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Annotation of embedaddon/strongswan/src/libstrongswan/plugins/ntru/ntru_poly.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2014-2016 Andreas Steffen
        !             3:  * HSR Hochschule fuer Technik Rapperswil
        !             4:  *
        !             5:  * This program is free software; you can redistribute it and/or modify it
        !             6:  * under the terms of the GNU General Public License as published by the
        !             7:  * Free Software Foundation; either version 2 of the License, or (at your
        !             8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
        !             9:  *
        !            10:  * This program is distributed in the hope that it will be useful, but
        !            11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
        !            13:  * for more details.
        !            14:  */
        !            15: 
        !            16: /**
        !            17:  * @defgroup ntru_poly ntru_poly
        !            18:  * @{ @ingroup ntru_p
        !            19:  */
        !            20: 
        !            21: #ifndef NTRU_POLY_H_
        !            22: #define NTRU_POLY_H_
        !            23: 
        !            24: typedef struct ntru_poly_t ntru_poly_t;
        !            25: 
        !            26: #include <library.h>
        !            27: #include <crypto/xofs/xof.h>
        !            28: 
        !            29: /**
        !            30:  * Implements a trinary polynomial storing the indices of non-zero coefficients
        !            31:  */
        !            32: struct ntru_poly_t {
        !            33: 
        !            34:        /**
        !            35:         * Get the size of the indices array
        !            36:         *
        !            37:         * @return                      number of indices
        !            38:         */
        !            39:        size_t (*get_size)(ntru_poly_t *this);
        !            40: 
        !            41:        /**
        !            42:         * @return                      array containing the indices of the non-zero coefficients
        !            43:         */
        !            44:        uint16_t* (*get_indices)(ntru_poly_t *this);
        !            45: 
        !            46:        /**
        !            47:         * @param array         array containing all N coefficients of the polynomial
        !            48:         */
        !            49:        void (*get_array)(ntru_poly_t *this, uint16_t *array);
        !            50: 
        !            51:        /**
        !            52:         * Multiply polynomial a with ntru_poly_t object b having sparse coefficients
        !            53:         * to form result polynomial c = a * b
        !            54:         *
        !            55:         * @param a                     input polynomial a
        !            56:         * @param b                     output polynomial c
        !            57:         */
        !            58:        void (*ring_mult)(ntru_poly_t *this, uint16_t *a, uint16_t *c);
        !            59: 
        !            60:        /**
        !            61:         * Destroy ntru_poly_t object
        !            62:         */
        !            63:        void (*destroy)(ntru_poly_t *this);
        !            64: };
        !            65: 
        !            66: /**
        !            67:  * Create a trits polynomial from a seed using MGF1
        !            68:  *
        !            69:  * @param alg                          MGF1 algorithm used(XOF_MGF1_SHA1 or XOF_MGF_SHA256)
        !            70:  * @param seed                         seed used by MGF1 to generate trits from
        !            71:  * @param N                                    ring dimension, number of polynomial coefficients
        !            72:  * @param q                                    large modulus
        !            73:  * @param c_bits                       number of bits for candidate index
        !            74:  * @param indices_len_p                number of indices for +1 coefficients
        !            75:  * @param indices_len_m                number of indices for -1 coefficients
        !            76:  * @param is_product_form      generate multiple polynomials
        !            77:  */
        !            78: ntru_poly_t *ntru_poly_create_from_seed(ext_out_function_t alg,        chunk_t seed,
        !            79:                                                                                uint8_t c_bits, uint16_t N, uint16_t q,
        !            80:                                                                                uint32_t indices_len_p,
        !            81:                                                                                uint32_t indices_len_m,
        !            82:                                                                                bool is_product_form);
        !            83: 
        !            84: /**
        !            85:  * Create a trits polynomial from an array of indices of non-zero coefficients
        !            86:  *
        !            87:  * @param data                         array of indices of non-zero coefficients
        !            88:  * @param N                                    ring dimension, number of polynomial coefficients
        !            89:  * @param q                                    large modulus
        !            90:  * @param indices_len_p                number of indices for +1 coefficients
        !            91:  * @param indices_len_m                number of indices for -1 coefficients
        !            92:  * @param is_product_form      generate multiple polynomials
        !            93:  */
        !            94: ntru_poly_t *ntru_poly_create_from_data(uint16_t *data, uint16_t N, uint16_t q,
        !            95:                                                                                uint32_t indices_len_p,
        !            96:                                                                                uint32_t indices_len_m,
        !            97:                                                                                bool is_product_form);
        !            98: 
        !            99: #endif /** NTRU_POLY_H_ @}*/
        !           100: