contrib/openpam/lib/pam_set_item.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by ThinkSec AS and
   6  * Network Associates Laboratories, the Security Research Division of
   7  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
   8  * ("CBOSS"), as part of the DARPA CHATS research program.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote
  19  *    products derived from this software without specific prior written
  20  *    permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $P4: //depot/projects/openpam/lib/pam_set_item.c#21 $
  35  */
  36
  37 #include <sys/param.h>
  38
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #include <security/pam_appl.h>
  43
  44 #include "openpam_impl.h"
  45
  46 /*
  47  * XSSO 4.2.1
  48  * XSSO 6 page 60
  49  *
  50  * Set authentication information
  51  */
  52
  53 int
  54 pam_set_item(pam_handle_t *pamh,
  55         int item_type,
  56         const void *item)
  57 {
  58         void **slot, *tmp;
  59         size_t nsize, osize;
  60
  61         ENTERI(item_type);
  62         if (pamh == NULL)
  63                 RETURNC(PAM_SYSTEM_ERR);
  64         slot = &pamh->item[item_type];
  65         osize = nsize = 0;
  66         switch (item_type) {
  67         case PAM_SERVICE:
  68         case PAM_USER:
  69         case PAM_AUTHTOK:
  70         case PAM_OLDAUTHTOK:
  71         case PAM_TTY:
  72         case PAM_RHOST:
  73         case PAM_RUSER:
  74         case PAM_USER_PROMPT:
  75         case PAM_AUTHTOK_PROMPT:
  76         case PAM_OLDAUTHTOK_PROMPT:
  77                 if (*slot != NULL)
  78                         osize = strlen(*slot) + 1;
  79                 if (item != NULL)
  80                         nsize = strlen(item) + 1;
  81                 break;
  82         case PAM_REPOSITORY:
  83                 osize = nsize = sizeof(struct pam_repository);
  84                 break;
  85         case PAM_CONV:
  86                 osize = nsize = sizeof(struct pam_conv);
  87                 break;
  88         default:
  89                 RETURNC(PAM_SYMBOL_ERR);
  90         }
  91         if (*slot != NULL) {
  92                 memset(*slot, 0xd0, osize);
  93                 FREE(*slot);
  94         }
  95         if (item != NULL) {
  96                 if ((tmp = malloc(nsize)) == NULL)
  97                         RETURNC(PAM_BUF_ERR);
  98                 memcpy(tmp, item, nsize);
  99         } else {
 100                 tmp = NULL;
 101         }
 102         *slot = tmp;
 103         RETURNC(PAM_SUCCESS);
 104 }
 105
 106 /*
 107  * Error codes:
 108  *
 109  *      PAM_SYMBOL_ERR
 110  *      PAM_SYSTEM_ERR
 111  *      PAM_BUF_ERR
 112  */
 113
 114 /**
 115  * The =pam_set_item function sets the item specified by the =item_type
 116  * argument to a copy of the object pointed to by the =item argument.
 117  * The item is stored in the PAM context specified by the =pamh argument.
 118  * See =pam_get_item for a list of recognized item types.
 119  */