1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// 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 "content/browser/cert_store_impl.h"
#include <algorithm>
#include <functional>
#include "base/bind.h"
#include "base/stl_util.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
template <typename T>
struct MatchSecond {
explicit MatchSecond(const T& t) : value(t) {}
template<typename Pair>
bool operator()(const Pair& p) const {
return (value == p.second);
}
T value;
};
namespace content {
// static
CertStore* CertStore::GetInstance() {
return CertStoreImpl::GetInstance();
}
// static
CertStoreImpl* CertStoreImpl::GetInstance() {
return Singleton<CertStoreImpl>::get();
}
CertStoreImpl::CertStoreImpl() : next_cert_id_(1) {
if (BrowserThread::CurrentlyOn(BrowserThread::UI)) {
RegisterForNotification();
} else {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&CertStoreImpl::RegisterForNotification,
base::Unretained(this)));
}
}
CertStoreImpl::~CertStoreImpl() {
}
void CertStoreImpl::RegisterForNotification() {
// 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.
registrar_.Add(this, NOTIFICATION_RENDERER_PROCESS_TERMINATED,
NotificationService::AllBrowserContextsAndSources());
registrar_.Add(this, NOTIFICATION_RENDERER_PROCESS_CLOSED,
NotificationService::AllBrowserContextsAndSources());
}
int CertStoreImpl::StoreCert(net::X509Certificate* cert, int process_id) {
DCHECK(cert);
base::AutoLock auto_lock(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_++;
// We use 0 as an invalid cert_id value. In the unlikely event that
// next_cert_id_ wraps around, we reset it to 1.
if (next_cert_id_ == 0)
next_cert_id_ = 1;
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_.
std::pair<IDMap::iterator, IDMap::iterator> process_ids =
process_id_to_cert_id_.equal_range(process_id);
if (std::find_if(process_ids.first, process_ids.second,
MatchSecond<int>(cert_id)) == process_ids.second) {
process_id_to_cert_id_.insert(std::make_pair(process_id, cert_id));
}
// And cert_id_to_process_id_.
std::pair<IDMap::iterator, IDMap::iterator> cert_ids =
cert_id_to_process_id_.equal_range(cert_id);
if (std::find_if(cert_ids.first, cert_ids.second,
MatchSecond<int>(process_id)) == cert_ids.second) {
cert_id_to_process_id_.insert(std::make_pair(cert_id, process_id));
}
return cert_id;
}
bool CertStoreImpl::RetrieveCert(int cert_id,
scoped_refptr<net::X509Certificate>* cert) {
base::AutoLock auto_lock(cert_lock_);
CertMap::iterator iter = id_to_cert_.find(cert_id);
if (iter == id_to_cert_.end())
return false;
if (cert)
*cert = iter->second;
return true;
}
void CertStoreImpl::RemoveCertInternal(int cert_id) {
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.get());
DCHECK(id_iter != cert_to_id_.end());
cert_to_id_.erase(id_iter);
cert_iter->second->Release();
id_to_cert_.erase(cert_iter);
}
void CertStoreImpl::RemoveCertsForRenderProcesHost(int process_id) {
base::AutoLock auto_lock(cert_lock_);
// We iterate through all the cert ids for that process.
std::pair<IDMap::iterator, IDMap::iterator> process_ids =
process_id_to_cert_id_.equal_range(process_id);
for (IDMap::iterator ids_iter = process_ids.first;
ids_iter != process_ids.second; ++ids_iter) {
int cert_id = ids_iter->second;
// Find all the processes referring to this cert id in
// cert_id_to_process_id_, then locate the process being removed within
// that range.
std::pair<IDMap::iterator, IDMap::iterator> cert_ids =
cert_id_to_process_id_.equal_range(cert_id);
IDMap::iterator proc_iter =
std::find_if(cert_ids.first, cert_ids.second,
MatchSecond<int>(process_id));
DCHECK(proc_iter != cert_ids.second);
// Before removing, determine if no other processes refer to the current
// cert id. If |proc_iter| (the current process) is the lower bound of
// processes containing the current cert id and if |next_proc_iter| is the
// upper bound (the first process that does not), then only one process,
// the one being removed, refers to the cert id.
IDMap::iterator next_proc_iter = proc_iter;
++next_proc_iter;
bool last_process_for_cert_id =
(proc_iter == cert_ids.first && next_proc_iter == cert_ids.second);
cert_id_to_process_id_.erase(proc_iter);
if (last_process_for_cert_id) {
// The current cert id is not referenced by any other processes, so
// remove it from id_to_cert_ and cert_to_id_.
RemoveCertInternal(cert_id);
}
}
if (process_ids.first != process_ids.second)
process_id_to_cert_id_.erase(process_ids.first, process_ids.second);
}
void CertStoreImpl::Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(type == NOTIFICATION_RENDERER_PROCESS_TERMINATED ||
type == NOTIFICATION_RENDERER_PROCESS_CLOSED);
RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
DCHECK(rph);
RemoveCertsForRenderProcesHost(rph->GetID());
}
} // namespace content
|
