132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*-
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* Copyright (c) 2002 Networks Associates Technologies, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <sys/types.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <security/pam_appl.h>
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#include <security/openpam.h>
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/*
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* Simple tty-based conversation function.
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*/
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int
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openpam_ttyconv(int n,
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const struct pam_message **msg,
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struct pam_response **resp,
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void *data)
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{
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char buf[PAM_MAX_RESP_SIZE];
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struct termios tattr;
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tcflag_t lflag;
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int fd, err, i;
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size_t len;
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data = data;
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if (n <= 0 || n > PAM_MAX_NUM_MSG)
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return (PAM_CONV_ERR);
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if ((*resp = calloc(n, sizeof(**resp))) == NULL)
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return (PAM_BUF_ERR);
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fd = fileno(stdin);
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for (i = 0; i < n; ++i) {
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resp[i]->resp_retcode = 0;
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resp[i]->resp = NULL;
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switch (msg[i]->msg_style) {
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case PAM_PROMPT_ECHO_OFF:
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case PAM_PROMPT_ECHO_ON:
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if (msg[i]->msg_style == PAM_PROMPT_ECHO_OFF) {
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if (tcgetattr(fd, &tattr) != 0) {
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openpam_log(PAM_LOG_ERROR,
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"tcgetattr(): %m");
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err = PAM_CONV_ERR;
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goto fail;
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}
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lflag = tattr.c_lflag;
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tattr.c_lflag &= ~ECHO;
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if (tcsetattr(fd, TCSAFLUSH, &tattr) != 0) {
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openpam_log(PAM_LOG_ERROR,
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"tcsetattr(): %m");
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err = PAM_CONV_ERR;
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goto fail;
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}
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}
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fputs(msg[i]->msg, stderr);
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buf[0] = '\0';
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fgets(buf, sizeof(buf), stdin);
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if (msg[i]->msg_style == PAM_PROMPT_ECHO_OFF) {
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tattr.c_lflag = lflag;
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(void)tcsetattr(fd, TCSANOW, &tattr);
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fputs("\n", stderr);
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}
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if (ferror(stdin)) {
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err = PAM_CONV_ERR;
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goto fail;
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}
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for (len = strlen(buf); len > 0; --len)
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if (!isspace(buf[len - 1]))
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break;
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buf[len] = '\0';
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if ((resp[i]->resp = strdup(buf)) == NULL) {
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err = PAM_BUF_ERR;
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goto fail;
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}
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break;
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case PAM_ERROR_MSG:
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fputs(msg[i]->msg, stderr);
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break;
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case PAM_TEXT_INFO:
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fputs(msg[i]->msg, stdout);
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break;
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default:
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err = PAM_BUF_ERR;
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goto fail;
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}
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}
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return (PAM_SUCCESS);
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fail:
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while (i)
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free(resp[--i]);
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free(*resp);
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*resp = NULL;
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return (err);
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}
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