ipc/brokerable_attachment.cc

   1 // Copyright 2015 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 "ipc/brokerable_attachment.h"
   6
   7 #include "crypto/random.h"
   8
   9 namespace IPC {
  10
  11 namespace {
  12
  13 // In order to prevent mutually untrusted processes from stealing resources from
  14 // one another, the nonce must be secret. This generates a 128-bit,
  15 // cryptographicaly-strong random number.
  16 BrokerableAttachment::AttachmentId GetRandomId() {
  17   BrokerableAttachment::AttachmentId id;
  18   crypto::RandBytes(id.nonce, BrokerableAttachment::kNonceSize);
  19   return id;
  20 }
  21
  22 }  // namespace
  23
  24 BrokerableAttachment::BrokerableAttachment() : id_(GetRandomId()) {
  25 }
  26
  27 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id) : id_(id) {
  28 }
  29
  30 BrokerableAttachment::~BrokerableAttachment() {
  31 }
  32
  33 BrokerableAttachment::AttachmentId BrokerableAttachment::GetIdentifier() const {
  34   return id_;
  35 }
  36
  37 BrokerableAttachment::Type BrokerableAttachment::GetType() const {
  38   return TYPE_BROKERABLE_ATTACHMENT;
  39 }
  40
  41 }  // namespace IPC