2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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
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
35 * $Id: pam_vprompt.c 648 2013-03-05 17:54:27Z des $
46 #include <security/pam_appl.h>
48 #include "openpam_impl.h"
53 * Call the conversation function
57 pam_vprompt(const pam_handle_t *pamh,
63 char msgbuf[PAM_MAX_MSG_SIZE];
64 struct pam_message msg;
65 const struct pam_message *msgp;
66 struct pam_response *rsp;
67 const struct pam_conv *conv;
72 r = pam_get_item(pamh, PAM_CONV, &convp);
76 if (conv == NULL || conv->conv == NULL) {
77 openpam_log(PAM_LOG_ERROR, "no conversation function");
78 RETURNC(PAM_SYSTEM_ERR);
80 vsnprintf(msgbuf, PAM_MAX_MSG_SIZE, fmt, ap);
81 msg.msg_style = style;
85 r = (conv->conv)(1, &msgp, &rsp, conv->appdata_ptr);
86 *resp = rsp == NULL ? NULL : rsp->resp;
101 * The =pam_vprompt function constructs a string from the =fmt and =ap
102 * arguments using =vsnprintf, and passes it to the given PAM context's
103 * conversation function.
105 * The =style argument specifies the type of interaction requested, and
106 * must be one of the following:
108 * =PAM_PROMPT_ECHO_OFF:
109 * Display the message and obtain the user's response without
111 * =PAM_PROMPT_ECHO_ON:
112 * Display the message and obtain the user's response.
114 * Display the message as an error message, and do not wait
117 * Display the message as an informational message, and do
118 * not wait for a response.
120 * A pointer to the response, or =NULL if the conversation function did
121 * not return one, is stored in the location pointed to by the =resp
124 * The message and response should not exceed =PAM_MAX_MSG_SIZE or
125 * =PAM_MAX_RESP_SIZE, respectively.
126 * If they do, they may be truncated.