92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* Copyright (C) 2014 FH Bielefeld
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*
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* This file is part of a FH Bielefeld project.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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/**
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* @file ntru_ascii_poly.h
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* Header for the internal API of ntru_ascii_poly.c.
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* @brief header for ntru_ascii_poly.c
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*/
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#ifndef NTRU_ASCII_POLY_H_
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#define NTRU_ASCII_POLY_H_
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#include "ntru_common.h"
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#include "ntru_string.h"
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#include "ntru_params.h"
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#include <fmpz_poly.h>
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#include <fmpz.h>
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/**
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* Convert a "binary" ascii string to a binary polyomial.
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* The ascii string will be converted to a binary representation
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* and the following mapping will apply between binary -> poly:
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*
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* 1 => 1
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*
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* 0 => -1
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*
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* @param to_poly the string to get into binary polynomial format
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* @param params the NTRUEncrypt context
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* @return newly allocated array of binary polynomials
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*/
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fmpz_poly_t *
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ascii_bin_to_bin_poly(const char *to_poly, const ntru_params *params);
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/**
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* Convert an ascii string to an array of binary polyomials.
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* The ascii string will be converted to a binary representation
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* and the following mapping will apply between binary -> poly:
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*
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* 1 => 1
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*
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* 0 => -1
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*
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* @param to_poly the string to get into binary polynomial format
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* @param params the NTRUEncrypt context
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* @return newly allocated array of binary polynomials
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*/
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fmpz_poly_t **
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ascii_to_bin_poly_arr(const string *to_poly, const ntru_params *params);
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/**
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* Convert an base64 encoded string to an array of polyomials with
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* coefficients which are expected to be in the range [0, q-1].
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* The chars will be converted (after decoding) to their integer
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* representation and directly put into the coefficients.
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*
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* If the last polynomial is of degree less than N -1, then it will
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* be filled with trailing q's for later user in poly_arr_to_base64().
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*
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* @param to_poly the string to get into polynomial format,
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* which is of type string, so we can iterate safely over it
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* (the string might have null-bytes in the middle of it)
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* @param params the NTRUEncrypt context
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* @return newly allocated array of polynomials
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*/
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fmpz_poly_t **
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base64_to_poly_arr(const string *to_poly, const ntru_params *params);
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#endif /* NTRU_ASCII_POLY_H_ */
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