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/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebAuthnProcessProxy.h"
#if ENABLE(WEB_AUTHN)
#include "Logging.h"
#include "WebAuthnProcessConnectionInfo.h"
#include "WebAuthnProcessCreationParameters.h"
#include "WebAuthnProcessMessages.h"
#include "WebAuthnProcessProxyMessages.h"
#include "WebPageMessages.h"
#include "WebPageProxy.h"
#include "WebProcessMessages.h"
#include "WebProcessPool.h"
#include "WebProcessProxy.h"
#include "WebProcessProxyMessages.h"
#include <WebCore/RuntimeApplicationChecks.h>
#include <wtf/CompletionHandler.h>
#if PLATFORM(IOS_FAMILY)
#include <wtf/spi/darwin/XPCSPI.h>
#endif
#define MESSAGE_CHECK(assertion) MESSAGE_CHECK_BASE(assertion, this->connection())
namespace WebKit {
using namespace WebCore;
WebAuthnProcessProxy& WebAuthnProcessProxy::singleton()
{
ASSERT(RunLoop::isMain());
static std::once_flag onceFlag;
static LazyNeverDestroyed<Ref<WebAuthnProcessProxy>> webAuthnProcess;
std::call_once(onceFlag, [] {
webAuthnProcess.construct(adoptRef(*new WebAuthnProcessProxy));
WebAuthnProcessCreationParameters parameters;
// Initialize the WebAuthn process.
webAuthnProcess.get()->send(Messages::WebAuthnProcess::InitializeWebAuthnProcess(parameters), 0);
webAuthnProcess.get()->updateProcessAssertion();
});
return webAuthnProcess.get();
}
WebAuthnProcessProxy::WebAuthnProcessProxy()
: AuxiliaryProcessProxy()
, m_throttler(*this, false)
{
connect();
}
WebAuthnProcessProxy::~WebAuthnProcessProxy() = default;
void WebAuthnProcessProxy::getLaunchOptions(ProcessLauncher::LaunchOptions& launchOptions)
{
launchOptions.processType = ProcessLauncher::ProcessType::WebAuthn;
AuxiliaryProcessProxy::getLaunchOptions(launchOptions);
}
void WebAuthnProcessProxy::connectionWillOpen(IPC::Connection&)
{
}
void WebAuthnProcessProxy::processWillShutDown(IPC::Connection& connection)
{
ASSERT_UNUSED(connection, this->connection() == &connection);
}
void WebAuthnProcessProxy::getWebAuthnProcessConnection(WebProcessProxy& webProcessProxy, Messages::WebProcessProxy::GetWebAuthnProcessConnection::DelayedReply&& reply)
{
RELEASE_LOG(ProcessSuspension, "%p - WebAuthnProcessProxy is taking a background assertion because a web process is requesting a connection", this);
sendWithAsyncReply(Messages::WebAuthnProcess::CreateWebAuthnConnectionToWebProcess { webProcessProxy.coreProcessIdentifier() }, [this, weakThis = makeWeakPtr(*this), reply = WTFMove(reply)](auto&& identifier) mutable {
if (!weakThis) {
RELEASE_LOG_ERROR(Process, "WebAuthnProcessProxy::getWebAuthnProcessConnection: WebAuthnProcessProxy deallocated during connection establishment");
return reply({ });
}
if (!identifier) {
RELEASE_LOG_ERROR(Process, "WebAuthnProcessProxy::getWebAuthnProcessConnection: connection identifier is empty");
return reply({ });
}
MESSAGE_CHECK(MACH_PORT_VALID(identifier->port()));
reply(WebAuthnProcessConnectionInfo { IPC::Attachment { identifier->port(), MACH_MSG_TYPE_MOVE_SEND } });
}, 0, IPC::SendOption::DispatchMessageEvenWhenWaitingForSyncReply);
}
void WebAuthnProcessProxy::webAuthnProcessCrashed()
{
for (auto& processPool : WebProcessPool::allProcessPools())
processPool->terminateAllWebContentProcesses();
}
void WebAuthnProcessProxy::didClose(IPC::Connection&)
{
// This will cause us to be deleted.
webAuthnProcessCrashed();
}
void WebAuthnProcessProxy::didReceiveInvalidMessage(IPC::Connection& connection, IPC::MessageName messageName)
{
logInvalidMessage(connection, messageName);
WebProcessPool::didReceiveInvalidMessage(messageName);
// Terminate the WebAuthn process.
terminate();
// Since we've invalidated the connection we'll never get a IPC::Connection::Client::didClose
// callback so we'll explicitly call it here instead.
didClose(connection);
}
void WebAuthnProcessProxy::didFinishLaunching(ProcessLauncher* launcher, IPC::Connection::Identifier connectionIdentifier)
{
AuxiliaryProcessProxy::didFinishLaunching(launcher, connectionIdentifier);
if (!IPC::Connection::identifierIsValid(connectionIdentifier)) {
webAuthnProcessCrashed();
return;
}
#if PLATFORM(IOS_FAMILY)
if (xpc_connection_t connection = this->connection()->xpcConnection())
m_throttler.didConnectToProcess(xpc_connection_get_pid(connection));
#endif
}
void WebAuthnProcessProxy::updateProcessAssertion()
{
bool hasAnyForegroundWebProcesses = false;
bool hasAnyBackgroundWebProcesses = false;
for (auto& processPool : WebProcessPool::allProcessPools()) {
hasAnyForegroundWebProcesses |= processPool->hasForegroundWebProcesses();
hasAnyBackgroundWebProcesses |= processPool->hasBackgroundWebProcesses();
}
if (hasAnyForegroundWebProcesses) {
if (!ProcessThrottler::isValidForegroundActivity(m_activityFromWebProcesses)) {
m_activityFromWebProcesses = throttler().foregroundActivity("WebAuthn for foreground view(s)"_s);
}
return;
}
if (hasAnyBackgroundWebProcesses) {
if (!ProcessThrottler::isValidBackgroundActivity(m_activityFromWebProcesses)) {
m_activityFromWebProcesses = throttler().backgroundActivity("WebAuthn for background view(s)"_s);
}
return;
}
m_activityFromWebProcesses = nullptr;
}
} // namespace WebKit
#undef MESSAGE_CHECK
#endif // ENABLE(WEB_AUTHN)
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