pepper_isolated_file_system_message_filter.cc revision a02191e04bc25c4935f804f2c080ae28663d096d
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 IPC_BEGIN_MESSAGE_MAP(PepperIsolatedFileSystemMessageFilter, msg) 86 PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_IsolatedFileSystem_BrowserOpen, 87 OnOpenFileSystem); 88 IPC_END_MESSAGE_MAP() 89 return PP_ERROR_FAILED; 90} 91 92Profile* PepperIsolatedFileSystemMessageFilter::GetProfile() { 93 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 94 ProfileManager* profile_manager = g_browser_process->profile_manager(); 95 return profile_manager->GetProfile(profile_directory_); 96} 97 98std::string PepperIsolatedFileSystemMessageFilter::CreateCrxFileSystem( 99 Profile* profile) { 100 extensions::ExtensionSystem* extension_system = 101 extensions::ExtensionSystem::Get(profile); 102 if (!extension_system) 103 return std::string(); 104 105 const ExtensionService* extension_service = 106 extension_system->extension_service(); 107 if (!extension_service) 108 return std::string(); 109 110 const extensions::Extension* extension = 111 extension_service->GetExtensionById(document_url_.host(), false); 112 if (!extension) 113 return std::string(); 114 115 // First level directory for isolated filesystem to lookup. 116 std::string kFirstLevelDirectory("crxfs"); 117 return fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForPath( 118 fileapi::kFileSystemTypeNativeLocal, 119 extension->path(), 120 &kFirstLevelDirectory); 121} 122 123int32_t PepperIsolatedFileSystemMessageFilter::OnOpenFileSystem( 124 ppapi::host::HostMessageContext* context, 125 PP_IsolatedFileSystemType_Private type) { 126 switch (type) { 127 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_INVALID: 128 break; 129 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_CRX: 130 return OpenCrxFileSystem(context); 131 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE: 132 return OpenPluginPrivateFileSystem(context); 133 } 134 NOTREACHED(); 135 context->reply_msg = 136 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 137 return PP_ERROR_FAILED; 138} 139 140int32_t PepperIsolatedFileSystemMessageFilter::OpenCrxFileSystem( 141 ppapi::host::HostMessageContext* context) { 142 Profile* profile = GetProfile(); 143 const extensions::ExtensionSet* extension_set = NULL; 144 if (profile) { 145 extension_set = extensions::ExtensionSystem::Get(profile) 146 ->extension_service() 147 ->extensions(); 148 } 149 if (!IsExtensionOrSharedModuleWhitelisted( 150 document_url_, extension_set, allowed_crxfs_origins_) && 151 !IsHostAllowedByCommandLine( 152 document_url_, extension_set, switches::kAllowNaClCrxFsAPI)) { 153 LOG(ERROR) << "Host " << document_url_.host() << " cannot use CrxFs API."; 154 return PP_ERROR_NOACCESS; 155 } 156 157 // TODO(raymes): When we remove FileSystem from the renderer, we should create 158 // a pending PepperFileSystemBrowserHost here with the fsid and send the 159 // pending host ID back to the plugin. 160 const std::string fsid = CreateCrxFileSystem(profile); 161 if (fsid.empty()) { 162 context->reply_msg = 163 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 164 return PP_ERROR_NOTSUPPORTED; 165 } 166 167 // Grant readonly access of isolated filesystem to renderer process. 168 content::ChildProcessSecurityPolicy* policy = 169 content::ChildProcessSecurityPolicy::GetInstance(); 170 policy->GrantReadFileSystem(render_process_id_, fsid); 171 172 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 173 return PP_OK; 174} 175 176int32_t PepperIsolatedFileSystemMessageFilter::OpenPluginPrivateFileSystem( 177 ppapi::host::HostMessageContext* context) { 178 DCHECK(ppapi_host_); 179 // Only plugins with private permission can open the filesystem. 180 if (!ppapi_host_->permissions().HasPermission(ppapi::PERMISSION_PRIVATE)) 181 return PP_ERROR_NOACCESS; 182 183 const std::string& root_name = ppapi::IsolatedFileSystemTypeToRootName( 184 PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE); 185 const std::string& fsid = 186 fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath( 187 fileapi::kFileSystemTypePluginPrivate, root_name, base::FilePath()); 188 189 // Grant full access of isolated filesystem to renderer process. 190 content::ChildProcessSecurityPolicy* policy = 191 content::ChildProcessSecurityPolicy::GetInstance(); 192 policy->GrantCreateReadWriteFileSystem(render_process_id_, fsid); 193 194 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 195 return PP_OK; 196} 197 198} // namespace chrome 199