1675 lines
45 KiB
C
1675 lines
45 KiB
C
/*
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* Copyright (C) 2006-2007 Tobias Brunner
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* Copyright (C) 2005-2009 Martin Willi
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* Copyright (C) 2006 Daniel Roethlisberger
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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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 <stdlib.h>
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#include <string.h>
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#include "message.h"
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#include <library.h>
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#include <daemon.h>
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#include <sa/ike_sa_id.h>
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#include <encoding/generator.h>
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#include <encoding/parser.h>
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#include <utils/linked_list.h>
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#include <encoding/payloads/encodings.h>
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#include <encoding/payloads/payload.h>
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#include <encoding/payloads/encryption_payload.h>
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#include <encoding/payloads/unknown_payload.h>
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/**
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* Max number of notify payloads per IKEv2 Message
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*/
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#define MAX_NOTIFY_PAYLOADS 20
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/**
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* Max number of delete payloads per IKEv2 Message
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*/
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#define MAX_DELETE_PAYLOADS 20
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typedef struct payload_rule_t payload_rule_t;
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/**
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* A payload rule defines the rules for a payload
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* in a specific message rule. It defines if and how
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* many times a payload must/can occur in a message
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* and if it must be encrypted.
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*/
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struct payload_rule_t {
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/**
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* Payload type.
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*/
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payload_type_t payload_type;
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/**
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* Minimal occurence of this payload.
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*/
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size_t min_occurence;
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/**
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* Max occurence of this payload.
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*/
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size_t max_occurence;
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/**
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* TRUE if payload must be encrypted
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*/
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bool encrypted;
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/**
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* If this payload occurs, the message rule is
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* fullfilled in any case. This applies e.g. to
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* notify_payloads.
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*/
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bool sufficient;
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};
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typedef struct payload_order_t payload_order_t;
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/**
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* payload ordering structure allows us to reorder payloads according to RFC.
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*/
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struct payload_order_t {
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/**
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* payload type
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*/
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payload_type_t type;
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/**
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* notify type, if payload == NOTIFY
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*/
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notify_type_t notify;
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};
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typedef struct message_rule_t message_rule_t;
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/**
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* A message rule defines the kind of a message,
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* if it has encrypted contents and a list
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* of payload ordering rules and payload parsing rules.
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*/
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struct message_rule_t {
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/**
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* Type of message.
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*/
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exchange_type_t exchange_type;
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/**
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* Is message a request or response.
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*/
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bool is_request;
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/**
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* Message contains encrypted content.
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*/
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bool encrypted_content;
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/**
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* Number of payload rules which will follow
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*/
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int payload_rule_count;
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/**
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* Pointer to first payload rule
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*/
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payload_rule_t *payload_rules;
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/**
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* Number of payload order rules
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*/
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int payload_order_count;
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/**
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* payload ordering rules
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*/
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payload_order_t *payload_order;
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};
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/**
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* Message rule for IKE_SA_INIT from initiator.
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*/
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static payload_rule_t ike_sa_init_i_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, FALSE, FALSE},
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{SECURITY_ASSOCIATION, 1, 1, FALSE, FALSE},
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{KEY_EXCHANGE, 1, 1, FALSE, FALSE},
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{NONCE, 1, 1, FALSE, FALSE},
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{VENDOR_ID, 0, 10, FALSE, FALSE},
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};
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/**
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* payload order for IKE_SA_INIT initiator
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*/
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static payload_order_t ike_sa_init_i_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, COOKIE},
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{SECURITY_ASSOCIATION, 0},
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{KEY_EXCHANGE, 0},
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{NONCE, 0},
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{NOTIFY, NAT_DETECTION_SOURCE_IP},
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{NOTIFY, NAT_DETECTION_DESTINATION_IP},
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{NOTIFY, 0},
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{VENDOR_ID, 0},
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};
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/**
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* Message rule for IKE_SA_INIT from responder.
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*/
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static payload_rule_t ike_sa_init_r_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, FALSE, TRUE},
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{SECURITY_ASSOCIATION, 1, 1, FALSE, FALSE},
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{KEY_EXCHANGE, 1, 1, FALSE, FALSE},
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{NONCE, 1, 1, FALSE, FALSE},
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{VENDOR_ID, 0, 10, FALSE, FALSE},
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};
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/**
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* payload order for IKE_SA_INIT responder
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*/
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static payload_order_t ike_sa_init_r_payload_order[] = {
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/* payload type notify type */
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{SECURITY_ASSOCIATION, 0},
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{KEY_EXCHANGE, 0},
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{NONCE, 0},
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{NOTIFY, NAT_DETECTION_SOURCE_IP},
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{NOTIFY, NAT_DETECTION_DESTINATION_IP},
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{NOTIFY, HTTP_CERT_LOOKUP_SUPPORTED},
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{CERTIFICATE_REQUEST, 0},
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{NOTIFY, 0},
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{VENDOR_ID, 0},
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};
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/**
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* Message rule for IKE_AUTH from initiator.
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*/
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static payload_rule_t ike_auth_i_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, FALSE},
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{EXTENSIBLE_AUTHENTICATION, 0, 1, TRUE, TRUE},
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{AUTHENTICATION, 0, 1, TRUE, TRUE},
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{ID_INITIATOR, 0, 1, TRUE, FALSE},
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{CERTIFICATE, 0, 4, TRUE, FALSE},
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{CERTIFICATE_REQUEST, 0, 1, TRUE, FALSE},
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{ID_RESPONDER, 0, 1, TRUE, FALSE},
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#ifdef ME
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{SECURITY_ASSOCIATION, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_INITIATOR, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_RESPONDER, 0, 1, TRUE, FALSE},
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#else
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{SECURITY_ASSOCIATION, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_INITIATOR, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_RESPONDER, 0, 1, TRUE, FALSE},
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#endif /* ME */
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for IKE_AUTH initiator
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*/
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static payload_order_t ike_auth_i_payload_order[] = {
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/* payload type notify type */
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{ID_INITIATOR, 0},
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{CERTIFICATE, 0},
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{NOTIFY, INITIAL_CONTACT},
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{NOTIFY, HTTP_CERT_LOOKUP_SUPPORTED},
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{CERTIFICATE_REQUEST, 0},
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{ID_RESPONDER, 0},
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{AUTHENTICATION, 0},
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{EXTENSIBLE_AUTHENTICATION, 0},
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{CONFIGURATION, 0},
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{NOTIFY, IPCOMP_SUPPORTED},
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{NOTIFY, USE_TRANSPORT_MODE},
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{NOTIFY, ESP_TFC_PADDING_NOT_SUPPORTED},
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{NOTIFY, NON_FIRST_FRAGMENTS_ALSO},
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{SECURITY_ASSOCIATION, 0},
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{TRAFFIC_SELECTOR_INITIATOR, 0},
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{TRAFFIC_SELECTOR_RESPONDER, 0},
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{NOTIFY, MOBIKE_SUPPORTED},
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{NOTIFY, ADDITIONAL_IP4_ADDRESS},
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{NOTIFY, ADDITIONAL_IP6_ADDRESS},
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{NOTIFY, NO_ADDITIONAL_ADDRESSES},
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{NOTIFY, 0},
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{VENDOR_ID, 0},
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};
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/**
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* Message rule for IKE_AUTH from responder.
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*/
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static payload_rule_t ike_auth_r_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, TRUE},
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{EXTENSIBLE_AUTHENTICATION, 0, 1, TRUE, TRUE},
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{AUTHENTICATION, 0, 1, TRUE, TRUE},
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{CERTIFICATE, 0, 4, TRUE, FALSE},
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{ID_RESPONDER, 0, 1, TRUE, FALSE},
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{SECURITY_ASSOCIATION, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_INITIATOR, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_RESPONDER, 0, 1, TRUE, FALSE},
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for IKE_AUTH responder
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*/
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static payload_order_t ike_auth_r_payload_order[] = {
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/* payload type notify type */
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{ID_RESPONDER, 0},
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{CERTIFICATE, 0},
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{AUTHENTICATION, 0},
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{EXTENSIBLE_AUTHENTICATION, 0},
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{CONFIGURATION, 0},
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{NOTIFY, IPCOMP_SUPPORTED},
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{NOTIFY, USE_TRANSPORT_MODE},
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{NOTIFY, ESP_TFC_PADDING_NOT_SUPPORTED},
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{NOTIFY, NON_FIRST_FRAGMENTS_ALSO},
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{SECURITY_ASSOCIATION, 0},
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{TRAFFIC_SELECTOR_INITIATOR, 0},
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{TRAFFIC_SELECTOR_RESPONDER, 0},
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{NOTIFY, AUTH_LIFETIME},
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{NOTIFY, MOBIKE_SUPPORTED},
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{NOTIFY, ADDITIONAL_IP4_ADDRESS},
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{NOTIFY, ADDITIONAL_IP6_ADDRESS},
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{NOTIFY, NO_ADDITIONAL_ADDRESSES},
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{NOTIFY, 0},
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{VENDOR_ID, 0},
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};
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/**
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* Message rule for INFORMATIONAL from initiator.
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*/
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static payload_rule_t informational_i_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, FALSE},
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{DELETE, 0, MAX_DELETE_PAYLOADS, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for INFORMATIONAL initiator
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*/
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static payload_order_t informational_i_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, UPDATE_SA_ADDRESSES},
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{NOTIFY, NAT_DETECTION_SOURCE_IP},
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{NOTIFY, NAT_DETECTION_DESTINATION_IP},
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{NOTIFY, COOKIE2},
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{NOTIFY, 0},
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{DELETE, 0},
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{CONFIGURATION, 0},
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};
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/**
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* Message rule for INFORMATIONAL from responder.
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*/
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static payload_rule_t informational_r_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, FALSE},
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{DELETE, 0, MAX_DELETE_PAYLOADS, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for INFORMATIONAL responder
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*/
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static payload_order_t informational_r_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, UPDATE_SA_ADDRESSES},
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{NOTIFY, NAT_DETECTION_SOURCE_IP},
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{NOTIFY, NAT_DETECTION_DESTINATION_IP},
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{NOTIFY, COOKIE2},
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{NOTIFY, 0},
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{DELETE, 0},
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{CONFIGURATION, 0},
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};
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/**
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* Message rule for CREATE_CHILD_SA from initiator.
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*/
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static payload_rule_t create_child_sa_i_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, FALSE},
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{SECURITY_ASSOCIATION, 1, 1, TRUE, FALSE},
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{NONCE, 1, 1, TRUE, FALSE},
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{KEY_EXCHANGE, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_INITIATOR, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_RESPONDER, 0, 1, TRUE, FALSE},
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for CREATE_CHILD_SA from initiator.
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*/
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static payload_order_t create_child_sa_i_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, REKEY_SA},
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{NOTIFY, IPCOMP_SUPPORTED},
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{NOTIFY, USE_TRANSPORT_MODE},
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{NOTIFY, ESP_TFC_PADDING_NOT_SUPPORTED},
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{NOTIFY, NON_FIRST_FRAGMENTS_ALSO},
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{SECURITY_ASSOCIATION, 0},
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{NONCE, 0},
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{KEY_EXCHANGE, 0},
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{TRAFFIC_SELECTOR_INITIATOR, 0},
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{TRAFFIC_SELECTOR_RESPONDER, 0},
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{NOTIFY, 0},
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};
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/**
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* Message rule for CREATE_CHILD_SA from responder.
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*/
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static payload_rule_t create_child_sa_r_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, TRUE},
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{SECURITY_ASSOCIATION, 1, 1, TRUE, FALSE},
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{NONCE, 1, 1, TRUE, FALSE},
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{KEY_EXCHANGE, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_INITIATOR, 0, 1, TRUE, FALSE},
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{TRAFFIC_SELECTOR_RESPONDER, 0, 1, TRUE, FALSE},
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{CONFIGURATION, 0, 1, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE},
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};
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/**
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* payload order for CREATE_CHILD_SA from responder.
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*/
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static payload_order_t create_child_sa_r_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, IPCOMP_SUPPORTED},
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{NOTIFY, USE_TRANSPORT_MODE},
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{NOTIFY, ESP_TFC_PADDING_NOT_SUPPORTED},
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{NOTIFY, NON_FIRST_FRAGMENTS_ALSO},
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{SECURITY_ASSOCIATION, 0},
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{NONCE, 0},
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{KEY_EXCHANGE, 0},
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{TRAFFIC_SELECTOR_INITIATOR, 0},
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{TRAFFIC_SELECTOR_RESPONDER, 0},
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{NOTIFY, ADDITIONAL_TS_POSSIBLE},
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{NOTIFY, 0},
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};
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#ifdef ME
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/**
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* Message rule for ME_CONNECT from initiator.
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*/
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static payload_rule_t me_connect_i_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, TRUE},
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{ID_PEER, 1, 1, TRUE, FALSE},
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{VENDOR_ID, 0, 10, TRUE, FALSE}
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};
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/**
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* payload order for ME_CONNECT from initiator.
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*/
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static payload_order_t me_connect_i_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, 0},
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{ID_PEER, 0},
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{VENDOR_ID, 0},
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};
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/**
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* Message rule for ME_CONNECT from responder.
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*/
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static payload_rule_t me_connect_r_payload_rules[] = {
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/* payload type min max encr suff */
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{NOTIFY, 0, MAX_NOTIFY_PAYLOADS, TRUE, TRUE},
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{VENDOR_ID, 0, 10, TRUE, FALSE}
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};
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/**
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* payload order for ME_CONNECT from responder.
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*/
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static payload_order_t me_connect_r_payload_order[] = {
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/* payload type notify type */
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{NOTIFY, 0},
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{VENDOR_ID, 0},
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};
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#endif /* ME */
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/**
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* Message rules, defines allowed payloads.
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*/
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static message_rule_t message_rules[] = {
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{IKE_SA_INIT, TRUE, FALSE,
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(sizeof(ike_sa_init_i_payload_rules)/sizeof(payload_rule_t)),
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ike_sa_init_i_payload_rules,
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(sizeof(ike_sa_init_i_payload_order)/sizeof(payload_order_t)),
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ike_sa_init_i_payload_order,
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},
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{IKE_SA_INIT, FALSE, FALSE,
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(sizeof(ike_sa_init_r_payload_rules)/sizeof(payload_rule_t)),
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ike_sa_init_r_payload_rules,
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(sizeof(ike_sa_init_r_payload_order)/sizeof(payload_order_t)),
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ike_sa_init_r_payload_order,
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},
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{IKE_AUTH, TRUE, TRUE,
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(sizeof(ike_auth_i_payload_rules)/sizeof(payload_rule_t)),
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ike_auth_i_payload_rules,
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(sizeof(ike_auth_i_payload_order)/sizeof(payload_order_t)),
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ike_auth_i_payload_order,
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},
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{IKE_AUTH, FALSE, TRUE,
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(sizeof(ike_auth_r_payload_rules)/sizeof(payload_rule_t)),
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ike_auth_r_payload_rules,
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(sizeof(ike_auth_r_payload_order)/sizeof(payload_order_t)),
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ike_auth_r_payload_order,
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},
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{INFORMATIONAL, TRUE, TRUE,
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(sizeof(informational_i_payload_rules)/sizeof(payload_rule_t)),
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informational_i_payload_rules,
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(sizeof(informational_i_payload_order)/sizeof(payload_order_t)),
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informational_i_payload_order,
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},
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{INFORMATIONAL, FALSE, TRUE,
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(sizeof(informational_r_payload_rules)/sizeof(payload_rule_t)),
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informational_r_payload_rules,
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(sizeof(informational_r_payload_order)/sizeof(payload_order_t)),
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informational_r_payload_order,
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},
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{CREATE_CHILD_SA, TRUE, TRUE,
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(sizeof(create_child_sa_i_payload_rules)/sizeof(payload_rule_t)),
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create_child_sa_i_payload_rules,
|
|
(sizeof(create_child_sa_i_payload_order)/sizeof(payload_order_t)),
|
|
create_child_sa_i_payload_order,
|
|
},
|
|
{CREATE_CHILD_SA, FALSE, TRUE,
|
|
(sizeof(create_child_sa_r_payload_rules)/sizeof(payload_rule_t)),
|
|
create_child_sa_r_payload_rules,
|
|
(sizeof(create_child_sa_r_payload_order)/sizeof(payload_order_t)),
|
|
create_child_sa_r_payload_order,
|
|
},
|
|
#ifdef ME
|
|
{ME_CONNECT, TRUE, TRUE,
|
|
(sizeof(me_connect_i_payload_rules)/sizeof(payload_rule_t)),
|
|
me_connect_i_payload_rules,
|
|
(sizeof(me_connect_i_payload_order)/sizeof(payload_order_t)),
|
|
me_connect_i_payload_order,
|
|
},
|
|
{ME_CONNECT, FALSE, TRUE,
|
|
(sizeof(me_connect_r_payload_rules)/sizeof(payload_rule_t)),
|
|
me_connect_r_payload_rules,
|
|
(sizeof(me_connect_r_payload_order)/sizeof(payload_order_t)),
|
|
me_connect_r_payload_order,
|
|
},
|
|
#endif /* ME */
|
|
};
|
|
|
|
|
|
typedef struct private_message_t private_message_t;
|
|
|
|
/**
|
|
* Private data of an message_t object.
|
|
*/
|
|
struct private_message_t {
|
|
|
|
/**
|
|
* Public part of a message_t object.
|
|
*/
|
|
message_t public;
|
|
|
|
/**
|
|
* Minor version of message.
|
|
*/
|
|
u_int8_t major_version;
|
|
|
|
/**
|
|
* Major version of message.
|
|
*/
|
|
u_int8_t minor_version;
|
|
|
|
/**
|
|
* First Payload in message.
|
|
*/
|
|
payload_type_t first_payload;
|
|
|
|
/**
|
|
* Assigned exchange type.
|
|
*/
|
|
exchange_type_t exchange_type;
|
|
|
|
/**
|
|
* TRUE if message is a request, FALSE if a reply.
|
|
*/
|
|
bool is_request;
|
|
|
|
/**
|
|
* Message ID of this message.
|
|
*/
|
|
u_int32_t message_id;
|
|
|
|
/**
|
|
* ID of assigned IKE_SA.
|
|
*/
|
|
ike_sa_id_t *ike_sa_id;
|
|
|
|
/**
|
|
* Assigned UDP packet, stores incoming packet or last generated one.
|
|
*/
|
|
packet_t *packet;
|
|
|
|
/**
|
|
* Linked List where payload data are stored in.
|
|
*/
|
|
linked_list_t *payloads;
|
|
|
|
/**
|
|
* Assigned parser to parse Header and Body of this message.
|
|
*/
|
|
parser_t *parser;
|
|
|
|
/**
|
|
* The message rule for this message instance
|
|
*/
|
|
message_rule_t *message_rule;
|
|
};
|
|
|
|
/**
|
|
* Implementation of private_message_t.set_message_rule.
|
|
*/
|
|
static status_t set_message_rule(private_message_t *this)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < (sizeof(message_rules) / sizeof(message_rule_t)); i++)
|
|
{
|
|
if ((this->exchange_type == message_rules[i].exchange_type) &&
|
|
(this->is_request == message_rules[i].is_request))
|
|
{
|
|
/* found rule for given exchange_type*/
|
|
this->message_rule = &(message_rules[i]);
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
this->message_rule = NULL;
|
|
return NOT_FOUND;
|
|
}
|
|
|
|
/**
|
|
* Implementation of private_message_t.get_payload_rule.
|
|
*/
|
|
static status_t get_payload_rule(private_message_t *this, payload_type_t payload_type, payload_rule_t **payload_rule)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < this->message_rule->payload_rule_count;i++)
|
|
{
|
|
if (this->message_rule->payload_rules[i].payload_type == payload_type)
|
|
{
|
|
*payload_rule = &(this->message_rule->payload_rules[i]);
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
|
|
*payload_rule = NULL;
|
|
return NOT_FOUND;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_ike_sa_id.
|
|
*/
|
|
static void set_ike_sa_id (private_message_t *this,ike_sa_id_t *ike_sa_id)
|
|
{
|
|
DESTROY_IF(this->ike_sa_id);
|
|
this->ike_sa_id = ike_sa_id->clone(ike_sa_id);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_ike_sa_id.
|
|
*/
|
|
static ike_sa_id_t* get_ike_sa_id (private_message_t *this)
|
|
{
|
|
return this->ike_sa_id;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_message_id.
|
|
*/
|
|
static void set_message_id (private_message_t *this,u_int32_t message_id)
|
|
{
|
|
this->message_id = message_id;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_message_id.
|
|
*/
|
|
static u_int32_t get_message_id (private_message_t *this)
|
|
{
|
|
return this->message_id;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_initiator_spi.
|
|
*/
|
|
static u_int64_t get_initiator_spi (private_message_t *this)
|
|
{
|
|
return (this->ike_sa_id->get_initiator_spi(this->ike_sa_id));
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_responder_spi.
|
|
*/
|
|
static u_int64_t get_responder_spi (private_message_t *this)
|
|
{
|
|
return (this->ike_sa_id->get_responder_spi(this->ike_sa_id));
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_major_version.
|
|
*/
|
|
static void set_major_version (private_message_t *this,u_int8_t major_version)
|
|
{
|
|
this->major_version = major_version;
|
|
}
|
|
|
|
|
|
/**
|
|
* Implementation of message_t.set_major_version.
|
|
*/
|
|
static u_int8_t get_major_version (private_message_t *this)
|
|
{
|
|
return this->major_version;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_minor_version.
|
|
*/
|
|
static void set_minor_version (private_message_t *this,u_int8_t minor_version)
|
|
{
|
|
this->minor_version = minor_version;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_minor_version.
|
|
*/
|
|
static u_int8_t get_minor_version (private_message_t *this)
|
|
{
|
|
return this->minor_version;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_exchange_type.
|
|
*/
|
|
static void set_exchange_type (private_message_t *this,exchange_type_t exchange_type)
|
|
{
|
|
this->exchange_type = exchange_type;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_exchange_type.
|
|
*/
|
|
static exchange_type_t get_exchange_type (private_message_t *this)
|
|
{
|
|
return this->exchange_type;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_first_payload_type.
|
|
*/
|
|
static payload_type_t get_first_payload_type (private_message_t *this)
|
|
{
|
|
return this->first_payload;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_request.
|
|
*/
|
|
static void set_request (private_message_t *this,bool request)
|
|
{
|
|
this->is_request = request;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_request.
|
|
*/
|
|
static exchange_type_t get_request (private_message_t *this)
|
|
{
|
|
return this->is_request;
|
|
}
|
|
|
|
/**
|
|
* Is this message in an encoded form?
|
|
*/
|
|
static bool is_encoded(private_message_t *this)
|
|
{
|
|
chunk_t data = this->packet->get_data(this->packet);
|
|
|
|
if (data.ptr == NULL)
|
|
{
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.add_payload.
|
|
*/
|
|
static void add_payload(private_message_t *this, payload_t *payload)
|
|
{
|
|
payload_t *last_payload;
|
|
|
|
if (this->payloads->get_count(this->payloads) > 0)
|
|
{
|
|
this->payloads->get_last(this->payloads, (void **)&last_payload);
|
|
last_payload->set_next_type(last_payload, payload->get_type(payload));
|
|
}
|
|
else
|
|
{
|
|
this->first_payload = payload->get_type(payload);
|
|
}
|
|
payload->set_next_type(payload, NO_PAYLOAD);
|
|
this->payloads->insert_last(this->payloads, payload);
|
|
|
|
DBG2(DBG_ENC ,"added payload of type %N to message",
|
|
payload_type_names, payload->get_type(payload));
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.add_notify.
|
|
*/
|
|
static void add_notify(private_message_t *this, bool flush, notify_type_t type,
|
|
chunk_t data)
|
|
{
|
|
notify_payload_t *notify;
|
|
payload_t *payload;
|
|
|
|
if (flush)
|
|
{
|
|
while (this->payloads->remove_last(this->payloads,
|
|
(void**)&payload) == SUCCESS)
|
|
{
|
|
payload->destroy(payload);
|
|
}
|
|
}
|
|
notify = notify_payload_create();
|
|
notify->set_notify_type(notify, type);
|
|
notify->set_notification_data(notify, data);
|
|
add_payload(this, (payload_t*)notify);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_source.
|
|
*/
|
|
static void set_source(private_message_t *this, host_t *host)
|
|
{
|
|
this->packet->set_source(this->packet, host);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.set_destination.
|
|
*/
|
|
static void set_destination(private_message_t *this, host_t *host)
|
|
{
|
|
this->packet->set_destination(this->packet, host);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_source.
|
|
*/
|
|
static host_t* get_source(private_message_t *this)
|
|
{
|
|
return this->packet->get_source(this->packet);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_destination.
|
|
*/
|
|
static host_t * get_destination(private_message_t *this)
|
|
{
|
|
return this->packet->get_destination(this->packet);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.create_payload_enumerator.
|
|
*/
|
|
static enumerator_t *create_payload_enumerator(private_message_t *this)
|
|
{
|
|
return this->payloads->create_enumerator(this->payloads);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_payload.
|
|
*/
|
|
static payload_t *get_payload(private_message_t *this, payload_type_t type)
|
|
{
|
|
payload_t *current, *found = NULL;
|
|
enumerator_t *enumerator;
|
|
|
|
enumerator = create_payload_enumerator(this);
|
|
while (enumerator->enumerate(enumerator, ¤t))
|
|
{
|
|
if (current->get_type(current) == type)
|
|
{
|
|
found = current;
|
|
break;
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
return found;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_notify
|
|
*/
|
|
static notify_payload_t* get_notify(private_message_t *this, notify_type_t type)
|
|
{
|
|
enumerator_t *enumerator;
|
|
notify_payload_t *notify = NULL;
|
|
payload_t *payload;
|
|
|
|
enumerator = create_payload_enumerator(this);
|
|
while (enumerator->enumerate(enumerator, &payload))
|
|
{
|
|
if (payload->get_type(payload) == NOTIFY)
|
|
{
|
|
notify = (notify_payload_t*)payload;
|
|
if (notify->get_notify_type(notify) == type)
|
|
{
|
|
break;
|
|
}
|
|
notify = NULL;
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
return notify;
|
|
}
|
|
|
|
/**
|
|
* get a string representation of the message
|
|
*/
|
|
static char* get_string(private_message_t *this, char *buf, int len)
|
|
{
|
|
enumerator_t *enumerator;
|
|
payload_t *payload;
|
|
int written;
|
|
char *pos = buf;
|
|
|
|
memset(buf, 0, len);
|
|
len--;
|
|
|
|
written = snprintf(pos, len, "%N %s %d [",
|
|
exchange_type_names, this->exchange_type,
|
|
this->is_request ? "request" : "response",
|
|
this->message_id);
|
|
if (written >= len || written < 0)
|
|
{
|
|
return "";
|
|
}
|
|
pos += written;
|
|
len -= written;
|
|
|
|
enumerator = create_payload_enumerator(this);
|
|
while (enumerator->enumerate(enumerator, &payload))
|
|
{
|
|
written = snprintf(pos, len, " %N", payload_type_short_names,
|
|
payload->get_type(payload));
|
|
if (written >= len || written < 0)
|
|
{
|
|
return buf;
|
|
}
|
|
pos += written;
|
|
len -= written;
|
|
if (payload->get_type(payload) == NOTIFY)
|
|
{
|
|
notify_payload_t *notify = (notify_payload_t*)payload;
|
|
written = snprintf(pos, len, "(%N)", notify_type_short_names,
|
|
notify->get_notify_type(notify));
|
|
if (written >= len || written < 0)
|
|
{
|
|
return buf;
|
|
}
|
|
pos += written;
|
|
len -= written;
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
/* remove last space */
|
|
snprintf(pos, len, " ]");
|
|
return buf;
|
|
}
|
|
|
|
/**
|
|
* reorder payloads depending on reordering rules
|
|
*/
|
|
static void order_payloads(private_message_t *this)
|
|
{
|
|
linked_list_t *list;
|
|
payload_t *payload;
|
|
int i;
|
|
|
|
/* move to temp list */
|
|
list = linked_list_create();
|
|
while (this->payloads->remove_last(this->payloads,
|
|
(void**)&payload) == SUCCESS)
|
|
{
|
|
list->insert_first(list, payload);
|
|
}
|
|
/* for each rule, ... */
|
|
for (i = 0; i < this->message_rule->payload_order_count; i++)
|
|
{
|
|
enumerator_t *enumerator;
|
|
notify_payload_t *notify;
|
|
payload_order_t order = this->message_rule->payload_order[i];
|
|
|
|
/* ... find all payload ... */
|
|
enumerator = list->create_enumerator(list);
|
|
while (enumerator->enumerate(enumerator, &payload))
|
|
{
|
|
/* ... with that type ... */
|
|
if (payload->get_type(payload) == order.type)
|
|
{
|
|
notify = (notify_payload_t*)payload;
|
|
|
|
/**... and check notify for type. */
|
|
if (order.type != NOTIFY || order.notify == 0 ||
|
|
order.notify == notify->get_notify_type(notify))
|
|
{
|
|
list->remove_at(list, enumerator);
|
|
add_payload(this, payload);
|
|
}
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
}
|
|
/* append all payloads without a rule to the end */
|
|
while (list->remove_last(list, (void**)&payload) == SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "payload %N has no ordering rule in %N %s",
|
|
payload_type_names, payload->get_type(payload),
|
|
exchange_type_names, this->message_rule->exchange_type,
|
|
this->message_rule->is_request ? "request" : "response");
|
|
add_payload(this, payload);
|
|
}
|
|
list->destroy(list);
|
|
}
|
|
|
|
/**
|
|
* Implementation of private_message_t.encrypt_payloads.
|
|
*/
|
|
static status_t encrypt_payloads(private_message_t *this,
|
|
crypter_t *crypter, signer_t* signer)
|
|
{
|
|
encryption_payload_t *encryption_payload = NULL;
|
|
status_t status;
|
|
linked_list_t *all_payloads;
|
|
|
|
if (!this->message_rule->encrypted_content)
|
|
{
|
|
DBG2(DBG_ENC, "message doesn't have to be encrypted");
|
|
/* message contains no content to encrypt */
|
|
return SUCCESS;
|
|
}
|
|
|
|
if (!crypter || !signer)
|
|
{
|
|
DBG2(DBG_ENC, "no crypter or signer specified, do not encrypt message");
|
|
/* message contains no content to encrypt */
|
|
return SUCCESS;
|
|
}
|
|
|
|
DBG2(DBG_ENC, "copy all payloads to a temporary list");
|
|
all_payloads = linked_list_create();
|
|
|
|
/* first copy all payloads in a temporary list */
|
|
while (this->payloads->get_count(this->payloads) > 0)
|
|
{
|
|
void *current_payload;
|
|
this->payloads->remove_first(this->payloads,¤t_payload);
|
|
all_payloads->insert_last(all_payloads,current_payload);
|
|
}
|
|
|
|
encryption_payload = encryption_payload_create();
|
|
|
|
DBG2(DBG_ENC, "check each payloads if they have to get encrypted");
|
|
while (all_payloads->get_count(all_payloads) > 0)
|
|
{
|
|
payload_rule_t *payload_rule;
|
|
payload_t *current_payload;
|
|
bool to_encrypt = FALSE;
|
|
|
|
all_payloads->remove_first(all_payloads,(void **)¤t_payload);
|
|
|
|
status = get_payload_rule(this,
|
|
current_payload->get_type(current_payload),&payload_rule);
|
|
/* for payload types which are not found in supported payload list,
|
|
* it is presumed that they don't have to be encrypted */
|
|
if ((status == SUCCESS) && (payload_rule->encrypted))
|
|
{
|
|
DBG2(DBG_ENC, "payload %N gets encrypted",
|
|
payload_type_names, current_payload->get_type(current_payload));
|
|
to_encrypt = TRUE;
|
|
}
|
|
|
|
if (to_encrypt)
|
|
{
|
|
DBG2(DBG_ENC, "insert payload %N to encryption payload",
|
|
payload_type_names, current_payload->get_type(current_payload));
|
|
encryption_payload->add_payload(encryption_payload,current_payload);
|
|
}
|
|
else
|
|
{
|
|
DBG2(DBG_ENC, "insert payload %N unencrypted",
|
|
payload_type_names ,current_payload->get_type(current_payload));
|
|
add_payload(this, (payload_t*)encryption_payload);
|
|
}
|
|
}
|
|
|
|
status = SUCCESS;
|
|
DBG2(DBG_ENC, "encrypting encryption payload");
|
|
encryption_payload->set_transforms(encryption_payload, crypter,signer);
|
|
status = encryption_payload->encrypt(encryption_payload);
|
|
DBG2(DBG_ENC, "add encrypted payload to payload list");
|
|
add_payload(this, (payload_t*)encryption_payload);
|
|
|
|
all_payloads->destroy(all_payloads);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.generate.
|
|
*/
|
|
static status_t generate(private_message_t *this, crypter_t *crypter,
|
|
signer_t* signer, packet_t **packet)
|
|
{
|
|
generator_t *generator;
|
|
ike_header_t *ike_header;
|
|
payload_t *payload, *next_payload;
|
|
enumerator_t *enumerator;
|
|
status_t status;
|
|
chunk_t packet_data;
|
|
char str[256];
|
|
|
|
if (is_encoded(this))
|
|
{
|
|
/* already generated, return a new packet clone */
|
|
*packet = this->packet->clone(this->packet);
|
|
return SUCCESS;
|
|
}
|
|
|
|
if (this->exchange_type == EXCHANGE_TYPE_UNDEFINED)
|
|
{
|
|
DBG1(DBG_ENC, "exchange type is not defined");
|
|
return INVALID_STATE;
|
|
}
|
|
|
|
if (this->packet->get_source(this->packet) == NULL ||
|
|
this->packet->get_destination(this->packet) == NULL)
|
|
{
|
|
DBG1(DBG_ENC, "%s not defined",
|
|
!this->packet->get_source(this->packet) ? "source" : "destination");
|
|
return INVALID_STATE;
|
|
}
|
|
|
|
/* set the rules for this messge */
|
|
status = set_message_rule(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "no message rules specified for this message type");
|
|
return NOT_SUPPORTED;
|
|
}
|
|
|
|
order_payloads(this);
|
|
|
|
DBG1(DBG_ENC, "generating %s", get_string(this, str, sizeof(str)));
|
|
|
|
/* going to encrypt all content which have to be encrypted */
|
|
status = encrypt_payloads(this, crypter, signer);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "payload encryption failed");
|
|
return status;
|
|
}
|
|
|
|
/* build ike header */
|
|
ike_header = ike_header_create();
|
|
|
|
ike_header->set_exchange_type(ike_header, this->exchange_type);
|
|
ike_header->set_message_id(ike_header, this->message_id);
|
|
ike_header->set_response_flag(ike_header, !this->is_request);
|
|
ike_header->set_initiator_flag(ike_header, this->ike_sa_id->is_initiator(this->ike_sa_id));
|
|
ike_header->set_initiator_spi(ike_header, this->ike_sa_id->get_initiator_spi(this->ike_sa_id));
|
|
ike_header->set_responder_spi(ike_header, this->ike_sa_id->get_responder_spi(this->ike_sa_id));
|
|
|
|
generator = generator_create();
|
|
|
|
payload = (payload_t*)ike_header;
|
|
|
|
/* generate every payload expect last one, this is done later*/
|
|
enumerator = create_payload_enumerator(this);
|
|
while (enumerator->enumerate(enumerator, &next_payload))
|
|
{
|
|
payload->set_next_type(payload, next_payload->get_type(next_payload));
|
|
generator->generate_payload(generator, payload);
|
|
payload = next_payload;
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
/* last payload has no next payload*/
|
|
payload->set_next_type(payload, NO_PAYLOAD);
|
|
|
|
generator->generate_payload(generator, payload);
|
|
|
|
ike_header->destroy(ike_header);
|
|
|
|
/* build packet */
|
|
generator->write_to_chunk(generator, &packet_data);
|
|
generator->destroy(generator);
|
|
|
|
/* if last payload is of type encrypted, integrity checksum if necessary */
|
|
if (payload->get_type(payload) == ENCRYPTED)
|
|
{
|
|
DBG2(DBG_ENC, "build signature on whole message");
|
|
encryption_payload_t *encryption_payload = (encryption_payload_t*)payload;
|
|
status = encryption_payload->build_signature(encryption_payload, packet_data);
|
|
if (status != SUCCESS)
|
|
{
|
|
return status;
|
|
}
|
|
}
|
|
|
|
this->packet->set_data(this->packet, packet_data);
|
|
|
|
/* clone packet for caller */
|
|
*packet = this->packet->clone(this->packet);
|
|
|
|
DBG2(DBG_ENC, "message generated successfully");
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_packet.
|
|
*/
|
|
static packet_t *get_packet (private_message_t *this)
|
|
{
|
|
if (this->packet == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
return this->packet->clone(this->packet);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_packet_data.
|
|
*/
|
|
static chunk_t get_packet_data (private_message_t *this)
|
|
{
|
|
if (this->packet == NULL)
|
|
{
|
|
return chunk_empty;
|
|
}
|
|
return chunk_clone(this->packet->get_data(this->packet));
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.parse_header.
|
|
*/
|
|
static status_t parse_header(private_message_t *this)
|
|
{
|
|
ike_header_t *ike_header;
|
|
status_t status;
|
|
|
|
DBG2(DBG_ENC, "parsing header of message");
|
|
|
|
this->parser->reset_context(this->parser);
|
|
status = this->parser->parse_payload(this->parser,HEADER,(payload_t **) &ike_header);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "header could not be parsed");
|
|
return status;
|
|
|
|
}
|
|
|
|
/* verify payload */
|
|
status = ike_header->payload_interface.verify(&(ike_header->payload_interface));
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "header verification failed");
|
|
ike_header->destroy(ike_header);
|
|
return status;
|
|
}
|
|
|
|
if (this->ike_sa_id != NULL)
|
|
{
|
|
this->ike_sa_id->destroy(this->ike_sa_id);
|
|
}
|
|
|
|
this->ike_sa_id = ike_sa_id_create(ike_header->get_initiator_spi(ike_header),
|
|
ike_header->get_responder_spi(ike_header),
|
|
ike_header->get_initiator_flag(ike_header));
|
|
|
|
this->exchange_type = ike_header->get_exchange_type(ike_header);
|
|
this->message_id = ike_header->get_message_id(ike_header);
|
|
this->is_request = (!(ike_header->get_response_flag(ike_header)));
|
|
this->major_version = ike_header->get_maj_version(ike_header);
|
|
this->minor_version = ike_header->get_min_version(ike_header);
|
|
this->first_payload = ike_header->payload_interface.get_next_type(&(ike_header->payload_interface));
|
|
|
|
DBG2(DBG_ENC, "parsed a %N %s", exchange_type_names, this->exchange_type,
|
|
this->is_request ? "request" : "response");
|
|
|
|
ike_header->destroy(ike_header);
|
|
|
|
/* get the rules for this messge */
|
|
status = set_message_rule(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "no message rules specified for a %N %s",
|
|
exchange_type_names, this->exchange_type,
|
|
this->is_request ? "request" : "response");
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Implementation of private_message_t.decrypt_and_verify_payloads.
|
|
*/
|
|
static status_t decrypt_payloads(private_message_t *this,crypter_t *crypter, signer_t* signer)
|
|
{
|
|
bool current_payload_was_encrypted = FALSE;
|
|
payload_t *previous_payload = NULL;
|
|
int payload_number = 1;
|
|
iterator_t *iterator;
|
|
payload_t *current_payload;
|
|
status_t status;
|
|
|
|
iterator = this->payloads->create_iterator(this->payloads,TRUE);
|
|
|
|
/* process each payload and decrypt a encryption payload */
|
|
while(iterator->iterate(iterator, (void**)¤t_payload))
|
|
{
|
|
payload_rule_t *payload_rule;
|
|
payload_type_t current_payload_type;
|
|
|
|
/* needed to check */
|
|
current_payload_type = current_payload->get_type(current_payload);
|
|
|
|
DBG2(DBG_ENC, "process payload of type %N",
|
|
payload_type_names, current_payload_type);
|
|
|
|
if (current_payload_type == ENCRYPTED)
|
|
{
|
|
encryption_payload_t *encryption_payload;
|
|
payload_t *current_encrypted_payload;
|
|
|
|
encryption_payload = (encryption_payload_t*)current_payload;
|
|
|
|
DBG2(DBG_ENC, "found an encryption payload");
|
|
|
|
if (payload_number != this->payloads->get_count(this->payloads))
|
|
{
|
|
/* encrypted payload is not last one */
|
|
DBG1(DBG_ENC, "encrypted payload is not last payload");
|
|
iterator->destroy(iterator);
|
|
return VERIFY_ERROR;
|
|
}
|
|
/* decrypt */
|
|
encryption_payload->set_transforms(encryption_payload, crypter, signer);
|
|
DBG2(DBG_ENC, "verify signature of encryption payload");
|
|
status = encryption_payload->verify_signature(encryption_payload,
|
|
this->packet->get_data(this->packet));
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "encryption payload signature invalid");
|
|
iterator->destroy(iterator);
|
|
return FAILED;
|
|
}
|
|
DBG2(DBG_ENC, "decrypting content of encryption payload");
|
|
status = encryption_payload->decrypt(encryption_payload);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "encrypted payload could not be decrypted and parsed");
|
|
iterator->destroy(iterator);
|
|
return PARSE_ERROR;
|
|
}
|
|
|
|
/* needed later to find out if a payload was encrypted */
|
|
current_payload_was_encrypted = TRUE;
|
|
|
|
/* check if there are payloads contained in the encryption payload */
|
|
if (encryption_payload->get_payload_count(encryption_payload) == 0)
|
|
{
|
|
DBG2(DBG_ENC, "encrypted payload is empty");
|
|
/* remove the encryption payload, is not needed anymore */
|
|
iterator->remove(iterator);
|
|
/* encrypted payload contains no other payload */
|
|
current_payload_type = NO_PAYLOAD;
|
|
}
|
|
else
|
|
{
|
|
/* encryption_payload is replaced with first payload contained in encryption_payload */
|
|
encryption_payload->remove_first_payload(encryption_payload, ¤t_encrypted_payload);
|
|
iterator->replace(iterator,NULL,(void *) current_encrypted_payload);
|
|
current_payload_type = current_encrypted_payload->get_type(current_encrypted_payload);
|
|
}
|
|
|
|
/* is the current paylad the first in the message? */
|
|
if (previous_payload == NULL)
|
|
{
|
|
/* yes, set the first payload type of the message to the current type */
|
|
this->first_payload = current_payload_type;
|
|
}
|
|
else
|
|
{
|
|
/* no, set the next_type of the previous payload to the current type */
|
|
previous_payload->set_next_type(previous_payload, current_payload_type);
|
|
}
|
|
|
|
/* all encrypted payloads are added to the payload list */
|
|
while (encryption_payload->get_payload_count(encryption_payload) > 0)
|
|
{
|
|
encryption_payload->remove_first_payload(encryption_payload, ¤t_encrypted_payload);
|
|
DBG2(DBG_ENC, "insert unencrypted payload of type %N at end of list",
|
|
payload_type_names, current_encrypted_payload->get_type(current_encrypted_payload));
|
|
this->payloads->insert_last(this->payloads,current_encrypted_payload);
|
|
}
|
|
|
|
/* encryption payload is processed, payloads are moved. Destroy it. */
|
|
encryption_payload->destroy(encryption_payload);
|
|
}
|
|
|
|
/* we allow unknown payloads of any type and don't bother if it was encrypted. Not our problem. */
|
|
if (current_payload_type != UNKNOWN_PAYLOAD && current_payload_type != NO_PAYLOAD)
|
|
{
|
|
/* get the ruleset for found payload */
|
|
status = get_payload_rule(this, current_payload_type, &payload_rule);
|
|
if (status != SUCCESS)
|
|
{
|
|
/* payload is not allowed */
|
|
DBG1(DBG_ENC, "payload type %N not allowed",
|
|
payload_type_names, current_payload_type);
|
|
iterator->destroy(iterator);
|
|
return VERIFY_ERROR;
|
|
}
|
|
|
|
/* check if the payload was encrypted, and if it should been have encrypted */
|
|
if (payload_rule->encrypted != current_payload_was_encrypted)
|
|
{
|
|
/* payload was not encrypted, but should have been. or vice-versa */
|
|
DBG1(DBG_ENC, "payload type %N should be %s!",
|
|
payload_type_names, current_payload_type,
|
|
(payload_rule->encrypted) ? "encrypted" : "not encrypted");
|
|
iterator->destroy(iterator);
|
|
return VERIFY_ERROR;
|
|
}
|
|
}
|
|
/* advance to the next payload */
|
|
payload_number++;
|
|
/* is stored to set next payload in case of found encryption payload */
|
|
previous_payload = current_payload;
|
|
}
|
|
iterator->destroy(iterator);
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of private_message_t.verify.
|
|
*/
|
|
static status_t verify(private_message_t *this)
|
|
{
|
|
int i;
|
|
enumerator_t *enumerator;
|
|
payload_t *current_payload;
|
|
size_t total_found_payloads = 0;
|
|
|
|
DBG2(DBG_ENC, "verifying message structure");
|
|
|
|
/* check for payloads with wrong count*/
|
|
for (i = 0; i < this->message_rule->payload_rule_count; i++)
|
|
{
|
|
size_t found_payloads = 0;
|
|
payload_rule_t *rule;
|
|
|
|
rule = &this->message_rule->payload_rules[i];
|
|
enumerator = create_payload_enumerator(this);
|
|
|
|
/* check all payloads for specific rule */
|
|
while (enumerator->enumerate(enumerator, ¤t_payload))
|
|
{
|
|
payload_type_t current_payload_type;
|
|
unknown_payload_t *unknown_payload;
|
|
|
|
current_payload_type = current_payload->get_type(current_payload);
|
|
if (current_payload_type == UNKNOWN_PAYLOAD)
|
|
{
|
|
/* unknown payloads are ignored, IF they are not critical */
|
|
unknown_payload = (unknown_payload_t*)current_payload;
|
|
if (unknown_payload->is_critical(unknown_payload))
|
|
{
|
|
DBG1(DBG_ENC, "%N is not supported, but its critical!",
|
|
payload_type_names, current_payload_type);
|
|
enumerator->destroy(enumerator);
|
|
return NOT_SUPPORTED;
|
|
}
|
|
}
|
|
else if (current_payload_type == rule->payload_type)
|
|
{
|
|
found_payloads++;
|
|
total_found_payloads++;
|
|
DBG2(DBG_ENC, "found payload of type %N", payload_type_names,
|
|
rule->payload_type);
|
|
|
|
/* as soon as ohe payload occures more then specified,
|
|
* the verification fails */
|
|
if (found_payloads >
|
|
rule->max_occurence)
|
|
{
|
|
DBG1(DBG_ENC, "payload of type %N more than %d times (%d) "
|
|
"occured in current message", payload_type_names,
|
|
current_payload_type, rule->max_occurence,
|
|
found_payloads);
|
|
enumerator->destroy(enumerator);
|
|
return VERIFY_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (found_payloads < rule->min_occurence)
|
|
{
|
|
DBG1(DBG_ENC, "payload of type %N not occured %d times (%d)",
|
|
payload_type_names, rule->payload_type, rule->min_occurence,
|
|
found_payloads);
|
|
enumerator->destroy(enumerator);
|
|
return VERIFY_ERROR;
|
|
}
|
|
if (rule->sufficient &&
|
|
this->payloads->get_count(this->payloads) == total_found_payloads)
|
|
{
|
|
enumerator->destroy(enumerator);
|
|
return SUCCESS;
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.parse_body.
|
|
*/
|
|
static status_t parse_body(private_message_t *this, crypter_t *crypter, signer_t *signer)
|
|
{
|
|
status_t status = SUCCESS;
|
|
payload_type_t current_payload_type;
|
|
char str[256];
|
|
|
|
current_payload_type = this->first_payload;
|
|
|
|
DBG2(DBG_ENC, "parsing body of message, first payload is %N",
|
|
payload_type_names, current_payload_type);
|
|
|
|
/* parse payload for payload, while there are more available */
|
|
while ((current_payload_type != NO_PAYLOAD))
|
|
{
|
|
payload_t *current_payload;
|
|
|
|
DBG2(DBG_ENC, "starting parsing a %N payload",
|
|
payload_type_names, current_payload_type);
|
|
|
|
/* parse current payload */
|
|
status = this->parser->parse_payload(this->parser,current_payload_type,(payload_t **) ¤t_payload);
|
|
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "payload type %N could not be parsed",
|
|
payload_type_names, current_payload_type);
|
|
return PARSE_ERROR;
|
|
}
|
|
|
|
DBG2(DBG_ENC, "verifying payload of type %N",
|
|
payload_type_names, current_payload_type);
|
|
|
|
/* verify it, stop parsig if its invalid */
|
|
status = current_payload->verify(current_payload);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "%N payload verification failed",
|
|
payload_type_names, current_payload_type);
|
|
current_payload->destroy(current_payload);
|
|
return VERIFY_ERROR;
|
|
}
|
|
|
|
DBG2(DBG_ENC, "%N payload verified. Adding to payload list",
|
|
payload_type_names, current_payload_type);
|
|
this->payloads->insert_last(this->payloads,current_payload);
|
|
|
|
/* an encryption payload is the last one, so STOP here. decryption is done later */
|
|
if (current_payload_type == ENCRYPTED)
|
|
{
|
|
DBG2(DBG_ENC, "%N payload found. Stop parsing",
|
|
payload_type_names, current_payload_type);
|
|
break;
|
|
}
|
|
|
|
/* get next payload type */
|
|
current_payload_type = current_payload->get_next_type(current_payload);
|
|
}
|
|
|
|
if (current_payload_type == ENCRYPTED)
|
|
{
|
|
status = decrypt_payloads(this,crypter,signer);
|
|
if (status != SUCCESS)
|
|
{
|
|
DBG1(DBG_ENC, "could not decrypt payloads");
|
|
return status;
|
|
}
|
|
}
|
|
|
|
status = verify(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
return status;
|
|
}
|
|
|
|
DBG1(DBG_ENC, "parsed %s", get_string(this, str, sizeof(str)));
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.destroy.
|
|
*/
|
|
static void destroy (private_message_t *this)
|
|
{
|
|
DESTROY_IF(this->ike_sa_id);
|
|
this->payloads->destroy_offset(this->payloads, offsetof(payload_t, destroy));
|
|
this->packet->destroy(this->packet);
|
|
this->parser->destroy(this->parser);
|
|
free(this);
|
|
}
|
|
|
|
/*
|
|
* Described in Header-File
|
|
*/
|
|
message_t *message_create_from_packet(packet_t *packet)
|
|
{
|
|
private_message_t *this = malloc_thing(private_message_t);
|
|
|
|
/* public functions */
|
|
this->public.set_major_version = (void(*)(message_t*, u_int8_t))set_major_version;
|
|
this->public.get_major_version = (u_int8_t(*)(message_t*))get_major_version;
|
|
this->public.set_minor_version = (void(*)(message_t*, u_int8_t))set_minor_version;
|
|
this->public.get_minor_version = (u_int8_t(*)(message_t*))get_minor_version;
|
|
this->public.set_message_id = (void(*)(message_t*, u_int32_t))set_message_id;
|
|
this->public.get_message_id = (u_int32_t(*)(message_t*))get_message_id;
|
|
this->public.get_initiator_spi = (u_int64_t(*)(message_t*))get_initiator_spi;
|
|
this->public.get_responder_spi = (u_int64_t(*)(message_t*))get_responder_spi;
|
|
this->public.set_ike_sa_id = (void(*)(message_t*, ike_sa_id_t *))set_ike_sa_id;
|
|
this->public.get_ike_sa_id = (ike_sa_id_t*(*)(message_t*))get_ike_sa_id;
|
|
this->public.set_exchange_type = (void(*)(message_t*, exchange_type_t))set_exchange_type;
|
|
this->public.get_exchange_type = (exchange_type_t(*)(message_t*))get_exchange_type;
|
|
this->public.get_first_payload_type = (payload_type_t(*)(message_t*))get_first_payload_type;
|
|
this->public.set_request = (void(*)(message_t*, bool))set_request;
|
|
this->public.get_request = (bool(*)(message_t*))get_request;
|
|
this->public.add_payload = (void(*)(message_t*,payload_t*))add_payload;
|
|
this->public.add_notify = (void(*)(message_t*,bool,notify_type_t,chunk_t))add_notify;
|
|
this->public.generate = (status_t (*) (message_t *,crypter_t*,signer_t*,packet_t**)) generate;
|
|
this->public.set_source = (void (*) (message_t*,host_t*)) set_source;
|
|
this->public.get_source = (host_t * (*) (message_t*)) get_source;
|
|
this->public.set_destination = (void (*) (message_t*,host_t*)) set_destination;
|
|
this->public.get_destination = (host_t * (*) (message_t*)) get_destination;
|
|
this->public.create_payload_enumerator = (enumerator_t * (*) (message_t *)) create_payload_enumerator;
|
|
this->public.get_payload = (payload_t * (*) (message_t *, payload_type_t)) get_payload;
|
|
this->public.get_notify = (notify_payload_t*(*)(message_t*, notify_type_t type))get_notify;
|
|
this->public.parse_header = (status_t (*) (message_t *)) parse_header;
|
|
this->public.parse_body = (status_t (*) (message_t *,crypter_t*,signer_t*)) parse_body;
|
|
this->public.get_packet = (packet_t * (*) (message_t*)) get_packet;
|
|
this->public.get_packet_data = (chunk_t (*) (message_t *this)) get_packet_data;
|
|
this->public.destroy = (void(*)(message_t*))destroy;
|
|
|
|
/* private values */
|
|
this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
|
|
this->is_request = TRUE;
|
|
this->ike_sa_id = NULL;
|
|
this->first_payload = NO_PAYLOAD;
|
|
this->message_id = 0;
|
|
|
|
/* private values */
|
|
if (packet == NULL)
|
|
{
|
|
packet = packet_create();
|
|
}
|
|
this->message_rule = NULL;
|
|
this->packet = packet;
|
|
this->payloads = linked_list_create();
|
|
|
|
/* parser is created from data of packet */
|
|
this->parser = parser_create(this->packet->get_data(this->packet));
|
|
|
|
return (&this->public);
|
|
}
|
|
|
|
/*
|
|
* Described in Header.
|
|
*/
|
|
message_t *message_create()
|
|
{
|
|
return message_create_from_packet(NULL);
|
|
}
|
|
|