146 lines
3.4 KiB
C
146 lines
3.4 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_keypair.h
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* This file holds the public API of the most basic
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* data types of the pqc NTRU implementation and is
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* meant to be installed on the client system.
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* @brief public API, basic data types
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*/
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#ifndef PUBLIC_NTRU_KEYPAIR_H_
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#define PUBLIC_NTRU_KEYPAIR_H_
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#include "ntru.h"
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#include <fmpz_poly.h>
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#include <fmpz.h>
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#include <stdbool.h>
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#include <stdint.h>
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typedef struct keypair keypair;
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/**
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* This struct holds the keypair,
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* both private and public components.
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*/
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struct keypair {
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/**
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* First part of the private key,
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* a random polynom.
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*/
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fmpz_poly_t priv;
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/**
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* Second part of the private key,
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* the priv polynom inverted.
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*/
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fmpz_poly_t priv_inv;
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/**
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* The public key, computed as:
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* h = p * (Fq * g) mod q
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*/
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fmpz_poly_t pub;
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};
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/**
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* Creates an NTRU key pair,
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* consisting of public and private
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* components.
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*
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* @param f a random polynomial
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* @param g a random polynomial
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* @param pair store private and public components here [out]
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* @param params the NTRU context
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*/
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bool
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ntru_create_keypair(
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fmpz_poly_t f,
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fmpz_poly_t g,
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keypair *pair,
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ntru_params *params);
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/**
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* Export the public key to a file.
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*
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* @param filename the file to save the public key into
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* @param pub the public key
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* @param params the NTRU context
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*/
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void
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export_public_key(char const * const filename,
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fmpz_poly_t pub,
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ntru_params *params);
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/**
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* Export the private key to a file.
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*
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* @param filename the file to save the private key into
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* @param priv the private key
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* @param params the NTRU context
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*/
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void
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export_priv_key(char const * const filename,
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fmpz_poly_t priv,
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ntru_params *params);
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/**
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* Import the public key from a file.
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* @param filename the file to get the public key from
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* @param pub where to save the public key [out]
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* @param params the NTRU context
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*/
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void
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import_public_key(char const * const filename,
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fmpz_poly_t pub,
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ntru_params *params);
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/**
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* Import the private key from a file and store him
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* along with his inverse.
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*
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* @param filename the file to get the private key from
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* @param priv where to save the private key [out]
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* @param priv_inv where to save the inverse of the private key [out]
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* @param params the NTRU context
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*/
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void
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import_priv_key(char const * const filename,
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fmpz_poly_t priv,
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fmpz_poly_t priv_inv,
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ntru_params *params);
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/**
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* Used to free the inner structure
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* of a keypair. This will not call free()
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* on the pair itself.
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*
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* @param pair the pair to free the inner structure of
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*/
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void
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ntru_delete_keypair(keypair *pair);
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#endif /* PUBLIC_NTRU_KEYPAIR_H_ */
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