[hcoop/debian/courier-authlib.git] / random128 / random128binary.c

/*
** Copyright 2002 Double Precision, Inc.
** See COPYING for distribution information.
*/

#if	HAVE_CONFIG_H
#include	"config.h"
#endif

#if	HAVE_UNISTD_H
#include	<unistd.h>
#endif
#include	<ctype.h>
#include	<string.h>
#include	"random128.h"

static const char rcsid[]="$Id: random128binary.c,v 1.2 2004/10/21 00:10:50 mrsam Exp $";

static int nyb(char c)
{
	static const char xdigit[]="0123456789ABCDEF";

	const char *p=strchr(xdigit, c);

	if (p)
		return (p-xdigit);
	return 0;
}

void random128_binary(random128binbuf *bytes)
{
	char randombuf[ 128 / 8 * 2 + 1];
	int i;

	strcpy(randombuf, random128());

	for (i=0; i<128/8; i++)
		(*bytes)[i]=(nyb(randombuf[i*2]) << 4) | nyb(randombuf[i*2+1]);
}
Commit	Line	Data
d9898ee8	1	/*
	2	** Copyright 2002 Double Precision, Inc.
	3	** See COPYING for distribution information.
	4	*/
	5
	6	#if HAVE_CONFIG_H
	7	#include "config.h"
	8	#endif
	9
	10	#if HAVE_UNISTD_H
	11	#include <unistd.h>
	12	#endif
	13	#include <ctype.h>
	14	#include <string.h>
	15	#include "random128.h"
	16
	17	static const char rcsid[]="$Id: random128binary.c,v 1.2 2004/10/21 00:10:50 mrsam Exp $";
	18
	19	static int nyb(char c)
	20	{
	21	static const char xdigit[]="0123456789ABCDEF";
	22
	23	const char *p=strchr(xdigit, c);
	24
	25	if (p)
	26	return (p-xdigit);
	27	return 0;
	28	}
	29
	30	void random128_binary(random128binbuf *bytes)
	31	{
	32	char randombuf[ 128 / 8 * 2 + 1];
	33	int i;
	34
	35	strcpy(randombuf, random128());
	36
	37	for (i=0; i<128/8; i++)
	38	(bytes)[i]=(nyb(randombuf[i2]) << 4) \| nyb(randombuf[i*2+1]);
	39	}