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 AES_XTS_BLOCK_LEN       16
 102 #define AES_XTS_IV_LEN          8
 103 #define AESCTR_IV_LEN           8
 104 #define AESCTR_BLOCK_LEN        16
 105 #define AESGCM_IV_LEN           8
 106 #define AESGCM_BLOCK_LEN        1
 107 #define AESGMAC_IV_LEN          8
 108 #define AESGMAC_BLOCK_LEN       1
 109 #define CAMELLIA_BLOCK_LEN      16
 110 #define TWOFISH_BLOCK_LEN       16
 111 #define SERPENT_BLOCK_LEN       16
 112 #define TWOFISH_XTS_BLOCK_LEN   16
 113 #define TWOFISH_XTS_IV_LEN      8
 114 #define SERPENT_XTS_BLOCK_LEN   16
 115 #define SERPENT_XTS_IV_LEN      8
 116 #define EALG_MAX_BLOCK_LEN      AES_BLOCK_LEN /* Keep this updated */
 117
 118 #define CRYPTO_ALGORITHM_MIN    1
 119 #define CRYPTO_DES_CBC          1
 120 #define CRYPTO_3DES_CBC         2
 121 #define CRYPTO_BLF_CBC          3
 122 #define CRYPTO_CAST_CBC         4
 123 #define CRYPTO_SKIPJACK_CBC     5
 124 #define CRYPTO_MD5_HMAC         6
 125 #define CRYPTO_SHA1_HMAC        7
 126 #define CRYPTO_RIPEMD160_HMAC   8
 127 #define CRYPTO_MD5_KPDK         9
 128 #define CRYPTO_SHA1_KPDK        10
 129 #define CRYPTO_RIJNDAEL128_CBC  11 /* 128 bit blocksize */
 130 #define CRYPTO_AES_CBC          11 /* 128 bit blocksize -- the same as above */
 131 #define CRYPTO_ARC4             12
 132 #define CRYPTO_MD5              13
 133 #define CRYPTO_SHA1             14
 134 #define CRYPTO_NULL_HMAC        15
 135 #define CRYPTO_NULL_CBC         16
 136 #define CRYPTO_DEFLATE_COMP     17 /* Deflate compression algorithm */
 137 #define CRYPTO_SHA2_256_HMAC    18
 138 #define CRYPTO_SHA2_384_HMAC    19
 139 #define CRYPTO_SHA2_512_HMAC    20
 140 #define CRYPTO_CAMELLIA_CBC     21
 141 #define CRYPTO_AES_XTS          22
 142 #define CRYPTO_AES_CTR          23
 143 #define CRYPTO_AES_GCM_16       24
 144 #define CRYPTO_AES_128_GMAC     25
 145 #define CRYPTO_AES_192_GMAC     26
 146 #define CRYPTO_AES_256_GMAC     27
 147 #define CRYPTO_AES_GMAC         28
 148 #define CRYPTO_TWOFISH_CBC      29
 149 #define CRYPTO_SERPENT_CBC      30
 150 #define CRYPTO_TWOFISH_XTS      31
 151 #define CRYPTO_SERPENT_XTS      32
 152 #define CRYPTO_ALGORITHM_MAX    32 /* Keep updated - see below */
 153
 154 /* Algorithm flags */
 155 #define CRYPTO_ALG_FLAG_SUPPORTED       0x01 /* Algorithm is supported */
 156 #define CRYPTO_ALG_FLAG_RNG_ENABLE      0x02 /* Has HW RNG for DH/DSA */
 157 #define CRYPTO_ALG_FLAG_DSA_SHA         0x04 /* Can do SHA on msg */
 158
 159 /*
 160  * Crypto driver/device flags.  They can set in the crid
 161  * parameter when creating a session or submitting a key
 162  * op to affect the device/driver assigned.  If neither
 163  * of these are specified then the crid is assumed to hold
 164  * the driver id of an existing (and suitable) device that
 165  * must be used to satisfy the request.
 166  */
 167 #define CRYPTO_FLAG_HARDWARE    0x01000000      /* hardware accelerated */
 168 #define CRYPTO_FLAG_SOFTWARE    0x02000000      /* software implementation */
 169
 170 /* NB: deprecated */
 171 struct session_op {
 172         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
 173         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
 174
 175         u_int32_t       keylen;         /* cipher key */
 176         caddr_t         key;
 177         int             mackeylen;      /* mac key */
 178         caddr_t         mackey;
 179
 180         u_int32_t       ses;            /* returns: session # */
 181 };
 182
 183 struct session2_op {
 184         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
 185         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
 186
 187         u_int32_t       keylen;         /* cipher key */
 188         caddr_t         key;
 189         int             mackeylen;      /* mac key */
 190         caddr_t         mackey;
 191
 192         u_int32_t       ses;            /* returns: session # */
 193         int             crid;           /* driver id + flags (rw) */
 194         int             pad[4];         /* for future expansion */
 195 };
 196
 197 struct crypt_op {
 198         u_int32_t       ses;
 199         u_int16_t       op;             /* i.e. COP_ENCRYPT */
 200 #define COP_ENCRYPT     1
 201 #define COP_DECRYPT     2
 202         u_int16_t       flags;
 203 #define COP_F_BATCH     0x0008          /* Batch op if possible */
 204         u_int           len;
 205         caddr_t         src, dst;       /* become iov[] inside kernel */
 206         caddr_t         mac;            /* must be big enough for chosen MAC */
 207         caddr_t         iv;
 208 };
 209
 210 /*
 211  * Parameters for looking up a crypto driver/device by
 212  * device name or by id.  The latter are returned for
 213  * created sessions (crid) and completed key operations.
 214  */
 215 struct crypt_find_op {
 216         int             crid;           /* driver id + flags */
 217         char            name[32];       /* device/driver name */
 218 };
 219
 220 /* bignum parameter, in packed bytes, ... */
 221 struct crparam {
 222         caddr_t         crp_p;
 223         u_int           crp_nbits;
 224 };
 225
 226 #define CRK_MAXPARAM    8
 227
 228 struct crypt_kop {
 229         u_int           crk_op;         /* ie. CRK_MOD_EXP or other */
 230         u_int           crk_status;     /* return status */
 231         u_short         crk_iparams;    /* # of input parameters */
 232         u_short         crk_oparams;    /* # of output parameters */
 233         u_int           crk_crid;       /* NB: only used by CIOCKEY2 (rw) */
 234         struct crparam  crk_param[CRK_MAXPARAM];
 235 };
 236 #define CRK_ALGORITM_MIN        0
 237 #define CRK_MOD_EXP             0
 238 #define CRK_MOD_EXP_CRT         1
 239 #define CRK_DSA_SIGN            2
 240 #define CRK_DSA_VERIFY          3
 241 #define CRK_DH_COMPUTE_KEY      4
 242 #define CRK_ALGORITHM_MAX       4 /* Keep updated - see below */
 243
 244 #define CRF_MOD_EXP             (1 << CRK_MOD_EXP)
 245 #define CRF_MOD_EXP_CRT         (1 << CRK_MOD_EXP_CRT)
 246 #define CRF_DSA_SIGN            (1 << CRK_DSA_SIGN)
 247 #define CRF_DSA_VERIFY          (1 << CRK_DSA_VERIFY)
 248 #define CRF_DH_COMPUTE_KEY      (1 << CRK_DH_COMPUTE_KEY)
 249
 250 /*
 251  * done against open of /dev/crypto, to get a cloned descriptor.
 252  * Please use F_SETFD against the cloned descriptor.
 253  */
 254 #define CRIOGET         _IOWR('c', 100, u_int32_t)
 255 #define CRIOASYMFEAT    CIOCASYMFEAT
 256 #define CRIOFINDDEV     CIOCFINDDEV
 257
 258 /* the following are done against the cloned descriptor */
 259 #define CIOCGSESSION    _IOWR('c', 101, struct session_op)
 260 #define CIOCFSESSION    _IOW('c', 102, u_int32_t)
 261 #define CIOCCRYPT       _IOWR('c', 103, struct crypt_op)
 262 #define CIOCKEY         _IOWR('c', 104, struct crypt_kop)
 263 #define CIOCASYMFEAT    _IOR('c', 105, u_int32_t)
 264 #define CIOCGSESSION2   _IOWR('c', 106, struct session2_op)
 265 #define CIOCKEY2        _IOWR('c', 107, struct crypt_kop)
 266 #define CIOCFINDDEV     _IOWR('c', 108, struct crypt_find_op)
 267
 268 struct cryptotstat {
 269         struct timespec acc;            /* total accumulated time */
 270         struct timespec min;            /* min time */
 271         struct timespec max;            /* max time */
 272         u_int32_t       count;          /* number of observations */
 273 };
 274
 275 struct cryptostats {
 276         u_int32_t       cs_ops;         /* symmetric crypto ops submitted */
 277         u_int32_t       cs_errs;        /* symmetric crypto ops that failed */
 278         u_int32_t       cs_kops;        /* asymetric/key ops submitted */
 279         u_int32_t       cs_kerrs;       /* asymetric/key ops that failed */
 280         u_int32_t       cs_intrs;       /* crypto swi thread activations */
 281         u_int32_t       cs_rets;        /* crypto return thread activations */
 282         u_int32_t       cs_blocks;      /* symmetric op driver block */
 283         u_int32_t       cs_kblocks;     /* symmetric op driver block */
 284         /*
 285          * When CRYPTO_TIMING is defined at compile time and the
 286          * sysctl debug.crypto is set to 1, the crypto system will
 287          * accumulate statistics about how long it takes to process
 288          * crypto requests at various points during processing.
 289          */
 290         struct cryptotstat cs_invoke;   /* crypto_dipsatch -> crypto_invoke */
 291         struct cryptotstat cs_done;     /* crypto_invoke -> crypto_done */
 292         struct cryptotstat cs_cb;       /* crypto_done -> callback */
 293         struct cryptotstat cs_finis;    /* callback -> callback return */
 294 };
 295
 296 #ifdef _KERNEL
 297 /* Standard initialization structure beginning */
 298 struct cryptoini {
 299         int             cri_alg;        /* Algorithm to use */
 300         int             cri_klen;       /* Key length, in bits */
 301         int             cri_mlen;       /* Number of bytes we want from the
 302                                            entire hash. 0 means all. */
 303         caddr_t         cri_key;        /* key to use */
 304         u_int8_t        cri_iv[EALG_MAX_BLOCK_LEN];     /* IV to use */
 305         struct cryptoini *cri_next;
 306 };
 307
 308 /* Describe boundaries of a single crypto operation */
 309 struct cryptodesc {
 310         int             crd_skip;       /* How many bytes to ignore from start */
 311         int             crd_len;        /* How many bytes to process */
 312         int             crd_inject;     /* Where to inject results, if applicable */
 313         int             crd_flags;
 314
 315 #define CRD_F_ENCRYPT           0x01    /* Set when doing encryption */
 316 #define CRD_F_IV_PRESENT        0x02    /* When encrypting, IV is already in
 317                                            place, so don't copy. */
 318 #define CRD_F_IV_EXPLICIT       0x04    /* IV explicitly provided */
 319 #define CRD_F_DSA_SHA_NEEDED    0x08    /* Compute SHA-1 of buffer for DSA */
 320 #define CRD_F_COMP              0x0f    /* Set when doing compression */
 321 #define CRD_F_KEY_EXPLICIT      0x10    /* Key explicitly provided */
 322
 323         struct cryptoini        CRD_INI; /* Initialization/context data */
 324 #define crd_iv          CRD_INI.cri_iv
 325 #define crd_key         CRD_INI.cri_key
 326 #define crd_alg         CRD_INI.cri_alg
 327 #define crd_klen        CRD_INI.cri_klen
 328
 329         struct cryptodesc *crd_next;
 330 };
 331
 332 /* Structure describing complete operation */
 333 struct cryptop {
 334         TAILQ_ENTRY(cryptop) crp_next;
 335
 336         u_int64_t       crp_sid;        /* Session ID */
 337         int             crp_ilen;       /* Input data total length */
 338         int             crp_olen;       /* Result total length */
 339
 340         int             crp_etype;      /*
 341                                          * Error type (zero means no error).
 342                                          * All error codes except EAGAIN
 343                                          * indicate possible data corruption (as in,
 344                                          * the data have been touched). On all
 345                                          * errors, the crp_sid may have changed
 346                                          * (reset to a new one), so the caller
 347                                          * should always check and use the new
 348                                          * value on future requests.
 349                                          */
 350         int             crp_flags;
 351
 352 #define CRYPTO_F_IMBUF  0x0001  /* Input/output are mbuf chains */
 353 #define CRYPTO_F_IOV    0x0002  /* Input/output are uio */
 354 #define CRYPTO_F_REL    0x0004  /* Must return data in same place */
 355 #define CRYPTO_F_BATCH  0x0008  /* Batch op if possible */
 356 #define CRYPTO_F_CBIMM  0x0010  /* Do callback immediately */
 357 #define CRYPTO_F_DONE   0x0020  /* Operation completed */
 358 #define CRYPTO_F_CBIFSYNC       0x0040  /* Do CBIMM if op is synchronous */
 359
 360         caddr_t         crp_buf;        /* Data to be processed */
 361         caddr_t         crp_opaque;     /* Opaque pointer, passed along */
 362         struct cryptodesc *crp_desc;    /* Linked list of processing descriptors */
 363
 364         int (*crp_callback)(struct cryptop *); /* Callback function */
 365
 366         struct timespec crp_tstamp;     /* performance time stamp */
 367
 368         caddr_t         crp_mac;
 369 };
 370
 371 #define CRYPTO_BUF_CONTIG       0x0
 372 #define CRYPTO_BUF_IOV          0x1
 373 #define CRYPTO_BUF_MBUF         0x2
 374
 375 #define CRYPTO_OP_DECRYPT       0x0
 376 #define CRYPTO_OP_ENCRYPT       0x1
 377
 378 /*
 379  * Hints passed to process methods.
 380  */
 381 #define CRYPTO_HINT_MORE        0x1     /* more ops coming shortly */
 382
 383 struct cryptkop {
 384         TAILQ_ENTRY(cryptkop) krp_next;
 385
 386         u_int           krp_op;         /* ie. CRK_MOD_EXP or other */
 387         u_int           krp_status;     /* return status */
 388         u_short         krp_iparams;    /* # of input parameters */
 389         u_short         krp_oparams;    /* # of output parameters */
 390         u_int           krp_crid;       /* desired device, etc. */
 391         u_int32_t       krp_hid;
 392         struct crparam  krp_param[CRK_MAXPARAM];        /* kvm */
 393         int             (*krp_callback)(struct cryptkop *);
 394 };
 395
 396 /*
 397  * Session ids are 64 bits.  The lower 32 bits contain a "local id" which
 398  * is a driver-private session identifier.  The upper 32 bits contain a
 399  * "hardware id" used by the core crypto code to identify the driver and
 400  * a copy of the driver's capabilities that can be used by client code to
 401  * optimize operation.
 402  */
 403 #define CRYPTO_SESID2HID(_sid)  (((_sid) >> 32) & 0x00ffffff)
 404 #define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 32) & 0xff000000)
 405 #define CRYPTO_SESID2LID(_sid)  (((u_int32_t) (_sid)) & 0xffffffff)
 406
 407 MALLOC_DECLARE(M_CRYPTO_DATA);
 408
 409 extern  int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
 410 extern  int crypto_freesession(u_int64_t sid);
 411 #define CRYPTOCAP_F_HARDWARE    CRYPTO_FLAG_HARDWARE
 412 #define CRYPTOCAP_F_SOFTWARE    CRYPTO_FLAG_SOFTWARE
 413 #define CRYPTOCAP_F_SYNC        0x04000000      /* operates synchronously */
 414 #define CRYPTOCAP_F_SMP         0x08000000      /* SMP dispatch ok */
 415 extern  int32_t crypto_get_driverid(device_t dev, int flags);
 416 extern  int crypto_find_driver(const char *);
 417 extern  device_t crypto_find_device_byhid(int hid);
 418 extern  int crypto_getcaps(int hid);
 419 extern  int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
 420             u_int32_t flags);
 421 extern  int crypto_kregister(u_int32_t, int, u_int32_t);
 422 extern  int crypto_unregister(u_int32_t driverid, int alg);
 423 extern  int crypto_unregister_all(u_int32_t driverid);
 424 extern  int crypto_dispatch(struct cryptop *crp);
 425 extern  int crypto_kdispatch(struct cryptkop *);
 426 #define CRYPTO_SYMQ     0x1
 427 #define CRYPTO_ASYMQ    0x2
 428 extern  int crypto_unblock(u_int32_t, int);
 429 extern  void crypto_done(struct cryptop *crp);
 430 extern  void crypto_kdone(struct cryptkop *);
 431 extern  int crypto_getfeat(int *);
 432
 433 extern  void crypto_freereq(struct cryptop *crp);
 434 extern  struct cryptop *crypto_getreq(int num);
 435
 436 extern  int crypto_usercrypto;          /* userland may do crypto requests */
 437 extern  int crypto_userasymcrypto;      /* userland may do asym crypto reqs */
 438 extern  int crypto_devallowsoft;        /* only use hardware crypto */
 439
 440 /*
 441  * Crypto-related utility routines used mainly by drivers.
 442  *
 443  * XXX these don't really belong here; but for now they're
 444  *     kept apart from the rest of the system.
 445  */
 446 struct uio;
 447 extern  void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
 448 extern  void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
 449 extern  struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
 450 extern  int cuio_apply(struct uio *uio, int off, int len,
 451             int (*f)(void *, void *, u_int), void *arg);
 452
 453 extern  void crypto_copyback(int flags, caddr_t buf, int off, int size,
 454             caddr_t in);
 455 extern  void crypto_copydata(int flags, caddr_t buf, int off, int size,
 456             caddr_t out);
 457 extern  int crypto_apply(int flags, caddr_t buf, int off, int len,
 458             int (*f)(void *, void *, u_int), void *arg);
 459 #endif /* _KERNEL */
 460 #endif /* _CRYPTO_CRYPTO_H_ */