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/* twoftpd-auth.c - Authentication front-end for twoftpd
* Copyright (C) 2005 Bruce Guenter <bruceg@em.ca>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sysdeps.h>
#include <cvm/client.h>
#include "twoftpd.h"
const char program[] = "twoftpd-auth";
static char** argv_xfer = 0;
static const char* user = 0;
static const char* cvmodule = 0;
static const char* creds[2];
static void do_exec()
{
alarm(0);
if (putenv("AUTHENTICATED=1") == 0
&& cvm_setenv())
execvp(argv_xfer[0], argv_xfer);
respond(421, 1, "Could not execute back-end.");
exit(1);
}
static int handle_user(void)
{
if (user) free((char*)user);
user = strdup(req_param);
return respond(331, 1, "Send PASS.");
}
static int handle_pass(void)
{
if (!user) return respond(503, 1, "Send USER first.");
creds[0] = req_param;
creds[1] = 0;
if (cvm_authenticate(cvmodule, user, getenv("TCPLOCALHOST"), creds, 1) == 0)
do_exec();
free((char*)user);
user = 0;
return respond(530, 1, "Authentication failed.");
}
const command verbs[] = {
{ "USER", 0, 0, handle_user },
{ "PASS", 1, 0, handle_pass },
{ 0, 0, 0, 0 }
};
const command site_commands[] = {
{ 0, 0, 0, 0 }
};
int startup(int argc, char* argv[])
{
const char* tmp;
unsigned long auth_timeout;
if (argc < 3) {
respond(421, 1, "Configuration error, insufficient paramenters.");
return 0;
}
cvmodule = argv[1];
argv_xfer = argv + 2;
if (!getenv("SERVICE") && putenv("SERVICE=ftp") == -1) {
respond(421, 1, "Error setting $SERVICE.");
return 0;
}
if ((tmp = getenv("LOGINBANNER")) != 0) show_banner(220, tmp);
auth_timeout = 0;
if ((tmp = getenv("AUTH_TIMEOUT")) != 0) auth_timeout = strtou(tmp, &tmp);
alarm(auth_timeout);
return respond(220, 0, "TwoFTPd server ready.") &&
respond(220, 1, "Authenticate first.");
}
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