source: openpam/trunk/lib/pam_prompt.c @ 16

/*-
 * Copyright (c) 2002 Networks Associates Technologies, Inc.
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by ThinkSec AS and
 * NAI Labs, 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.
 *
 * $Id$
 */

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>

#include <security/pam_appl.h>

/*
 * OpenPAM extension
 *
 * Prompt the user for information
 */

int
pam_prompt(pam_handle_t *pamh,
        char **resp,
        int echo,
        const char *fmt,
        ...)
{
        char msgbuf[PAM_MAX_MSG_SIZE];
        struct pam_message msg;
        const struct pam_message *msgp;
        struct pam_response *rsp;
        struct pam_conv conv;
        va_list ap;
        int r;

        if ((r = pam_get_item(pamh, PAM_CONV, (void *)&conv)) != PAM_SUCCESS)
                return (r);
        va_start(ap, fmt);
        vsnprintf(msgbuf, PAM_MAX_MSG_SIZE, fmt, ap);
        va_end(ap);
        msg.msg_style = echo ? PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF;
        msg.msg = msgbuf;
        msgp = &msg;
        r = (conv.conv)(1, &msgp, &rsp, conv.appdata_ptr);
        *resp = rsp == NULL ? NULL : rsp->resp;
        free(rsp);
        return (r);
}