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author | Paul Eggert <eggert@cs.ucla.edu> | 2006-08-08 22:22:47 +0000 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2006-08-08 22:22:47 +0000 |
commit | 73742c2566e6f8d56b3b132026ad477b9924e774 (patch) | |
tree | 823ee8f3472c0901cdcc6d662a110efc4b7ea1ae /lib/rand-isaac.h | |
parent | f2f8ea1001b4e29bba94b47f72d21f758e596288 (diff) | |
download | coreutils-73742c2566e6f8d56b3b132026ad477b9924e774.tar.xz |
New file, introduced for shuf, sort -R, and/or shred.
Diffstat (limited to 'lib/rand-isaac.h')
-rw-r--r-- | lib/rand-isaac.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/rand-isaac.h b/lib/rand-isaac.h new file mode 100644 index 000000000..f8daee03d --- /dev/null +++ b/lib/rand-isaac.h @@ -0,0 +1,44 @@ +/* Bob Jenkins's cryptographic random number generator, ISAAC. + + Copyright (C) 1999-2005 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 1999 Colin Plumb. + + 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; either version 2, or (at your option) + any later version. + + 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. + + Written by Colin Plumb. */ + +#ifndef RAND_ISAAC_H +# define RAND_ISAAC_H + +# include <stdint.h> + +/* Size of the state tables to use. ISAAC_LOG should be at least 3, + and smaller values give less security. */ +# define ISAAC_LOG 8 +# define ISAAC_WORDS (1 << ISAAC_LOG) +# define ISAAC_BYTES (ISAAC_WORDS * sizeof (uint32_t)) + +/* RNG state variables. The members of this structure are private. */ +struct isaac_state + { + uint32_t mm[ISAAC_WORDS]; /* Main state array */ + uint32_t iv[8]; /* Seeding initial vector */ + uint32_t a, b, c; /* Extra index variables */ + }; + +void isaac_seed (struct isaac_state *); +void isaac_refill (struct isaac_state *, uint32_t[ISAAC_WORDS]); + +#endif |