src/chrome/common/extensions/api/storage/storage_schema_manifest_handler.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/common/extensions/api/storage/storage_schema_manifest_handler.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/strings/string16.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "base/strings/utf_string_conversions.h"
  16 #include "extensions/common/extension.h"
  17 #include "extensions/common/install_warning.h"
  18 #include "extensions/common/manifest.h"
  19 #include "extensions/common/manifest_constants.h"
  20 #include "extensions/common/manifest_handlers/permissions_parser.h"
  21 #include "extensions/common/permissions/api_permission.h"
  22 #include "extensions/common/permissions/api_permission_set.h"
  23 #include "extensions/common/permissions/permissions_info.h"
  24
  25 #if defined(ENABLE_CONFIGURATION_POLICY)
  26 #include "components/policy/core/common/schema.h"
  27 #endif
  28
  29 using extensions::manifest_keys::kStorageManagedSchema;
  30
  31 namespace extensions {
  32
  33 StorageSchemaManifestHandler::StorageSchemaManifestHandler() {}
  34
  35 StorageSchemaManifestHandler::~StorageSchemaManifestHandler() {}
  36
  37 #if defined(ENABLE_CONFIGURATION_POLICY)
  38 // static
  39 policy::Schema StorageSchemaManifestHandler::GetSchema(
  40     const Extension* extension,
  41     std::string* error) {
  42   std::string path;
  43   extension->manifest()->GetString(kStorageManagedSchema, &path);
  44   base::FilePath file = base::FilePath::FromUTF8Unsafe(path);
  45   if (file.IsAbsolute() || file.ReferencesParent()) {
  46     *error = base::StringPrintf("%s must be a relative path without ..",
  47                                 kStorageManagedSchema);
  48     return policy::Schema();
  49   }
  50   file = extension->path().AppendASCII(path);
  51   if (!base::PathExists(file)) {
  52     *error =
  53         base::StringPrintf("File does not exist: %s", file.value().c_str());
  54     return policy::Schema();
  55   }
  56   std::string content;
  57   if (!base::ReadFileToString(file, &content)) {
  58     *error = base::StringPrintf("Can't read %s", file.value().c_str());
  59     return policy::Schema();
  60   }
  61   return policy::Schema::Parse(content, error);
  62 }
  63 #endif
  64
  65 bool StorageSchemaManifestHandler::Parse(Extension* extension,
  66                                          base::string16* error) {
  67   std::string path;
  68   if (!extension->manifest()->GetString(kStorageManagedSchema, &path)) {
  69     *error = base::ASCIIToUTF16(
  70         base::StringPrintf("%s must be a string", kStorageManagedSchema));
  71     return false;
  72   }
  73
  74   // If an extension declares the "storage.managed_schema" key then it gets
  75   // the "storage" permission implicitly.
  76   PermissionsParser::AddAPIPermission(extension, APIPermission::kStorage);
  77
  78   return true;
  79 }
  80
  81 bool StorageSchemaManifestHandler::Validate(
  82     const Extension* extension,
  83     std::string* error,
  84     std::vector<InstallWarning>* warnings) const {
  85 #if defined(ENABLE_CONFIGURATION_POLICY)
  86   return GetSchema(extension, error).valid();
  87 #else
  88   return true;
  89 #endif
  90 }
  91
  92 const std::vector<std::string> StorageSchemaManifestHandler::Keys() const {
  93   return SingleKey(kStorageManagedSchema);
  94 }
  95
  96 }  // namespace extensions