crypto/openssh/cipher-chachapoly.h

   1 /* $OpenBSD: cipher-chachapoly.h,v 1.5 2020/04/03 04:27:03 djm Exp $ */
   2
   3 /*
   4  * Copyright (c) Damien Miller 2013 <djm@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
  29 struct chachapoly_ctx *chachapoly_new(const u_char *key, u_int keylen)
  30     __attribute__((__bounded__(__buffer__, 1, 2)));
  31 void chachapoly_free(struct chachapoly_ctx *cpctx);
  32
  33 int     chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr,
  34     u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen,
  35     int do_encrypt);
  36 int     chachapoly_get_length(struct chachapoly_ctx *cpctx,
  37     u_int *plenp, u_int seqnr, const u_char *cp, u_int len)
  38     __attribute__((__bounded__(__buffer__, 4, 5)));
  39
  40 #endif /* CHACHA_POLY_AEAD_H */