From b2f54ec4947b60b9d989cb887f6c62c93a738e02 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Tue, 20 May 2008 14:36:04 +0000 Subject: removed openvpn source code --- src/openvpn/proxy.c | 490 ---------------------------------------------------- 1 file changed, 490 deletions(-) delete mode 100644 src/openvpn/proxy.c (limited to 'src/openvpn/proxy.c') diff --git a/src/openvpn/proxy.c b/src/openvpn/proxy.c deleted file mode 100644 index a32e8e1..0000000 --- a/src/openvpn/proxy.c +++ /dev/null @@ -1,490 +0,0 @@ -/* - * OpenVPN -- An application to securely tunnel IP networks - * over a single TCP/UDP port, with support for SSL/TLS-based - * session authentication and key exchange, - * packet encryption, packet authentication, and - * packet compression. - * - * Copyright (C) 2002-2005 OpenVPN Solutions LLC - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * 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 (see the file COPYING included with this - * distribution); if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifdef WIN32 -#include "config-win32.h" -#else -#include "config.h" -#endif - -#ifdef ENABLE_HTTP_PROXY - -#include "syshead.h" - -#include "common.h" -#include "misc.h" -#include "win32.h" -#include "socket.h" -#include "fdmisc.h" -#include "proxy.h" -#include "base64.h" -#include "ntlm.h" - -#include "memdbg.h" - -/* cached proxy username/password */ -static struct user_pass static_proxy_user_pass; - -static bool -recv_line (socket_descriptor_t sd, - char *buf, - int len, - const int timeout_sec, - const bool verbose, - struct buffer *lookahead, - volatile int *signal_received) -{ - struct buffer la; - int lastc = 0; - - CLEAR (la); - if (lookahead) - la = *lookahead; - - while (true) - { - int status; - ssize_t size; - fd_set reads; - struct timeval tv; - uint8_t c; - - if (buf_defined (&la)) - { - ASSERT (buf_init (&la, 0)); - } - - FD_ZERO (&reads); - FD_SET (sd, &reads); - tv.tv_sec = timeout_sec; - tv.tv_usec = 0; - - status = select (sd + 1, &reads, NULL, NULL, &tv); - - get_signal (signal_received); - if (*signal_received) - goto error; - - /* timeout? */ - if (status == 0) - { - if (verbose) - msg (D_LINK_ERRORS | M_ERRNO_SOCK, "recv_line: TCP port read timeout expired"); - goto error; - } - - /* error */ - if (status < 0) - { - if (verbose) - msg (D_LINK_ERRORS | M_ERRNO_SOCK, "recv_line: TCP port read failed on select()"); - goto error; - } - - /* read single char */ - size = recv (sd, &c, 1, MSG_NOSIGNAL); - - /* error? */ - if (size != 1) - { - if (verbose) - msg (D_LINK_ERRORS | M_ERRNO_SOCK, "recv_line: TCP port read failed on recv()"); - goto error; - } - -#if 0 - if (isprint(c)) - msg (M_INFO, "PROXY: read '%c' (%d)", c, (int)c); - else - msg (M_INFO, "PROXY: read (%d)", (int)c); -#endif - - /* store char in buffer */ - if (len > 1) - { - *buf++ = c; - --len; - } - - /* also store char in lookahead buffer */ - if (buf_defined (&la)) - { - buf_write_u8 (&la, c); - if (!isprint(c) && !isspace(c)) /* not ascii? */ - { - if (verbose) - msg (D_LINK_ERRORS | M_ERRNO_SOCK, "recv_line: Non-ASCII character (%d) read on recv()", (int)c); - *lookahead = la; - return false; - } - } - - /* end of line? */ - if (lastc == '\r' && c == '\n') - break; - - lastc = c; - } - - /* append trailing null */ - if (len > 0) - *buf++ = '\0'; - - return true; - - error: - return false; -} - -static bool -send_line (socket_descriptor_t sd, - const char *buf) -{ - const ssize_t size = send (sd, buf, strlen (buf), MSG_NOSIGNAL); - if (size != (ssize_t) strlen (buf)) - { - msg (D_LINK_ERRORS | M_ERRNO_SOCK, "send_line: TCP port write failed on send()"); - return false; - } - return true; -} - -static bool -send_line_crlf (socket_descriptor_t sd, - const char *src) -{ - bool ret; - - struct buffer buf = alloc_buf (strlen (src) + 3); - ASSERT (buf_write (&buf, src, strlen (src))); - ASSERT (buf_write (&buf, "\r\n", 3)); - ret = send_line (sd, BSTR (&buf)); - free_buf (&buf); - return ret; -} - -static bool -send_crlf (socket_descriptor_t sd) -{ - return send_line_crlf (sd, ""); -} - -uint8_t * -make_base64_string2 (const uint8_t *str, int src_len, struct gc_arena *gc) -{ - uint8_t *ret = NULL; - char *b64out = NULL; - ASSERT (base64_encode ((const void *)str, src_len, &b64out) >= 0); - ret = (uint8_t *) string_alloc (b64out, gc); - free (b64out); - return ret; -} - -uint8_t * -make_base64_string (const uint8_t *str, struct gc_arena *gc) -{ - return make_base64_string2 (str, strlen ((const char *)str), gc); -} - -static const char * -username_password_as_base64 (const struct http_proxy_info *p, - struct gc_arena *gc) -{ - struct buffer out = alloc_buf_gc (strlen (p->up.username) + strlen (p->up.password) + 2, gc); - ASSERT (strlen (p->up.username) > 0); - buf_printf (&out, "%s:%s", p->up.username, p->up.password); - return (const char *)make_base64_string ((const uint8_t*)BSTR (&out), gc); -} - -struct http_proxy_info * -new_http_proxy (const struct http_proxy_options *o, - struct gc_arena *gc) -{ - struct http_proxy_info *p; - ALLOC_OBJ_CLEAR_GC (p, struct http_proxy_info, gc); - - if (!o->server) - msg (M_FATAL, "HTTP_PROXY: server not specified"); - - ASSERT (legal_ipv4_port (o->port)); - - p->options = *o; - - /* parse authentication method */ - p->auth_method = HTTP_AUTH_NONE; - if (o->auth_method_string) - { - if (!strcmp (o->auth_method_string, "none")) - p->auth_method = HTTP_AUTH_NONE; - else if (!strcmp (o->auth_method_string, "basic")) - p->auth_method = HTTP_AUTH_BASIC; - else if (!strcmp (o->auth_method_string, "ntlm")) - p->auth_method = HTTP_AUTH_NTLM; - else - msg (M_FATAL, "ERROR: unknown HTTP authentication method: '%s' -- only the 'none', 'basic', or 'ntlm' methods are currently supported", - o->auth_method_string); - } - - /* only basic and NTLM authentication supported so far */ - if (p->auth_method == HTTP_AUTH_BASIC || p->auth_method == HTTP_AUTH_NTLM) - { - get_user_pass (&static_proxy_user_pass, - o->auth_file, - false, - "HTTP Proxy", - GET_USER_PASS_MANAGEMENT); - p->up = static_proxy_user_pass; - } - -#if !NTLM - if (p->auth_method == HTTP_AUTH_NTLM) - msg (M_FATAL, "Sorry, this version of " PACKAGE_NAME " was built without NTLM Proxy support."); -#endif - - p->defined = true; - return p; -} - -void -establish_http_proxy_passthru (struct http_proxy_info *p, - socket_descriptor_t sd, /* already open to proxy */ - const char *host, /* openvpn server remote */ - const int port, /* openvpn server port */ - struct buffer *lookahead, - volatile int *signal_received) -{ - struct gc_arena gc = gc_new (); - char buf[256]; - char buf2[128]; - char get[80]; - int status; - int nparms; - - /* format HTTP CONNECT message */ - openvpn_snprintf (buf, sizeof(buf), "CONNECT %s:%d HTTP/%s", - host, - port, - p->options.http_version); - - msg (D_PROXY, "Send to HTTP proxy: '%s'", buf); - - /* send HTTP CONNECT message to proxy */ - if (!send_line_crlf (sd, buf)) - goto error; - - /* send User-Agent string if provided */ - if (p->options.user_agent) - { - openvpn_snprintf (buf, sizeof(buf), "User-Agent: %s", - p->options.user_agent); - if (!send_line_crlf (sd, buf)) - goto error; - } - - /* auth specified? */ - switch (p->auth_method) - { - case HTTP_AUTH_NONE: - break; - - case HTTP_AUTH_BASIC: - openvpn_snprintf (buf, sizeof(buf), "Proxy-Authorization: Basic %s", - username_password_as_base64 (p, &gc)); - msg (D_PROXY, "Attempting Basic Proxy-Authorization"); - dmsg (D_SHOW_KEYS, "Send to HTTP proxy: '%s'", buf); - openvpn_sleep (1); - if (!send_line_crlf (sd, buf)) - goto error; - break; - -#if NTLM - case HTTP_AUTH_NTLM: - openvpn_snprintf (buf, sizeof(buf), "Proxy-Authorization: NTLM %s", - ntlm_phase_1 (p, &gc)); - msg (D_PROXY, "Attempting NTLM Proxy-Authorization phase 1"); - dmsg (D_SHOW_KEYS, "Send to HTTP proxy: '%s'", buf); - openvpn_sleep (1); - if (!send_line_crlf (sd, buf)) - goto error; - break; -#endif - - default: - ASSERT (0); - } - - /* send empty CR, LF */ - openvpn_sleep (1); - if (!send_crlf (sd)) - goto error; - - /* receive reply from proxy */ - if (!recv_line (sd, buf, sizeof(buf), p->options.timeout, true, NULL, signal_received)) - goto error; - - /* remove trailing CR, LF */ - chomp (buf); - - msg (D_PROXY, "HTTP proxy returned: '%s'", buf); - - /* parse return string */ - nparms = sscanf (buf, "%*s %d", &status); - - /* check for a "407 Proxy Authentication Required" response */ - if (nparms >= 1 && status == 407) - { - msg (D_PROXY, "Proxy requires authentication"); - - /* check for NTLM */ - if (p->auth_method == HTTP_AUTH_NTLM) - { -#if NTLM - /* look for the phase 2 response */ - - while (true) - { - if (!recv_line (sd, buf, sizeof(buf), p->options.timeout, true, NULL, signal_received)) - goto error; - chomp (buf); - msg (D_PROXY, "HTTP proxy returned: '%s'", buf); - - openvpn_snprintf (get, sizeof get, "%%*s NTLM %%%ds", (int) sizeof (buf2) - 1); - nparms = sscanf (buf, get, buf2); - buf2[127] = 0; /* we only need the beginning - ensure it's null terminated. */ - - /* check for "Proxy-Authenticate: NTLM TlRM..." */ - if (nparms == 1) - { - /* parse buf2 */ - msg (D_PROXY, "auth string: '%s'", buf2); - break; - } - } - /* if we are here then auth string was got */ - msg (D_PROXY, "Received NTLM Proxy-Authorization phase 2 response"); - - /* receive and discard everything else */ - while (recv_line (sd, NULL, 0, p->options.timeout, true, NULL, signal_received)) - ; - - /* now send the phase 3 reply */ - - /* format HTTP CONNECT message */ - openvpn_snprintf (buf, sizeof(buf), "CONNECT %s:%d HTTP/%s", - host, - port, - p->options.http_version); - - msg (D_PROXY, "Send to HTTP proxy: '%s'", buf); - - /* send HTTP CONNECT message to proxy */ - if (!send_line_crlf (sd, buf)) - goto error; - - /* send HOST etc, */ - openvpn_sleep (1); - openvpn_snprintf (buf, sizeof(buf), "Host: %s", host); - msg (D_PROXY, "Send to HTTP proxy: '%s'", buf); - if (!send_line_crlf (sd, buf)) - goto error; - - openvpn_snprintf (buf, sizeof(buf), "Proxy-Authorization: NTLM %s", - ntlm_phase_3 (p, buf2, &gc)); - msg (D_PROXY, "Attempting NTLM Proxy-Authorization phase 3"); - msg (D_PROXY, "Send to HTTP proxy: '%s'", buf); - openvpn_sleep (1); - if (!send_line_crlf (sd, buf)) - goto error; - /* ok so far... */ - /* send empty CR, LF */ - openvpn_sleep (1); - if (!send_crlf (sd)) - goto error; - - /* receive reply from proxy */ - if (!recv_line (sd, buf, sizeof(buf), p->options.timeout, true, NULL, signal_received)) - goto error; - - /* remove trailing CR, LF */ - chomp (buf); - - msg (D_PROXY, "HTTP proxy returned: '%s'", buf); - - /* parse return string */ - nparms = sscanf (buf, "%*s %d", &status); -#else - ASSERT (0); /* No NTLM support */ -#endif - } - else goto error; - } - - - /* check return code, success = 200 */ - if (nparms < 1 || status != 200) - { - msg (D_LINK_ERRORS, "HTTP proxy returned bad status"); -#if 0 - /* DEBUGGING -- show a multi-line HTTP error response */ - while (true) - { - if (!recv_line (sd, buf, sizeof (buf), p->options.timeout, true, NULL, signal_received)) - goto error; - chomp (buf); - msg (D_PROXY, "HTTP proxy returned: '%s'", buf); - } -#endif - goto error; - } - - /* receive line from proxy and discard */ - if (!recv_line (sd, NULL, 0, p->options.timeout, true, NULL, signal_received)) - goto error; - - /* - * Toss out any extraneous chars, but don't throw away the - * start of the OpenVPN data stream (put it in lookahead). - */ - while (recv_line (sd, NULL, 0, 2, false, lookahead, signal_received)) - ; - -#if 0 - if (lookahead && BLEN (lookahead)) - msg (M_INFO, "HTTP PROXY: lookahead: %s", format_hex (BPTR (lookahead), BLEN (lookahead), 0)); -#endif - - gc_free (&gc); - return; - - error: - /* on error, should we exit or restart? */ - if (!*signal_received) - *signal_received = (p->options.retry ? SIGUSR1 : SIGTERM); /* SOFT-SIGUSR1 -- HTTP proxy error */ - gc_free (&gc); - return; -} - -#else -static void dummy(void) {} -#endif /* ENABLE_HTTP_PROXY */ -- cgit v1.2.3