src/chrome/browser/extensions/policy_handlers.cc

   1 // Copyright 2013 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/extensions/policy_handlers.h"
   6
   7 #include "base/logging.h"
   8 #include "base/prefs/pref_value_map.h"
   9 #include "chrome/browser/extensions/external_policy_loader.h"
  10 #include "chrome/common/pref_names.h"
  11 #include "components/policy/core/browser/policy_error_map.h"
  12 #include "components/policy/core/common/policy_map.h"
  13 #include "extensions/browser/pref_names.h"
  14 #include "extensions/common/extension.h"
  15 #include "grit/components_strings.h"
  16 #include "policy/policy_constants.h"
  17
  18 namespace extensions {
  19
  20 // ExtensionListPolicyHandler implementation -----------------------------------
  21
  22 ExtensionListPolicyHandler::ExtensionListPolicyHandler(const char* policy_name,
  23                                                        const char* pref_path,
  24                                                        bool allow_wildcards)
  25     : policy::TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_LIST),
  26       pref_path_(pref_path),
  27       allow_wildcards_(allow_wildcards) {}
  28
  29 ExtensionListPolicyHandler::~ExtensionListPolicyHandler() {}
  30
  31 bool ExtensionListPolicyHandler::CheckPolicySettings(
  32     const policy::PolicyMap& policies,
  33     policy::PolicyErrorMap* errors) {
  34   return CheckAndGetList(policies, errors, NULL);
  35 }
  36
  37 void ExtensionListPolicyHandler::ApplyPolicySettings(
  38     const policy::PolicyMap& policies,
  39     PrefValueMap* prefs) {
  40   scoped_ptr<base::ListValue> list;
  41   policy::PolicyErrorMap errors;
  42   if (CheckAndGetList(policies, &errors, &list) && list)
  43     prefs->SetValue(pref_path(), list.release());
  44 }
  45
  46 const char* ExtensionListPolicyHandler::pref_path() const {
  47   return pref_path_;
  48 }
  49
  50 bool ExtensionListPolicyHandler::CheckAndGetList(
  51     const policy::PolicyMap& policies,
  52     policy::PolicyErrorMap* errors,
  53     scoped_ptr<base::ListValue>* extension_ids) {
  54   if (extension_ids)
  55     extension_ids->reset();
  56
  57   const base::Value* value = NULL;
  58   if (!CheckAndGetValue(policies, errors, &value))
  59     return false;
  60
  61   if (!value)
  62     return true;
  63
  64   const base::ListValue* list_value = NULL;
  65   if (!value->GetAsList(&list_value)) {
  66     NOTREACHED();
  67     return false;
  68   }
  69
  70   // Filter the list, rejecting any invalid extension IDs.
  71   scoped_ptr<base::ListValue> filtered_list(new base::ListValue());
  72   for (base::ListValue::const_iterator entry(list_value->begin());
  73        entry != list_value->end(); ++entry) {
  74     std::string id;
  75     if (!(*entry)->GetAsString(&id)) {
  76       errors->AddError(policy_name(),
  77                        entry - list_value->begin(),
  78                        IDS_POLICY_TYPE_ERROR,
  79                        ValueTypeToString(base::Value::TYPE_STRING));
  80       continue;
  81     }
  82     if (!(allow_wildcards_ && id == "*") &&
  83         !extensions::Extension::IdIsValid(id)) {
  84       errors->AddError(policy_name(),
  85                        entry - list_value->begin(),
  86                        IDS_POLICY_VALUE_FORMAT_ERROR);
  87       continue;
  88     }
  89     filtered_list->Append(new base::StringValue(id));
  90   }
  91
  92   if (extension_ids)
  93     *extension_ids = filtered_list.Pass();
  94
  95   return true;
  96 }
  97
  98 // ExtensionInstallForcelistPolicyHandler implementation -----------------------
  99
 100 ExtensionInstallForcelistPolicyHandler::ExtensionInstallForcelistPolicyHandler()
 101     : policy::TypeCheckingPolicyHandler(policy::key::kExtensionInstallForcelist,
 102                                         base::Value::TYPE_LIST) {}
 103
 104 ExtensionInstallForcelistPolicyHandler::
 105     ~ExtensionInstallForcelistPolicyHandler() {}
 106
 107 bool ExtensionInstallForcelistPolicyHandler::CheckPolicySettings(
 108     const policy::PolicyMap& policies,
 109     policy::PolicyErrorMap* errors) {
 110   const base::Value* value;
 111   return CheckAndGetValue(policies, errors, &value) &&
 112       ParseList(value, NULL, errors);
 113 }
 114
 115 void ExtensionInstallForcelistPolicyHandler::ApplyPolicySettings(
 116     const policy::PolicyMap& policies,
 117     PrefValueMap* prefs) {
 118   const base::Value* value = NULL;
 119   scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
 120   if (CheckAndGetValue(policies, NULL, &value) &&
 121       value &&
 122       ParseList(value, dict.get(), NULL)) {
 123     prefs->SetValue(pref_names::kInstallForceList, dict.release());
 124   }
 125 }
 126
 127 bool ExtensionInstallForcelistPolicyHandler::ParseList(
 128     const base::Value* policy_value,
 129     base::DictionaryValue* extension_dict,
 130     policy::PolicyErrorMap* errors) {
 131   if (!policy_value)
 132     return true;
 133
 134   const base::ListValue* policy_list_value = NULL;
 135   if (!policy_value->GetAsList(&policy_list_value)) {
 136     // This should have been caught in CheckPolicySettings.
 137     NOTREACHED();
 138     return false;
 139   }
 140
 141   for (base::ListValue::const_iterator entry(policy_list_value->begin());
 142        entry != policy_list_value->end(); ++entry) {
 143     std::string entry_string;
 144     if (!(*entry)->GetAsString(&entry_string)) {
 145       if (errors) {
 146         errors->AddError(policy_name(),
 147                          entry - policy_list_value->begin(),
 148                          IDS_POLICY_TYPE_ERROR,
 149                          ValueTypeToString(base::Value::TYPE_STRING));
 150       }
 151       continue;
 152     }
 153
 154     // Each string item of the list has the following form:
 155     // <extension_id>;<update_url>
 156     // Note: The update URL might also contain semicolons.
 157     size_t pos = entry_string.find(';');
 158     if (pos == std::string::npos) {
 159       if (errors) {
 160         errors->AddError(policy_name(),
 161                          entry - policy_list_value->begin(),
 162                          IDS_POLICY_VALUE_FORMAT_ERROR);
 163       }
 164       continue;
 165     }
 166
 167     std::string extension_id = entry_string.substr(0, pos);
 168     std::string update_url = entry_string.substr(pos+1);
 169     if (!extensions::Extension::IdIsValid(extension_id) ||
 170         !GURL(update_url).is_valid()) {
 171       if (errors) {
 172         errors->AddError(policy_name(),
 173                          entry - policy_list_value->begin(),
 174                          IDS_POLICY_VALUE_FORMAT_ERROR);
 175       }
 176       continue;
 177     }
 178
 179     if (extension_dict) {
 180       extensions::ExternalPolicyLoader::AddExtension(
 181           extension_dict, extension_id, update_url);
 182     }
 183   }
 184
 185   return true;
 186 }
 187
 188 // ExtensionURLPatternListPolicyHandler implementation -------------------------
 189
 190 ExtensionURLPatternListPolicyHandler::ExtensionURLPatternListPolicyHandler(
 191     const char* policy_name,
 192     const char* pref_path)
 193     : policy::TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_LIST),
 194       pref_path_(pref_path) {}
 195
 196 ExtensionURLPatternListPolicyHandler::~ExtensionURLPatternListPolicyHandler() {}
 197
 198 bool ExtensionURLPatternListPolicyHandler::CheckPolicySettings(
 199     const policy::PolicyMap& policies,
 200     policy::PolicyErrorMap* errors) {
 201   const base::Value* value = NULL;
 202   if (!CheckAndGetValue(policies, errors, &value))
 203     return false;
 204
 205   if (!value)
 206     return true;
 207
 208   const base::ListValue* list_value = NULL;
 209   if (!value->GetAsList(&list_value)) {
 210     NOTREACHED();
 211     return false;
 212   }
 213
 214   // Check that the list contains valid URLPattern strings only.
 215   for (base::ListValue::const_iterator entry(list_value->begin());
 216        entry != list_value->end(); ++entry) {
 217     std::string url_pattern_string;
 218     if (!(*entry)->GetAsString(&url_pattern_string)) {
 219       errors->AddError(policy_name(),
 220                        entry - list_value->begin(),
 221                        IDS_POLICY_TYPE_ERROR,
 222                        ValueTypeToString(base::Value::TYPE_STRING));
 223       return false;
 224     }
 225
 226     URLPattern pattern(URLPattern::SCHEME_ALL);
 227     if (pattern.Parse(url_pattern_string) != URLPattern::PARSE_SUCCESS) {
 228       errors->AddError(policy_name(),
 229                        entry - list_value->begin(),
 230                        IDS_POLICY_VALUE_FORMAT_ERROR);
 231       return false;
 232     }
 233   }
 234
 235   return true;
 236 }
 237
 238 void ExtensionURLPatternListPolicyHandler::ApplyPolicySettings(
 239     const policy::PolicyMap& policies,
 240     PrefValueMap* prefs) {
 241   if (!pref_path_)
 242     return;
 243   const base::Value* value = policies.GetValue(policy_name());
 244   if (value)
 245     prefs->SetValue(pref_path_, value->DeepCopy());
 246 }
 247
 248 }  // namespace extensions