sys/opencrypto/cryptodev.h

   1 /*      $FreeBSD: src/sys/opencrypto/cryptodev.h,v 1.2.2.5 2003/06/03 00:09:02 sam Exp $        */
   2 /*      $DragonFly: src/sys/opencrypto/cryptodev.h,v 1.3 2007/12/04 09:11:12 hasso Exp $        */
   3 /*      $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $     */
   4
   5 /*
   6  * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
   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
  61 /* Some initial values */
  62 #define CRYPTO_DRIVERS_INITIAL  4
  63 #define CRYPTO_SW_SESSIONS      32
  64
  65 /* HMAC values */
  66 #define HMAC_BLOCK_LEN          64
  67 #define HMAC_IPAD_VAL           0x36
  68 #define HMAC_OPAD_VAL           0x5C
  69
  70 /* Encryption algorithm block sizes */
  71 #define DES_BLOCK_LEN           8
  72 #define DES3_BLOCK_LEN          8
  73 #define BLOWFISH_BLOCK_LEN      8
  74 #define SKIPJACK_BLOCK_LEN      8
  75 #define CAST128_BLOCK_LEN       8
  76 #define RIJNDAEL128_BLOCK_LEN   16
  77 #define EALG_MAX_BLOCK_LEN      16 /* Keep this updated */
  78
  79 /* Maximum hash algorithm result length */
  80 #define AALG_MAX_RESULT_LEN     64 /* Keep this updated */
  81
  82 #define CRYPTO_ALGORITHM_MIN    1
  83 #define CRYPTO_DES_CBC          1
  84 #define CRYPTO_3DES_CBC         2
  85 #define CRYPTO_BLF_CBC          3
  86 #define CRYPTO_CAST_CBC         4
  87 #define CRYPTO_SKIPJACK_CBC     5
  88 #define CRYPTO_MD5_HMAC         6
  89 #define CRYPTO_SHA1_HMAC        7
  90 #define CRYPTO_RIPEMD160_HMAC   8
  91 #define CRYPTO_MD5_KPDK         9
  92 #define CRYPTO_SHA1_KPDK        10
  93 #define CRYPTO_RIJNDAEL128_CBC  11 /* 128 bit blocksize */
  94 #define CRYPTO_AES_CBC          11 /* 128 bit blocksize -- the same as above */
  95 #define CRYPTO_ARC4             12
  96 #define CRYPTO_MD5              13
  97 #define CRYPTO_SHA1             14
  98 #define CRYPTO_SHA2_HMAC        15
  99 #define CRYPTO_NULL_HMAC        16
 100 #define CRYPTO_NULL_CBC         17
 101 #define CRYPTO_DEFLATE_COMP     18 /* Deflate compression algorithm */
 102 #define CRYPTO_ALGORITHM_MAX    18 /* Keep updated - see below */
 103
 104 /* Algorithm flags */
 105 #define CRYPTO_ALG_FLAG_SUPPORTED       0x01 /* Algorithm is supported */
 106 #define CRYPTO_ALG_FLAG_RNG_ENABLE      0x02 /* Has HW RNG for DH/DSA */
 107 #define CRYPTO_ALG_FLAG_DSA_SHA         0x04 /* Can do SHA on msg */
 108
 109 struct session_op {
 110         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
 111         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
 112
 113         u_int32_t       keylen;         /* cipher key */
 114         caddr_t         key;
 115         int             mackeylen;      /* mac key */
 116         caddr_t         mackey;
 117
 118         u_int32_t       ses;            /* returns: session # */
 119 };
 120
 121 struct crypt_op {
 122         u_int32_t       ses;
 123         u_int16_t       op;             /* i.e. COP_ENCRYPT */
 124 #define COP_ENCRYPT     1
 125 #define COP_DECRYPT     2
 126         u_int16_t       flags;
 127 #define COP_F_BATCH     0x0008          /* Dispatch as quickly as possible */
 128         u_int           len;
 129         caddr_t         src, dst;       /* become iov[] inside kernel */
 130         caddr_t         mac;            /* must be big enough for chosen MAC */
 131         caddr_t         iv;
 132 };
 133
 134 #define CRYPTO_MAX_MAC_LEN      20
 135
 136 /* bignum parameter, in packed bytes, ... */
 137 struct crparam {
 138         caddr_t         crp_p;
 139         u_int           crp_nbits;
 140 };
 141
 142 #define CRK_MAXPARAM    8
 143
 144 struct crypt_kop {
 145         u_int           crk_op;         /* ie. CRK_MOD_EXP or other */
 146         u_int           crk_status;     /* return status */
 147         u_short         crk_iparams;    /* # of input parameters */
 148         u_short         crk_oparams;    /* # of output parameters */
 149         u_int           crk_pad1;
 150         struct crparam  crk_param[CRK_MAXPARAM];
 151 };
 152 #define CRK_ALGORITM_MIN        0
 153 #define CRK_MOD_EXP             0
 154 #define CRK_MOD_EXP_CRT         1
 155 #define CRK_DSA_SIGN            2
 156 #define CRK_DSA_VERIFY          3
 157 #define CRK_DH_COMPUTE_KEY      4
 158 #define CRK_ALGORITHM_MAX       4 /* Keep updated - see below */
 159
 160 #define CRF_MOD_EXP             (1 << CRK_MOD_EXP)
 161 #define CRF_MOD_EXP_CRT         (1 << CRK_MOD_EXP_CRT)
 162 #define CRF_DSA_SIGN            (1 << CRK_DSA_SIGN)
 163 #define CRF_DSA_VERIFY          (1 << CRK_DSA_VERIFY)
 164 #define CRF_DH_COMPUTE_KEY      (1 << CRK_DH_COMPUTE_KEY)
 165
 166 /*
 167  * done against open of /dev/crypto, to get a cloned descriptor.
 168  * Please use F_SETFD against the cloned descriptor.
 169  */
 170 #define CRIOGET         _IOWR('c', 100, u_int32_t)
 171
 172 /* the following are done against the cloned descriptor */
 173 #define CIOCGSESSION    _IOWR('c', 101, struct session_op)
 174 #define CIOCFSESSION    _IOW('c', 102, u_int32_t)
 175 #define CIOCCRYPT       _IOWR('c', 103, struct crypt_op)
 176 #define CIOCKEY         _IOWR('c', 104, struct crypt_kop)
 177
 178 #define CIOCASYMFEAT    _IOR('c', 105, u_int32_t)
 179
 180 struct cryptotstat {
 181         struct timespec acc;            /* total accumulated time */
 182         struct timespec min;            /* max time */
 183         struct timespec max;            /* max time */
 184         u_int32_t       count;          /* number of observations */
 185 };
 186
 187 struct cryptostats {
 188         u_int32_t       cs_ops;         /* symmetric crypto ops submitted */
 189         u_int32_t       cs_errs;        /* symmetric crypto ops that failed */
 190         u_int32_t       cs_kops;        /* asymetric/key ops submitted */
 191         u_int32_t       cs_kerrs;       /* asymetric/key ops that failed */
 192         u_int32_t       cs_intrs;       /* crypto swi thread activations */
 193         u_int32_t       cs_rets;        /* crypto return thread activations */
 194         u_int32_t       cs_blocks;      /* symmetric op driver block */
 195         u_int32_t       cs_kblocks;     /* symmetric op driver block */
 196         /*
 197          * When CRYPTO_TIMING is defined at compile time and the
 198          * sysctl debug.crypto is set to 1, the crypto system will
 199          * accumulate statistics about how long it takes to process
 200          * crypto requests at various points during processing.
 201          */
 202         struct cryptotstat cs_invoke;   /* crypto_dipsatch -> crypto_invoke */
 203         struct cryptotstat cs_done;     /* crypto_invoke -> crypto_done */
 204         struct cryptotstat cs_cb;       /* crypto_done -> callback */
 205         struct cryptotstat cs_finis;    /* callback -> callback return */
 206 };
 207
 208 #ifdef _KERNEL
 209 /* Standard initialization structure beginning */
 210 struct cryptoini {
 211         int             cri_alg;        /* Algorithm to use */
 212         int             cri_klen;       /* Key length, in bits */
 213         int             cri_rnd;        /* Algorithm rounds, where relevant */
 214         caddr_t         cri_key;        /* key to use */
 215         u_int8_t        cri_iv[EALG_MAX_BLOCK_LEN];     /* IV to use */
 216         struct cryptoini *cri_next;
 217 };
 218
 219 /* Describe boundaries of a single crypto operation */
 220 struct cryptodesc {
 221         int             crd_skip;       /* How many bytes to ignore from start */
 222         int             crd_len;        /* How many bytes to process */
 223         int             crd_inject;     /* Where to inject results, if applicable */
 224         int             crd_flags;
 225
 226 #define CRD_F_ENCRYPT           0x01    /* Set when doing encryption */
 227 #define CRD_F_IV_PRESENT        0x02    /* When encrypting, IV is already in
 228                                            place, so don't copy. */
 229 #define CRD_F_IV_EXPLICIT       0x04    /* IV explicitly provided */
 230 #define CRD_F_DSA_SHA_NEEDED    0x08    /* Compute SHA-1 of buffer for DSA */
 231 #define CRD_F_COMP              0x0f    /* Set when doing compression */
 232 #define CRD_F_KEY_EXPLICIT      0x10    /* Key explicitly provided */
 233
 234         struct cryptoini        CRD_INI; /* Initialization/context data */
 235 #define crd_iv          CRD_INI.cri_iv
 236 #define crd_key         CRD_INI.cri_key
 237 #define crd_rnd         CRD_INI.cri_rnd
 238 #define crd_alg         CRD_INI.cri_alg
 239 #define crd_klen        CRD_INI.cri_klen
 240
 241         struct cryptodesc *crd_next;
 242 };
 243
 244 /* Structure describing complete operation */
 245 struct cryptop {
 246         TAILQ_ENTRY(cryptop) crp_next;
 247
 248         u_int64_t       crp_sid;        /* Session ID */
 249         int             crp_ilen;       /* Input data total length */
 250         int             crp_olen;       /* Result total length */
 251
 252         int             crp_etype;      /*
 253                                          * Error type (zero means no error).
 254                                          * All error codes except EAGAIN
 255                                          * indicate possible data corruption (as in,
 256                                          * the data have been touched). On all
 257                                          * errors, the crp_sid may have changed
 258                                          * (reset to a new one), so the caller
 259                                          * should always check and use the new
 260                                          * value on future requests.
 261                                          */
 262         int             crp_flags;
 263
 264 #define CRYPTO_F_IMBUF  0x0001  /* Input/output are mbuf chains, otherwise contig */
 265 #define CRYPTO_F_IOV    0x0002  /* Input/output are uio */
 266 #define CRYPTO_F_REL    0x0004  /* Must return data in same place */
 267 #define CRYPTO_F_BATCH  0x0008  /* Batch op if possible possible */
 268 #define CRYPTO_F_CBIMM  0x0010  /* Do callback immediately */
 269 #define CRYPTO_F_DONE   0x0020  /* Operation completed */
 270
 271         caddr_t         crp_buf;        /* Data to be processed */
 272         caddr_t         crp_opaque;     /* Opaque pointer, passed along */
 273         struct cryptodesc *crp_desc;    /* Linked list of processing descriptors */
 274
 275         int (*crp_callback)(struct cryptop *); /* Callback function */
 276
 277         caddr_t         crp_mac;
 278         struct timespec crp_tstamp;     /* performance time stamp */
 279 };
 280
 281 #define CRYPTO_BUF_CONTIG       0x0
 282 #define CRYPTO_BUF_IOV          0x1
 283 #define CRYPTO_BUF_MBUF         0x2
 284
 285 #define CRYPTO_OP_DECRYPT       0x0
 286 #define CRYPTO_OP_ENCRYPT       0x1
 287
 288 /*
 289  * Hints passed to process methods.
 290  */
 291 #define CRYPTO_HINT_MORE        0x1     /* more ops coming shortly */
 292
 293 struct cryptkop {
 294         TAILQ_ENTRY(cryptkop) krp_next;
 295
 296         u_int           krp_op;         /* ie. CRK_MOD_EXP or other */
 297         u_int           krp_status;     /* return status */
 298         u_short         krp_iparams;    /* # of input parameters */
 299         u_short         krp_oparams;    /* # of output parameters */
 300         u_int32_t       krp_hid;
 301         struct crparam  krp_param[CRK_MAXPARAM];        /* kvm */
 302         int             (*krp_callback)(struct cryptkop *);
 303 };
 304
 305 /* Crypto capabilities structure */
 306 struct cryptocap {
 307         u_int32_t       cc_sessions;
 308
 309         /*
 310          * Largest possible operator length (in bits) for each type of
 311          * encryption algorithm.
 312          */
 313         u_int16_t       cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
 314
 315         u_int8_t        cc_alg[CRYPTO_ALGORITHM_MAX + 1];
 316
 317         u_int8_t        cc_kalg[CRK_ALGORITHM_MAX + 1];
 318
 319         u_int8_t        cc_flags;
 320         u_int8_t        cc_qblocked;            /* symmetric q blocked */
 321         u_int8_t        cc_kqblocked;           /* asymmetric q blocked */
 322 #define CRYPTOCAP_F_CLEANUP   0x1
 323 #define CRYPTOCAP_F_SOFTWARE  0x02
 324
 325         void            *cc_arg;                /* callback argument */
 326         int             (*cc_newsession)(void*, u_int32_t*, struct cryptoini*);
 327         int             (*cc_process)(void*, struct cryptop *, int);
 328         int             (*cc_freesession)(void*, u_int64_t);
 329         void            *cc_karg;               /* callback argument */
 330         int             (*cc_kprocess) (void*, struct cryptkop *, int);
 331 };
 332
 333 MALLOC_DECLARE(M_CRYPTO_DATA);
 334
 335 extern  int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
 336 extern  int crypto_freesession(u_int64_t sid);
 337 extern  int32_t crypto_get_driverid(u_int32_t flags);
 338 extern  int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
 339             u_int32_t flags,
 340             int (*newses)(void*, u_int32_t*, struct cryptoini*),
 341             int (*freeses)(void*, u_int64_t),
 342             int (*process)(void*, struct cryptop *, int),
 343             void *arg);
 344 extern  int crypto_kregister(u_int32_t, int, u_int32_t,
 345             int (*)(void*, struct cryptkop *, int),
 346             void *arg);
 347 extern  int crypto_unregister(u_int32_t driverid, int alg);
 348 extern  int crypto_unregister_all(u_int32_t driverid);
 349 extern  int crypto_dispatch(struct cryptop *crp);
 350 extern  int crypto_kdispatch(struct cryptkop *);
 351 #define CRYPTO_SYMQ     0x1
 352 #define CRYPTO_ASYMQ    0x2
 353 extern  int crypto_unblock(u_int32_t, int);
 354 extern  void crypto_done(struct cryptop *crp);
 355 extern  void crypto_kdone(struct cryptkop *);
 356 extern  int crypto_getfeat(int *);
 357
 358 extern  void crypto_freereq(struct cryptop *crp);
 359 extern  struct cryptop *crypto_getreq(int num);
 360
 361 extern  int crypto_usercrypto;          /* userland may do crypto requests */
 362 extern  int crypto_userasymcrypto;      /* userland may do asym crypto reqs */
 363 extern  int crypto_devallowsoft;        /* only use hardware crypto */
 364
 365 /*
 366  * Crypto-related utility routines used mainly by drivers.
 367  *
 368  * XXX these don't really belong here; but for now they're
 369  *     kept apart from the rest of the system.
 370  */
 371 struct mbuf;
 372 struct  mbuf    *m_getptr(struct mbuf *, int, int *);
 373
 374 struct uio;
 375 extern  void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
 376 extern  void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
 377 extern  struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
 378 #endif /* _KERNEL */
 379 #endif /* _CRYPTO_CRYPTO_H_ */