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// Copyright 2014 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 "components/ownership/owner_settings_service.h"
#include <cryptohi.h>
#include <keyhi.h>
#include <stdint.h>
#include "base/bind.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "base/task_runner.h"
#include "base/task_runner_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/values.h"
#include "components/ownership/owner_key_util.h"
#include "crypto/scoped_nss_types.h"
namespace em = enterprise_management;
namespace ownership {
namespace {
using ScopedSGNContext = std::unique_ptr<
SGNContext,
crypto::NSSDestroyer1<SGNContext, SGN_DestroyContext, PR_TRUE>>;
std::unique_ptr<em::PolicyFetchResponse> AssembleAndSignPolicy(
std::unique_ptr<em::PolicyData> policy,
scoped_refptr<ownership::PrivateKey> private_key) {
DCHECK(private_key->key());
// Assemble the policy.
std::unique_ptr<em::PolicyFetchResponse> policy_response(
new em::PolicyFetchResponse());
if (!policy->SerializeToString(policy_response->mutable_policy_data())) {
LOG(ERROR) << "Failed to encode policy payload.";
return nullptr;
}
ScopedSGNContext sign_context(SGN_NewContext(
SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION, private_key->key()));
if (!sign_context) {
NOTREACHED();
return nullptr;
}
SECItem signature_item;
if (SGN_Begin(sign_context.get()) != SECSuccess ||
SGN_Update(sign_context.get(),
reinterpret_cast<const uint8_t*>(
policy_response->policy_data().c_str()),
policy_response->policy_data().size()) != SECSuccess ||
SGN_End(sign_context.get(), &signature_item) != SECSuccess) {
LOG(ERROR) << "Failed to create policy signature.";
return nullptr;
}
policy_response->mutable_policy_data_signature()->assign(
reinterpret_cast<const char*>(signature_item.data), signature_item.len);
SECITEM_FreeItem(&signature_item, PR_FALSE);
return policy_response;
}
} // namepace
OwnerSettingsService::OwnerSettingsService(
const scoped_refptr<ownership::OwnerKeyUtil>& owner_key_util)
: owner_key_util_(owner_key_util) {}
OwnerSettingsService::~OwnerSettingsService() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void OwnerSettingsService::AddObserver(Observer* observer) {
if (observer && !observers_.HasObserver(observer))
observers_.AddObserver(observer);
}
void OwnerSettingsService::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
bool OwnerSettingsService::IsReady() {
DCHECK(thread_checker_.CalledOnValidThread());
return private_key_.get();
}
bool OwnerSettingsService::IsOwner() {
DCHECK(thread_checker_.CalledOnValidThread());
return private_key_.get() && private_key_->key();
}
void OwnerSettingsService::IsOwnerAsync(const IsOwnerCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
if (private_key_.get()) {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, IsOwner()));
} else {
pending_is_owner_callbacks_.push_back(callback);
}
}
bool OwnerSettingsService::AssembleAndSignPolicyAsync(
base::TaskRunner* task_runner,
std::unique_ptr<em::PolicyData> policy,
const AssembleAndSignPolicyAsyncCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
if (!task_runner || !IsOwner())
return false;
return base::PostTaskAndReplyWithResult(
task_runner, FROM_HERE,
base::Bind(&AssembleAndSignPolicy, base::Passed(&policy), private_key_),
callback);
}
bool OwnerSettingsService::SetBoolean(const std::string& setting, bool value) {
DCHECK(thread_checker_.CalledOnValidThread());
base::Value in_value(value);
return Set(setting, in_value);
}
bool OwnerSettingsService::SetInteger(const std::string& setting, int value) {
DCHECK(thread_checker_.CalledOnValidThread());
base::Value in_value(value);
return Set(setting, in_value);
}
bool OwnerSettingsService::SetDouble(const std::string& setting, double value) {
DCHECK(thread_checker_.CalledOnValidThread());
base::Value in_value(value);
return Set(setting, in_value);
}
bool OwnerSettingsService::SetString(const std::string& setting,
const std::string& value) {
DCHECK(thread_checker_.CalledOnValidThread());
base::Value in_value(value);
return Set(setting, in_value);
}
void OwnerSettingsService::ReloadKeypair() {
ReloadKeypairImpl(
base::Bind(&OwnerSettingsService::OnKeypairLoaded, as_weak_ptr()));
}
void OwnerSettingsService::OnKeypairLoaded(
const scoped_refptr<PublicKey>& public_key,
const scoped_refptr<PrivateKey>& private_key) {
DCHECK(thread_checker_.CalledOnValidThread());
public_key_ = public_key;
private_key_ = private_key;
const bool is_owner = IsOwner();
std::vector<IsOwnerCallback> is_owner_callbacks;
is_owner_callbacks.swap(pending_is_owner_callbacks_);
for (std::vector<IsOwnerCallback>::iterator it(is_owner_callbacks.begin());
it != is_owner_callbacks.end();
++it) {
it->Run(is_owner);
}
OnPostKeypairLoadedActions();
}
} // namespace ownership
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