1 /* $FreeBSD: src/sys/netinet6/ah.h,v 1.3.2.2 2001/07/03 11:01:49 ume Exp $ */ 2 /* $KAME: ah.h,v 1.13 2000/10/18 21:28:00 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * RFC1826/2402 authentication header. 35 */ 36 37 #ifndef _NETINET6_AH_H_ 38 #define _NETINET6_AH_H_ 39 #include <sys/appleapiopts.h> 40 41 #include <sys/types.h> 42 43 #ifdef BSD_KERNEL_PRIVATE 44 #include <corecrypto/cchmac.h> 45 #include <corecrypto/ccsha2.h> 46 #endif /* BSD_KERNEL_PRIVATE */ 47 48 struct ah { 49 u_int8_t ah_nxt; /* Next Header */ 50 u_int8_t ah_len; /* Length of data, in 32bit */ 51 u_int16_t ah_reserve; /* Reserved for future use */ 52 u_int32_t ah_spi; /* Security parameter index */ 53 /* variable size, 32bit bound*/ /* Authentication data */ 54 }; 55 56 struct newah { 57 u_int8_t ah_nxt; /* Next Header */ 58 u_int8_t ah_len; /* Length of data + 1, in 32bit */ 59 u_int16_t ah_reserve; /* Reserved for future use */ 60 u_int32_t ah_spi; /* Security parameter index */ 61 u_int32_t ah_seq; /* Sequence number field */ 62 /* variable size, 32bit bound*/ /* Authentication data */ 63 }; 64 65 #ifdef BSD_KERNEL_PRIVATE 66 struct secasvar; 67 68 struct ah_algorithm_state { 69 const struct ccdigest_info *digest; 70 cchmac_ctx_decl(CCSHA512_STATE_SIZE, CCSHA512_BLOCK_SIZE, hmac_ctx); 71 }; 72 73 struct ah_algorithm { 74 int (*sumsiz)(struct secasvar *); 75 int (*mature)(struct secasvar *); 76 u_int16_t keymin; /* in bits */ 77 u_int16_t keymax; /* in bits */ 78 const char *name; 79 int (*init)(struct ah_algorithm_state *, struct secasvar *); 80 void (*update)(struct ah_algorithm_state *, caddr_t, size_t); 81 void (*result)(struct ah_algorithm_state *, caddr_t, size_t); 82 /* not supposed to be called directly */ 83 const struct ccdigest_info *(*digest)(void); 84 size_t (*schedlen)(const struct ah_algorithm *); 85 int (*schedule)(const struct ah_algorithm *, struct secasvar *); 86 }; 87 88 #define AH_MAXSUMSIZE 64 // sha2-512's output size 89 90 extern const struct ah_algorithm *ah_algorithm_lookup(int); 91 92 /* cksum routines */ 93 extern size_t ah_hdrlen(struct secasvar *); 94 extern size_t ah_hdrsiz(struct ipsecrequest *); 95 extern int ah_schedule(const struct ah_algorithm *, struct secasvar *); 96 97 extern void ah4_input(struct mbuf *, int); 98 extern int ah4_output(struct mbuf *, struct secasvar *); 99 extern int ah4_calccksum(struct mbuf *, caddr_t __sized_by(len), size_t len, 100 const struct ah_algorithm *, struct secasvar *); 101 #endif /* BSD_KERNEL_PRIVATE */ 102 103 #endif /* _NETINET6_AH_H_ */ 104