blob: eb170c0661cb3f19f10a86a500384306bf614fbb [file] [log] [blame]
/* Copyright (c) 2016, 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_NEWHOPE_INTERNAL_H
#define OPENSSL_HEADER_NEWHOPE_INTERNAL_H
#include <openssl/newhope.h>
#include <openssl/sha.h>
#include "../internal.h"
/* The number of polynomial coefficients. */
#define PARAM_N 1024
/* The width the noise distribution. */
#define PARAM_K 16
/* Modulus. */
#define PARAM_Q 12289
/* Polynomial coefficients in unpacked form. */
struct newhope_poly_st {
uint16_t coeffs[PARAM_N];
};
/* SEED_LENGTH is the length of the AES-CTR seed used to derive a polynomial. */
#define SEED_LENGTH 32
/* newhope_poly_uniform generates the polynomial |a| using AES-CTR mode with the
* seed
* |seed|. (In the reference implementation this was done with SHAKE-128.) */
void newhope_poly_uniform(NEWHOPE_POLY* a, const uint8_t* seed);
void newhope_helprec(NEWHOPE_POLY* c, const NEWHOPE_POLY* v,
const uint8_t rbits[32]);
/* newhope_reconcile performs the error-reconciliation step using the input |v|
* and
* reconciliation data |c|, writing the resulting key to |key|. */
void newhope_reconcile(uint8_t* key, const NEWHOPE_POLY* v,
const NEWHOPE_POLY* c);
/* newhope_poly_invntt performs the inverse of NTT(r) in-place. */
void newhope_poly_invntt(NEWHOPE_POLY* r);
void newhope_poly_add(NEWHOPE_POLY* r, const NEWHOPE_POLY* a,
const NEWHOPE_POLY* b);
void newhope_poly_pointwise(NEWHOPE_POLY* r, const NEWHOPE_POLY* a,
const NEWHOPE_POLY* b);
uint16_t newhope_montgomery_reduce(uint32_t a);
uint16_t newhope_barrett_reduce(uint16_t a);
void newhope_bitrev_vector(uint16_t* poly);
void newhope_mul_coefficients(uint16_t* poly, const uint16_t* factors);
void newhope_ntt(uint16_t* poly, const uint16_t* omegas);
#endif /* OPENSSL_HEADER_NEWHOPE_INTERNAL_H */