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/* $OpenBSD: ip_esp.h,v 1.19 1999/02/17 18:10:38 deraadt Exp $ */
/*
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr) and
* Niels Provos (provos@physnet.uni-hamburg.de).
*
* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
* in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
* and Niels Provos.
*
* Permission to use, copy, and modify this software without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
/*
* Encapsulation Security Payload Processing
* Per RFC1827 (Atkinson, 1995)
*/
#ifndef _MD5_H_
#include <sys/md5k.h>
#endif
#include <netinet/ip_sha1.h>
#include <netinet/ip_rmd160.h>
#include <netinet/ip_blf.h>
#include <netinet/ip_cast.h>
/* IV lengths */
#define ESP_DES_IVS 8
#define ESP_3DES_IVS 8
#define ESP_BLF_IVS 8
#define ESP_CAST_IVS 8
#define ESP_MAX_IVS ESP_3DES_IVS
/* Block sizes -- it is assumed that they're powers of 2 */
#define ESP_DES_BLKS 8
#define ESP_3DES_BLKS 8
#define ESP_BLF_BLKS 8
#define ESP_CAST_BLKS 8
#define ESP_MAX_BLKS ESP_3DES_BLKS
/* Various defines for the "new" ESP */
#define ESP_NEW_ALEN 12 /* 96bits authenticator */
#define ESP_NEW_IPAD_VAL 0x36
#define ESP_NEW_OPAD_VAL 0x5C
struct esp_hash {
int type;
char *name;
u_int16_t hashsize;
u_int16_t ctxsize;
void (*Init) __P((void *));
void (*Update) __P((void *, u_int8_t *, u_int16_t));
void (*Final) __P((u_int8_t *, void *));
};
struct esp_xform {
int type;
char *name;
u_int16_t blocksize, ivsize;
u_int16_t minkey, maxkey;
u_int32_t ivmask; /* Or all possible modes, zero iv = 1 */
void (*encrypt) __P((void *, u_int8_t *));
void (*decrypt) __P((void *, u_int8_t *));
};
struct esp_old {
u_int32_t esp_spi; /* Security Parameters Index */
u_int8_t esp_iv[8]; /* iv[4] may actually be data! */
};
struct esp_new {
u_int32_t esp_spi; /* Security Parameter Index */
u_int32_t esp_rpl; /* Sequence Number, Replay Counter */
u_int8_t esp_iv[8]; /* Data may start already at iv[0]! */
};
struct espstat {
u_int32_t esps_hdrops; /* packet shorter than header shows */
u_int32_t esps_notdb;
u_int32_t esps_badkcr;
u_int32_t esps_qfull;
u_int32_t esps_noxform;
u_int32_t esps_badilen;
u_int32_t esps_wrap; /* Replay counter wrapped around */
u_int32_t esps_badauth; /* Only valid for transforms with auth */
u_int32_t esps_replay; /* Possible packet replay detected */
u_int32_t esps_input; /* Input ESP packets */
u_int32_t esps_output; /* Output ESP packets */
u_int32_t esps_invalid; /* Trying to use an invalid TDB */
u_int64_t esps_ibytes; /* input bytes */
u_int64_t esps_obytes; /* output bytes */
u_int32_t esps_toobig; /* packet got larger than IP_MAXPACKET */
};
struct esp_old_xdata {
u_int32_t edx_enc_algorithm;
int32_t edx_ivlen; /* 4 or 8 */
struct esp_xform *edx_xform;
union {
u_int8_t Iv[ESP_3DES_IVS]; /* that's enough space */
u_int32_t Ivl; /* make sure this is 4 bytes */
u_int64_t Ivq; /* make sure this is 8 bytes! */
} Iu;
#define edx_iv Iu.Iv
#define edx_ivl Iu.Ivl
#define edx_ivq Iu.Ivq
union {
u_int8_t Rk[3][8];
u_int32_t Eks[3][16][2];
} Xu;
#define edx_rk Xu.Rk
#define edx_eks Xu.Eks
};
struct esp_old_xencap {
u_int32_t edx_enc_algorithm;
u_int32_t edx_ivlen;
u_int32_t edx_keylen;
u_int8_t edx_data[1]; /* IV + key material */
};
#define ESP_OLD_XENCAP_LEN (3 * sizeof(u_int32_t))
struct esp_new_xencap {
u_int32_t edx_enc_algorithm;
u_int32_t edx_hash_algorithm;
u_int32_t edx_ivlen; /* 0 or 8 */
u_int16_t edx_confkeylen;
u_int16_t edx_authkeylen;
int32_t edx_wnd;
u_int32_t edx_flags;
u_int8_t edx_data[1]; /* IV + key material */
};
#define ESP_NEW_XENCAP_LEN (6 * sizeof(u_int32_t))
#define ESP_NEW_FLAG_AUTH 0x00000001 /* Doing authentication too */
#define ESP_NEW_FLAG_NPADDING 0x00000002 /* New style padding */
struct esp_new_xdata {
u_int32_t edx_enc_algorithm;
u_int32_t edx_hash_algorithm;
u_int32_t edx_ivlen; /* 0 or 8 */
u_int32_t edx_rpl; /* Replay counter */
int32_t edx_wnd; /* Replay window */
u_int32_t edx_bitmap;
u_int32_t edx_flags;
u_int32_t edx_initial; /* initial replay value */
struct esp_hash *edx_hash;
struct esp_xform *edx_xform;
union {
u_int8_t Iv[ESP_MAX_IVS]; /* that's enough space */
u_int32_t Ivl; /* make sure this is 4 bytes */
u_int64_t Ivq; /* make sure this is 8 bytes! */
} Iu;
union {
u_int8_t Rk[3][8];
u_int32_t Eks[3][16][2];
blf_ctx Bks;
cast_key Cks;
} Xu;
union {
MD5_CTX edx_MD5_ictx;
SHA1_CTX edx_SHA1_ictx;
RMD160_CTX edx_RMD160_ictx;
} edx_ictx;
union {
MD5_CTX edx_MD5_octx;
SHA1_CTX edx_SHA1_octx;
RMD160_CTX edx_RMD160_octx;
} edx_octx;
};
#define edx_bks Xu.Bks
#define edx_cks Xu.Cks
#define edx_md5_ictx edx_ictx.edx_MD5_ictx
#define edx_md5_octx edx_octx.edx_MD5_octx
#define edx_sha1_ictx edx_ictx.edx_SHA1_ictx
#define edx_sha1_octx edx_octx.edx_SHA1_octx
#define edx_rmd160_ictx edx_ictx.edx_RMD160_ictx
#define edx_rmd160_octx edx_octx.edx_RMD160_octx
#define ESP_OLD_FLENGTH 12
#define ESP_NEW_FLENGTH 16
#ifdef _KERNEL
struct espstat espstat;
#endif
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