src/libcharon/encoding/payloads/notify_payload.c - manifest_repos/strongswan - Git at Google

 /*
  * Copyright (C) 2006-2018 Tobias Brunner
  * Copyright (C) 2005-2010 Martin Willi
  * Copyright (C) 2010 revosec AG
  * Copyright (C) 2006 Daniel Roethlisberger
  * Copyright (C) 2005 Jan Hutter
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
  */

 #include <stddef.h>

 #include "notify_payload.h"

 #include <daemon.h>
 #include <encoding/payloads/encodings.h>
 #include <crypto/hashers/hasher.h>

 ENUM_BEGIN(notify_type_names, UNSUPPORTED_CRITICAL_PAYLOAD, UNSUPPORTED_CRITICAL_PAYLOAD,
 	"UNSUPPORTED_CRITICAL_PAYLOAD");
 ENUM_NEXT(notify_type_names, INVALID_IKE_SPI, INVALID_MAJOR_VERSION, UNSUPPORTED_CRITICAL_PAYLOAD,
 	"INVALID_IKE_SPI",
 	"INVALID_MAJOR_VERSION");
 ENUM_NEXT(notify_type_names, INVALID_SYNTAX, INVALID_SYNTAX, INVALID_MAJOR_VERSION,
 	"INVALID_SYNTAX");
 ENUM_NEXT(notify_type_names, INVALID_MESSAGE_ID, INVALID_MESSAGE_ID, INVALID_SYNTAX,
 	"INVALID_MESSAGE_ID");
 ENUM_NEXT(notify_type_names, INVALID_SPI, INVALID_SPI, INVALID_MESSAGE_ID,
 	"INVALID_SPI");
 ENUM_NEXT(notify_type_names, ATTRIBUTES_NOT_SUPPORTED, NO_PROPOSAL_CHOSEN, INVALID_SPI,
 	"ATTRIBUTES_NOT_SUPPORTED",
 	"NO_PROPOSAL_CHOSEN");
 ENUM_NEXT(notify_type_names, PAYLOAD_MALFORMED, AUTHENTICATION_FAILED, NO_PROPOSAL_CHOSEN,
 	"PAYLOAD_MALFORMED",
 	"INVALID_KE_PAYLOAD",
 	"INVALID_ID_INFORMATION",
 	"INVALID_CERT_ENCODING",
 	"INVALID_CERTIFICATE",
 	"CERT_TYPE_UNSUPPORTED",
 	"INVALID_CERT_AUTHORITY",
 	"INVALID_HASH_INFORMATION",
 	"AUTHENTICATION_FAILED");
 ENUM_NEXT(notify_type_names, SINGLE_PAIR_REQUIRED, CHILD_SA_NOT_FOUND, AUTHENTICATION_FAILED,
 	"SINGLE_PAIR_REQUIRED",
 	"NO_ADDITIONAL_SAS",
 	"INTERNAL_ADDRESS_FAILURE",
 	"FAILED_CP_REQUIRED",
 	"TS_UNACCEPTABLE",
 	"INVALID_SELECTORS",
 	"UNACCEPTABLE_ADDRESSES",
 	"UNEXPECTED_NAT_DETECTED",
 	"USE_ASSIGNED_HoA",
 	"TEMPORARY_FAILURE",
 	"CHILD_SA_NOT_FOUND");
 ENUM_NEXT(notify_type_names, ME_CONNECT_FAILED, ME_CONNECT_FAILED, CHILD_SA_NOT_FOUND,
 	"ME_CONNECT_FAILED");
 ENUM_NEXT(notify_type_names, MS_NOTIFY_STATUS, MS_NOTIFY_STATUS, ME_CONNECT_FAILED,
 	"MS_NOTIFY_STATUS");
 ENUM_NEXT(notify_type_names, INITIAL_CONTACT, SIGNATURE_HASH_ALGORITHMS, MS_NOTIFY_STATUS,
 	"INITIAL_CONTACT",
 	"SET_WINDOW_SIZE",
 	"ADDITIONAL_TS_POSSIBLE",
 	"IPCOMP_SUPPORTED",
 	"NAT_DETECTION_SOURCE_IP",
 	"NAT_DETECTION_DESTINATION_IP",
 	"COOKIE",
 	"USE_TRANSPORT_MODE",
 	"HTTP_CERT_LOOKUP_SUPPORTED",
 	"REKEY_SA",
 	"ESP_TFC_PADDING_NOT_SUPPORTED",
 	"NON_FIRST_FRAGMENTS_ALSO",
 	"MOBIKE_SUPPORTED",
 	"ADDITIONAL_IP4_ADDRESS",
 	"ADDITIONAL_IP6_ADDRESS",
 	"NO_ADDITIONAL_ADDRESSES",
 	"UPDATE_SA_ADDRESSES",
 	"COOKIE2",
 	"NO_NATS_ALLOWED",
 	"AUTH_LIFETIME",
 	"MULTIPLE_AUTH_SUPPORTED",
 	"ANOTHER_AUTH_FOLLOWS",
 	"REDIRECT_SUPPORTED",
 	"REDIRECT",
 	"REDIRECTED_FROM",
 	"TICKET_LT_OPAQUE",
 	"TICKET_REQUEST",
 	"TICKET_ACK",
 	"TICKET_NACK",
 	"TICKET_OPAQUE",
 	"LINK_ID",
 	"USE_WESP_MODE",
 	"ROHC_SUPPORTED",
 	"EAP_ONLY_AUTHENTICATION",
 	"CHILDLESS_IKEV2_SUPPORTED",
 	"QUICK_CRASH_DETECTION",
 	"IKEV2_MESSAGE_ID_SYNC_SUPPORTED",
 	"IKEV2_REPLAY_COUNTER_SYNC_SUPPORTED",
 	"IKEV2_MESSAGE_ID_SYNC",
 	"IPSEC_REPLAY_COUNTER_SYNC",
 	"SECURE PASSWORD_METHOD",
 	"PSK_PERSIST",
 	"PSK_CONFIRM",
 	"ERX_SUPPORTED",
 	"IFOM_CAPABILITY",
 	"SENDER_REQUEST_ID",
 	"FRAGMENTATION_SUPPORTED",
 	"SIGNATURE_HASH_ALGORITHMS");
 ENUM_NEXT(notify_type_names, USE_PPK, NO_PPK_AUTH, SIGNATURE_HASH_ALGORITHMS,
 	"USE_PPK",
 	"PPK_IDENTITY",
 	"NO_PPK_AUTH");
 ENUM_NEXT(notify_type_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, NO_PPK_AUTH,
 	"INITIAL_CONTACT");
 ENUM_NEXT(notify_type_names, DPD_R_U_THERE, DPD_R_U_THERE_ACK, INITIAL_CONTACT_IKEV1,
 	"DPD_R_U_THERE",
 	"DPD_R_U_THERE_ACK");
 ENUM_NEXT(notify_type_names, UNITY_LOAD_BALANCE, UNITY_LOAD_BALANCE, DPD_R_U_THERE_ACK,
 	"UNITY_LOAD_BALANCE");
 ENUM_NEXT(notify_type_names, USE_BEET_MODE, USE_BEET_MODE, UNITY_LOAD_BALANCE,
 	"USE_BEET_MODE");
 ENUM_NEXT(notify_type_names, ME_MEDIATION, RADIUS_ATTRIBUTE, USE_BEET_MODE,
 	"ME_MEDIATION",
 	"ME_ENDPOINT",
 	"ME_CALLBACK",
 	"ME_CONNECTID",
 	"ME_CONNECTKEY",
 	"ME_CONNECTAUTH",
 	"ME_RESPONSE",
 	"RADIUS_ATTRIBUTE");
 ENUM_END(notify_type_names, RADIUS_ATTRIBUTE);


 ENUM_BEGIN(notify_type_short_names, UNSUPPORTED_CRITICAL_PAYLOAD, UNSUPPORTED_CRITICAL_PAYLOAD,
 	"CRIT");
 ENUM_NEXT(notify_type_short_names, INVALID_IKE_SPI, INVALID_MAJOR_VERSION, UNSUPPORTED_CRITICAL_PAYLOAD,
 	"INVAL_IKE_SPI",
 	"INVAL_MAJOR");
 ENUM_NEXT(notify_type_short_names, INVALID_SYNTAX, INVALID_SYNTAX, INVALID_MAJOR_VERSION,
 	"INVAL_SYN");
 ENUM_NEXT(notify_type_short_names, INVALID_MESSAGE_ID, INVALID_MESSAGE_ID, INVALID_SYNTAX,
 	"INVAL_MID");
 ENUM_NEXT(notify_type_short_names, INVALID_SPI, INVALID_SPI, INVALID_MESSAGE_ID,
 	"INVAL_SPI");
 ENUM_NEXT(notify_type_short_names, ATTRIBUTES_NOT_SUPPORTED, NO_PROPOSAL_CHOSEN, INVALID_SPI,
 	"ATTR_UNSUP",
 	"NO_PROP");
 ENUM_NEXT(notify_type_short_names, PAYLOAD_MALFORMED, AUTHENTICATION_FAILED, NO_PROPOSAL_CHOSEN,
 	"PLD_MAL",
 	"INVAL_KE",
 	"INVAL_ID",
 	"INVAL_CERTEN",
 	"INVAL_CERT",
 	"CERT_UNSUP",
 	"INVAL_CA",
 	"INVAL_HASH",
 	"AUTH_FAILED");
 ENUM_NEXT(notify_type_short_names, SINGLE_PAIR_REQUIRED, CHILD_SA_NOT_FOUND, AUTHENTICATION_FAILED,
 	"SINGLE_PAIR",
 	"NO_ADD_SAS",
 	"INT_ADDR_FAIL",
 	"FAIL_CP_REQ",
 	"TS_UNACCEPT",
 	"INVAL_SEL",
 	"UNACCEPT_ADDR",
 	"UNEXPECT_NAT",
 	"ASSIGNED_HoA",
 	"TEMP_FAIL",
 	"NO_CHILD_SA");
 ENUM_NEXT(notify_type_short_names, ME_CONNECT_FAILED, ME_CONNECT_FAILED, CHILD_SA_NOT_FOUND,
 	"ME_CONN_FAIL");
 ENUM_NEXT(notify_type_short_names, MS_NOTIFY_STATUS, MS_NOTIFY_STATUS, ME_CONNECT_FAILED,
 	"MS_STATUS");
 ENUM_NEXT(notify_type_short_names, INITIAL_CONTACT, SIGNATURE_HASH_ALGORITHMS, MS_NOTIFY_STATUS,
 	"INIT_CONTACT",
 	"SET_WINSIZE",
 	"ADD_TS_POSS",
 	"IPCOMP_SUP",
 	"NATD_S_IP",
 	"NATD_D_IP",
 	"COOKIE",
 	"USE_TRANSP",
 	"HTTP_CERT_LOOK",
 	"REKEY_SA",
 	"ESP_TFC_PAD_N",
 	"NON_FIRST_FRAG",
 	"MOBIKE_SUP",
 	"ADD_4_ADDR",
 	"ADD_6_ADDR",
 	"NO_ADD_ADDR",
 	"UPD_SA_ADDR",
 	"COOKIE2",
 	"NO_NATS",
 	"AUTH_LFT",
 	"MULT_AUTH",
 	"AUTH_FOLLOWS",
 	"REDIR_SUP",
 	"REDIR",
 	"REDIR_FROM",
 	"TKT_LT_OPAK",
 	"TKT_REQ",
 	"TKT_ACK",
 	"TKT_NACK",
 	"TKT_OPAK",
 	"LINK_ID",
 	"WESP_MODE",
 	"ROHC_SUP",
 	"EAP_ONLY",
 	"CHDLESS_SUP",
 	"CRASH_DET",
 	"MSG_ID_SYN_SUP",
 	"RPL_CTR_SYN_SUP",
 	"MSG_ID_SYN",
 	"RPL_CTR_SYN",
 	"SEC_PASSWD",
 	"PSK_PST",
 	"PSK_CFM",
 	"ERX_SUP",
 	"IFOM_CAP",
 	"SENDER_REQ_ID",
 	"FRAG_SUP",
 	"HASH_ALG");
 ENUM_NEXT(notify_type_short_names, USE_PPK, NO_PPK_AUTH, SIGNATURE_HASH_ALGORITHMS,
 	"USE_PPK",
 	"PPK_ID",
 	"NO_PPK");
 ENUM_NEXT(notify_type_short_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, NO_PPK_AUTH,
 	"INITIAL_CONTACT");
 ENUM_NEXT(notify_type_short_names, DPD_R_U_THERE, DPD_R_U_THERE_ACK, INITIAL_CONTACT_IKEV1,
 	"DPD",
 	"DPD_ACK");
 ENUM_NEXT(notify_type_short_names, UNITY_LOAD_BALANCE, UNITY_LOAD_BALANCE, DPD_R_U_THERE_ACK,
 	"UNITY_LB");
 ENUM_NEXT(notify_type_short_names, USE_BEET_MODE, USE_BEET_MODE, UNITY_LOAD_BALANCE,
 	"BEET_MODE");
 ENUM_NEXT(notify_type_short_names, ME_MEDIATION, RADIUS_ATTRIBUTE, USE_BEET_MODE,
 	"ME_MED",
 	"ME_EP",
 	"ME_CB",
 	"ME_CID",
 	"ME_CKEY",
 	"ME_CAUTH",
 	"ME_R",
 	"RADIUS");
 ENUM_END(notify_type_short_names, RADIUS_ATTRIBUTE);


 typedef struct private_notify_payload_t private_notify_payload_t;

 /**
  * Private data of an notify_payload_t object.
  */
 struct private_notify_payload_t {

 	/**
 	 * Public notify_payload_t interface.
 	 */
 	notify_payload_t public;

 	/**
 	 * Next payload type.
 	 */
 	uint8_t  next_payload;

 	/**
 	 * Critical flag.
 	 */
 	bool critical;

 	/**
 	 * reserved bits
 	 */
 	bool reserved[8];

 	/**
 	 * Length of this payload.
 	 */
 	uint16_t payload_length;

 	/**
 	 * Domain of interpretation, IKEv1 only.
 	 */
 	uint32_t doi;

 	/**
 	 * Protocol id.
 	 */
 	uint8_t protocol_id;

 	/**
 	 * Spi size.
 	 */
 	uint8_t spi_size;

 	/**
 	 * Notify message type.
 	 */
 	uint16_t notify_type;

 	/**
 	 * Security parameter index (spi).
 	 */
 	chunk_t spi;

 	/**
 	 * Notification data.
 	 */
 	chunk_t notify_data;

 	/**
 	 * Type of payload, PLV2_NOTIFY or PLV1_NOTIFY
 	 */
 	payload_type_t type;
 };

 /**
  * Encoding rules for an IKEv2 notification payload
  */
 static encoding_rule_t encodings_v2[] = {
 	/* 1 Byte next payload type, stored in the field next_payload */
 	{ U_INT_8,			offsetof(private_notify_payload_t, next_payload)	},
 	/* the critical bit */
 	{ FLAG,				offsetof(private_notify_payload_t, critical)		},
 	/* 7 Bit reserved bits, nowhere stored */
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[0])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[1])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[2])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[3])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[4])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[5])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[6])		},
 	/* Length of the whole payload*/
 	{ PAYLOAD_LENGTH,	offsetof(private_notify_payload_t, payload_length)	},
 	/* Protocol ID as 8 bit field*/
 	{ U_INT_8,			offsetof(private_notify_payload_t, protocol_id)		},
 	/* SPI Size as 8 bit field*/
 	{ SPI_SIZE,			offsetof(private_notify_payload_t, spi_size)		},
 	/* Notify message type as 16 bit field*/
 	{ U_INT_16,			offsetof(private_notify_payload_t, notify_type)		},
 	/* SPI as variable length field*/
 	{ SPI,				offsetof(private_notify_payload_t, spi)				},
 	/* Key Exchange Data is from variable size */
 	{ CHUNK_DATA,		offsetof(private_notify_payload_t, notify_data)		},
 };

 /*
                            1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       ! Next Payload  !C!  RESERVED   !         Payload Length        !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !  Protocol ID  !   SPI Size    !      Notify Message Type      !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !                                                               !
       ~                Security Parameter Index (SPI)                 ~
       !                                                               !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !                                                               !
       ~                       Notification Data                       ~
       !                                                               !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */
 /**
  * Encoding rules for an IKEv1 notification payload
  */
 static encoding_rule_t encodings_v1[] = {
 	/* 1 Byte next payload type, stored in the field next_payload */
 	{ U_INT_8,			offsetof(private_notify_payload_t, next_payload)	},
 	/* 8 reserved bits */
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[0])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[1])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[2])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[3])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[4])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[5])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[6])		},
 	{ RESERVED_BIT,		offsetof(private_notify_payload_t, reserved[7])		},
 	/* Length of the whole payload*/
 	{ PAYLOAD_LENGTH,	offsetof(private_notify_payload_t, payload_length)	},
 	/* DOI as  32 bit field*/
 	{ U_INT_32,			offsetof(private_notify_payload_t, doi)				},
 	/* Protocol ID as 8 bit field*/
 	{ U_INT_8,			offsetof(private_notify_payload_t, protocol_id)		},
 	/* SPI Size as 8 bit field*/
 	{ SPI_SIZE,			offsetof(private_notify_payload_t, spi_size)		},
 	/* Notify message type as 16 bit field*/
 	{ U_INT_16,			offsetof(private_notify_payload_t, notify_type)		},
 	/* SPI as variable length field*/
 	{ SPI,				offsetof(private_notify_payload_t, spi)				},
 	/* Key Exchange Data is from variable size */
 	{ CHUNK_DATA,		offsetof(private_notify_payload_t, notify_data)		},
 };

 /*
                            1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       ! Next Payload  !    RESERVED   !         Payload Length        !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !                             DOI                               !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !  Protocol ID  !   SPI Size    !      Notify Message Type      !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !                                                               !
       ~                Security Parameter Index (SPI)                 ~
       !                                                               !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       !                                                               !
       ~                       Notification Data                       ~
       !                                                               !
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */


 METHOD(payload_t, verify, status_t,
 	private_notify_payload_t *this)
 {
 	bool bad_length = FALSE;

 	switch (this->protocol_id)
 	{
 		case PROTO_NONE:
 		case PROTO_IKE:
 		case PROTO_AH:
 		case PROTO_ESP:
 			break;
 		default:
 			DBG1(DBG_ENC, "Unknown protocol (%d)", this->protocol_id);
 			return FAILED;
 	}

 	switch (this->notify_type)
 	{
 		case INVALID_KE_PAYLOAD:
 		{
 			if (this->type == PLV2_NOTIFY && this->notify_data.len != 2)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case NAT_DETECTION_SOURCE_IP:
 		case NAT_DETECTION_DESTINATION_IP:
 		case ME_CONNECTAUTH:
 		{
 			if (this->notify_data.len != HASH_SIZE_SHA1)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case INVALID_SYNTAX:
 		case INVALID_MAJOR_VERSION:
 		case NO_PROPOSAL_CHOSEN:
 		{
 			if (this->type == PLV2_NOTIFY && this->notify_data.len != 0)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case COOKIE:
 		{
 			if (this->notify_data.len < 1 || this->notify_data.len > 64)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case ADDITIONAL_IP4_ADDRESS:
 		{
 			if (this->notify_data.len != 4)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case ADDITIONAL_IP6_ADDRESS:
 		{
 			if (this->notify_data.len != 16)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case SIGNATURE_HASH_ALGORITHMS:
 		{
 			if (this->notify_data.len % 2)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case AUTH_LIFETIME:
 		{
 			if (this->notify_data.len != 4)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case IPCOMP_SUPPORTED:
 		{
 			if (this->notify_data.len != 3)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		}
 		case ME_ENDPOINT:
 			if (this->notify_data.len != 8 &&
 				this->notify_data.len != 12 &&
 				this->notify_data.len != 24)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		case ME_CONNECTID:
 			if (this->notify_data.len < 4 ||
 				this->notify_data.len > 16)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		case ME_CONNECTKEY:
 			if (this->notify_data.len < 16 ||
 				this->notify_data.len > 32)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		case DPD_R_U_THERE:
 		case DPD_R_U_THERE_ACK:
 			if (this->notify_data.len != 4)
 			{
 				bad_length = TRUE;
 			}
 			break;
 		default:
 			/* TODO: verify */
 			break;
 	}
 	if (bad_length)
 	{
 		DBG1(DBG_ENC, "invalid notify data length for %N (%d)",
 			 notify_type_names, this->notify_type,
 			 this->notify_data.len);
 		return FAILED;
 	}
 	return SUCCESS;
 }

 METHOD(payload_t, get_encoding_rules, int,
 	private_notify_payload_t *this, encoding_rule_t **rules)
 {
 	if (this->type == PLV2_NOTIFY)
 	{
 		*rules = encodings_v2;
 		return countof(encodings_v2);
 	}
 	*rules = encodings_v1;
 	return countof(encodings_v1);
 }

 METHOD(payload_t, get_header_length, int,
 	private_notify_payload_t *this)
 {
 	if (this->type == PLV2_NOTIFY)
 	{
 		return 8 + this->spi_size;
 	}
 	return 12 + this->spi_size;
 }

 METHOD(payload_t, get_type, payload_type_t,
 	private_notify_payload_t *this)
 {
 	return this->type;
 }

 METHOD(payload_t, get_next_type, payload_type_t,
 	private_notify_payload_t *this)
 {
 	return this->next_payload;
 }

 METHOD(payload_t, set_next_type, void,
 	private_notify_payload_t *this, payload_type_t type)
 {
 	this->next_payload = type;
 }

 /**
  * recompute the payloads length.
  */
 static void compute_length(private_notify_payload_t *this)
 {
 	this->payload_length = get_header_length(this) + this->notify_data.len;
 }

 METHOD(payload_t, get_length, size_t,
 	private_notify_payload_t *this)
 {
 	return this->payload_length;
 }

 METHOD(notify_payload_t, get_protocol_id, uint8_t,
 	private_notify_payload_t *this)
 {
 	return this->protocol_id;
 }

 METHOD(notify_payload_t, set_protocol_id, void,
 	private_notify_payload_t *this, uint8_t protocol_id)
 {
 	this->protocol_id = protocol_id;
 }

 METHOD(notify_payload_t, get_notify_type, notify_type_t,
 	private_notify_payload_t *this)
 {
 	return this->notify_type;
 }

 METHOD(notify_payload_t, set_notify_type, void,
 	private_notify_payload_t *this, notify_type_t notify_type)
 {
 	this->notify_type = notify_type;
 }

 METHOD(notify_payload_t, get_spi, uint32_t,
 	private_notify_payload_t *this)
 {
 	switch (this->protocol_id)
 	{
 		case PROTO_AH:
 		case PROTO_ESP:
 			if (this->spi.len == 4)
 			{
 				return *((uint32_t*)this->spi.ptr);
 			}
 		default:
 			break;
 	}
 	return 0;
 }

 METHOD(notify_payload_t, set_spi, void,
 	private_notify_payload_t *this, uint32_t spi)
 {
 	chunk_free(&this->spi);
 	switch (this->protocol_id)
 	{
 		case PROTO_AH:
 		case PROTO_ESP:
 			this->spi = chunk_alloc(4);
 			*((uint32_t*)this->spi.ptr) = spi;
 			break;
 		default:
 			break;
 	}
 	this->spi_size = this->spi.len;
 	compute_length(this);
 }

 METHOD(notify_payload_t, get_spi_data, chunk_t,
 	private_notify_payload_t *this)
 {
 	switch (this->protocol_id)
 	{
 		case PROTO_IKE:
 			if (this->spi.len == 16)
 			{
 				return this->spi;
 			}
 		default:
 			break;
 	}
 	return chunk_empty;
 }

 METHOD(notify_payload_t, set_spi_data, void,
 	private_notify_payload_t *this, chunk_t spi)
 {
 	chunk_free(&this->spi);
 	switch (this->protocol_id)
 	{
 		case PROTO_IKE:
 			this->spi = chunk_clone(spi);
 		default:
 			break;
 	}
 	this->spi_size = this->spi.len;
 	compute_length(this);
 }

 METHOD(notify_payload_t, get_notification_data, chunk_t,
 	private_notify_payload_t *this)
 {
 	return this->notify_data;
 }

 METHOD(notify_payload_t, set_notification_data, void,
 	private_notify_payload_t *this, chunk_t data)
 {
 	free(this->notify_data.ptr);
 	this->notify_data = chunk_clone(data);
 	compute_length(this);
 }

 METHOD2(payload_t, notify_payload_t, destroy, void,
 	private_notify_payload_t *this)
 {
 	free(this->notify_data.ptr);
 	free(this->spi.ptr);
 	free(this);
 }

 /*
  * Described in header
  */
 notify_payload_t *notify_payload_create(payload_type_t type)
 {
 	private_notify_payload_t *this;

 	INIT(this,
 		.public = {
 			.payload_interface = {
 				.verify = _verify,
 				.get_encoding_rules = _get_encoding_rules,
 				.get_header_length = _get_header_length,
 				.get_length = _get_length,
 				.get_next_type = _get_next_type,
 				.set_next_type = _set_next_type,
 				.get_type = _get_type,
 				.destroy = _destroy,
 			},
 			.get_protocol_id = _get_protocol_id,
 			.set_protocol_id  = _set_protocol_id,
 			.get_notify_type = _get_notify_type,
 			.set_notify_type = _set_notify_type,
 			.get_spi = _get_spi,
 			.set_spi = _set_spi,
 			.get_spi_data = _get_spi_data,
 			.set_spi_data = _set_spi_data,
 			.get_notification_data = _get_notification_data,
 			.set_notification_data = _set_notification_data,
 			.destroy = _destroy,
 		},
 		.doi = IKEV1_DOI_IPSEC,
 		.next_payload = PL_NONE,
 		.type = type,
 	);
 	compute_length(this);
 	return &this->public;
 }

 /*
  * Described in header.
  */
 notify_payload_t *notify_payload_create_from_protocol_and_type(
 			payload_type_t type, protocol_id_t protocol, notify_type_t notify)
 {
 	notify_payload_t *this = notify_payload_create(type);

 	this->set_notify_type(this, notify);
 	this->set_protocol_id(this, protocol);

 	return this;
 }
	/*
	* Copyright (C) 2006-2018 Tobias Brunner
	* Copyright (C) 2005-2010 Martin Willi
	* Copyright (C) 2010 revosec AG
	* Copyright (C) 2006 Daniel Roethlisberger
	* Copyright (C) 2005 Jan Hutter
	* HSR Hochschule fuer Technik Rapperswil
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* for more details.
	*/

	#include <stddef.h>

	#include "notify_payload.h"

	#include <daemon.h>
	#include <encoding/payloads/encodings.h>
	#include <crypto/hashers/hasher.h>

	ENUM_BEGIN(notify_type_names, UNSUPPORTED_CRITICAL_PAYLOAD, UNSUPPORTED_CRITICAL_PAYLOAD,
	"UNSUPPORTED_CRITICAL_PAYLOAD");
	ENUM_NEXT(notify_type_names, INVALID_IKE_SPI, INVALID_MAJOR_VERSION, UNSUPPORTED_CRITICAL_PAYLOAD,
	"INVALID_IKE_SPI",
	"INVALID_MAJOR_VERSION");
	ENUM_NEXT(notify_type_names, INVALID_SYNTAX, INVALID_SYNTAX, INVALID_MAJOR_VERSION,
	"INVALID_SYNTAX");
	ENUM_NEXT(notify_type_names, INVALID_MESSAGE_ID, INVALID_MESSAGE_ID, INVALID_SYNTAX,
	"INVALID_MESSAGE_ID");
	ENUM_NEXT(notify_type_names, INVALID_SPI, INVALID_SPI, INVALID_MESSAGE_ID,
	"INVALID_SPI");
	ENUM_NEXT(notify_type_names, ATTRIBUTES_NOT_SUPPORTED, NO_PROPOSAL_CHOSEN, INVALID_SPI,
	"ATTRIBUTES_NOT_SUPPORTED",
	"NO_PROPOSAL_CHOSEN");
	ENUM_NEXT(notify_type_names, PAYLOAD_MALFORMED, AUTHENTICATION_FAILED, NO_PROPOSAL_CHOSEN,
	"PAYLOAD_MALFORMED",
	"INVALID_KE_PAYLOAD",
	"INVALID_ID_INFORMATION",
	"INVALID_CERT_ENCODING",
	"INVALID_CERTIFICATE",
	"CERT_TYPE_UNSUPPORTED",
	"INVALID_CERT_AUTHORITY",
	"INVALID_HASH_INFORMATION",
	"AUTHENTICATION_FAILED");
	ENUM_NEXT(notify_type_names, SINGLE_PAIR_REQUIRED, CHILD_SA_NOT_FOUND, AUTHENTICATION_FAILED,
	"SINGLE_PAIR_REQUIRED",
	"NO_ADDITIONAL_SAS",
	"INTERNAL_ADDRESS_FAILURE",
	"FAILED_CP_REQUIRED",
	"TS_UNACCEPTABLE",
	"INVALID_SELECTORS",
	"UNACCEPTABLE_ADDRESSES",
	"UNEXPECTED_NAT_DETECTED",
	"USE_ASSIGNED_HoA",
	"TEMPORARY_FAILURE",
	"CHILD_SA_NOT_FOUND");
	ENUM_NEXT(notify_type_names, ME_CONNECT_FAILED, ME_CONNECT_FAILED, CHILD_SA_NOT_FOUND,
	"ME_CONNECT_FAILED");
	ENUM_NEXT(notify_type_names, MS_NOTIFY_STATUS, MS_NOTIFY_STATUS, ME_CONNECT_FAILED,
	"MS_NOTIFY_STATUS");
	ENUM_NEXT(notify_type_names, INITIAL_CONTACT, SIGNATURE_HASH_ALGORITHMS, MS_NOTIFY_STATUS,
	"INITIAL_CONTACT",
	"SET_WINDOW_SIZE",
	"ADDITIONAL_TS_POSSIBLE",
	"IPCOMP_SUPPORTED",
	"NAT_DETECTION_SOURCE_IP",
	"NAT_DETECTION_DESTINATION_IP",
	"COOKIE",
	"USE_TRANSPORT_MODE",
	"HTTP_CERT_LOOKUP_SUPPORTED",
	"REKEY_SA",
	"ESP_TFC_PADDING_NOT_SUPPORTED",
	"NON_FIRST_FRAGMENTS_ALSO",
	"MOBIKE_SUPPORTED",
	"ADDITIONAL_IP4_ADDRESS",
	"ADDITIONAL_IP6_ADDRESS",
	"NO_ADDITIONAL_ADDRESSES",
	"UPDATE_SA_ADDRESSES",
	"COOKIE2",
	"NO_NATS_ALLOWED",
	"AUTH_LIFETIME",
	"MULTIPLE_AUTH_SUPPORTED",
	"ANOTHER_AUTH_FOLLOWS",
	"REDIRECT_SUPPORTED",
	"REDIRECT",
	"REDIRECTED_FROM",
	"TICKET_LT_OPAQUE",
	"TICKET_REQUEST",
	"TICKET_ACK",
	"TICKET_NACK",
	"TICKET_OPAQUE",
	"LINK_ID",
	"USE_WESP_MODE",
	"ROHC_SUPPORTED",
	"EAP_ONLY_AUTHENTICATION",
	"CHILDLESS_IKEV2_SUPPORTED",
	"QUICK_CRASH_DETECTION",
	"IKEV2_MESSAGE_ID_SYNC_SUPPORTED",
	"IKEV2_REPLAY_COUNTER_SYNC_SUPPORTED",
	"IKEV2_MESSAGE_ID_SYNC",
	"IPSEC_REPLAY_COUNTER_SYNC",
	"SECURE PASSWORD_METHOD",
	"PSK_PERSIST",
	"PSK_CONFIRM",
	"ERX_SUPPORTED",
	"IFOM_CAPABILITY",
	"SENDER_REQUEST_ID",
	"FRAGMENTATION_SUPPORTED",
	"SIGNATURE_HASH_ALGORITHMS");
	ENUM_NEXT(notify_type_names, USE_PPK, NO_PPK_AUTH, SIGNATURE_HASH_ALGORITHMS,
	"USE_PPK",
	"PPK_IDENTITY",
	"NO_PPK_AUTH");
	ENUM_NEXT(notify_type_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, NO_PPK_AUTH,
	"INITIAL_CONTACT");
	ENUM_NEXT(notify_type_names, DPD_R_U_THERE, DPD_R_U_THERE_ACK, INITIAL_CONTACT_IKEV1,
	"DPD_R_U_THERE",
	"DPD_R_U_THERE_ACK");
	ENUM_NEXT(notify_type_names, UNITY_LOAD_BALANCE, UNITY_LOAD_BALANCE, DPD_R_U_THERE_ACK,
	"UNITY_LOAD_BALANCE");
	ENUM_NEXT(notify_type_names, USE_BEET_MODE, USE_BEET_MODE, UNITY_LOAD_BALANCE,
	"USE_BEET_MODE");
	ENUM_NEXT(notify_type_names, ME_MEDIATION, RADIUS_ATTRIBUTE, USE_BEET_MODE,
	"ME_MEDIATION",
	"ME_ENDPOINT",
	"ME_CALLBACK",
	"ME_CONNECTID",
	"ME_CONNECTKEY",
	"ME_CONNECTAUTH",
	"ME_RESPONSE",
	"RADIUS_ATTRIBUTE");
	ENUM_END(notify_type_names, RADIUS_ATTRIBUTE);


	ENUM_BEGIN(notify_type_short_names, UNSUPPORTED_CRITICAL_PAYLOAD, UNSUPPORTED_CRITICAL_PAYLOAD,
	"CRIT");
	ENUM_NEXT(notify_type_short_names, INVALID_IKE_SPI, INVALID_MAJOR_VERSION, UNSUPPORTED_CRITICAL_PAYLOAD,
	"INVAL_IKE_SPI",
	"INVAL_MAJOR");
	ENUM_NEXT(notify_type_short_names, INVALID_SYNTAX, INVALID_SYNTAX, INVALID_MAJOR_VERSION,
	"INVAL_SYN");
	ENUM_NEXT(notify_type_short_names, INVALID_MESSAGE_ID, INVALID_MESSAGE_ID, INVALID_SYNTAX,
	"INVAL_MID");
	ENUM_NEXT(notify_type_short_names, INVALID_SPI, INVALID_SPI, INVALID_MESSAGE_ID,
	"INVAL_SPI");
	ENUM_NEXT(notify_type_short_names, ATTRIBUTES_NOT_SUPPORTED, NO_PROPOSAL_CHOSEN, INVALID_SPI,
	"ATTR_UNSUP",
	"NO_PROP");
	ENUM_NEXT(notify_type_short_names, PAYLOAD_MALFORMED, AUTHENTICATION_FAILED, NO_PROPOSAL_CHOSEN,
	"PLD_MAL",
	"INVAL_KE",
	"INVAL_ID",
	"INVAL_CERTEN",
	"INVAL_CERT",
	"CERT_UNSUP",
	"INVAL_CA",
	"INVAL_HASH",
	"AUTH_FAILED");
	ENUM_NEXT(notify_type_short_names, SINGLE_PAIR_REQUIRED, CHILD_SA_NOT_FOUND, AUTHENTICATION_FAILED,
	"SINGLE_PAIR",
	"NO_ADD_SAS",
	"INT_ADDR_FAIL",
	"FAIL_CP_REQ",
	"TS_UNACCEPT",
	"INVAL_SEL",
	"UNACCEPT_ADDR",
	"UNEXPECT_NAT",
	"ASSIGNED_HoA",
	"TEMP_FAIL",
	"NO_CHILD_SA");
	ENUM_NEXT(notify_type_short_names, ME_CONNECT_FAILED, ME_CONNECT_FAILED, CHILD_SA_NOT_FOUND,
	"ME_CONN_FAIL");
	ENUM_NEXT(notify_type_short_names, MS_NOTIFY_STATUS, MS_NOTIFY_STATUS, ME_CONNECT_FAILED,
	"MS_STATUS");
	ENUM_NEXT(notify_type_short_names, INITIAL_CONTACT, SIGNATURE_HASH_ALGORITHMS, MS_NOTIFY_STATUS,
	"INIT_CONTACT",
	"SET_WINSIZE",
	"ADD_TS_POSS",
	"IPCOMP_SUP",
	"NATD_S_IP",
	"NATD_D_IP",
	"COOKIE",
	"USE_TRANSP",
	"HTTP_CERT_LOOK",
	"REKEY_SA",
	"ESP_TFC_PAD_N",
	"NON_FIRST_FRAG",
	"MOBIKE_SUP",
	"ADD_4_ADDR",
	"ADD_6_ADDR",
	"NO_ADD_ADDR",
	"UPD_SA_ADDR",
	"COOKIE2",
	"NO_NATS",
	"AUTH_LFT",
	"MULT_AUTH",
	"AUTH_FOLLOWS",
	"REDIR_SUP",
	"REDIR",
	"REDIR_FROM",
	"TKT_LT_OPAK",
	"TKT_REQ",
	"TKT_ACK",
	"TKT_NACK",
	"TKT_OPAK",
	"LINK_ID",
	"WESP_MODE",
	"ROHC_SUP",
	"EAP_ONLY",
	"CHDLESS_SUP",
	"CRASH_DET",
	"MSG_ID_SYN_SUP",
	"RPL_CTR_SYN_SUP",
	"MSG_ID_SYN",
	"RPL_CTR_SYN",
	"SEC_PASSWD",
	"PSK_PST",
	"PSK_CFM",
	"ERX_SUP",
	"IFOM_CAP",
	"SENDER_REQ_ID",
	"FRAG_SUP",
	"HASH_ALG");
	ENUM_NEXT(notify_type_short_names, USE_PPK, NO_PPK_AUTH, SIGNATURE_HASH_ALGORITHMS,
	"USE_PPK",
	"PPK_ID",
	"NO_PPK");
	ENUM_NEXT(notify_type_short_names, INITIAL_CONTACT_IKEV1, INITIAL_CONTACT_IKEV1, NO_PPK_AUTH,
	"INITIAL_CONTACT");
	ENUM_NEXT(notify_type_short_names, DPD_R_U_THERE, DPD_R_U_THERE_ACK, INITIAL_CONTACT_IKEV1,
	"DPD",
	"DPD_ACK");
	ENUM_NEXT(notify_type_short_names, UNITY_LOAD_BALANCE, UNITY_LOAD_BALANCE, DPD_R_U_THERE_ACK,
	"UNITY_LB");
	ENUM_NEXT(notify_type_short_names, USE_BEET_MODE, USE_BEET_MODE, UNITY_LOAD_BALANCE,
	"BEET_MODE");
	ENUM_NEXT(notify_type_short_names, ME_MEDIATION, RADIUS_ATTRIBUTE, USE_BEET_MODE,
	"ME_MED",
	"ME_EP",
	"ME_CB",
	"ME_CID",
	"ME_CKEY",
	"ME_CAUTH",
	"ME_R",
	"RADIUS");
	ENUM_END(notify_type_short_names, RADIUS_ATTRIBUTE);


	typedef struct private_notify_payload_t private_notify_payload_t;

	/**
	* Private data of an notify_payload_t object.
	*/
	struct private_notify_payload_t {

	/**
	* Public notify_payload_t interface.
	*/
	notify_payload_t public;

	/**
	* Next payload type.
	*/
	uint8_t next_payload;

	/**
	* Critical flag.
	*/
	bool critical;

	/**
	* reserved bits
	*/
	bool reserved[8];

	/**
	* Length of this payload.
	*/
	uint16_t payload_length;

	/**
	* Domain of interpretation, IKEv1 only.
	*/
	uint32_t doi;

	/**
	* Protocol id.
	*/
	uint8_t protocol_id;

	/**
	* Spi size.
	*/
	uint8_t spi_size;

	/**
	* Notify message type.
	*/
	uint16_t notify_type;

	/**
	* Security parameter index (spi).
	*/
	chunk_t spi;

	/**
	* Notification data.
	*/
	chunk_t notify_data;

	/**
	* Type of payload, PLV2_NOTIFY or PLV1_NOTIFY
	*/
	payload_type_t type;
	};

	/**
	* Encoding rules for an IKEv2 notification payload
	*/
	static encoding_rule_t encodings_v2[] = {
	/* 1 Byte next payload type, stored in the field next_payload */
	{ U_INT_8, offsetof(private_notify_payload_t, next_payload) },
	/* the critical bit */
	{ FLAG, offsetof(private_notify_payload_t, critical) },
	/* 7 Bit reserved bits, nowhere stored */
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[0]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[1]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[2]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[3]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[4]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[5]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[6]) },
	/* Length of the whole payload*/
	{ PAYLOAD_LENGTH, offsetof(private_notify_payload_t, payload_length) },
	/* Protocol ID as 8 bit field*/
	{ U_INT_8, offsetof(private_notify_payload_t, protocol_id) },
	/* SPI Size as 8 bit field*/
	{ SPI_SIZE, offsetof(private_notify_payload_t, spi_size) },
	/* Notify message type as 16 bit field*/
	{ U_INT_16, offsetof(private_notify_payload_t, notify_type) },
	/* SPI as variable length field*/
	{ SPI, offsetof(private_notify_payload_t, spi) },
	/* Key Exchange Data is from variable size */
	{ CHUNK_DATA, offsetof(private_notify_payload_t, notify_data) },
	};

	/*
	1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! Next Payload !C! RESERVED ! Payload Length !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! Protocol ID ! SPI Size ! Notify Message Type !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! !
	~ Security Parameter Index (SPI) ~
	! !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! !
	~ Notification Data ~
	! !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	*/
	/**
	* Encoding rules for an IKEv1 notification payload
	*/
	static encoding_rule_t encodings_v1[] = {
	/* 1 Byte next payload type, stored in the field next_payload */
	{ U_INT_8, offsetof(private_notify_payload_t, next_payload) },
	/* 8 reserved bits */
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[0]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[1]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[2]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[3]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[4]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[5]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[6]) },
	{ RESERVED_BIT, offsetof(private_notify_payload_t, reserved[7]) },
	/* Length of the whole payload*/
	{ PAYLOAD_LENGTH, offsetof(private_notify_payload_t, payload_length) },
	/* DOI as 32 bit field*/
	{ U_INT_32, offsetof(private_notify_payload_t, doi) },
	/* Protocol ID as 8 bit field*/
	{ U_INT_8, offsetof(private_notify_payload_t, protocol_id) },
	/* SPI Size as 8 bit field*/
	{ SPI_SIZE, offsetof(private_notify_payload_t, spi_size) },
	/* Notify message type as 16 bit field*/
	{ U_INT_16, offsetof(private_notify_payload_t, notify_type) },
	/* SPI as variable length field*/
	{ SPI, offsetof(private_notify_payload_t, spi) },
	/* Key Exchange Data is from variable size */
	{ CHUNK_DATA, offsetof(private_notify_payload_t, notify_data) },
	};

	/*
	1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! Next Payload ! RESERVED ! Payload Length !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! DOI !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! Protocol ID ! SPI Size ! Notify Message Type !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! !
	~ Security Parameter Index (SPI) ~
	! !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	! !
	~ Notification Data ~
	! !
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	*/


	METHOD(payload_t, verify, status_t,
	private_notify_payload_t *this)
	{
	bool bad_length = FALSE;

	switch (this->protocol_id)
	{
	case PROTO_NONE:
	case PROTO_IKE:
	case PROTO_AH:
	case PROTO_ESP:
	break;
	default:
	DBG1(DBG_ENC, "Unknown protocol (%d)", this->protocol_id);
	return FAILED;
	}

	switch (this->notify_type)
	{
	case INVALID_KE_PAYLOAD:
	{
	if (this->type == PLV2_NOTIFY && this->notify_data.len != 2)
	{
	bad_length = TRUE;
	}
	break;
	}
	case NAT_DETECTION_SOURCE_IP:
	case NAT_DETECTION_DESTINATION_IP:
	case ME_CONNECTAUTH:
	{
	if (this->notify_data.len != HASH_SIZE_SHA1)
	{
	bad_length = TRUE;
	}
	break;
	}
	case INVALID_SYNTAX:
	case INVALID_MAJOR_VERSION:
	case NO_PROPOSAL_CHOSEN:
	{
	if (this->type == PLV2_NOTIFY && this->notify_data.len != 0)
	{
	bad_length = TRUE;
	}
	break;
	}
	case COOKIE:
	{
	if (this->notify_data.len < 1 \|\| this->notify_data.len > 64)
	{
	bad_length = TRUE;
	}
	break;
	}
	case ADDITIONAL_IP4_ADDRESS:
	{
	if (this->notify_data.len != 4)
	{
	bad_length = TRUE;
	}
	break;
	}
	case ADDITIONAL_IP6_ADDRESS:
	{
	if (this->notify_data.len != 16)
	{
	bad_length = TRUE;
	}
	break;
	}
	case SIGNATURE_HASH_ALGORITHMS:
	{
	if (this->notify_data.len % 2)
	{
	bad_length = TRUE;
	}
	break;
	}
	case AUTH_LIFETIME:
	{
	if (this->notify_data.len != 4)
	{
	bad_length = TRUE;
	}
	break;
	}
	case IPCOMP_SUPPORTED:
	{
	if (this->notify_data.len != 3)
	{
	bad_length = TRUE;
	}
	break;
	}
	case ME_ENDPOINT:
	if (this->notify_data.len != 8 &&
	this->notify_data.len != 12 &&
	this->notify_data.len != 24)
	{
	bad_length = TRUE;
	}
	break;
	case ME_CONNECTID:
	if (this->notify_data.len < 4 \|\|
	this->notify_data.len > 16)
	{
	bad_length = TRUE;
	}
	break;
	case ME_CONNECTKEY:
	if (this->notify_data.len < 16 \|\|
	this->notify_data.len > 32)
	{
	bad_length = TRUE;
	}
	break;
	case DPD_R_U_THERE:
	case DPD_R_U_THERE_ACK:
	if (this->notify_data.len != 4)
	{
	bad_length = TRUE;
	}
	break;
	default:
	/* TODO: verify */
	break;
	}
	if (bad_length)
	{
	DBG1(DBG_ENC, "invalid notify data length for %N (%d)",
	notify_type_names, this->notify_type,
	this->notify_data.len);
	return FAILED;
	}
	return SUCCESS;
	}

	METHOD(payload_t, get_encoding_rules, int,
	private_notify_payload_t this, encoding_rule_t *rules)
	{
	if (this->type == PLV2_NOTIFY)
	{
	*rules = encodings_v2;
	return countof(encodings_v2);
	}
	*rules = encodings_v1;
	return countof(encodings_v1);
	}

	METHOD(payload_t, get_header_length, int,
	private_notify_payload_t *this)
	{
	if (this->type == PLV2_NOTIFY)
	{
	return 8 + this->spi_size;
	}
	return 12 + this->spi_size;
	}

	METHOD(payload_t, get_type, payload_type_t,
	private_notify_payload_t *this)
	{
	return this->type;
	}

	METHOD(payload_t, get_next_type, payload_type_t,
	private_notify_payload_t *this)
	{
	return this->next_payload;
	}

	METHOD(payload_t, set_next_type, void,
	private_notify_payload_t *this, payload_type_t type)
	{
	this->next_payload = type;
	}

	/**
	* recompute the payloads length.
	*/
	static void compute_length(private_notify_payload_t *this)
	{
	this->payload_length = get_header_length(this) + this->notify_data.len;
	}

	METHOD(payload_t, get_length, size_t,
	private_notify_payload_t *this)
	{
	return this->payload_length;
	}

	METHOD(notify_payload_t, get_protocol_id, uint8_t,
	private_notify_payload_t *this)
	{
	return this->protocol_id;
	}

	METHOD(notify_payload_t, set_protocol_id, void,
	private_notify_payload_t *this, uint8_t protocol_id)
	{
	this->protocol_id = protocol_id;
	}

	METHOD(notify_payload_t, get_notify_type, notify_type_t,
	private_notify_payload_t *this)
	{
	return this->notify_type;
	}

	METHOD(notify_payload_t, set_notify_type, void,
	private_notify_payload_t *this, notify_type_t notify_type)
	{
	this->notify_type = notify_type;
	}

	METHOD(notify_payload_t, get_spi, uint32_t,
	private_notify_payload_t *this)
	{
	switch (this->protocol_id)
	{
	case PROTO_AH:
	case PROTO_ESP:
	if (this->spi.len == 4)
	{
	return ((uint32_t)this->spi.ptr);
	}
	default:
	break;
	}
	return 0;
	}

	METHOD(notify_payload_t, set_spi, void,
	private_notify_payload_t *this, uint32_t spi)
	{
	chunk_free(&this->spi);
	switch (this->protocol_id)
	{
	case PROTO_AH:
	case PROTO_ESP:
	this->spi = chunk_alloc(4);
	((uint32_t)this->spi.ptr) = spi;
	break;
	default:
	break;
	}
	this->spi_size = this->spi.len;
	compute_length(this);
	}

	METHOD(notify_payload_t, get_spi_data, chunk_t,
	private_notify_payload_t *this)
	{
	switch (this->protocol_id)
	{
	case PROTO_IKE:
	if (this->spi.len == 16)
	{
	return this->spi;
	}
	default:
	break;
	}
	return chunk_empty;
	}

	METHOD(notify_payload_t, set_spi_data, void,
	private_notify_payload_t *this, chunk_t spi)
	{
	chunk_free(&this->spi);
	switch (this->protocol_id)
	{
	case PROTO_IKE:
	this->spi = chunk_clone(spi);
	default:
	break;
	}
	this->spi_size = this->spi.len;
	compute_length(this);
	}

	METHOD(notify_payload_t, get_notification_data, chunk_t,
	private_notify_payload_t *this)
	{
	return this->notify_data;
	}

	METHOD(notify_payload_t, set_notification_data, void,
	private_notify_payload_t *this, chunk_t data)
	{
	free(this->notify_data.ptr);
	this->notify_data = chunk_clone(data);
	compute_length(this);
	}

	METHOD2(payload_t, notify_payload_t, destroy, void,
	private_notify_payload_t *this)
	{
	free(this->notify_data.ptr);
	free(this->spi.ptr);
	free(this);
	}

	/*
	* Described in header
	*/
	notify_payload_t *notify_payload_create(payload_type_t type)
	{
	private_notify_payload_t *this;

	INIT(this,
	.public = {
	.payload_interface = {
	.verify = _verify,
	.get_encoding_rules = _get_encoding_rules,
	.get_header_length = _get_header_length,
	.get_length = _get_length,
	.get_next_type = _get_next_type,
	.set_next_type = _set_next_type,
	.get_type = _get_type,
	.destroy = _destroy,
	},
	.get_protocol_id = _get_protocol_id,
	.set_protocol_id = _set_protocol_id,
	.get_notify_type = _get_notify_type,
	.set_notify_type = _set_notify_type,
	.get_spi = _get_spi,
	.set_spi = _set_spi,
	.get_spi_data = _get_spi_data,
	.set_spi_data = _set_spi_data,
	.get_notification_data = _get_notification_data,
	.set_notification_data = _set_notification_data,
	.destroy = _destroy,
	},
	.doi = IKEV1_DOI_IPSEC,
	.next_payload = PL_NONE,
	.type = type,
	);
	compute_length(this);
	return &this->public;
	}

	/*
	* Described in header.
	*/
	notify_payload_t *notify_payload_create_from_protocol_and_type(
	payload_type_t type, protocol_id_t protocol, notify_type_t notify)
	{
	notify_payload_t *this = notify_payload_create(type);

	this->set_notify_type(this, notify);
	this->set_protocol_id(this, protocol);

	return this;
	}