xref: /src/usr.sbin/rpc.pcnfsd/pcnfsd_cache.c

/*	$NetBSD: pcnfsd_cache.c,v 1.5 2018/01/23 21:06:25 sevan Exp $	*/

/* RE_SID: @(%)/usr/dosnfs/shades_SCCS/unix/pcnfsd/v2/src/SCCS/s.pcnfsd_cache.c 1.1 91/09/03 12:45:14 SMI */
/*
**=====================================================================
** Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc.
**	@(#)pcnfsd_cache.c	1.1	9/3/91
**=====================================================================
*/
/*
**=====================================================================
**             I N C L U D E   F I L E   S E C T I O N                *
**                                                                    *
** If your port requires different include files, add a suitable      *
** #define in the customization section, and make the inclusion or    *
** exclusion of the files conditional on this.                        *
**=====================================================================
*/

#include <errno.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "common.h"
#include "pcnfsd.h"
#include "extern.h"

/*
**---------------------------------------------------------------------
**                       Misc. variable definitions
**---------------------------------------------------------------------
*/

#ifdef USER_CACHE
#define CACHE_SIZE 16		/* keep it small, as linear searches are done */
struct cache {
	int     cuid;
	int     cgid;
	char    cpw[32];
	char    cuname[10];	/* keep this even for machines with alignment
				 * problems */
}       User_cache[CACHE_SIZE];


/*
**---------------------------------------------------------------------
**                 User cache support procedures
**---------------------------------------------------------------------
*/


int
check_cache(char *name, char *pw, int *p_uid, int *p_gid)
{
	int     i;
	int     c1, c2;

	for (i = 0; i < CACHE_SIZE; i++) {
		if (!strcmp(User_cache[i].cuname, name)) {
			c1 = strlen(pw);
			c2 = strlen(User_cache[i].cpw);
			if ((!c1 && !c2) ||
			    !(strcmp(User_cache[i].cpw,
				    crypt(pw, User_cache[i].cpw)))) {
				*p_uid = User_cache[i].cuid;
				*p_gid = User_cache[i].cgid;
				return (1);
			}
			User_cache[i].cuname[0] = '\0';	/* nuke entry */
			return (0);
		}
	}
	return (0);
}

void
add_cache_entry(struct passwd *p)
{
	int     i;

	for (i = CACHE_SIZE - 1; i > 0; i--)
		User_cache[i] = User_cache[i - 1];
	User_cache[0].cuid = p->pw_uid;
	User_cache[0].cgid = p->pw_gid;
	(void) strlcpy(User_cache[0].cpw, p->pw_passwd,
	    sizeof(User_cache[0].cpw));
	(void) strlcpy(User_cache[0].cuname, p->pw_name,
	    sizeof(User_cache[0].cuname));
}

#endif				/* USER_CACHE */