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/*
* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
*
* This code was written by Angelos D. Keromytis in Athens, Greece, in
* February 2000. Network Security Technologies Inc. (NSTI) kindly
* supported the development of this code.
*
* Copyright (c) 2000 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 source code 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, 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.
*/
#ifndef _CRYPTO_CRYPTO_H_
#define _CRYPTO_CRYPTO_H_
/* Some initial values */
#define CRYPTO_DRIVERS_INITIAL 4
#define CRYPTO_SW_SESSIONS 32
#ifndef CRYPTO_MAX_CACHED
#define CRYPTO_MAX_CACHED 128
#endif
/* HMAC values */
#define HMAC_BLOCK_LEN 64
#define HMAC_IPAD_VAL 0x36
#define HMAC_OPAD_VAL 0x5C
/* Encryption algorithm block sizes */
#define DES_BLOCK_LEN 8
#define DES3_BLOCK_LEN 8
#define BLOWFISH_BLOCK_LEN 8
#define SKIPJACK_BLOCK_LEN 8
#define CAST128_BLOCK_LEN 8
#define EALG_MAX_BLOCK_LEN 8 /* Keep this updated */
/* Maximum hash algorithm result length */
#define AALG_MAX_RESULT_LEN 20 /* Keep this updated */
#define CRYPTO_DES_CBC 1
#define CRYPTO_3DES_CBC 2
#define CRYPTO_BLF_CBC 3
#define CRYPTO_CAST_CBC 4
#define CRYPTO_SKIPJACK_CBC 5
#define CRYPTO_MD5_HMAC96 6
#define CRYPTO_SHA1_HMAC96 7
#define CRYPTO_RIPEMD160_HMAC96 8
#define CRYPTO_MD5_KPDK 9
#define CRYPTO_SHA1_KPDK 10
#define CRYPTO_ALGORITHM_MAX 10 /* Keep this updated */
/* Standard initialization structure beginning */
struct cryptoini
{
int cri_alg; /* Algorithm to use */
int cri_klen; /* Key length, in bits */
int cri_rnd; /* Algorithm rounds, where relevant */
caddr_t cri_key; /* key to use */
struct cryptoini *cri_next;
};
/* Describe boundaries of a single crypto operation */
struct cryptodesc
{
int crd_skip; /* How many bytes to ignore from start */
int crd_len; /* How many bytes to process */
int crd_inject; /* Where to inject results, if applicable */
int crd_flags;
#define CRD_F_ENCRYPT 0x1 /* Set when doing encryption */
#define CRD_F_HALFIV 0x2
#define CRD_F_IV_PRESENT 0x4 /* Used/sensible only when encrypting */
struct cryptoini CRD_INI; /* Initialization/context data */
#define crd_key CRD_INI.cri_key
#define crd_rnd CRD_INI.cri_rnd
#define crd_alg CRD_INI.cri_alg
#define crd_klen CRD_INI.cri_klen
struct cryptodesc *crd_next;
};
/* Structure describing complete operation */
struct cryptop
{
u_int64_t crp_sid; /* Session ID */
int crp_ilen; /* Input data total length */
int crp_olen; /* Result total length (unused for now) */
int crp_alloctype; /* Type of buf to allocate if needed */
int crp_etype; /* Error type (zero means no error).
* All error codes except EAGAIN
* indicate possible data corruption (as in,
* the data have been touched). On all
* errors, the crp_sid may have changed
* (reset to a new one), so the caller
* should always check and use the new
* value on future requests.
*/
int crp_flags;
#define CRYPTO_F_IMBUF 0x0001 /* Input is an mbuf chain, otherwise contig */
caddr_t crp_buf; /* Data to be processed */
caddr_t crp_opaque1;/* Opaque pointer, passed along */
caddr_t crp_opaque2;/* Opaque pointer, passed along */
caddr_t crp_opaque3;/* Opaque pointer, passed along */
caddr_t crp_opaque4;/* Opaque pointer, passed along */
struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
int (*crp_callback) (struct cryptop *); /* Callback function */
struct cryptop *crp_next;
};
#define CRYPTO_BUF_CONTIG 0x1
#define CRYPTO_BUF_MBUF 0x2
#define CRYPTO_OP_DECRYPT 0x0
#define CRYPTO_OP_ENCRYPT 0x1
/* Crypto capabilities structure */
struct cryptocap
{
u_int32_t cc_sessions;
u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1]; /* Supported */
u_int8_t cc_flags;
#define CRYPTOCAP_F_CLEANUP 0x1
int (*cc_newsession) (u_int32_t *, struct cryptoini *);
int (*cc_process) (struct cryptop *);
int (*cc_freesession) (u_int32_t);
};
#ifdef _KERNEL
extern int crypto_newsession(u_int64_t *, struct cryptoini *);
extern int crypto_freesession(u_int64_t);
extern int crypto_dispatch(struct cryptop *);
extern int crypto_register(u_int32_t, int, void *, void *, void *);
extern int crypto_unregister(u_int32_t, int);
extern int32_t crypto_get_driverid(void);
extern struct cryptop *crypto_getreq(int);
extern void crypto_freereq(struct cryptop *);
#endif /* _KERNEL */
#endif /* _CRYPTO_CRYPTO_H_ */
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