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Annotation of embedaddon/strongswan/src/libstrongswan/plugins/nonce/nonce_nonceg.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2012 Adrian-Ken Rueegsegger
                      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: #include "nonce_nonceg.h"
                     17: 
                     18: #include <utils/debug.h>
                     19: 
                     20: typedef struct private_nonce_nonceg_t private_nonce_nonceg_t;
                     21: 
                     22: /**
                     23:  * Private data of a nonce_nonceg_t object.
                     24:  */
                     25: struct private_nonce_nonceg_t {
                     26: 
                     27:        /**
                     28:         * Public nonce_nonceg_t interface.
                     29:         */
                     30:        nonce_nonceg_t public;
                     31: 
                     32:        /**
                     33:         * Random number generator
                     34:         */
                     35:        rng_t* rng;
                     36: };
                     37: 
                     38: METHOD(nonce_gen_t, get_nonce, bool,
                     39:        private_nonce_nonceg_t *this, size_t size, uint8_t *buffer)
                     40: {
                     41:        return this->rng->get_bytes(this->rng, size, buffer);
                     42: }
                     43: 
                     44: METHOD(nonce_gen_t, allocate_nonce, bool,
                     45:        private_nonce_nonceg_t *this, size_t size, chunk_t *chunk)
                     46: {
                     47:        return this->rng->allocate_bytes(this->rng, size, chunk);
                     48: }
                     49: 
                     50: METHOD(nonce_gen_t, destroy, void,
                     51:        private_nonce_nonceg_t *this)
                     52: {
                     53:        DESTROY_IF(this->rng);
                     54:        free(this);
                     55: }
                     56: 
                     57: /*
                     58:  * Described in header.
                     59:  */
                     60: nonce_nonceg_t *nonce_nonceg_create()
                     61: {
                     62:        private_nonce_nonceg_t *this;
                     63: 
                     64:        INIT(this,
                     65:                .public = {
                     66:                        .nonce_gen = {
                     67:                                .get_nonce = _get_nonce,
                     68:                                .allocate_nonce = _allocate_nonce,
                     69:                                .destroy = _destroy,
                     70:                        },
                     71:                },
                     72:        );
                     73: 
                     74:        this->rng = lib->crypto->create_rng(lib->crypto, NONCE_RNG_QUALITY);
                     75:        if (!this->rng)
                     76:        {
                     77:                DBG1(DBG_LIB, "no RNG found for quality %N", rng_quality_names,
                     78:                         RNG_WEAK);
                     79:                destroy(this);
                     80:                return NULL;
                     81:        }
                     82: 
                     83:        return &this->public;
                     84: }