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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.
#include "chrome/browser/cert_store.h"
#include <algorithm>
#include <functional>
#include "chrome/browser/render_view_host.h"
#include "chrome/browser/web_contents.h"
#include "chrome/common/stl_util-inl.h"
template <typename T>
struct MatchSecond {
MatchSecond(const T& t) : value(t) {}
template<typename Pair>
bool operator()(const Pair& p) const {
return (value == p.second);
}
T value;
};
// static
CertStore* CertStore::instance_ = NULL;
// static
void CertStore::Initialize() {
DCHECK(!instance_);
instance_ = new CertStore();
}
// static
CertStore* CertStore::GetSharedInstance() {
DCHECK(instance_);
return instance_;
}
CertStore::CertStore() : next_cert_id_(1) {
// We watch for RenderProcess termination, as this is how we clear
// certificates for now.
// TODO (jcampan): we should be listening to events such as resource cached/
// removed from cache, and remove the cert when we know it
// is not used anymore.
// TODO(tc): This notification observer never gets removed because the
// CertStore is never deleted.
NotificationService::current()->AddObserver(this,
NOTIFY_RENDERER_PROCESS_TERMINATED, NotificationService::AllSources());
}
CertStore::~CertStore() {
NotificationService::current()->RemoveObserver(this,
NOTIFY_RENDERER_PROCESS_TERMINATED, NotificationService::AllSources());
}
int CertStore::StoreCert(X509Certificate* cert, int process_id) {
DCHECK(cert);
AutoLock autoLock(cert_lock_);
int cert_id;
// Do we already know this cert?
ReverseCertMap::iterator cert_iter = cert_to_id_.find(cert);
if (cert_iter == cert_to_id_.end()) {
cert_id = next_cert_id_++;
cert->AddRef();
id_to_cert_[cert_id] = cert;
cert_to_id_[cert] = cert_id;
} else {
cert_id = cert_iter->second;
}
// Let's update process_id_to_cert_id_.
if (std::find_if(process_id_to_cert_id_.lower_bound(process_id),
process_id_to_cert_id_.upper_bound(process_id),
MatchSecond<int>(cert_id)) ==
process_id_to_cert_id_.upper_bound(process_id)) {
process_id_to_cert_id_.insert(std::make_pair(process_id, cert_id));
}
// And cert_id_to_process_id_.
if (std::find_if(cert_id_to_process_id_.lower_bound(cert_id),
cert_id_to_process_id_.upper_bound(cert_id),
MatchSecond<int>(process_id)) ==
cert_id_to_process_id_.upper_bound(cert_id)) {
cert_id_to_process_id_.insert(std::make_pair(cert_id, process_id));
}
return cert_id;
}
bool CertStore::RetrieveCert(int cert_id,
scoped_refptr<X509Certificate>* cert) {
AutoLock autoLock(cert_lock_);
CertMap::iterator iter = id_to_cert_.find(cert_id);
if (iter == id_to_cert_.end())
return false;
*cert = iter->second;
return true;
}
void CertStore::RemoveCert(int cert_id) {
AutoLock autoLock(cert_lock_);
CertMap::iterator cert_iter = id_to_cert_.find(cert_id);
DCHECK(cert_iter != id_to_cert_.end());
ReverseCertMap::iterator id_iter = cert_to_id_.find(cert_iter->second);
DCHECK(id_iter != cert_to_id_.end());
cert_to_id_.erase(id_iter);
cert_iter->second->Release();
id_to_cert_.erase(cert_iter);
}
void CertStore::RemoveCertsForRenderProcesHost(int process_id) {
AutoLock autoLock(cert_lock_);
// We iterate through all the cert ids for that process.
IDMap::iterator ids_iter;
for (ids_iter = process_id_to_cert_id_.lower_bound(process_id);
ids_iter != process_id_to_cert_id_.upper_bound(process_id);) {
int cert_id = ids_iter->second;
// Remove this process from cert_id_to_process_id_.
IDMap::iterator proc_iter =
std::find_if(cert_id_to_process_id_.lower_bound(cert_id),
cert_id_to_process_id_.upper_bound(cert_id),
MatchSecond<int>(process_id));
DCHECK(proc_iter != cert_id_to_process_id_.upper_bound(cert_id));
cert_id_to_process_id_.erase(proc_iter);
if (cert_id_to_process_id_.count(cert_id) == 0) {
// This cert is not referenced by any process, remove it from id_to_cert_
// and cert_to_id_.
RemoveCert(cert_id);
}
// Erase the current item but keep the iterator valid.
process_id_to_cert_id_.erase(ids_iter++);
}
}
void CertStore::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(type == NOTIFY_RENDERER_PROCESS_TERMINATED);
RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
DCHECK(rph);
RemoveCertsForRenderProcesHost(rph->host_id());
}
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