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 20 #if defined(__cplusplus) 21 extern "C" { 22 #endif 23 24 // ChaCha20. 25 // 26 // ChaCha20 is a stream cipher. See https://tools.ietf.org/html/rfc7539. 27 28 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|. 32 OPENSSL_EXPORT void CRYPTO_chacha_20(uint8_t *out, const uint8_t *in, 33 size_t in_len, const uint8_t key[32], 34 const uint8_t nonce[12], uint32_t counter); 35 36 37 #if defined(__cplusplus) 38 } // extern C 39 #endif 40 41 #endif // OPENSSL_HEADER_CHACHA_H 42