ntru_encrypt.c File Reference

NTRU encryption. More...

#include "ntru_ascii_poly.h"
#include "ntru_encrypt.h"
#include "ntru_mem.h"
#include "ntru_params.h"
#include "ntru_poly.h"
#include "ntru_poly_ascii.h"
#include "ntru_string.h"
#include <string.h>
#include <fmpz_poly.h>
#include <fmpz.h>

Include dependency graph for ntru_encrypt.c:

Go to the source code of this file.

Functions
void	ntru_encrypt_poly (const fmpz_poly_t msg_bin, const fmpz_poly_t pub_key, const fmpz_poly_t rnd, fmpz_poly_t out, const ntru_params *params)
string *	ntru_encrypt_string (const string *msg, const fmpz_poly_t pub_key, const fmpz_poly_t rnd, const ntru_params *params)

Detailed Description

NTRU encryption.

This file handles the NTRU encryption algorithm.

Definition in file ntru_encrypt.c.

Function Documentation

void ntru_encrypt_poly	(	const fmpz_poly_t	msg_tern,
		const fmpz_poly_t	pub_key,
		const fmpz_poly_t	rnd,
		fmpz_poly_t	out,
		const ntru_params *	params
	)

encrypt the msg, using the math: e = (h ∗ r) + m (mod q)

e = the encrypted poly

h = the public key

r = the random poly

m = the message poly

q = large mod

Parameters

msg_tern	the message to encrypt, in ternary format
pub_key	the public key
rnd	the random poly (should have relatively small coefficients, but not restricted to {-1, 0, 1})
out	the output poly which is in the range {0, q-1} (not ternary!) [out]
params	ntru_params the ntru context

Definition at line 46 of file ntru_encrypt.c.

string* ntru_encrypt_string	(	const string *	msg,
		const fmpz_poly_t	pub_key,
		const fmpz_poly_t	rnd,
		const ntru_params *	params
	)

Encrypt a message in the form of a null-terminated char array and return a string.

Parameters

msg	the message
pub_key	the public key
rnd	the random poly (should have relatively small coefficients, but not restricted to {-1, 0, 1})
params	ntru_params the ntru context

Returns

the newly allocated encrypted string

Definition at line 74 of file ntru_encrypt.c.