chkpasswd.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
  25 #include <security/pam_appl.h>
  26 #include <security/openpam.h>   /* for openpam_ttyconv() */
  27
  28 #include "passwd.h"
  29
  30 extern char* progname;
  31 static pam_handle_t *pamh;
  32 static struct pam_conv pamc;
  33
  34 //-------------------------------------------------------------------------------------
  35 //      pam_check_passwd
  36 //-------------------------------------------------------------------------------------
  37
  38 int
  39 pam_check_passwd(char* uname)
  40 {
  41         int retval = PAM_SUCCESS;
  42
  43         /* Initialize PAM. */
  44         pamc.conv = &openpam_ttyconv;
  45         pam_start(progname, uname, &pamc, &pamh);
  46
  47         printf("Checking password for %s.\n", uname);
  48
  49         /* Authenticate. */
  50         if (PAM_SUCCESS != (retval = pam_authenticate(pamh, 0)))
  51                 goto pamerr;
  52
  53         /* Authorize. */
  54         if (PAM_SUCCESS != (retval = pam_acct_mgmt(pamh, 0)) && PAM_NEW_AUTHTOK_REQD != retval)
  55                 goto pamerr;
  56
  57         /* Change the password. */
  58         if (PAM_NEW_AUTHTOK_REQD == retval && PAM_SUCCESS != (retval = pam_chauthtok(pamh, 0)))
  59                 goto pamerr;
  60
  61         /* Set the credentials. */
  62         if (PAM_SUCCESS != (retval = pam_setcred(pamh, PAM_ESTABLISH_CRED)))
  63                 goto pamerr;
  64
  65         /* Open the session. */
  66         if (PAM_SUCCESS != (retval = pam_open_session(pamh, 0)))
  67                 goto pamerr;
  68
  69         /* Close the session. */
  70         if (PAM_SUCCESS != (retval = pam_close_session(pamh, 0)))
  71                 goto pamerr;
  72
  73 pamerr:
  74         /* Print an error, if needed. */
  75         if (PAM_SUCCESS != retval)
  76                 fprintf(stderr, "Sorry\n");
  77
  78         /* Terminate PAM. */
  79         pam_end(pamh, retval);
  80         return retval;
  81 }