFile;
-    return false;
-  }
-  CRXValidator validator(file.get());
-  file.reset();
-  if (!validator.valid()) {
-    error_ = kInvalidFile;
-    return false;
-  }
-  is_delta_ = validator.is_delta();
-
-  // File is valid and the digital signature matches. Now make sure
-  // the public key hash matches the expected hash. If they do we fully
-  // trust this CRX.
-  uint8 hash[32] = {};
-  scoped_ptr<SecureHash> sha256(SecureHash::Create(SecureHash::SHA256));
-  sha256->Update(&(validator.public_key()[0]), validator.public_key().size());
-  sha256->Finish(hash, arraysize(hash));
-
-  if (!std::equal(pk_hash_.begin(), pk_hash_.end(), hash)) {
-    VLOG(1) << "Hash mismatch: " << path_.value();
-    error_ = kInvalidId;
-    return false;
-  }
-  VLOG(1) << "Verification successful: " << path_.value();
-  return true;
-}
-
-bool ComponentUnpacker::Unzip() {
-  base::FilePath& destination = is_delta_ ? unpack_diff_path_ : unpack_path_;
-  VLOG(1) << "Unpacking in: " << destination.value();
-  if (!base::CreateNewTempDirectory(base::FilePath::StringType(),
-                                    &destination)) {
-    VLOG(1) << "Unable to create temporary directory for unpacking.";
-    error_ = kUnzipPathError;
-    return false;
-  }
-  if (!zip::Unzip(path_, destination)) {
-    VLOG(1) << "Unzipping failed.";
-    error_ = kUnzipFailed;
-    return false;
-  }
-  VLOG(1) << "Unpacked successfully";
-  return true;
-}
-
-bool ComponentUnpacker::BeginPatching() {
-  if (is_delta_) {  // Package is a diff package.
-    // Use a different temp directory for the patch output files.
-    if (!base::CreateNewTempDirectory(base::FilePath::StringType(),
-                                      &unpack_path_)) {
-      error_ = kUnzipPathError;
-      return false;
-    }
-    patcher_ = new ComponentPatcher(unpack_diff_path_,
-                                    unpack_path_,
-                                    installer_,
-                                    out_of_process_patcher_,
-                                    task_runner_);
-    task_runner_->PostTask(
-        FROM_HERE,
-        base::Bind(&ComponentPatcher::Start,
-                   patcher_,
-                   base::Bind(&ComponentUnpacker::EndPatching,
-                              scoped_refptr<ComponentUnpacker>(this))));
-  } else {
-    task_runner_->PostTask(FROM_HERE,
-                           base::Bind(&ComponentUnpacker::EndPatching,
-                                      scoped_refptr<ComponentUnpacker>(this),
-                                      kNone,
-                                      0));
-  }
-  return true;
-}
-
-void ComponentUnpacker::EndPatching(Error error, int extended_error) {
-  error_ = error;
-  extended_error_ = extended_error;
-  patcher_ = NULL;
-  if (error_ != kNone) {
-    Finish();
-    return;
-  }
-  // Optimization: clean up patch files early, in case disk space is too low to
-  // install otherwise.
-  if (!unpack_diff_path_.empty()) {
-    base::DeleteFile(unpack_diff_path_, true);
-    unpack_diff_path_.clear();
-  }
-  Install();
-  Finish();
-}
-
-void ComponentUnpacker::Install() {
-  // Write the fingerprint to disk.
-  if (static_cast<int>(fingerprint_.size()) !=
-      base::WriteFile(
-          unpack_path_.Append(FILE_PATH_LITERAL("manifest.fingerprint")),
-          fingerprint_.c_str(),
-          fingerprint_.size())) {
-    error_ = kFingerprintWriteFailed;
-    return;
-  }
-  scoped_ptr<base::DictionaryValue> manifest(ReadManifest(unpack_path_));
-  if (!manifest.get()) {
-    error_ = kBadManifest;
-    return;
-  }
-  DCHECK(error_ == kNone);
-  if (!installer_->Install(*manifest, unpack_path_)) {
-    error_ = kInstallerError;
-    return;
-  }
-}
-
-void ComponentUnpacker::Finish() {
-  if (!unpack_diff_path_.empty())
-    base::DeleteFile(unpack_diff_path_, true);
-  if (!unpack_path_.empty())
-    base::DeleteFile(unpack_path_, true);
-  callback_.Run(error_, extended_error_);
-}
-
-ComponentUnpacker::~ComponentUnpacker() {
-}
-
-}  // namespace component_updater