150 lines
3.9 KiB
C++
150 lines
3.9 KiB
C++
/*
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*
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* Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
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* All rights reserved.
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*
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* This file is part of libprotoident.
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*
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* This code has been developed by the University of Waikato WAND
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* research group. For further information please see http://www.wand.net.nz/
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*
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* libprotoident is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* libprotoident 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#include <string.h>
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#include "libprotoident.h"
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#include "proto_manager.h"
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#include "proto_common.h"
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static inline bool match_wa_first(uint32_t payload, uint32_t len) {
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if (MATCH(payload, 'W', 'A', 0x01, 0x02))
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return true;
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if (MATCH(payload, 'W', 'A', 0x01, 0x05))
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return true;
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if (len == 1 && MATCH(payload, 'W', 0x00, 0x00, 0x00))
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return true;
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return false;
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}
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static inline bool match_wa_first_20(uint32_t payload, uint32_t len) {
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/* New protocol version? 2.0? */
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if (MATCH(payload, 'W', 'A', 0x02, 0x00))
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return true;
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if (len == 1 && MATCH(payload, 'W', 0x00, 0x00, 0x00))
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return true;
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return false;
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}
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static inline bool match_ed_first(uint32_t payload, uint32_t len) {
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if (MATCH(payload, 'E', 'D', 0x00, 0x01))
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return true;
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if (len == 1 && MATCH(payload, 'E', 0x00, 0x00, 0x00))
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return true;
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return false;
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}
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static inline bool match_wa_second(uint32_t payload, uint32_t len) {
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if (len == 0)
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return true;
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if (MATCH(payload, 0x00, 0x00, 0x05, 0xf8))
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return true;
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return false;
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}
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static inline bool match_wa_second_20(uint32_t payload, uint32_t len) {
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uint32_t walen = ntohl(payload) >> 8;
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if (len == 0)
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return true;
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if (walen == len - 3) {
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if (MATCH(payload, ANY, ANY, ANY, 0x1a))
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return true;
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}
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return false;
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}
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static inline bool match_wa_fixed_second(uint32_t payload) {
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if (MATCH(payload, 0x00, 0x00, 0x36, 0x1a)) {
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return true;
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}
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return false;
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}
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static inline bool match_whatsapp(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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/* WhatsApp uses a modified form of XMPP and typically runs on
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* either port 443 or 5222
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*/
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if (match_wa_first(data->payload[0], data->payload_len[0])) {
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if (match_wa_second(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_wa_first(data->payload[1], data->payload_len[1])) {
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if (match_wa_second(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_wa_first_20(data->payload[0], data->payload_len[0])) {
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if (match_wa_second_20(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_wa_first_20(data->payload[1], data->payload_len[1])) {
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if (match_wa_second_20(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_ed_first(data->payload[0], data->payload_len[0])) {
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if (match_wa_second_20(data->payload[1], data->payload_len[1]))
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return true;
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if (match_wa_fixed_second(data->payload[1]))
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return true;
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}
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if (match_ed_first(data->payload[1], data->payload_len[1])) {
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if (match_wa_second_20(data->payload[0], data->payload_len[0]))
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return true;
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if (match_wa_fixed_second(data->payload[0]))
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return true;
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}
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return false;
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}
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static lpi_module_t lpi_whatsapp = {
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LPI_PROTO_WHATSAPP,
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LPI_CATEGORY_CHAT,
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"WhatsApp",
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4,
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match_whatsapp
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};
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void register_whatsapp(LPIModuleMap *mod_map) {
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register_protocol(&lpi_whatsapp, mod_map);
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}
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