freebsd-dev/contrib/openpam/lib/libpam/pam_get_data.c

/*-
 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by ThinkSec AS and
 * Network Associates Laboratories, the Security Research Division of
 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
 * ("CBOSS"), as part of the DARPA CHATS research program.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: pam_get_data.c 913 2017-01-21 15:11:12Z des $
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <string.h>

#include <security/pam_appl.h>

#include "openpam_impl.h"

/*
 * XSSO 4.2.1
 * XSSO 6 page 43
 *
 * Get module information
 */

int
pam_get_data(const pam_handle_t *pamh,
	const char *module_data_name,
	const void **data)
{
	pam_data_t *dp;

	ENTERS(module_data_name);
	for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
		if (strcmp(dp->name, module_data_name) == 0) {
			*data = (void *)dp->data;
			RETURNC(PAM_SUCCESS);
		}
	}
	RETURNC(PAM_NO_MODULE_DATA);
}

/*
 * Error codes:
 *
 *	PAM_NO_MODULE_DATA
 */

/**
 * The =pam_get_data function looks up the opaque object associated with
 * the string specified by the =module_data_name argument, in the PAM
 * context specified by the =pamh argument.
 * A pointer to the object is stored in the location pointed to by the
 * =data argument.
 * If =pam_get_data fails, the =data argument is untouched.
 *
 * This function and its counterpart =pam_set_data are useful for managing
 * data that are meaningful only to a particular service module.
 */