passwd.tproj/pam_passwd.c

   1 /*
   2  * Copyright (c) 1999-2008 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #include <stdio.h>
  24
  25 #include <security/pam_appl.h>
  26 #include <security/openpam.h>   /* for openpam_ttyconv() */
  27
  28 extern char* progname;
  29 static pam_handle_t *pamh;
  30 static struct pam_conv pamc;
  31
  32 int
  33 pam_passwd(char* uname)
  34 {
  35         int retval = PAM_SUCCESS;
  36
  37         /* Initialize PAM. */
  38         pamc.conv = &openpam_ttyconv;
  39         pam_start(progname, uname, &pamc, &pamh);
  40
  41         /* Authenticate. */
  42         if (PAM_SUCCESS != (retval = pam_authenticate(pamh, 0)))
  43                 goto pamerr;
  44
  45         /* Authorize. */
  46         if (PAM_SUCCESS != (retval = pam_acct_mgmt(pamh, 0)) && PAM_NEW_AUTHTOK_REQD != retval)
  47                 goto pamerr;
  48
  49         printf("Changing password for %s.\n", uname);
  50
  51         /* Change the password. */
  52         if (PAM_SUCCESS != (retval = pam_chauthtok(pamh, 0)))
  53                 goto pamerr;
  54
  55         /* Set the credentials. */
  56         if (PAM_SUCCESS != (retval = pam_setcred(pamh, PAM_ESTABLISH_CRED)))
  57                 goto pamerr;
  58
  59         /* Open the session. */
  60         if (PAM_SUCCESS != (retval = pam_open_session(pamh, 0)))
  61                 goto pamerr;
  62
  63         /* Close the session. */
  64         if (PAM_SUCCESS != (retval = pam_close_session(pamh, 0)))
  65                 goto pamerr;
  66
  67 pamerr:
  68         /* Print an error, if needed. */
  69         if (PAM_SUCCESS != retval)
  70                 fprintf(stderr, "%s: %s\n", progname, pam_strerror(pamh, retval));
  71
  72         /* Terminate PAM. */
  73         pam_end(pamh, retval);
  74         return retval;
  75 }