113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/* $FreeBSD: src/sys/netinet6/ah.h,v 1.3.2.2 2001/07/03 11:01:49 ume Exp $ */
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/* $KAME: ah.h,v 1.13 2000/10/18 21:28:00 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* RFC1826/2402 authentication header.
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*/
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#ifndef _NETINET6_AH_H_
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#define _NETINET6_AH_H_
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#include <sys/appleapiopts.h>
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#include <sys/types.h>
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#ifdef BSD_KERNEL_PRIVATE
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#include <corecrypto/cchmac.h>
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#include <corecrypto/ccsha2.h>
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#include <libkern/crypto/md5.h>
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#include <libkern/crypto/sha1.h>
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#endif /* BSD_KERNEL_PRIVATE */
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struct ah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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struct newah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data + 1, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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u_int32_t ah_seq; /* Sequence number field */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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#ifdef BSD_KERNEL_PRIVATE
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struct secasvar;
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struct ah_algorithm_state {
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union {
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struct secasvar *sav;
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const struct ccdigest_info *digest;
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};
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union {
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MD5_CTX md5_ctx;
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SHA1_CTX sha1_ctx;
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cchmac_ctx_decl(CCSHA512_STATE_SIZE, CCSHA512_BLOCK_SIZE, hmac_ctx);
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};
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};
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struct ah_algorithm {
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int (*sumsiz)(struct secasvar *);
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int (*mature)(struct secasvar *);
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u_int16_t keymin; /* in bits */
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u_int16_t keymax; /* in bits */
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const char *name;
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int (*init)(struct ah_algorithm_state *, struct secasvar *);
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void (*update)(struct ah_algorithm_state *, caddr_t, size_t);
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void (*result)(struct ah_algorithm_state *, caddr_t, size_t);
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/* not supposed to be called directly */
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const struct ccdigest_info *(*digest)(void);
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size_t (*schedlen)(const struct ah_algorithm *);
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int (*schedule)(const struct ah_algorithm *, struct secasvar *);
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};
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#define AH_MAXSUMSIZE 64 // sha2-512's output size
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extern const struct ah_algorithm *ah_algorithm_lookup(int);
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/* cksum routines */
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extern size_t ah_hdrlen(struct secasvar *);
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extern size_t ah_hdrsiz(struct ipsecrequest *);
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extern int ah_schedule(const struct ah_algorithm *, struct secasvar *);
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extern void ah4_input(struct mbuf *, int);
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extern int ah4_output(struct mbuf *, struct secasvar *);
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extern int ah4_calccksum(struct mbuf *, caddr_t, size_t,
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const struct ah_algorithm *, struct secasvar *);
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#endif /* BSD_KERNEL_PRIVATE */
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#endif /* _NETINET6_AH_H_ */
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