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165c618bb9
Using CRYPTO_BUFFERs instead of legacy X509 objects offers memory and security gains, and will provide binary size improvements as well once the default list of built-in certificates can be removed; the code dealing with them still depends on the X509 API. Implemented by splitting openssl_identity and openssl_certificate into BoringSSL and vanilla OpenSSL implementations. No-Try: True Bug: webrtc:11410 Change-Id: I86ddb361b94ad85b15ebb8743490de83632ca53f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/196941 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32818}
94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/*
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* Copyright 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/rtc_certificate_generator.h"
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#include <time.h>
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#include <algorithm>
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#include <memory>
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#include <utility>
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#include "rtc_base/checks.h"
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#include "rtc_base/location.h"
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#include "rtc_base/message_handler.h"
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#include "rtc_base/ref_counted_object.h"
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#include "rtc_base/ssl_identity.h"
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namespace rtc {
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namespace {
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// A certificates' subject and issuer name.
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const char kIdentityName[] = "WebRTC";
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const uint64_t kYearInSeconds = 365 * 24 * 60 * 60;
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} // namespace
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// static
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scoped_refptr<RTCCertificate> RTCCertificateGenerator::GenerateCertificate(
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const KeyParams& key_params,
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const absl::optional<uint64_t>& expires_ms) {
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if (!key_params.IsValid()) {
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return nullptr;
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}
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std::unique_ptr<SSLIdentity> identity;
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if (!expires_ms) {
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identity = SSLIdentity::Create(kIdentityName, key_params);
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} else {
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uint64_t expires_s = *expires_ms / 1000;
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// Limit the expiration time to something reasonable (a year). This was
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// somewhat arbitrarily chosen. It also ensures that the value is not too
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// large for the unspecified |time_t|.
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expires_s = std::min(expires_s, kYearInSeconds);
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// TODO(torbjorng): Stop using |time_t|, its type is unspecified. It it safe
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// to assume it can hold up to a year's worth of seconds (and more), but
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// |SSLIdentity::Create| should stop relying on |time_t|.
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// See bugs.webrtc.org/5720.
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time_t cert_lifetime_s = static_cast<time_t>(expires_s);
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identity = SSLIdentity::Create(kIdentityName, key_params, cert_lifetime_s);
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}
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if (!identity) {
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return nullptr;
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}
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return RTCCertificate::Create(std::move(identity));
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}
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RTCCertificateGenerator::RTCCertificateGenerator(Thread* signaling_thread,
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Thread* worker_thread)
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: signaling_thread_(signaling_thread), worker_thread_(worker_thread) {
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RTC_DCHECK(signaling_thread_);
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RTC_DCHECK(worker_thread_);
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}
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void RTCCertificateGenerator::GenerateCertificateAsync(
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const KeyParams& key_params,
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const absl::optional<uint64_t>& expires_ms,
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const scoped_refptr<RTCCertificateGeneratorCallback>& callback) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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RTC_DCHECK(callback);
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// Create a new |RTCCertificateGenerationTask| for this generation request. It
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// is reference counted and referenced by the message data, ensuring it lives
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// until the task has completed (independent of |RTCCertificateGenerator|).
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worker_thread_->PostTask(RTC_FROM_HERE, [key_params, expires_ms,
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signaling_thread = signaling_thread_,
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cb = callback]() {
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scoped_refptr<RTCCertificate> certificate =
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RTCCertificateGenerator::GenerateCertificate(key_params, expires_ms);
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signaling_thread->PostTask(
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RTC_FROM_HERE, [cert = std::move(certificate), cb = std::move(cb)]() {
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cert ? cb->OnSuccess(cert) : cb->OnFailure();
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});
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});
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}
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} // namespace rtc
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