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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_BROWSER_CERT_STORE_H_
#define CHROME_BROWSER_CERT_STORE_H_
#include <vector>
#include <map>
#include "base/lock.h"
#include "chrome/common/notification_service.h"
#include "net/base/x509_certificate.h"
// The purpose of the cert store is to provide an easy way to store/retrieve
// X509Certificate objects. When stored, an X509Certificate object is
// associated with a RenderProcessHost. If all the RenderProcessHosts
// associated with the cert have exited, the cert is removed from the store.
// This class is used by the SSLManager to keep track of the certs associated
// to loaded resources.
// It can be accessed from the UI and IO threads (it is thread-safe).
// Note that the cert ids will overflow if we register more than 2^32 - 1 certs
// in 1 browsing session (which is highly unlikely to happen).
class CertStore : public NotificationObserver {
public:
// Creates the singleton instance. Should be called from the UI thread.
static void Initialize();
// Returns the singleton instance of the CertStore.
static CertStore* GetSharedInstance();
// Stores the specified cert and returns the id associated with it. The cert
// is associated to the specified RenderProcessHost.
// When all the RenderProcessHosts associated with a cert have exited, the
// cert is removed from the store.
// Note: ids starts at 1.
int StoreCert(net::X509Certificate* cert, int render_process_host_id);
// Retrieves the previously stored cert associated with the specified
// |cert_id| and set it in |cert|. Returns false if no cert was found for
// that id.
bool RetrieveCert(int cert_id, scoped_refptr<net::X509Certificate>* cert);
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
CertStore();
~CertStore();
// Remove the specified cert from id_to_cert_ and cert_to_id_.
void RemoveCert(int cert_id);
// Removes all the certs associated with the specified process from the store.
void RemoveCertsForRenderProcesHost(int render_process_host_id);
static CertStore* instance_;
typedef std::multimap<int, int> IDMap;
typedef std::map<int, scoped_refptr<net::X509Certificate>> CertMap;
typedef std::map<net::X509Certificate*, int, net::X509Certificate::LessThan>
ReverseCertMap;
IDMap process_id_to_cert_id_;
IDMap cert_id_to_process_id_;
CertMap id_to_cert_;
ReverseCertMap cert_to_id_;
int next_cert_id_;
// This lock protects: process_to_ids_, id_to_processes_, id_to_cert_ and
// cert_to_id_.
Lock cert_lock_;
DISALLOW_EVIL_CONSTRUCTORS(CertStore);
};
#endif // CHROME_BROWSER_CERT_STORE_H_
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