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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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