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/* $OpenBSD: ip_esp.h,v 1.13 1997/09/30 03:29:50 deraadt Exp $ */
/*
* The author of this code is John Ioannidis, ji@tla.org,
* (except when noted otherwise).
*
* This code was written for BSD/OS in Athens, Greece, in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis, kermit@forthnet.gr.
*
* Copyright (C) 1995, 1996, 1997 by John Ioannidis and Angelos D. Keromytis.
*
* 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.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NEITHER AUTHOR 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>
/* IV lengths */
#define ESP_DES_IVS 8
#define ESP_3DES_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
/* 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_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 */
};
struct esp_old_xdata
{
u_int32_t edx_enc_algorithm;
int32_t edx_ivlen; /* 4 or 8 */
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_int32_t edx_keylen;
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_OPADDING 0x00000002 /* Old 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 */
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];
}Xu;
union
{
struct
{
MD5_CTX edx_ictx;
MD5_CTX edx_octx;
} MD5stuff;
struct
{
SHA1_CTX edx_ictx;
SHA1_CTX edx_octx;
} SHA1stuff;
} Hashes;
};
#define edx_md5_ictx Hashes.MD5stuff.edx_ictx
#define edx_md5_octx Hashes.MD5stuff.edx_octx
#define edx_sha1_ictx Hashes.SHA1stuff.edx_ictx
#define edx_sha1_octx Hashes.SHA1stuff.edx_octx
#define ESP_OLD_FLENGTH 12
#define ESP_NEW_FLENGTH 16
#ifdef _KERNEL
struct espstat espstat;
#endif
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