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