1 /* $OpenBSD: chacha.h,v 1.5 2014/06/24 18:12:09 jsing Exp $ */ 2 /* 3 * Copyright (c) Joel Sing <jsing@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef HEADER_CHACHA_H 19 #define HEADER_CHACHA_H 20 21 #include <openssl/opensslconf.h> 22 23 #if defined(OPENSSL_NO_CHACHA) 24 #error ChaCha is disabled. 25 #endif 26 27 #include <stddef.h> 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 typedef struct { 34 unsigned int input[16]; 35 unsigned char ks[64]; 36 unsigned char unused; 37 } ChaCha_ctx; 38 39 void ChaCha_set_key(ChaCha_ctx *ctx, const unsigned char *key, 40 unsigned int keybits); 41 void ChaCha_set_iv(ChaCha_ctx *ctx, const unsigned char *iv, 42 const unsigned char *counter); 43 void ChaCha(ChaCha_ctx *ctx, unsigned char *out, const unsigned char *in, 44 size_t len); 45 46 void CRYPTO_chacha_20(unsigned char *out, const unsigned char *in, size_t len, 47 const unsigned char key[32], const unsigned char iv[8], size_t counter); 48 49 #ifdef __cplusplus 50 } 51 #endif 52 53 #endif /* HEADER_CHACHA_H */ 54