1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chromeos/cert_loader.h"
10 #include "base/location.h"
11 #include "base/message_loop/message_loop_proxy.h"
12 #include "base/strings/string_number_conversions.h"
13 #include "base/task_runner_util.h"
14 #include "base/threading/worker_pool.h"
15 #include "crypto/nss_util.h"
16 #include "crypto/scoped_nss_types.h"
17 #include "net/cert/nss_cert_database.h"
18 #include "net/cert/nss_cert_database_chromeos.h"
19 #include "net/cert/x509_certificate.h"
23 static CertLoader* g_cert_loader = NULL;
26 void CertLoader::Initialize() {
27 CHECK(!g_cert_loader);
28 g_cert_loader = new CertLoader();
32 void CertLoader::Shutdown() {
39 CertLoader* CertLoader::Get() {
40 CHECK(g_cert_loader) << "CertLoader::Get() called before Initialize()";
45 bool CertLoader::IsInitialized() {
49 CertLoader::CertLoader()
50 : certificates_loaded_(false),
51 certificates_update_required_(false),
52 certificates_update_running_(false),
54 force_hardware_backed_for_test_(false),
55 cert_list_(new net::CertificateList),
59 CertLoader::~CertLoader() {
60 net::CertDatabase::GetInstance()->RemoveObserver(this);
63 void CertLoader::StartWithNSSDB(net::NSSCertDatabase* database) {
67 // Start observing cert database for changes.
68 // Observing net::CertDatabase is preferred over observing |database_|
69 // directly, as |database_| observers receive only events generated directly
70 // by |database_|, so they may miss a few relevant ones.
71 // TODO(tbarzic): Once singleton NSSCertDatabase is removed, investigate if
72 // it would be OK to observe |database_| directly; or change NSSCertDatabase
73 // to send notification on all relevant changes.
74 net::CertDatabase::GetInstance()->AddObserver(this);
79 void CertLoader::AddObserver(CertLoader::Observer* observer) {
80 observers_.AddObserver(observer);
83 void CertLoader::RemoveObserver(CertLoader::Observer* observer) {
84 observers_.RemoveObserver(observer);
87 int CertLoader::TPMTokenSlotID() const {
90 crypto::ScopedPK11Slot slot(database_->GetPrivateSlot());
93 return static_cast<int>(PK11_GetSlotID(slot.get()));
96 bool CertLoader::IsHardwareBacked() const {
97 if (force_hardware_backed_for_test_)
101 crypto::ScopedPK11Slot slot(database_->GetPrivateSlot());
104 return PK11_IsHW(slot.get());
107 bool CertLoader::IsCertificateHardwareBacked(
108 const net::X509Certificate* cert) const {
111 return database_->IsHardwareBacked(cert);
114 bool CertLoader::CertificatesLoading() const {
115 return database_ && !certificates_loaded_;
118 // This is copied from chrome/common/net/x509_certificate_model_nss.cc.
119 // For background see this discussion on dev-tech-crypto.lists.mozilla.org:
120 // http://web.archiveorange.com/archive/v/6JJW7E40sypfZGtbkzxX
122 // NOTE: This function relies on the convention that the same PKCS#11 ID
123 // is shared between a certificate and its associated private and public
124 // keys. I tried to implement this with PK11_GetLowLevelKeyIDForCert(),
125 // but that always returns NULL on Chrome OS for me.
128 std::string CertLoader::GetPkcs11IdForCert(const net::X509Certificate& cert) {
129 CERTCertificateStr* cert_handle = cert.os_cert_handle();
130 SECKEYPrivateKey *priv_key =
131 PK11_FindKeyByAnyCert(cert_handle, NULL /* wincx */);
133 return std::string();
135 // Get the CKA_ID attribute for a key.
136 SECItem* sec_item = PK11_GetLowLevelKeyIDForPrivateKey(priv_key);
137 std::string pkcs11_id;
139 pkcs11_id = base::HexEncode(sec_item->data, sec_item->len);
140 SECITEM_FreeItem(sec_item, PR_TRUE);
142 SECKEY_DestroyPrivateKey(priv_key);
147 void CertLoader::LoadCertificates() {
148 CHECK(thread_checker_.CalledOnValidThread());
149 VLOG(1) << "LoadCertificates: " << certificates_update_running_;
151 if (certificates_update_running_) {
152 certificates_update_required_ = true;
156 certificates_update_running_ = true;
157 certificates_update_required_ = false;
159 database_->ListCerts(
160 base::Bind(&CertLoader::UpdateCertificates, weak_factory_.GetWeakPtr()));
163 void CertLoader::UpdateCertificates(
164 scoped_ptr<net::CertificateList> cert_list) {
165 CHECK(thread_checker_.CalledOnValidThread());
166 DCHECK(certificates_update_running_);
167 VLOG(1) << "UpdateCertificates: " << cert_list->size();
169 // Ignore any existing certificates.
170 cert_list_ = cert_list.Pass();
172 bool initial_load = !certificates_loaded_;
173 certificates_loaded_ = true;
174 NotifyCertificatesLoaded(initial_load);
176 certificates_update_running_ = false;
177 if (certificates_update_required_)
181 void CertLoader::NotifyCertificatesLoaded(bool initial_load) {
182 FOR_EACH_OBSERVER(Observer, observers_,
183 OnCertificatesLoaded(*cert_list_, initial_load));
186 void CertLoader::OnCACertChanged(const net::X509Certificate* cert) {
187 // This is triggered when a CA certificate is modified.
188 VLOG(1) << "OnCACertChanged";
192 void CertLoader::OnCertAdded(const net::X509Certificate* cert) {
193 // This is triggered when a client certificate is added.
194 VLOG(1) << "OnCertAdded";
198 void CertLoader::OnCertRemoved(const net::X509Certificate* cert) {
199 VLOG(1) << "OnCertRemoved";
203 } // namespace chromeos