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// Copyright (c) 2011 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/policy/cloud_policy_cache_base.h"
#include <string>
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/values.h"
#include "chrome/browser/policy/enterprise_metrics.h"
#include "chrome/browser/policy/policy_notifier.h"
namespace policy {
CloudPolicyCacheBase::CloudPolicyCacheBase()
: notifier_(NULL),
initialization_complete_(false),
is_unmanaged_(false) {
public_key_version_.version = 0;
public_key_version_.valid = false;
}
CloudPolicyCacheBase::~CloudPolicyCacheBase() {
FOR_EACH_OBSERVER(Observer, observer_list_, OnCacheGoingAway(this));
}
void CloudPolicyCacheBase::AddObserver(Observer* observer) {
observer_list_.AddObserver(observer);
}
void CloudPolicyCacheBase::RemoveObserver(Observer* observer) {
observer_list_.RemoveObserver(observer);
}
void CloudPolicyCacheBase::Reset() {
last_policy_refresh_time_ = base::Time();
is_unmanaged_ = false;
mandatory_policy_.Clear();
recommended_policy_.Clear();
public_key_version_.version = 0;
public_key_version_.valid = false;
InformNotifier(CloudPolicySubsystem::UNENROLLED,
CloudPolicySubsystem::NO_DETAILS);
}
const PolicyMap* CloudPolicyCacheBase::policy(PolicyLevel level) {
switch (level) {
case POLICY_LEVEL_MANDATORY:
return &mandatory_policy_;
case POLICY_LEVEL_RECOMMENDED:
return &recommended_policy_;
}
NOTREACHED();
return NULL;
}
bool CloudPolicyCacheBase::GetPublicKeyVersion(int* version) {
if (public_key_version_.valid)
*version = public_key_version_.version;
return public_key_version_.valid;
}
bool CloudPolicyCacheBase::SetPolicyInternal(
const em::PolicyFetchResponse& policy,
base::Time* timestamp,
bool check_for_timestamp_validity) {
DCHECK(CalledOnValidThread());
bool initialization_was_not_complete = !initialization_complete_;
is_unmanaged_ = false;
PolicyMap mandatory_policy;
PolicyMap recommended_policy;
base::Time temp_timestamp;
PublicKeyVersion temp_public_key_version;
bool ok = DecodePolicyResponse(policy, &mandatory_policy, &recommended_policy,
&temp_timestamp, &temp_public_key_version);
if (!ok) {
LOG(WARNING) << "Decoding policy data failed.";
UMA_HISTOGRAM_ENUMERATION(kMetricPolicy, kMetricPolicyFetchInvalidPolicy,
kMetricPolicySize);
return false;
}
if (timestamp) {
*timestamp = temp_timestamp;
}
if (check_for_timestamp_validity &&
temp_timestamp > base::Time::NowFromSystemTime()) {
LOG(WARNING) << "Rejected policy data, file is from the future.";
UMA_HISTOGRAM_ENUMERATION(kMetricPolicy,
kMetricPolicyFetchTimestampInFuture,
kMetricPolicySize);
return false;
}
public_key_version_.version = temp_public_key_version.version;
public_key_version_.valid = temp_public_key_version.valid;
const bool new_policy_differs =
!mandatory_policy_.Equals(mandatory_policy) ||
!recommended_policy_.Equals(recommended_policy);
mandatory_policy_.Swap(&mandatory_policy);
recommended_policy_.Swap(&recommended_policy);
initialization_complete_ = true;
if (!new_policy_differs) {
UMA_HISTOGRAM_ENUMERATION(kMetricPolicy, kMetricPolicyFetchNotModified,
kMetricPolicySize);
}
if (new_policy_differs || initialization_was_not_complete) {
FOR_EACH_OBSERVER(Observer, observer_list_, OnCacheUpdate(this));
}
InformNotifier(CloudPolicySubsystem::SUCCESS,
CloudPolicySubsystem::NO_DETAILS);
return true;
}
void CloudPolicyCacheBase::SetUnmanagedInternal(const base::Time& timestamp) {
is_unmanaged_ = true;
initialization_complete_ = true;
public_key_version_.valid = false;
mandatory_policy_.Clear();
recommended_policy_.Clear();
last_policy_refresh_time_ = timestamp;
FOR_EACH_OBSERVER(Observer, observer_list_, OnCacheUpdate(this));
}
bool CloudPolicyCacheBase::DecodePolicyResponse(
const em::PolicyFetchResponse& policy_response,
PolicyMap* mandatory,
PolicyMap* recommended,
base::Time* timestamp,
PublicKeyVersion* public_key_version) {
std::string data = policy_response.policy_data();
em::PolicyData policy_data;
if (!policy_data.ParseFromString(data)) {
LOG(WARNING) << "Failed to parse PolicyData protobuf.";
return false;
}
if (timestamp) {
*timestamp = base::Time::UnixEpoch() +
base::TimeDelta::FromMilliseconds(policy_data.timestamp());
}
if (public_key_version) {
public_key_version->valid = policy_data.has_public_key_version();
if (public_key_version->valid)
public_key_version->version = policy_data.public_key_version();
}
return DecodePolicyData(policy_data, mandatory, recommended);
}
void CloudPolicyCacheBase::InformNotifier(
CloudPolicySubsystem::PolicySubsystemState state,
CloudPolicySubsystem::ErrorDetails error_details) {
// TODO(jkummerow): To obsolete this NULL-check, make all uses of
// UserPolicyCache explicitly set a notifier using |set_policy_notifier()|.
if (notifier_)
notifier_->Inform(state, error_details, PolicyNotifier::POLICY_CACHE);
}
} // namespace policy
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