| erikchen | a5085cda | 2015-09-15 17:26:27 | [diff] [blame] | 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 | |
| erikchen | 28299a1 | 2015-09-24 00:10:27 | [diff] [blame] | 11 | // static |
| 12 | BrokerableAttachment::AttachmentId |
| 13 | BrokerableAttachment::AttachmentId::CreateIdWithRandomNonce() { |
| 14 | AttachmentId id; |
| erikchen | a5085cda | 2015-09-15 17:26:27 | [diff] [blame] | 15 | // In order to prevent mutually untrusted processes from stealing resources |
| 16 | // from one another, the nonce must be secret. This generates a 128-bit, |
| 17 | // cryptographicaly-strong random number. |
| erikchen | 28299a1 | 2015-09-24 00:10:27 | [diff] [blame] | 18 | crypto::RandBytes(id.nonce, BrokerableAttachment::kNonceSize); |
| 19 | return id; |
| erikchen | a5085cda | 2015-09-15 17:26:27 | [diff] [blame] | 20 | } |
| 21 | |
| 22 | } // namespace IPC |
