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/*-
* 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_vprompt.c 437 2011-09-13 12:00:13Z des $
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <security/pam_appl.h>
#include "openpam_impl.h"
/*
* OpenPAM extension
*
* Call the conversation function
*/
int
pam_vprompt(const pam_handle_t *pamh,
int style,
char **resp,
const char *fmt,
va_list ap)
{
char msgbuf[PAM_MAX_MSG_SIZE];
struct pam_message msg;
const struct pam_message *msgp;
struct pam_response *rsp;
const struct pam_conv *conv;
const void *convp;
int r;
ENTER();
r = pam_get_item(pamh, PAM_CONV, &convp);
if (r != PAM_SUCCESS)
RETURNC(r);
conv = convp;
if (conv == NULL || conv->conv == NULL) {
openpam_log(PAM_LOG_ERROR, "no conversation function");
RETURNC(PAM_SYSTEM_ERR);
}
vsnprintf(msgbuf, PAM_MAX_MSG_SIZE, fmt, ap);
msg.msg_style = style;
msg.msg = msgbuf;
msgp = &msg;
rsp = NULL;
r = (conv->conv)(1, &msgp, &rsp, conv->appdata_ptr);
*resp = rsp == NULL ? NULL : rsp->resp;
FREE(rsp);
RETURNC(r);
}
/*
* Error codes:
*
* !PAM_SYMBOL_ERR
* PAM_SYSTEM_ERR
* PAM_BUF_ERR
* PAM_CONV_ERR
*/
/**
* The =pam_vprompt function constructs a string from the =fmt and =ap
* arguments using =vsnprintf, and passes it to the given PAM context's
* conversation function.
*
* The =style argument specifies the type of interaction requested, and
* must be one of the following:
*
* =PAM_PROMPT_ECHO_OFF:
* Display the message and obtain the user's response without
* displaying it.
* =PAM_PROMPT_ECHO_ON:
* Display the message and obtain the user's response.
* =PAM_ERROR_MSG:
* Display the message as an error message, and do not wait
* for a response.
* =PAM_TEXT_INFO:
* Display the message as an informational message, and do
* not wait for a response.
*
* A pointer to the response, or =NULL if the conversation function did
* not return one, is stored in the location pointed to by the =resp
* argument.
*
* The message and response should not exceed =PAM_MAX_MSG_SIZE or
* =PAM_MAX_RESP_SIZE, respectively.
* If they do, they may be truncated.
*
* >pam_error
* >pam_info
* >pam_prompt
* >pam_verror
* >pam_vinfo
*/
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