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/* $OpenBSD: ip_ah.h,v 1.7 1997/06/25 07:53:21 provos 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.
*/
/*
* Authentication Header Processing
* Per RFC1826 (Atkinson, 1995)
*/
#include <sys/md5k.h>
#include <netinet/ip_sha1.h>
struct ah
{
u_int8_t ah_nh; /* Next header (protocol) */
u_int8_t ah_hl; /* AH length, in 32-bit words */
u_int16_t ah_rv; /* reserved, must be 0 */
u_int32_t ah_spi; /* Security Parameters Index */
u_int8_t ah_data[1]; /* More, really*/
};
#define AH_FLENGTH 8 /* size of fixed part */
struct ahstat
{
u_int32_t ahs_hdrops; /* packet shorter than header shows */
u_int32_t ahs_notdb;
u_int32_t ahs_badkcr;
u_int32_t ahs_badauth;
u_int32_t ahs_noxform;
u_int32_t ahs_qfull;
u_int32_t ahs_wrap;
u_int32_t ahs_replay;
u_int32_t ahs_badauthl; /* bad authenticator length */
u_int32_t ahs_input; /* Input AH packets */
u_int32_t ahs_output; /* Output AH packets */
u_int32_t ahs_invalid; /* Trying to use an invalid TDB */
};
#define AHHMACMD5_KMAX 64 /* max 512 bits key */
#define AHHMACMD5_AMAX 64 /* up to 512 bits of authenticator */
#define AHHMACMD5_RPLS 2 /* 64 bits of replay counter */
#define HMACMD5_HASHLEN 16
#define HMACMD5_RPLENGTH 8
#define HMACMD5_IPAD_VAL 0x36
#define HMACMD5_OPAD_VAL 0x5C
#define AHHMACMD5_KMAX 64 /* max 512 bits key */
#define AHHMACMD5_AMAX 64 /* up to 512 bits of authenticator */
#define AHHMACMD5_RPLS 2 /* 64 bits of replay counter */
#define HMACMD5_HASHLEN 16
#define HMACMD5_RPLENGTH 8
#define HMACMD5_IPAD_VAL 0x36
#define HMACMD5_OPAD_VAL 0x5C
struct ahhmacmd5
{
u_int8_t ah_nh; /* Next header (protocol) */
u_int8_t ah_hl; /* AH length, in 32-bit words */
u_int16_t ah_rv; /* reserved, must be 0 */
u_int32_t ah_spi; /* Security Parameters Index */
u_int64_t ah_rpl; /* Replay prevention */
u_int8_t ah_data[AHHMACMD5_AMAX];/* Authenticator */
};
struct ahhmacmd5_xencap
{
u_int16_t amx_alen;
u_int16_t amx_rpl;
int32_t amx_wnd;
u_int8_t amx_key[AHHMACMD5_KMAX];
};
struct ahhmacmd5_xdata
{
u_int32_t amx_alen; /* authenticator length */
int32_t amx_wnd;
u_int64_t amx_rpl; /* Replay counter */
u_int64_t amx_bitmap;
MD5_CTX amx_ictx; /* Internal key+padding */
MD5_CTX amx_octx; /* External key+padding */
};
#define AHHMACSHA1_KMAX 64 /* max 512 bits key */
#define AHHMACSHA1_AMAX 64 /* up to 512 bits of authenticator */
#define AHHMACSHA1_RPLS 2 /* 64 bits of replay counter */
#define HMACSHA1_HASHLEN 20
#define HMACSHA1_RPLENGTH 8
#define HMACSHA1_IPAD_VAL 0x36
#define HMACSHA1_OPAD_VAL 0x5C
struct ahhmacsha1
{
u_int8_t ah_nh; /* Next header (protocol) */
u_int8_t ah_hl; /* AH length, in 32-bit words */
u_int16_t ah_rv; /* reserved, must be 0 */
u_int32_t ah_spi; /* Security Parameters Index */
u_int64_t ah_rpl; /* Replay prevention */
u_int8_t ah_data[AHHMACSHA1_AMAX];/* Authenticator */
};
struct ahhmacsha1_xencap
{
u_int32_t amx_alen;
int32_t amx_wnd;
u_int8_t amx_key[AHHMACSHA1_KMAX];
};
struct ahhmacsha1_xdata
{
u_int32_t amx_alen; /* authenticator length */
int32_t amx_wnd;
u_int64_t amx_rpl; /* Replay counter */
u_int64_t amx_bitmap;
SHA1_CTX amx_ictx; /* Internal key+padding */
SHA1_CTX amx_octx; /* External key+padding */
};
#define AHMD5_KMAX 32 /* max 256 bits key */
#define AHMD5_AMAX 64 /* up to 512 bits of authenticator */
#define AHSHA1_KMAX 32
#define AHSHA1_AMAX 64
struct ahmd5
{
u_int8_t ah_nh; /* Next header (protocol) */
u_int8_t ah_hl; /* AH length, in 32-bit words */
u_int16_t ah_rv; /* reserved, must be 0 */
u_int32_t ah_spi; /* Security Parameters Index */
u_int8_t ah_data[AHMD5_AMAX]; /* */
};
struct ahsha1
{
u_int8_t ah_nh; /* Next header (protocol) */
u_int8_t ah_hl; /* AH length, in 32-bit words */
u_int16_t ah_rv; /* reserved, must be 0 */
u_int32_t ah_spi; /* Security Parameters Index */
u_int8_t ah_data[AHSHA1_AMAX]; /* */
};
#define AHMD5_ALEN 16 /* Size of MD5 digest */
#define AHSHA1_ALEN 20 /* Size of SHA-1 digest */
struct ahmd5_xdata
{
u_int16_t amx_klen; /* Key material length */
u_int16_t amx_alen; /* authenticator length */
u_int8_t amx_key[AHMD5_KMAX]; /* Key material */
};
struct ahsha1_xdata
{
u_int16_t amx_klen; /* Key material length */
u_int16_t amx_alen; /* authenticator length */
u_int8_t amx_key[AHSHA1_KMAX]; /* Key material */
};
#ifdef _KERNEL
struct ahstat ahstat;
#endif
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