contrib/openpam/lib/pam_set_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_set_data.c 408 2007-12-21 11:36:24Z des $
  36  */
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #include <security/pam_appl.h>
  42
  43 #include "openpam_impl.h"
  44
  45 /*
  46  * XSSO 4.2.1
  47  * XSSO 6 page 59
  48  *
  49  * Set module information
  50  */
  51
  52 int
  53 pam_set_data(pam_handle_t *pamh,
  54         const char *module_data_name,
  55         void *data,
  56         void (*cleanup)(pam_handle_t *pamh,
  57                 void *data,
  58                 int pam_end_status))
  59 {
  60         pam_data_t *dp;
  61
  62         ENTERS(module_data_name);
  63         if (pamh == NULL)
  64                 RETURNC(PAM_SYSTEM_ERR);
  65         for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
  66                 if (strcmp(dp->name, module_data_name) == 0) {
  67                         if (dp->cleanup)
  68                                 (dp->cleanup)(pamh, dp->data, PAM_SUCCESS);
  69                         dp->data = data;
  70                         dp->cleanup = cleanup;
  71                         RETURNC(PAM_SUCCESS);
  72                 }
  73         }
  74         if ((dp = malloc(sizeof *dp)) == NULL)
  75                 RETURNC(PAM_BUF_ERR);
  76         if ((dp->name = strdup(module_data_name)) == NULL) {
  77                 FREE(dp);
  78                 RETURNC(PAM_BUF_ERR);
  79         }
  80         dp->data = data;
  81         dp->cleanup = cleanup;
  82         dp->next = pamh->module_data;
  83         pamh->module_data = dp;
  84         RETURNC(PAM_SUCCESS);
  85 }
  86
  87 /*
  88  * Error codes:
  89  *
  90  *      PAM_SYSTEM_ERR
  91  *      PAM_BUF_ERR
  92  */
  93
  94 /**
  95  * The =pam_set_data function associates a pointer to an opaque object
  96  * with an arbitrary string specified by the =module_data_name argument,
  97  * in the PAM context specified by the =pamh argument.
  98  *
  99  * If not =NULL, the =cleanup argument should point to a function
 100  * responsible for releasing the resources associated with the object.
 101  *
 102  * This function and its counterpart =pam_get_data are useful for managing
 103  * data that are meaningful only to a particular service module.
 104  */