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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 "crypto/curve25519.h" | 5 #include "crypto/curve25519.h" |
| 6 | 6 |
| 7 #include <stdint.h> |
| 8 |
| 7 #include "crypto/secure_util.h" | 9 #include "crypto/secure_util.h" |
| 8 | 10 |
| 9 // Curve25519 is specified in terms of byte strings, not numbers, so all | 11 // Curve25519 is specified in terms of byte strings, not numbers, so all |
| 10 // implementations take and return the same sequence of bits. So the byte | 12 // implementations take and return the same sequence of bits. So the byte |
| 11 // order is implicitly specified as in, say, SHA1. | 13 // order is implicitly specified as in, say, SHA1. |
| 12 // | 14 // |
| 13 // Prototype for |curve25519_donna| function in | 15 // Prototype for |curve25519_donna| function in |
| 14 // third_party/curve25519-donna/curve25519-donna.c | 16 // third_party/curve25519-donna/curve25519-donna.c |
| 15 extern "C" int curve25519_donna(uint8_t*, const uint8_t*, const uint8_t*); | 17 extern "C" int curve25519_donna(uint8_t*, const uint8_t*, const uint8_t*); |
| 16 | 18 |
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| 33 // See "Computing public keys" section of http://cr.yp.to/ecdh.html. | 35 // See "Computing public keys" section of http://cr.yp.to/ecdh.html. |
| 34 static const uint8_t kBasePoint[32] = {9}; | 36 static const uint8_t kBasePoint[32] = {9}; |
| 35 | 37 |
| 36 void ScalarBaseMult(const uint8_t* private_key, uint8_t* public_key) { | 38 void ScalarBaseMult(const uint8_t* private_key, uint8_t* public_key) { |
| 37 curve25519_donna(public_key, private_key, kBasePoint); | 39 curve25519_donna(public_key, private_key, kBasePoint); |
| 38 } | 40 } |
| 39 | 41 |
| 40 } // namespace curve25519 | 42 } // namespace curve25519 |
| 41 | 43 |
| 42 } // namespace crypto | 44 } // namespace crypto |
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