1 /* $NetBSD: xform.h,v 1.16 2018/05/01 08:08:46 maxv 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 struct secasvar *tc_sav; /* ipsec SA */ 62 }; 63 64 struct ipescrequest; 65 66 struct xformsw { 67 u_short xf_type; /* xform ID */ 68 #define XF_IP4 1 /* IP inside IP */ 69 #define XF_AH 2 /* AH */ 70 #define XF_ESP 3 /* ESP */ 71 #define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 72 #define XF_IPCOMP 6 /* IPCOMP */ 73 u_short xf_flags; 74 #define XFT_AUTH 0x0001 75 #define XFT_CONF 0x0100 76 #define XFT_COMP 0x1000 77 const char *xf_name; /* human-readable name */ 78 int (*xf_init)(struct secasvar*, const struct xformsw*);/* setup */ 79 int (*xf_zeroize)(struct secasvar*); /* cleanup */ 80 int (*xf_input)(struct mbuf*, struct secasvar*, /* input */ 81 int, int); 82 int (*xf_output)(struct mbuf*, /* output */ 83 const struct ipsecrequest *, struct secasvar *, 84 struct mbuf **, int, int); 85 struct xformsw *xf_next; /* list of registered xforms */ 86 }; 87 88 #ifdef _KERNEL 89 extern void xform_register(struct xformsw*); 90 extern int xform_init(struct secasvar *sav, int xftype); 91 92 struct cryptoini; 93 94 /* XF_IP4 */ 95 int ip4_input6(struct mbuf **m, int *offp, int proto, void *); 96 void ip4_input(struct mbuf *m, int, int, void *); 97 int ipip_output(struct mbuf *, const struct ipsecrequest *, struct secasvar *, 98 struct mbuf **, int, int); 99 100 /* XF_AH */ 101 int ah_init0(struct secasvar *, const struct xformsw *, struct cryptoini *); 102 int ah_zeroize(struct secasvar *sav); 103 const struct auth_hash *ah_algorithm_lookup(int alg); 104 size_t ah_hdrsiz(const struct secasvar *); 105 106 /* XF_ESP */ 107 const struct enc_xform *esp_algorithm_lookup(int alg); 108 size_t esp_hdrsiz(const struct secasvar *sav); 109 110 /* XF_COMP */ 111 const struct comp_algo *ipcomp_algorithm_lookup(int alg); 112 113 #endif /* _KERNEL */ 114 #endif /* !_NETIPSEC_XFORM_H_ */ 115