src/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(ethernet->path(),
 247                                       *shill_dict,
 248                                       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           network_handler::StringResultCallback(),
 258           network_handler::ErrorCallback());
 259     }
 260   }
 261
 262   if (ethernet_not_found)
 263     *error = "No Ethernet available to configure.";
 264 }
 265
 266 const base::DictionaryValue* FindPolicyForActiveUser(
 267     const std::string& guid,
 268     ::onc::ONCSource* onc_source) {
 269   const user_manager::User* user =
 270       user_manager::UserManager::Get()->GetActiveUser();
 271   std::string username_hash = user ? user->username_hash() : std::string();
 272   return NetworkHandler::Get()->managed_network_configuration_handler()->
 273       FindPolicyByGUID(username_hash, guid, onc_source);
 274 }
 275
 276 const base::DictionaryValue* GetGlobalConfigFromPolicy(bool for_active_user) {
 277   std::string username_hash;
 278   if (for_active_user) {
 279     const user_manager::User* user =
 280         user_manager::UserManager::Get()->GetActiveUser();
 281     if (!user) {
 282       LOG(ERROR) << "No user logged in yet.";
 283       return NULL;
 284     }
 285     username_hash = user->username_hash();
 286   }
 287   return NetworkHandler::Get()->managed_network_configuration_handler()->
 288       GetGlobalConfigFromPolicy(username_hash);
 289 }
 290
 291 bool PolicyAllowsOnlyPolicyNetworksToAutoconnect(bool for_active_user) {
 292   const base::DictionaryValue* global_config =
 293       GetGlobalConfigFromPolicy(for_active_user);
 294   if (!global_config)
 295     return false;  // By default, all networks are allowed to autoconnect.
 296
 297   bool only_policy_autoconnect = false;
 298   global_config->GetBooleanWithoutPathExpansion(
 299       ::onc::global_network_config::kAllowOnlyPolicyNetworksToAutoconnect,
 300       &only_policy_autoconnect);
 301   return only_policy_autoconnect;
 302 }
 303
 304 namespace {
 305
 306 const base::DictionaryValue* GetNetworkConfigByGUID(
 307     const base::ListValue& network_configs,
 308     const std::string& guid) {
 309   for (base::ListValue::const_iterator it = network_configs.begin();
 310        it != network_configs.end(); ++it) {
 311     const base::DictionaryValue* network = NULL;
 312     (*it)->GetAsDictionary(&network);
 313     DCHECK(network);
 314
 315     std::string current_guid;
 316     network->GetStringWithoutPathExpansion(::onc::network_config::kGUID,
 317                                            &current_guid);
 318     if (current_guid == guid)
 319       return network;
 320   }
 321   return NULL;
 322 }
 323
 324 const base::DictionaryValue* GetNetworkConfigForEthernetWithoutEAP(
 325     const base::ListValue& network_configs) {
 326   VLOG(2) << "Search for ethernet policy without EAP.";
 327   for (base::ListValue::const_iterator it = network_configs.begin();
 328        it != network_configs.end(); ++it) {
 329     const base::DictionaryValue* network = NULL;
 330     (*it)->GetAsDictionary(&network);
 331     DCHECK(network);
 332
 333     std::string type;
 334     network->GetStringWithoutPathExpansion(::onc::network_config::kType, &type);
 335     if (type != ::onc::network_type::kEthernet)
 336       continue;
 337
 338     const base::DictionaryValue* ethernet = NULL;
 339     network->GetDictionaryWithoutPathExpansion(::onc::network_config::kEthernet,
 340                                                &ethernet);
 341
 342     std::string auth;
 343     ethernet->GetStringWithoutPathExpansion(::onc::ethernet::kAuthentication,
 344                                             &auth);
 345     if (auth == ::onc::ethernet::kAuthenticationNone)
 346       return network;
 347   }
 348   return NULL;
 349 }
 350
 351 const base::DictionaryValue* GetNetworkConfigForNetworkFromOnc(
 352     const base::ListValue& network_configs,
 353     const NetworkState& network) {
 354   // In all cases except Ethernet, we use the GUID of |network|.
 355   if (!network.Matches(NetworkTypePattern::Ethernet()))
 356     return GetNetworkConfigByGUID(network_configs, network.guid());
 357
 358   // Ethernet is always shared and thus cannot store a GUID per user. Thus we
 359   // search for any Ethernet policy intead of a matching GUID.
 360   // EthernetEAP service contains only the EAP parameters and stores the GUID of
 361   // the respective ONC policy. The EthernetEAP service itself is however never
 362   // in state "connected". An EthernetEAP policy must be applied, if an Ethernet
 363   // service is connected using the EAP parameters.
 364   const NetworkState* ethernet_eap = NULL;
 365   if (NetworkHandler::IsInitialized()) {
 366     ethernet_eap =
 367         NetworkHandler::Get()->network_state_handler()->GetEAPForEthernet(
 368             network.path());
 369   }
 370
 371   // The GUID associated with the EthernetEAP service refers to the ONC policy
 372   // with "Authentication: 8021X".
 373   if (ethernet_eap)
 374     return GetNetworkConfigByGUID(network_configs, ethernet_eap->guid());
 375
 376   // Otherwise, EAP is not used and instead the Ethernet policy with
 377   // "Authentication: None" applies.
 378   return GetNetworkConfigForEthernetWithoutEAP(network_configs);
 379 }
 380
 381 const base::DictionaryValue* GetPolicyForNetworkFromPref(
 382     const PrefService* pref_service,
 383     const char* pref_name,
 384     const NetworkState& network) {
 385   if (!pref_service) {
 386     VLOG(2) << "No pref service";
 387     return NULL;
 388   }
 389
 390   const PrefService::Preference* preference =
 391       pref_service->FindPreference(pref_name);
 392   if (!preference) {
 393     VLOG(2) << "No preference " << pref_name;
 394     // The preference may not exist in tests.
 395     return NULL;
 396   }
 397
 398   // User prefs are not stored in this Preference yet but only the policy.
 399   //
 400   // The policy server incorrectly configures the OpenNetworkConfiguration user
 401   // policy as Recommended. To work around that, we handle the Recommended and
 402   // the Mandatory value in the same way.
 403   // TODO(pneubeck): Remove this workaround, once the server is fixed. See
 404   // http://crbug.com/280553 .
 405   if (preference->IsDefaultValue()) {
 406     VLOG(2) << "Preference has no recommended or mandatory value.";
 407     // No policy set.
 408     return NULL;
 409   }
 410   VLOG(2) << "Preference with policy found.";
 411   const base::Value* onc_policy_value = preference->GetValue();
 412   DCHECK(onc_policy_value);
 413
 414   const base::ListValue* onc_policy = NULL;
 415   onc_policy_value->GetAsList(&onc_policy);
 416   DCHECK(onc_policy);
 417
 418   return GetNetworkConfigForNetworkFromOnc(*onc_policy, network);
 419 }
 420
 421 }  // namespace
 422
 423 const base::DictionaryValue* GetPolicyForNetwork(
 424     const PrefService* profile_prefs,
 425     const PrefService* local_state_prefs,
 426     const NetworkState& network,
 427     ::onc::ONCSource* onc_source) {
 428   VLOG(2) << "GetPolicyForNetwork: " << network.path();
 429   *onc_source = ::onc::ONC_SOURCE_NONE;
 430
 431   const base::DictionaryValue* network_policy = GetPolicyForNetworkFromPref(
 432       profile_prefs, prefs::kOpenNetworkConfiguration, network);
 433   if (network_policy) {
 434     VLOG(1) << "Network " << network.path() << " is managed by user policy.";
 435     *onc_source = ::onc::ONC_SOURCE_USER_POLICY;
 436     return network_policy;
 437   }
 438   network_policy = GetPolicyForNetworkFromPref(
 439       local_state_prefs, prefs::kDeviceOpenNetworkConfiguration, network);
 440   if (network_policy) {
 441     VLOG(1) << "Network " << network.path() << " is managed by device policy.";
 442     *onc_source = ::onc::ONC_SOURCE_DEVICE_POLICY;
 443     return network_policy;
 444   }
 445   VLOG(2) << "Network " << network.path() << " is unmanaged.";
 446   return NULL;
 447 }
 448
 449 bool HasPolicyForNetwork(const PrefService* profile_prefs,
 450                          const PrefService* local_state_prefs,
 451                          const NetworkState& network) {
 452   ::onc::ONCSource ignored_onc_source;
 453   const base::DictionaryValue* policy = onc::GetPolicyForNetwork(
 454       profile_prefs, local_state_prefs, network, &ignored_onc_source);
 455   return policy != NULL;
 456 }
 457
 458 }  // namespace onc
 459 }  // namespace chromeos