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// Copyright 2019 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/arc/enterprise/cert_store/arc_cert_installer.h"
#include <cert.h>
#include <utility>
#include <vector>
#include "base/base64.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "chrome/browser/ash/arc/enterprise/cert_store/arc_cert_installer_utils.h"
#include "chrome/browser/ash/policy/remote_commands/user_command_arc_job.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/net/x509_certificate_model_nss.h"
#include "chromeos/ash/services/keymanagement/public/mojom/cert_store_types.mojom.h"
#include "crypto/rsa_private_key.h"
#include "net/cert/x509_util_nss.h"
// Enable VLOG level 1.
#undef ENABLED_VLOG_LEVEL
#define ENABLED_VLOG_LEVEL 1
namespace arc {
CertDescription::CertDescription(crypto::RSAPrivateKey* placeholder_key,
CERTCertificate* nss_cert,
keymanagement::mojom::ChapsSlot slot,
std::string label,
std::string id)
: placeholder_key(placeholder_key),
nss_cert(nss_cert),
slot(slot),
label(label),
id(id) {}
CertDescription::CertDescription(CertDescription&& other) = default;
CertDescription& CertDescription::operator=(CertDescription&& other) = default;
CertDescription::~CertDescription() = default;
ArcCertInstaller::ArcCertInstaller(content::BrowserContext* context)
: ArcCertInstaller(Profile::FromBrowserContext(context),
std::make_unique<policy::RemoteCommandsQueue>()) {}
ArcCertInstaller::ArcCertInstaller(
Profile* profile,
std::unique_ptr<policy::RemoteCommandsQueue> queue)
: profile_(profile), queue_(std::move(queue)), weak_ptr_factory_(this) {
VLOG(1) << "ArcCertInstaller::ArcCertInstaller";
queue_->AddObserver(this);
}
ArcCertInstaller::~ArcCertInstaller() {
VLOG(1) << "ArcCertInstaller::~ArcCertInstaller";
queue_->RemoveObserver(this);
}
std::map<std::string, std::string> ArcCertInstaller::InstallArcCerts(
std::vector<CertDescription> certificates,
InstallArcCertsCallback callback) {
VLOG(1) << "ArcCertInstaller::InstallArcCerts";
if (callback_) {
LOG(WARNING) << "The last ARC cert installation has not finished before "
<< "starting a new one.";
std::move(callback_).Run(false /* result */);
pending_status_ = true;
}
// Map the certificate name to the dummy RSA SPKI.
std::map<std::string, std::string> required_cert_names;
callback_ = std::move(callback);
for (const auto& certificate : certificates) {
const net::ScopedCERTCertificate& nss_cert = certificate.nss_cert;
if (!nss_cert) {
LOG(ERROR)
<< "An invalid certificate has been passed to ArcCertInstaller";
continue;
}
std::string cert_name =
x509_certificate_model::GetCertNameOrNickname(nss_cert.get());
required_cert_names[cert_name] = InstallArcCert(cert_name, certificate);
}
// Cleanup |known_cert_names_| according to |required_cert_names|.
for (auto it = known_cert_names_.begin(); it != known_cert_names_.end();) {
auto cert_name = it++;
if (!required_cert_names.count(*cert_name))
known_cert_names_.erase(cert_name);
}
if (pending_commands_.empty() && callback_) {
std::move(callback_).Run(pending_status_);
pending_status_ = true;
}
return required_cert_names;
}
std::string ArcCertInstaller::InstallArcCert(
const std::string& name,
const CertDescription& certificate) {
VLOG(1) << "ArcCertInstaller::InstallArcCert " << name;
// Do not install certificate if it is already installed or pending.
if (known_cert_names_.count(name)) {
VLOG(1) << "Certificate " << name << " is already installed or pending";
return "";
}
std::string der_cert;
if (!net::x509_util::GetDEREncoded(certificate.nss_cert.get(), &der_cert)) {
LOG(ERROR) << "Certificate encoding error: " << name;
return "";
}
known_cert_names_.insert(name);
// Install certificate.
std::unique_ptr<policy::RemoteCommandJob> job =
std::make_unique<policy::UserCommandArcJob>(profile_);
enterprise_management::RemoteCommand command_proto;
command_proto.set_type(
enterprise_management::RemoteCommand_Type_USER_ARC_COMMAND);
command_proto.set_command_id(next_id_);
command_proto.set_age_of_command(0);
std::string der_cert64 = base::Base64Encode(der_cert);
crypto::RSAPrivateKey* rsa = certificate.placeholder_key.get();
std::string pkcs12 = CreatePkcs12ForKey(name, rsa->key());
// NOTE: command_proto contains crypto key value. Avoid logging its value out
// on release build, by using LOG instead of SYSLOG.
command_proto.set_payload(
base::StringPrintf("{\"type\":\"INSTALL_KEY_PAIR\","
"\"payload\":\"{"
"\\\"key\\\":\\\"%s\\\","
"\\\"alias\\\":\\\"%s\\\","
"\\\"certs\\\":[\\\"%s\\\"],"
"\\\"is_user_selectable\\\":false"
"}\"}",
pkcs12.c_str(), name.c_str(), der_cert64.c_str()));
LOG(INFO) << "Attempting to install a key pair via remote command.";
if (!job || !job->Init(queue_->GetNowTicks(), command_proto,
enterprise_management::SignedData())) {
LOG(ERROR) << "Initialization of remote command failed";
known_cert_names_.erase(name);
return "";
} else {
pending_commands_[next_id_++] = name;
queue_->AddJob(std::move(job));
return ExportSpki(rsa);
}
}
void ArcCertInstaller::OnJobFinished(policy::RemoteCommandJob* command) {
VLOG(1) << "ArcCertInstaller::OnJobFinished";
if (!pending_commands_.count(command->unique_id())) {
LOG(ERROR) << "Received invalid ARC remote command with unrecognized "
<< "unique_id = " << command->unique_id();
return;
}
// If the cert installation is failed, save the status and remove from the
// |known_cert_names_|. Use the |pending_status_| to notify clients should
// re-try installation.
if (command->status() != policy::RemoteCommandJob::Status::SUCCEEDED) {
LOG(ERROR) << "Failed to install certificate "
<< pending_commands_[command->unique_id()];
if (known_cert_names_.count(pending_commands_[command->unique_id()])) {
known_cert_names_.erase(pending_commands_[command->unique_id()]);
pending_status_ = false;
}
}
pending_commands_.erase(command->unique_id());
if (pending_commands_.empty() && callback_) {
std::move(callback_).Run(pending_status_);
pending_status_ = true;
}
}
} // namespace arc
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