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/*
* Copyright 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_RTC_CERTIFICATE_GENERATOR_H_
#define RTC_BASE_RTC_CERTIFICATE_GENERATOR_H_
#include <stdint.h>
#include "absl/functional/any_invocable.h"
#include "absl/types/optional.h"
#include "api/scoped_refptr.h"
#include "rtc_base/rtc_certificate.h"
#include "rtc_base/ssl_identity.h"
#include "rtc_base/system/rtc_export.h"
#include "rtc_base/thread.h"
namespace rtc {
// Generates `RTCCertificate`s.
// See `RTCCertificateGenerator` for the WebRTC repo's implementation.
class RTCCertificateGeneratorInterface {
public:
// Functor that will be called when certificate is generated asynchroniosly.
// Called with nullptr as the parameter on failure.
using Callback = absl::AnyInvocable<void(scoped_refptr<RTCCertificate>) &&>;
virtual ~RTCCertificateGeneratorInterface() = default;
// Generates a certificate asynchronously on the worker thread.
// Must be called on the signaling thread. The `callback` is invoked with the
// result on the signaling thread. `exipres_ms` optionally specifies for how
// long we want the certificate to be valid, but the implementation may choose
// its own restrictions on the expiration time.
virtual void GenerateCertificateAsync(
const KeyParams& key_params,
const absl::optional<uint64_t>& expires_ms,
Callback callback) = 0;
};
// Standard implementation of `RTCCertificateGeneratorInterface`.
// The static function `GenerateCertificate` generates a certificate on the
// current thread. The `RTCCertificateGenerator` instance generates certificates
// asynchronously on the worker thread with `GenerateCertificateAsync`.
class RTC_EXPORT RTCCertificateGenerator
: public RTCCertificateGeneratorInterface {
public:
// Generates a certificate on the current thread. Returns null on failure.
// If `expires_ms` is specified, the certificate will expire in approximately
// that many milliseconds from now. `expires_ms` is limited to a year, a
// larger value than that is clamped down to a year. If `expires_ms` is not
// specified, a default expiration time is used.
static scoped_refptr<RTCCertificate> GenerateCertificate(
const KeyParams& key_params,
const absl::optional<uint64_t>& expires_ms);
RTCCertificateGenerator(Thread* signaling_thread, Thread* worker_thread);
~RTCCertificateGenerator() override {}
// `RTCCertificateGeneratorInterface` overrides.
// If `expires_ms` is specified, the certificate will expire in approximately
// that many milliseconds from now. `expires_ms` is limited to a year, a
// larger value than that is clamped down to a year. If `expires_ms` is not
// specified, a default expiration time is used.
void GenerateCertificateAsync(const KeyParams& key_params,
const absl::optional<uint64_t>& expires_ms,
Callback callback) override;
private:
Thread* const signaling_thread_;
Thread* const worker_thread_;
};
} // namespace rtc
#endif // RTC_BASE_RTC_CERTIFICATE_GENERATOR_H_
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