1 // Copyright (c) 2012 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 #ifndef CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_ 6 #define CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "content/common/content_export.h" 12 13 namespace base { 14 class FilePath; 15 } 16 17 namespace content { 18 19 // The ChildProcessSecurityPolicy class is used to grant and revoke security 20 // capabilities for child processes. For example, it restricts whether a child 21 // process is permitted to load file:// URLs based on whether the process 22 // has ever been commanded to load file:// URLs by the browser. 23 // 24 // ChildProcessSecurityPolicy is a singleton that may be used on any thread. 25 // 26 class ChildProcessSecurityPolicy { 27 public: 28 virtual ~ChildProcessSecurityPolicy() {} 29 30 // There is one global ChildProcessSecurityPolicy object for the entire 31 // browser process. The object returned by this method may be accessed on 32 // any thread. 33 static CONTENT_EXPORT ChildProcessSecurityPolicy* GetInstance(); 34 35 // Web-safe schemes can be requested by any child process. Once a web-safe 36 // scheme has been registered, any child process can request URLs with 37 // that scheme. There is no mechanism for revoking web-safe schemes. 38 virtual void RegisterWebSafeScheme(const std::string& scheme) = 0; 39 40 // Returns true iff |scheme| has been registered as a web-safe scheme. 41 virtual bool IsWebSafeScheme(const std::string& scheme) = 0; 42 43 // This permission grants only read access to a file. 44 // Whenever the user picks a file from a <input type="file"> element, the 45 // browser should call this function to grant the child process the capability 46 // to upload the file to the web. Grants FILE_PERMISSION_READ_ONLY. 47 virtual void GrantReadFile(int child_id, const base::FilePath& file) = 0; 48 49 // This permission grants creation, read, and full write access to a file, 50 // including attributes. 51 virtual void GrantCreateReadWriteFile(int child_id, 52 const base::FilePath& file) = 0; 53 54 // This permission grants creation and write access to a file. 55 virtual void GrantCreateWriteFile(int child_id, 56 const base::FilePath& file) = 0; 57 58 // These methods verify whether or not the child process has been granted 59 // permissions perform these functions on |file|. 60 61 // Before servicing a child process's request to upload a file to the web, the 62 // browser should call this method to determine whether the process has the 63 // capability to upload the requested file. 64 virtual bool CanReadFile(int child_id, const base::FilePath& file) = 0; 65 virtual bool CanWriteFile(int child_id, const base::FilePath& file) = 0; 66 virtual bool CanCreateFile(int child_id, const base::FilePath& file) = 0; 67 virtual bool CanCreateWriteFile(int child_id, const base::FilePath& file) = 0; 68 69 // Grants read access permission to the given isolated file system 70 // identified by |filesystem_id|. An isolated file system can be 71 // created for a set of native files/directories (like dropped files) 72 // using fileapi::IsolatedContext. A child process needs to be granted 73 // permission to the file system to access the files in it using 74 // file system URL. 75 // 76 // Note: to grant read access to the content of files you also need 77 // to give permission directly to the file paths using GrantReadFile. 78 // TODO(kinuko): We should unify this file-level and file-system-level 79 // permission when a file is accessed via a file system. 80 // 81 // Note: files/directories in the same file system share the same 82 // permission as far as they are accessed via the file system, i.e. 83 // using the file system URL (tip: you can create a new file system 84 // to give different permission to part of files). 85 virtual void GrantReadFileSystem(int child_id, 86 const std::string& filesystem_id) = 0; 87 88 // Grants write access permission to the given isolated file system 89 // identified by |filesystem_id|. See comments for GrantReadFileSystem 90 // for more details. For writing you do NOT need to give direct permission 91 // to individual file paths. 92 // 93 // This must be called with a great care as this gives write permission 94 // to all files/directories included in the file system. 95 virtual void GrantWriteFileSystem(int child_id, 96 const std::string& filesystem_id) = 0; 97 98 // Grant create file permission to the given isolated file system identified 99 // by |filesystem_id|. 100 // See comments for GrantReadFileSystem for more details. For creating you 101 // do NOT need to give direct permission to individual file paths. 102 // 103 // This must be called with a great care as this gives create permission 104 // within all directories included in the file system. 105 virtual void GrantCreateFileForFileSystem( 106 int child_id, 107 const std::string& filesystem_id) = 0; 108 109 // Grants permission to copy-into filesystem |filesystem_id|. 'copy-into' 110 // is used to allow copying files into the destination filesystem without 111 // granting more general create and write permissions. 112 virtual void GrantCopyIntoFileSystem(int child_id, 113 const std::string& filesystem_id) = 0; 114 115 // Grants the child process the capability to access URLs of the provided 116 // scheme. 117 virtual void GrantScheme(int child_id, const std::string& scheme) = 0; 118 119 // Returns true if read access has been granted to |filesystem_id|. 120 virtual bool CanReadFileSystem(int child_id, 121 const std::string& filesystem_id) = 0; 122 123 // Returns true if read and write access has been granted to |filesystem_id|. 124 virtual bool CanReadWriteFileSystem(int child_id, 125 const std::string& filesystem_id) = 0; 126 127 // Returns true if copy-into access has been granted to |filesystem_id|. 128 virtual bool CanCopyIntoFileSystem(int child_id, 129 const std::string& filesystem_id) = 0; 130 }; 131 132 }; // namespace content 133 134 #endif // CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_ 135
