mirror of
https://github.com/mfontanini/libtins
synced 2026-01-23 02:35:57 +01:00
121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
/*
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* libtins is a net packet wrapper library for crafting and
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* interpreting sniffed packets.
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*
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* Copyright (C) 2011 Nasel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* 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
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdexcept>
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#include "rsn_information.h"
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namespace Tins {
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RSNInformation::RSNInformation() : _version(1), _capabilities(0) {
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}
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RSNInformation::RSNInformation(const uint8_t *buffer, uint32_t total_sz) {
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const char *err_msg = "Malformed RSN information structure";
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version(Endian::le_to_host(*(uint16_t*)buffer));
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buffer += sizeof(uint16_t);
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group_suite((RSNInformation::CypherSuites)*(uint32_t*)buffer);
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buffer += sizeof(uint32_t);
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total_sz -= (sizeof(uint16_t) << 1) + sizeof(uint32_t);
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if(total_sz < sizeof(uint16_t))
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throw std::runtime_error(err_msg);
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uint16_t count = *(uint16_t*)buffer;
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buffer += sizeof(uint16_t);
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if(count * sizeof(uint32_t) > total_sz)
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throw std::runtime_error(err_msg);
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total_sz -= count * sizeof(uint32_t);
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while(count--) {
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add_pairwise_cypher((RSNInformation::CypherSuites)*(uint32_t*)buffer);
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buffer += sizeof(uint32_t);
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}
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if(total_sz < sizeof(uint16_t))
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throw std::runtime_error(err_msg);
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count = *(uint16_t*)buffer;
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buffer += sizeof(uint16_t);
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total_sz -= sizeof(uint16_t);
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if(count * sizeof(uint32_t) > total_sz)
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throw std::runtime_error(err_msg);
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total_sz -= count * sizeof(uint32_t);
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while(count--) {
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add_akm_cypher((RSNInformation::AKMSuites)*(uint32_t*)buffer);
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buffer += sizeof(uint32_t);
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}
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if(total_sz < sizeof(uint16_t))
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throw std::runtime_error(err_msg);
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capabilities(Endian::le_to_host(*(uint16_t*)buffer));
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}
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void RSNInformation::add_pairwise_cypher(CypherSuites cypher) {
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_pairwise_cyphers.push_back(cypher);
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}
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void RSNInformation::add_akm_cypher(AKMSuites akm) {
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_akm_cyphers.push_back(akm);
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}
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void RSNInformation::group_suite(CypherSuites group) {
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_group_suite = group;
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}
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void RSNInformation::version(uint16_t ver) {
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_version = Endian::host_to_le(ver);
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}
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void RSNInformation::capabilities(uint16_t cap) {
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_capabilities = Endian::host_to_le(cap);
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}
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RSNInformation::serialization_type RSNInformation::serialize() const {
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uint32_t size = sizeof(_version) + sizeof(_capabilities) + sizeof(uint32_t);
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size += (sizeof(uint16_t) << 1); // 2 lists count.
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size += sizeof(uint32_t) * (_akm_cyphers.size() + _pairwise_cyphers.size());
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serialization_type buffer(size);
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serialization_type::value_type *ptr = &buffer[0];
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*(uint16_t*)ptr = _version;
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ptr += sizeof(_version);
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*(uint32_t*)ptr = _group_suite;
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ptr += sizeof(uint32_t);
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*(uint16_t*)ptr = _pairwise_cyphers.size();
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ptr += sizeof(uint16_t);
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for(cyphers_type::const_iterator it = _pairwise_cyphers.begin(); it != _pairwise_cyphers.end(); ++it) {
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*(uint32_t*)ptr = *it;
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ptr += sizeof(uint32_t);
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}
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*(uint16_t*)ptr = _akm_cyphers.size();
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ptr += sizeof(uint16_t);
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for(akm_type::const_iterator it = _akm_cyphers.begin(); it != _akm_cyphers.end(); ++it) {
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*(uint32_t*)ptr = *it;
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ptr += sizeof(uint32_t);
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}
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*(uint16_t*)ptr = _capabilities;
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return buffer;
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}
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RSNInformation RSNInformation::wpa2_psk() {
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RSNInformation info;
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info.group_suite(RSNInformation::CCMP);
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info.add_pairwise_cypher(RSNInformation::CCMP);
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info.add_akm_cypher(RSNInformation::PSK);
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return info;
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}
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}
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