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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: }