The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/cryptodev.h

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    1 /*      $FreeBSD: releng/8.0/sys/opencrypto/cryptodev.h 169425 2007-05-09 19:37:02Z gnn $       */
    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 
   61 /* Some initial values */
   62 #define CRYPTO_DRIVERS_INITIAL  4
   63 #define CRYPTO_SW_SESSIONS      32
   64 
   65 /* Hash values */
   66 #define NULL_HASH_LEN           16
   67 #define MD5_HASH_LEN            16
   68 #define SHA1_HASH_LEN           20
   69 #define RIPEMD160_HASH_LEN      20
   70 #define SHA2_256_HASH_LEN       32
   71 #define SHA2_384_HASH_LEN       48
   72 #define SHA2_512_HASH_LEN       64
   73 #define MD5_KPDK_HASH_LEN       16
   74 #define SHA1_KPDK_HASH_LEN      20
   75 /* Maximum hash algorithm result length */
   76 #define HASH_MAX_LEN            SHA2_512_HASH_LEN /* Keep this updated */
   77 
   78 /* HMAC values */
   79 #define NULL_HMAC_BLOCK_LEN             64
   80 #define MD5_HMAC_BLOCK_LEN              64
   81 #define SHA1_HMAC_BLOCK_LEN             64
   82 #define RIPEMD160_HMAC_BLOCK_LEN        64
   83 #define SHA2_256_HMAC_BLOCK_LEN         64
   84 #define SHA2_384_HMAC_BLOCK_LEN         128
   85 #define SHA2_512_HMAC_BLOCK_LEN         128
   86 /* Maximum HMAC block length */
   87 #define HMAC_MAX_BLOCK_LEN              SHA2_512_HMAC_BLOCK_LEN /* Keep this updated */
   88 #define HMAC_IPAD_VAL                   0x36
   89 #define HMAC_OPAD_VAL                   0x5C
   90 
   91 /* Encryption algorithm block sizes */
   92 #define NULL_BLOCK_LEN          4
   93 #define DES_BLOCK_LEN           8
   94 #define DES3_BLOCK_LEN          8
   95 #define BLOWFISH_BLOCK_LEN      8
   96 #define SKIPJACK_BLOCK_LEN      8
   97 #define CAST128_BLOCK_LEN       8
   98 #define RIJNDAEL128_BLOCK_LEN   16
   99 #define AES_BLOCK_LEN           RIJNDAEL128_BLOCK_LEN
  100 #define CAMELLIA_BLOCK_LEN      16
  101 #define EALG_MAX_BLOCK_LEN      AES_BLOCK_LEN /* Keep this updated */
  102 
  103 #define CRYPTO_ALGORITHM_MIN    1
  104 #define CRYPTO_DES_CBC          1
  105 #define CRYPTO_3DES_CBC         2
  106 #define CRYPTO_BLF_CBC          3
  107 #define CRYPTO_CAST_CBC         4
  108 #define CRYPTO_SKIPJACK_CBC     5
  109 #define CRYPTO_MD5_HMAC         6
  110 #define CRYPTO_SHA1_HMAC        7
  111 #define CRYPTO_RIPEMD160_HMAC   8
  112 #define CRYPTO_MD5_KPDK         9
  113 #define CRYPTO_SHA1_KPDK        10
  114 #define CRYPTO_RIJNDAEL128_CBC  11 /* 128 bit blocksize */
  115 #define CRYPTO_AES_CBC          11 /* 128 bit blocksize -- the same as above */
  116 #define CRYPTO_ARC4             12
  117 #define CRYPTO_MD5              13
  118 #define CRYPTO_SHA1             14
  119 #define CRYPTO_NULL_HMAC        15
  120 #define CRYPTO_NULL_CBC         16
  121 #define CRYPTO_DEFLATE_COMP     17 /* Deflate compression algorithm */
  122 #define CRYPTO_SHA2_256_HMAC    18
  123 #define CRYPTO_SHA2_384_HMAC    19
  124 #define CRYPTO_SHA2_512_HMAC    20
  125 #define CRYPTO_CAMELLIA_CBC     21
  126 #define CRYPTO_ALGORITHM_MAX    21 /* Keep updated - see below */
  127 
  128 /* Algorithm flags */
  129 #define CRYPTO_ALG_FLAG_SUPPORTED       0x01 /* Algorithm is supported */
  130 #define CRYPTO_ALG_FLAG_RNG_ENABLE      0x02 /* Has HW RNG for DH/DSA */
  131 #define CRYPTO_ALG_FLAG_DSA_SHA         0x04 /* Can do SHA on msg */
  132 
  133 /*
  134  * Crypto driver/device flags.  They can set in the crid
  135  * parameter when creating a session or submitting a key
  136  * op to affect the device/driver assigned.  If neither
  137  * of these are specified then the crid is assumed to hold
  138  * the driver id of an existing (and suitable) device that
  139  * must be used to satisfy the request.
  140  */
  141 #define CRYPTO_FLAG_HARDWARE    0x01000000      /* hardware accelerated */
  142 #define CRYPTO_FLAG_SOFTWARE    0x02000000      /* software implementation */
  143 
  144 /* NB: deprecated */
  145 struct session_op {
  146         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
  147         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
  148 
  149         u_int32_t       keylen;         /* cipher key */
  150         caddr_t         key;
  151         int             mackeylen;      /* mac key */
  152         caddr_t         mackey;
  153 
  154         u_int32_t       ses;            /* returns: session # */ 
  155 };
  156 
  157 struct session2_op {
  158         u_int32_t       cipher;         /* ie. CRYPTO_DES_CBC */
  159         u_int32_t       mac;            /* ie. CRYPTO_MD5_HMAC */
  160 
  161         u_int32_t       keylen;         /* cipher key */
  162         caddr_t         key;
  163         int             mackeylen;      /* mac key */
  164         caddr_t         mackey;
  165 
  166         u_int32_t       ses;            /* returns: session # */ 
  167         int             crid;           /* driver id + flags (rw) */
  168         int             pad[4];         /* for future expansion */
  169 };
  170 
  171 struct crypt_op {
  172         u_int32_t       ses;
  173         u_int16_t       op;             /* i.e. COP_ENCRYPT */
  174 #define COP_ENCRYPT     1
  175 #define COP_DECRYPT     2
  176         u_int16_t       flags;
  177 #define COP_F_BATCH     0x0008          /* Batch op if possible */
  178         u_int           len;
  179         caddr_t         src, dst;       /* become iov[] inside kernel */
  180         caddr_t         mac;            /* must be big enough for chosen MAC */
  181         caddr_t         iv;
  182 };
  183 
  184 /*
  185  * Parameters for looking up a crypto driver/device by
  186  * device name or by id.  The latter are returned for
  187  * created sessions (crid) and completed key operations.
  188  */
  189 struct crypt_find_op {
  190         int             crid;           /* driver id + flags */
  191         char            name[32];       /* device/driver name */
  192 };
  193 
  194 /* bignum parameter, in packed bytes, ... */
  195 struct crparam {
  196         caddr_t         crp_p;
  197         u_int           crp_nbits;
  198 };
  199 
  200 #define CRK_MAXPARAM    8
  201 
  202 struct crypt_kop {
  203         u_int           crk_op;         /* ie. CRK_MOD_EXP or other */
  204         u_int           crk_status;     /* return status */
  205         u_short         crk_iparams;    /* # of input parameters */
  206         u_short         crk_oparams;    /* # of output parameters */
  207         u_int           crk_crid;       /* NB: only used by CIOCKEY2 (rw) */
  208         struct crparam  crk_param[CRK_MAXPARAM];
  209 };
  210 #define CRK_ALGORITM_MIN        0
  211 #define CRK_MOD_EXP             0
  212 #define CRK_MOD_EXP_CRT         1
  213 #define CRK_DSA_SIGN            2
  214 #define CRK_DSA_VERIFY          3
  215 #define CRK_DH_COMPUTE_KEY      4
  216 #define CRK_ALGORITHM_MAX       4 /* Keep updated - see below */
  217 
  218 #define CRF_MOD_EXP             (1 << CRK_MOD_EXP)
  219 #define CRF_MOD_EXP_CRT         (1 << CRK_MOD_EXP_CRT)
  220 #define CRF_DSA_SIGN            (1 << CRK_DSA_SIGN)
  221 #define CRF_DSA_VERIFY          (1 << CRK_DSA_VERIFY)
  222 #define CRF_DH_COMPUTE_KEY      (1 << CRK_DH_COMPUTE_KEY)
  223 
  224 /*
  225  * done against open of /dev/crypto, to get a cloned descriptor.
  226  * Please use F_SETFD against the cloned descriptor.
  227  */
  228 #define CRIOGET         _IOWR('c', 100, u_int32_t)
  229 #define CRIOASYMFEAT    CIOCASYMFEAT
  230 #define CRIOFINDDEV     CIOCFINDDEV
  231 
  232 /* the following are done against the cloned descriptor */
  233 #define CIOCGSESSION    _IOWR('c', 101, struct session_op)
  234 #define CIOCFSESSION    _IOW('c', 102, u_int32_t)
  235 #define CIOCCRYPT       _IOWR('c', 103, struct crypt_op)
  236 #define CIOCKEY         _IOWR('c', 104, struct crypt_kop)
  237 #define CIOCASYMFEAT    _IOR('c', 105, u_int32_t)
  238 #define CIOCGSESSION2   _IOWR('c', 106, struct session2_op)
  239 #define CIOCKEY2        _IOWR('c', 107, struct crypt_kop)
  240 #define CIOCFINDDEV     _IOWR('c', 108, struct crypt_find_op)
  241 
  242 struct cryptotstat {
  243         struct timespec acc;            /* total accumulated time */
  244         struct timespec min;            /* min time */
  245         struct timespec max;            /* max time */
  246         u_int32_t       count;          /* number of observations */
  247 };
  248 
  249 struct cryptostats {
  250         u_int32_t       cs_ops;         /* symmetric crypto ops submitted */
  251         u_int32_t       cs_errs;        /* symmetric crypto ops that failed */
  252         u_int32_t       cs_kops;        /* asymetric/key ops submitted */
  253         u_int32_t       cs_kerrs;       /* asymetric/key ops that failed */
  254         u_int32_t       cs_intrs;       /* crypto swi thread activations */
  255         u_int32_t       cs_rets;        /* crypto return thread activations */
  256         u_int32_t       cs_blocks;      /* symmetric op driver block */
  257         u_int32_t       cs_kblocks;     /* symmetric op driver block */
  258         /*
  259          * When CRYPTO_TIMING is defined at compile time and the
  260          * sysctl debug.crypto is set to 1, the crypto system will
  261          * accumulate statistics about how long it takes to process
  262          * crypto requests at various points during processing.
  263          */
  264         struct cryptotstat cs_invoke;   /* crypto_dipsatch -> crypto_invoke */
  265         struct cryptotstat cs_done;     /* crypto_invoke -> crypto_done */
  266         struct cryptotstat cs_cb;       /* crypto_done -> callback */
  267         struct cryptotstat cs_finis;    /* callback -> callback return */
  268 };
  269 
  270 #ifdef _KERNEL
  271 /* Standard initialization structure beginning */
  272 struct cryptoini {
  273         int             cri_alg;        /* Algorithm to use */
  274         int             cri_klen;       /* Key length, in bits */
  275         int             cri_mlen;       /* Number of bytes we want from the
  276                                            entire hash. 0 means all. */
  277         caddr_t         cri_key;        /* key to use */
  278         u_int8_t        cri_iv[EALG_MAX_BLOCK_LEN];     /* IV to use */
  279         struct cryptoini *cri_next;
  280 };
  281 
  282 /* Describe boundaries of a single crypto operation */
  283 struct cryptodesc {
  284         int             crd_skip;       /* How many bytes to ignore from start */
  285         int             crd_len;        /* How many bytes to process */
  286         int             crd_inject;     /* Where to inject results, if applicable */
  287         int             crd_flags;
  288 
  289 #define CRD_F_ENCRYPT           0x01    /* Set when doing encryption */
  290 #define CRD_F_IV_PRESENT        0x02    /* When encrypting, IV is already in
  291                                            place, so don't copy. */
  292 #define CRD_F_IV_EXPLICIT       0x04    /* IV explicitly provided */
  293 #define CRD_F_DSA_SHA_NEEDED    0x08    /* Compute SHA-1 of buffer for DSA */
  294 #define CRD_F_KEY_EXPLICIT      0x10    /* Key explicitly provided */
  295 #define CRD_F_COMP              0x0f    /* Set when doing compression */
  296 
  297         struct cryptoini        CRD_INI; /* Initialization/context data */
  298 #define crd_iv          CRD_INI.cri_iv
  299 #define crd_key         CRD_INI.cri_key
  300 #define crd_alg         CRD_INI.cri_alg
  301 #define crd_klen        CRD_INI.cri_klen
  302 
  303         struct cryptodesc *crd_next;
  304 };
  305 
  306 /* Structure describing complete operation */
  307 struct cryptop {
  308         TAILQ_ENTRY(cryptop) crp_next;
  309 
  310         u_int64_t       crp_sid;        /* Session ID */
  311         int             crp_ilen;       /* Input data total length */
  312         int             crp_olen;       /* Result total length */
  313 
  314         int             crp_etype;      /*
  315                                          * Error type (zero means no error).
  316                                          * All error codes except EAGAIN
  317                                          * indicate possible data corruption (as in,
  318                                          * the data have been touched). On all
  319                                          * errors, the crp_sid may have changed
  320                                          * (reset to a new one), so the caller
  321                                          * should always check and use the new
  322                                          * value on future requests.
  323                                          */
  324         int             crp_flags;
  325 
  326 #define CRYPTO_F_IMBUF          0x0001  /* Input/output are mbuf chains */
  327 #define CRYPTO_F_IOV            0x0002  /* Input/output are uio */
  328 #define CRYPTO_F_REL            0x0004  /* Must return data in same place */
  329 #define CRYPTO_F_BATCH          0x0008  /* Batch op if possible */
  330 #define CRYPTO_F_CBIMM          0x0010  /* Do callback immediately */
  331 #define CRYPTO_F_DONE           0x0020  /* Operation completed */
  332 #define CRYPTO_F_CBIFSYNC       0x0040  /* Do CBIMM if op is synchronous */
  333 
  334         caddr_t         crp_buf;        /* Data to be processed */
  335         caddr_t         crp_opaque;     /* Opaque pointer, passed along */
  336         struct cryptodesc *crp_desc;    /* Linked list of processing descriptors */
  337 
  338         int (*crp_callback)(struct cryptop *); /* Callback function */
  339 
  340         struct bintime  crp_tstamp;     /* performance time stamp */
  341 };
  342 
  343 #define CRYPTO_BUF_CONTIG       0x0
  344 #define CRYPTO_BUF_IOV          0x1
  345 #define CRYPTO_BUF_MBUF         0x2
  346 
  347 #define CRYPTO_OP_DECRYPT       0x0
  348 #define CRYPTO_OP_ENCRYPT       0x1
  349 
  350 /*
  351  * Hints passed to process methods.
  352  */
  353 #define CRYPTO_HINT_MORE        0x1     /* more ops coming shortly */
  354 
  355 struct cryptkop {
  356         TAILQ_ENTRY(cryptkop) krp_next;
  357 
  358         u_int           krp_op;         /* ie. CRK_MOD_EXP or other */
  359         u_int           krp_status;     /* return status */
  360         u_short         krp_iparams;    /* # of input parameters */
  361         u_short         krp_oparams;    /* # of output parameters */
  362         u_int           krp_crid;       /* desired device, etc. */
  363         u_int32_t       krp_hid;
  364         struct crparam  krp_param[CRK_MAXPARAM];        /* kvm */
  365         int             (*krp_callback)(struct cryptkop *);
  366 };
  367 
  368 /*
  369  * Session ids are 64 bits.  The lower 32 bits contain a "local id" which
  370  * is a driver-private session identifier.  The upper 32 bits contain a
  371  * "hardware id" used by the core crypto code to identify the driver and
  372  * a copy of the driver's capabilities that can be used by client code to
  373  * optimize operation.
  374  */
  375 #define CRYPTO_SESID2HID(_sid)  (((_sid) >> 32) & 0x00ffffff)
  376 #define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 32) & 0xff000000)
  377 #define CRYPTO_SESID2LID(_sid)  (((u_int32_t) (_sid)) & 0xffffffff)
  378 
  379 MALLOC_DECLARE(M_CRYPTO_DATA);
  380 
  381 extern  int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
  382 extern  int crypto_freesession(u_int64_t sid);
  383 #define CRYPTOCAP_F_HARDWARE    CRYPTO_FLAG_HARDWARE
  384 #define CRYPTOCAP_F_SOFTWARE    CRYPTO_FLAG_SOFTWARE
  385 #define CRYPTOCAP_F_SYNC        0x04000000      /* operates synchronously */
  386 extern  int32_t crypto_get_driverid(device_t dev, int flags);
  387 extern  int crypto_find_driver(const char *);
  388 extern  device_t crypto_find_device_byhid(int hid);
  389 extern  int crypto_getcaps(int hid);
  390 extern  int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
  391             u_int32_t flags);
  392 extern  int crypto_kregister(u_int32_t, int, u_int32_t);
  393 extern  int crypto_unregister(u_int32_t driverid, int alg);
  394 extern  int crypto_unregister_all(u_int32_t driverid);
  395 extern  int crypto_dispatch(struct cryptop *crp);
  396 extern  int crypto_kdispatch(struct cryptkop *);
  397 #define CRYPTO_SYMQ     0x1
  398 #define CRYPTO_ASYMQ    0x2
  399 extern  int crypto_unblock(u_int32_t, int);
  400 extern  void crypto_done(struct cryptop *crp);
  401 extern  void crypto_kdone(struct cryptkop *);
  402 extern  int crypto_getfeat(int *);
  403 
  404 extern  void crypto_freereq(struct cryptop *crp);
  405 extern  struct cryptop *crypto_getreq(int num);
  406 
  407 extern  int crypto_usercrypto;          /* userland may do crypto requests */
  408 extern  int crypto_userasymcrypto;      /* userland may do asym crypto reqs */
  409 extern  int crypto_devallowsoft;        /* only use hardware crypto */
  410 
  411 /*
  412  * Crypto-related utility routines used mainly by drivers.
  413  *
  414  * XXX these don't really belong here; but for now they're
  415  *     kept apart from the rest of the system.
  416  */
  417 struct uio;
  418 extern  void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
  419 extern  void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
  420 extern  struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
  421 extern  int cuio_apply(struct uio *uio, int off, int len,
  422             int (*f)(void *, void *, u_int), void *arg);
  423 
  424 extern  void crypto_copyback(int flags, caddr_t buf, int off, int size,
  425             caddr_t in);
  426 extern  void crypto_copydata(int flags, caddr_t buf, int off, int size,
  427             caddr_t out);
  428 extern  int crypto_apply(int flags, caddr_t buf, int off, int len,
  429             int (*f)(void *, void *, u_int), void *arg);
  430 #endif /* _KERNEL */
  431 #endif /* _CRYPTO_CRYPTO_H_ */

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