Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2014, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #ifndef OPENSSL_HEADER_CHACHA_H |
| 16 | #define OPENSSL_HEADER_CHACHA_H |
| 17 | |
| 18 | #include <openssl/base.h> |
| 19 | |
Robert Sloan | 921ef2c | 2017-10-17 09:02:20 -0700 | [diff] [blame^] | 20 | #if defined(__cplusplus) |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 21 | extern "C" { |
| 22 | #endif |
| 23 | |
Robert Sloan | 921ef2c | 2017-10-17 09:02:20 -0700 | [diff] [blame^] | 24 | // ChaCha20. |
| 25 | // |
| 26 | // ChaCha20 is a stream cipher. See https://tools.ietf.org/html/rfc7539. |
| 27 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 28 | |
Robert Sloan | 8f860b1 | 2017-08-28 07:37:06 -0700 | [diff] [blame] | 29 | // CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and |
| 30 | // nonce and writes the result to |out|. If |in| and |out| alias, they must be |
| 31 | // equal. The initial block counter is specified by |counter|. |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 32 | OPENSSL_EXPORT void CRYPTO_chacha_20(uint8_t *out, const uint8_t *in, |
| 33 | size_t in_len, const uint8_t key[32], |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 34 | const uint8_t nonce[12], uint32_t counter); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 35 | |
| 36 | |
| 37 | #if defined(__cplusplus) |
Robert Sloan | 8f860b1 | 2017-08-28 07:37:06 -0700 | [diff] [blame] | 38 | } // extern C |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 39 | #endif |
| 40 | |
Robert Sloan | 8f860b1 | 2017-08-28 07:37:06 -0700 | [diff] [blame] | 41 | #endif // OPENSSL_HEADER_CHACHA_H |