mirror of
https://github.com/mfontanini/libtins
synced 2026-01-23 10:45:57 +01:00
136 lines
3.9 KiB
C++
136 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 2012, 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 <cstring>
|
|
#include "ipsec.h"
|
|
#include "internals.h"
|
|
#include "rawpdu.h"
|
|
|
|
namespace Tins {
|
|
|
|
IPSecAH::IPSecAH()
|
|
: _header(), _icv(4) {
|
|
length(2);
|
|
}
|
|
|
|
IPSecAH::IPSecAH(const uint8_t *buffer, uint32_t total_sz) {
|
|
// At least size for the header + 32bits of ICV
|
|
if(total_sz < sizeof(_header) + sizeof(uint32_t))
|
|
throw malformed_packet();
|
|
std::memcpy(&_header, buffer, sizeof(_header));
|
|
const uint32_t ah_len = 4 * (static_cast<uint16_t>(length()) + 2);
|
|
if(ah_len > total_sz)
|
|
throw malformed_packet();
|
|
_icv.assign(buffer + sizeof(_header), buffer + ah_len);
|
|
buffer += ah_len;
|
|
total_sz -= ah_len;
|
|
if(total_sz) {
|
|
inner_pdu(
|
|
Internals::pdu_from_flag(
|
|
static_cast<Constants::IP::e>(next_header()),
|
|
buffer,
|
|
total_sz,
|
|
true
|
|
)
|
|
);
|
|
}
|
|
}
|
|
|
|
void IPSecAH::next_header(uint8_t new_next_header) {
|
|
_header.next_header = new_next_header;
|
|
}
|
|
|
|
void IPSecAH::length(uint8_t new_length) {
|
|
_header.length = new_length;
|
|
}
|
|
|
|
void IPSecAH::spi(uint32_t new_spi) {
|
|
_header.spi = Endian::host_to_be(new_spi);
|
|
}
|
|
|
|
void IPSecAH::seq_number(uint32_t new_seq_number) {
|
|
_header.seq_number = Endian::host_to_be(new_seq_number);
|
|
}
|
|
|
|
void IPSecAH::icv(const byte_array &new_icv) {
|
|
_icv = new_icv;
|
|
}
|
|
|
|
uint32_t IPSecAH::header_size() const {
|
|
return sizeof(_header) + _icv.size();
|
|
}
|
|
|
|
void IPSecAH::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *) {
|
|
if(inner_pdu())
|
|
next_header(Internals::pdu_flag_to_ip_type(inner_pdu()->pdu_type()));
|
|
std::memcpy(buffer, &_header, sizeof(_header));
|
|
std::copy(
|
|
_icv.begin(),
|
|
_icv.end(),
|
|
buffer + sizeof(_header)
|
|
);
|
|
}
|
|
|
|
// IPSecESP
|
|
|
|
IPSecESP::IPSecESP()
|
|
: _header()
|
|
{
|
|
|
|
}
|
|
|
|
IPSecESP::IPSecESP(const uint8_t *buffer, uint32_t total_sz) {
|
|
if(total_sz < sizeof(_header))
|
|
throw malformed_packet();
|
|
std::memcpy(&_header, buffer, sizeof(_header));
|
|
buffer += sizeof(_header);
|
|
total_sz -= sizeof(_header);
|
|
if(total_sz) {
|
|
inner_pdu(new RawPDU(buffer, total_sz));
|
|
}
|
|
}
|
|
|
|
void IPSecESP::spi(uint32_t new_spi) {
|
|
_header.spi = Endian::host_to_be(new_spi);
|
|
}
|
|
|
|
void IPSecESP::seq_number(uint32_t new_seq_number) {
|
|
_header.seq_number = Endian::host_to_be(new_seq_number);
|
|
}
|
|
|
|
uint32_t IPSecESP::header_size() const {
|
|
return sizeof(_header);
|
|
}
|
|
|
|
void IPSecESP::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *) {
|
|
std::memcpy(buffer, &_header, sizeof(_header));
|
|
}
|
|
|
|
}
|