pepper_isolated_file_system_message_filter.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9
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 "storage/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#if defined(ENABLE_EXTENSIONS) 102 extensions::ExtensionSystem* extension_system = 103 extensions::ExtensionSystem::Get(profile); 104 if (!extension_system) 105 return std::string(); 106 107 const ExtensionService* extension_service = 108 extension_system->extension_service(); 109 if (!extension_service) 110 return std::string(); 111 112 const extensions::Extension* extension = 113 extension_service->GetExtensionById(document_url_.host(), false); 114 if (!extension) 115 return std::string(); 116 117 // First level directory for isolated filesystem to lookup. 118 std::string kFirstLevelDirectory("crxfs"); 119 return storage::IsolatedContext::GetInstance()->RegisterFileSystemForPath( 120 storage::kFileSystemTypeNativeLocal, 121 std::string(), 122 extension->path(), 123 &kFirstLevelDirectory); 124#else 125 return std::string(); 126#endif 127} 128 129int32_t PepperIsolatedFileSystemMessageFilter::OnOpenFileSystem( 130 ppapi::host::HostMessageContext* context, 131 PP_IsolatedFileSystemType_Private type) { 132 switch (type) { 133 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_INVALID: 134 break; 135 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_CRX: 136 return OpenCrxFileSystem(context); 137 case PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE: 138 return OpenPluginPrivateFileSystem(context); 139 } 140 NOTREACHED(); 141 context->reply_msg = 142 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 143 return PP_ERROR_FAILED; 144} 145 146int32_t PepperIsolatedFileSystemMessageFilter::OpenCrxFileSystem( 147 ppapi::host::HostMessageContext* context) { 148#if defined(ENABLE_EXTENSIONS) 149 Profile* profile = GetProfile(); 150 const extensions::ExtensionSet* extension_set = NULL; 151 if (profile) { 152 extension_set = extensions::ExtensionSystem::Get(profile) 153 ->extension_service() 154 ->extensions(); 155 } 156 if (!IsExtensionOrSharedModuleWhitelisted( 157 document_url_, extension_set, allowed_crxfs_origins_) && 158 !IsHostAllowedByCommandLine( 159 document_url_, extension_set, switches::kAllowNaClCrxFsAPI)) { 160 LOG(ERROR) << "Host " << document_url_.host() << " cannot use CrxFs API."; 161 return PP_ERROR_NOACCESS; 162 } 163 164 // TODO(raymes): When we remove FileSystem from the renderer, we should create 165 // a pending PepperFileSystemBrowserHost here with the fsid and send the 166 // pending host ID back to the plugin. 167 const std::string fsid = CreateCrxFileSystem(profile); 168 if (fsid.empty()) { 169 context->reply_msg = 170 PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(std::string()); 171 return PP_ERROR_NOTSUPPORTED; 172 } 173 174 // Grant readonly access of isolated filesystem to renderer process. 175 content::ChildProcessSecurityPolicy* policy = 176 content::ChildProcessSecurityPolicy::GetInstance(); 177 policy->GrantReadFileSystem(render_process_id_, fsid); 178 179 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 180 return PP_OK; 181#else 182 return PP_ERROR_NOTSUPPORTED; 183#endif 184} 185 186int32_t PepperIsolatedFileSystemMessageFilter::OpenPluginPrivateFileSystem( 187 ppapi::host::HostMessageContext* context) { 188 DCHECK(ppapi_host_); 189 // Only plugins with private permission can open the filesystem. 190 if (!ppapi_host_->permissions().HasPermission(ppapi::PERMISSION_PRIVATE)) 191 return PP_ERROR_NOACCESS; 192 193 const std::string& root_name = ppapi::IsolatedFileSystemTypeToRootName( 194 PP_ISOLATEDFILESYSTEMTYPE_PRIVATE_PLUGINPRIVATE); 195 const std::string& fsid = 196 storage::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath( 197 storage::kFileSystemTypePluginPrivate, root_name, base::FilePath()); 198 199 // Grant full access of isolated filesystem to renderer process. 200 content::ChildProcessSecurityPolicy* policy = 201 content::ChildProcessSecurityPolicy::GetInstance(); 202 policy->GrantCreateReadWriteFileSystem(render_process_id_, fsid); 203 204 context->reply_msg = PpapiPluginMsg_IsolatedFileSystem_BrowserOpenReply(fsid); 205 return PP_OK; 206} 207 208} // namespace chrome 209