268 lines
7.0 KiB
C++
268 lines
7.0 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef TINS_IPSEC_H
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#define TINS_IPSEC_H
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#include <tins/pdu.h>
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#include <tins/macros.h>
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#include <tins/endianness.h>
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#include <tins/small_uint.h>
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namespace Tins {
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/**
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* \class IPSecAH
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* \brief Represents an IPSec Authentication Header.
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*/
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class TINS_API IPSecAH : public PDU {
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public:
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/**
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* This PDU's flag.
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*/
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static const PDU::PDUType pdu_flag = PDU::IPSEC_AH;
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/**
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* \brief Default constructor.
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*
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* The ICV field is initialized with four 0 bytes. The length
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* field is initialized appropriately.
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*/
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IPSecAH();
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/**
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* \brief Constructs an IPSecAH object from a buffer and adds all
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* identifiable PDUs found in the buffer as children of this
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* one.
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*
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* If there is not enough size for an IPSecAH header, a
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* malformed_packet exception is thrown.
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*
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* \param buffer The buffer from which this PDU will be constructed.
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* \param total_sz The total size of the buffer.
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*/
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IPSecAH(const uint8_t* buffer, uint32_t total_sz);
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// Getters
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/**
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* \brief Getter for the Next header field.
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* \return The stored Next header field value.
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*/
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uint8_t next_header() const {
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return header_.next_header;
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}
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/**
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* \brief Getter for the Length field.
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* \return The stored Length field value.
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*/
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uint8_t length() const {
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return header_.length;
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}
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/**
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* \brief Getter for the Security Parameters Index field.
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* \return The stored Security Parameters Index field value.
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*/
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uint32_t spi() const {
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return Endian::be_to_host(header_.spi);
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}
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/**
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* \brief Getter for the Sequence number field.
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* \return The stored Sequence number field value.
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*/
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uint32_t seq_number() const {
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return Endian::be_to_host(header_.seq_number);
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}
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/**
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* \brief Getter for the ICV field.
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* \return The stored ICV field value.
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*/
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const byte_array& icv() const {
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return icv_;
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}
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// Setters
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/**
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* \brief Setter for the Next header field.
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* \param new_next_header The new Next header field value.
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*/
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void next_header(uint8_t new_next_header);
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/**
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* \brief Setter for the Length field.
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* \param new_length The new Length field value.
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*/
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void length(uint8_t new_length);
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/**
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* \brief Setter for the Security Parameters Index field.
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* \param new_spi The new Security Parameters Index field value.
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*/
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void spi(uint32_t new_spi);
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/**
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* \brief Setter for the Sequence number field.
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* \param new_seq_number The new Sequence number field value.
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*/
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void seq_number(uint32_t new_seq_number);
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/**
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* \brief Setter for the ICV field.
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* \param newicv_ The new ICV field value.
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*/
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void icv(const byte_array& newicv_);
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/**
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* \brief Returns the header size.
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*
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* This method overrides PDU::header_size. \sa PDU::header_size
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*/
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uint32_t header_size() const;
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/**
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* \brief Getter for the PDU's type.
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* \sa PDU::pdu_type
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*/
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PDUType pdu_type() const { return pdu_flag; }
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/**
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* \sa PDU::clone
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*/
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IPSecAH* clone() const {
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return new IPSecAH(*this);
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}
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private:
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struct ipsec_header {
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uint8_t next_header, length;
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uint32_t spi, seq_number;
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};
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void write_serialization(uint8_t* buffer, uint32_t total_sz);
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ipsec_header header_;
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byte_array icv_;
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};
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/**
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* \brief Represents an IPSec Authentication Header.
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*/
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class TINS_API IPSecESP : public PDU {
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public:
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/**
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* This PDU's flag.
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*/
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static const PDU::PDUType pdu_flag = PDU::IPSEC_ESP;
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/**
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* \brief Default constructor.
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*/
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IPSecESP();
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/**
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* \brief Constructs an IPSecESP object from a buffer and adds all
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* identifiable PDUs found in the buffer as children of this
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* one.
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*
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* If there is not enough size for an IPSecESP header, a
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* malformed_packet exception is thrown.
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*
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* \param buffer The buffer from which this PDU will be constructed.
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* \param total_sz The total size of the buffer.
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*/
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IPSecESP(const uint8_t* buffer, uint32_t total_sz);
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// Getters
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/**
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* \brief Getter for the Security Parameters Index field.
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* \return The stored Security Parameters Index field value.
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*/
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uint32_t spi() const {
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return Endian::be_to_host(header_.spi);
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}
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/**
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* \brief Getter for the Sequence number field.
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* \return The stored Sequence number field value.
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*/
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uint32_t seq_number() const {
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return Endian::be_to_host(header_.seq_number);
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}
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// Setters
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/**
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* \brief Setter for the Security Parameters Index field.
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* \param new_spi The new Security Parameters Index field value.
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*/
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void spi(uint32_t new_spi);
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/**
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* \brief Setter for the Sequence number field.
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* \param new_seq_number The new Sequence number field value.
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*/
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void seq_number(uint32_t new_seq_number);
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/**
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* \brief Returns the header size.
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*
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* This method overrides PDU::header_size. \sa PDU::header_size
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*/
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uint32_t header_size() const;
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/**
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* \brief Getter for the PDU's type.
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* \sa PDU::pdu_type
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*/
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PDUType pdu_type() const { return pdu_flag; }
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/**
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* \sa PDU::clone
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*/
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IPSecESP* clone() const {
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return new IPSecESP(*this);
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}
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private:
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struct ipsec_header {
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uint32_t spi, seq_number;
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};
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void write_serialization(uint8_t* buffer, uint32_t total_sz);
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ipsec_header header_;
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};
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}
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#endif // TINS_IPSEC_H
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