usr/src/lib/libbc/libc/gen/common/pwdauth.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1992 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <stdio.h>
  30 #include <pwd.h>
  31 #include <shadow.h>
  32 #include <errno.h>
  33
  34 /*
  35  * Version to go in the BCP compatibility library in SVr4 version of
  36  * SunOS. This does not bother talking to rpc.pwdauthd or looking for the
  37  * password.adjunct file on the system since they do not exist anymore.
  38  * They have been effectively replaced by a more robust aging security provided
  39  * by the combination of /etc/shadow file, shadow support in the NIS+
  40  * passwd table and the use of secure RPC in NIS+.
  41  */
  42
  43 int
  44 pwdauth(char *name, char *password)
  45 {
  46         /*
  47          * this routine authenticates a password for the named user.
  48          * Assumes the adjunct file does not exist.
  49          * and therefore checks the passwd "source" using the standard
  50          * getpwnam(3C) routine that uses /etc/nsswitch.conf(4).
  51          */
  52
  53         struct passwd   *pwp = NULL;
  54         struct spwd     *spwp = NULL;
  55         char *enpwp;
  56
  57         if (spwp = getspnam(name))
  58                 enpwp = spwp->sp_pwdp;
  59         else if (pwp = getpwnam(name))
  60                 enpwp = pwp->pw_passwd;
  61         else
  62                 /* user is not in main password system */
  63                 return (-1);
  64         if (enpwp[0] == '#' && enpwp[1] == '#') {
  65                 /* this means that /etc/passwd has problems */
  66                 fprintf(stderr, "pwdauth: bad passwd entry for %s\n",
  67                     name);
  68                 return (-1);
  69         }
  70         if (strcmp(crypt(password, enpwp), enpwp) == 0)
  71                 return (0);
  72         else
  73                 return (-1);
  74 }