dist/openpam/lib/pam_get_data.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * Copyright (c) 2004-2007 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_get_data.c,v 1.4 2008/01/27 01:23:00 christos Exp $
  36  */
  37
  38 #include <string.h>
  39
  40 #include <security/pam_appl.h>
  41
  42 #include "openpam_impl.h"
  43
  44 /*
  45  * XSSO 4.2.1
  46  * XSSO 6 page 43
  47  *
  48  * Get module information
  49  */
  50
  51 int
  52 pam_get_data(const pam_handle_t *pamh,
  53         const char *module_data_name,
  54         const void **data)
  55 {
  56         pam_data_t *dp;
  57
  58         ENTERS(module_data_name);
  59         if (pamh == NULL)
  60                 RETURNC(PAM_SYSTEM_ERR);
  61         for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
  62                 if (strcmp(dp->name, module_data_name) == 0) {
  63                         *data = (void *)dp->data;
  64                         RETURNC(PAM_SUCCESS);
  65                 }
  66         }
  67         RETURNC(PAM_NO_MODULE_DATA);
  68         /*NOTREACHED*/
  69 }
  70
  71 /*
  72  * Error codes:
  73  *
  74  *      PAM_SYSTEM_ERR
  75  *      PAM_NO_MODULE_DATA
  76  */
  77
  78 /**
  79  * The =pam_get_data function looks up the opaque object associated with
  80  * the string specified by the =module_data_name argument, in the PAM
  81  * context specified by the =pamh argument.
  82  * A pointer to the object is stored in the location pointed to by the
  83  * =data argument.
  84  *
  85  * This function and its counterpart =pam_set_data are useful for managing
  86  * data that are meaningful only to a particular service module.
  87  */