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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 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 "net/quic/crypto/curve25519_key_exchange.h" | 5 #include "net/quic/crypto/curve25519_key_exchange.h" |
6 | 6 |
7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "crypto/curve25519.h" | 9 #include "crypto/curve25519.h" |
10 #include "net/quic/crypto/quic_random.h" | 10 #include "net/quic/crypto/quic_random.h" |
11 | 11 |
12 using base::StringPiece; | 12 using base::StringPiece; |
13 using std::string; | 13 using std::string; |
14 | 14 |
15 namespace net { | 15 namespace net { |
16 | 16 |
17 Curve25519KeyExchange::Curve25519KeyExchange() {} | 17 Curve25519KeyExchange::Curve25519KeyExchange() { |
| 18 } |
18 | 19 |
19 Curve25519KeyExchange::~Curve25519KeyExchange() {} | 20 Curve25519KeyExchange::~Curve25519KeyExchange() { |
| 21 } |
20 | 22 |
21 // static | 23 // static |
22 Curve25519KeyExchange* Curve25519KeyExchange::New( | 24 Curve25519KeyExchange* Curve25519KeyExchange::New( |
23 const StringPiece& private_key) { | 25 const StringPiece& private_key) { |
24 Curve25519KeyExchange* ka; | 26 Curve25519KeyExchange* ka; |
25 // We don't want to #include the NaCl headers in the public header file, so | 27 // We don't want to #include the NaCl headers in the public header file, so |
26 // we use literals for the sizes of private_key_ and public_key_. Here we | 28 // we use literals for the sizes of private_key_ and public_key_. Here we |
27 // assert that those values are equal to the values from the NaCl header. | 29 // assert that those values are equal to the values from the NaCl header. |
28 COMPILE_ASSERT( | 30 COMPILE_ASSERT(sizeof(ka->private_key_) == crypto::curve25519::kScalarBytes, |
29 sizeof(ka->private_key_) == crypto::curve25519::kScalarBytes, | 31 header_out_of_sync); |
30 header_out_of_sync); | |
31 COMPILE_ASSERT(sizeof(ka->public_key_) == crypto::curve25519::kBytes, | 32 COMPILE_ASSERT(sizeof(ka->public_key_) == crypto::curve25519::kBytes, |
32 header_out_of_sync); | 33 header_out_of_sync); |
33 | 34 |
34 if (private_key.size() != crypto::curve25519::kScalarBytes) { | 35 if (private_key.size() != crypto::curve25519::kScalarBytes) { |
35 return NULL; | 36 return NULL; |
36 } | 37 } |
37 | 38 |
38 ka = new Curve25519KeyExchange(); | 39 ka = new Curve25519KeyExchange(); |
39 memcpy(ka->private_key_, private_key.data(), | 40 memcpy( |
40 crypto::curve25519::kScalarBytes); | 41 ka->private_key_, private_key.data(), crypto::curve25519::kScalarBytes); |
41 crypto::curve25519::ScalarBaseMult(ka->private_key_, ka->public_key_); | 42 crypto::curve25519::ScalarBaseMult(ka->private_key_, ka->public_key_); |
42 return ka; | 43 return ka; |
43 } | 44 } |
44 | 45 |
45 // static | 46 // static |
46 string Curve25519KeyExchange::NewPrivateKey(QuicRandom* rand) { | 47 string Curve25519KeyExchange::NewPrivateKey(QuicRandom* rand) { |
47 uint8 private_key[crypto::curve25519::kScalarBytes]; | 48 uint8 private_key[crypto::curve25519::kScalarBytes]; |
48 rand->RandBytes(private_key, sizeof(private_key)); | 49 rand->RandBytes(private_key, sizeof(private_key)); |
49 | 50 |
50 // This makes |private_key| a valid scalar, as specified on | 51 // This makes |private_key| a valid scalar, as specified on |
(...skipping 24 matching lines...) Expand all Loading... |
75 out_result->assign(reinterpret_cast<char*>(result), sizeof(result)); | 76 out_result->assign(reinterpret_cast<char*>(result), sizeof(result)); |
76 | 77 |
77 return true; | 78 return true; |
78 } | 79 } |
79 | 80 |
80 StringPiece Curve25519KeyExchange::public_value() const { | 81 StringPiece Curve25519KeyExchange::public_value() const { |
81 return StringPiece(reinterpret_cast<const char*>(public_key_), | 82 return StringPiece(reinterpret_cast<const char*>(public_key_), |
82 sizeof(public_key_)); | 83 sizeof(public_key_)); |
83 } | 84 } |
84 | 85 |
85 QuicTag Curve25519KeyExchange::tag() const { return kC255; } | 86 QuicTag Curve25519KeyExchange::tag() const { |
| 87 return kC255; |
| 88 } |
86 | 89 |
87 } // namespace net | 90 } // namespace net |
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