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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "net/ssl/ssl_client_session_cache_openssl.h" | |
6 | |
7 #include <utility> | |
8 | |
9 #include "base/time/clock.h" | |
10 #include "base/time/default_clock.h" | |
11 | |
12 namespace net { | |
13 | |
14 SSLClientSessionCacheOpenSSL::SSLClientSessionCacheOpenSSL(const Config& config) | |
15 : clock_(new base::DefaultClock), | |
16 config_(config), | |
17 cache_(config.max_entries), | |
18 lookups_since_flush_(0) { | |
19 } | |
20 | |
21 SSLClientSessionCacheOpenSSL::~SSLClientSessionCacheOpenSSL() { | |
22 Flush(); | |
23 } | |
24 | |
25 size_t SSLClientSessionCacheOpenSSL::size() const { | |
26 return cache_.size(); | |
27 } | |
28 | |
29 ScopedSSL_SESSION SSLClientSessionCacheOpenSSL::Lookup( | |
30 const std::string& cache_key) { | |
31 base::AutoLock lock(lock_); | |
32 | |
33 // Expire stale sessions. | |
34 lookups_since_flush_++; | |
35 if (lookups_since_flush_ >= config_.expiration_check_count) { | |
36 lookups_since_flush_ = 0; | |
37 FlushExpiredSessions(); | |
38 } | |
39 | |
40 CacheEntryMap::iterator iter = cache_.Get(cache_key); | |
41 if (iter == cache_.end()) | |
42 return nullptr; | |
43 if (IsExpired(iter->second.get(), clock_->Now())) { | |
44 cache_.Erase(iter); | |
45 return nullptr; | |
46 } | |
47 return ScopedSSL_SESSION(SSL_SESSION_up_ref(iter->second->session.get())); | |
48 } | |
49 | |
50 void SSLClientSessionCacheOpenSSL::Insert(const std::string& cache_key, | |
51 SSL_SESSION* session) { | |
52 base::AutoLock lock(lock_); | |
53 | |
54 // Make a new entry. | |
55 std::unique_ptr<CacheEntry> entry(new CacheEntry); | |
56 entry->session.reset(SSL_SESSION_up_ref(session)); | |
57 entry->creation_time = clock_->Now(); | |
58 | |
59 // Takes ownership. | |
60 cache_.Put(cache_key, std::move(entry)); | |
61 } | |
62 | |
63 void SSLClientSessionCacheOpenSSL::Flush() { | |
64 base::AutoLock lock(lock_); | |
65 | |
66 cache_.Clear(); | |
67 } | |
68 | |
69 void SSLClientSessionCacheOpenSSL::SetClockForTesting( | |
70 std::unique_ptr<base::Clock> clock) { | |
71 clock_ = std::move(clock); | |
72 } | |
73 | |
74 SSLClientSessionCacheOpenSSL::CacheEntry::CacheEntry() { | |
75 } | |
76 | |
77 SSLClientSessionCacheOpenSSL::CacheEntry::~CacheEntry() { | |
78 } | |
79 | |
80 bool SSLClientSessionCacheOpenSSL::IsExpired( | |
81 SSLClientSessionCacheOpenSSL::CacheEntry* entry, | |
82 const base::Time& now) { | |
83 return now < entry->creation_time || | |
84 entry->creation_time + config_.timeout < now; | |
85 } | |
86 | |
87 void SSLClientSessionCacheOpenSSL::FlushExpiredSessions() { | |
88 base::Time now = clock_->Now(); | |
89 CacheEntryMap::iterator iter = cache_.begin(); | |
90 while (iter != cache_.end()) { | |
91 if (IsExpired(iter->second.get(), now)) { | |
92 iter = cache_.Erase(iter); | |
93 } else { | |
94 ++iter; | |
95 } | |
96 } | |
97 } | |
98 | |
99 } // namespace net | |
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