chrome/common/pepper_permission_util.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/pepper_permission_util.h"
   6
   7 #include <vector>
   8
   9 #include "base/command_line.h"
  10 #include "base/sha1.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_tokenizer.h"
  13 #include "extensions/common/constants.h"
  14 #include "extensions/common/extension.h"
  15 #include "extensions/common/extension_set.h"
  16 #include "extensions/common/manifest_handlers/shared_module_info.h"
  17
  18 using extensions::Extension;
  19 using extensions::Manifest;
  20
  21 namespace chrome {
  22
  23 namespace {
  24
  25 std::string HashHost(const std::string& host) {
  26   const std::string id_hash = base::SHA1HashString(host);
  27   DCHECK_EQ(id_hash.length(), base::kSHA1Length);
  28   return base::HexEncode(id_hash.c_str(), id_hash.length());
  29 }
  30
  31 bool HostIsInSet(const std::string& host, const std::set<std::string>& set) {
  32   return set.count(host) > 0 || set.count(HashHost(host)) > 0;
  33 }
  34
  35 }  // namespace
  36
  37 bool IsExtensionOrSharedModuleWhitelisted(
  38     const GURL& url,
  39     const extensions::ExtensionSet* extension_set,
  40     const std::set<std::string>& whitelist) {
  41   if (!url.is_valid() || !url.SchemeIs(extensions::kExtensionScheme))
  42     return false;
  43
  44   const std::string host = url.host();
  45   if (HostIsInSet(host, whitelist))
  46     return true;
  47
  48   // Check the modules that are imported by this extension to see if any of them
  49   // is whitelisted.
  50   const Extension* extension = extension_set ? extension_set->GetByID(host)
  51                                              : NULL;
  52   if (extension) {
  53     typedef std::vector<extensions::SharedModuleInfo::ImportInfo>
  54         ImportInfoVector;
  55     const ImportInfoVector& imports =
  56         extensions::SharedModuleInfo::GetImports(extension);
  57     for (ImportInfoVector::const_iterator it = imports.begin();
  58          it != imports.end(); ++it) {
  59       const Extension* imported_extension = extension_set->GetByID(
  60           it->extension_id);
  61       if (imported_extension &&
  62           extensions::SharedModuleInfo::IsSharedModule(imported_extension) &&
  63           HostIsInSet(it->extension_id, whitelist)) {
  64         return true;
  65       }
  66     }
  67   }
  68
  69   return false;
  70 }
  71
  72 bool IsHostAllowedByCommandLine(const GURL& url,
  73                                 const extensions::ExtensionSet* extension_set,
  74                                 const char* command_line_switch) {
  75   if (!url.is_valid())
  76     return false;
  77
  78   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  79   const std::string allowed_list =
  80       command_line.GetSwitchValueASCII(command_line_switch);
  81   if (allowed_list.empty())
  82     return false;
  83
  84   const std::string host = url.host();
  85   if (allowed_list == "*") {
  86     // For now, we only allow packaged and platform apps in this wildcard.
  87     if (!extension_set || !url.SchemeIs(extensions::kExtensionScheme))
  88       return false;
  89
  90     const Extension* extension = extension_set->GetByID(host);
  91     return extension &&
  92         (extension->GetType() == Manifest::TYPE_LEGACY_PACKAGED_APP ||
  93          extension->GetType() == Manifest::TYPE_PLATFORM_APP);
  94   }
  95
  96   base::StringTokenizer t(allowed_list, ",");
  97   while (t.GetNext()) {
  98     if (t.token() == host)
  99       return true;
 100   }
 101
 102   return false;
 103 }
 104
 105 }  // namespace chrome