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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/p256_key_exchange.h" | 5 #include "net/quic/crypto/p256_key_exchange.h" |
| 6 | 6 |
| 7 #include <openssl/ec.h> | 7 #include <openssl/ec.h> |
| 8 #include <openssl/ecdh.h> | 8 #include <openssl/ecdh.h> |
| 9 #include <openssl/evp.h> | 9 #include <openssl/evp.h> |
| 10 | 10 |
| 11 #include "base/logging.h" | 11 #include "base/logging.h" |
| 12 | 12 |
| 13 using base::StringPiece; | 13 using base::StringPiece; |
| 14 using std::string; | 14 using std::string; |
| 15 | 15 |
| 16 namespace net { | 16 namespace net { |
| 17 | 17 |
| 18 P256KeyExchange::P256KeyExchange(EC_KEY* private_key, const uint8* public_key) | 18 P256KeyExchange::P256KeyExchange(EC_KEY* private_key, const uint8* public_key) |
| 19 : private_key_(private_key) { | 19 : private_key_(private_key) { |
| 20 memcpy(public_key_, public_key, sizeof(public_key_)); | 20 memcpy(public_key_, public_key, sizeof(public_key_)); |
| 21 } | 21 } |
| 22 | 22 |
| 23 P256KeyExchange::~P256KeyExchange() {} | 23 P256KeyExchange::~P256KeyExchange() { |
| 24 } |
| 24 | 25 |
| 25 // static | 26 // static |
| 26 P256KeyExchange* P256KeyExchange::New(StringPiece key) { | 27 P256KeyExchange* P256KeyExchange::New(StringPiece key) { |
| 27 if (key.empty()) { | 28 if (key.empty()) { |
| 28 DVLOG(1) << "Private key is empty"; | 29 DVLOG(1) << "Private key is empty"; |
| 29 return NULL; | 30 return NULL; |
| 30 } | 31 } |
| 31 | 32 |
| 32 const uint8* keyp = reinterpret_cast<const uint8*>(key.data()); | 33 const uint8* keyp = reinterpret_cast<const uint8*>(key.data()); |
| 33 crypto::ScopedOpenSSL<EC_KEY, EC_KEY_free> private_key( | 34 crypto::ScopedOpenSSL<EC_KEY, EC_KEY_free> private_key( |
| 34 d2i_ECPrivateKey(NULL, &keyp, key.size())); | 35 d2i_ECPrivateKey(NULL, &keyp, key.size())); |
| 35 if (!private_key.get() || !EC_KEY_check_key(private_key.get())) { | 36 if (!private_key.get() || !EC_KEY_check_key(private_key.get())) { |
| 36 DVLOG(1) << "Private key is invalid."; | 37 DVLOG(1) << "Private key is invalid."; |
| 37 return NULL; | 38 return NULL; |
| 38 } | 39 } |
| 39 | 40 |
| 40 uint8 public_key[kUncompressedP256PointBytes]; | 41 uint8 public_key[kUncompressedP256PointBytes]; |
| 41 if (EC_POINT_point2oct(EC_KEY_get0_group(private_key.get()), | 42 if (EC_POINT_point2oct(EC_KEY_get0_group(private_key.get()), |
| 42 EC_KEY_get0_public_key(private_key.get()), | 43 EC_KEY_get0_public_key(private_key.get()), |
| 43 POINT_CONVERSION_UNCOMPRESSED, public_key, | 44 POINT_CONVERSION_UNCOMPRESSED, |
| 44 sizeof(public_key), NULL) != sizeof(public_key)) { | 45 public_key, |
| 46 sizeof(public_key), |
| 47 NULL) != sizeof(public_key)) { |
| 45 DVLOG(1) << "Can't get public key."; | 48 DVLOG(1) << "Can't get public key."; |
| 46 return NULL; | 49 return NULL; |
| 47 } | 50 } |
| 48 | 51 |
| 49 return new P256KeyExchange(private_key.release(), public_key); | 52 return new P256KeyExchange(private_key.release(), public_key); |
| 50 } | 53 } |
| 51 | 54 |
| 52 // static | 55 // static |
| 53 string P256KeyExchange::NewPrivateKey() { | 56 string P256KeyExchange::NewPrivateKey() { |
| 54 crypto::ScopedOpenSSL<EC_KEY, EC_KEY_free> key( | 57 crypto::ScopedOpenSSL<EC_KEY, EC_KEY_free> key( |
| (...skipping 26 matching lines...) Expand all Loading... |
| 81 bool P256KeyExchange::CalculateSharedKey(const StringPiece& peer_public_value, | 84 bool P256KeyExchange::CalculateSharedKey(const StringPiece& peer_public_value, |
| 82 string* out_result) const { | 85 string* out_result) const { |
| 83 if (peer_public_value.size() != kUncompressedP256PointBytes) { | 86 if (peer_public_value.size() != kUncompressedP256PointBytes) { |
| 84 DVLOG(1) << "Peer public value is invalid"; | 87 DVLOG(1) << "Peer public value is invalid"; |
| 85 return false; | 88 return false; |
| 86 } | 89 } |
| 87 | 90 |
| 88 crypto::ScopedOpenSSL<EC_POINT, EC_POINT_free> point( | 91 crypto::ScopedOpenSSL<EC_POINT, EC_POINT_free> point( |
| 89 EC_POINT_new(EC_KEY_get0_group(private_key_.get()))); | 92 EC_POINT_new(EC_KEY_get0_group(private_key_.get()))); |
| 90 if (!point.get() || | 93 if (!point.get() || |
| 91 !EC_POINT_oct2point( /* also test if point is on curve */ | 94 !EC_POINT_oct2point(/* also test if point is on curve */ |
| 92 EC_KEY_get0_group(private_key_.get()), | 95 EC_KEY_get0_group(private_key_.get()), |
| 93 point.get(), | 96 point.get(), |
| 94 reinterpret_cast<const uint8*>(peer_public_value.data()), | 97 reinterpret_cast<const uint8*>( |
| 95 peer_public_value.size(), NULL)) { | 98 peer_public_value.data()), |
| 99 peer_public_value.size(), |
| 100 NULL)) { |
| 96 DVLOG(1) << "Can't convert peer public value to curve point."; | 101 DVLOG(1) << "Can't convert peer public value to curve point."; |
| 97 return false; | 102 return false; |
| 98 } | 103 } |
| 99 | 104 |
| 100 uint8 result[kP256FieldBytes]; | 105 uint8 result[kP256FieldBytes]; |
| 101 if (ECDH_compute_key(result, sizeof(result), point.get(), private_key_.get(), | 106 if (ECDH_compute_key( |
| 102 NULL) != sizeof(result)) { | 107 result, sizeof(result), point.get(), private_key_.get(), NULL) != |
| 108 sizeof(result)) { |
| 103 DVLOG(1) << "Can't compute ECDH shared key."; | 109 DVLOG(1) << "Can't compute ECDH shared key."; |
| 104 return false; | 110 return false; |
| 105 } | 111 } |
| 106 | 112 |
| 107 out_result->assign(reinterpret_cast<char*>(result), sizeof(result)); | 113 out_result->assign(reinterpret_cast<char*>(result), sizeof(result)); |
| 108 return true; | 114 return true; |
| 109 } | 115 } |
| 110 | 116 |
| 111 StringPiece P256KeyExchange::public_value() const { | 117 StringPiece P256KeyExchange::public_value() const { |
| 112 return StringPiece(reinterpret_cast<const char*>(public_key_), | 118 return StringPiece(reinterpret_cast<const char*>(public_key_), |
| 113 sizeof(public_key_)); | 119 sizeof(public_key_)); |
| 114 } | 120 } |
| 115 | 121 |
| 116 QuicTag P256KeyExchange::tag() const { return kP256; } | 122 QuicTag P256KeyExchange::tag() const { |
| 123 return kP256; |
| 124 } |
| 117 | 125 |
| 118 } // namespace net | 126 } // namespace net |
| 119 | |
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