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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 | |
10 #include "crypto/random.h" | 7 #include "crypto/random.h" |
11 #endif | |
12 | 8 |
13 namespace IPC { | 9 namespace IPC { |
14 | 10 |
15 #if USE_ATTACHMENT_BROKER | 11 namespace { |
16 BrokerableAttachment::AttachmentId::AttachmentId() { | |
17 // In order to prevent mutually untrusted processes from stealing resources | |
18 // from one another, the nonce must be secret. This generates a 128-bit, | |
19 // cryptographicaly-strong random number. | |
20 crypto::RandBytes(nonce, BrokerableAttachment::kNonceSize); | |
21 } | |
22 #else | |
23 BrokerableAttachment::AttachmentId::AttachmentId() { | |
24 CHECK(false) << "Not allowed to construct an attachment id if the platform " | |
25 "does not support attachment brokering."; | |
26 } | |
27 #endif | |
28 | 12 |
29 BrokerableAttachment::AttachmentId::AttachmentId(const char* start_address, | 13 // In order to prevent mutually untrusted processes from stealing resources from |
30 size_t size) { | 14 // one another, the nonce must be secret. This generates a 128-bit, |
31 DCHECK(size == BrokerableAttachment::kNonceSize); | 15 // cryptographicaly-strong random number. |
32 for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i) | 16 BrokerableAttachment::AttachmentId GetRandomId() { |
33 nonce[i] = start_address[i]; | 17 BrokerableAttachment::AttachmentId id; |
| 18 crypto::RandBytes(id.nonce, BrokerableAttachment::kNonceSize); |
| 19 return id; |
34 } | 20 } |
35 | 21 |
36 void BrokerableAttachment::AttachmentId::SerializeToBuffer(char* start_address, | 22 } // namespace |
37 size_t size) { | 23 |
38 DCHECK(size == BrokerableAttachment::kNonceSize); | 24 BrokerableAttachment::BrokerableAttachment() |
39 for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i) | 25 : id_(GetRandomId()), needs_brokering_(false) {} |
40 start_address[i] = nonce[i]; | 26 |
| 27 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id, |
| 28 bool needs_brokering) |
| 29 : id_(id), needs_brokering_(needs_brokering) {} |
| 30 |
| 31 BrokerableAttachment::~BrokerableAttachment() { |
41 } | 32 } |
42 | 33 |
43 BrokerableAttachment::BrokerableAttachment() {} | |
44 | |
45 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id) : id_(id) {} | |
46 | |
47 BrokerableAttachment::~BrokerableAttachment() {} | |
48 | |
49 BrokerableAttachment::AttachmentId BrokerableAttachment::GetIdentifier() const { | 34 BrokerableAttachment::AttachmentId BrokerableAttachment::GetIdentifier() const { |
50 return id_; | 35 return id_; |
51 } | 36 } |
52 | 37 |
53 bool BrokerableAttachment::NeedsBrokering() const { | 38 bool BrokerableAttachment::NeedsBrokering() const { |
54 return GetBrokerableType() == PLACEHOLDER; | 39 return needs_brokering_; |
| 40 } |
| 41 |
| 42 void BrokerableAttachment::SetNeedsBrokering(bool needs_brokering) { |
| 43 needs_brokering_ = needs_brokering; |
55 } | 44 } |
56 | 45 |
57 BrokerableAttachment::Type BrokerableAttachment::GetType() const { | 46 BrokerableAttachment::Type BrokerableAttachment::GetType() const { |
58 return TYPE_BROKERABLE_ATTACHMENT; | 47 return TYPE_BROKERABLE_ATTACHMENT; |
59 } | 48 } |
60 | 49 |
61 #if defined(OS_POSIX) | |
62 base::PlatformFile BrokerableAttachment::TakePlatformFile() { | |
63 NOTREACHED(); | |
64 return base::PlatformFile(); | |
65 } | |
66 #endif // OS_POSIX | |
67 | |
68 } // namespace IPC | 50 } // namespace IPC |
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