package/libs/ocf-crypto-headers/src/cryptodev.h

   1 /*      $FreeBSD: src/sys/opencrypto/cryptodev.h,v 1.25 2007/05/09 19:37:02 gnn Exp $   */
   2 /*      $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $     */
   3
   4 /*-
   5  * Linux port done by David McCullough <david_mccullough@mcafee.com>
   6  * Copyright (C) 2006-2010 David McCullough
   7  * Copyright (C) 2004-2005 Intel Corporation.
   8  * The license and original author are listed below.
   9  *
  10  * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
  11  * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
  12  *
  13  * This code was written by Angelos D. Keromytis in Athens, Greece, in
  14  * February 2000. Network Security Technologies Inc. (NSTI) kindly
  15  * supported the development of this code.
  16  *
  17  * Copyright (c) 2000 Angelos D. Keromytis
  18  *
  19  * Permission to use, copy, and modify this software with or without fee
  20  * is hereby granted, provided that this entire notice is included in
  21  * all source code copies of any software which is or includes a copy or
  22  * modification of this software.
  23  *
  24  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
  25  * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
  26  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
  27  * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
  28  * PURPOSE.
  29  *
  30  * Copyright (c) 2001 Theo de Raadt
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  *
  36  * 1. Redistributions of source code must retain the above copyright
  37  *   notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *   notice, this list of conditions and the following disclaimer in the
  40  *   documentation and/or other materials provided with the distribution.
  41  * 3. The name of the author may not be used to endorse or promote products
  42  *   derived from this software without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  45  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  46  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  47  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  48  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  49  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  53  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  *
  55  * Effort sponsored in part by the Defense Advanced Research Projects
  56  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  57  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
  58  *
  59  */
  60
  61 #ifndef _CRYPTO_CRYPTO_H_
  62 #define _CRYPTO_CRYPTO_H_
  63
  64 /* Some initial values */
  65 #define CRYPTO_DRIVERS_INITIAL  4
  66 #define CRYPTO_SW_SESSIONS      32
  67
  68 /* Hash values */
  69 #define NULL_HASH_LEN           0
  70 #define MD5_HASH_LEN            16
  71 #define SHA1_HASH_LEN           20
  72 #define RIPEMD160_HASH_LEN      20
  73 #define SHA2_256_HASH_LEN       32
  74 #define SHA2_384_HASH_LEN       48
  75 #define SHA2_512_HASH_LEN       64
  76 #define MD5_KPDK_HASH_LEN       16
  77 #define SHA1_KPDK_HASH_LEN      20
  78 /* Maximum hash algorithm result length */
  79 #define HASH_MAX_LEN            SHA2_512_HASH_LEN /* Keep this updated */
  80
  81 /* HMAC values */
  82 #define NULL_HMAC_BLOCK_LEN                     1
  83 #define MD5_HMAC_BLOCK_LEN                      64
  84 #define SHA1_HMAC_BLOCK_LEN                     64
  85 #define RIPEMD160_HMAC_BLOCK_LEN        64
  86 #define SHA2_256_HMAC_BLOCK_LEN         64
  87 #define SHA2_384_HMAC_BLOCK_LEN         128
  88 #define SHA2_512_HMAC_BLOCK_LEN         128
  89 /* Maximum HMAC block length */
  90 #define HMAC_MAX_BLOCK_LEN              SHA2_512_HMAC_BLOCK_LEN /* Keep this updated */
  91 #define HMAC_IPAD_VAL                   0x36
  92 #define HMAC_OPAD_VAL                   0x5C
  93
  94 /* Encryption algorithm block sizes */
  95 #define NULL_BLOCK_LEN                  1
  96 #define DES_BLOCK_LEN                   8
  97 #define DES3_BLOCK_LEN                  8
  98 #define BLOWFISH_BLOCK_LEN              8
  99 #define SKIPJACK_BLOCK_LEN              8
 100 #define CAST128_BLOCK_LEN               8
 101 #define RIJNDAEL128_BLOCK_LEN   16
 102 #define AES_BLOCK_LEN                   RIJNDAEL128_BLOCK_LEN
 103 #define CAMELLIA_BLOCK_LEN              16
 104 #define ARC4_BLOCK_LEN                  1
 105 #define EALG_MAX_BLOCK_LEN              AES_BLOCK_LEN /* Keep this updated */
 106
 107 /* Encryption algorithm min and max key sizes */
 108 #define NULL_MIN_KEY_LEN                0
 109 #define NULL_MAX_KEY_LEN                0
 110 #define DES_MIN_KEY_LEN                 8
 111 #define DES_MAX_KEY_LEN                 8
 112 #define DES3_MIN_KEY_LEN                24
 113 #define DES3_MAX_KEY_LEN                24
 114 #define BLOWFISH_MIN_KEY_LEN    4
 115 #define BLOWFISH_MAX_KEY_LEN    56
 116 #define SKIPJACK_MIN_KEY_LEN    10
 117 #define SKIPJACK_MAX_KEY_LEN    10
 118 #define CAST128_MIN_KEY_LEN             5
 119 #define CAST128_MAX_KEY_LEN             16
 120 #define RIJNDAEL128_MIN_KEY_LEN 16
 121 #define RIJNDAEL128_MAX_KEY_LEN 32
 122 #define AES_MIN_KEY_LEN                 RIJNDAEL128_MIN_KEY_LEN
 123 #define AES_MAX_KEY_LEN                 RIJNDAEL128_MAX_KEY_LEN
 124 #define CAMELLIA_MIN_KEY_LEN    16
 125 #define CAMELLIA_MAX_KEY_LEN    32
 126 #define ARC4_MIN_KEY_LEN                1
 127 #define ARC4_MAX_KEY_LEN                256
 128
 129 /* Max size of data that can be processed */
 130 #define CRYPTO_MAX_DATA_LEN             64*1024 - 1
 131
 132 #define CRYPTO_ALGORITHM_MIN    1
 133 #define CRYPTO_DES_CBC                  1
 134 #define CRYPTO_3DES_CBC                 2
 135 #define CRYPTO_BLF_CBC                  3
 136 #define CRYPTO_CAST_CBC                 4
 137 #define CRYPTO_SKIPJACK_CBC             5
 138 #define CRYPTO_MD5_HMAC                 6
 139 #define CRYPTO_SHA1_HMAC                7
 140 #define CRYPTO_RIPEMD160_HMAC   8
 141 #define CRYPTO_MD5_KPDK                 9
 142 #define CRYPTO_SHA1_KPDK                10
 143 #define CRYPTO_RIJNDAEL128_CBC  11 /* 128 bit blocksize */
 144 #define CRYPTO_AES_CBC                  11 /* 128 bit blocksize -- the same as above */
 145 #define CRYPTO_ARC4                             12
 146 #define CRYPTO_MD5                              13
 147 #define CRYPTO_SHA1                             14
 148 #define CRYPTO_NULL_HMAC                15
 149 #define CRYPTO_NULL_CBC                 16
 150 #define CRYPTO_DEFLATE_COMP             17 /* Deflate compression algorithm */
 151 #define CRYPTO_SHA2_256_HMAC    18
 152 #define CRYPTO_SHA2_384_HMAC    19
 153 #define CRYPTO_SHA2_512_HMAC    20
 154 #define CRYPTO_CAMELLIA_CBC             21
 155 #define CRYPTO_SHA2_256                 22
 156 #define CRYPTO_SHA2_384                 23
 157 #define CRYPTO_SHA2_512                 24
 158 #define CRYPTO_RIPEMD160                25
 159 #define CRYPTO_LZS_COMP                 26
 160 #define CRYPTO_ALGORITHM_MAX    26 /* Keep updated - see above */
 161
 162 /* Algorithm flags */
 163 #define CRYPTO_ALG_FLAG_SUPPORTED       0x01 /* Algorithm is supported */
 164 #define CRYPTO_ALG_FLAG_RNG_ENABLE      0x02 /* Has HW RNG for DH/DSA */
 165 #define CRYPTO_ALG_FLAG_DSA_SHA         0x04 /* Can do SHA on msg */
 166
 167 /*
 168  * Crypto driver/device flags.  They can set in the crid
 169  * parameter when creating a session or submitting a key
 170  * op to affect the device/driver assigned.  If neither
 171  * of these are specified then the crid is assumed to hold
 172  * the driver id of an existing (and suitable) device that
 173  * must be used to satisfy the request.
 174  */
 175 #define CRYPTO_FLAG_HARDWARE    0x01000000      /* hardware accelerated */
 176 #define CRYPTO_FLAG_SOFTWARE    0x02000000      /* software implementation */
 177
 178 /* NB: deprecated */
 179 struct session_op {
 180         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
 181         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
 182
 183         u_int32_t       keylen;         /* cipher key */
 184         caddr_t         key;
 185         int             mackeylen;      /* mac key */
 186         caddr_t         mackey;
 187
 188         u_int32_t       ses;            /* returns: session # */
 189 };
 190
 191 struct session2_op {
 192         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
 193         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
 194
 195         u_int32_t       keylen;         /* cipher key */
 196         caddr_t         key;
 197         int             mackeylen;      /* mac key */
 198         caddr_t         mackey;
 199
 200         u_int32_t       ses;            /* returns: session # */
 201         int             crid;           /* driver id + flags (rw) */
 202         int             pad[4];         /* for future expansion */
 203 };
 204
 205 struct crypt_op {
 206         u_int32_t       ses;
 207         u_int16_t       op;             /* i.e. COP_ENCRYPT */
 208 #define COP_NONE        0
 209 #define COP_ENCRYPT     1
 210 #define COP_DECRYPT     2
 211         u_int16_t       flags;
 212 #define COP_F_BATCH     0x0008          /* Batch op if possible */
 213         u_int           len;
 214         caddr_t         src, dst;       /* become iov[] inside kernel */
 215         caddr_t         mac;            /* must be big enough for chosen MAC */
 216         caddr_t         iv;
 217 };
 218
 219 /*
 220  * Parameters for looking up a crypto driver/device by
 221  * device name or by id.  The latter are returned for
 222  * created sessions (crid) and completed key operations.
 223  */
 224 struct crypt_find_op {
 225         int             crid;           /* driver id + flags */
 226         char            name[32];       /* device/driver name */
 227 };
 228
 229 /* bignum parameter, in packed bytes, ... */
 230 struct crparam {
 231         caddr_t         crp_p;
 232         u_int           crp_nbits;
 233 };
 234
 235 #define CRK_MAXPARAM    8
 236
 237 struct crypt_kop {
 238         u_int           crk_op;         /* ie. CRK_MOD_EXP or other */
 239         u_int           crk_status;     /* return status */
 240         u_short         crk_iparams;    /* # of input parameters */
 241         u_short         crk_oparams;    /* # of output parameters */
 242         u_int           crk_crid;       /* NB: only used by CIOCKEY2 (rw) */
 243         struct crparam  crk_param[CRK_MAXPARAM];
 244 };
 245 #define CRK_ALGORITM_MIN        0
 246 #define CRK_MOD_EXP             0
 247 #define CRK_MOD_EXP_CRT         1
 248 #define CRK_DSA_SIGN            2
 249 #define CRK_DSA_VERIFY          3
 250 #define CRK_DH_COMPUTE_KEY      4
 251 #define CRK_ALGORITHM_MAX       4 /* Keep updated - see below */
 252
 253 #define CRF_MOD_EXP             (1 << CRK_MOD_EXP)
 254 #define CRF_MOD_EXP_CRT         (1 << CRK_MOD_EXP_CRT)
 255 #define CRF_DSA_SIGN            (1 << CRK_DSA_SIGN)
 256 #define CRF_DSA_VERIFY          (1 << CRK_DSA_VERIFY)
 257 #define CRF_DH_COMPUTE_KEY      (1 << CRK_DH_COMPUTE_KEY)
 258
 259 /*
 260  * done against open of /dev/crypto, to get a cloned descriptor.
 261  * Please use F_SETFD against the cloned descriptor.
 262  */
 263 #define CRIOGET         _IOWR('c', 100, u_int32_t)
 264 #define CRIOASYMFEAT    CIOCASYMFEAT
 265 #define CRIOFINDDEV     CIOCFINDDEV
 266
 267 /* the following are done against the cloned descriptor */
 268 #define CIOCGSESSION    _IOWR('c', 101, struct session_op)
 269 #define CIOCFSESSION    _IOW('c', 102, u_int32_t)
 270 #define CIOCCRYPT       _IOWR('c', 103, struct crypt_op)
 271 #define CIOCKEY         _IOWR('c', 104, struct crypt_kop)
 272 #define CIOCASYMFEAT    _IOR('c', 105, u_int32_t)
 273 #define CIOCGSESSION2   _IOWR('c', 106, struct session2_op)
 274 #define CIOCKEY2        _IOWR('c', 107, struct crypt_kop)
 275 #define CIOCFINDDEV     _IOWR('c', 108, struct crypt_find_op)
 276
 277 struct cryptotstat {
 278         struct timespec acc;            /* total accumulated time */
 279         struct timespec min;            /* min time */
 280         struct timespec max;            /* max time */
 281         u_int32_t       count;          /* number of observations */
 282 };
 283
 284 struct cryptostats {
 285         u_int32_t       cs_ops;         /* symmetric crypto ops submitted */
 286         u_int32_t       cs_errs;        /* symmetric crypto ops that failed */
 287         u_int32_t       cs_kops;        /* asymetric/key ops submitted */
 288         u_int32_t       cs_kerrs;       /* asymetric/key ops that failed */
 289         u_int32_t       cs_intrs;       /* crypto swi thread activations */
 290         u_int32_t       cs_rets;        /* crypto return thread activations */
 291         u_int32_t       cs_blocks;      /* symmetric op driver block */
 292         u_int32_t       cs_kblocks;     /* symmetric op driver block */
 293         /*
 294          * When CRYPTO_TIMING is defined at compile time and the
 295          * sysctl debug.crypto is set to 1, the crypto system will
 296          * accumulate statistics about how long it takes to process
 297          * crypto requests at various points during processing.
 298          */
 299         struct cryptotstat cs_invoke;   /* crypto_dipsatch -> crypto_invoke */
 300         struct cryptotstat cs_done;     /* crypto_invoke -> crypto_done */
 301         struct cryptotstat cs_cb;       /* crypto_done -> callback */
 302         struct cryptotstat cs_finis;    /* callback -> callback return */
 303
 304         u_int32_t       cs_drops;               /* crypto ops dropped due to congestion */
 305 };
 306
 307 #ifdef __KERNEL__
 308
 309 /* Standard initialization structure beginning */
 310 struct cryptoini {
 311         int             cri_alg;        /* Algorithm to use */
 312         int             cri_klen;       /* Key length, in bits */
 313         int             cri_mlen;       /* Number of bytes we want from the
 314                                            entire hash. 0 means all. */
 315         caddr_t         cri_key;        /* key to use */
 316         u_int8_t        cri_iv[EALG_MAX_BLOCK_LEN];     /* IV to use */
 317         struct cryptoini *cri_next;
 318 };
 319
 320 /* Describe boundaries of a single crypto operation */
 321 struct cryptodesc {
 322         int             crd_skip;       /* How many bytes to ignore from start */
 323         int             crd_len;        /* How many bytes to process */
 324         int             crd_inject;     /* Where to inject results, if applicable */
 325         int             crd_flags;
 326
 327 #define CRD_F_ENCRYPT           0x01    /* Set when doing encryption */
 328 #define CRD_F_IV_PRESENT        0x02    /* When encrypting, IV is already in
 329                                            place, so don't copy. */
 330 #define CRD_F_IV_EXPLICIT       0x04    /* IV explicitly provided */
 331 #define CRD_F_DSA_SHA_NEEDED    0x08    /* Compute SHA-1 of buffer for DSA */
 332 #define CRD_F_KEY_EXPLICIT      0x10    /* Key explicitly provided */
 333 #define CRD_F_COMP              0x0f    /* Set when doing compression */
 334
 335         struct cryptoini        CRD_INI; /* Initialization/context data */
 336 #define crd_iv          CRD_INI.cri_iv
 337 #define crd_key         CRD_INI.cri_key
 338 #define crd_alg         CRD_INI.cri_alg
 339 #define crd_klen        CRD_INI.cri_klen
 340 #define crd_mlen        CRD_INI.cri_mlen
 341
 342         struct cryptodesc *crd_next;
 343 };
 344
 345 /* Structure describing complete operation */
 346 struct cryptop {
 347         struct list_head crp_next;
 348         wait_queue_head_t crp_waitq;
 349
 350         u_int64_t       crp_sid;        /* Session ID */
 351         int             crp_ilen;       /* Input data total length */
 352         int             crp_olen;       /* Result total length */
 353
 354         int             crp_etype;      /*
 355                                          * Error type (zero means no error).
 356                                          * All error codes except EAGAIN
 357                                          * indicate possible data corruption (as in,
 358                                          * the data have been touched). On all
 359                                          * errors, the crp_sid may have changed
 360                                          * (reset to a new one), so the caller
 361                                          * should always check and use the new
 362                                          * value on future requests.
 363                                          */
 364         int             crp_flags;
 365
 366 #define CRYPTO_F_SKBUF          0x0001  /* Input/output are skbuf chains */
 367 #define CRYPTO_F_IOV            0x0002  /* Input/output are uio */
 368 #define CRYPTO_F_REL            0x0004  /* Must return data in same place */
 369 #define CRYPTO_F_BATCH          0x0008  /* Batch op if possible */
 370 #define CRYPTO_F_CBIMM          0x0010  /* Do callback immediately */
 371 #define CRYPTO_F_DONE           0x0020  /* Operation completed */
 372 #define CRYPTO_F_CBIFSYNC       0x0040  /* Do CBIMM if op is synchronous */
 373
 374         caddr_t         crp_buf;        /* Data to be processed */
 375         caddr_t         crp_opaque;     /* Opaque pointer, passed along */
 376         struct cryptodesc *crp_desc;    /* Linked list of processing descriptors */
 377
 378         int (*crp_callback)(struct cryptop *); /* Callback function */
 379 };
 380
 381 #define CRYPTO_BUF_CONTIG       0x0
 382 #define CRYPTO_BUF_IOV          0x1
 383 #define CRYPTO_BUF_SKBUF                0x2
 384
 385 #define CRYPTO_OP_DECRYPT       0x0
 386 #define CRYPTO_OP_ENCRYPT       0x1
 387
 388 /*
 389  * Hints passed to process methods.
 390  */
 391 #define CRYPTO_HINT_MORE        0x1     /* more ops coming shortly */
 392
 393 struct cryptkop {
 394         struct list_head krp_next;
 395         wait_queue_head_t krp_waitq;
 396
 397         int             krp_flags;
 398 #define CRYPTO_KF_DONE          0x0001  /* Operation completed */
 399 #define CRYPTO_KF_CBIMM         0x0002  /* Do callback immediately */
 400
 401         u_int           krp_op;         /* ie. CRK_MOD_EXP or other */
 402         u_int           krp_status;     /* return status */
 403         u_short         krp_iparams;    /* # of input parameters */
 404         u_short         krp_oparams;    /* # of output parameters */
 405         u_int           krp_crid;       /* desired device, etc. */
 406         u_int32_t       krp_hid;
 407         struct crparam  krp_param[CRK_MAXPARAM];        /* kvm */
 408         int             (*krp_callback)(struct cryptkop *);
 409 };
 410
 411 #include <ocf-compat.h>
 412
 413 /*
 414  * Session ids are 64 bits.  The lower 32 bits contain a "local id" which
 415  * is a driver-private session identifier.  The upper 32 bits contain a
 416  * "hardware id" used by the core crypto code to identify the driver and
 417  * a copy of the driver's capabilities that can be used by client code to
 418  * optimize operation.
 419  */
 420 #define CRYPTO_SESID2HID(_sid)  (((_sid) >> 32) & 0x00ffffff)
 421 #define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 32) & 0xff000000)
 422 #define CRYPTO_SESID2LID(_sid)  (((u_int32_t) (_sid)) & 0xffffffff)
 423
 424 extern  int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
 425 extern  int crypto_freesession(u_int64_t sid);
 426 #define CRYPTOCAP_F_HARDWARE    CRYPTO_FLAG_HARDWARE
 427 #define CRYPTOCAP_F_SOFTWARE    CRYPTO_FLAG_SOFTWARE
 428 #define CRYPTOCAP_F_SYNC        0x04000000      /* operates synchronously */
 429 extern  int32_t crypto_get_driverid(device_t dev, int flags);
 430 extern  int crypto_find_driver(const char *);
 431 extern  device_t crypto_find_device_byhid(int hid);
 432 extern  int crypto_getcaps(int hid);
 433 extern  int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
 434             u_int32_t flags);
 435 extern  int crypto_kregister(u_int32_t, int, u_int32_t);
 436 extern  int crypto_unregister(u_int32_t driverid, int alg);
 437 extern  int crypto_unregister_all(u_int32_t driverid);
 438 extern  int crypto_dispatch(struct cryptop *crp);
 439 extern  int crypto_kdispatch(struct cryptkop *);
 440 #define CRYPTO_SYMQ     0x1
 441 #define CRYPTO_ASYMQ    0x2
 442 extern  int crypto_unblock(u_int32_t, int);
 443 extern  void crypto_done(struct cryptop *crp);
 444 extern  void crypto_kdone(struct cryptkop *);
 445 extern  int crypto_getfeat(int *);
 446
 447 extern  void crypto_freereq(struct cryptop *crp);
 448 extern  struct cryptop *crypto_getreq(int num);
 449
 450 extern  int crypto_usercrypto;      /* userland may do crypto requests */
 451 extern  int crypto_userasymcrypto;  /* userland may do asym crypto reqs */
 452 extern  int crypto_devallowsoft;    /* only use hardware crypto */
 453
 454 /*
 455  * random number support,  crypto_unregister_all will unregister
 456  */
 457 extern int crypto_rregister(u_int32_t driverid,
 458                 int (*read_random)(void *arg, u_int32_t *buf, int len), void *arg);
 459 extern int crypto_runregister_all(u_int32_t driverid);
 460
 461 /*
 462  * Crypto-related utility routines used mainly by drivers.
 463  *
 464  * XXX these don't really belong here; but for now they're
 465  *     kept apart from the rest of the system.
 466  */
 467 struct uio;
 468 extern  void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
 469 extern  void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
 470 extern  struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
 471
 472 extern  void crypto_copyback(int flags, caddr_t buf, int off, int size,
 473             caddr_t in);
 474 extern  void crypto_copydata(int flags, caddr_t buf, int off, int size,
 475             caddr_t out);
 476 extern  int crypto_apply(int flags, caddr_t buf, int off, int len,
 477             int (*f)(void *, void *, u_int), void *arg);
 478
 479 #endif /* __KERNEL__ */
 480 #endif /* _CRYPTO_CRYPTO_H_ */