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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_service.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/notification_source.h"
#include "crypto/hmac.h"
namespace protector {
ProtectorService::ProtectorService(Profile* profile)
: profile_(profile) {
}
ProtectorService::~ProtectorService() {
DCHECK(!IsShowingChange()); // Should have been dismissed by Shutdown.
}
void ProtectorService::ShowChange(BaseSettingChange* change) {
DCHECK(change);
change_.reset(change);
DVLOG(1) << "Init change";
if (!change->Init(profile_)) {
LOG(WARNING) << "Error while initializing, dismissing change";
change_.reset();
return;
}
error_.reset(new SettingsChangeGlobalError(change, this));
error_->ShowForProfile(profile_);
}
bool ProtectorService::IsShowingChange() const {
return change_.get() != NULL;
}
void ProtectorService::ApplyChange(Browser* browser) {
DCHECK(IsShowingChange());
change_->Apply(browser);
DismissChange();
}
void ProtectorService::DiscardChange(Browser* browser) {
DCHECK(IsShowingChange());
change_->Discard(browser);
DismissChange();
}
void ProtectorService::DismissChange() {
DCHECK(IsShowingChange());
error_->RemoveFromProfile();
DCHECK(!IsShowingChange());
}
void ProtectorService::OpenTab(const GURL& url, Browser* browser) {
DCHECK(browser);
browser->ShowSingletonTab(url);
}
void ProtectorService::Shutdown() {
if (IsShowingChange())
DismissChange();
}
void ProtectorService::OnApplyChange(Browser* browser) {
DVLOG(1) << "Apply change";
DCHECK(IsShowingChange());
change_->Apply(browser);
}
void ProtectorService::OnDiscardChange(Browser* browser) {
DVLOG(1) << "Discard change";
DCHECK(IsShowingChange());
change_->Discard(browser);
}
void ProtectorService::OnDecisionTimeout() {
DVLOG(1) << "Timeout";
DCHECK(IsShowingChange());
change_->Timeout();
}
void ProtectorService::OnRemovedFromProfile() {
DCHECK(IsShowingChange());
error_.reset();
change_.reset();
}
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);
}
bool IsEnabled() {
return !CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoProtector);
}
} // namespace protector
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