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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// Copyright 2015 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/ssl/ssl_client_session_cache_openssl.h"
#include <openssl/ssl.h>
#include "base/strings/string_number_conversions.h"
#include "base/test/simple_test_clock.h"
#include "net/ssl/scoped_openssl_types.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
// Test basic insertion and lookup operations.
TEST(SSLClientSessionCacheOpenSSLTest, Basic) {
SSLClientSessionCacheOpenSSL::Config config;
SSLClientSessionCacheOpenSSL cache(config);
ScopedSSL_SESSION session1(SSL_SESSION_new());
ScopedSSL_SESSION session2(SSL_SESSION_new());
ScopedSSL_SESSION session3(SSL_SESSION_new());
EXPECT_EQ(1u, session1->references);
EXPECT_EQ(1u, session2->references);
EXPECT_EQ(1u, session3->references);
EXPECT_EQ(nullptr, cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(0u, cache.size());
cache.Insert("key1", session1.get());
EXPECT_EQ(session1.get(), cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(1u, cache.size());
cache.Insert("key2", session2.get());
EXPECT_EQ(session1.get(), cache.Lookup("key1").get());
EXPECT_EQ(session2.get(), cache.Lookup("key2").get());
EXPECT_EQ(2u, cache.size());
EXPECT_EQ(2u, session1->references);
EXPECT_EQ(2u, session2->references);
cache.Insert("key1", session3.get());
EXPECT_EQ(session3.get(), cache.Lookup("key1").get());
EXPECT_EQ(session2.get(), cache.Lookup("key2").get());
EXPECT_EQ(2u, cache.size());
EXPECT_EQ(1u, session1->references);
EXPECT_EQ(2u, session2->references);
EXPECT_EQ(2u, session3->references);
cache.Flush();
EXPECT_EQ(nullptr, cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(nullptr, cache.Lookup("key3").get());
EXPECT_EQ(0u, cache.size());
EXPECT_EQ(1u, session1->references);
EXPECT_EQ(1u, session2->references);
EXPECT_EQ(1u, session3->references);
}
// Test that a session may be inserted at two different keys. This should never
// be necessary, but the API doesn't prohibit it.
TEST(SSLClientSessionCacheOpenSSLTest, DoubleInsert) {
SSLClientSessionCacheOpenSSL::Config config;
SSLClientSessionCacheOpenSSL cache(config);
ScopedSSL_SESSION session(SSL_SESSION_new());
EXPECT_EQ(1u, session->references);
EXPECT_EQ(nullptr, cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(0u, cache.size());
cache.Insert("key1", session.get());
EXPECT_EQ(session.get(), cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(1u, cache.size());
EXPECT_EQ(2u, session->references);
cache.Insert("key2", session.get());
EXPECT_EQ(session.get(), cache.Lookup("key1").get());
EXPECT_EQ(session.get(), cache.Lookup("key2").get());
EXPECT_EQ(2u, cache.size());
EXPECT_EQ(3u, session->references);
cache.Flush();
EXPECT_EQ(nullptr, cache.Lookup("key1").get());
EXPECT_EQ(nullptr, cache.Lookup("key2").get());
EXPECT_EQ(0u, cache.size());
EXPECT_EQ(1u, session->references);
}
// Tests that the session cache's size is correctly bounded.
TEST(SSLClientSessionCacheOpenSSLTest, MaxEntries) {
SSLClientSessionCacheOpenSSL::Config config;
config.max_entries = 3;
SSLClientSessionCacheOpenSSL cache(config);
ScopedSSL_SESSION session1(SSL_SESSION_new());
ScopedSSL_SESSION session2(SSL_SESSION_new());
ScopedSSL_SESSION session3(SSL_SESSION_new());
ScopedSSL_SESSION session4(SSL_SESSION_new());
// Insert three entries.
cache.Insert("key1", session1.get());
cache.Insert("key2", session2.get());
cache.Insert("key3", session3.get());
EXPECT_EQ(session1.get(), cache.Lookup("key1").get());
EXPECT_EQ(session2.get(), cache.Lookup("key2").get());
EXPECT_EQ(session3.get(), cache.Lookup("key3").get());
EXPECT_EQ(3u, cache.size());
// On insertion of a fourth, the first is removed.
cache.Insert("key4", session4.get());
EXPECT_EQ(nullptr, cache.Lookup("key1").get());
EXPECT_EQ(session4.get(), cache.Lookup("key4").get());
EXPECT_EQ(session3.get(), cache.Lookup("key3").get());
EXPECT_EQ(session2.get(), cache.Lookup("key2").get());
EXPECT_EQ(3u, cache.size());
// Despite being newest, the next to be removed is session4 as it was accessed
// least. recently.
cache.Insert("key1", session1.get());
EXPECT_EQ(session1.get(), cache.Lookup("key1").get());
EXPECT_EQ(session2.get(), cache.Lookup("key2").get());
EXPECT_EQ(session3.get(), cache.Lookup("key3").get());
EXPECT_EQ(nullptr, cache.Lookup("key4").get());
EXPECT_EQ(3u, cache.size());
}
// Tests that session expiration works properly.
TEST(SSLClientSessionCacheOpenSSLTest, Expiration) {
const size_t kNumEntries = 20;
const size_t kExpirationCheckCount = 10;
const base::TimeDelta kTimeout = base::TimeDelta::FromSeconds(1000);
SSLClientSessionCacheOpenSSL::Config config;
config.expiration_check_count = kExpirationCheckCount;
config.timeout = kTimeout;
SSLClientSessionCacheOpenSSL cache(config);
base::SimpleTestClock* clock = new base::SimpleTestClock;
cache.SetClockForTesting(make_scoped_ptr(clock));
// Add |kNumEntries - 1| entries.
for (size_t i = 0; i < kNumEntries - 1; i++) {
ScopedSSL_SESSION session(SSL_SESSION_new());
cache.Insert(base::SizeTToString(i), session.get());
}
EXPECT_EQ(kNumEntries - 1, cache.size());
// Expire all the previous entries and insert one more entry.
clock->Advance(kTimeout * 2);
ScopedSSL_SESSION session(SSL_SESSION_new());
cache.Insert("key", session.get());
// All entries are still in the cache.
EXPECT_EQ(kNumEntries, cache.size());
// Perform one fewer lookup than needed to trigger the expiration check. This
// shall not expire any session.
for (size_t i = 0; i < kExpirationCheckCount - 1; i++)
cache.Lookup("key");
// All entries are still in the cache.
EXPECT_EQ(kNumEntries, cache.size());
// Perform one more lookup. This will expire all sessions but the last one.
cache.Lookup("key");
EXPECT_EQ(1u, cache.size());
EXPECT_EQ(session.get(), cache.Lookup("key").get());
for (size_t i = 0; i < kNumEntries - 1; i++) {
SCOPED_TRACE(i);
EXPECT_EQ(nullptr, cache.Lookup(base::SizeTToString(i)));
}
}
// Tests that Lookup performs an expiration check before returning a cached
// session.
TEST(SSLClientSessionCacheOpenSSLTest, LookupExpirationCheck) {
// kExpirationCheckCount is set to a suitably large number so the automated
// pruning never triggers.
const size_t kExpirationCheckCount = 1000;
const base::TimeDelta kTimeout = base::TimeDelta::FromSeconds(1000);
SSLClientSessionCacheOpenSSL::Config config;
config.expiration_check_count = kExpirationCheckCount;
config.timeout = kTimeout;
SSLClientSessionCacheOpenSSL cache(config);
base::SimpleTestClock* clock = new base::SimpleTestClock;
cache.SetClockForTesting(make_scoped_ptr(clock));
// Insert an entry into the session cache.
ScopedSSL_SESSION session(SSL_SESSION_new());
cache.Insert("key", session.get());
EXPECT_EQ(session.get(), cache.Lookup("key").get());
EXPECT_EQ(1u, cache.size());
// Expire the session.
clock->Advance(kTimeout * 2);
// The entry has not been removed yet.
EXPECT_EQ(1u, cache.size());
// But it will not be returned on lookup and gets pruned at that point.
EXPECT_EQ(nullptr, cache.Lookup("key").get());
EXPECT_EQ(0u, cache.size());
// Sessions also are treated as expired if the clock rewinds.
cache.Insert("key", session.get());
EXPECT_EQ(session.get(), cache.Lookup("key").get());
EXPECT_EQ(1u, cache.size());
clock->Advance(-kTimeout * 2);
EXPECT_EQ(nullptr, cache.Lookup("key").get());
EXPECT_EQ(0u, cache.size());
}
} // namespace net
|
