X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=libeap%2Fsrc%2Feap_server%2Feap_server_tnc.c;fp=libeap%2Fsrc%2Feap_server%2Feap_server_tnc.c;h=0000000000000000000000000000000000000000;hb=38791e2c8e2c94ed906593931831bda6577d5346;hp=a2d6f170883837d2d9e3cdaa3b7b6b4dcb40b908;hpb=1d91db0ace57f0b63665c0303eae0b347debaef7;p=mech_eap.git

diff --git a/libeap/src/eap_server/eap_server_tnc.c b/libeap/src/eap_server/eap_server_tnc.c
deleted file mode 100644
index a2d6f17..0000000
--- a/libeap/src/eap_server/eap_server_tnc.c
+++ /dev/null
@@ -1,582 +0,0 @@
-/*
- * EAP server method: EAP-TNC (Trusted Network Connect)
- * Copyright (c) 2007-2010, Jouni Malinen <j@w1.fi>
- *
- * 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.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "includes.h"
-
-#include "common.h"
-#include "base64.h"
-#include "eap_i.h"
-#include "tncs.h"
-
-
-struct eap_tnc_data {
-	enum eap_tnc_state {
-		START, CONTINUE, RECOMMENDATION, FRAG_ACK, WAIT_FRAG_ACK, DONE,
-		FAIL
-	} state;
-	enum { ALLOW, ISOLATE, NO_ACCESS, NO_RECOMMENDATION } recommendation;
-	struct tncs_data *tncs;
-	struct wpabuf *in_buf;
-	struct wpabuf *out_buf;
-	size_t out_used;
-	size_t fragment_size;
-	unsigned int was_done:1;
-	unsigned int was_fail:1;
-};
-
-
-/* EAP-TNC Flags */
-#define EAP_TNC_FLAGS_LENGTH_INCLUDED 0x80
-#define EAP_TNC_FLAGS_MORE_FRAGMENTS 0x40
-#define EAP_TNC_FLAGS_START 0x20
-#define EAP_TNC_VERSION_MASK 0x07
-
-#define EAP_TNC_VERSION 1
-
-
-static const char * eap_tnc_state_txt(enum eap_tnc_state state)
-{
-	switch (state) {
-	case START:
-		return "START";
-	case CONTINUE:
-		return "CONTINUE";
-	case RECOMMENDATION:
-		return "RECOMMENDATION";
-	case FRAG_ACK:
-		return "FRAG_ACK";
-	case WAIT_FRAG_ACK:
-		return "WAIT_FRAG_ACK";
-	case DONE:
-		return "DONE";
-	case FAIL:
-		return "FAIL";
-	}
-	return "??";
-}
-
-
-static void eap_tnc_set_state(struct eap_tnc_data *data,
-			      enum eap_tnc_state new_state)
-{
-	wpa_printf(MSG_DEBUG, "EAP-TNC: %s -> %s",
-		   eap_tnc_state_txt(data->state),
-		   eap_tnc_state_txt(new_state));
-	data->state = new_state;
-}
-
-
-static void * eap_tnc_init(struct eap_sm *sm)
-{
-	struct eap_tnc_data *data;
-
-	data = os_zalloc(sizeof(*data));
-	if (data == NULL)
-		return NULL;
-	eap_tnc_set_state(data, START);
-	data->tncs = tncs_init();
-	if (data->tncs == NULL) {
-		os_free(data);
-		return NULL;
-	}
-
-	data->fragment_size = sm->fragment_size > 100 ?
-		sm->fragment_size - 98 : 1300;
-
-	return data;
-}
-
-
-static void eap_tnc_reset(struct eap_sm *sm, void *priv)
-{
-	struct eap_tnc_data *data = priv;
-	wpabuf_free(data->in_buf);
-	wpabuf_free(data->out_buf);
-	tncs_deinit(data->tncs);
-	os_free(data);
-}
-
-
-static struct wpabuf * eap_tnc_build_start(struct eap_sm *sm,
-					   struct eap_tnc_data *data, u8 id)
-{
-	struct wpabuf *req;
-
-	req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TNC, 1, EAP_CODE_REQUEST,
-			    id);
-	if (req == NULL) {
-		wpa_printf(MSG_ERROR, "EAP-TNC: Failed to allocate memory for "
-			   "request");
-		eap_tnc_set_state(data, FAIL);
-		return NULL;
-	}
-
-	wpabuf_put_u8(req, EAP_TNC_FLAGS_START | EAP_TNC_VERSION);
-
-	eap_tnc_set_state(data, CONTINUE);
-
-	return req;
-}
-
-
-static struct wpabuf * eap_tnc_build(struct eap_sm *sm,
-				     struct eap_tnc_data *data)
-{
-	struct wpabuf *req;
-	u8 *rpos, *rpos1;
-	size_t rlen;
-	char *start_buf, *end_buf;
-	size_t start_len, end_len;
-	size_t imv_len;
-
-	imv_len = tncs_total_send_len(data->tncs);
-
-	start_buf = tncs_if_tnccs_start(data->tncs);
-	if (start_buf == NULL)
-		return NULL;
-	start_len = os_strlen(start_buf);
-	end_buf = tncs_if_tnccs_end();
-	if (end_buf == NULL) {
-		os_free(start_buf);
-		return NULL;
-	}
-	end_len = os_strlen(end_buf);
-
-	rlen = start_len + imv_len + end_len;
-	req = wpabuf_alloc(rlen);
-	if (req == NULL) {
-		os_free(start_buf);
-		os_free(end_buf);
-		return NULL;
-	}
-
-	wpabuf_put_data(req, start_buf, start_len);
-	os_free(start_buf);
-
-	rpos1 = wpabuf_put(req, 0);
-	rpos = tncs_copy_send_buf(data->tncs, rpos1);
-	wpabuf_put(req, rpos - rpos1);
-
-	wpabuf_put_data(req, end_buf, end_len);
-	os_free(end_buf);
-
-	wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-TNC: Request",
-			  wpabuf_head(req), wpabuf_len(req));
-
-	return req;
-}
-
-
-static struct wpabuf * eap_tnc_build_recommendation(struct eap_sm *sm,
-						    struct eap_tnc_data *data)
-{
-	switch (data->recommendation) {
-	case ALLOW:
-		eap_tnc_set_state(data, DONE);
-		break;
-	case ISOLATE:
-		eap_tnc_set_state(data, FAIL);
-		/* TODO: support assignment to a different VLAN */
-		break;
-	case NO_ACCESS:
-		eap_tnc_set_state(data, FAIL);
-		break;
-	case NO_RECOMMENDATION:
-		eap_tnc_set_state(data, DONE);
-		break;
-	default:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Unknown recommendation");
-		return NULL;
-	}
-
-	return eap_tnc_build(sm, data);
-}
-
-
-static struct wpabuf * eap_tnc_build_frag_ack(u8 id, u8 code)
-{
-	struct wpabuf *msg;
-
-	msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TNC, 1, code, id);
-	if (msg == NULL) {
-		wpa_printf(MSG_ERROR, "EAP-TNC: Failed to allocate memory "
-			   "for fragment ack");
-		return NULL;
-	}
-	wpabuf_put_u8(msg, EAP_TNC_VERSION); /* Flags */
-
-	wpa_printf(MSG_DEBUG, "EAP-TNC: Send fragment ack");
-
-	return msg;
-}
-
-
-static struct wpabuf * eap_tnc_build_msg(struct eap_tnc_data *data, u8 id)
-{
-	struct wpabuf *req;
-	u8 flags;
-	size_t send_len, plen;
-
-	wpa_printf(MSG_DEBUG, "EAP-TNC: Generating Request");
-
-	flags = EAP_TNC_VERSION;
-	send_len = wpabuf_len(data->out_buf) - data->out_used;
-	if (1 + send_len > data->fragment_size) {
-		send_len = data->fragment_size - 1;
-		flags |= EAP_TNC_FLAGS_MORE_FRAGMENTS;
-		if (data->out_used == 0) {
-			flags |= EAP_TNC_FLAGS_LENGTH_INCLUDED;
-			send_len -= 4;
-		}
-	}
-
-	plen = 1 + send_len;
-	if (flags & EAP_TNC_FLAGS_LENGTH_INCLUDED)
-		plen += 4;
-	req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TNC, plen,
-			    EAP_CODE_REQUEST, id);
-	if (req == NULL)
-		return NULL;
-
-	wpabuf_put_u8(req, flags); /* Flags */
-	if (flags & EAP_TNC_FLAGS_LENGTH_INCLUDED)
-		wpabuf_put_be32(req, wpabuf_len(data->out_buf));
-
-	wpabuf_put_data(req, wpabuf_head_u8(data->out_buf) + data->out_used,
-			send_len);
-	data->out_used += send_len;
-
-	if (data->out_used == wpabuf_len(data->out_buf)) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Sending out %lu bytes "
-			   "(message sent completely)",
-			   (unsigned long) send_len);
-		wpabuf_free(data->out_buf);
-		data->out_buf = NULL;
-		data->out_used = 0;
-		if (data->was_fail)
-			eap_tnc_set_state(data, FAIL);
-		else if (data->was_done)
-			eap_tnc_set_state(data, DONE);
-	} else {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Sending out %lu bytes "
-			   "(%lu more to send)", (unsigned long) send_len,
-			   (unsigned long) wpabuf_len(data->out_buf) -
-			   data->out_used);
-		if (data->state == FAIL)
-			data->was_fail = 1;
-		else if (data->state == DONE)
-			data->was_done = 1;
-		eap_tnc_set_state(data, WAIT_FRAG_ACK);
-	}
-
-	return req;
-}
-
-
-static struct wpabuf * eap_tnc_buildReq(struct eap_sm *sm, void *priv, u8 id)
-{
-	struct eap_tnc_data *data = priv;
-
-	switch (data->state) {
-	case START:
-		tncs_init_connection(data->tncs);
-		return eap_tnc_build_start(sm, data, id);
-	case CONTINUE:
-		if (data->out_buf == NULL) {
-			data->out_buf = eap_tnc_build(sm, data);
-			if (data->out_buf == NULL) {
-				wpa_printf(MSG_DEBUG, "EAP-TNC: Failed to "
-					   "generate message");
-				return NULL;
-			}
-			data->out_used = 0;
-		}
-		return eap_tnc_build_msg(data, id);
-	case RECOMMENDATION:
-		if (data->out_buf == NULL) {
-			data->out_buf = eap_tnc_build_recommendation(sm, data);
-			if (data->out_buf == NULL) {
-				wpa_printf(MSG_DEBUG, "EAP-TNC: Failed to "
-					   "generate recommendation message");
-				return NULL;
-			}
-			data->out_used = 0;
-		}
-		return eap_tnc_build_msg(data, id);
-	case WAIT_FRAG_ACK:
-		return eap_tnc_build_msg(data, id);
-	case FRAG_ACK:
-		return eap_tnc_build_frag_ack(id, EAP_CODE_REQUEST);
-	case DONE:
-	case FAIL:
-		return NULL;
-	}
-
-	return NULL;
-}
-
-
-static Boolean eap_tnc_check(struct eap_sm *sm, void *priv,
-			     struct wpabuf *respData)
-{
-	struct eap_tnc_data *data = priv;
-	const u8 *pos;
-	size_t len;
-
-	pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TNC, respData,
-			       &len);
-	if (pos == NULL) {
-		wpa_printf(MSG_INFO, "EAP-TNC: Invalid frame");
-		return TRUE;
-	}
-
-	if (len == 0 && data->state != WAIT_FRAG_ACK) {
-		wpa_printf(MSG_INFO, "EAP-TNC: Invalid frame (empty)");
-		return TRUE;
-	}
-
-	if (len == 0)
-		return FALSE; /* Fragment ACK does not include flags */
-
-	if ((*pos & EAP_TNC_VERSION_MASK) != EAP_TNC_VERSION) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Unsupported version %d",
-			   *pos & EAP_TNC_VERSION_MASK);
-		return TRUE;
-	}
-
-	if (*pos & EAP_TNC_FLAGS_START) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Peer used Start flag");
-		return TRUE;
-	}
-
-	return FALSE;
-}
-
-
-static void tncs_process(struct eap_tnc_data *data, struct wpabuf *inbuf)
-{
-	enum tncs_process_res res;
-
-	res = tncs_process_if_tnccs(data->tncs, wpabuf_head(inbuf),
-				    wpabuf_len(inbuf));
-	switch (res) {
-	case TNCCS_RECOMMENDATION_ALLOW:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: TNCS allowed access");
-		eap_tnc_set_state(data, RECOMMENDATION);
-		data->recommendation = ALLOW;
-		break;
-	case TNCCS_RECOMMENDATION_NO_RECOMMENDATION:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: TNCS has no recommendation");
-		eap_tnc_set_state(data, RECOMMENDATION);
-		data->recommendation = NO_RECOMMENDATION;
-		break;
-	case TNCCS_RECOMMENDATION_ISOLATE:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: TNCS requested isolation");
-		eap_tnc_set_state(data, RECOMMENDATION);
-		data->recommendation = ISOLATE;
-		break;
-	case TNCCS_RECOMMENDATION_NO_ACCESS:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: TNCS rejected access");
-		eap_tnc_set_state(data, RECOMMENDATION);
-		data->recommendation = NO_ACCESS;
-		break;
-	case TNCCS_PROCESS_ERROR:
-		wpa_printf(MSG_DEBUG, "EAP-TNC: TNCS processing error");
-		eap_tnc_set_state(data, FAIL);
-		break;
-	default:
-		break;
-	}
-}
-
-
-static int eap_tnc_process_cont(struct eap_tnc_data *data,
-				const u8 *buf, size_t len)
-{
-	/* Process continuation of a pending message */
-	if (len > wpabuf_tailroom(data->in_buf)) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Fragment overflow");
-		eap_tnc_set_state(data, FAIL);
-		return -1;
-	}
-
-	wpabuf_put_data(data->in_buf, buf, len);
-	wpa_printf(MSG_DEBUG, "EAP-TNC: Received %lu bytes, waiting for %lu "
-		   "bytes more", (unsigned long) len,
-		   (unsigned long) wpabuf_tailroom(data->in_buf));
-
-	return 0;
-}
-
-
-static int eap_tnc_process_fragment(struct eap_tnc_data *data,
-				    u8 flags, u32 message_length,
-				    const u8 *buf, size_t len)
-{
-	/* Process a fragment that is not the last one of the message */
-	if (data->in_buf == NULL && !(flags & EAP_TNC_FLAGS_LENGTH_INCLUDED)) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: No Message Length field in a "
-			   "fragmented packet");
-		return -1;
-	}
-
-	if (data->in_buf == NULL) {
-		/* First fragment of the message */
-		data->in_buf = wpabuf_alloc(message_length);
-		if (data->in_buf == NULL) {
-			wpa_printf(MSG_DEBUG, "EAP-TNC: No memory for "
-				   "message");
-			return -1;
-		}
-		wpabuf_put_data(data->in_buf, buf, len);
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Received %lu bytes in first "
-			   "fragment, waiting for %lu bytes more",
-			   (unsigned long) len,
-			   (unsigned long) wpabuf_tailroom(data->in_buf));
-	}
-
-	return 0;
-}
-
-
-static void eap_tnc_process(struct eap_sm *sm, void *priv,
-			    struct wpabuf *respData)
-{
-	struct eap_tnc_data *data = priv;
-	const u8 *pos, *end;
-	size_t len;
-	u8 flags;
-	u32 message_length = 0;
-	struct wpabuf tmpbuf;
-
-	pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TNC, respData, &len);
-	if (pos == NULL)
-		return; /* Should not happen; message already verified */
-
-	end = pos + len;
-
-	if (len == 1 && (data->state == DONE || data->state == FAIL)) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Peer acknowledged the last "
-			   "message");
-		return;
-	}
-
-	if (len == 0) {
-		/* fragment ack */
-		flags = 0;
-	} else
-		flags = *pos++;
-
-	if (flags & EAP_TNC_FLAGS_LENGTH_INCLUDED) {
-		if (end - pos < 4) {
-			wpa_printf(MSG_DEBUG, "EAP-TNC: Message underflow");
-			eap_tnc_set_state(data, FAIL);
-			return;
-		}
-		message_length = WPA_GET_BE32(pos);
-		pos += 4;
-
-		if (message_length < (u32) (end - pos)) {
-			wpa_printf(MSG_DEBUG, "EAP-TNC: Invalid Message "
-				   "Length (%d; %ld remaining in this msg)",
-				   message_length, (long) (end - pos));
-			eap_tnc_set_state(data, FAIL);
-			return;
-		}
-	}
-	wpa_printf(MSG_DEBUG, "EAP-TNC: Received packet: Flags 0x%x "
-		   "Message Length %u", flags, message_length);
-
-	if (data->state == WAIT_FRAG_ACK) {
-		if (len > 1) {
-			wpa_printf(MSG_DEBUG, "EAP-TNC: Unexpected payload "
-				   "in WAIT_FRAG_ACK state");
-			eap_tnc_set_state(data, FAIL);
-			return;
-		}
-		wpa_printf(MSG_DEBUG, "EAP-TNC: Fragment acknowledged");
-		eap_tnc_set_state(data, CONTINUE);
-		return;
-	}
-
-	if (data->in_buf && eap_tnc_process_cont(data, pos, end - pos) < 0) {
-		eap_tnc_set_state(data, FAIL);
-		return;
-	}
-		
-	if (flags & EAP_TNC_FLAGS_MORE_FRAGMENTS) {
-		if (eap_tnc_process_fragment(data, flags, message_length,
-					     pos, end - pos) < 0)
-			eap_tnc_set_state(data, FAIL);
-		else
-			eap_tnc_set_state(data, FRAG_ACK);
-		return;
-	} else if (data->state == FRAG_ACK) {
-		wpa_printf(MSG_DEBUG, "EAP-TNC: All fragments received");
-		eap_tnc_set_state(data, CONTINUE);
-	}
-
-	if (data->in_buf == NULL) {
-		/* Wrap unfragmented messages as wpabuf without extra copy */
-		wpabuf_set(&tmpbuf, pos, end - pos);
-		data->in_buf = &tmpbuf;
-	}
-
-	wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-TNC: Received payload",
-			  wpabuf_head(data->in_buf), wpabuf_len(data->in_buf));
-	tncs_process(data, data->in_buf);
-
-	if (data->in_buf != &tmpbuf)
-		wpabuf_free(data->in_buf);
-	data->in_buf = NULL;
-}
-
-
-static Boolean eap_tnc_isDone(struct eap_sm *sm, void *priv)
-{
-	struct eap_tnc_data *data = priv;
-	return data->state == DONE || data->state == FAIL;
-}
-
-
-static Boolean eap_tnc_isSuccess(struct eap_sm *sm, void *priv)
-{
-	struct eap_tnc_data *data = priv;
-	return data->state == DONE;
-}
-
-
-int eap_server_tnc_register(void)
-{
-	struct eap_method *eap;
-	int ret;
-
-	eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
-				      EAP_VENDOR_IETF, EAP_TYPE_TNC, "TNC");
-	if (eap == NULL)
-		return -1;
-
-	eap->init = eap_tnc_init;
-	eap->reset = eap_tnc_reset;
-	eap->buildReq = eap_tnc_buildReq;
-	eap->check = eap_tnc_check;
-	eap->process = eap_tnc_process;
-	eap->isDone = eap_tnc_isDone;
-	eap->isSuccess = eap_tnc_isSuccess;
-
-	ret = eap_server_method_register(eap);
-	if (ret)
-		eap_server_method_free(eap);
-	return ret;
-}