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/* $OpenBSD: cryptodev.h,v 1.69 2017/02/07 15:10:48 bluhm Exp $ */
/*
* 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 with or 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.
*
* Copyright (c) 2001 Theo de Raadt
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*
*/
#ifndef _CRYPTO_CRYPTO_H_
#define _CRYPTO_CRYPTO_H_
#include <sys/ioccom.h>
#include <sys/task.h>
/* Some initial values */
#define CRYPTO_DRIVERS_INITIAL 4
#define CRYPTO_DRIVERS_MAX 128
#define CRYPTO_SW_SESSIONS 32
/* HMAC values */
#define HMAC_MD5_BLOCK_LEN 64
#define HMAC_SHA1_BLOCK_LEN 64
#define HMAC_RIPEMD160_BLOCK_LEN 64
#define HMAC_SHA2_256_BLOCK_LEN 64
#define HMAC_SHA2_384_BLOCK_LEN 128
#define HMAC_SHA2_512_BLOCK_LEN 128
#define HMAC_MAX_BLOCK_LEN HMAC_SHA2_512_BLOCK_LEN /* keep in sync */
#define HMAC_IPAD_VAL 0x36
#define HMAC_OPAD_VAL 0x5C
/* Encryption algorithm block sizes */
#define DES3_BLOCK_LEN 8
#define BLOWFISH_BLOCK_LEN 8
#define CAST128_BLOCK_LEN 8
#define RIJNDAEL128_BLOCK_LEN 16
#define CHACHA20_BLOCK_LEN 64
#define EALG_MAX_BLOCK_LEN 64 /* Keep this updated */
/* Maximum hash algorithm result length */
#define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
#define CRYPTO_3DES_CBC 1
#define CRYPTO_BLF_CBC 2
#define CRYPTO_CAST_CBC 3
#define CRYPTO_MD5_HMAC 4
#define CRYPTO_SHA1_HMAC 5
#define CRYPTO_RIPEMD160_HMAC 6
#define CRYPTO_RIJNDAEL128_CBC 7 /* 128 bit blocksize */
#define CRYPTO_AES_CBC 7 /* 128 bit blocksize -- the same as above */
#define CRYPTO_DEFLATE_COMP 8 /* Deflate compression algorithm */
#define CRYPTO_NULL 9
#define CRYPTO_LZS_COMP 10 /* LZS compression algorithm */
#define CRYPTO_SHA2_256_HMAC 11
#define CRYPTO_SHA2_384_HMAC 12
#define CRYPTO_SHA2_512_HMAC 13
#define CRYPTO_AES_CTR 14
#define CRYPTO_AES_XTS 15
#define CRYPTO_AES_GCM_16 16
#define CRYPTO_AES_128_GMAC 17
#define CRYPTO_AES_192_GMAC 18
#define CRYPTO_AES_256_GMAC 19
#define CRYPTO_AES_GMAC 20
#define CRYPTO_CHACHA20_POLY1305 21
#define CRYPTO_CHACHA20_POLY1305_MAC 22
#define CRYPTO_ESN 23 /* Support for Extended Sequence Numbers */
#define CRYPTO_ALGORITHM_MAX 23 /* Keep updated */
/* Algorithm flags */
#define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */
/* 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 */
union {
u_int8_t iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
u_int8_t esn[4]; /* high-order ESN */
} u;
#define cri_iv u.iv
#define cri_esn u.esn
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 0x01 /* Set when doing encryption */
#define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in
place, so don't copy. */
#define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */
#define CRD_F_COMP 0x10 /* Set when doing compression */
#define CRD_F_ESN 0x20 /* Set when ESN field is provided */
struct cryptoini CRD_INI; /* Initialization/context data */
#define crd_esn CRD_INI.cri_esn
#define crd_iv CRD_INI.cri_iv
#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 {
struct task crp_task;
u_int64_t crp_sid; /* Session ID */
int crp_ilen; /* Input data total length */
int crp_olen; /* Result total length */
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/output are mbuf chains, otherwise contig */
#define CRYPTO_F_IOV 0x0002 /* Input/output are uio */
#define CRYPTO_F_NOQUEUE 0x0008 /* Don't use crypto queue/thread */
#define CRYPTO_F_DONE 0x0010 /* request completed */
void *crp_buf; /* Data to be processed */
void *crp_opaque; /* Opaque pointer, passed along */
struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
void (*crp_callback)(struct cryptop *); /* Callback function */
caddr_t crp_mac;
};
#define CRYPTO_BUF_IOV 0x1
#define CRYPTO_BUF_MBUF 0x2
#define CRYPTO_OP_DECRYPT 0x0
#define CRYPTO_OP_ENCRYPT 0x1
/* Crypto capabilities structure */
struct cryptocap {
u_int64_t cc_operations; /* Counter of how many ops done */
u_int64_t cc_bytes; /* Counter of how many bytes done */
u_int64_t cc_koperations; /* How many PK ops done */
u_int32_t cc_sessions; /* How many sessions allocated */
/* Symmetric/hash algorithms supported */
int cc_alg[CRYPTO_ALGORITHM_MAX + 1];
int cc_queued; /* Operations queued */
u_int8_t cc_flags;
#define CRYPTOCAP_F_CLEANUP 0x01
#define CRYPTOCAP_F_SOFTWARE 0x02
#define CRYPTOCAP_F_MPSAFE 0x04
int (*cc_newsession) (u_int32_t *, struct cryptoini *);
int (*cc_process) (struct cryptop *);
int (*cc_freesession) (u_int64_t);
};
/*
* ioctl parameter to request creation of a session.
*/
struct session_op {
u_int32_t cipher; /* ie. CRYPTO_AES_CBC */
u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
u_int32_t keylen; /* cipher key */
caddr_t key;
int mackeylen; /* mac key */
caddr_t mackey;
u_int32_t ses; /* returns: session # */
};
/*
* ioctl parameter to request a crypt/decrypt operation against a session.
*/
struct crypt_op {
u_int32_t ses;
u_int16_t op; /* ie. COP_ENCRYPT */
#define COP_ENCRYPT 1
#define COP_DECRYPT 2
u_int16_t flags; /* always 0 */
u_int len;
caddr_t src, dst; /* become iov[] inside kernel */
caddr_t mac; /* must be big enough for chosen MAC */
caddr_t iv;
};
#define CRYPTO_MAX_MAC_LEN 20
#ifdef _KERNEL
int crypto_newsession(u_int64_t *, struct cryptoini *, int);
int crypto_freesession(u_int64_t);
int crypto_dispatch(struct cryptop *);
int crypto_register(u_int32_t, int *,
int (*)(u_int32_t *, struct cryptoini *), int (*)(u_int64_t),
int (*)(struct cryptop *));
int crypto_unregister(u_int32_t, int);
int32_t crypto_get_driverid(u_int8_t);
int crypto_invoke(struct cryptop *);
void crypto_done(struct cryptop *);
void cuio_copydata(struct uio *, int, int, caddr_t);
void cuio_copyback(struct uio *, int, int, const void *);
int cuio_getptr(struct uio *, int, int *);
int cuio_apply(struct uio *, int, int,
int (*f)(caddr_t, caddr_t, unsigned int), caddr_t);
struct cryptop *crypto_getreq(int);
void crypto_freereq(struct cryptop *);
#endif /* _KERNEL */
#endif /* _CRYPTO_CRYPTO_H_ */
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