1253 lines
37 KiB
C
1253 lines
37 KiB
C
/**
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* @file message.c
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*
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* @brief Implementation of message_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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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 "message.h"
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#include <types.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 <utils/allocator.h>
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#include <utils/logger_manager.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 10
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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 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 rules.
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*
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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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size_t 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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/**
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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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{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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};
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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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{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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};
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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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{NOTIFY,0,MAX_NOTIFY_PAYLOADS,TRUE,FALSE},
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{ID_INITIATOR,1,1,TRUE,FALSE},
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{CERTIFICATE,0,1,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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{AUTHENTICATION,1,1,TRUE,FALSE},
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{SECURITY_ASSOCIATION,1,1,TRUE,FALSE},
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{TRAFFIC_SELECTOR_INITIATOR,1,1,TRUE,FALSE},
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{TRAFFIC_SELECTOR_RESPONDER,1,1,TRUE,FALSE},
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{CONFIGURATION,0,1,TRUE,FALSE},
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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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{NOTIFY,0,MAX_NOTIFY_PAYLOADS,TRUE,TRUE},
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{CERTIFICATE,0,1,TRUE,FALSE},
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{ID_RESPONDER,1,1,TRUE,FALSE},
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{AUTHENTICATION,1,1,TRUE,FALSE},
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{SECURITY_ASSOCIATION,1,1,TRUE,FALSE},
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{TRAFFIC_SELECTOR_INITIATOR,1,1,TRUE,FALSE},
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{TRAFFIC_SELECTOR_RESPONDER,1,1,TRUE,FALSE},
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{CONFIGURATION,0,1,TRUE,FALSE},
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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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{NOTIFY,0,MAX_NOTIFY_PAYLOADS,TRUE,FALSE},
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{CONFIGURATION,0,1,TRUE,FALSE},
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{DELETE,0,1,TRUE,FALSE},
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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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{NOTIFY,0,MAX_NOTIFY_PAYLOADS,TRUE,FALSE},
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{CONFIGURATION,0,1,TRUE,FALSE},
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{DELETE,0,1,TRUE,FALSE},
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};
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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,(sizeof(ike_sa_init_i_payload_rules)/sizeof(payload_rule_t)),ike_sa_init_i_payload_rules},
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{IKE_SA_INIT,FALSE,FALSE,(sizeof(ike_sa_init_r_payload_rules)/sizeof(payload_rule_t)),ike_sa_init_r_payload_rules},
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{IKE_AUTH,TRUE,TRUE,(sizeof(ike_auth_i_payload_rules)/sizeof(payload_rule_t)),ike_auth_i_payload_rules},
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{IKE_AUTH,FALSE,TRUE,(sizeof(ike_auth_r_payload_rules)/sizeof(payload_rule_t)),ike_auth_r_payload_rules},
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{INFORMATIONAL,TRUE,TRUE,(sizeof(informational_i_payload_rules)/sizeof(payload_rule_t)),informational_i_payload_rules},
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{INFORMATIONAL,FALSE,TRUE,(sizeof(informational_r_payload_rules)/sizeof(payload_rule_t)),informational_r_payload_rules}
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};
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typedef struct private_message_t private_message_t;
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/**
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* Private data of an message_t object.
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*/
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struct private_message_t {
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/**
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* Public part of a message_t object.
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*/
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message_t public;
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/**
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* Minor version of message.
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*/
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u_int8_t major_version;
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/**
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* Major version of message.
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*/
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u_int8_t minor_version;
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/**
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* First Payload in message.
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*/
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payload_type_t first_payload;
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/**
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* Assigned exchange type.
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*/
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exchange_type_t exchange_type;
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/**
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* TRUE if message is a request, FALSE if a reply.
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*/
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bool is_request;
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/**
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* Message ID of this message.
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*/
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u_int32_t message_id;
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/**
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* ID of assigned IKE_SA.
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*/
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ike_sa_id_t *ike_sa_id;
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/**
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* Assigned UDP packet, stores incoming packet or last generated one.
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*/
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packet_t *packet;
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/**
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* Linked List where payload data are stored in.
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*/
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linked_list_t *payloads;
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/**
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* Assigned parser to parse Header and Body of this message.
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*/
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parser_t *parser;
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/**
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* The message rule for this message instance
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*/
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message_rule_t *message_rule;
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/**
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* Assigned logger.
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*/
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logger_t *logger;
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/**
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* Sets the private message_rule member to the rule which
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* applies to this message. Must be called before get_payload_rule().
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*
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* @param this calling object
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* @return
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* - SUCCESS
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* - NOT_FOUND if no message rule applies to this message.
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*/
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status_t (*set_message_rule) (private_message_t *this);
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/**
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* Gets the payload_rule_t for a specific message_rule_t and payload type.
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*
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* @param this calling object
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* @param payload_type payload type
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* @param[out] payload_rule returned payload_rule_t
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* @return
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* - SUCCESS
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* - NOT_FOUND if payload not defined in current message rule
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* - INVALID_STATE if message rule is not set via set_message_rule()
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*/
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status_t (*get_payload_rule) (private_message_t *this, payload_type_t payload_type, payload_rule_t **payload_rule);
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/**
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* Encrypts all payloads which has to get encrypted.
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*
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* Can also be called with messages not containing encrypted content.
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*
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* @param this calling object
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* @param crypter crypter_t object
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* @param signer signer_t object
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* @return
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* - SUCCESS
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* - INVALID_STATE if no crypter/signer supplied but needed
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*/
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status_t (*encrypt_payloads) (private_message_t *this,crypter_t *crypter, signer_t* signer);
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/**
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* Decrypts encrypted contents, and checks if a payload is encrypted if it has to be.
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*
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* @param this calling object
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* @param crypter crypter_t object
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* @param signer signer_t object
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* @return
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* - SUCCESS
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* - FAILED if decryption not successfull
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* - INVALID_STATE if no crypter/signer supplied but needed
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*/
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status_t (*decrypt_payloads) (private_message_t *this,crypter_t *crypter, signer_t* signer);
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/**
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* Verifies the message. Checks for payloads count.
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*
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* @param calling object
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* @return
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* - SUCCESS if message valid, or
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* - FAILED if message does not align with message rules.
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*/
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status_t (*verify) (private_message_t *this);
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};
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/**
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* Implementation of private_message_t.set_message_rule.
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*/
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static status_t set_message_rule(private_message_t *this)
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{
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int i;
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for (i = 0; i < (sizeof(message_rules) / sizeof(message_rule_t)); i++)
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{
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if ((this->exchange_type == message_rules[i].exchange_type) &&
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(this->is_request == message_rules[i].is_request))
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{
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/* found rule for given exchange_type*/
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this->message_rule = &(message_rules[i]);
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return SUCCESS;
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}
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}
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this->message_rule = NULL;
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return NOT_FOUND;
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}
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/**
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* Implementation of private_message_t.get_payload_rule.
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*/
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static status_t get_payload_rule(private_message_t *this, payload_type_t payload_type, payload_rule_t **payload_rule)
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{
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int i;
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for (i = 0; i < this->message_rule->payload_rule_count;i++)
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{
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if (this->message_rule->payload_rules[i].payload_type == payload_type)
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{
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*payload_rule = &(this->message_rule->payload_rules[i]);
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return SUCCESS;
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}
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}
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*payload_rule = NULL;
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return NOT_FOUND;
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}
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/**
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* Implementation of message_t.set_ike_sa_id.
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*/
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static void set_ike_sa_id (private_message_t *this,ike_sa_id_t *ike_sa_id)
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{
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this->ike_sa_id = ike_sa_id->clone(ike_sa_id);
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}
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/**
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* Implementation of message_t.get_ike_sa_id.
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*/
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static status_t get_ike_sa_id (private_message_t *this,ike_sa_id_t **ike_sa_id)
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{
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if (this->ike_sa_id == NULL)
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{
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return FAILED;
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}
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*ike_sa_id = this->ike_sa_id->clone(this->ike_sa_id);
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return SUCCESS;
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}
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/**
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* Implementation of message_t.set_message_id.
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*/
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static void set_message_id (private_message_t *this,u_int32_t message_id)
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{
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this->message_id = message_id;
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}
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/**
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* Implementation of message_t.get_message_id.
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*/
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static u_int32_t get_message_id (private_message_t *this)
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{
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return this->message_id;
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}
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/**
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* Implementation of message_t.get_responder_spi.
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*/
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static u_int64_t get_responder_spi (private_message_t *this)
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{
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return (this->ike_sa_id->get_responder_spi(this->ike_sa_id));
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}
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/**
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* Implementation of message_t.set_major_version.
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*/
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static void set_major_version (private_message_t *this,u_int8_t major_version)
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{
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this->major_version = major_version;
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}
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/**
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* Implementation of message_t.set_major_version.
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*/
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static u_int8_t get_major_version (private_message_t *this)
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{
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return this->major_version;
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}
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/**
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* Implementation of message_t.set_minor_version.
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*/
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static void set_minor_version (private_message_t *this,u_int8_t minor_version)
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{
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this->minor_version = minor_version;
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}
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/**
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* Implementation of message_t.get_minor_version.
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*/
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static u_int8_t get_minor_version (private_message_t *this)
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{
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return this->minor_version;
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}
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/**
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* Implementation of message_t.set_exchange_type.
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*/
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static void set_exchange_type (private_message_t *this,exchange_type_t exchange_type)
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{
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this->exchange_type = exchange_type;
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}
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/**
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* Implementation of message_t.get_exchange_type.
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*/
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static exchange_type_t get_exchange_type (private_message_t *this)
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{
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return this->exchange_type;
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}
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/**
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* Implementation of message_t.set_request.
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*/
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static void set_request (private_message_t *this,bool request)
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{
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this->is_request = request;
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}
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/**
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* Implementation of message_t.get_request.
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*/
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static exchange_type_t get_request (private_message_t *this)
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{
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return this->is_request;
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}
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/**
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* Implementation of message_t.add_payload.
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*/
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static void add_payload(private_message_t *this, payload_t *payload)
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{
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payload_t *last_payload;
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if (this->payloads->get_count(this->payloads) > 0)
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{
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this->payloads->get_last(this->payloads,(void **) &last_payload);
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last_payload->set_next_type(last_payload, payload->get_type(payload));
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}
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else
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{
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this->first_payload = payload->get_type(payload);
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}
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payload->set_next_type(payload, NO_PAYLOAD);
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this->payloads->insert_last(this->payloads, (void*)payload);
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this->logger->log(this->logger, CONTROL|LEVEL1, "Added payload of type %s to message",
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mapping_find(payload_type_m, payload->get_type(payload)));
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}
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/**
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* Implementation of message_t.set_source.
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*/
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static void set_source(private_message_t *this, host_t *host)
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{
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this->packet->set_source(this->packet, host);
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}
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/**
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* Implementation of message_t.set_destination.
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*/
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static void set_destination(private_message_t *this, host_t *host)
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{
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this->packet->set_destination(this->packet, host);
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}
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/**
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* Implementation of message_t.get_source.
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*/
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static host_t* get_source(private_message_t *this)
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{
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return this->packet->get_source(this->packet);
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}
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/**
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* Implementation of message_t.get_destination.
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*/
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static host_t * get_destination(private_message_t *this)
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{
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return this->packet->get_destination(this->packet);
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}
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/**
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* Implementation of message_t.get_destination.
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*/
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static iterator_t *get_payload_iterator(private_message_t *this)
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{
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return this->payloads->create_iterator(this->payloads, TRUE);
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}
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|
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/**
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* Implementation of message_t.generate.
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*/
|
|
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;
|
|
iterator_t *iterator;
|
|
status_t status;
|
|
chunk_t packet_data;
|
|
|
|
this->logger->log(this->logger, CONTROL, "Generating message of type %s, contains %d payloads",
|
|
mapping_find(exchange_type_m,this->exchange_type),
|
|
this->payloads->get_count(this->payloads));
|
|
|
|
if (this->exchange_type == EXCHANGE_TYPE_UNDEFINED)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Exchange type %s is not defined",
|
|
mapping_find(exchange_type_m,this->exchange_type));
|
|
return INVALID_STATE;
|
|
}
|
|
|
|
if (this->packet->get_source(this->packet) == NULL ||
|
|
this->packet->get_destination(this->packet) == NULL)
|
|
{
|
|
this->logger->log(this->logger, ERROR|LEVEL1, "%s not defined",
|
|
!this->packet->get_source(this->packet) ? "source" : "destination");
|
|
return INVALID_STATE;
|
|
}
|
|
|
|
/* set the rules for this messge */
|
|
status = this->set_message_rule(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "No message rules specified for a %s %s",
|
|
mapping_find(exchange_type_m,this->exchange_type),
|
|
this->is_request ? "request" : "response");
|
|
return NOT_SUPPORTED;
|
|
}
|
|
|
|
|
|
/* going to encrypt all content which have to be encrypted */
|
|
status = this->encrypt_payloads(this, crypter, signer);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Could not encrypt payloads");
|
|
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 doen later*/
|
|
iterator = this->payloads->create_iterator(this->payloads, TRUE);
|
|
while(iterator->has_next(iterator))
|
|
{
|
|
iterator->current(iterator, (void**)&next_payload);
|
|
payload->set_next_type(payload, next_payload->get_type(next_payload));
|
|
generator->generate_payload(generator, payload);
|
|
payload = next_payload;
|
|
}
|
|
iterator->destroy(iterator);
|
|
|
|
/* 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)
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL1, "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);
|
|
|
|
this->logger->log(this->logger, CONTROL, "Message of type %s generated successfully",
|
|
mapping_find(exchange_type_m,this->exchange_type));
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_packet.
|
|
*/
|
|
static packet_t *get_packet (private_message_t *this)
|
|
{
|
|
return this->packet->clone(this->packet);
|
|
}
|
|
|
|
/**
|
|
* Implementation of message_t.get_packet_data.
|
|
*/
|
|
static chunk_t get_packet_data (private_message_t *this)
|
|
{
|
|
return allocator_clone_chunk(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;
|
|
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL1, "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)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Header could not be parsed");
|
|
return status;
|
|
|
|
}
|
|
|
|
/* verify payload */
|
|
status = ike_header->payload_interface.verify(&(ike_header->payload_interface));
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "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));
|
|
|
|
this->logger->log(this->logger, CONTROL, "Parsed a %s %s",
|
|
mapping_find(exchange_type_m, this->exchange_type),
|
|
this->is_request ? "request" : "response");
|
|
|
|
ike_header->destroy(ike_header);
|
|
|
|
/* get the rules for this messge */
|
|
status = this->set_message_rule(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "No message rules specified for a %s %s",
|
|
mapping_find(exchange_type_m,this->exchange_type),
|
|
this->is_request ? "request" : "response");
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
current_payload_type = this->first_payload;
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL1, "Parsing body of message, first payload %s",
|
|
mapping_find(payload_type_m, current_payload_type));
|
|
|
|
/* parse payload for payload, while there are more available */
|
|
while ((current_payload_type != NO_PAYLOAD))
|
|
{
|
|
payload_t *current_payload;
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Start parsing payload of type %s",
|
|
mapping_find(payload_type_m, current_payload_type));
|
|
|
|
/* parse current payload */
|
|
status = this->parser->parse_payload(this->parser,current_payload_type,(payload_t **) ¤t_payload);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "Payload type %s could not be parsed",
|
|
mapping_find(payload_type_m,current_payload_type));
|
|
return status;
|
|
}
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Verify payload of type %s",
|
|
mapping_find(payload_type_m, current_payload_type));
|
|
|
|
/* verify it, stop parsig if its invalid */
|
|
status = current_payload->verify(current_payload);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "Payload type %s verification failed",
|
|
mapping_find(payload_type_m,current_payload_type));
|
|
current_payload->destroy(current_payload);
|
|
status = VERIFY_ERROR;
|
|
return status;
|
|
}
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Payload verified. Adding to payload list",
|
|
mapping_find(payload_type_m, 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)
|
|
{
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Payload of type encrypted found. Stop parsing",
|
|
mapping_find(payload_type_m, current_payload_type));
|
|
break;
|
|
}
|
|
|
|
/* get next payload type */
|
|
current_payload_type = current_payload->get_next_type(current_payload);
|
|
}
|
|
|
|
if (current_payload_type == ENCRYPTED)
|
|
status = this->decrypt_payloads(this,crypter,signer);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "Could not decrypt payloads");
|
|
return status;
|
|
}
|
|
|
|
status = this->verify(this);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR, "Verification of message failed");
|
|
}
|
|
|
|
this->logger->log(this->logger, CONTROL, "Message %s %s contains %d payloads",
|
|
mapping_find(exchange_type_m, this->exchange_type),
|
|
this->is_request ? "request" : "response",
|
|
this->payloads->get_count(this->payloads));
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Implementation of private_message_t.verify.
|
|
*/
|
|
static status_t verify(private_message_t *this)
|
|
{
|
|
int i;
|
|
iterator_t *iterator;
|
|
size_t total_found_payloads = 0;
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL1, "Verifying message structure");
|
|
|
|
iterator = this->payloads->create_iterator(this->payloads,TRUE);
|
|
/* check for payloads with wrong count*/
|
|
for (i = 0; i < this->message_rule->payload_rule_count;i++)
|
|
{
|
|
size_t found_payloads = 0;
|
|
|
|
/* check all payloads for specific rule */
|
|
iterator->reset(iterator);
|
|
|
|
while(iterator->has_next(iterator))
|
|
{
|
|
payload_t *current_payload;
|
|
payload_type_t current_payload_type;
|
|
|
|
iterator->current(iterator,(void **)¤t_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_t *unknown_payload = (unknown_payload_t*)current_payload;
|
|
if (unknown_payload->is_critical(unknown_payload))
|
|
{
|
|
this->logger->log(this->logger, ERROR|LEVEL1, "%s (%d) is not supported, but its critical!",
|
|
mapping_find(payload_type_m, current_payload_type), current_payload_type);
|
|
iterator->destroy(iterator);
|
|
return NOT_SUPPORTED;
|
|
}
|
|
}
|
|
else if (current_payload_type == this->message_rule->payload_rules[i].payload_type)
|
|
{
|
|
found_payloads++;
|
|
total_found_payloads++;
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Found payload of type %s",
|
|
mapping_find(payload_type_m, this->message_rule->payload_rules[i].payload_type));
|
|
|
|
/* as soon as ohe payload occures more then specified, the verification fails */
|
|
if (found_payloads > this->message_rule->payload_rules[i].max_occurence)
|
|
{
|
|
this->logger->log(this->logger, ERROR|LEVEL1, "Payload of type %s more than %d times (%d) occured in current message",
|
|
mapping_find(payload_type_m, current_payload_type),
|
|
this->message_rule->payload_rules[i].max_occurence, found_payloads);
|
|
iterator->destroy(iterator);
|
|
return FAILED;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (found_payloads < this->message_rule->payload_rules[i].min_occurence)
|
|
{
|
|
this->logger->log(this->logger, ERROR|LEVEL1, "Payload of type %s not occured %d times (%d)",
|
|
mapping_find(payload_type_m, this->message_rule->payload_rules[i].payload_type),
|
|
this->message_rule->payload_rules[i].min_occurence, found_payloads);
|
|
iterator->destroy(iterator);
|
|
return FAILED;
|
|
}
|
|
if ((this->message_rule->payload_rules[i].sufficient) && (this->payloads->get_count(this->payloads) == total_found_payloads))
|
|
{
|
|
iterator->destroy(iterator);
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
iterator->destroy(iterator);
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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;
|
|
status_t status;
|
|
|
|
iterator = this->payloads->create_iterator(this->payloads,TRUE);
|
|
|
|
/* process each payload and decrypt a encryption payload */
|
|
while(iterator->has_next(iterator))
|
|
{
|
|
payload_rule_t *payload_rule;
|
|
payload_type_t current_payload_type;
|
|
payload_t *current_payload;
|
|
|
|
/* get current payload */
|
|
iterator->current(iterator,(void **)¤t_payload);
|
|
|
|
/* needed to check */
|
|
current_payload_type = current_payload->get_type(current_payload);
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "Process payload of type %s",
|
|
mapping_find(payload_type_m,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;
|
|
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Found an encryption payload");
|
|
|
|
if (payload_number != this->payloads->get_count(this->payloads))
|
|
{
|
|
/* encrypted payload is not last one */
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Encrypted payload is not last payload");
|
|
iterator->destroy(iterator);
|
|
return FAILED;
|
|
}
|
|
/* decrypt */
|
|
encryption_payload->set_transforms(encryption_payload, crypter, signer);
|
|
this->logger->log(this->logger, CONTROL | LEVEL1, "Verify signature of encryption payload");
|
|
status = encryption_payload->verify_signature(encryption_payload, this->packet->get_data(this->packet));
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "encryption payload signature invalid");
|
|
iterator->destroy(iterator);
|
|
return status;
|
|
}
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Decrypt content of encryption payload");
|
|
status = encryption_payload->decrypt(encryption_payload);
|
|
if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Encrypted payload could not be decrypted and parsed: %s",
|
|
mapping_find(status_m, status));
|
|
iterator->destroy(iterator);
|
|
return status;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
this->logger->log(this->logger, CONTROL|LEVEL2, "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);
|
|
this->logger->log(this->logger, CONTROL | LEVEL1, "Insert unencrypted payload of type %s at end of list.",
|
|
mapping_find(payload_type_m,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)
|
|
{
|
|
/* get the ruleset for found payload */
|
|
status = this->get_payload_rule(this, current_payload_type, &payload_rule);
|
|
if (status != SUCCESS)
|
|
{
|
|
/* payload is not allowed */
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Payload type %s not allowed",mapping_find(payload_type_m,current_payload_type));
|
|
iterator->destroy(iterator);
|
|
return status;
|
|
}
|
|
|
|
/* 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 */
|
|
this->logger->log(this->logger, ERROR | LEVEL1, "Payload type %s should be %s!",
|
|
mapping_find(payload_type_m,current_payload_type),
|
|
(payload_rule->encrypted) ? "encrypted" : "not encrypted");
|
|
iterator->destroy(iterator);
|
|
return FAILED;
|
|
}
|
|
}
|
|
/* 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.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)
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL1, "Message doesn't have to be encrypted");
|
|
/* message contains no content to encrypt */
|
|
return SUCCESS;
|
|
}
|
|
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "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();
|
|
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "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);
|
|
this->logger->log(this->logger, CONTROL | LEVEL3, "Get rule for payload %s",
|
|
mapping_find(payload_type_m,current_payload->get_type(current_payload)));
|
|
|
|
status = this->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))
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Payload %s has to get encrypted",
|
|
mapping_find(payload_type_m,current_payload->get_type(current_payload)));
|
|
to_encrypt = TRUE;
|
|
}
|
|
else if (status != SUCCESS)
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Payload %s not defined for exchange type %s. Handle it anyway",
|
|
mapping_find(payload_type_m,current_payload->get_type(current_payload)),
|
|
mapping_find(exchange_type_m,this->exchange_type));
|
|
}
|
|
|
|
if (to_encrypt)
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Insert payload %s to encryption payload",
|
|
mapping_find(payload_type_m,current_payload->get_type(current_payload)));
|
|
|
|
encryption_payload->add_payload(encryption_payload,current_payload);
|
|
}
|
|
else
|
|
{
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Insert payload %s as payload wich does not have to be encrypted",
|
|
mapping_find(payload_type_m,current_payload->get_type(current_payload)));
|
|
this->public.add_payload(&(this->public), (payload_t*)encryption_payload);
|
|
}
|
|
}
|
|
|
|
status = SUCCESS;
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Set transforms for encryption payload ");
|
|
encryption_payload->set_transforms(encryption_payload,crypter,signer);
|
|
this->logger->log(this->logger, CONTROL | LEVEL1, "Encrypt all payloads of encrypted payload");
|
|
status = encryption_payload->encrypt(encryption_payload);
|
|
this->logger->log(this->logger, CONTROL | LEVEL2, "Add encrypted payload to payload list");
|
|
this->public.add_payload(&(this->public), (payload_t*)encryption_payload);
|
|
|
|
all_payloads->destroy(all_payloads);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/**
|
|
* Implementation of message_t.destroy.
|
|
*/
|
|
static void destroy (private_message_t *this)
|
|
{
|
|
iterator_t *iterator;
|
|
|
|
this->logger->log(this->logger, CONTROL|LEVEL3, "Going to destroy message_t object");
|
|
|
|
this->packet->destroy(this->packet);
|
|
|
|
if (this->ike_sa_id != NULL)
|
|
{
|
|
this->ike_sa_id->destroy(this->ike_sa_id);
|
|
}
|
|
|
|
iterator = this->payloads->create_iterator(this->payloads, TRUE);
|
|
while (iterator->has_next(iterator))
|
|
{
|
|
payload_t *payload;
|
|
iterator->current(iterator, (void**)&payload);
|
|
this->logger->log(this->logger, CONTROL|LEVEL3, "Destroying payload of type %s",
|
|
mapping_find(payload_type_m, payload->get_type(payload)));
|
|
payload->destroy(payload);
|
|
}
|
|
iterator->destroy(iterator);
|
|
this->payloads->destroy(this->payloads);
|
|
this->parser->destroy(this->parser);
|
|
charon->logger_manager->destroy_logger(charon->logger_manager, this->logger);
|
|
|
|
allocator_free(this);
|
|
}
|
|
|
|
/*
|
|
* Described in Header-File
|
|
*/
|
|
message_t *message_create_from_packet(packet_t *packet)
|
|
{
|
|
private_message_t *this = allocator_alloc_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_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 = (status_t(*)(message_t*, ike_sa_id_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.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.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.get_payload_iterator = (iterator_t * (*) (message_t *)) get_payload_iterator;
|
|
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 functions */
|
|
this->set_message_rule = set_message_rule;
|
|
this->get_payload_rule = get_payload_rule;
|
|
this->encrypt_payloads = encrypt_payloads;
|
|
this->decrypt_payloads = decrypt_payloads;
|
|
this->verify = verify;
|
|
|
|
/* 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));
|
|
|
|
this->logger = charon->logger_manager->create_logger(charon->logger_manager, MESSAGE, NULL);
|
|
|
|
return (&this->public);
|
|
}
|
|
|
|
/*
|
|
* Described in Header.
|
|
*/
|
|
message_t *message_create()
|
|
{
|
|
return message_create_from_packet(NULL);
|
|
}
|
|
|
|
/*
|
|
* Described in Header.
|
|
*/
|
|
message_t *message_create_notify_reply(host_t *source, host_t *destination, exchange_type_t exchange_type, bool original_initiator,ike_sa_id_t *ike_sa_id,notify_message_type_t notify_type)
|
|
{
|
|
message_t *message = message_create_from_packet(NULL);
|
|
notify_payload_t *payload;
|
|
|
|
message->set_source(message, source->clone(source));
|
|
message->set_destination(message, destination->clone(destination));
|
|
message->set_exchange_type(message, exchange_type);
|
|
message->set_request(message, FALSE);
|
|
message->set_message_id(message,0);
|
|
message->set_ike_sa_id(message, ike_sa_id);
|
|
|
|
payload = notify_payload_create_from_protocol_and_type(IKE,notify_type);
|
|
message->add_payload(message,(payload_t *) payload);
|
|
|
|
return message;
|
|
}
|