passwd.tproj/pam_passwd.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple 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 #include "passwd.h"
  25
  26 #ifdef INFO_PAM
  27
  28 #include <security/pam_appl.h>
  29 #include <security/openpam.h>   /* for openpam_ttyconv() */
  30
  31 extern char* progname;
  32 static pam_handle_t *pamh;
  33 static struct pam_conv pamc;
  34
  35 int
  36 pam_passwd(char* uname)
  37 {
  38         int retval = PAM_SUCCESS;
  39
  40         /* Initialize PAM. */
  41         pamc.conv = &openpam_ttyconv;
  42         pam_start(progname, uname, &pamc, &pamh);
  43
  44         /* Authenticate. */
  45         if (PAM_SUCCESS != (retval = pam_authenticate(pamh, 0)))
  46                 goto pamerr;
  47
  48         /* Authorize. */
  49         if (PAM_SUCCESS != (retval = pam_acct_mgmt(pamh, 0)) && PAM_NEW_AUTHTOK_REQD != retval)
  50                 goto pamerr;
  51
  52         printf("Changing password for %s.\n", uname);
  53
  54         /* Change the password. */
  55         if (PAM_SUCCESS != (retval = pam_chauthtok(pamh, 0)))
  56                 goto pamerr;
  57
  58         /* Set the credentials. */
  59         if (PAM_SUCCESS != (retval = pam_setcred(pamh, PAM_ESTABLISH_CRED)))
  60                 goto pamerr;
  61
  62         /* Open the session. */
  63         if (PAM_SUCCESS != (retval = pam_open_session(pamh, 0)))
  64                 goto pamerr;
  65
  66         /* Close the session. */
  67         if (PAM_SUCCESS != (retval = pam_close_session(pamh, 0)))
  68                 goto pamerr;
  69
  70 pamerr:
  71         /* Print an error, if needed. */
  72         if (PAM_SUCCESS != retval)
  73                 fprintf(stderr, "%s: %s\n", progname, pam_strerror(pamh, retval));
  74
  75         /* Terminate PAM. */
  76         pam_end(pamh, retval);
  77         return retval;
  78 }
  79
  80 #endif /* INFO_PAM */