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gecko-dev/dom/webauthn/WebAuthnTransactionParent.cpp
John Schanck ef24c8f842 Bug 1863135 - reset webauthn service after transaction completion. r=keeler 
authenticator-rs keeps its device monitor thread alive after a transaction has
completed. This is a workaround to ensure that the device monitor thread does
not prevent the browser from closing.

Differential Revision: https://phabricator.services.mozilla.com/D193481
2023-11-16 17:33:34 +00:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/WebAuthnTransactionParent.h"
#include "mozilla/ipc/PBackgroundParent.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "mozilla/StaticPrefs_security.h"
#include "nsThreadUtils.h"
#include "WebAuthnArgs.h"
namespace mozilla::dom {
void WebAuthnTransactionParent::CompleteTransaction() {
if (mTransactionId.isSome()) {
if (mRegisterPromiseRequest.Exists()) {
mRegisterPromiseRequest.Complete();
}
if (mSignPromiseRequest.Exists()) {
mSignPromiseRequest.Complete();
}
if (mWebAuthnService) {
// We have to do this to work around Bug 1864526.
mWebAuthnService->Cancel(mTransactionId.ref());
}
mTransactionId.reset();
}
}
void WebAuthnTransactionParent::DisconnectTransaction() {
mTransactionId.reset();
mRegisterPromiseRequest.DisconnectIfExists();
mSignPromiseRequest.DisconnectIfExists();
if (mWebAuthnService) {
mWebAuthnService->Reset();
}
}
mozilla::ipc::IPCResult WebAuthnTransactionParent::RecvRequestRegister(
const uint64_t& aTransactionId,
const WebAuthnMakeCredentialInfo& aTransactionInfo) {
::mozilla::ipc::AssertIsOnBackgroundThread();
if (!mWebAuthnService) {
mWebAuthnService = do_GetService("@mozilla.org/webauthn/service;1");
if (!mWebAuthnService) {
return IPC_FAIL_NO_REASON(this);
}
}
// If there's an ongoing transaction, abort it.
if (mTransactionId.isSome()) {
DisconnectTransaction();
Unused << SendAbort(mTransactionId.ref(), NS_ERROR_DOM_ABORT_ERR);
}
mTransactionId = Some(aTransactionId);
RefPtr<WebAuthnRegisterPromiseHolder> promiseHolder =
new WebAuthnRegisterPromiseHolder(GetCurrentSerialEventTarget());
PWebAuthnTransactionParent* parent = this;
RefPtr<WebAuthnRegisterPromise> promise = promiseHolder->Ensure();
promise
->Then(
GetCurrentSerialEventTarget(), __func__,
[this, parent, aTransactionId,
inputClientData = aTransactionInfo.ClientDataJSON()](
const WebAuthnRegisterPromise::ResolveValueType& aValue) {
CompleteTransaction();
nsCString clientData;
nsresult rv = aValue->GetClientDataJSON(clientData);
if (rv == NS_ERROR_NOT_AVAILABLE) {
clientData = inputClientData;
} else if (NS_FAILED(rv)) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> attObj;
rv = aValue->GetAttestationObject(attObj);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> credentialId;
rv = aValue->GetCredentialId(credentialId);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<nsString> transports;
rv = aValue->GetTransports(transports);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
Maybe<nsString> authenticatorAttachment;
nsString maybeAuthenticatorAttachment;
rv = aValue->GetAuthenticatorAttachment(
maybeAuthenticatorAttachment);
if (rv != NS_ERROR_NOT_AVAILABLE) {
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
authenticatorAttachment = Some(maybeAuthenticatorAttachment);
}
nsTArray<WebAuthnExtensionResult> extensions;
bool credPropsRk;
rv = aValue->GetCredPropsRk(&credPropsRk);
if (rv != NS_ERROR_NOT_AVAILABLE) {
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
extensions.AppendElement(
WebAuthnExtensionResultCredProps(credPropsRk));
}
bool hmacCreateSecret;
rv = aValue->GetHmacCreateSecret(&hmacCreateSecret);
if (rv != NS_ERROR_NOT_AVAILABLE) {
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
extensions.AppendElement(
WebAuthnExtensionResultHmacSecret(hmacCreateSecret));
}
WebAuthnMakeCredentialResult result(
clientData, attObj, credentialId, transports, extensions,
authenticatorAttachment);
Unused << parent->SendConfirmRegister(aTransactionId, result);
},
[this, parent, aTransactionId](
const WebAuthnRegisterPromise::RejectValueType aValue) {
CompleteTransaction();
Unused << parent->SendAbort(aTransactionId, aValue);
})
->Track(mRegisterPromiseRequest);
uint64_t browsingContextId = aTransactionInfo.BrowsingContextId();
RefPtr<WebAuthnRegisterArgs> args(new WebAuthnRegisterArgs(aTransactionInfo));
nsresult rv = mWebAuthnService->MakeCredential(
aTransactionId, browsingContextId, args, promiseHolder);
if (NS_FAILED(rv)) {
promiseHolder->Reject(NS_ERROR_DOM_NOT_ALLOWED_ERR);
}
return IPC_OK();
}
mozilla::ipc::IPCResult WebAuthnTransactionParent::RecvRequestSign(
const uint64_t& aTransactionId,
const WebAuthnGetAssertionInfo& aTransactionInfo) {
::mozilla::ipc::AssertIsOnBackgroundThread();
if (!mWebAuthnService) {
mWebAuthnService = do_GetService("@mozilla.org/webauthn/service;1");
if (!mWebAuthnService) {
return IPC_FAIL_NO_REASON(this);
}
}
if (mTransactionId.isSome()) {
DisconnectTransaction();
Unused << SendAbort(mTransactionId.ref(), NS_ERROR_DOM_ABORT_ERR);
}
mTransactionId = Some(aTransactionId);
RefPtr<WebAuthnSignPromiseHolder> promiseHolder =
new WebAuthnSignPromiseHolder(GetCurrentSerialEventTarget());
PWebAuthnTransactionParent* parent = this;
RefPtr<WebAuthnSignPromise> promise = promiseHolder->Ensure();
promise
->Then(
GetCurrentSerialEventTarget(), __func__,
[this, parent, aTransactionId,
inputClientData = aTransactionInfo.ClientDataJSON()](
const WebAuthnSignPromise::ResolveValueType& aValue) {
CompleteTransaction();
nsCString clientData;
nsresult rv = aValue->GetClientDataJSON(clientData);
if (rv == NS_ERROR_NOT_AVAILABLE) {
clientData = inputClientData;
} else if (NS_FAILED(rv)) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> credentialId;
rv = aValue->GetCredentialId(credentialId);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> signature;
rv = aValue->GetSignature(signature);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> authenticatorData;
rv = aValue->GetAuthenticatorData(authenticatorData);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
nsTArray<uint8_t> userHandle;
Unused << aValue->GetUserHandle(userHandle); // optional
Maybe<nsString> authenticatorAttachment;
nsString maybeAuthenticatorAttachment;
rv = aValue->GetAuthenticatorAttachment(
maybeAuthenticatorAttachment);
if (rv != NS_ERROR_NOT_AVAILABLE) {
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
authenticatorAttachment = Some(maybeAuthenticatorAttachment);
}
nsTArray<WebAuthnExtensionResult> extensions;
bool usedAppId;
rv = aValue->GetUsedAppId(&usedAppId);
if (rv != NS_ERROR_NOT_AVAILABLE) {
if (NS_FAILED(rv)) {
Unused << parent->SendAbort(aTransactionId,
NS_ERROR_DOM_NOT_ALLOWED_ERR);
return;
}
extensions.AppendElement(WebAuthnExtensionResultAppId(usedAppId));
}
WebAuthnGetAssertionResult result(
clientData, credentialId, signature, authenticatorData,
extensions, userHandle, authenticatorAttachment);
Unused << parent->SendConfirmSign(aTransactionId, result);
},
[this, parent,
aTransactionId](const WebAuthnSignPromise::RejectValueType aValue) {
CompleteTransaction();
Unused << parent->SendAbort(aTransactionId, aValue);
})
->Track(mSignPromiseRequest);
RefPtr<WebAuthnSignArgs> args(new WebAuthnSignArgs(aTransactionInfo));
nsresult rv = mWebAuthnService->GetAssertion(
aTransactionId, aTransactionInfo.BrowsingContextId(), args,
promiseHolder);
if (NS_FAILED(rv)) {
promiseHolder->Reject(NS_ERROR_DOM_NOT_ALLOWED_ERR);
}
return IPC_OK();
}
mozilla::ipc::IPCResult WebAuthnTransactionParent::RecvRequestCancel(
const Tainted<uint64_t>& aTransactionId) {
::mozilla::ipc::AssertIsOnBackgroundThread();
if (mTransactionId.isNothing() ||
!MOZ_IS_VALID(aTransactionId, mTransactionId.ref() == aTransactionId)) {
return IPC_OK();
}
DisconnectTransaction();
return IPC_OK();
}
mozilla::ipc::IPCResult WebAuthnTransactionParent::RecvRequestIsUVPAA(
RequestIsUVPAAResolver&& aResolver) {
#ifdef MOZ_WIDGET_ANDROID
// Try the nsIWebAuthnService. If we're configured for tests we
// will get a result. Otherwise we expect NS_ERROR_NOT_IMPLEMENTED.
nsCOMPtr<nsIWebAuthnService> service(
do_GetService("@mozilla.org/webauthn/service;1"));
bool available;
nsresult rv = service->GetIsUVPAA(&available);
if (NS_SUCCEEDED(rv)) {
aResolver(available);
return IPC_OK();
}
// Don't consult the platform API if resident key support is disabled.
if (!StaticPrefs::
security_webauthn_webauthn_enable_android_fido2_residentkey()) {
aResolver(false);
return IPC_OK();
}
// The GeckoView implementation of
// isUserVerifiyingPlatformAuthenticatorAvailable does not block, but we must
// call it on the main thread. It returns a MozPromise which we can ->Then to
// call aResolver on the IPDL background thread.
//
// Bug 1550788: there is an unnecessary layer of dispatching here: ipdl ->
// main -> a background thread. Other platforms just do ipdl -> a background
// thread.
nsCOMPtr<nsISerialEventTarget> target = GetCurrentSerialEventTarget();
nsCOMPtr<nsIRunnable> runnable(NS_NewRunnableFunction(
__func__, [target, resolver = std::move(aResolver)]() {
auto result = java::WebAuthnTokenManager::
WebAuthnIsUserVerifyingPlatformAuthenticatorAvailable();
auto geckoResult = java::GeckoResult::LocalRef(std::move(result));
MozPromise<bool, bool, false>::FromGeckoResult(geckoResult)
->Then(
target, __func__,
[resolver](
const MozPromise<bool, bool, false>::ResolveOrRejectValue&
aValue) {
if (aValue.IsResolve()) {
resolver(aValue.ResolveValue());
} else {
resolver(false);
}
});
}));
NS_DispatchToMainThread(runnable.forget());
return IPC_OK();
#else
nsCOMPtr<nsISerialEventTarget> target = GetCurrentSerialEventTarget();
nsCOMPtr<nsIRunnable> runnable(NS_NewRunnableFunction(
__func__, [target, resolver = std::move(aResolver)]() {
bool available;
nsCOMPtr<nsIWebAuthnService> service(
do_GetService("@mozilla.org/webauthn/service;1"));
nsresult rv = service->GetIsUVPAA(&available);
if (NS_FAILED(rv)) {
available = false;
}
BoolPromise::CreateAndResolve(available, __func__)
->Then(target, __func__,
[resolver](const BoolPromise::ResolveOrRejectValue& value) {
if (value.IsResolve()) {
resolver(value.ResolveValue());
} else {
resolver(false);
}
});
}));
NS_DispatchBackgroundTask(runnable.forget(), NS_DISPATCH_EVENT_MAY_BLOCK);
return IPC_OK();
#endif
}
mozilla::ipc::IPCResult WebAuthnTransactionParent::RecvDestroyMe() {
::mozilla::ipc::AssertIsOnBackgroundThread();
// The child was disconnected from the WebAuthnManager instance and will send
// no further messages. It is kept alive until we delete it explicitly.
// The child should have cancelled any active transaction. This means
// we expect no more messages to the child. We'll crash otherwise.
// The IPC roundtrip is complete. No more messages, hopefully.
IProtocol* mgr = Manager();
if (!Send__delete__(this)) {
return IPC_FAIL_NO_REASON(mgr);
}
return IPC_OK();
}
void WebAuthnTransactionParent::ActorDestroy(ActorDestroyReason aWhy) {
::mozilla::ipc::AssertIsOnBackgroundThread();
// Called either by Send__delete__() in RecvDestroyMe() above, or when
// the channel disconnects. Ensure the token manager forgets about us.
if (mTransactionId.isSome()) {
DisconnectTransaction();
}
}
} // namespace mozilla::dom
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