1 // Copyright (c) 2012 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_config_service.h" 6 7 #include "base/lazy_instance.h" 8 #include "base/memory/ref_counted.h" 9 #include "base/synchronization/lock.h" 10 #include "net/cert/crl_set.h" 11 #include "net/ssl/ssl_config_service_defaults.h" 12 13 #if defined(USE_OPENSSL) 14 #include <openssl/ssl.h> 15 #endif 16 17 namespace net { 18 19 static uint16 g_default_version_min = SSL_PROTOCOL_VERSION_SSL3; 20 21 static uint16 g_default_version_max = 22 #if defined(USE_OPENSSL) 23 #if defined(SSL_OP_NO_TLSv1_2) 24 SSL_PROTOCOL_VERSION_TLS1_2; 25 #elif defined(SSL_OP_NO_TLSv1_1) 26 SSL_PROTOCOL_VERSION_TLS1_1; 27 #else 28 SSL_PROTOCOL_VERSION_TLS1; 29 #endif 30 #else 31 SSL_PROTOCOL_VERSION_TLS1_2; 32 #endif 33 34 SSLConfig::CertAndStatus::CertAndStatus() : cert_status(0) {} 35 36 SSLConfig::CertAndStatus::~CertAndStatus() {} 37 38 SSLConfig::SSLConfig() 39 : rev_checking_enabled(false), 40 rev_checking_required_local_anchors(false), 41 version_min(g_default_version_min), 42 version_max(g_default_version_max), 43 cached_info_enabled(false), 44 channel_id_enabled(true), 45 false_start_enabled(false), 46 unrestricted_ssl3_fallback_enabled(false), 47 send_client_cert(false), 48 verify_ev_cert(false), 49 version_fallback(false), 50 cert_io_enabled(true) { 51 } 52 53 SSLConfig::~SSLConfig() { 54 } 55 56 bool SSLConfig::IsAllowedBadCert(X509Certificate* cert, 57 CertStatus* cert_status) const { 58 std::string der_cert; 59 if (!X509Certificate::GetDEREncoded(cert->os_cert_handle(), &der_cert)) 60 return false; 61 return IsAllowedBadCert(der_cert, cert_status); 62 } 63 64 bool SSLConfig::IsAllowedBadCert(const base::StringPiece& der_cert, 65 CertStatus* cert_status) const { 66 for (size_t i = 0; i < allowed_bad_certs.size(); ++i) { 67 if (der_cert == allowed_bad_certs[i].der_cert) { 68 if (cert_status) 69 *cert_status = allowed_bad_certs[i].cert_status; 70 return true; 71 } 72 } 73 return false; 74 } 75 76 SSLConfigService::SSLConfigService() 77 : observer_list_(ObserverList<Observer>::NOTIFY_EXISTING_ONLY) { 78 } 79 80 static bool g_cached_info_enabled = false; 81 82 // GlobalCRLSet holds a reference to the global CRLSet. It simply wraps a lock 83 // around a scoped_refptr so that getting a reference doesn't race with 84 // updating the CRLSet. 85 class GlobalCRLSet { 86 public: 87 void Set(const scoped_refptr<CRLSet>& new_crl_set) { 88 base::AutoLock locked(lock_); 89 crl_set_ = new_crl_set; 90 } 91 92 scoped_refptr<CRLSet> Get() const { 93 base::AutoLock locked(lock_); 94 return crl_set_; 95 } 96 97 private: 98 scoped_refptr<CRLSet> crl_set_; 99 mutable base::Lock lock_; 100 }; 101 102 base::LazyInstance<GlobalCRLSet>::Leaky g_crl_set = LAZY_INSTANCE_INITIALIZER; 103 104 // static 105 void SSLConfigService::SetCRLSet(scoped_refptr<CRLSet> crl_set) { 106 // Note: this can be called concurently with GetCRLSet(). 107 g_crl_set.Get().Set(crl_set); 108 } 109 110 // static 111 scoped_refptr<CRLSet> SSLConfigService::GetCRLSet() { 112 return g_crl_set.Get().Get(); 113 } 114 115 void SSLConfigService::EnableCachedInfo() { 116 g_cached_info_enabled = true; 117 } 118 119 // static 120 bool SSLConfigService::cached_info_enabled() { 121 return g_cached_info_enabled; 122 } 123 124 // static 125 uint16 SSLConfigService::default_version_min() { 126 return g_default_version_min; 127 } 128 129 // static 130 uint16 SSLConfigService::default_version_max() { 131 return g_default_version_max; 132 } 133 134 void SSLConfigService::AddObserver(Observer* observer) { 135 observer_list_.AddObserver(observer); 136 } 137 138 void SSLConfigService::RemoveObserver(Observer* observer) { 139 observer_list_.RemoveObserver(observer); 140 } 141 142 void SSLConfigService::NotifySSLConfigChange() { 143 FOR_EACH_OBSERVER(Observer, observer_list_, OnSSLConfigChanged()); 144 } 145 146 SSLConfigService::~SSLConfigService() { 147 } 148 149 // static 150 void SSLConfigService::SetSSLConfigFlags(SSLConfig* ssl_config) { 151 ssl_config->cached_info_enabled = g_cached_info_enabled; 152 } 153 154 void SSLConfigService::ProcessConfigUpdate(const SSLConfig& orig_config, 155 const SSLConfig& new_config) { 156 bool config_changed = 157 (orig_config.rev_checking_enabled != new_config.rev_checking_enabled) || 158 (orig_config.rev_checking_required_local_anchors != 159 new_config.rev_checking_required_local_anchors) || 160 (orig_config.version_min != new_config.version_min) || 161 (orig_config.version_max != new_config.version_max) || 162 (orig_config.disabled_cipher_suites != 163 new_config.disabled_cipher_suites) || 164 (orig_config.channel_id_enabled != new_config.channel_id_enabled) || 165 (orig_config.false_start_enabled != new_config.false_start_enabled) || 166 (orig_config.unrestricted_ssl3_fallback_enabled != 167 new_config.unrestricted_ssl3_fallback_enabled); 168 169 if (config_changed) 170 NotifySSLConfigChange(); 171 } 172 173 // static 174 bool SSLConfigService::IsSNIAvailable(SSLConfigService* service) { 175 if (!service) 176 return false; 177 178 SSLConfig ssl_config; 179 service->GetSSLConfig(&ssl_config); 180 return ssl_config.version_max >= SSL_PROTOCOL_VERSION_TLS1; 181 } 182 183 } // namespace net 184
