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michael |
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/* vim: set shiftwidth=3 softtabstop=3 expandtab: */ |
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/* Copyright (C) 2002 Erik Fears |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to |
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* |
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* The Free Software Foundation, Inc. |
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* 59 Temple Place - Suite 330 |
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* Boston, MA 02111-1307, USA. |
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* |
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* |
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*/ |
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#include "setup.h" |
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#include <stdio.h> |
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#ifdef STDC_HEADERS |
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# include <stdlib.h> |
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# include <string.h> |
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#endif |
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#include "inet.h" |
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#include "compat.h" |
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#include "config.h" |
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#include "proxy.h" |
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#include "opm_common.h" |
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#include "opm_types.h" |
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#include "opm_error.h" |
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#include "libopm.h" |
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static char SENDBUF[SENDBUFLEN + 1]; |
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int libopm_proxy_http_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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snprintf(SENDBUF, SENDBUFLEN, "CONNECT %s:%d HTTP/1.0\r\n\r\n", |
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(char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP), |
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*(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT)); |
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if(send(conn->fd, SENDBUF, strlen(SENDBUF), 0) == -1) |
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return 0; /* Return error code ? */ |
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return OPM_SUCCESS; |
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} |
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/* |
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* CONNECT request byte order for socks4 |
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* |
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* +----+----+----+----+----+----+----+----+----+----+....+----+ |
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* | VN | CD | DSTPORT | DSTIP | USERID |NULL| |
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* +----+----+----+----+----+----+----+----+----+----+....+----+ |
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* # of bytes: 1 1 2 4 variable 1 |
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* |
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* VN = Version, CD = Command Code (1 is connect request) |
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*/ |
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int libopm_proxy_socks4_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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struct in_addr addr; |
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unsigned long laddr; |
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int len, scan_port; |
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char *scan_ip; |
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scan_ip = (char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP); |
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scan_port = *(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT); |
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if (inet_aton(scan_ip, &addr) == 0) |
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; /* handle error */ |
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laddr = htonl(addr.s_addr); |
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len = snprintf(SENDBUF, SENDBUFLEN, "%c%c%c%c%c%c%c%c%c", 4, 1, |
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(((unsigned short) scan_port) >> 8) & 0xFF, |
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(((unsigned short) scan_port) & 0xFF), |
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(char) (laddr >> 24) & 0xFF, (char) (laddr >> 16) & 0xFF, |
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(char) (laddr >> 8) & 0xFF, (char) laddr & 0xFF, 0); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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return OPM_SUCCESS; |
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} |
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/* |
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* Send version authentication selection message to socks5 |
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* |
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* +----+----------+----------+ |
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* |VER | NMETHODS | METHODS | |
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* +----+----------+----------+ |
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* | 1 | 1 | 1 to 255 | |
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* +----+----------+----------+ |
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* |
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* VER always contains 5, for socks version 5 |
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* Method 0 is 'No authentication required' |
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* |
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* |
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* |
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* The SOCKS request is formed as follows: |
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* |
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* +----+-----+-------+------+----------+----------+ |
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* |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT | |
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* +----+-----+-------+------+----------+----------+ |
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* | 1 | 1 | X'00' | 1 | Variable | 2 | |
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* +----+-----+-------+------+----------+----------+ |
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* |
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* |
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* o VER protocol version: X'05' |
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* o CMD |
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* o CONNECT X'01' |
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* o BIND X'02' |
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* o UDP ASSOCIATE X'03' |
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* o RSV RESERVED |
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* o ATYP address type of following address |
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* o IP V4 address: X'01' |
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* o DOMAINNAME: X'03' |
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* o IP V6 address: X'04' |
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* o DST.ADDR desired destination address |
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* o DST.PORT desired destination port in network octet |
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* order |
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* |
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* |
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*/ |
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int libopm_proxy_socks5_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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struct in_addr addr; |
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unsigned long laddr; |
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int len, scan_port; |
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char *scan_ip; |
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scan_ip = (char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP); |
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scan_port = *(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT); |
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if (inet_aton(scan_ip, &addr) == 0) |
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; /* handle error */ |
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laddr = htonl(addr.s_addr); |
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/* Form authentication string */ |
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/* Version 5, 1 number of methods, 0 method (no auth). */ |
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len = snprintf(SENDBUF, SENDBUFLEN, "%c%c%c", 5, 1, 0); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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/* Form request string */ |
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/* Will need to write ipv6 support here in future |
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* as socks5 is ipv6 compatible |
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*/ |
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len = snprintf(SENDBUF, SENDBUFLEN, "%c%c%c%c%c%c%c%c%c%c", 5, 1, 0, 1, |
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(char) (laddr >> 24) & 0xFF, (char) (laddr >> 16) & 0xFF, |
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(char) (laddr >> 8) & 0xFF, (char) laddr & 0xFF, |
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(((unsigned short) scan_port) >> 8) & 0xFF, |
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(((unsigned short) scan_port) & 0xFF)); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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return OPM_SUCCESS; |
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} |
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/* |
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* Open wingates require no authentication, they will send a prompt when |
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* connect. |
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*/ |
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int libopm_proxy_wingate_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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int scan_port, len; |
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char *scan_ip; |
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scan_ip = (char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP); |
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scan_port = *(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT); |
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len = snprintf(SENDBUF, SENDBUFLEN, "%s:%d\r\n", scan_ip, scan_port); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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return OPM_SUCCESS; |
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} |
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/* |
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* Cisco scanning |
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* |
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* Some cisco routers have 'cisco' set as password which allow open telnet |
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* relay. Attempt to connect using cisco as a password, then give command for |
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* telnet to the scanip/scanport |
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*/ |
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int libopm_proxy_router_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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int len, scan_port; |
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char *scan_ip; |
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scan_ip = (char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP); |
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scan_port = *(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT); |
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len = snprintf(SENDBUF, SENDBUFLEN, "cisco\r\n"); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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len = snprintf(SENDBUF, SENDBUFLEN, "telnet %s %d\r\n", scan_ip, scan_port); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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return OPM_SUCCESS; |
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} |
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/* |
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* HTTP POST Scanning |
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* |
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*/ |
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int libopm_proxy_httppost_write(OPM_T *scanner, OPM_SCAN_T *scan, OPM_CONNECTION_T *conn) |
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{ |
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int len, scan_port; |
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char *scan_ip; |
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scan_ip = (char *) libopm_config(scanner->config, OPM_CONFIG_SCAN_IP); |
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scan_port = *(int *) libopm_config(scanner->config, OPM_CONFIG_SCAN_PORT); |
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len = snprintf(SENDBUF, SENDBUFLEN, "POST http://%s:%d/ HTTP/1.0\r\n" |
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"Content-type: text/plain\r\n" |
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"Content-length: 5\r\n\r\n" |
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"quit\r\n\r\n", |
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scan_ip, scan_port); |
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send(conn->fd, SENDBUF, (unsigned int)len, 0); |
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return OPM_SUCCESS; |
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} |