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// Copyright (c) 2010 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.
#ifndef CHROME_BROWSER_CERT_STORE_H_
#define CHROME_BROWSER_CERT_STORE_H_
#pragma once
#include <map>
#include "base/lock.h"
#include "base/singleton.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.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:
// 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);
// Tries to retrieve the previously stored cert associated with the specified
// |cert_id|. Returns whether the cert could be found, and, if |cert| is
// non-NULL, copies it in.
bool RetrieveCert(int cert_id, scoped_refptr<net::X509Certificate>* cert);
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
friend struct DefaultSingletonTraits<CertStore>;
CertStore();
~CertStore();
// Remove the specified cert from id_to_cert_ and cert_to_id_.
// NOTE: the caller (RemoveCertsForRenderProcesHost) must hold cert_lock_.
void RemoveCertInternal(int cert_id);
// Removes all the certs associated with the specified process from the store.
void RemoveCertsForRenderProcesHost(int render_process_host_id);
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;
NotificationRegistrar registrar_;
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_COPY_AND_ASSIGN(CertStore);
};
#endif // CHROME_BROWSER_CERT_STORE_H_
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