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// Copyright (c) 2012 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 "net/cert/cert_database.h"
#include <cert.h>
#include <pk11pub.h>
#include <secmod.h>
#include "base/logging.h"
#include "base/observer_list_threadsafe.h"
#include "crypto/nss_util.h"
#include "crypto/scoped_nss_types.h"
#include "net/base/net_errors.h"
#include "net/cert/nss_cert_database.h"
#include "net/cert/x509_certificate.h"
#include "net/cert/x509_util_nss.h"
namespace net {
// Helper that observes events from the NSSCertDatabase and forwards them to
// the given CertDatabase.
class CertDatabase::Notifier : public NSSCertDatabase::Observer {
public:
explicit Notifier(CertDatabase* cert_db) : cert_db_(cert_db) {
NSSCertDatabase::GetInstance()->AddObserver(this);
}
virtual ~Notifier() {
NSSCertDatabase::GetInstance()->RemoveObserver(this);
}
// NSSCertDatabase::Observer implementation:
virtual void OnCertAdded(const X509Certificate* cert) OVERRIDE {
cert_db_->NotifyObserversOfCertAdded(cert);
}
virtual void OnCertRemoved(const X509Certificate* cert) OVERRIDE {
cert_db_->NotifyObserversOfCertRemoved(cert);
}
virtual void OnCertTrustChanged(const X509Certificate* cert) OVERRIDE {
cert_db_->NotifyObserversOfCertTrustChanged(cert);
}
private:
CertDatabase* cert_db_;
DISALLOW_COPY_AND_ASSIGN(Notifier);
};
CertDatabase::CertDatabase()
: observer_list_(new ObserverListThreadSafe<Observer>) {
// Observe NSSCertDatabase events and forward them to observers of
// CertDatabase. This also makes sure that NSS has been initialized.
notifier_.reset(new Notifier(this));
}
CertDatabase::~CertDatabase() {}
int CertDatabase::CheckUserCert(X509Certificate* cert_obj) {
if (!cert_obj)
return ERR_CERT_INVALID;
if (cert_obj->HasExpired())
return ERR_CERT_DATE_INVALID;
// Check if the private key corresponding to the certificate exist
// We shouldn't accept any random client certificate sent by a CA.
// Note: The NSS source documentation wrongly suggests that this
// also imports the certificate if the private key exists. This
// doesn't seem to be the case.
CERTCertificate* cert = cert_obj->os_cert_handle();
PK11SlotInfo* slot = PK11_KeyForCertExists(cert, NULL, NULL);
if (!slot)
return ERR_NO_PRIVATE_KEY_FOR_CERT;
PK11_FreeSlot(slot);
return OK;
}
int CertDatabase::AddUserCert(X509Certificate* cert_obj) {
CERTCertificate* cert = cert_obj->os_cert_handle();
CK_OBJECT_HANDLE key;
crypto::ScopedPK11Slot slot(PK11_KeyForCertExists(cert, &key, NULL));
if (!slot.get())
return ERR_NO_PRIVATE_KEY_FOR_CERT;
std::string nickname = x509_util::GetUniqueNicknameForSlot(
cert_obj->GetDefaultNickname(USER_CERT),
&cert->derSubject,
slot.get());
SECStatus rv;
{
crypto::AutoNSSWriteLock lock;
rv = PK11_ImportCert(slot.get(), cert, key, nickname.c_str(), PR_FALSE);
}
if (rv != SECSuccess) {
LOG(ERROR) << "Couldn't import user certificate. " << PORT_GetError();
return ERR_ADD_USER_CERT_FAILED;
}
NotifyObserversOfCertAdded(cert_obj);
return OK;
}
} // namespace net
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