81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/**
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* @file prng.h
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* @version $Format:%h%d$
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*
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* Pseudorandom Number Generator header.
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*/
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/*
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* Copyright (c) 2013-2017 Rambus Inc.
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* Copyright (c) PeerSec Networks, 2002-2011
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* All Rights Reserved
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*
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* The latest version of this code is available at http://www.matrixssl.org
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*
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* This software is open source; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This General Public License does NOT permit incorporating this software
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* into proprietary programs. If you are unable to comply with the GPL, a
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* commercial license for this software may be purchased from Rambus at
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* http://www.rambus.com/
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*
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* This program is distributed in WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* http://www.gnu.org/copyleft/gpl.html
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*/
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/******************************************************************************/
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#ifndef _h_PS_PRNG
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# define _h_PS_PRNG
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# ifdef USE_YARROW
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/*
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AES SHA-1 implementation
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*/
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# define CTR_COUNTER_LITTLE_ENDIAN 0x0000
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# define CTR_COUNTER_BIG_ENDIAN 0x1000
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# define AESBLOCKSIZE 16
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typedef struct
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{
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# ifdef USE_SHA256
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unsigned char pool[SHA256_HASH_SIZE]; /* hash of entropy */
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# else
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unsigned char pool[SHA1_HASH_SIZE]; /* hash of entropy */
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# endif
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int32 mode; /** The mode (endianess) of the CTR, 0==little, 1==big */
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int32 ctrlen; /** counter width */
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int32 padlen; /** The padding offset */
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int32 blocklen; /** The AESBLOCKSIZE */
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unsigned char ctr[AESBLOCKSIZE]; /** The counter being encrypted */
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unsigned char pad[AESBLOCKSIZE]; /** The actual prn */
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psAesKey_t key; /** The scheduled key */
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} psYarrow_t;
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# endif /* USE_YARROW */
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/*
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prng.c wrapper
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*/
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# define RANDOM_BYTES_BEFORE_ENTROPY 1024 /* add entropy each time # bytes read */
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# define RANDOM_ENTROPY_BYTES 8 /* Bytes of entropy from source */
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typedef struct
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{
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# ifdef USE_YARROW
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psYarrow_t yarrow;
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# endif
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uint32 bytecount; /* number of bytes read from this context */
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} psRandom_t;
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/******************************************************************************/
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#endif /* _h_PS_PRNG */
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