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/*
* MSNT - Microsoft Windows NT domain squid authenticator module
* Version 2.0 by Stellar-X Pty Ltd, Antonino Iannella
* Sun Sep 2 14:39:53 CST 2001
*
* Modified to act as a Squid authenticator module.
* Removed all Pike stuff.
* Returns OK for a successful authentication, or ERR upon error.
*
* Uses code from -
* Andrew Tridgell 1997
* Richard Sharpe 1996
* Bill Welliver 1999
* Duane Wessels 2000 (wessels@squid-cache.org)
*
* Released under GNU Public License
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "util.h"
#include <stdio.h>
#include <signal.h>
#include <syslog.h>
#include <string.h>
#include <sys/time.h>
#include "msntauth.h"
extern char version[];
char msntauth_version[] = "Msntauth v2.0.3 (C) 2 Sep 2001 Stellar-X Antonino Iannella.\nModified by the Squid HTTP Proxy team 26 Jun 2002";
/* Main program for simple authentication.
* Reads the denied user file. Sets alarm timer.
* Scans and checks for Squid input, and attempts to validate the user.
*/
int
main(int argc, char **argv)
{
char username[256];
char password[256];
char wstr[256];
int err = 0;
openlog("msnt_auth", LOG_PID, LOG_USER);
setbuf(stdout, NULL);
/* Read configuration file. Abort wildly if error. */
if (OpenConfigFile() == 1)
return 1;
/*
* Read denied and allowed user files.
* If they fails, there is a serious problem.
* Check syslog messages. Deny all users while in this state.
* The msntauth process should then be killed.
*/
if ((Read_denyusers() == 1) || (Read_allowusers() == 1)) {
while (1) {
memset(wstr, '\0', sizeof(wstr));
fgets(wstr, 255, stdin);
puts("ERR");
}
}
/*
* Make Check_forchange() the handle for HUP signals.
* Don't use alarms any more. I don't think it was very
* portable between systems.
* XXX this should be sigaction()
*/
signal(SIGHUP, Check_forchange);
while (1) {
int n;
/* Read whole line from standard input. Terminate on break. */
memset(wstr, '\0', sizeof(wstr));
if (fgets(wstr, 255, stdin) == NULL)
break;
/* ignore this line if we didn't get the end-of-line marker */
if (NULL == strchr(wstr, '\n')) {
err = 1;
continue;
}
if (err) {
syslog(LOG_WARNING, "oversized message");
goto error;
}
/*
* extract username and password.
* XXX is sscanf() safe?
*/
username[0] = '\0';
password[0] = '\0';
n = sscanf(wstr, "%s %[^\n]", username, password);
if (2 != n) {
puts("ERR");
continue;
}
/* Check for invalid or blank entries */
if ((username[0] == '\0') || (password[0] == '\0')) {
puts("ERR");
continue;
}
Checktimer(); /* Check if the user lists have changed */
rfc1738_unescape(username);
rfc1738_unescape(password);
/*
* Check if user is explicitly denied or allowed.
* If user passes both checks, they can be authenticated.
*/
if (Check_user(username) == 1) {
syslog(LOG_INFO, "'%s' denied", username);
puts("ERR");
} else if (QueryServers(username, password) == 0)
puts("OK");
else {
syslog(LOG_INFO, "'%s' login failed", username);
error:
puts("ERR");
}
err = 0;
}
return 0;
}
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