| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "services/network/crl_set_distributor.h" |
| |
| #include <string> |
| |
| #include "base/bind.h" |
| #include "base/containers/span.h" |
| #include "base/location.h" |
| #include "base/strings/string_piece.h" |
| #include "base/task/post_task.h" |
| |
| namespace network { |
| |
| namespace { |
| |
| // Attempts to parse |crl_set|, returning nullptr on error or the parsed |
| // CRLSet. |
| scoped_refptr<net::CRLSet> ParseCRLSet(std::string crl_set) { |
| scoped_refptr<net::CRLSet> result; |
| if (!net::CRLSet::Parse(crl_set, &result)) |
| return nullptr; |
| return result; |
| } |
| |
| } // namespace |
| |
| CRLSetDistributor::CRLSetDistributor() : weak_factory_(this) {} |
| |
| CRLSetDistributor::~CRLSetDistributor() = default; |
| |
| void CRLSetDistributor::AddObserver(Observer* observer) { |
| observers_.AddObserver(observer); |
| } |
| |
| void CRLSetDistributor::RemoveObserver(Observer* observer) { |
| observers_.RemoveObserver(observer); |
| } |
| |
| void CRLSetDistributor::OnNewCRLSet(base::span<const uint8_t> crl_set) { |
| // Make a copy for the background task, since the underlying storage for |
| // the span will go away. |
| std::string crl_set_string(reinterpret_cast<const char*>(crl_set.data()), |
| crl_set.size()); |
| |
| base::PostTaskWithTraitsAndReplyWithResult( |
| FROM_HERE, {base::TaskPriority::BEST_EFFORT}, |
| base::BindOnce(&ParseCRLSet, std::move(crl_set_string)), |
| base::BindOnce(&CRLSetDistributor::OnCRLSetParsed, |
| weak_factory_.GetWeakPtr())); |
| } |
| |
| void CRLSetDistributor::OnCRLSetParsed(scoped_refptr<net::CRLSet> crl_set) { |
| if (!crl_set) |
| return; // Error parsing |
| |
| if (crl_set_ && crl_set_->sequence() >= crl_set->sequence()) { |
| // Don't allow downgrades, and don't refresh CRLSets that are identical |
| // (the sequence is globally unique for all CRLSets). |
| return; |
| } |
| |
| crl_set_ = std::move(crl_set); |
| |
| for (auto& observer : observers_) { |
| observer.OnNewCRLSet(crl_set_); |
| } |
| } |
| |
| } // namespace network |