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/* $OpenBSD: pcnfsd_cache.c,v 1.6 2003/02/15 12:15:04 deraadt Exp $ */
/* $NetBSD: pcnfsd_cache.c,v 1.2 1995/07/25 22:20:37 gwr Exp $ */
/*
*=====================================================================
* Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc.
* @(#)pcnfsd_cache.c 1.1 9/3/91
*
* pcnfsd is copyrighted software, but is freely licensed. This
* means that you are free to redistribute it, modify it, ship it
* in binary with your system, whatever, provided:
*
* - you leave the Sun copyright notice in the source code
* - you make clear what changes you have introduced and do
* not represent them as being supported by Sun.
*
* If you make changes to this software, we ask that you do so in
* a way which allows you to build either the "standard" version or
* your custom version from a single source file. Test it, lint
* it (it won't lint 100%, very little does, and there are bugs in
* some versions of lint :-), and send it back to Sun via email
* so that we can roll it into the source base and redistribute
* it. We'll try to make sure your contributions are acknowledged
* in the source, but after all these years it's getting hard to
* remember who did what.
*=====================================================================
*/
#include <stdio.h>
#include <pwd.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "pcnfsd.h"
#define CACHE_SIZE 16 /* keep it small, as linear searches are
* done */
struct cache
{
int cuid;
int cgid;
char cpw[_PASSWORD_LEN];
char cuname[10]; /* keep this even for machines
* with alignment problems */
} User_cache[CACHE_SIZE];
int
check_cache(name, pw, p_uid, p_gid)
char *name, *pw;
int *p_uid, *p_gid;
{
int i, 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(p)
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)strncpy(User_cache[0].cpw, p->pw_passwd, sizeof User_cache[0].cpw-1);
User_cache[0].cpw[sizeof User_cache[0].cpw-1] = '\0';
(void)strncpy(User_cache[0].cuname, p->pw_name, sizeof User_cache[0].cuname-1);
User_cache[0].cuname[sizeof User_cache[0].cuname-1] = '\0';
}
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