sys/opencrypto/cryptodev.c

   1 /*      $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2001 Theo de Raadt
   5  * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
   6  * Copyright (c) 2014 The FreeBSD Foundation
   7  * All rights reserved.
   8  *
   9  * Portions of this software were developed by John-Mark Gurney
  10  * under sponsorship of the FreeBSD Foundation and
  11  * Rubicon Communications, LLC (Netgate).
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *   notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *   notice, this list of conditions and the following disclaimer in the
  21  *   documentation and/or other materials provided with the distribution.
  22  * 3. The name of the author may not be used to endorse or promote products
  23  *   derived from this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Effort sponsored in part by the Defense Advanced Research Projects
  37  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  38  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
  39  */
  40
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/malloc.h>
  47 #include <sys/mbuf.h>
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/file.h>
  52 #include <sys/filedesc.h>
  53 #include <sys/errno.h>
  54 #include <sys/uio.h>
  55 #include <sys/random.h>
  56 #include <sys/conf.h>
  57 #include <sys/kernel.h>
  58 #include <sys/module.h>
  59 #include <sys/fcntl.h>
  60 #include <sys/bus.h>
  61 #include <sys/user.h>
  62 #include <sys/sdt.h>
  63
  64 #include <opencrypto/cryptodev.h>
  65 #include <opencrypto/xform.h>
  66
  67 SDT_PROVIDER_DECLARE(opencrypto);
  68
  69 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
  70
  71 #ifdef COMPAT_FREEBSD32
  72 #include <sys/mount.h>
  73 #include <compat/freebsd32/freebsd32.h>
  74
  75 struct session_op32 {
  76         u_int32_t       cipher;
  77         u_int32_t       mac;
  78         u_int32_t       keylen;
  79         u_int32_t       key;
  80         int             mackeylen;
  81         u_int32_t       mackey;
  82         u_int32_t       ses;
  83 };
  84
  85 struct session2_op32 {
  86         u_int32_t       cipher;
  87         u_int32_t       mac;
  88         u_int32_t       keylen;
  89         u_int32_t       key;
  90         int             mackeylen;
  91         u_int32_t       mackey;
  92         u_int32_t       ses;
  93         int             crid;
  94         int             pad[4];
  95 };
  96
  97 struct crypt_op32 {
  98         u_int32_t       ses;
  99         u_int16_t       op;
 100         u_int16_t       flags;
 101         u_int           len;
 102         u_int32_t       src, dst;
 103         u_int32_t       mac;
 104         u_int32_t       iv;
 105 };
 106
 107 struct crparam32 {
 108         u_int32_t       crp_p;
 109         u_int           crp_nbits;
 110 };
 111
 112 struct crypt_kop32 {
 113         u_int           crk_op;
 114         u_int           crk_status;
 115         u_short         crk_iparams;
 116         u_short         crk_oparams;
 117         u_int           crk_crid;
 118         struct crparam32        crk_param[CRK_MAXPARAM];
 119 };
 120
 121 struct cryptotstat32 {
 122         struct timespec32       acc;
 123         struct timespec32       min;
 124         struct timespec32       max;
 125         u_int32_t       count;
 126 };
 127
 128 struct cryptostats32 {
 129         u_int32_t       cs_ops;
 130         u_int32_t       cs_errs;
 131         u_int32_t       cs_kops;
 132         u_int32_t       cs_kerrs;
 133         u_int32_t       cs_intrs;
 134         u_int32_t       cs_rets;
 135         u_int32_t       cs_blocks;
 136         u_int32_t       cs_kblocks;
 137         struct cryptotstat32 cs_invoke;
 138         struct cryptotstat32 cs_done;
 139         struct cryptotstat32 cs_cb;
 140         struct cryptotstat32 cs_finis;
 141 };
 142
 143 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
 144 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
 145 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
 146 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
 147 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
 148
 149 static void
 150 session_op_from_32(const struct session_op32 *from, struct session_op *to)
 151 {
 152
 153         CP(*from, *to, cipher);
 154         CP(*from, *to, mac);
 155         CP(*from, *to, keylen);
 156         PTRIN_CP(*from, *to, key);
 157         CP(*from, *to, mackeylen);
 158         PTRIN_CP(*from, *to, mackey);
 159         CP(*from, *to, ses);
 160 }
 161
 162 static void
 163 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
 164 {
 165
 166         session_op_from_32((const struct session_op32 *)from,
 167             (struct session_op *)to);
 168         CP(*from, *to, crid);
 169 }
 170
 171 static void
 172 session_op_to_32(const struct session_op *from, struct session_op32 *to)
 173 {
 174
 175         CP(*from, *to, cipher);
 176         CP(*from, *to, mac);
 177         CP(*from, *to, keylen);
 178         PTROUT_CP(*from, *to, key);
 179         CP(*from, *to, mackeylen);
 180         PTROUT_CP(*from, *to, mackey);
 181         CP(*from, *to, ses);
 182 }
 183
 184 static void
 185 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
 186 {
 187
 188         session_op_to_32((const struct session_op *)from,
 189             (struct session_op32 *)to);
 190         CP(*from, *to, crid);
 191 }
 192
 193 static void
 194 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
 195 {
 196
 197         CP(*from, *to, ses);
 198         CP(*from, *to, op);
 199         CP(*from, *to, flags);
 200         CP(*from, *to, len);
 201         PTRIN_CP(*from, *to, src);
 202         PTRIN_CP(*from, *to, dst);
 203         PTRIN_CP(*from, *to, mac);
 204         PTRIN_CP(*from, *to, iv);
 205 }
 206
 207 static void
 208 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
 209 {
 210
 211         CP(*from, *to, ses);
 212         CP(*from, *to, op);
 213         CP(*from, *to, flags);
 214         CP(*from, *to, len);
 215         PTROUT_CP(*from, *to, src);
 216         PTROUT_CP(*from, *to, dst);
 217         PTROUT_CP(*from, *to, mac);
 218         PTROUT_CP(*from, *to, iv);
 219 }
 220
 221 static void
 222 crparam_from_32(const struct crparam32 *from, struct crparam *to)
 223 {
 224
 225         PTRIN_CP(*from, *to, crp_p);
 226         CP(*from, *to, crp_nbits);
 227 }
 228
 229 static void
 230 crparam_to_32(const struct crparam *from, struct crparam32 *to)
 231 {
 232
 233         PTROUT_CP(*from, *to, crp_p);
 234         CP(*from, *to, crp_nbits);
 235 }
 236
 237 static void
 238 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
 239 {
 240         int i;
 241
 242         CP(*from, *to, crk_op);
 243         CP(*from, *to, crk_status);
 244         CP(*from, *to, crk_iparams);
 245         CP(*from, *to, crk_oparams);
 246         CP(*from, *to, crk_crid);
 247         for (i = 0; i < CRK_MAXPARAM; i++)
 248                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
 249 }
 250
 251 static void
 252 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
 253 {
 254         int i;
 255
 256         CP(*from, *to, crk_op);
 257         CP(*from, *to, crk_status);
 258         CP(*from, *to, crk_iparams);
 259         CP(*from, *to, crk_oparams);
 260         CP(*from, *to, crk_crid);
 261         for (i = 0; i < CRK_MAXPARAM; i++)
 262                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
 263 }
 264 #endif
 265
 266 struct csession {
 267         TAILQ_ENTRY(csession) next;
 268         crypto_session_t cses;
 269         u_int32_t       ses;
 270         struct mtx      lock;           /* for op submission */
 271
 272         u_int32_t       cipher;
 273         struct enc_xform *txform;
 274         u_int32_t       mac;
 275         struct auth_hash *thash;
 276
 277         caddr_t         key;
 278         int             keylen;
 279
 280         caddr_t         mackey;
 281         int             mackeylen;
 282 };
 283
 284 struct cryptop_data {
 285         struct csession *cse;
 286
 287         struct iovec    iovec[1];
 288         struct uio      uio;
 289         bool            done;
 290 };
 291
 292 struct fcrypt {
 293         TAILQ_HEAD(csessionlist, csession) csessions;
 294         int             sesn;
 295 };
 296
 297 static  int cryptof_ioctl(struct file *, u_long, void *,
 298                     struct ucred *, struct thread *);
 299 static  int cryptof_stat(struct file *, struct stat *,
 300                     struct ucred *, struct thread *);
 301 static  int cryptof_close(struct file *, struct thread *);
 302 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 303                     struct filedesc *);
 304
 305 static struct fileops cryptofops = {
 306     .fo_read = invfo_rdwr,
 307     .fo_write = invfo_rdwr,
 308     .fo_truncate = invfo_truncate,
 309     .fo_ioctl = cryptof_ioctl,
 310     .fo_poll = invfo_poll,
 311     .fo_kqfilter = invfo_kqfilter,
 312     .fo_stat = cryptof_stat,
 313     .fo_close = cryptof_close,
 314     .fo_chmod = invfo_chmod,
 315     .fo_chown = invfo_chown,
 316     .fo_sendfile = invfo_sendfile,
 317     .fo_fill_kinfo = cryptof_fill_kinfo,
 318 };
 319
 320 static struct csession *csefind(struct fcrypt *, u_int);
 321 static int csedelete(struct fcrypt *, struct csession *);
 322 static struct csession *cseadd(struct fcrypt *, struct csession *);
 323 static struct csession *csecreate(struct fcrypt *, crypto_session_t, caddr_t,
 324     u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
 325     struct auth_hash *);
 326 static void csefree(struct csession *);
 327
 328 static  int cryptodev_op(struct csession *, struct crypt_op *,
 329                         struct ucred *, struct thread *td);
 330 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 331                         struct ucred *, struct thread *);
 332 static  int cryptodev_key(struct crypt_kop *);
 333 static  int cryptodev_find(struct crypt_find_op *);
 334
 335 /*
 336  * Check a crypto identifier to see if it requested
 337  * a software device/driver.  This can be done either
 338  * by device name/class or through search constraints.
 339  */
 340 static int
 341 checkforsoftware(int *cridp)
 342 {
 343         int crid;
 344
 345         crid = *cridp;
 346
 347         if (!crypto_devallowsoft) {
 348                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 349                         if (crid & CRYPTOCAP_F_HARDWARE) {
 350                                 *cridp = CRYPTOCAP_F_HARDWARE;
 351                                 return 0;
 352                         }
 353                         return EINVAL;
 354                 }
 355                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 356                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 357                         return EINVAL;
 358         }
 359         return 0;
 360 }
 361
 362 /* ARGSUSED */
 363 static int
 364 cryptof_ioctl(
 365         struct file *fp,
 366         u_long cmd,
 367         void *data,
 368         struct ucred *active_cred,
 369         struct thread *td)
 370 {
 371 #define SES2(p) ((struct session2_op *)p)
 372         struct cryptoini cria, crie;
 373         struct fcrypt *fcr = fp->f_data;
 374         struct csession *cse;
 375         struct session_op *sop;
 376         struct crypt_op *cop;
 377         struct crypt_aead *caead;
 378         struct enc_xform *txform = NULL;
 379         struct auth_hash *thash = NULL;
 380         struct crypt_kop *kop;
 381         crypto_session_t cses;
 382         u_int32_t ses;
 383         int error = 0, crid;
 384 #ifdef COMPAT_FREEBSD32
 385         struct session2_op sopc;
 386         struct crypt_op copc;
 387         struct crypt_kop kopc;
 388 #endif
 389
 390         switch (cmd) {
 391         case CIOCGSESSION:
 392         case CIOCGSESSION2:
 393 #ifdef COMPAT_FREEBSD32
 394         case CIOCGSESSION32:
 395         case CIOCGSESSION232:
 396                 if (cmd == CIOCGSESSION32) {
 397                         session_op_from_32(data, (struct session_op *)&sopc);
 398                         sop = (struct session_op *)&sopc;
 399                 } else if (cmd == CIOCGSESSION232) {
 400                         session2_op_from_32(data, &sopc);
 401                         sop = (struct session_op *)&sopc;
 402                 } else
 403 #endif
 404                         sop = (struct session_op *)data;
 405                 switch (sop->cipher) {
 406                 case 0:
 407                         break;
 408                 case CRYPTO_DES_CBC:
 409                         txform = &enc_xform_des;
 410                         break;
 411                 case CRYPTO_3DES_CBC:
 412                         txform = &enc_xform_3des;
 413                         break;
 414                 case CRYPTO_BLF_CBC:
 415                         txform = &enc_xform_blf;
 416                         break;
 417                 case CRYPTO_CAST_CBC:
 418                         txform = &enc_xform_cast5;
 419                         break;
 420                 case CRYPTO_SKIPJACK_CBC:
 421                         txform = &enc_xform_skipjack;
 422                         break;
 423                 case CRYPTO_AES_CBC:
 424                         txform = &enc_xform_rijndael128;
 425                         break;
 426                 case CRYPTO_AES_XTS:
 427                         txform = &enc_xform_aes_xts;
 428                         break;
 429                 case CRYPTO_NULL_CBC:
 430                         txform = &enc_xform_null;
 431                         break;
 432                 case CRYPTO_ARC4:
 433                         txform = &enc_xform_arc4;
 434                         break;
 435                 case CRYPTO_CAMELLIA_CBC:
 436                         txform = &enc_xform_camellia;
 437                         break;
 438                 case CRYPTO_AES_ICM:
 439                         txform = &enc_xform_aes_icm;
 440                         break;
 441                 case CRYPTO_AES_NIST_GCM_16:
 442                         txform = &enc_xform_aes_nist_gcm;
 443                         break;
 444                 case CRYPTO_CHACHA20:
 445                         txform = &enc_xform_chacha20;
 446                         break;
 447
 448                 default:
 449                         CRYPTDEB("invalid cipher");
 450                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 451                         return (EINVAL);
 452                 }
 453
 454                 switch (sop->mac) {
 455                 case 0:
 456                         break;
 457                 case CRYPTO_MD5_HMAC:
 458                         thash = &auth_hash_hmac_md5;
 459                         break;
 460                 case CRYPTO_POLY1305:
 461                         thash = &auth_hash_poly1305;
 462                         break;
 463                 case CRYPTO_SHA1_HMAC:
 464                         thash = &auth_hash_hmac_sha1;
 465                         break;
 466                 case CRYPTO_SHA2_224_HMAC:
 467                         thash = &auth_hash_hmac_sha2_224;
 468                         break;
 469                 case CRYPTO_SHA2_256_HMAC:
 470                         thash = &auth_hash_hmac_sha2_256;
 471                         break;
 472                 case CRYPTO_SHA2_384_HMAC:
 473                         thash = &auth_hash_hmac_sha2_384;
 474                         break;
 475                 case CRYPTO_SHA2_512_HMAC:
 476                         thash = &auth_hash_hmac_sha2_512;
 477                         break;
 478                 case CRYPTO_RIPEMD160_HMAC:
 479                         thash = &auth_hash_hmac_ripemd_160;
 480                         break;
 481                 case CRYPTO_AES_128_NIST_GMAC:
 482                         thash = &auth_hash_nist_gmac_aes_128;
 483                         break;
 484                 case CRYPTO_AES_192_NIST_GMAC:
 485                         thash = &auth_hash_nist_gmac_aes_192;
 486                         break;
 487                 case CRYPTO_AES_256_NIST_GMAC:
 488                         thash = &auth_hash_nist_gmac_aes_256;
 489                         break;
 490
 491 #ifdef notdef
 492                 case CRYPTO_MD5:
 493                         thash = &auth_hash_md5;
 494                         break;
 495 #endif
 496                 case CRYPTO_SHA1:
 497                         thash = &auth_hash_sha1;
 498                         break;
 499                 case CRYPTO_SHA2_224:
 500                         thash = &auth_hash_sha2_224;
 501                         break;
 502                 case CRYPTO_SHA2_256:
 503                         thash = &auth_hash_sha2_256;
 504                         break;
 505                 case CRYPTO_SHA2_384:
 506                         thash = &auth_hash_sha2_384;
 507                         break;
 508                 case CRYPTO_SHA2_512:
 509                         thash = &auth_hash_sha2_512;
 510                         break;
 511
 512                 case CRYPTO_NULL_HMAC:
 513                         thash = &auth_hash_null;
 514                         break;
 515
 516                 case CRYPTO_BLAKE2B:
 517                         thash = &auth_hash_blake2b;
 518                         break;
 519                 case CRYPTO_BLAKE2S:
 520                         thash = &auth_hash_blake2s;
 521                         break;
 522
 523                 default:
 524                         CRYPTDEB("invalid mac");
 525                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 526                         return (EINVAL);
 527                 }
 528
 529                 bzero(&crie, sizeof(crie));
 530                 bzero(&cria, sizeof(cria));
 531
 532                 if (txform) {
 533                         crie.cri_alg = txform->type;
 534                         crie.cri_klen = sop->keylen * 8;
 535                         if (sop->keylen > txform->maxkey ||
 536                             sop->keylen < txform->minkey) {
 537                                 CRYPTDEB("invalid cipher parameters");
 538                                 error = EINVAL;
 539                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 540                                     __LINE__);
 541                                 goto bail;
 542                         }
 543
 544                         crie.cri_key = malloc(crie.cri_klen / 8,
 545                             M_XDATA, M_WAITOK);
 546                         if ((error = copyin(sop->key, crie.cri_key,
 547                             crie.cri_klen / 8))) {
 548                                 CRYPTDEB("invalid key");
 549                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 550                                     __LINE__);
 551                                 goto bail;
 552                         }
 553                         if (thash)
 554                                 crie.cri_next = &cria;
 555                 }
 556
 557                 if (thash) {
 558                         cria.cri_alg = thash->type;
 559                         cria.cri_klen = sop->mackeylen * 8;
 560                         if (thash->keysize != 0 &&
 561                             sop->mackeylen > thash->keysize) {
 562                                 CRYPTDEB("invalid mac key length");
 563                                 error = EINVAL;
 564                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 565                                     __LINE__);
 566                                 goto bail;
 567                         }
 568
 569                         if (cria.cri_klen) {
 570                                 cria.cri_key = malloc(cria.cri_klen / 8,
 571                                     M_XDATA, M_WAITOK);
 572                                 if ((error = copyin(sop->mackey, cria.cri_key,
 573                                     cria.cri_klen / 8))) {
 574                                         CRYPTDEB("invalid mac key");
 575                                         SDT_PROBE1(opencrypto, dev, ioctl,
 576                                             error, __LINE__);
 577                                         goto bail;
 578                                 }
 579                         }
 580                 }
 581
 582                 /* NB: CIOCGSESSION2 has the crid */
 583                 if (cmd == CIOCGSESSION2
 584 #ifdef COMPAT_FREEBSD32
 585                     || cmd == CIOCGSESSION232
 586 #endif
 587                         ) {
 588                         crid = SES2(sop)->crid;
 589                         error = checkforsoftware(&crid);
 590                         if (error) {
 591                                 CRYPTDEB("checkforsoftware");
 592                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 593                                     __LINE__);
 594                                 goto bail;
 595                         }
 596                 } else
 597                         crid = CRYPTOCAP_F_HARDWARE;
 598                 error = crypto_newsession(&cses, (txform ? &crie : &cria), crid);
 599                 if (error) {
 600                         CRYPTDEB("crypto_newsession");
 601                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 602                         goto bail;
 603                 }
 604
 605                 cse = csecreate(fcr, cses, crie.cri_key, crie.cri_klen,
 606                     cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
 607                     thash);
 608
 609                 if (cse == NULL) {
 610                         crypto_freesession(cses);
 611                         error = EINVAL;
 612                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 613                         CRYPTDEB("csecreate");
 614                         goto bail;
 615                 }
 616                 sop->ses = cse->ses;
 617                 if (cmd == CIOCGSESSION2
 618 #ifdef COMPAT_FREEBSD32
 619                     || cmd == CIOCGSESSION232
 620 #endif
 621                     ) {
 622                         /* return hardware/driver id */
 623                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 624                 }
 625 bail:
 626                 if (error) {
 627                         if (crie.cri_key)
 628                                 free(crie.cri_key, M_XDATA);
 629                         if (cria.cri_key)
 630                                 free(cria.cri_key, M_XDATA);
 631                 }
 632 #ifdef COMPAT_FREEBSD32
 633                 else {
 634                         if (cmd == CIOCGSESSION32)
 635                                 session_op_to_32(sop, data);
 636                         else if (cmd == CIOCGSESSION232)
 637                                 session2_op_to_32((struct session2_op *)sop,
 638                                     data);
 639                 }
 640 #endif
 641                 break;
 642         case CIOCFSESSION:
 643                 ses = *(u_int32_t *)data;
 644                 cse = csefind(fcr, ses);
 645                 if (cse == NULL) {
 646                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 647                         return (EINVAL);
 648                 }
 649                 csedelete(fcr, cse);
 650                 csefree(cse);
 651                 break;
 652         case CIOCCRYPT:
 653 #ifdef COMPAT_FREEBSD32
 654         case CIOCCRYPT32:
 655                 if (cmd == CIOCCRYPT32) {
 656                         cop = &copc;
 657                         crypt_op_from_32(data, cop);
 658                 } else
 659 #endif
 660                         cop = (struct crypt_op *)data;
 661                 cse = csefind(fcr, cop->ses);
 662                 if (cse == NULL) {
 663                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 664                         return (EINVAL);
 665                 }
 666                 error = cryptodev_op(cse, cop, active_cred, td);
 667 #ifdef COMPAT_FREEBSD32
 668                 if (error == 0 && cmd == CIOCCRYPT32)
 669                         crypt_op_to_32(cop, data);
 670 #endif
 671                 break;
 672         case CIOCKEY:
 673         case CIOCKEY2:
 674 #ifdef COMPAT_FREEBSD32
 675         case CIOCKEY32:
 676         case CIOCKEY232:
 677 #endif
 678                 if (!crypto_userasymcrypto) {
 679                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 680                         return (EPERM);         /* XXX compat? */
 681                 }
 682 #ifdef COMPAT_FREEBSD32
 683                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 684                         kop = &kopc;
 685                         crypt_kop_from_32(data, kop);
 686                 } else
 687 #endif
 688                         kop = (struct crypt_kop *)data;
 689                 if (cmd == CIOCKEY
 690 #ifdef COMPAT_FREEBSD32
 691                     || cmd == CIOCKEY32
 692 #endif
 693                     ) {
 694                         /* NB: crypto core enforces s/w driver use */
 695                         kop->crk_crid =
 696                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 697                 }
 698                 mtx_lock(&Giant);
 699                 error = cryptodev_key(kop);
 700                 mtx_unlock(&Giant);
 701 #ifdef COMPAT_FREEBSD32
 702                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 703                         crypt_kop_to_32(kop, data);
 704 #endif
 705                 break;
 706         case CIOCASYMFEAT:
 707                 if (!crypto_userasymcrypto) {
 708                         /*
 709                          * NB: if user asym crypto operations are
 710                          * not permitted return "no algorithms"
 711                          * so well-behaved applications will just
 712                          * fallback to doing them in software.
 713                          */
 714                         *(int *)data = 0;
 715                 } else {
 716                         error = crypto_getfeat((int *)data);
 717                         if (error)
 718                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 719                                     __LINE__);
 720                 }
 721                 break;
 722         case CIOCFINDDEV:
 723                 error = cryptodev_find((struct crypt_find_op *)data);
 724                 break;
 725         case CIOCCRYPTAEAD:
 726                 caead = (struct crypt_aead *)data;
 727                 cse = csefind(fcr, caead->ses);
 728                 if (cse == NULL) {
 729                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 730                         return (EINVAL);
 731                 }
 732                 error = cryptodev_aead(cse, caead, active_cred, td);
 733                 break;
 734         default:
 735                 error = EINVAL;
 736                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 737                 break;
 738         }
 739         return (error);
 740 #undef SES2
 741 }
 742
 743 static int cryptodev_cb(struct cryptop *);
 744
 745 static struct cryptop_data *
 746 cod_alloc(struct csession *cse, size_t len, struct thread *td)
 747 {
 748         struct cryptop_data *cod;
 749         struct uio *uio;
 750
 751         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 752
 753         cod->cse = cse;
 754         uio = &cod->uio;
 755         uio->uio_iov = cod->iovec;
 756         uio->uio_iovcnt = 1;
 757         uio->uio_resid = len;
 758         uio->uio_segflg = UIO_SYSSPACE;
 759         uio->uio_rw = UIO_WRITE;
 760         uio->uio_td = td;
 761         uio->uio_iov[0].iov_len = len;
 762         uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
 763         return (cod);
 764 }
 765
 766 static void
 767 cod_free(struct cryptop_data *cod)
 768 {
 769
 770         free(cod->uio.uio_iov[0].iov_base, M_XDATA);
 771         free(cod, M_XDATA);
 772 }
 773
 774 static int
 775 cryptodev_op(
 776         struct csession *cse,
 777         struct crypt_op *cop,
 778         struct ucred *active_cred,
 779         struct thread *td)
 780 {
 781         struct cryptop_data *cod = NULL;
 782         struct cryptop *crp = NULL;
 783         struct cryptodesc *crde = NULL, *crda = NULL;
 784         int error;
 785
 786         if (cop->len > 256*1024-4) {
 787                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 788                 return (E2BIG);
 789         }
 790
 791         if (cse->txform) {
 792                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 793                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 794                         return (EINVAL);
 795                 }
 796         }
 797
 798         if (cse->thash)
 799                 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
 800         else
 801                 cod = cod_alloc(cse, cop->len, td);
 802
 803         crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
 804         if (crp == NULL) {
 805                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 806                 error = ENOMEM;
 807                 goto bail;
 808         }
 809
 810         if (cse->thash && cse->txform) {
 811                 if (cop->flags & COP_F_CIPHER_FIRST) {
 812                         crde = crp->crp_desc;
 813                         crda = crde->crd_next;
 814                 } else {
 815                         crda = crp->crp_desc;
 816                         crde = crda->crd_next;
 817                 }
 818         } else if (cse->thash) {
 819                 crda = crp->crp_desc;
 820         } else if (cse->txform) {
 821                 crde = crp->crp_desc;
 822         } else {
 823                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 824                 error = EINVAL;
 825                 goto bail;
 826         }
 827
 828         if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
 829             cop->len))) {
 830                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 831                 goto bail;
 832         }
 833
 834         if (crda) {
 835                 crda->crd_skip = 0;
 836                 crda->crd_len = cop->len;
 837                 crda->crd_inject = cop->len;
 838
 839                 crda->crd_alg = cse->mac;
 840                 crda->crd_key = cse->mackey;
 841                 crda->crd_klen = cse->mackeylen * 8;
 842         }
 843
 844         if (crde) {
 845                 if (cop->op == COP_ENCRYPT)
 846                         crde->crd_flags |= CRD_F_ENCRYPT;
 847                 else
 848                         crde->crd_flags &= ~CRD_F_ENCRYPT;
 849                 crde->crd_len = cop->len;
 850                 crde->crd_inject = 0;
 851
 852                 crde->crd_alg = cse->cipher;
 853                 crde->crd_key = cse->key;
 854                 crde->crd_klen = cse->keylen * 8;
 855         }
 856
 857         crp->crp_ilen = cop->len;
 858         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
 859                        | (cop->flags & COP_F_BATCH);
 860         crp->crp_uio = &cod->uio;
 861         crp->crp_callback = cryptodev_cb;
 862         crp->crp_session = cse->cses;
 863         crp->crp_opaque = cod;
 864
 865         if (cop->iv) {
 866                 if (crde == NULL) {
 867                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 868                         error = EINVAL;
 869                         goto bail;
 870                 }
 871                 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 872                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 873                         error = EINVAL;
 874                         goto bail;
 875                 }
 876                 if ((error = copyin(cop->iv, crde->crd_iv,
 877                     cse->txform->ivsize))) {
 878                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 879                         goto bail;
 880                 }
 881                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
 882                 crde->crd_skip = 0;
 883         } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 884                 crde->crd_skip = 0;
 885         } else if (crde) {
 886                 crde->crd_flags |= CRD_F_IV_PRESENT;
 887                 crde->crd_skip = cse->txform->ivsize;
 888                 crde->crd_len -= cse->txform->ivsize;
 889         }
 890
 891         if (cop->mac && crda == NULL) {
 892                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 893                 error = EINVAL;
 894                 goto bail;
 895         }
 896
 897 again:
 898         /*
 899          * Let the dispatch run unlocked, then, interlock against the
 900          * callback before checking if the operation completed and going
 901          * to sleep.  This insures drivers don't inherit our lock which
 902          * results in a lock order reversal between crypto_dispatch forced
 903          * entry and the crypto_done callback into us.
 904          */
 905         error = crypto_dispatch(crp);
 906         if (error != 0) {
 907                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 908                 goto bail;
 909         }
 910
 911         mtx_lock(&cse->lock);
 912         while (!cod->done)
 913                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
 914         mtx_unlock(&cse->lock);
 915
 916         if (crp->crp_etype == EAGAIN) {
 917                 crp->crp_etype = 0;
 918                 crp->crp_flags &= ~CRYPTO_F_DONE;
 919                 cod->done = false;
 920                 goto again;
 921         }
 922
 923         if (crp->crp_etype != 0) {
 924                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 925                 error = crp->crp_etype;
 926                 goto bail;
 927         }
 928
 929         if (cop->dst &&
 930             (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
 931             cop->len))) {
 932                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 933                 goto bail;
 934         }
 935
 936         if (cop->mac &&
 937             (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
 938             cop->mac, cse->thash->hashsize))) {
 939                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 940                 goto bail;
 941         }
 942
 943 bail:
 944         if (crp)
 945                 crypto_freereq(crp);
 946         if (cod)
 947                 cod_free(cod);
 948
 949         return (error);
 950 }
 951
 952 static int
 953 cryptodev_aead(
 954         struct csession *cse,
 955         struct crypt_aead *caead,
 956         struct ucred *active_cred,
 957         struct thread *td)
 958 {
 959         struct cryptop_data *cod = NULL;
 960         struct cryptop *crp = NULL;
 961         struct cryptodesc *crde = NULL, *crda = NULL;
 962         int error;
 963
 964         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
 965                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 966                 return (E2BIG);
 967         }
 968
 969         if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
 970             (caead->len % cse->txform->blocksize) != 0) {
 971                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 972                 return (EINVAL);
 973         }
 974
 975         cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
 976             td);
 977
 978         crp = crypto_getreq(2);
 979         if (crp == NULL) {
 980                 error = ENOMEM;
 981                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 982                 goto bail;
 983         }
 984
 985         if (caead->flags & COP_F_CIPHER_FIRST) {
 986                 crde = crp->crp_desc;
 987                 crda = crde->crd_next;
 988         } else {
 989                 crda = crp->crp_desc;
 990                 crde = crda->crd_next;
 991         }
 992
 993         if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
 994             caead->aadlen))) {
 995                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 996                 goto bail;
 997         }
 998
 999         if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
1000             caead->aadlen, caead->len))) {
1001                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1002                 goto bail;
1003         }
1004
1005         /*
1006          * For GCM, crd_len covers only the AAD.  For other ciphers
1007          * chained with an HMAC, crd_len covers both the AAD and the
1008          * cipher text.
1009          */
1010         crda->crd_skip = 0;
1011         if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
1012                 crda->crd_len = caead->aadlen;
1013         else
1014                 crda->crd_len = caead->aadlen + caead->len;
1015         crda->crd_inject = caead->aadlen + caead->len;
1016
1017         crda->crd_alg = cse->mac;
1018         crda->crd_key = cse->mackey;
1019         crda->crd_klen = cse->mackeylen * 8;
1020
1021         if (caead->op == COP_ENCRYPT)
1022                 crde->crd_flags |= CRD_F_ENCRYPT;
1023         else
1024                 crde->crd_flags &= ~CRD_F_ENCRYPT;
1025         crde->crd_skip = caead->aadlen;
1026         crde->crd_len = caead->len;
1027         crde->crd_inject = caead->aadlen;
1028
1029         crde->crd_alg = cse->cipher;
1030         crde->crd_key = cse->key;
1031         crde->crd_klen = cse->keylen * 8;
1032
1033         crp->crp_ilen = caead->aadlen + caead->len;
1034         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1035                        | (caead->flags & COP_F_BATCH);
1036         crp->crp_uio = &cod->uio;
1037         crp->crp_callback = cryptodev_cb;
1038         crp->crp_session = cse->cses;
1039         crp->crp_opaque = cod;
1040
1041         if (caead->iv) {
1042                 if (caead->ivlen > sizeof(crde->crd_iv)) {
1043                         error = EINVAL;
1044                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1045                         goto bail;
1046                 }
1047
1048                 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1049                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1050                         goto bail;
1051                 }
1052                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1053         } else {
1054                 crde->crd_flags |= CRD_F_IV_PRESENT;
1055                 crde->crd_skip += cse->txform->ivsize;
1056                 crde->crd_len -= cse->txform->ivsize;
1057         }
1058
1059         if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1060             caead->len + caead->aadlen, cse->thash->hashsize))) {
1061                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1062                 goto bail;
1063         }
1064 again:
1065         /*
1066          * Let the dispatch run unlocked, then, interlock against the
1067          * callback before checking if the operation completed and going
1068          * to sleep.  This insures drivers don't inherit our lock which
1069          * results in a lock order reversal between crypto_dispatch forced
1070          * entry and the crypto_done callback into us.
1071          */
1072         error = crypto_dispatch(crp);
1073         if (error != 0) {
1074                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1075                 goto bail;
1076         }
1077
1078         mtx_lock(&cse->lock);
1079         while (!cod->done)
1080                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1081         mtx_unlock(&cse->lock);
1082
1083         if (crp->crp_etype == EAGAIN) {
1084                 crp->crp_etype = 0;
1085                 crp->crp_flags &= ~CRYPTO_F_DONE;
1086                 cod->done = false;
1087                 goto again;
1088         }
1089
1090         if (crp->crp_etype != 0) {
1091                 error = crp->crp_etype;
1092                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1093                 goto bail;
1094         }
1095
1096         if (caead->dst && (error = copyout(
1097             (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1098             caead->len))) {
1099                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1100                 goto bail;
1101         }
1102
1103         if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1104             caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1105                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1106                 goto bail;
1107         }
1108
1109 bail:
1110         crypto_freereq(crp);
1111         if (cod)
1112                 cod_free(cod);
1113
1114         return (error);
1115 }
1116
1117 static int
1118 cryptodev_cb(struct cryptop *crp)
1119 {
1120         struct cryptop_data *cod = crp->crp_opaque;
1121
1122         /*
1123          * Lock to ensure the wakeup() is not missed by the loops
1124          * waiting on cod->done in cryptodev_op() and
1125          * cryptodev_aead().
1126          */
1127         mtx_lock(&cod->cse->lock);
1128         cod->done = true;
1129         mtx_unlock(&cod->cse->lock);
1130         wakeup(cod);
1131         return (0);
1132 }
1133
1134 static int
1135 cryptodevkey_cb(void *op)
1136 {
1137         struct cryptkop *krp = (struct cryptkop *) op;
1138
1139         wakeup_one(krp);
1140         return (0);
1141 }
1142
1143 static int
1144 cryptodev_key(struct crypt_kop *kop)
1145 {
1146         struct cryptkop *krp = NULL;
1147         int error = EINVAL;
1148         int in, out, size, i;
1149
1150         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1151                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1152                 return (EFBIG);
1153         }
1154
1155         in = kop->crk_iparams;
1156         out = kop->crk_oparams;
1157         switch (kop->crk_op) {
1158         case CRK_MOD_EXP:
1159                 if (in == 3 && out == 1)
1160                         break;
1161                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1162                 return (EINVAL);
1163         case CRK_MOD_EXP_CRT:
1164                 if (in == 6 && out == 1)
1165                         break;
1166                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1167                 return (EINVAL);
1168         case CRK_DSA_SIGN:
1169                 if (in == 5 && out == 2)
1170                         break;
1171                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1172                 return (EINVAL);
1173         case CRK_DSA_VERIFY:
1174                 if (in == 7 && out == 0)
1175                         break;
1176                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1177                 return (EINVAL);
1178         case CRK_DH_COMPUTE_KEY:
1179                 if (in == 3 && out == 1)
1180                         break;
1181                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1182                 return (EINVAL);
1183         default:
1184                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1185                 return (EINVAL);
1186         }
1187
1188         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1189         if (!krp) {
1190                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1191                 return (ENOMEM);
1192         }
1193         krp->krp_op = kop->crk_op;
1194         krp->krp_status = kop->crk_status;
1195         krp->krp_iparams = kop->crk_iparams;
1196         krp->krp_oparams = kop->crk_oparams;
1197         krp->krp_crid = kop->crk_crid;
1198         krp->krp_status = 0;
1199         krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1200
1201         for (i = 0; i < CRK_MAXPARAM; i++) {
1202                 if (kop->crk_param[i].crp_nbits > 65536) {
1203                         /* Limit is the same as in OpenBSD */
1204                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1205                         goto fail;
1206                 }
1207                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1208         }
1209         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1210                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1211                 if (size == 0)
1212                         continue;
1213                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1214                 if (i >= krp->krp_iparams)
1215                         continue;
1216                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1217                 if (error) {
1218                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1219                         goto fail;
1220                 }
1221         }
1222
1223         error = crypto_kdispatch(krp);
1224         if (error) {
1225                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1226                 goto fail;
1227         }
1228         error = tsleep(krp, PSOCK, "crydev", 0);
1229         if (error) {
1230                 /* XXX can this happen?  if so, how do we recover? */
1231                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1232                 goto fail;
1233         }
1234
1235         kop->crk_crid = krp->krp_crid;          /* device that did the work */
1236         if (krp->krp_status != 0) {
1237                 error = krp->krp_status;
1238                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1239                 goto fail;
1240         }
1241
1242         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1243                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1244                 if (size == 0)
1245                         continue;
1246                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1247                 if (error) {
1248                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1249                         goto fail;
1250                 }
1251         }
1252
1253 fail:
1254         if (krp) {
1255                 kop->crk_status = krp->krp_status;
1256                 for (i = 0; i < CRK_MAXPARAM; i++) {
1257                         if (krp->krp_param[i].crp_p)
1258                                 free(krp->krp_param[i].crp_p, M_XDATA);
1259                 }
1260                 free(krp, M_XDATA);
1261         }
1262         return (error);
1263 }
1264
1265 static int
1266 cryptodev_find(struct crypt_find_op *find)
1267 {
1268         device_t dev;
1269         size_t fnlen = sizeof find->name;
1270
1271         if (find->crid != -1) {
1272                 dev = crypto_find_device_byhid(find->crid);
1273                 if (dev == NULL)
1274                         return (ENOENT);
1275                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1276                 find->name[fnlen - 1] = '\x0';
1277         } else {
1278                 find->name[fnlen - 1] = '\x0';
1279                 find->crid = crypto_find_driver(find->name);
1280                 if (find->crid == -1)
1281                         return (ENOENT);
1282         }
1283         return (0);
1284 }
1285
1286 /* ARGSUSED */
1287 static int
1288 cryptof_stat(
1289         struct file *fp,
1290         struct stat *sb,
1291         struct ucred *active_cred,
1292         struct thread *td)
1293 {
1294
1295         return (EOPNOTSUPP);
1296 }
1297
1298 /* ARGSUSED */
1299 static int
1300 cryptof_close(struct file *fp, struct thread *td)
1301 {
1302         struct fcrypt *fcr = fp->f_data;
1303         struct csession *cse;
1304
1305         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1306                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1307                 csefree(cse);
1308         }
1309         free(fcr, M_XDATA);
1310         fp->f_data = NULL;
1311         return 0;
1312 }
1313
1314 static int
1315 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1316 {
1317
1318         kif->kf_type = KF_TYPE_CRYPTO;
1319         return (0);
1320 }
1321
1322 static struct csession *
1323 csefind(struct fcrypt *fcr, u_int ses)
1324 {
1325         struct csession *cse;
1326
1327         TAILQ_FOREACH(cse, &fcr->csessions, next)
1328                 if (cse->ses == ses)
1329                         return (cse);
1330         return (NULL);
1331 }
1332
1333 static int
1334 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1335 {
1336         struct csession *cse;
1337
1338         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1339                 if (cse == cse_del) {
1340                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1341                         return (1);
1342                 }
1343         }
1344         return (0);
1345 }
1346
1347 static struct csession *
1348 cseadd(struct fcrypt *fcr, struct csession *cse)
1349 {
1350         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1351         cse->ses = fcr->sesn++;
1352         return (cse);
1353 }
1354
1355 struct csession *
1356 csecreate(struct fcrypt *fcr, crypto_session_t cses, caddr_t key, u_int64_t keylen,
1357     caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1358     struct enc_xform *txform, struct auth_hash *thash)
1359 {
1360         struct csession *cse;
1361
1362         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1363         if (cse == NULL)
1364                 return NULL;
1365         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1366         cse->key = key;
1367         cse->keylen = keylen/8;
1368         cse->mackey = mackey;
1369         cse->mackeylen = mackeylen/8;
1370         cse->cses = cses;
1371         cse->cipher = cipher;
1372         cse->mac = mac;
1373         cse->txform = txform;
1374         cse->thash = thash;
1375         cseadd(fcr, cse);
1376         return (cse);
1377 }
1378
1379 static void
1380 csefree(struct csession *cse)
1381 {
1382
1383         crypto_freesession(cse->cses);
1384         mtx_destroy(&cse->lock);
1385         if (cse->key)
1386                 free(cse->key, M_XDATA);
1387         if (cse->mackey)
1388                 free(cse->mackey, M_XDATA);
1389         free(cse, M_XDATA);
1390 }
1391
1392 static int
1393 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1394 {
1395         return (0);
1396 }
1397
1398 static int
1399 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1400 {
1401         return (EIO);
1402 }
1403
1404 static int
1405 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1406 {
1407         return (EIO);
1408 }
1409
1410 static int
1411 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1412 {
1413         struct file *f;
1414         struct fcrypt *fcr;
1415         int fd, error;
1416
1417         switch (cmd) {
1418         case CRIOGET:
1419                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1420                 TAILQ_INIT(&fcr->csessions);
1421                 fcr->sesn = 0;
1422
1423                 error = falloc(td, &f, &fd, 0);
1424
1425                 if (error) {
1426                         free(fcr, M_XDATA);
1427                         return (error);
1428                 }
1429                 /* falloc automatically provides an extra reference to 'f'. */
1430                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1431                 *(u_int32_t *)data = fd;
1432                 fdrop(f, td);
1433                 break;
1434         case CRIOFINDDEV:
1435                 error = cryptodev_find((struct crypt_find_op *)data);
1436                 break;
1437         case CRIOASYMFEAT:
1438                 error = crypto_getfeat((int *)data);
1439                 break;
1440         default:
1441                 error = EINVAL;
1442                 break;
1443         }
1444         return (error);
1445 }
1446
1447 static struct cdevsw crypto_cdevsw = {
1448         .d_version =    D_VERSION,
1449         .d_flags =      D_NEEDGIANT,
1450         .d_open =       cryptoopen,
1451         .d_read =       cryptoread,
1452         .d_write =      cryptowrite,
1453         .d_ioctl =      cryptoioctl,
1454         .d_name =       "crypto",
1455 };
1456 static struct cdev *crypto_dev;
1457
1458 /*
1459  * Initialization code, both for static and dynamic loading.
1460  */
1461 static int
1462 cryptodev_modevent(module_t mod, int type, void *unused)
1463 {
1464         switch (type) {
1465         case MOD_LOAD:
1466                 if (bootverbose)
1467                         printf("crypto: <crypto device>\n");
1468                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1469                                       UID_ROOT, GID_WHEEL, 0666,
1470                                       "crypto");
1471                 return 0;
1472         case MOD_UNLOAD:
1473                 /*XXX disallow if active sessions */
1474                 destroy_dev(crypto_dev);
1475                 return 0;
1476         }
1477         return EINVAL;
1478 }
1479
1480 static moduledata_t cryptodev_mod = {
1481         "cryptodev",
1482         cryptodev_modevent,
1483         0
1484 };
1485 MODULE_VERSION(cryptodev, 1);
1486 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1487 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1488 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);