contrib/openpam/lib/pam_set_item.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * Copyright (c) 2004-2011 Dag-Erling Smørgrav
   4  * All rights reserved.
   5  *
   6  * This software was developed for the FreeBSD Project by ThinkSec AS and
   7  * Network Associates Laboratories, the Security Research Division of
   8  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
   9  * ("CBOSS"), as part of the DARPA CHATS research program.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote
  20  *    products derived from this software without specific prior written
  21  *    permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $Id: pam_set_item.c 496 2011-11-21 16:20:45Z des $
  36  */
  37
  38 #ifdef HAVE_CONFIG_H
  39 # include "config.h"
  40 #endif
  41
  42 #include <sys/param.h>
  43
  44 #include <stdlib.h>
  45 #include <string.h>
  46
  47 #include <security/pam_appl.h>
  48
  49 #include "openpam_impl.h"
  50
  51 /*
  52  * XSSO 4.2.1
  53  * XSSO 6 page 60
  54  *
  55  * Set authentication information
  56  */
  57
  58 int
  59 pam_set_item(pam_handle_t *pamh,
  60         int item_type,
  61         const void *item)
  62 {
  63         void **slot, *tmp;
  64         size_t nsize, osize;
  65
  66         ENTERI(item_type);
  67         if (pamh == NULL)
  68                 RETURNC(PAM_SYSTEM_ERR);
  69         slot = &pamh->item[item_type];
  70         osize = nsize = 0;
  71         switch (item_type) {
  72         case PAM_SERVICE:
  73                 /* set once only, by pam_start() */
  74                 if (*slot != NULL)
  75                         RETURNC(PAM_SYSTEM_ERR);
  76                 /* fall through */
  77         case PAM_USER:
  78         case PAM_AUTHTOK:
  79         case PAM_OLDAUTHTOK:
  80         case PAM_TTY:
  81         case PAM_RHOST:
  82         case PAM_RUSER:
  83         case PAM_USER_PROMPT:
  84         case PAM_AUTHTOK_PROMPT:
  85         case PAM_OLDAUTHTOK_PROMPT:
  86         case PAM_HOST:
  87                 if (*slot != NULL)
  88                         osize = strlen(*slot) + 1;
  89                 if (item != NULL)
  90                         nsize = strlen(item) + 1;
  91                 break;
  92         case PAM_REPOSITORY:
  93                 osize = nsize = sizeof(struct pam_repository);
  94                 break;
  95         case PAM_CONV:
  96                 osize = nsize = sizeof(struct pam_conv);
  97                 break;
  98         default:
  99                 RETURNC(PAM_SYMBOL_ERR);
 100         }
 101         if (*slot != NULL) {
 102                 memset(*slot, 0xd0, osize);
 103                 FREE(*slot);
 104         }
 105         if (item != NULL) {
 106                 if ((tmp = malloc(nsize)) == NULL)
 107                         RETURNC(PAM_BUF_ERR);
 108                 memcpy(tmp, item, nsize);
 109         } else {
 110                 tmp = NULL;
 111         }
 112         *slot = tmp;
 113         RETURNC(PAM_SUCCESS);
 114 }
 115
 116 /*
 117  * Error codes:
 118  *
 119  *      PAM_SYMBOL_ERR
 120  *      PAM_SYSTEM_ERR
 121  *      PAM_BUF_ERR
 122  */
 123
 124 /**
 125  * The =pam_set_item function sets the item specified by the =item_type
 126  * argument to a copy of the object pointed to by the =item argument.
 127  * The item is stored in the PAM context specified by the =pamh argument.
 128  * See =pam_get_item for a list of recognized item types.
 129  */