1 /* $NetBSD: xform.h,v 1.22 2022/05/22 11:39:08 riastradh Exp $ */ 2 /* $FreeBSD: xform.h,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $ */ 3 /* $OpenBSD: ip_ipsp.h,v 1.119 2002/03/14 01:27:11 millert Exp $ */ 4 /* 5 * The authors of this code are John Ioannidis (ji@tla.org), 6 * Angelos D. Keromytis (kermit@csd.uch.gr), 7 * Niels Provos (provos@physnet.uni-hamburg.de) and 8 * Niklas Hallqvist (niklas@appli.se). 9 * 10 * The original version of this code was written by John Ioannidis 11 * for BSD/OS in Athens, Greece, in November 1995. 12 * 13 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 14 * by Angelos D. Keromytis. 15 * 16 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 17 * and Niels Provos. 18 * 19 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist. 20 * 21 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 22 * Angelos D. Keromytis and Niels Provos. 23 * Copyright (c) 1999 Niklas Hallqvist. 24 * Copyright (c) 2001, Angelos D. Keromytis. 25 * 26 * Permission to use, copy, and modify this software with or without fee 27 * is hereby granted, provided that this entire notice is included in 28 * all copies of any software which is or includes a copy or 29 * modification of this software. 30 * You may use this code under the GNU public license if you so wish. Please 31 * contribute changes back to the authors under this freer than GPL license 32 * so that we may further the use of strong encryption without limitations to 33 * all. 34 * 35 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 36 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 37 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 38 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 39 * PURPOSE. 40 */ 41 42 #ifndef _NETIPSEC_XFORM_H_ 43 #define _NETIPSEC_XFORM_H_ 44 45 #include <sys/types.h> 46 #include <netinet/in.h> 47 #include <opencrypto/xform.h> 48 49 /* 50 * Opaque data structure hung off a crypto operation descriptor. 51 */ 52 struct secasvar; 53 struct tdb_crypto { 54 const struct ipsecrequest *tc_isr; /* ipsec request state */ 55 u_int32_t tc_spi; /* associated SPI */ 56 union sockaddr_union tc_dst; /* dst addr of packet */ 57 u_int8_t tc_proto; /* current protocol, e.g. AH */ 58 u_int8_t tc_nxt; /* next protocol, e.g. IPV4 */ 59 int tc_protoff; /* current protocol offset */ 60 int tc_skip; /* data offset */ 61 int tc_flags; /* outer protocol flags, e.g. IPV6_MINMTU */ 62 struct secasvar *tc_sav; /* ipsec SA */ 63 }; 64 65 struct ipescrequest; 66 67 struct xformsw { 68 u_short xf_type; 69 #define XF_IP4 1 /* IP inside IP */ 70 #define XF_AH 2 /* AH */ 71 #define XF_ESP 3 /* ESP */ 72 #define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 73 #define XF_IPCOMP 6 /* IPCOMP */ 74 u_short xf_flags; 75 #define XFT_AUTH 0x0001 76 #define XFT_CONF 0x0100 77 #define XFT_COMP 0x1000 78 const char *xf_name; 79 int (*xf_init)(struct secasvar *, const struct xformsw *); 80 void (*xf_zeroize)(struct secasvar *); 81 int (*xf_input)(struct mbuf *, struct secasvar *, int, int); 82 int (*xf_output)(struct mbuf *, const struct ipsecrequest *, 83 struct secasvar *, int, int, int); 84 struct xformsw *xf_next; /* list of registered xforms */ 85 }; 86 87 #ifdef _KERNEL 88 void xform_register(struct xformsw *); 89 int xform_init(struct secasvar *sav, int); 90 91 struct cryptoini; 92 93 /* XF_IP4 */ 94 int ipip_output(struct mbuf *, struct secasvar *, struct mbuf **); 95 96 /* XF_AH */ 97 int ah_init0(struct secasvar *, const struct xformsw *, struct cryptoini *); 98 void ah_zeroize(struct secasvar *); 99 const struct auth_hash *ah_algorithm_lookup(int); 100 size_t ah_authsiz(const struct secasvar *); 101 size_t ah_hdrsiz(const struct secasvar *); 102 103 /* XF_ESP */ 104 const struct enc_xform *esp_algorithm_lookup(int); 105 size_t esp_hdrsiz(const struct secasvar *); 106 107 /* XF_COMP */ 108 const struct comp_algo *ipcomp_algorithm_lookup(int); 109 110 #endif /* _KERNEL */ 111 #endif /* !_NETIPSEC_XFORM_H_ */ 112