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// Copyright 2020 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/cert_provisioning/cert_provisioning_platform_keys_helpers.h"
#include <memory>
#include <optional>
#include "base/check.h"
#include "base/containers/contains.h"
#include "base/containers/flat_set.h"
#include "base/functional/bind.h"
#include "chrome/browser/ash/cert_provisioning/cert_provisioning_common.h"
#include "chrome/browser/ash/platform_keys/platform_keys_service.h"
#include "chrome/browser/chromeos/platform_keys/platform_keys.h"
namespace ash::cert_provisioning {
namespace {
std::string BytesToStr(const std::vector<uint8_t>& val) {
return std::string(val.begin(), val.end());
}
} // namespace
// ========= CertIterator ======================================================
CertIterator::CertIterator(
CertScope cert_scope,
platform_keys::PlatformKeysService* platform_keys_service)
: cert_scope_(cert_scope), platform_keys_service_(platform_keys_service) {}
CertIterator::~CertIterator() = default;
void CertIterator::IterateAll(
CertIteratorForEachCallback for_each_callback,
CertIteratorOnFinishedCallback on_finished_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
Cancel();
for_each_callback_ = std::move(for_each_callback);
on_finished_callback_ = std::move(on_finished_callback);
platform_keys_service_->GetCertificates(
GetPlatformKeysTokenId(cert_scope_),
base::BindRepeating(&CertIterator::OnGetCertificatesDone,
weak_factory_.GetWeakPtr()));
}
void CertIterator::Cancel() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
weak_factory_.InvalidateWeakPtrs();
for_each_callback_.Reset();
on_finished_callback_.Reset();
}
void CertIterator::OnGetCertificatesDone(
std::unique_ptr<net::CertificateList> existing_certs,
chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (status != chromeos::platform_keys::Status::kSuccess) {
StopIteration(status);
return;
}
// No work to do, return empty error message.
if (!existing_certs || existing_certs->empty()) {
StopIteration(status);
return;
}
wait_counter_ = existing_certs->size();
for (const auto& cert : *existing_certs) {
std::vector<uint8_t> public_key =
chromeos::platform_keys::GetSubjectPublicKeyInfoBlob(cert);
platform_keys_service_->GetAttributeForKey(
GetPlatformKeysTokenId(cert_scope_), public_key,
chromeos::platform_keys::KeyAttributeType::kCertificateProvisioningId,
base::BindOnce(&CertIterator::OnGetAttributeForKeyDone,
weak_factory_.GetWeakPtr(), cert));
}
}
void CertIterator::OnGetAttributeForKeyDone(
scoped_refptr<net::X509Certificate> cert,
std::optional<std::vector<uint8_t>> attr_value,
chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(wait_counter_ > 0);
// TODO(crbug.com/40127595): Currently if GetAttributeForKey fails to get the
// attribute (because it was not set or any other reason), it will return
// nullopt for cert_profile_id and empty error message. When
// PlatformKeysService switches to error codes, a code for such situation
// should not be returned via callback and cert collection can be continued.
if (status != chromeos::platform_keys::Status::kSuccess) {
StopIteration(status);
return;
}
if (attr_value) {
for_each_callback_.Run(cert, BytesToStr(attr_value.value()),
chromeos::platform_keys::Status::kSuccess);
}
--wait_counter_;
if (wait_counter_ == 0) {
StopIteration(chromeos::platform_keys::Status::kSuccess);
}
}
void CertIterator::StopIteration(chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!on_finished_callback_.is_null());
weak_factory_.InvalidateWeakPtrs();
std::move(on_finished_callback_).Run(status);
}
// ========= LatestCertsWithIdsGetter ==========================================
LatestCertsWithIdsGetter::LatestCertsWithIdsGetter(
CertScope cert_scope,
platform_keys::PlatformKeysService* platform_keys_service)
: iterator_(cert_scope, platform_keys_service) {}
LatestCertsWithIdsGetter::~LatestCertsWithIdsGetter() = default;
void LatestCertsWithIdsGetter::GetCertsWithIds(
LatestCertsWithIdsGetterCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
Cancel();
callback_ = std::move(callback);
iterator_.IterateAll(
base::BindRepeating(&LatestCertsWithIdsGetter::ProcessOneCert,
weak_factory_.GetWeakPtr()),
base::BindOnce(&LatestCertsWithIdsGetter::OnIterationFinished,
weak_factory_.GetWeakPtr()));
}
void LatestCertsWithIdsGetter::Cancel() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
weak_factory_.InvalidateWeakPtrs();
callback_.Reset();
}
bool LatestCertsWithIdsGetter::IsRunning() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return !callback_.is_null();
}
void LatestCertsWithIdsGetter::ProcessOneCert(
scoped_refptr<net::X509Certificate> new_cert,
const CertProfileId& cert_profile_id,
chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (status != chromeos::platform_keys::Status::kSuccess) {
OnIterationFinished(status);
return;
}
auto cert_iter = certs_with_ids_.find(cert_profile_id);
if (cert_iter == certs_with_ids_.end()) {
certs_with_ids_[cert_profile_id] = new_cert;
return;
}
const auto& existing_cert = cert_iter->second;
if (existing_cert->valid_expiry() < new_cert->valid_expiry()) {
cert_iter->second = new_cert;
return;
}
}
void LatestCertsWithIdsGetter::OnIterationFinished(
chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!callback_.is_null());
weak_factory_.InvalidateWeakPtrs();
if (status != chromeos::platform_keys::Status::kSuccess) {
certs_with_ids_ = {};
}
std::move(callback_).Run(std::move(certs_with_ids_), status);
}
// ========= CertDeleter =======================================================
CertDeleter::CertDeleter(
CertScope cert_scope,
platform_keys::PlatformKeysService* platform_keys_service)
: cert_scope_(cert_scope),
platform_keys_service_(platform_keys_service),
iterator_(cert_scope, platform_keys_service) {}
CertDeleter::~CertDeleter() = default;
void CertDeleter::DeleteCerts(
base::flat_set<CertProfileId> cert_profile_ids_to_keep,
CertDeleterCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
Cancel();
callback_ = std::move(callback);
cert_profile_ids_to_keep_ = std::move(cert_profile_ids_to_keep);
iterator_.IterateAll(base::BindRepeating(&CertDeleter::ProcessOneCert,
weak_factory_.GetWeakPtr()),
base::BindOnce(&CertDeleter::OnIterationFinished,
weak_factory_.GetWeakPtr()));
}
void CertDeleter::Cancel() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
weak_factory_.InvalidateWeakPtrs();
iteration_finished_ = false;
pending_delete_tasks_counter_ = 0;
callback_.Reset();
certs_with_ids_.clear();
}
void CertDeleter::ProcessOneCert(scoped_refptr<net::X509Certificate> cert,
const CertProfileId& cert_profile_id,
chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (status != chromeos::platform_keys::Status::kSuccess) {
ReturnStatus(status);
return;
}
RememberOrDelete(cert, cert_profile_id);
}
void CertDeleter::RememberOrDelete(scoped_refptr<net::X509Certificate> new_cert,
const CertProfileId& cert_profile_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if ((!base::Contains(cert_profile_ids_to_keep_, cert_profile_id)) ||
(base::Time::Now() > new_cert->valid_expiry())) {
DeleteCert(new_cert);
return;
}
auto cert_iter = certs_with_ids_.find(cert_profile_id);
if (cert_iter == certs_with_ids_.end()) {
certs_with_ids_[cert_profile_id] = new_cert;
return;
}
// Keep only the newest certificate.
const auto& existing_cert = cert_iter->second;
if (existing_cert->valid_expiry() < new_cert->valid_expiry()) {
DeleteCert(existing_cert);
cert_iter->second = new_cert;
return;
} else {
DeleteCert(new_cert);
return;
}
}
void CertDeleter::DeleteCert(scoped_refptr<net::X509Certificate> cert) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
++pending_delete_tasks_counter_;
platform_keys_service_->RemoveCertificate(
GetPlatformKeysTokenId(cert_scope_), cert,
base::BindRepeating(&CertDeleter::OnDeleteCertDone,
weak_factory_.GetWeakPtr()));
}
void CertDeleter::OnDeleteCertDone(chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(pending_delete_tasks_counter_ > 0);
if (status != chromeos::platform_keys::Status::kSuccess) {
ReturnStatus(status);
return;
}
--pending_delete_tasks_counter_;
CheckStateAndMaybeFinish();
}
void CertDeleter::OnIterationFinished(chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
iteration_finished_ = true;
CheckStateAndMaybeFinish();
}
void CertDeleter::CheckStateAndMaybeFinish() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!iteration_finished_ || (pending_delete_tasks_counter_ > 0)) {
return;
}
ReturnStatus(chromeos::platform_keys::Status::kSuccess);
}
void CertDeleter::ReturnStatus(chromeos::platform_keys::Status status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!callback_.is_null());
weak_factory_.InvalidateWeakPtrs();
std::move(callback_).Run(status);
}
} // namespace ash::cert_provisioning
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