/*      $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 */