1 /* $OpenBSD: cipher-chachapoly.h,v 1.4 2014/06/24 01:13:21 djm Exp $ */ 2 3 /* 4 * Copyright (c) Damien Miller 2013 <djm (at) mindrot.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 #ifndef CHACHA_POLY_AEAD_H 19 #define CHACHA_POLY_AEAD_H 20 21 #include <sys/types.h> 22 #include "chacha.h" 23 #include "poly1305.h" 24 25 #define CHACHA_KEYLEN 32 /* Only 256 bit keys used here */ 26 27 struct chachapoly_ctx { 28 struct chacha_ctx main_ctx, header_ctx; 29 }; 30 31 int chachapoly_init(struct chachapoly_ctx *cpctx, 32 const u_char *key, u_int keylen) 33 __attribute__((__bounded__(__buffer__, 2, 3))); 34 int chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr, 35 u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen, 36 int do_encrypt); 37 int chachapoly_get_length(struct chachapoly_ctx *cpctx, 38 u_int *plenp, u_int seqnr, const u_char *cp, u_int len) 39 __attribute__((__bounded__(__buffer__, 4, 5))); 40 41 #endif /* CHACHA_POLY_AEAD_H */ 42
