isaac.c File Reference

Bob Jenkin's random number generator. More...

#include <freeradius-devel/util/rand.h>

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Macros
#define	ind(mm, x)   ((mm)[(x >> 2) &(RANDSIZ-1)])
#define	mix(a, b, c, d, e, f, g, h)
#define	RANDSIZ   (1 << RANDSIZL)
#define	RANDSIZL   (8) /* I recommend 8 for crypto, 4 for simulations */
#define	rngstep(mix, a, b, mm, m, m2, r, x)

Functions
void	fr_isaac (fr_randctx *ctx)
void	fr_isaac_init (fr_randctx *ctx, int flag)

Detailed Description

Bob Jenkin's random number generator.

Bob's random number generator, ISAAC. Public Domain.

    http://burtleburtle.net/bob/rand/isaac.html

Author

Bob Jenkins.

Definition in file isaac.c.

Macro Definition Documentation

ind

#define ind	(		mm,
			x
	)		((mm)[(x >> 2) &(RANDSIZ-1)])

Definition at line 18 of file isaac.c.

mix

#define mix	(		a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

do { \
        a ^= b << 11; d += a; b += c; \
        b ^= c >> 2;  e += b; c += d; \
        c ^= d << 8;  f += c; d += e; \
        d ^= e >> 16; g += d; e += f; \
        e ^= f << 10; h += e; f += g; \
        f ^= g >> 4;  a += f; g += h; \
        g ^= h << 8;  b += g; h += a; \
        h ^= a >> 9;  c += h; a += b; \
} while (0)

Definition at line 72 of file isaac.c.

RANDSIZ

#define RANDSIZ   (1 << RANDSIZL)

Definition at line 16 of file isaac.c.

RANDSIZL

#define RANDSIZL   (8) /* I recommend 8 for crypto, 4 for simulations */

Definition at line 15 of file isaac.c.

rngstep

#define rngstep	(		mix,
			a,
			b,
			mm,
			m,
			m2,
			r,
			x
	)

Value:

do { \
        x = *m;  \
        a = ((a^(mix)) + *(m2++)) & 0xffffffff; \
        *(m++) = y = (ind(mm, x) + a + b) & 0xffffffff; \
        *(r++) = b = (ind(mm, y >> RANDSIZL) + x) & 0xffffffff; \
} while (0)

Definition at line 19 of file isaac.c.

Function Documentation

fr_isaac()

void fr_isaac

(

fr_randctx *

ctx

)

Definition at line 46 of file isaac.c.

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fr_isaac_init()

void fr_isaac_init	(	fr_randctx *	ctx,
		int	flag
	)

Definition at line 85 of file isaac.c.

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