random.c File Reference

#include "config.h"
#include "config_win32.h"
#include "config_unix.h"
#include "crypto/random.h"

Include dependency graph for random.c:

Go to the source code of this file.

Functions
uint32_t	lbl_random (void)
void	lbl_srandom (uint32_t seed)

Variables
static uint32_t	randseed = 1

Function Documentation

lbl_random()

uint32_t lbl_random

(

void

)

Definition at line 61 of file random.c.

{
#ifdef HAVE_DEV_URANDOM
        int fd, res, l;
 
        fd = open("/dev/urandom", O_RDONLY);
        if (fd == -1) {
                perror("Cannot open random sequence generator");
                abort();
        }
        l = read(fd, &res, sizeof(res));
        if (l != sizeof(res)) {
                perror("Cannot read random data");
                abort();
        }
        close(fd);
        return res;
#else
        register uint32_t x = randseed;
        register uint32_t hi, lo, t;
 
        hi = x / 127773;
        lo = x % 127773;
        t = 16807 * lo - 2836 * hi;
        if (t <= 0)
                t += 0x7fffffff;
        randseed = t;
        return (t);
#endif
}

References randseed.

Referenced by qfDES_generate().

lbl_srandom()

void lbl_srandom

(

uint32_t

seed

)

Definition at line 56 of file random.c.

{
        randseed = seed;
}

References randseed.

Referenced by qfDES_generate().

Variable Documentation

randseed

uint32_t randseed = 1

static

Definition at line 54 of file random.c.

Referenced by lbl_random(), and lbl_srandom().