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	1	/*
	2	* Copyright (c) 2008-2013 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/* $FreeBSD: src/sys/netinet6/esp.h,v 1.2.2.2 2001/07/03 11:01:49 ume Exp $ */
	30	/* $KAME: esp.h,v 1.16 2000/10/18 21:28:00 itojun Exp $ */
	31
	32	/*
	33	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	34	* All rights reserved.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	* 1. Redistributions of source code must retain the above copyright
	40	* notice, this list of conditions and the following disclaimer.
	41	* 2. Redistributions in binary form must reproduce the above copyright
	42	* notice, this list of conditions and the following disclaimer in the
	43	* documentation and/or other materials provided with the distribution.
	44	* 3. Neither the name of the project nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*/
	60
	61	/*
	62	* RFC1827/2406 Encapsulated Security Payload.
	63	*/
	64
	65	#ifndef _NETINET6_ESP_H_
	66	#define _NETINET6_ESP_H_
	67	#include <sys/appleapiopts.h>
	68
	69
	70	struct esp {
	71	u_int32_t esp_spi; /* ESP */
	72	/variable size, 32bit bound/ /* Initialization Vector */
	73	/variable size/ /* Payload data */
	74	/variable size/ /* padding */
	75	/8bit/ /* pad size */
	76	/8bit/ /* next header */
	77	/8bit/ /* next header */
	78	/variable size, 32bit bound/ /* Authentication data (new IPsec) */
	79	};
	80
	81	struct newesp {
	82	u_int32_t esp_spi; /* ESP */
	83	u_int32_t esp_seq; /* Sequence number */
	84	/variable size/ /* (IV and) Payload data */
	85	/variable size/ /* padding */
	86	/8bit/ /* pad size */
	87	/8bit/ /* next header */
	88	/8bit/ /* next header */
	89	/variable size, 32bit bound/ /* Authentication data */
	90	};
	91
	92	struct esptail {
	93	u_int8_t esp_padlen; /* pad length */
	94	u_int8_t esp_nxt; /* Next header */
	95	/variable size, 32bit bound/ /* Authentication data (new IPsec)*/
	96	};
	97
	98	#ifdef BSD_KERNEL_PRIVATE
	99	struct secasvar;
	100
	101	struct esp_algorithm {
	102	size_t padbound; /* pad boundary, in byte */
	103	int ivlenval; /* iv length, in byte */
	104	int (mature)(struct secasvar );
	105	int keymin; /* in bits */
	106	int keymax; /* in bits */
	107	int (schedlen)(const struct esp_algorithm );
	108	const char *name;
	109	int (ivlen)(const struct esp_algorithm , struct secasvar *);
	110	int (decrypt)(struct mbuf , size_t,
	111	struct secasvar , const struct esp_algorithm , int);
	112	int (encrypt)(struct mbuf , size_t, size_t,
	113	struct secasvar , const struct esp_algorithm , int);
	114	/* not supposed to be called directly */
	115	int (schedule)(const struct esp_algorithm , struct secasvar *);
	116	int (blockdecrypt)(const struct esp_algorithm ,
	117	struct secasvar , u_int8_t , u_int8_t *);
	118	int (blockencrypt)(const struct esp_algorithm ,
	119	struct secasvar , u_int8_t , u_int8_t *);
	120	/* For Authenticated Encryption Methods */
	121	size_t icvlen;
	122	int (finalizedecrypt)(struct secasvar , u_int8_t *, uint);
	123	int (finalizeencrypt)(struct secasvar , u_int8_t *, uint);
	124	};
	125
	126	extern const struct esp_algorithm *esp_algorithm_lookup(int);
	127	extern int esp_max_ivlen(void);
	128
	129	/* crypt routines */
	130	extern int esp4_output(struct mbuf , struct secasvar );
	131	extern void esp4_input(struct mbuf *, int off);
	132	extern size_t esp_hdrsiz(struct ipsecrequest *);
	133
	134	extern int esp_schedule(const struct esp_algorithm , struct secasvar );
	135	extern int esp_auth(struct mbuf *, size_t, size_t,
	136	struct secasvar , u_char );
	137	#endif /* BSD_KERNEL_PRIVATE */
	138
	139	#endif /* _NETINET6_ESP_H_ */