Return to mac_prf.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / strongswan / src / libstrongswan / crypto / prfs

Annotation of embedaddon/strongswan/src/libstrongswan/crypto/prfs/mac_prf.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2012 Tobias Brunner
        !             3:  * Copyright (C) 2005-2006 Martin Willi
        !             4:  * Copyright (C) 2005 Jan Hutter
        !             5:  * HSR Hochschule fuer Technik Rapperswil
        !             6:  *
        !             7:  * This program is free software; you can redistribute it and/or modify it
        !             8:  * under the terms of the GNU General Public License as published by the
        !             9:  * Free Software Foundation; either version 2 of the License, or (at your
        !            10:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
        !            11:  *
        !            12:  * This program is distributed in the hope that it will be useful, but
        !            13:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
        !            15:  * for more details.
        !            16:  */
        !            17: 
        !            18: #include "mac_prf.h"
        !            19: 
        !            20: typedef struct private_prf_t private_prf_t;
        !            21: 
        !            22: /**
        !            23:  * Private data of a mac_prf_t object.
        !            24:  */
        !            25: struct private_prf_t {
        !            26: 
        !            27:        /**
        !            28:         * Public interface
        !            29:         */
        !            30:        prf_t public;
        !            31: 
        !            32:        /**
        !            33:         * MAC to use
        !            34:         */
        !            35:        mac_t *mac;
        !            36: };
        !            37: 
        !            38: METHOD(prf_t, get_bytes, bool,
        !            39:        private_prf_t *this, chunk_t seed, uint8_t *buffer)
        !            40: {
        !            41:        return this->mac->get_mac(this->mac, seed, buffer);
        !            42: }
        !            43: 
        !            44: METHOD(prf_t, allocate_bytes, bool,
        !            45:        private_prf_t *this, chunk_t seed, chunk_t *chunk)
        !            46: {
        !            47:        if (chunk)
        !            48:        {
        !            49:                *chunk = chunk_alloc(this->mac->get_mac_size(this->mac));
        !            50:                return this->mac->get_mac(this->mac, seed, chunk->ptr);
        !            51:        }
        !            52:        return this->mac->get_mac(this->mac, seed, NULL);
        !            53: }
        !            54: 
        !            55: METHOD(prf_t, get_block_size, size_t,
        !            56:        private_prf_t *this)
        !            57: {
        !            58:        return this->mac->get_mac_size(this->mac);
        !            59: }
        !            60: 
        !            61: METHOD(prf_t, get_key_size, size_t,
        !            62:        private_prf_t *this)
        !            63: {
        !            64:        /* IKEv2 uses MAC size as key size */
        !            65:        return this->mac->get_mac_size(this->mac);
        !            66: }
        !            67: 
        !            68: METHOD(prf_t, set_key, bool,
        !            69:        private_prf_t *this, chunk_t key)
        !            70: {
        !            71:        return this->mac->set_key(this->mac, key);
        !            72: }
        !            73: 
        !            74: METHOD(prf_t, destroy, void,
        !            75:        private_prf_t *this)
        !            76: {
        !            77:        this->mac->destroy(this->mac);
        !            78:        free(this);
        !            79: }
        !            80: 
        !            81: /*
        !            82:  * Described in header.
        !            83:  */
        !            84: prf_t *mac_prf_create(mac_t *mac)
        !            85: {
        !            86:        private_prf_t *this;
        !            87: 
        !            88:        INIT(this,
        !            89:                .public = {
        !            90:                        .get_bytes = _get_bytes,
        !            91:                        .allocate_bytes = _allocate_bytes,
        !            92:                        .get_block_size = _get_block_size,
        !            93:                        .get_key_size = _get_key_size,
        !            94:                        .set_key = _set_key,
        !            95:                        .destroy = _destroy,
        !            96:                },
        !            97:                .mac = mac,
        !            98:        );
        !            99: 
        !           100:        return &this->public;
        !           101: }