From e244c93d21bcacf1a0eedefdcc3018a362274796 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 00:13:02 +0200 Subject: Adding upstream version 0.36. Signed-off-by: Daniel Baumann --- src/prng.h | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 src/prng.h (limited to 'src/prng.h') diff --git a/src/prng.h b/src/prng.h new file mode 100644 index 0000000..8dfa3d7 --- /dev/null +++ b/src/prng.h @@ -0,0 +1,65 @@ +/* + * prng.h: Pseudo Random Number Generator abstractions for nwipe. + * + * Copyright Darik Horn . + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License as published by the Free Software + * Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#ifndef PRNG_H_ +#define PRNG_H_ + +#include + +/* A chunk of random data. */ +typedef struct +{ + size_t length; // Length of the entropy string in bytes. + u8* s; // The actual bytes of the entropy string. +} nwipe_entropy_t; + +#define NWIPE_PRNG_INIT_SIGNATURE void **state, nwipe_entropy_t *seed +#define NWIPE_PRNG_READ_SIGNATURE void **state, void *buffer, size_t count + +/* Function pointers for PRNG actions. */ +typedef int ( *nwipe_prng_init_t )( NWIPE_PRNG_INIT_SIGNATURE ); +typedef int ( *nwipe_prng_read_t )( NWIPE_PRNG_READ_SIGNATURE ); + +/* The generic PRNG definition. */ +typedef struct +{ + const char* label; // The name of the pseudo random number generator. + nwipe_prng_init_t init; // Inialize the prng state with the seed. + nwipe_prng_read_t read; // Read data from the prng. +} nwipe_prng_t; + +/* Mersenne Twister prototypes. */ +int nwipe_twister_init( NWIPE_PRNG_INIT_SIGNATURE ); +int nwipe_twister_read( NWIPE_PRNG_READ_SIGNATURE ); + +/* ISAAC prototypes. */ +int nwipe_isaac_init( NWIPE_PRNG_INIT_SIGNATURE ); +int nwipe_isaac_read( NWIPE_PRNG_READ_SIGNATURE ); +int nwipe_isaac64_init( NWIPE_PRNG_INIT_SIGNATURE ); +int nwipe_isaac64_read( NWIPE_PRNG_READ_SIGNATURE ); + +/* Size of the twister is not derived from the architecture, but it is strictly 4 bytes */ +#define SIZE_OF_TWISTER 4 + +/* Size of the isaac/isaac64 is not derived from the architecture, but it is strictly 4 or 8 bytes */ +#define SIZE_OF_ISAAC 4 +#define SIZE_OF_ISAAC64 8 + +#endif /* PRNG_H_ */ -- cgit v1.2.3