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// Copyright (c) 2009 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/external_registry_extension_provider_win.h"
#include "base/file_path.h"
#include "base/registry.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "base/version.h"
// The Registry hive where to look for external extensions.
const HKEY kRegRoot = HKEY_LOCAL_MACHINE;
// The Registry subkey that contains information about external extensions.
const char kRegistryExtensions[] = "Software\\Google\\Chrome\\Extensions";
// Registry value of of that key that defines the path to the .crx file.
const wchar_t kRegistryExtensionPath[] = L"path";
// Registry value of that key that defines the current version of the .crx file.
const wchar_t kRegistryExtensionVersion[] = L"version";
ExternalRegistryExtensionProvider::ExternalRegistryExtensionProvider() {
}
ExternalRegistryExtensionProvider::~ExternalRegistryExtensionProvider() {
}
void ExternalRegistryExtensionProvider::VisitRegisteredExtension(
Visitor* visitor, const std::set<std::string>& ids_to_ignore) const {
RegistryKeyIterator iterator(kRegRoot,
ASCIIToWide(kRegistryExtensions).c_str());
while (iterator.Valid()) {
RegKey key;
std::wstring key_path = ASCIIToWide(kRegistryExtensions);
key_path.append(L"\\");
key_path.append(iterator.Name());
if (key.Open(kRegRoot, key_path.c_str(), KEY_READ)) {
std::wstring extension_path;
if (key.ReadValue(kRegistryExtensionPath, &extension_path)) {
std::wstring extension_version;
if (key.ReadValue(kRegistryExtensionVersion, &extension_version)) {
std::string id = WideToASCII(iterator.Name());
StringToLowerASCII(&id);
if (ids_to_ignore.find(id) != ids_to_ignore.end()) {
++iterator;
continue;
}
scoped_ptr<Version> version;
version.reset(Version::GetVersionFromString(extension_version));
if (!version.get()) {
LOG(ERROR) << "Invalid version value " << extension_version
<< " for key " << key_path;
continue;
}
FilePath path = FilePath::FromWStringHack(extension_path);
visitor->OnExternalExtensionFileFound(id, version.get(), path,
Extension::EXTERNAL_REGISTRY);
} else {
// TODO(erikkay): find a way to get this into about:extensions
LOG(ERROR) << "Missing value " << kRegistryExtensionVersion
<< " for key " << key_path;
}
} else {
// TODO(erikkay): find a way to get this into about:extensions
LOG(ERROR) << "Missing value " << kRegistryExtensionPath
<< " for key " << key_path;
}
}
++iterator;
}
}
Version* ExternalRegistryExtensionProvider::RegisteredVersion(
const std::string& id,
Extension::Location* location) const {
RegKey key;
std::wstring key_path = ASCIIToWide(kRegistryExtensions);
key_path.append(L"\\");
key_path.append(ASCIIToWide(id));
if (!key.Open(kRegRoot, key_path.c_str(), KEY_READ))
return NULL;
std::wstring extension_version;
if (!key.ReadValue(kRegistryExtensionVersion, &extension_version))
return NULL;
if (location)
*location = Extension::EXTERNAL_REGISTRY;
return Version::GetVersionFromString(extension_version);
}
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