ntru_ascii_poly.c File Reference

ascii to polynomials More...

#include "ntru_ascii_poly.h"
#include "ntru_common.h"
#include "ntru_mem.h"
#include "ntru_params.h"
#include "ntru_poly.h"
#include "ntru_string.h"
#include <glib.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fmpz_poly.h>
#include <fmpz.h>

Include dependency graph for ntru_ascii_poly.c:

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Functions
static char *	get_int_to_bin_str (uint8_t value)
fmpz_poly_t *	ascii_bin_to_bin_poly (const char *to_poly, const ntru_params *params)
fmpz_poly_t **	ascii_to_bin_poly_arr (const string *to_poly, const ntru_params *params)
fmpz_poly_t **	base64_to_poly_arr (const string *to_poly, const ntru_params *params)

Detailed Description

ascii to polynomials

This file allows to convert ascii strings, including base64 encoded ones, to polynomials.

Definition in file ntru_ascii_poly.c.

Function Documentation

fmpz_poly_t* ascii_bin_to_bin_poly	(	const char *	to_poly,
		const ntru_params *	params
	)

Convert a "binary" ascii string to a binary polyomial. The ascii string will be converted to a binary representation and the following mapping will apply between binary -> poly:

1 => 1

0 => -1

If the polynomial is of degree less than N -1, then it will be filled with trailing 2's for later use in bin_poly_to_ascii().

Parameters

to_poly	the string to get into binary polynomial format
params	the NTRUEncrypt context

Returns

newly allocated array of binary polynomials

Definition at line 81 of file ntru_ascii_poly.c.

fmpz_poly_t** ascii_to_bin_poly_arr	(	const string *	to_poly,
		const ntru_params *	params
	)

Convert an ascii string to an array of binary polyomials. The ascii string will be converted to a binary representation and the following mapping will apply between binary -> poly:

1 => 1

0 => -1

If the last polynomial is of degree less than N -1, then it will be filled with trailing 2's for later use in bin_poly_arr_to_ascii().

Parameters

to_poly	the string to get into binary polynomial format
params	the NTRUEncrypt context

Returns

newly allocated array of binary polynomials

Definition at line 101 of file ntru_ascii_poly.c.

fmpz_poly_t** base64_to_poly_arr	(	const string *	to_poly,
		const ntru_params *	params
	)

Convert an base64 encoded string to an array of polyomials with coefficients which are expected to be in the range [0, q-1]. The chars will be converted (after decoding) to their integer representation and directly put into the coefficients.

If the last polynomial is of degree less than N -1, then it will be filled with trailing q's for later user in poly_arr_to_base64().

Parameters

to_poly	the string to get into polynomial format, which is of type string, so we can iterate safely over it (the string might have null-bytes in the middle of it)
params	the NTRUEncrypt context

Returns

newly allocated array of polynomials

Definition at line 146 of file ntru_ascii_poly.c.

static char * get_int_to_bin_str ( uint8_t  value )

static

Convert an integer to it's binary representation as a string and return it.

As in: 90 => "10110101"

Parameters

value

the integer to convert

Returns

the binary representation as a newly allocated string

Definition at line 62 of file ntru_ascii_poly.c.