81 lines
2.3 KiB
C
81 lines
2.3 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 decrypt.h
|
|
* Header for the external API of decrypt.c.
|
|
* @brief header for decrypt.c
|
|
*/
|
|
|
|
#ifndef NTRU_DECRYPT_H
|
|
#define NTRU_DECRYPT_H
|
|
|
|
#include "ntru_string.h"
|
|
#include "params.h"
|
|
#include "poly.h"
|
|
|
|
#include <stdbool.h>
|
|
|
|
#include <fmpz_poly.h>
|
|
#include <fmpz.h>
|
|
|
|
|
|
/**
|
|
* Decryption of the given Polynom with the private key, its inverse
|
|
* and the fitting ntru_params
|
|
*
|
|
* @param encr_msg encrypted polynom with maximum length of N from
|
|
* the given context
|
|
* @param priv_key the polynom containing the private key to decrypt
|
|
* the message
|
|
* @param priv_key_inv the inverse polynome to the private key
|
|
* @param out_tern the resulting ternary polynom [out]
|
|
* @param params the ntru_params
|
|
* @return true/false for success/failure
|
|
*/
|
|
bool
|
|
ntru_decrypt_poly(
|
|
const fmpz_poly_t encr_msg,
|
|
const fmpz_poly_t priv_key,
|
|
const fmpz_poly_t priv_key_inv,
|
|
fmpz_poly_t out_tern,
|
|
const ntru_params *params);
|
|
|
|
/**
|
|
* Decryption of a given encrypted string.
|
|
*
|
|
* @param encr_msg the encrypted message in the form of a string
|
|
* @param priv_key the polynom containing the private key to decrypt
|
|
* the message
|
|
* @param priv_key_inv the inverse polynome to the private key
|
|
* @param params the ntru_params
|
|
* @return the decrypted string or NULL on failure
|
|
*/
|
|
string *
|
|
ntru_decrypt_string(
|
|
const string *encr_msg,
|
|
const fmpz_poly_t priv_key,
|
|
const fmpz_poly_t priv_key_inv,
|
|
const ntru_params *params);
|
|
|
|
|
|
#endif /* NTRU_DECRYPT */
|