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/*
* Copyright (c) 2017, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <tins/rsn_information.h>
#ifdef TINS_HAVE_DOT11
#include <cstring>
#include <tins/exceptions.h>
#include <tins/pdu.h>
#include <tins/pdu_option.h>
#include <tins/memory_helpers.h>
#include <tins/dot11/dot11_base.h>
using Tins::Memory::InputMemoryStream;
using Tins::Memory::OutputMemoryStream;
namespace Tins {
RSNInformation::RSNInformation()
: version_(1), capabilities_(0), group_suite_(static_cast<CypherSuites>(0)) {
}
RSNInformation::RSNInformation(const serialization_type& buffer) {
init(&buffer[0], static_cast<uint32_t>(buffer.size()));
}
RSNInformation::RSNInformation(const uint8_t* buffer, uint32_t total_sz) {
init(buffer, total_sz);
}
void RSNInformation::init(const uint8_t* buffer, uint32_t total_sz) {
InputMemoryStream stream(buffer, total_sz);
version(stream.read_le<uint16_t>());
group_suite((RSNInformation::CypherSuites)stream.read_le<uint32_t>());
int pairwise_cyphers_size = stream.read_le<uint16_t>();
if (!stream.can_read(pairwise_cyphers_size)) {
throw malformed_packet();
}
while (pairwise_cyphers_size--) {
add_pairwise_cypher((RSNInformation::CypherSuites)stream.read_le<uint32_t>());
}
int akm_cyphers_size = stream.read_le<uint16_t>();
if (!stream.can_read(akm_cyphers_size)) {
throw malformed_packet();
}
while (akm_cyphers_size--) {
add_akm_cypher((RSNInformation::AKMSuites)stream.read_le<uint32_t>());
}
capabilities(stream.read_le<uint16_t>());
}
void RSNInformation::add_pairwise_cypher(CypherSuites cypher) {
pairwise_cyphers_.push_back(cypher);
}
void RSNInformation::add_akm_cypher(AKMSuites akm) {
akm_cyphers_.push_back(akm);
}
void RSNInformation::group_suite(CypherSuites group) {
group_suite_ = static_cast<CypherSuites>(Endian::host_to_le<uint32_t>(group));
}
void RSNInformation::version(uint16_t ver) {
version_ = Endian::host_to_le(ver);
}
void RSNInformation::capabilities(uint16_t cap) {
capabilities_ = Endian::host_to_le(cap);
}
RSNInformation::serialization_type RSNInformation::serialize() const {
size_t size = sizeof(version_) + sizeof(capabilities_) + sizeof(uint32_t);
size += (sizeof(uint16_t) << 1); // 2 lists count.
size += sizeof(uint32_t) * (akm_cyphers_.size() + pairwise_cyphers_.size());
const uint16_t pairwise_cyphers_size = Endian::host_to_le<uint16_t>(pairwise_cyphers_.size());
const uint16_t akm_cyphers_size = Endian::host_to_le<uint16_t>(akm_cyphers_.size());
serialization_type buffer(size);
OutputMemoryStream stream(&buffer[0], buffer.size());
stream.write(version_);
stream.write(group_suite_);
stream.write(pairwise_cyphers_size);
for (cyphers_type::const_iterator it = pairwise_cyphers_.begin(); it != pairwise_cyphers_.end(); ++it) {
stream.write(Endian::host_to_le<uint32_t>(*it));
}
stream.write(akm_cyphers_size);
for (akm_type::const_iterator it = akm_cyphers_.begin(); it != akm_cyphers_.end(); ++it) {
stream.write(Endian::host_to_le<uint32_t>(*it));
}
stream.write(capabilities_);
return buffer;
}
RSNInformation RSNInformation::wpa2_psk() {
RSNInformation info;
info.group_suite(RSNInformation::CCMP);
info.add_pairwise_cypher(RSNInformation::CCMP);
info.add_akm_cypher(RSNInformation::PSK);
return info;
}
RSNInformation RSNInformation::from_option(const PDUOption<uint8_t, Dot11>& opt) {
if (opt.data_size() < sizeof(uint16_t) * 2 + sizeof(uint32_t)) {
throw malformed_option();
}
return RSNInformation(opt.data_ptr(), static_cast<uint32_t>(opt.data_size()));
}
} // Tins
#endif // TINS_HAVE_DOT11
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