178 lines
4.1 KiB
C
178 lines
4.1 KiB
C
/*
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* Copyright (C) 2011 Martin Willi
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* Copyright (C) 2011 revosec AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <stddef.h>
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#include "hash_payload.h"
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#include <encoding/payloads/encodings.h>
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typedef struct private_hash_payload_t private_hash_payload_t;
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/**
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* Private data of an hash_payload_t object.
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*/
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struct private_hash_payload_t {
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/**
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* Public hash_payload_t interface.
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*/
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hash_payload_t public;
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/**
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* Next payload type.
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*/
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uint8_t next_payload;
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/**
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* Reserved byte
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*/
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uint8_t reserved;
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/**
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* Length of this payload.
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*/
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uint16_t payload_length;
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/**
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* The contained hash value.
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*/
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chunk_t hash;
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/**
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* either PLV1_HASH or PLV1_NAT_D
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*/
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payload_type_t type;
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};
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/**
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* Encoding rules for an IKEv1 hash payload
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*/
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static encoding_rule_t encodings[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_hash_payload_t, next_payload) },
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{ RESERVED_BYTE, offsetof(private_hash_payload_t, reserved) },
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/* Length of the whole payload*/
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{ PAYLOAD_LENGTH, offsetof(private_hash_payload_t, payload_length) },
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/* Hash Data is from variable size */
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{ CHUNK_DATA, offsetof(private_hash_payload_t, hash) },
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};
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/*
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1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Next Payload ! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Hash Data ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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METHOD(payload_t, verify, status_t,
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private_hash_payload_t *this)
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{
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return SUCCESS;
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}
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METHOD(payload_t, get_encoding_rules, int,
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private_hash_payload_t *this, encoding_rule_t **rules)
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{
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*rules = encodings;
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return countof(encodings);
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}
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METHOD(payload_t, get_header_length, int,
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private_hash_payload_t *this)
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{
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return 4;
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}
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METHOD(payload_t, get_type, payload_type_t,
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private_hash_payload_t *this)
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{
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return this->type;
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}
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METHOD(payload_t, get_next_type, payload_type_t,
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private_hash_payload_t *this)
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{
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return this->next_payload;
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}
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METHOD(payload_t, set_next_type, void,
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private_hash_payload_t *this, payload_type_t type)
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{
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this->next_payload = type;
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}
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METHOD(payload_t, get_length, size_t,
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private_hash_payload_t *this)
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{
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return this->payload_length;
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}
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METHOD(hash_payload_t, set_hash, void,
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private_hash_payload_t *this, chunk_t hash)
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{
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free(this->hash.ptr);
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this->hash = chunk_clone(hash);
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this->payload_length = get_header_length(this) + hash.len;
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}
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METHOD(hash_payload_t, get_hash, chunk_t,
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private_hash_payload_t *this)
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{
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return this->hash;
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}
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METHOD2(payload_t, hash_payload_t, destroy, void,
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private_hash_payload_t *this)
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{
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free(this->hash.ptr);
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free(this);
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}
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/*
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* Described in header
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*/
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hash_payload_t *hash_payload_create(payload_type_t type)
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{
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private_hash_payload_t *this;
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INIT(this,
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.public = {
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.payload_interface = {
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.verify = _verify,
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.get_encoding_rules = _get_encoding_rules,
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.get_header_length = _get_header_length,
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.get_length = _get_length,
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.get_next_type = _get_next_type,
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.set_next_type = _set_next_type,
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.get_type = _get_type,
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.destroy = _destroy,
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},
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.set_hash = _set_hash,
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.get_hash = _get_hash,
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.destroy = _destroy,
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},
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.next_payload = PL_NONE,
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.payload_length = get_header_length(this),
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.type = type,
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);
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return &this->public;
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}
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