pepper_isolated_file_system_message_filter.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061
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/renderer_host/pepper/pepper_isolated_file_system_message_filter.h" 6 7#include "chrome/browser/browser_process.h" 8#include "chrome/browser/extensions/extension_service.h" 9#include "chrome/browser/profiles/profile.h" 10#include "chrome/browser/profiles/profile_manager.h" 11#include "chrome/common/chrome_switches.h" 12#include "chrome/common/pepper_permission_util.h" 13#include "content/public/browser/browser_ppapi_host.h" 14#include "content/public/browser/browser_thread.h" 15#include "content/public/browser/child_process_security_policy.h" 16#include "content/public/browser/render_view_host.h" 17#include "extensions/browser/extension_system.h" 18#include "extensions/common/constants.h" 19#include "extensions/common/extension.h" 20#include "extensions/common/extension_set.h" 21#include "ppapi/c/pp_errors.h" 22#include "ppapi/host/dispatch_host_message.h" 23#include "ppapi/host/host_message_context.h" 24#include "ppapi/host/ppapi_host.h" 25#include "ppapi/proxy/ppapi_messages.h" 26#include "ppapi/shared_impl/file_system_util.h" 27#include "webkit/browser/fileapi/isolated_context.h" 28 29namespace chrome { 30 31namespace { 32 33const char* kPredefinedAllowedCrxFsOrigins[] = { 34 "6EAED1924DB611B6EEF2A664BD077BE7EAD33B8F", // see crbug.com/234789 35 "4EB74897CB187C7633357C2FE832E0AD6A44883A" // see crbug.com/234789 36}; 37 38} // namespace 39 40// static 41PepperIsolatedFileSystemMessageFilter* 42PepperIsolatedFileSystemMessageFilter::Create(PP_Instance instance, 43 content::BrowserPpapiHost* host) { 44 int render_process_id; 45 int unused_render_frame_id; 46 if (!host->GetRenderFrameIDsForInstance( 47 instance, &render_process_id, &unused_render_frame_id)) { 48 return NULL; 49 } 50 return new PepperIsolatedFileSystemMessageFilter( 51 render_process_id, 52 host->GetProfileDataDirectory(), 53 host->GetDocumentURLForInstance(instance), 54 host->GetPpapiHost()); 55} 56 57PepperIsolatedFileSystemMessageFilter::PepperIsolatedFileSystemMessageFilter( 58 int render_process_id, 59 const base::FilePath& profile_directory, 60 const GURL& document_url, 61 ppapi::host::PpapiHost* ppapi_host) 62 : render_process_id_(render_process_id), 63 profile_directory_(profile_directory), 64 document_url_(document_url), 65 ppapi_host_(ppapi_host) { 66 for (size_t i = 0; i < arraysize(kPredefinedAllowedCrxFsOrigins); ++i) 67 allowed_crxfs_origins_.insert(kPredefinedAllowedCrxFsOrigins[i]); 68} 69 70PepperIsolatedFileSystemMessageFilter:: 71 ~PepperIsolatedFileSystemMessageFilter() {} 72 73scoped_refptr<base::TaskRunner> 74PepperIsolatedFileSystemMessageFilter::OverrideTaskRunnerForMessage( 75 const IPC::Message& msg) { 76 // In order to reach ExtensionSystem, we need to get ProfileManager first. 77 // ProfileManager lives in UI thread, so we need to do this in UI thread. 78 return content::BrowserThread::GetMessageLoopProxyForThread( 79 content::BrowserThread::UI); 80} 81 82int32_t PepperIsolatedFileSystemMessageFilter::OnResourceMessageReceived( 83 const IPC::Message& msg, 84 ppapi::host::HostMessageContext* context) { 85 PPAPI_BEGIN_MESSAGE_MAP(PepperIsolatedFileSystemMessageFilter, msg) 86 PPAPI_DISPATCH_HOST_RESOURCE_CALL( 87 PpapiHostMsg_IsolatedFileSystem_BrowserOpen, 88 OnOpenFileSystem) 89 PPAPI_END_MESSAGE_MAP() 90 return PP_ERROR_FAILED; 91} 92 93Profile* PepperIsolatedFileSystemMessageFilter::GetProfile() { 94 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 95 ProfileManager* profile_manager = g_browser_process->profile_manager(); 96 return profile_manager->GetProfile(profile_directory_); 97} 98 99std::string PepperIsolatedFileSystemMessageFilter::CreateCrxFileSystem( 100 Profile* profile) { 101 extensions::ExtensionSystem* extension_system = 102 extensions::ExtensionSystem::Get(profile); 103 if (!extension_system) 104 return std::string(); 105 106 const ExtensionService* extension_service = 107 extension_system->extension_service(); 108 if (!extension_service) 109 return std::string(); 110 111 const extensions::Extension* extension = 112 extension_service->GetExtensionById(document_url_.host(), false); 113 if (!extension) 114 return std::string(); 115 116 // First level directory for isolated filesystem to lookup. 117 std::string kFirstLevelDirectory("crxfs"); 118 return fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForPath( 119 fileapi::kFileSystemTypeNativeLocal, 120 extension->path(), 121 &kFirstLevelDirectory); 122} 123 124int32_t PepperIsolatedFileSystemMessageFilter::OnOpenFileSystem( 125 ppapi::host::HostMessageContext* context, 126 PP_IsolatedFileSystemType_Private type) { 127 switch (type) { 128 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_INVALID: 129 break; 130 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_CRX: 131 return OpenCrxFileSystem(context); 132 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE: 133 return OpenPluginPrivateFileSystem(context); 134 } 135 NOTREACHED(); 136 context->reply_msg = 137 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 138 return PP_ERROR_FAILED; 139} 140 141int32_t PepperIsolatedFileSystemMessageFilter::OpenCrxFileSystem( 142 ppapi::host::HostMessageContext* context) { 143 Profile* profile = GetProfile(); 144 const extensions::ExtensionSet* extension_set = NULL; 145 if (profile) { 146 extension_set = extensions::ExtensionSystem::Get(profile) 147 ->extension_service() 148 ->extensions(); 149 } 150 if (!IsExtensionOrSharedModuleWhitelisted( 151 document_url_, extension_set, allowed_crxfs_origins_) && 152 !IsHostAllowedByCommandLine( 153 document_url_, extension_set, switches::kAllowNaClCrxFsAPI)) { 154 LOG(ERROR) << "Host " << document_url_.host() << " cannot use CrxFs API."; 155 return PP_ERROR_NOACCESS; 156 } 157 158 // TODO(raymes): When we remove FileSystem from the renderer, we should create 159 // a pending PepperFileSystemBrowserHost here with the fsid and send the 160 // pending host ID back to the plugin. 161 const std::string fsid = CreateCrxFileSystem(profile); 162 if (fsid.empty()) { 163 context->reply_msg = 164 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 165 return PP_ERROR_NOTSUPPORTED; 166 } 167 168 // Grant readonly access of isolated filesystem to renderer process. 169 content::ChildProcessSecurityPolicy* policy = 170 content::ChildProcessSecurityPolicy::GetInstance(); 171 policy->GrantReadFileSystem(render_process_id_, fsid); 172 173 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 174 return PP_OK; 175} 176 177int32_t PepperIsolatedFileSystemMessageFilter::OpenPluginPrivateFileSystem( 178 ppapi::host::HostMessageContext* context) { 179 DCHECK(ppapi_host_); 180 // Only plugins with private permission can open the filesystem. 181 if (!ppapi_host_->permissions().HasPermission(ppapi::PERMISSION_PRIVATE)) 182 return PP_ERROR_NOACCESS; 183 184 const std::string& root_name = ppapi::IsolatedFileSystemTypeToRootName( 185 PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE); 186 const std::string& fsid = 187 fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath( 188 fileapi::kFileSystemTypePluginPrivate, root_name, base::FilePath()); 189 190 // Grant full access of isolated filesystem to renderer process. 191 content::ChildProcessSecurityPolicy* policy = 192 content::ChildProcessSecurityPolicy::GetInstance(); 193 policy->GrantCreateReadWriteFileSystem(render_process_id_, fsid); 194 195 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 196 return PP_OK; 197} 198 199} // namespace chrome 200