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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/cert/cert_database.h"
#include <Security/Security.h>
#include "base/apple/osstatus_logging.h"
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/notreached.h"
#include "base/process/process_handle.h"
#include "net/base/network_notification_thread_mac.h"
namespace net {
namespace {
// Helper that observes events from the Keychain and forwards them to the
// CertDatabase.
class Notifier {
public:
Notifier() {
GetNetworkNotificationThreadMac()->PostTask(
FROM_HERE, base::BindOnce(&Notifier::Init, base::Unretained(this)));
}
~Notifier() = delete;
// Much of the Keychain API was marked deprecated as of the macOS 13 SDK.
// Removal of its use is tracked in https://crbug.com/1348251 but deprecation
// warnings are disabled in the meanwhile.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
private:
void Init() {
SecKeychainEventMask event_mask =
kSecKeychainListChangedMask | kSecTrustSettingsChangedEventMask;
SecKeychainAddCallback(&Notifier::KeychainCallback, event_mask, nullptr);
}
#pragma clang diagnostic pop
// SecKeychainCallback function that receives notifications from securityd
// and forwards them to the |cert_db_|.
static OSStatus KeychainCallback(SecKeychainEvent keychain_event,
SecKeychainCallbackInfo* info,
void* context);
};
// static
OSStatus Notifier::KeychainCallback(SecKeychainEvent keychain_event,
SecKeychainCallbackInfo* info,
void* context) {
if (info->version > SEC_KEYCHAIN_SETTINGS_VERS1) {
NOTREACHED();
}
if (info->pid == base::GetCurrentProcId()) {
// Ignore events generated by the current process, as the assumption is
// that they have already been handled. This may miss events that
// originated as a result of spawning native dialogs that allow the user
// to modify Keychain settings. However, err on the side of missing
// events rather than sending too many events.
return errSecSuccess;
}
switch (keychain_event) {
case kSecKeychainListChangedEvent:
CertDatabase::GetInstance()->NotifyObserversClientCertStoreChanged();
break;
case kSecTrustSettingsChangedEvent:
CertDatabase::GetInstance()->NotifyObserversTrustStoreChanged();
break;
default:
break;
}
return errSecSuccess;
}
} // namespace
void CertDatabase::StartListeningForKeychainEvents() {
static base::NoDestructor<Notifier> notifier;
}
} // namespace net
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