Return to rng_tester.c CVS log

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

Annotation of embedaddon/strongswan/src/libstrongswan/crypto/rngs/rng_tester.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2013 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: #include "rng_tester.h"
        !            17: 
        !            18: typedef struct private_rng_t private_rng_t;
        !            19: 
        !            20: /**
        !            21:  * Private data.
        !            22:  */
        !            23: struct private_rng_t {
        !            24: 
        !            25:        /**
        !            26:         * Public interface.
        !            27:         */
        !            28:        rng_t public;
        !            29: 
        !            30:        /**
        !            31:         * Entropy string.
        !            32:         */
        !            33:        chunk_t entropy;
        !            34: };
        !            35: 
        !            36: METHOD(rng_t, get_bytes, bool,
        !            37:        private_rng_t *this, size_t bytes, uint8_t *buffer)
        !            38: {
        !            39:        if (bytes > this->entropy.len)
        !            40:        {
        !            41:                return FALSE;
        !            42:        }
        !            43:        memcpy(buffer, this->entropy.ptr, bytes);
        !            44:        this->entropy = chunk_skip(this->entropy, bytes);
        !            45:        return TRUE;
        !            46: }
        !            47: 
        !            48: METHOD(rng_t, allocate_bytes, bool,
        !            49:        private_rng_t *this, size_t bytes, chunk_t *chunk)
        !            50: {
        !            51:        if (bytes > this->entropy.len)
        !            52:        {
        !            53:                *chunk = chunk_empty;
        !            54:                return FALSE;
        !            55:        }
        !            56: 
        !            57:        *chunk = chunk_alloc(bytes);
        !            58:        memcpy(chunk->ptr, this->entropy.ptr, bytes);
        !            59:        this->entropy = chunk_skip(this->entropy, bytes);
        !            60:        return TRUE;
        !            61: }
        !            62: 
        !            63: METHOD(rng_t, destroy, void,
        !            64:        private_rng_t *this)
        !            65: {
        !            66:        free(this);
        !            67: }
        !            68: 
        !            69: /*
        !            70:  * Described in header.
        !            71:  */
        !            72: rng_t *rng_tester_create(chunk_t entropy)
        !            73: {
        !            74:        private_rng_t *this;
        !            75: 
        !            76:        INIT(this,
        !            77:                .public = {
        !            78:                        .get_bytes = _get_bytes,
        !            79:                        .allocate_bytes = _allocate_bytes,
        !            80:                        .destroy = _destroy,
        !            81:                },
        !            82:                .entropy = entropy,
        !            83:        );
        !            84: 
        !            85:        return &this->public;
        !            86: }