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/* IKEv2 message routines, for Libreswan
*
* Copyright (C) 2018 Andrew Cagney
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef IKEV2_MESSAGE_H
#define IKEV2_MESSAGE_H
#include "chunk.h"
#include "message_role.h"
#include "packet.h" /* for struct pbs_out; */
struct msg_digest;
struct dh_desc;
struct ike_sa;
struct state;
struct spd_end;
struct host_end;
struct v2_incoming_fragments;
/*
* Outgoing messages.
*/
struct v2SK_payload {
/* public */
struct logger *logger;
struct ike_sa *ike;
struct pbs_out pbs; /* within SK */
/* private */
/* pointers into SK header+contents */
chunk_t payload; /* aad+wire_iv+cleartext+padding+integrity */
chunk_t aad;
chunk_t wire_iv;
chunk_t cleartext;
chunk_t padding;
chunk_t integrity;
};
bool encrypt_v2SK_payload(struct v2SK_payload *sk);
uint8_t build_ikev2_critical(bool impair, struct logger *logger);
enum payload_security {
ENCRYPTED_PAYLOAD = 1,
UNENCRYPTED_PAYLOAD,
};
struct v2_message {
/* CONTAINS POINTERS to SELF; pass by ref */
struct logger *logger;
struct pbs_out *pbs; /* where to put message (POINTER!); either .BODY or .SK */
/* internal fields */
enum payload_security security;
struct pbs_out message;
struct pbs_out body;
const char *story;
struct v2_outgoing_fragment **outgoing_fragments;
struct v2SK_payload sk; /* optional */
};
bool open_v2_message(const char *story,
struct ike_sa *ike, struct logger *logger,
struct msg_digest *request_md,
enum ikev2_exchange exchange_type,
uint8_t *buffer, size_t sizeof_buffer,
struct v2_message *message,
enum payload_security security);
bool close_v2_message(struct v2_message *message);
bool close_and_record_v2_message(struct v2_message *message);
/*
* Incoming Message fragments.
*/
enum collected_fragment {
FRAGMENT_IGNORED,
FRAGMENTS_MISSING,
FRAGMENTS_COMPLETE,
};
enum collected_fragment collect_v2_incoming_fragment(struct ike_sa *ike,
struct msg_digest *md,
struct v2_incoming_fragments **frags);
bool decrypt_v2_incoming_fragments(struct ike_sa *ike,
struct v2_incoming_fragments **frags);
struct msg_digest *reassemble_v2_incoming_fragments(struct v2_incoming_fragments **frags);
bool ikev2_decrypt_msg(struct ike_sa *ike, struct msg_digest *md);
struct ikev2_id build_v2_id_payload(const struct host_end *end, shunk_t *body,
const char *what, struct logger *logger);
#endif
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