48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
|
|
* Copyright (C) 2014 FH Bielefeld
|
|
*
|
|
* This file is part of a FH Bielefeld project.
|
|
*
|
|
* This library 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.
|
|
*
|
|
* This library 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 library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file encrypt.c
|
|
* This file handles the NTRU encryption
|
|
* algorithm.
|
|
* @brief NTRU encryption
|
|
*/
|
|
|
|
#include "encrypt.h"
|
|
|
|
#include <fmpz_poly.h>
|
|
#include <fmpz.h>
|
|
|
|
|
|
void
|
|
ntru_encrypt_poly(
|
|
fmpz_poly_t msg,
|
|
fmpz_poly_t pub_key,
|
|
fmpz_poly_t rnd,
|
|
fmpz_poly_t out,
|
|
ntru_context *ctx)
|
|
{
|
|
fmpz_poly_zero(out);
|
|
poly_starmultiply(pub_key, rnd, out, ctx, ctx->q);
|
|
fmpz_poly_add(out, out, msg);
|
|
fmpz_poly_mod_unsigned(out, ctx->q);
|
|
}
|