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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/peerconnection/rtc_certificate_generator.h"
#include <string>
#include <utility>
#include "base/functional/bind.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/modules/peerconnection/peer_connection_dependency_factory.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/webrtc/api/scoped_refptr.h"
#include "third_party/webrtc/rtc_base/rtc_certificate.h"
#include "third_party/webrtc/rtc_base/rtc_certificate_generator.h"
namespace blink {
namespace {
// A certificate generation request spawned by
// |GenerateCertificateWithOptionalExpiration|. This
// is handled by a separate class so that reference counting can keep the
// request alive independently of the |RTCCertificateGenerator| that spawned it.
class RTCCertificateGeneratorRequest
: public WTF::ThreadSafeRefCounted<RTCCertificateGeneratorRequest> {
public:
RTCCertificateGeneratorRequest(
const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
const scoped_refptr<base::SingleThreadTaskRunner>& worker_thread)
: main_thread_(main_thread), worker_thread_(worker_thread) {
DCHECK(main_thread_);
DCHECK(worker_thread_);
}
void GenerateCertificateAsync(
const webrtc::KeyParams& key_params,
const std::optional<uint64_t>& expires_ms,
blink::RTCCertificateCallback completion_callback) {
DCHECK(main_thread_->BelongsToCurrentThread());
DCHECK(completion_callback);
worker_thread_->PostTask(
FROM_HERE,
base::BindOnce(
&RTCCertificateGeneratorRequest::GenerateCertificateOnWorkerThread,
this, key_params, expires_ms, std::move(completion_callback)));
}
private:
friend class WTF::ThreadSafeRefCounted<RTCCertificateGeneratorRequest>;
~RTCCertificateGeneratorRequest() {}
void GenerateCertificateOnWorkerThread(
const webrtc::KeyParams key_params,
const std::optional<uint64_t> expires_ms,
blink::RTCCertificateCallback completion_callback) {
DCHECK(worker_thread_->BelongsToCurrentThread());
webrtc::scoped_refptr<webrtc::RTCCertificate> certificate =
webrtc::RTCCertificateGenerator::GenerateCertificate(key_params,
expires_ms);
main_thread_->PostTask(
FROM_HERE,
base::BindOnce(&RTCCertificateGeneratorRequest::DoCallbackOnMainThread,
this, std::move(completion_callback), certificate));
}
void DoCallbackOnMainThread(
blink::RTCCertificateCallback completion_callback,
webrtc::scoped_refptr<webrtc::RTCCertificate> certificate) {
DCHECK(main_thread_->BelongsToCurrentThread());
DCHECK(completion_callback);
std::move(completion_callback).Run(std::move(certificate));
}
// The main thread is the renderer thread.
const scoped_refptr<base::SingleThreadTaskRunner> main_thread_;
// The WebRTC worker thread.
const scoped_refptr<base::SingleThreadTaskRunner> worker_thread_;
};
void GenerateCertificateWithOptionalExpiration(
const webrtc::KeyParams& key_params,
const std::optional<uint64_t>& expires_ms,
blink::RTCCertificateCallback completion_callback,
ExecutionContext& context,
scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
DCHECK(key_params.IsValid());
if (context.IsContextDestroyed()) {
// If the context is destroyed we won't be able to access the
// PeerConnectionDependencyFactory. Reject the promise by returning a null
// certificate.
std::move(completion_callback).Run(nullptr);
return;
}
auto& pc_dependency_factory =
blink::PeerConnectionDependencyFactory::From(context);
pc_dependency_factory.EnsureInitialized();
scoped_refptr<RTCCertificateGeneratorRequest> request =
base::MakeRefCounted<RTCCertificateGeneratorRequest>(
task_runner, pc_dependency_factory.GetWebRtcNetworkTaskRunner());
request->GenerateCertificateAsync(key_params, expires_ms,
std::move(completion_callback));
}
} // namespace
void RTCCertificateGenerator::GenerateCertificate(
const webrtc::KeyParams& key_params,
blink::RTCCertificateCallback completion_callback,
ExecutionContext& context,
scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
GenerateCertificateWithOptionalExpiration(key_params, std::nullopt,
std::move(completion_callback),
context, task_runner);
}
void RTCCertificateGenerator::GenerateCertificateWithExpiration(
const webrtc::KeyParams& key_params,
uint64_t expires_ms,
blink::RTCCertificateCallback completion_callback,
ExecutionContext& context,
scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
GenerateCertificateWithOptionalExpiration(key_params, expires_ms,
std::move(completion_callback),
context, task_runner);
}
bool RTCCertificateGenerator::IsSupportedKeyParams(
const webrtc::KeyParams& key_params) {
return key_params.IsValid();
}
webrtc::scoped_refptr<webrtc::RTCCertificate> RTCCertificateGenerator::FromPEM(
String pem_private_key,
String pem_certificate) {
webrtc::scoped_refptr<webrtc::RTCCertificate> certificate =
webrtc::RTCCertificate::FromPEM(webrtc::RTCCertificatePEM(
pem_private_key.Utf8(), pem_certificate.Utf8()));
if (!certificate)
return nullptr;
return certificate;
}
} // namespace blink
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