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Diffstat (limited to 'gl/lib/rand-isaac.h')
-rw-r--r-- | gl/lib/rand-isaac.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gl/lib/rand-isaac.h b/gl/lib/rand-isaac.h new file mode 100644 index 000000000..94ca74f53 --- /dev/null +++ b/gl/lib/rand-isaac.h @@ -0,0 +1,43 @@ +/* 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. + + 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 |