ref: e86bd6a50933e99899d63de755d81b9805827a15
dir: /third_party/boringssl/src/crypto/hrss/internal.h/
/* Copyright (c) 2018, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#ifndef OPENSSL_HEADER_HRSS_INTERNAL_H
#define OPENSSL_HEADER_HRSS_INTERNAL_H
#include <openssl/base.h>
#include "../internal.h"
#if defined(__cplusplus)
extern "C" {
#endif
#define N 701
#define BITS_PER_WORD (sizeof(crypto_word_t) * 8)
#define WORDS_PER_POLY ((N + BITS_PER_WORD - 1) / BITS_PER_WORD)
#define BITS_IN_LAST_WORD (N % BITS_PER_WORD)
struct poly2 {
crypto_word_t v[WORDS_PER_POLY];
};
struct poly3 {
struct poly2 s, a;
};
OPENSSL_EXPORT void HRSS_poly3_mul(struct poly3 *out, const struct poly3 *x,
const struct poly3 *y);
OPENSSL_EXPORT void HRSS_poly3_invert(struct poly3 *out,
const struct poly3 *in);
// On x86-64, we can use the AVX2 code from [HRSS]. (The authors have given
// explicit permission for this and signed a CLA.) However it's 57KB of object
// code, so it's not used if |OPENSSL_SMALL| is defined.
#if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_SMALL) && \
defined(OPENSSL_X86_64) && defined(OPENSSL_LINUX)
#define POLY_RQ_MUL_ASM
// POLY_MUL_RQ_SCRATCH_SPACE is the number of bytes of scratch space needed
// by the assembly function poly_Rq_mul.
#define POLY_MUL_RQ_SCRATCH_SPACE (6144 + 6144 + 12288 + 512 + 9408 + 32)
// poly_Rq_mul is defined in assembly. Inputs and outputs must be 16-byte-
// aligned.
extern void poly_Rq_mul(
uint16_t r[N + 3], const uint16_t a[N + 3], const uint16_t b[N + 3],
// The following should be `scratch[POLY_MUL_RQ_SCRATCH_SPACE]` but
// GCC 11.1 has a bug with unions that breaks that.
uint8_t scratch[]);
#endif
#if defined(__cplusplus)
} // extern "C"
#endif
#endif // !OPENSSL_HEADER_HRSS_INTERNAL_H