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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.
#include "chrome/browser/protector/protector.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/protector/settings_change_global_error.h"
#include "chrome/browser/protector/keys.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_source.h"
#include "crypto/hmac.h"
using content::BrowserThread;
namespace protector {
Protector::Protector(Profile* profile)
: profile_(profile) {
}
Protector::~Protector() {
}
void Protector::OpenTab(const GURL& url) {
if (!error_.get() || !error_->browser()) {
LOG(WARNING) << "Don't have browser to show tab in.";
return;
}
error_->browser()->ShowSingletonTab(url);
}
void Protector::ShowChange(BaseSettingChange* change) {
DCHECK(change);
change_.reset(change);
DVLOG(1) << "Init change";
if (!change->Init(this)) {
LOG(WARNING) << "Error while initializing, removing ourselves";
BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
return;
}
error_.reset(new SettingsChangeGlobalError(change, this));
error_->ShowForProfile(profile_);
}
void Protector::DismissChange() {
DCHECK(error_.get());
error_->RemoveFromProfile();
}
void Protector::OnApplyChange() {
DVLOG(1) << "Apply change";
change_->Apply();
}
void Protector::OnDiscardChange() {
DVLOG(1) << "Discard change";
change_->Discard();
}
void Protector::OnDecisionTimeout() {
DVLOG(1) << "Timeout";
change_->Timeout();
}
void Protector::OnRemovedFromProfile() {
BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
}
std::string SignSetting(const std::string& value) {
crypto::HMAC hmac(crypto::HMAC::SHA256);
if (!hmac.Init(kProtectorSigningKey)) {
LOG(WARNING) << "Failed to initialize HMAC algorithm for signing";
return std::string();
}
std::vector<unsigned char> digest(hmac.DigestLength());
if (!hmac.Sign(value, &digest[0], digest.size())) {
LOG(WARNING) << "Failed to sign setting";
return std::string();
}
return std::string(&digest[0], &digest[0] + digest.size());
}
bool IsSettingValid(const std::string& value, const std::string& signature) {
crypto::HMAC hmac(crypto::HMAC::SHA256);
if (!hmac.Init(kProtectorSigningKey)) {
LOG(WARNING) << "Failed to initialize HMAC algorithm for verification.";
return false;
}
return hmac.Verify(value, signature);
}
void RegisterPrefs(PrefService* prefs) {
prefs->RegisterBooleanPref(prefs::kProtectorEnabled, false);
}
bool IsEnabled() {
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableProtector))
return false;
PrefService* local_state = g_browser_process->local_state();
return local_state->GetBoolean(prefs::kProtectorEnabled);
}
} // namespace protector
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