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/* poly1305-internal.h - Poly1305 internals
* Copyright (C) 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser general Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef G10_POLY1305_INTERNAL_H
#define G10_POLY1305_INTERNAL_H
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "types.h"
#include "g10lib.h"
#include "cipher.h"
#include "bufhelp.h"
#define POLY1305_TAGLEN 16
#define POLY1305_KEYLEN 32
#define POLY1305_BLOCKSIZE 16
/* POLY1305_USE_AVX512 indicates whether to compile with Intel AVX512 code. */
#undef POLY1305_USE_AVX512
#if defined(__x86_64__) && defined(HAVE_GCC_INLINE_ASM_AVX512) && \
defined(HAVE_INTEL_SYNTAX_PLATFORM_AS) && \
(defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) || \
defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS))
# define POLY1305_USE_AVX512 1
#endif
/* POLY1305_USE_PPC_VEC indicates whether to enable PowerPC vector code. */
#undef POLY1305_USE_PPC_VEC
#ifdef ENABLE_PPC_CRYPTO_SUPPORT
# if defined(HAVE_COMPATIBLE_CC_PPC_ALTIVEC) && \
defined(HAVE_GCC_INLINE_ASM_PPC_ALTIVEC) && \
!defined(WORDS_BIGENDIAN)
# if __GNUC__ >= 4
# define POLY1305_USE_PPC_VEC 1
# endif
# endif
#endif
typedef struct
{
u32 k[4];
u32 r[4];
u32 h[5];
} POLY1305_STATE;
typedef struct poly1305_context_s
{
POLY1305_STATE state;
byte buffer[POLY1305_BLOCKSIZE];
unsigned int leftover;
#ifdef POLY1305_USE_AVX512
unsigned int use_avx512:1;
#endif
#ifdef POLY1305_USE_PPC_VEC
unsigned int use_p10:1;
#endif
} poly1305_context_t;
gcry_err_code_t _gcry_poly1305_init (poly1305_context_t *ctx, const byte *key,
size_t keylen);
void _gcry_poly1305_finish (poly1305_context_t *ctx,
byte mac[POLY1305_TAGLEN]);
void _gcry_poly1305_update (poly1305_context_t *ctx, const byte *buf,
size_t buflen);
unsigned int _gcry_poly1305_update_burn (poly1305_context_t *ctx,
const byte *m, size_t bytes);
#endif /* G10_POLY1305_INTERNAL_H */
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