text: /*-
   * Copyright (c) 2001,2003 Networks Associates Technology, 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.
   *
   * $FreeBSD: src/lib/libpam/modules/pam_echo/pam_echo.c,v 1.4 2003/12/11 13:55:15 des Exp $
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include <security/pam_appl.h>
  #include <security/pam_modules.h>
  #include <security/openpam.h>
  
  static int
  _pam_echo(pam_handle_t *pamh, int flags, int argc, const char *argv[])
  {
  	char msg[PAM_MAX_MSG_SIZE];
  	const void *str;
  	const char *p, *q;
  	int err, i, item;
  	size_t len;
  
  	if (flags & PAM_SILENT)
  		return (PAM_SUCCESS);
  	for (i = 0, len = 0; i < argc && len < sizeof(msg) - 1; ++i) {
  		if (i > 0)
  			msg[len++] = ' ';
  		for (p = argv[i]; *p != '\0' && len < sizeof(msg) - 1; ++p) {
  			if (*p != '%' || p[1] == '\0') {
  				msg[len++] = *p;
  				continue;
  			}
  			switch (*++p) {
  			case 'H':
  				item = PAM_RHOST;
  				break;
  			case 'h':
  				/* not implemented */
  				item = -1;
  				break;
  			case 's':
  				item = PAM_SERVICE;
  				break;
  			case 't':
  				item = PAM_TTY;
  				break;
  			case 'U':
  				item = PAM_RUSER;
  				break;
  			case 'u':
  				item = PAM_USER;
  				break;
  			default:
  				item = -1;
  				msg[len++] = *p;
  				break;
  			}
  			if (item == -1)
  				continue;
  			err = pam_get_item(pamh, item, &str);
  			if (err != PAM_SUCCESS)
  				return (err);
  			if (str == NULL)
  				str = "(null)";
  			for (q = str; *q != '\0' && len < sizeof(msg) - 1; ++q)
  				msg[len++] = *q;
  		}
  	}
  	msg[len] = '\0';
  	return (pam_info(pamh, "%s", msg));
  }
  
  PAM_EXTERN int
  pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char *argv[])
  {
  
  	return (_pam_echo(pamh, flags, argc, argv));
  }
  
  PAM_EXTERN int
  pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
  	       int argc __unused, const char *argv[] __unused)
  {
  
  	return (PAM_SUCCESS);
  }
  
  PAM_EXTERN int
  pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char *argv[])
  {
  
  	return (_pam_echo(pamh, flags, argc, argv));
  }
  
  PAM_EXTERN int
  pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char *argv[])
  {
  
  	return (_pam_echo(pamh, flags, argc, argv));
  }
  
  PAM_EXTERN int
  pam_sm_close_session(pam_handle_t *pamh, int flags,
  		     int argc, const char *argv[])
  {
  
  	return (_pam_echo(pamh, flags, argc, argv));
  }
  
  PAM_EXTERN int
  pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char *argv[])
  {
  
  	if (flags & PAM_PRELIM_CHECK)
  		return (PAM_SUCCESS);
  	return (_pam_echo(pamh, flags, argc, argv));
  }
  
  PAM_MODULE_ENTRY("pam_echo");
  