chrome/browser/chromeos/net/onc_utils.cc

   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 "chrome/browser/chromeos/net/onc_utils.h"
   6
   7 #include "base/bind_helpers.h"
   8 #include "base/json/json_writer.h"
   9 #include "base/logging.h"
  10 #include "base/prefs/pref_service.h"
  11 #include "base/values.h"
  12 #include "chrome/browser/chromeos/ui_proxy_config.h"
  13 #include "chrome/browser/prefs/proxy_config_dictionary.h"
  14 #include "chrome/common/pref_names.h"
  15 #include "chromeos/network/managed_network_configuration_handler.h"
  16 #include "chromeos/network/network_configuration_handler.h"
  17 #include "chromeos/network/network_handler.h"
  18 #include "chromeos/network/network_profile.h"
  19 #include "chromeos/network/network_profile_handler.h"
  20 #include "chromeos/network/network_state.h"
  21 #include "chromeos/network/network_state_handler.h"
  22 #include "chromeos/network/network_ui_data.h"
  23 #include "chromeos/network/onc/onc_normalizer.h"
  24 #include "chromeos/network/onc/onc_signature.h"
  25 #include "chromeos/network/onc/onc_translator.h"
  26 #include "chromeos/network/onc/onc_utils.h"
  27 #include "components/user_manager/user.h"
  28 #include "components/user_manager/user_manager.h"
  29 #include "net/base/host_port_pair.h"
  30 #include "net/proxy/proxy_bypass_rules.h"
  31 #include "net/proxy/proxy_server.h"
  32 #include "third_party/cros_system_api/dbus/service_constants.h"
  33 #include "url/gurl.h"
  34
  35 namespace chromeos {
  36 namespace onc {
  37
  38 namespace {
  39
  40 net::ProxyServer ConvertOncProxyLocationToHostPort(
  41     net::ProxyServer::Scheme default_proxy_scheme,
  42     const base::DictionaryValue& onc_proxy_location) {
  43   std::string host;
  44   onc_proxy_location.GetStringWithoutPathExpansion(::onc::proxy::kHost, &host);
  45   // Parse |host| according to the format [<scheme>"://"]<server>[":"<port>].
  46   net::ProxyServer proxy_server =
  47       net::ProxyServer::FromURI(host, default_proxy_scheme);
  48   int port = 0;
  49   onc_proxy_location.GetIntegerWithoutPathExpansion(::onc::proxy::kPort, &port);
  50
  51   // Replace the port parsed from |host| by the provided |port|.
  52   return net::ProxyServer(
  53       proxy_server.scheme(),
  54       net::HostPortPair(proxy_server.host_port_pair().host(),
  55                         static_cast<uint16>(port)));
  56 }
  57
  58 void AppendProxyServerForScheme(
  59     const base::DictionaryValue& onc_manual,
  60     const std::string& onc_scheme,
  61     std::string* spec) {
  62   const base::DictionaryValue* onc_proxy_location = NULL;
  63   if (!onc_manual.GetDictionaryWithoutPathExpansion(onc_scheme,
  64                                                     &onc_proxy_location)) {
  65     return;
  66   }
  67
  68   net::ProxyServer::Scheme default_proxy_scheme = net::ProxyServer::SCHEME_HTTP;
  69   std::string url_scheme;
  70   if (onc_scheme == ::onc::proxy::kFtp) {
  71     url_scheme = "ftp";
  72   } else if (onc_scheme == ::onc::proxy::kHttp) {
  73     url_scheme = "http";
  74   } else if (onc_scheme == ::onc::proxy::kHttps) {
  75     url_scheme = "https";
  76   } else if (onc_scheme == ::onc::proxy::kSocks) {
  77     default_proxy_scheme = net::ProxyServer::SCHEME_SOCKS4;
  78     url_scheme = "socks";
  79   } else {
  80     NOTREACHED();
  81   }
  82
  83   net::ProxyServer proxy_server = ConvertOncProxyLocationToHostPort(
  84       default_proxy_scheme, *onc_proxy_location);
  85
  86   UIProxyConfig::EncodeAndAppendProxyServer(url_scheme, proxy_server, spec);
  87 }
  88
  89 net::ProxyBypassRules ConvertOncExcludeDomainsToBypassRules(
  90     const base::ListValue& onc_exclude_domains) {
  91   net::ProxyBypassRules rules;
  92   for (base::ListValue::const_iterator it = onc_exclude_domains.begin();
  93        it != onc_exclude_domains.end(); ++it) {
  94     std::string rule;
  95     (*it)->GetAsString(&rule);
  96     rules.AddRuleFromString(rule);
  97   }
  98   return rules;
  99 }
 100
 101 }  // namespace
 102
 103 scoped_ptr<base::DictionaryValue> ConvertOncProxySettingsToProxyConfig(
 104     const base::DictionaryValue& onc_proxy_settings) {
 105   std::string type;
 106   onc_proxy_settings.GetStringWithoutPathExpansion(::onc::proxy::kType, &type);
 107   scoped_ptr<base::DictionaryValue> proxy_dict;
 108
 109   if (type == ::onc::proxy::kDirect) {
 110     proxy_dict.reset(ProxyConfigDictionary::CreateDirect());
 111   } else if (type == ::onc::proxy::kWPAD) {
 112     proxy_dict.reset(ProxyConfigDictionary::CreateAutoDetect());
 113   } else if (type == ::onc::proxy::kPAC) {
 114     std::string pac_url;
 115     onc_proxy_settings.GetStringWithoutPathExpansion(::onc::proxy::kPAC,
 116                                                      &pac_url);
 117     GURL url(pac_url);
 118     DCHECK(url.is_valid())
 119         << "PAC field is invalid for this ProxySettings.Type";
 120     proxy_dict.reset(ProxyConfigDictionary::CreatePacScript(url.spec(),
 121                                                             false));
 122   } else if (type == ::onc::proxy::kManual) {
 123     const base::DictionaryValue* manual_dict = NULL;
 124     onc_proxy_settings.GetDictionaryWithoutPathExpansion(::onc::proxy::kManual,
 125                                                          &manual_dict);
 126     std::string manual_spec;
 127     AppendProxyServerForScheme(*manual_dict, ::onc::proxy::kFtp, &manual_spec);
 128     AppendProxyServerForScheme(*manual_dict, ::onc::proxy::kHttp, &manual_spec);
 129     AppendProxyServerForScheme(*manual_dict, ::onc::proxy::kSocks,
 130                                &manual_spec);
 131     AppendProxyServerForScheme(*manual_dict, ::onc::proxy::kHttps,
 132                                &manual_spec);
 133
 134     const base::ListValue* exclude_domains = NULL;
 135     net::ProxyBypassRules bypass_rules;
 136     if (onc_proxy_settings.GetListWithoutPathExpansion(
 137             ::onc::proxy::kExcludeDomains, &exclude_domains)) {
 138       bypass_rules.AssignFrom(
 139           ConvertOncExcludeDomainsToBypassRules(*exclude_domains));
 140     }
 141     proxy_dict.reset(ProxyConfigDictionary::CreateFixedServers(
 142         manual_spec, bypass_rules.ToString()));
 143   } else {
 144     NOTREACHED();
 145   }
 146   return proxy_dict.Pass();
 147 }
 148
 149 namespace {
 150
 151 // This class defines which string placeholders of ONC are replaced by which
 152 // user attribute.
 153 class UserStringSubstitution : public chromeos::onc::StringSubstitution {
 154  public:
 155   explicit UserStringSubstitution(const user_manager::User* user)
 156       : user_(user) {}
 157   virtual ~UserStringSubstitution() {}
 158
 159   virtual bool GetSubstitute(const std::string& placeholder,
 160                              std::string* substitute) const override {
 161     if (placeholder == ::onc::substitutes::kLoginIDField)
 162       *substitute = user_->GetAccountName(false);
 163     else if (placeholder == ::onc::substitutes::kEmailField)
 164       *substitute = user_->email();
 165     else
 166       return false;
 167     return true;
 168   }
 169
 170  private:
 171   const user_manager::User* user_;
 172
 173   DISALLOW_COPY_AND_ASSIGN(UserStringSubstitution);
 174 };
 175
 176 }  // namespace
 177
 178 void ExpandStringPlaceholdersInNetworksForUser(
 179     const user_manager::User* user,
 180     base::ListValue* network_configs) {
 181   if (!user) {
 182     // In tests no user may be logged in. It's not harmful if we just don't
 183     // expand the strings.
 184     return;
 185   }
 186   UserStringSubstitution substitution(user);
 187   chromeos::onc::ExpandStringsInNetworks(substitution, network_configs);
 188 }
 189
 190 void ImportNetworksForUser(const user_manager::User* user,
 191                            const base::ListValue& network_configs,
 192                            std::string* error) {
 193   error->clear();
 194
 195   scoped_ptr<base::ListValue> expanded_networks(network_configs.DeepCopy());
 196   ExpandStringPlaceholdersInNetworksForUser(user, expanded_networks.get());
 197
 198   const NetworkProfile* profile =
 199       NetworkHandler::Get()->network_profile_handler()->GetProfileForUserhash(
 200           user->username_hash());
 201   if (!profile) {
 202     *error = "User profile doesn't exist.";
 203     return;
 204   }
 205
 206   bool ethernet_not_found = false;
 207   for (base::ListValue::const_iterator it = expanded_networks->begin();
 208        it != expanded_networks->end();
 209        ++it) {
 210     const base::DictionaryValue* network = NULL;
 211     (*it)->GetAsDictionary(&network);
 212     DCHECK(network);
 213
 214     // Remove irrelevant fields.
 215     onc::Normalizer normalizer(true /* remove recommended fields */);
 216     scoped_ptr<base::DictionaryValue> normalized_network =
 217         normalizer.NormalizeObject(&onc::kNetworkConfigurationSignature,
 218                                    *network);
 219
 220     scoped_ptr<base::DictionaryValue> shill_dict =
 221         onc::TranslateONCObjectToShill(&onc::kNetworkConfigurationSignature,
 222                                        *normalized_network);
 223
 224     scoped_ptr<NetworkUIData> ui_data(
 225         NetworkUIData::CreateFromONC(::onc::ONC_SOURCE_USER_IMPORT));
 226     base::DictionaryValue ui_data_dict;
 227     ui_data->FillDictionary(&ui_data_dict);
 228     std::string ui_data_json;
 229     base::JSONWriter::Write(&ui_data_dict, &ui_data_json);
 230     shill_dict->SetStringWithoutPathExpansion(shill::kUIDataProperty,
 231                                               ui_data_json);
 232
 233     shill_dict->SetStringWithoutPathExpansion(shill::kProfileProperty,
 234                                               profile->path);
 235
 236     std::string type;
 237     shill_dict->GetStringWithoutPathExpansion(shill::kTypeProperty, &type);
 238     NetworkConfigurationHandler* config_handler =
 239         NetworkHandler::Get()->network_configuration_handler();
 240     if (NetworkTypePattern::Ethernet().MatchesType(type)) {
 241       // Ethernet has to be configured using an existing Ethernet service.
 242       const NetworkState* ethernet =
 243           NetworkHandler::Get()->network_state_handler()->FirstNetworkByType(
 244               NetworkTypePattern::Ethernet());
 245       if (ethernet) {
 246         config_handler->SetProperties(
 247             ethernet->path(), *shill_dict,
 248             NetworkConfigurationObserver::SOURCE_USER_ACTION, base::Closure(),
 249             network_handler::ErrorCallback());
 250       } else {
 251         ethernet_not_found = true;
 252       }
 253
 254     } else {
 255       config_handler->CreateConfiguration(
 256           *shill_dict,
 257           NetworkConfigurationObserver::SOURCE_USER_ACTION,
 258           network_handler::StringResultCallback(),
 259           network_handler::ErrorCallback());
 260     }
 261   }
 262
 263   if (ethernet_not_found)
 264     *error = "No Ethernet available to configure.";
 265 }
 266
 267 const base::DictionaryValue* FindPolicyForActiveUser(
 268     const std::string& guid,
 269     ::onc::ONCSource* onc_source) {
 270   const user_manager::User* user =
 271       user_manager::UserManager::Get()->GetActiveUser();
 272   std::string username_hash = user ? user->username_hash() : std::string();
 273   return NetworkHandler::Get()->managed_network_configuration_handler()->
 274       FindPolicyByGUID(username_hash, guid, onc_source);
 275 }
 276
 277 const base::DictionaryValue* GetGlobalConfigFromPolicy(bool for_active_user) {
 278   std::string username_hash;
 279   if (for_active_user) {
 280     const user_manager::User* user =
 281         user_manager::UserManager::Get()->GetActiveUser();
 282     if (!user) {
 283       LOG(ERROR) << "No user logged in yet.";
 284       return NULL;
 285     }
 286     username_hash = user->username_hash();
 287   }
 288   return NetworkHandler::Get()->managed_network_configuration_handler()->
 289       GetGlobalConfigFromPolicy(username_hash);
 290 }
 291
 292 bool PolicyAllowsOnlyPolicyNetworksToAutoconnect(bool for_active_user) {
 293   const base::DictionaryValue* global_config =
 294       GetGlobalConfigFromPolicy(for_active_user);
 295   if (!global_config)
 296     return false;  // By default, all networks are allowed to autoconnect.
 297
 298   bool only_policy_autoconnect = false;
 299   global_config->GetBooleanWithoutPathExpansion(
 300       ::onc::global_network_config::kAllowOnlyPolicyNetworksToAutoconnect,
 301       &only_policy_autoconnect);
 302   return only_policy_autoconnect;
 303 }
 304
 305 namespace {
 306
 307 const base::DictionaryValue* GetNetworkConfigByGUID(
 308     const base::ListValue& network_configs,
 309     const std::string& guid) {
 310   for (base::ListValue::const_iterator it = network_configs.begin();
 311        it != network_configs.end(); ++it) {
 312     const base::DictionaryValue* network = NULL;
 313     (*it)->GetAsDictionary(&network);
 314     DCHECK(network);
 315
 316     std::string current_guid;
 317     network->GetStringWithoutPathExpansion(::onc::network_config::kGUID,
 318                                            &current_guid);
 319     if (current_guid == guid)
 320       return network;
 321   }
 322   return NULL;
 323 }
 324
 325 const base::DictionaryValue* GetNetworkConfigForEthernetWithoutEAP(
 326     const base::ListValue& network_configs) {
 327   VLOG(2) << "Search for ethernet policy without EAP.";
 328   for (base::ListValue::const_iterator it = network_configs.begin();
 329        it != network_configs.end(); ++it) {
 330     const base::DictionaryValue* network = NULL;
 331     (*it)->GetAsDictionary(&network);
 332     DCHECK(network);
 333
 334     std::string type;
 335     network->GetStringWithoutPathExpansion(::onc::network_config::kType, &type);
 336     if (type != ::onc::network_type::kEthernet)
 337       continue;
 338
 339     const base::DictionaryValue* ethernet = NULL;
 340     network->GetDictionaryWithoutPathExpansion(::onc::network_config::kEthernet,
 341                                                &ethernet);
 342
 343     std::string auth;
 344     ethernet->GetStringWithoutPathExpansion(::onc::ethernet::kAuthentication,
 345                                             &auth);
 346     if (auth == ::onc::ethernet::kAuthenticationNone)
 347       return network;
 348   }
 349   return NULL;
 350 }
 351
 352 const base::DictionaryValue* GetNetworkConfigForNetworkFromOnc(
 353     const base::ListValue& network_configs,
 354     const NetworkState& network) {
 355   // In all cases except Ethernet, we use the GUID of |network|.
 356   if (!network.Matches(NetworkTypePattern::Ethernet()))
 357     return GetNetworkConfigByGUID(network_configs, network.guid());
 358
 359   // Ethernet is always shared and thus cannot store a GUID per user. Thus we
 360   // search for any Ethernet policy intead of a matching GUID.
 361   // EthernetEAP service contains only the EAP parameters and stores the GUID of
 362   // the respective ONC policy. The EthernetEAP service itself is however never
 363   // in state "connected". An EthernetEAP policy must be applied, if an Ethernet
 364   // service is connected using the EAP parameters.
 365   const NetworkState* ethernet_eap = NULL;
 366   if (NetworkHandler::IsInitialized()) {
 367     ethernet_eap =
 368         NetworkHandler::Get()->network_state_handler()->GetEAPForEthernet(
 369             network.path());
 370   }
 371
 372   // The GUID associated with the EthernetEAP service refers to the ONC policy
 373   // with "Authentication: 8021X".
 374   if (ethernet_eap)
 375     return GetNetworkConfigByGUID(network_configs, ethernet_eap->guid());
 376
 377   // Otherwise, EAP is not used and instead the Ethernet policy with
 378   // "Authentication: None" applies.
 379   return GetNetworkConfigForEthernetWithoutEAP(network_configs);
 380 }
 381
 382 const base::DictionaryValue* GetPolicyForNetworkFromPref(
 383     const PrefService* pref_service,
 384     const char* pref_name,
 385     const NetworkState& network) {
 386   if (!pref_service) {
 387     VLOG(2) << "No pref service";
 388     return NULL;
 389   }
 390
 391   const PrefService::Preference* preference =
 392       pref_service->FindPreference(pref_name);
 393   if (!preference) {
 394     VLOG(2) << "No preference " << pref_name;
 395     // The preference may not exist in tests.
 396     return NULL;
 397   }
 398
 399   // User prefs are not stored in this Preference yet but only the policy.
 400   //
 401   // The policy server incorrectly configures the OpenNetworkConfiguration user
 402   // policy as Recommended. To work around that, we handle the Recommended and
 403   // the Mandatory value in the same way.
 404   // TODO(pneubeck): Remove this workaround, once the server is fixed. See
 405   // http://crbug.com/280553 .
 406   if (preference->IsDefaultValue()) {
 407     VLOG(2) << "Preference has no recommended or mandatory value.";
 408     // No policy set.
 409     return NULL;
 410   }
 411   VLOG(2) << "Preference with policy found.";
 412   const base::Value* onc_policy_value = preference->GetValue();
 413   DCHECK(onc_policy_value);
 414
 415   const base::ListValue* onc_policy = NULL;
 416   onc_policy_value->GetAsList(&onc_policy);
 417   DCHECK(onc_policy);
 418
 419   return GetNetworkConfigForNetworkFromOnc(*onc_policy, network);
 420 }
 421
 422 }  // namespace
 423
 424 const base::DictionaryValue* GetPolicyForNetwork(
 425     const PrefService* profile_prefs,
 426     const PrefService* local_state_prefs,
 427     const NetworkState& network,
 428     ::onc::ONCSource* onc_source) {
 429   VLOG(2) << "GetPolicyForNetwork: " << network.path();
 430   *onc_source = ::onc::ONC_SOURCE_NONE;
 431
 432   const base::DictionaryValue* network_policy = GetPolicyForNetworkFromPref(
 433       profile_prefs, prefs::kOpenNetworkConfiguration, network);
 434   if (network_policy) {
 435     VLOG(1) << "Network " << network.path() << " is managed by user policy.";
 436     *onc_source = ::onc::ONC_SOURCE_USER_POLICY;
 437     return network_policy;
 438   }
 439   network_policy = GetPolicyForNetworkFromPref(
 440       local_state_prefs, prefs::kDeviceOpenNetworkConfiguration, network);
 441   if (network_policy) {
 442     VLOG(1) << "Network " << network.path() << " is managed by device policy.";
 443     *onc_source = ::onc::ONC_SOURCE_DEVICE_POLICY;
 444     return network_policy;
 445   }
 446   VLOG(2) << "Network " << network.path() << " is unmanaged.";
 447   return NULL;
 448 }
 449
 450 bool HasPolicyForNetwork(const PrefService* profile_prefs,
 451                          const PrefService* local_state_prefs,
 452                          const NetworkState& network) {
 453   ::onc::ONCSource ignored_onc_source;
 454   const base::DictionaryValue* policy = onc::GetPolicyForNetwork(
 455       profile_prefs, local_state_prefs, network, &ignored_onc_source);
 456   return policy != NULL;
 457 }
 458
 459 }  // namespace onc
 460 }  // namespace chromeos