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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/net/client_cert_store_kcer.h"
#include <algorithm>
#include <iterator>
#include <utility>
#include "ash/constants/ash_features.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/strings/stringprintf.h"
#include "base/task/thread_pool.h"
#include "base/threading/scoped_blocking_call.h"
#include "chrome/browser/ash/net/client_cert_filter.h"
#include "chrome/browser/certificate_provider/certificate_provider.h"
#include "chromeos/ash/components/kcer/client_cert_identity_kcer.h"
#include "chromeos/ash/components/kcer/kcer.h"
#include "net/base/features.h"
#include "net/ssl/client_cert_matcher.h"
#include "net/ssl/client_cert_store_nss.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/ssl/ssl_private_key.h"
namespace ash {
namespace {
net::ClientCertIdentityList FilterCertsOnWorkerThreadOld(
scoped_refptr<const net::SSLCertRequestInfo> request,
net::ClientCertIdentityList client_certs) {
net::ClientCertStoreNSS::FilterCertsOnWorkerThread(&client_certs, *request);
return client_certs;
}
net::ClientCertIdentityList FilterCertsOnWorkerThread(
scoped_refptr<const net::SSLCertRequestInfo> request,
net::ClientCertIdentityList client_certs,
net::ClientCertIssuerSourceCollection issuer_sources) {
net::FilterMatchingClientCertIdentities(&client_certs, *request,
issuer_sources);
return client_certs;
}
} // namespace
//==============================================================================
ClientCertStoreKcer::ClientCertStoreKcer(
std::unique_ptr<chromeos::CertificateProvider> cert_provider,
base::WeakPtr<kcer::Kcer> kcer,
net::ClientCertIssuerSourceGetter issuer_source_getter)
: cert_provider_(std::move(cert_provider)),
kcer_(std::move(kcer)),
issuer_source_getter_(std::move(issuer_source_getter)) {}
ClientCertStoreKcer::~ClientCertStoreKcer() = default;
void ClientCertStoreKcer::GetClientCerts(
scoped_refptr<const net::SSLCertRequestInfo> cert_request_info,
ClientCertListCallback callback) {
auto get_kcer_certs = base::BindOnce(
&ClientCertStoreKcer::GetKcerCerts, weak_factory_.GetWeakPtr(),
std::move(cert_request_info), std::move(callback));
if (cert_provider_) {
cert_provider_->GetCertificates(std::move(get_kcer_certs));
} else {
std::move(get_kcer_certs).Run(net::ClientCertIdentityList());
}
}
void ClientCertStoreKcer::GetKcerCerts(
scoped_refptr<const net::SSLCertRequestInfo> request,
ClientCertListCallback callback,
net::ClientCertIdentityList additional_certs) {
if (!kcer_) {
return GotAllClientCerts(std::move(request), std::move(callback),
std::move(additional_certs));
}
// Fetch all tokens that are available in the current context.
kcer_->GetAvailableTokens(base::BindOnce(
&ClientCertStoreKcer::GotKcerTokens, weak_factory_.GetWeakPtr(),
std::move(request), std::move(callback), std::move(additional_certs)));
}
void ClientCertStoreKcer::GotKcerTokens(
scoped_refptr<const net::SSLCertRequestInfo> request,
ClientCertListCallback callback,
net::ClientCertIdentityList additional_certs,
base::flat_set<kcer::Token> tokens) {
if (!kcer_) {
return GotAllClientCerts(std::move(request), std::move(callback),
std::move(additional_certs));
}
kcer_->ListCerts(
std::move(tokens),
base::BindOnce(&ClientCertStoreKcer::GotKcerCerts,
weak_factory_.GetWeakPtr(), std::move(request),
std::move(callback), std::move(additional_certs)));
}
void ClientCertStoreKcer::GotKcerCerts(
scoped_refptr<const net::SSLCertRequestInfo> request,
ClientCertListCallback callback,
net::ClientCertIdentityList additional_certs,
std::vector<scoped_refptr<const kcer::Cert>> kcer_certs,
base::flat_map<kcer::Token, kcer::Error> kcer_errors) {
if (!kcer_) {
return GotAllClientCerts(std::move(request), std::move(callback),
std::move(additional_certs));
}
for (auto& [k, v] : kcer_errors) {
// Log errors, if any, and continue as usual with the remaining certs.
LOG(ERROR) << base::StringPrintf(
"Failed to get certs from token:%d, error:%d", static_cast<uint32_t>(k),
static_cast<uint32_t>(v));
}
additional_certs.reserve(additional_certs.size() + kcer_certs.size());
for (scoped_refptr<const kcer::Cert>& cert : kcer_certs) {
if (!cert || !cert->GetX509Cert()) {
// Probably shouldn't happen, but double check just in case.
continue;
}
additional_certs.push_back(
std::make_unique<kcer::ClientCertIdentityKcer>(kcer_, std::move(cert)));
}
return GotAllClientCerts(std::move(request), std::move(callback),
std::move(additional_certs));
}
void ClientCertStoreKcer::GotAllClientCerts(
scoped_refptr<const net::SSLCertRequestInfo> request,
ClientCertListCallback callback,
net::ClientCertIdentityList certs) {
if (base::FeatureList::IsEnabled(net::features::kNewClientCertPathBuilding)) {
// `GotAllCertsAndIssuers` may be called synchronously or asynchronously.
std::move(issuer_source_getter_)
.Run(base::BindOnce(&ClientCertStoreKcer::GotAllCertsAndIssuers,
weak_factory_.GetWeakPtr(), std::move(request),
std::move(callback), std::move(certs)));
} else {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE,
{base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
base::BindOnce(&FilterCertsOnWorkerThreadOld, std::move(request),
std::move(certs)),
base::BindOnce(&ClientCertStoreKcer::ReturnClientCerts,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
}
void ClientCertStoreKcer::GotAllCertsAndIssuers(
scoped_refptr<const net::SSLCertRequestInfo> request,
ClientCertListCallback callback,
net::ClientCertIdentityList certs,
net::ClientCertIssuerSourceCollection issuer_sources) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE,
{base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
base::BindOnce(&FilterCertsOnWorkerThread, std::move(request),
std::move(certs), std::move(issuer_sources)),
base::BindOnce(&ClientCertStoreKcer::ReturnClientCerts,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void ClientCertStoreKcer::ReturnClientCerts(
ClientCertListCallback callback,
net::ClientCertIdentityList identities) {
std::move(callback).Run(std::move(identities));
}
} // namespace ash
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