content/public/browser/child_process_security_policy.h

   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 #include "url/gurl.h"
  13
  14 namespace base {
  15 class FilePath;
  16 }
  17
  18 namespace content {
  19
  20 // The ChildProcessSecurityPolicy class is used to grant and revoke security
  21 // capabilities for child processes.  For example, it restricts whether a child
  22 // process is permitted to load file:// URLs based on whether the process
  23 // has ever been commanded to load file:// URLs by the browser.
  24 //
  25 // ChildProcessSecurityPolicy is a singleton that may be used on any thread.
  26 //
  27 class ChildProcessSecurityPolicy {
  28  public:
  29   virtual ~ChildProcessSecurityPolicy() {}
  30
  31   // There is one global ChildProcessSecurityPolicy object for the entire
  32   // browser process.  The object returned by this method may be accessed on
  33   // any thread.
  34   static CONTENT_EXPORT ChildProcessSecurityPolicy* GetInstance();
  35
  36   // Web-safe schemes can be requested by any child process.  Once a web-safe
  37   // scheme has been registered, any child process can request URLs with
  38   // that scheme.  There is no mechanism for revoking web-safe schemes.
  39   virtual void RegisterWebSafeScheme(const std::string& scheme) = 0;
  40
  41   // Returns true iff |scheme| has been registered as a web-safe scheme.
  42   virtual bool IsWebSafeScheme(const std::string& scheme) = 0;
  43
  44   // This permission grants only read access to a file.
  45   // Whenever the user picks a file from a <input type="file"> element, the
  46   // browser should call this function to grant the child process the capability
  47   // to upload the file to the web. Grants FILE_PERMISSION_READ_ONLY.
  48   virtual void GrantReadFile(int child_id, const base::FilePath& file) = 0;
  49
  50   // This permission grants creation, read, and full write access to a file,
  51   // including attributes.
  52   virtual void GrantCreateReadWriteFile(int child_id,
  53                                         const base::FilePath& file) = 0;
  54
  55   // This permission grants copy-into permission for |dir|.
  56   virtual void GrantCopyInto(int child_id, const base::FilePath& dir) = 0;
  57
  58   // This permission grants delete permission for |dir|.
  59   virtual void GrantDeleteFrom(int child_id, const base::FilePath& dir) = 0;
  60
  61   // These methods verify whether or not the child process has been granted
  62   // permissions perform these functions on |file|.
  63
  64   // Before servicing a child process's request to upload a file to the web, the
  65   // browser should call this method to determine whether the process has the
  66   // capability to upload the requested file.
  67   virtual bool CanReadFile(int child_id, const base::FilePath& file) = 0;
  68   virtual bool CanCreateReadWriteFile(int child_id,
  69                                       const base::FilePath& file) = 0;
  70
  71   // Grants read access permission to the given isolated file system
  72   // identified by |filesystem_id|. An isolated file system can be
  73   // created for a set of native files/directories (like dropped files)
  74   // using storage::IsolatedContext. A child process needs to be granted
  75   // permission to the file system to access the files in it using
  76   // file system URL. You do NOT need to give direct permission to
  77   // individual file paths.
  78   //
  79   // Note: files/directories in the same file system share the same
  80   // permission as far as they are accessed via the file system, i.e.
  81   // using the file system URL (tip: you can create a new file system
  82   // to give different permission to part of files).
  83   virtual void GrantReadFileSystem(int child_id,
  84                                    const std::string& filesystem_id) = 0;
  85
  86   // Grants write access permission to the given isolated file system
  87   // identified by |filesystem_id|.  See comments for GrantReadFileSystem
  88   // for more details.  You do NOT need to give direct permission to
  89   // individual file paths.
  90   //
  91   // This must be called with a great care as this gives write permission
  92   // to all files/directories included in the file system.
  93   virtual void GrantWriteFileSystem(int child_id,
  94                                     const std::string& filesystem_id) = 0;
  95
  96   // Grants create file permission to the given isolated file system
  97   // identified by |filesystem_id|.  See comments for GrantReadFileSystem
  98   // for more details.  You do NOT need to give direct permission to
  99   // individual file paths.
 100   //
 101   // This must be called with a great care as this gives create permission
 102   // within all directories included in the file system.
 103   virtual void GrantCreateFileForFileSystem(
 104       int child_id,
 105       const std::string& filesystem_id) = 0;
 106
 107   // Grants create, read and write access permissions to the given isolated
 108   // file system identified by |filesystem_id|.  See comments for
 109   // GrantReadFileSystem for more details.  You do NOT need to give direct
 110   // permission to individual file paths.
 111   //
 112   // This must be called with a great care as this gives create, read and write
 113   // permissions to all files/directories included in the file system.
 114   virtual void GrantCreateReadWriteFileSystem(
 115       int child_id,
 116       const std::string& filesystem_id) = 0;
 117
 118   // Grants permission to copy-into filesystem |filesystem_id|. 'copy-into'
 119   // is used to allow copying files into the destination filesystem without
 120   // granting more general create and write permissions.
 121   virtual void GrantCopyIntoFileSystem(int child_id,
 122                                        const std::string& filesystem_id) = 0;
 123
 124   // Grants permission to delete from filesystem |filesystem_id|. 'delete-from'
 125   // is used to allow deleting files into the destination filesystem without
 126   // granting more general create and write permissions.
 127   virtual void GrantDeleteFromFileSystem(int child_id,
 128                                          const std::string& filesystem_id) = 0;
 129
 130   // Grants the child process the capability to access URLs of the provided
 131   // scheme.
 132   virtual void GrantScheme(int child_id, const std::string& scheme) = 0;
 133
 134   // Returns true if read access has been granted to |filesystem_id|.
 135   virtual bool CanReadFileSystem(int child_id,
 136                                  const std::string& filesystem_id) = 0;
 137
 138   // Returns true if read and write access has been granted to |filesystem_id|.
 139   virtual bool CanReadWriteFileSystem(int child_id,
 140                                       const std::string& filesystem_id) = 0;
 141
 142   // Returns true if copy-into access has been granted to |filesystem_id|.
 143   virtual bool CanCopyIntoFileSystem(int child_id,
 144                                      const std::string& filesystem_id) = 0;
 145
 146   // Returns true if delete-from access has been granted to |filesystem_id|.
 147   virtual bool CanDeleteFromFileSystem(int child_id,
 148                                        const std::string& filesystem_id) = 0;
 149
 150   // Returns true if the specified child_id has been granted WebUI bindings.
 151   // The browser should check this property before assuming the child process
 152   // is allowed to use WebUI bindings.
 153   virtual bool HasWebUIBindings(int child_id) = 0;
 154
 155   // Grants permission to send system exclusive message to any MIDI devices.
 156   virtual void GrantSendMidiSysExMessage(int child_id) = 0;
 157
 158   // Returns true if the process is permitted to read and modify the data for
 159   // the given origin. This is currently used for cookies and passwords.
 160   // Does not affect cookies attached to or set by network requests.
 161   // Only might return false if the --site-per-process flag is used.
 162   virtual bool CanAccessDataForOrigin(int child_id, const GURL& gurl) = 0;
 163 };
 164
 165 }  // namespace content
 166
 167 #endif  // CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_