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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ipc/brokerable_attachment.h" | 5 #include "ipc/brokerable_attachment.h" |
6 | 6 |
| 7 #include "ipc/attachment_broker.h" |
| 8 |
| 9 #if USE_ATTACHMENT_BROKER |
7 #include "crypto/random.h" | 10 #include "crypto/random.h" |
| 11 #endif |
8 | 12 |
9 namespace IPC { | 13 namespace IPC { |
10 | 14 |
11 namespace { | |
12 | 15 |
| 16 #if USE_ATTACHMENT_BROKER |
| 17 BrokerableAttachment::AttachmentId::AttachmentId() { |
13 // In order to prevent mutually untrusted processes from stealing resources from | 18 // In order to prevent mutually untrusted processes from stealing resources from |
14 // one another, the nonce must be secret. This generates a 128-bit, | 19 // one another, the nonce must be secret. This generates a 128-bit, |
15 // cryptographicaly-strong random number. | 20 // cryptographicaly-strong random number. |
16 BrokerableAttachment::AttachmentId GetRandomId() { | 21 crypto::RandBytes(nonce, BrokerableAttachment::kNonceSize); |
17 BrokerableAttachment::AttachmentId id; | 22 } |
18 crypto::RandBytes(id.nonce, BrokerableAttachment::kNonceSize); | 23 #else |
19 return id; | 24 BrokerableAttachment::AttachmentId::AttachmentId() { |
| 25 CHECK(false) << "Not allowed to construct an attachment id if the platform " |
| 26 "does not support attachment brokering."; |
| 27 } |
| 28 #endif |
| 29 |
| 30 BrokerableAttachment::AttachmentId::AttachmentId(const char* start_address, |
| 31 size_t size) { |
| 32 DCHECK(size == BrokerableAttachment::kNonceSize); |
| 33 for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i) |
| 34 nonce[i] = start_address[i]; |
20 } | 35 } |
21 | 36 |
22 } // namespace | 37 void BrokerableAttachment::AttachmentId::SerializeToBuffer(char* start_address, |
| 38 size_t size) { |
| 39 DCHECK(size == BrokerableAttachment::kNonceSize); |
| 40 for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i) |
| 41 start_address[i] = nonce[i]; |
| 42 } |
23 | 43 |
24 BrokerableAttachment::BrokerableAttachment() | 44 BrokerableAttachment::BrokerableAttachment() |
25 : id_(GetRandomId()), needs_brokering_(false) {} | 45 : needs_brokering_(false) {} |
26 | 46 |
27 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id, | 47 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id, |
28 bool needs_brokering) | 48 bool needs_brokering) |
29 : id_(id), needs_brokering_(needs_brokering) {} | 49 : id_(id), needs_brokering_(needs_brokering) {} |
30 | 50 |
31 BrokerableAttachment::~BrokerableAttachment() { | 51 BrokerableAttachment::~BrokerableAttachment() { |
32 } | 52 } |
33 | 53 |
34 BrokerableAttachment::AttachmentId BrokerableAttachment::GetIdentifier() const { | 54 BrokerableAttachment::AttachmentId BrokerableAttachment::GetIdentifier() const { |
35 return id_; | 55 return id_; |
36 } | 56 } |
37 | 57 |
38 bool BrokerableAttachment::NeedsBrokering() const { | 58 bool BrokerableAttachment::NeedsBrokering() const { |
39 return needs_brokering_; | 59 return needs_brokering_; |
40 } | 60 } |
41 | 61 |
42 void BrokerableAttachment::SetNeedsBrokering(bool needs_brokering) { | 62 void BrokerableAttachment::SetNeedsBrokering(bool needs_brokering) { |
43 needs_brokering_ = needs_brokering; | 63 needs_brokering_ = needs_brokering; |
44 } | 64 } |
45 | 65 |
46 BrokerableAttachment::Type BrokerableAttachment::GetType() const { | 66 BrokerableAttachment::Type BrokerableAttachment::GetType() const { |
47 return TYPE_BROKERABLE_ATTACHMENT; | 67 return TYPE_BROKERABLE_ATTACHMENT; |
48 } | 68 } |
49 | 69 |
50 } // namespace IPC | 70 } // namespace IPC |
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