330 lines
7.5 KiB
C
330 lines
7.5 KiB
C
/*-
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* netname utility routines convert from unix names to network names and
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* vice-versa This module is operating system dependent! What we define here
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* will work with any unix system that has adopted the sun NIS domain
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* architecture.
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*/
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#include "namespace.h"
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#include <sys/param.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#ifdef YP
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#include <grp.h>
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#include <pwd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "un-namespace.h"
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static char *OPSYS = "unix";
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#ifdef YP
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static char *NETID = "netid.byname";
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#endif
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static char *NETIDFILE = "/etc/netid";
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static int getnetid( char *, char * );
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static int _getgroups( char *, gid_t * );
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/*
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* Convert network-name into unix credential
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*/
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int
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netname2user(netname, uidp, gidp, gidlenp, gidlist)
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char netname[MAXNETNAMELEN + 1];
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uid_t *uidp;
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gid_t *gidp;
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int *gidlenp;
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gid_t *gidlist;
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{
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char *p;
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int gidlen;
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uid_t uid;
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long luid;
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struct passwd *pwd;
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char val[1024];
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char *val1, *val2;
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char *domain;
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int vallen;
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int err;
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if (getnetid(netname, val)) {
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char *res = val;
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p = strsep(&res, ":");
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if (p == NULL)
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return (0);
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*uidp = (uid_t) atol(p);
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p = strsep(&res, "\n,");
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if (p == NULL) {
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return (0);
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}
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*gidp = (gid_t) atol(p);
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for (gidlen = 0; gidlen < NGRPS; gidlen++) {
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p = strsep(&res, "\n,");
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if (p == NULL)
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break;
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gidlist[gidlen] = (gid_t) atol(p);
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}
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*gidlenp = gidlen;
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return (1);
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}
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val1 = strchr(netname, '.');
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if (val1 == NULL)
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return (0);
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if (strncmp(netname, OPSYS, (val1-netname)))
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return (0);
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val1++;
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val2 = strchr(val1, '@');
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if (val2 == NULL)
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return (0);
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vallen = val2 - val1;
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if (vallen > (1024 - 1))
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vallen = 1024 - 1;
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(void) strncpy(val, val1, 1024);
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val[vallen] = 0;
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err = __rpc_get_default_domain(&domain); /* change to rpc */
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if (err)
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return (0);
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if (strcmp(val2 + 1, domain))
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return (0); /* wrong domain */
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if (sscanf(val, "%ld", &luid) != 1)
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return (0);
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uid = luid;
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/* use initgroups method */
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pwd = getpwuid(uid);
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if (pwd == NULL)
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return (0);
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*uidp = pwd->pw_uid;
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*gidp = pwd->pw_gid;
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*gidlenp = _getgroups(pwd->pw_name, gidlist);
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return (1);
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}
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/*
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* initgroups
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*/
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static int
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_getgroups(uname, groups)
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char *uname;
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gid_t groups[NGRPS];
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{
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gid_t ngroups = 0;
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struct group *grp;
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int i;
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int j;
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int filter;
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setgrent();
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while ((grp = getgrent())) {
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for (i = 0; grp->gr_mem[i]; i++)
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if (!strcmp(grp->gr_mem[i], uname)) {
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if (ngroups == NGRPS) {
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#ifdef DEBUG
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fprintf(stderr,
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"initgroups: %s is in too many groups\n", uname);
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#endif
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goto toomany;
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}
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/* filter out duplicate group entries */
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filter = 0;
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for (j = 0; j < ngroups; j++)
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if (groups[j] == grp->gr_gid) {
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filter++;
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break;
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}
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if (!filter)
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groups[ngroups++] = grp->gr_gid;
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}
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}
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toomany:
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endgrent();
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return (ngroups);
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}
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/*
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* Convert network-name to hostname
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*/
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int
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netname2host(netname, hostname, hostlen)
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char netname[MAXNETNAMELEN + 1];
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char *hostname;
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int hostlen;
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{
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int err;
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char valbuf[1024];
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char *val;
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char *val2;
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int vallen;
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char *domain;
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if (getnetid(netname, valbuf)) {
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val = valbuf;
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if ((*val == '0') && (val[1] == ':')) {
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(void) strncpy(hostname, val + 2, hostlen);
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return (1);
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}
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}
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val = strchr(netname, '.');
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if (val == NULL)
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return (0);
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if (strncmp(netname, OPSYS, (val - netname)))
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return (0);
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val++;
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val2 = strchr(val, '@');
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if (val2 == NULL)
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return (0);
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vallen = val2 - val;
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if (vallen > (hostlen - 1))
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vallen = hostlen - 1;
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(void) strncpy(hostname, val, vallen);
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hostname[vallen] = 0;
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err = __rpc_get_default_domain(&domain); /* change to rpc */
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if (err)
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return (0);
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if (strcmp(val2 + 1, domain))
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return (0); /* wrong domain */
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else
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return (1);
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}
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/*
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* reads the file /etc/netid looking for a + to optionally go to the
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* network information service.
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*/
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int
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getnetid(key, ret)
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char *key, *ret;
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{
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char buf[1024]; /* big enough */
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char *res;
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char *mkey;
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char *mval;
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FILE *fd;
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#ifdef YP
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char *domain;
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int err;
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char *lookup;
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int len;
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#endif
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fd = fopen(NETIDFILE, "r");
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if (fd == NULL) {
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#ifdef YP
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res = "+";
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goto getnetidyp;
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#else
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return (0);
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#endif
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}
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for (;;) {
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if (fd == NULL)
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return (0); /* getnetidyp brings us here */
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res = fgets(buf, sizeof(buf), fd);
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if (res == NULL) {
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fclose(fd);
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return (0);
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}
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if (res[0] == '#')
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continue;
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else if (res[0] == '+') {
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#ifdef YP
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getnetidyp:
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err = yp_get_default_domain(&domain);
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if (err) {
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continue;
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}
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lookup = NULL;
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err = yp_match(domain, NETID, key,
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strlen(key), &lookup, &len);
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if (err) {
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#ifdef DEBUG
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fprintf(stderr, "match failed error %d\n", err);
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#endif
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continue;
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}
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lookup[len] = 0;
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strcpy(ret, lookup);
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free(lookup);
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if (fd != NULL)
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fclose(fd);
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return (2);
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#else /* YP */
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#ifdef DEBUG
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fprintf(stderr,
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"Bad record in %s '+' -- NIS not supported in this library copy\n",
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NETIDFILE);
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#endif
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continue;
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#endif /* YP */
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} else {
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mkey = strsep(&res, "\t ");
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if (mkey == NULL) {
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fprintf(stderr,
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"Bad record in %s -- %s", NETIDFILE, buf);
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continue;
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}
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do {
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mval = strsep(&res, " \t#\n");
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} while (mval != NULL && !*mval);
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if (mval == NULL) {
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fprintf(stderr,
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"Bad record in %s val problem - %s", NETIDFILE, buf);
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continue;
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}
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if (strcmp(mkey, key) == 0) {
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strcpy(ret, mval);
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fclose(fd);
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return (1);
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}
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}
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}
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}
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