OLD | NEW |
| (Empty) |
1 // Copyright 2014 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 "net/quic/crypto/chacha20_poly1305_encrypter.h" | |
6 | |
7 #include <pk11pub.h> | |
8 | |
9 #include "base/logging.h" | |
10 | |
11 using base::StringPiece; | |
12 | |
13 namespace net { | |
14 | |
15 namespace { | |
16 | |
17 const size_t kKeySize = 32; | |
18 const size_t kNoncePrefixSize = 0; | |
19 | |
20 } // namespace | |
21 | |
22 #if defined(USE_NSS) | |
23 | |
24 // System NSS doesn't support ChaCha20+Poly1305 yet. | |
25 | |
26 ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter() | |
27 : AeadBaseEncrypter(CKM_INVALID_MECHANISM, nullptr, kKeySize, | |
28 kAuthTagSize, kNoncePrefixSize) { | |
29 NOTIMPLEMENTED(); | |
30 } | |
31 | |
32 ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {} | |
33 | |
34 // static | |
35 bool ChaCha20Poly1305Encrypter::IsSupported() { | |
36 return false; | |
37 } | |
38 | |
39 void ChaCha20Poly1305Encrypter::FillAeadParams(StringPiece nonce, | |
40 StringPiece associated_data, | |
41 size_t auth_tag_size, | |
42 AeadParams* aead_params) const { | |
43 NOTIMPLEMENTED(); | |
44 } | |
45 | |
46 #else // defined(USE_NSS) | |
47 | |
48 ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter() | |
49 : AeadBaseEncrypter(CKM_NSS_CHACHA20_POLY1305, PK11_Encrypt, kKeySize, | |
50 kAuthTagSize, kNoncePrefixSize) { | |
51 static_assert(kKeySize <= kMaxKeySize, "key size too big"); | |
52 static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize, | |
53 "nonce prefix size too big"); | |
54 } | |
55 | |
56 ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {} | |
57 | |
58 // static | |
59 bool ChaCha20Poly1305Encrypter::IsSupported() { | |
60 return true; | |
61 } | |
62 | |
63 void ChaCha20Poly1305Encrypter::FillAeadParams(StringPiece nonce, | |
64 StringPiece associated_data, | |
65 size_t auth_tag_size, | |
66 AeadParams* aead_params) const { | |
67 aead_params->len = sizeof(aead_params->data.nss_aead_params); | |
68 CK_NSS_AEAD_PARAMS* nss_aead_params = &aead_params->data.nss_aead_params; | |
69 nss_aead_params->pIv = | |
70 reinterpret_cast<CK_BYTE*>(const_cast<char*>(nonce.data())); | |
71 nss_aead_params->ulIvLen = nonce.size(); | |
72 nss_aead_params->pAAD = | |
73 reinterpret_cast<CK_BYTE*>(const_cast<char*>(associated_data.data())); | |
74 nss_aead_params->ulAADLen = associated_data.size(); | |
75 nss_aead_params->ulTagLen = auth_tag_size; | |
76 } | |
77 | |
78 #endif // defined(USE_NSS) | |
79 | |
80 } // namespace net | |
OLD | NEW |