1 files changed, 87 insertions, 0 deletions
diff --git a/dom/webauthn/WebAuthnTransactionChild.cpp b/dom/webauthn/WebAuthnTransactionChild.cpp
new file mode 100644
index 0000000000..15022ff981
--- /dev/null
+++ b/dom/webauthn/WebAuthnTransactionChild.cpp
@@ -0,0 +1,87 @@
+/* -*- 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/WebAuthnTransactionChild.h"
+
+namespace mozilla::dom {
+
+WebAuthnTransactionChild::WebAuthnTransactionChild(
+    WebAuthnManagerBase* aManager)
+    : mManager(aManager) {
+  MOZ_ASSERT(aManager);
+
+  // Retain a reference so the task object isn't deleted without IPDL's
+  // knowledge. The reference will be released by
+  // mozilla::ipc::BackgroundChildImpl::DeallocPWebAuthnTransactionChild.
+  NS_ADDREF_THIS();
+}
+
+mozilla::ipc::IPCResult WebAuthnTransactionChild::RecvConfirmRegister(
+    const uint64_t& aTransactionId,
+    const WebAuthnMakeCredentialResult& aResult) {
+  if (NS_WARN_IF(!mManager)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  // We don't own the reference to mManager. We need to prevent its refcount
+  // going to 0 while we call anything that can reach the call to
+  // StopListeningForVisibilityEvents in WebAuthnManager::ClearTransaction
+  // (often via WebAuthnManager::RejectTransaction).
+  RefPtr<WebAuthnManagerBase> kungFuDeathGrip(mManager);
+  kungFuDeathGrip->FinishMakeCredential(aTransactionId, aResult);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult WebAuthnTransactionChild::RecvConfirmSign(
+    const uint64_t& aTransactionId, const WebAuthnGetAssertionResult& aResult) {
+  if (NS_WARN_IF(!mManager)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  // We don't own the reference to mManager. We need to prevent its refcount
+  // going to 0 while we call anything that can reach the call to
+  // StopListeningForVisibilityEvents in WebAuthnManager::ClearTransaction
+  // (often via WebAuthnManager::RejectTransaction).
+  RefPtr<WebAuthnManagerBase> kungFuDeathGrip(mManager);
+  kungFuDeathGrip->FinishGetAssertion(aTransactionId, aResult);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult WebAuthnTransactionChild::RecvAbort(
+    const uint64_t& aTransactionId, const nsresult& aError) {
+  if (NS_WARN_IF(!mManager)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+
+  // We don't own the reference to mManager. We need to prevent its refcount
+  // going to 0 while we call anything that can reach the call to
+  // StopListeningForVisibilityEvents in WebAuthnManager::ClearTransaction
+  // (often via WebAuthnManager::RejectTransaction).
+  RefPtr<WebAuthnManagerBase> kungFuDeathGrip(mManager);
+  kungFuDeathGrip->RequestAborted(aTransactionId, aError);
+  return IPC_OK();
+}
+
+void WebAuthnTransactionChild::ActorDestroy(ActorDestroyReason why) {
+  // Called by either a __delete__ message from the parent, or when the
+  // channel disconnects. Clear out the child actor reference to be sure.
+  if (mManager) {
+    mManager->ActorDestroyed();
+    mManager = nullptr;
+  }
+}
+
+void WebAuthnTransactionChild::Disconnect() {
+  mManager = nullptr;
+
+  // The WebAuthnManager released us, but we're going to be held alive by the
+  // IPC layer. The parent will explicitly destroy us via Send__delete__(),
+  // after receiving the DestroyMe message.
+
+  SendDestroyMe();
+}
+
+}  // namespace mozilla::dom