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// 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.
#ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_
#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/files/file_path.h"
class ComponentInstaller;
class ComponentPatcher;
// In charge of unpacking the component CRX package and verifying that it is
// well formed and the cryptographic signature is correct. If there is no
// error the component specific installer will be invoked to proceed with
// the component installation or update.
//
// This class should be used only by the component updater. It is inspired
// and overlaps with code in the extension's SandboxedUnpacker.
// The main differences are:
// - The public key hash is full SHA256.
// - Does not use a sandboxed unpacker. A valid component is fully trusted.
// - The manifest can have different attributes and resources are not
// transcoded.
class ComponentUnpacker {
public:
// Possible error conditions.
// Add only to the bottom of this enum; the order must be kept stable.
enum Error {
kNone,
kInvalidParams,
kInvalidFile,
kUnzipPathError,
kUnzipFailed,
kNoManifest,
kBadManifest,
kBadExtension,
kInvalidId,
kInstallerError,
kIoError,
kDeltaVerificationFailure,
kDeltaBadCommands,
kDeltaUnsupportedCommand,
kDeltaOperationFailure,
kDeltaPatchProcessFailure,
kDeltaMissingExistingFile,
kFingerprintWriteFailed,
};
// Unpacks, verifies and calls the installer. |pk_hash| is the expected
// public key SHA256 hash. |path| is the current location of the CRX.
ComponentUnpacker(const std::vector<uint8>& pk_hash,
const base::FilePath& path,
const std::string& fingerprint,
ComponentPatcher* patcher,
ComponentInstaller* installer);
// If something went wrong during unpacking or installer invocation, the
// destructor will delete the unpacked CRX files.
~ComponentUnpacker();
Error error() const { return error_; }
int extended_error() const { return extended_error_; }
private:
base::FilePath unpack_path_;
Error error_;
int extended_error_; // Provides additional error information.
};
#endif // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_
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