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         volatile u_int  refs;
 270         u_int32_t       ses;
 271         struct mtx      lock;           /* for op submission */
 272
 273         u_int32_t       cipher;
 274         struct enc_xform *txform;
 275         u_int32_t       mac;
 276         struct auth_hash *thash;
 277
 278         caddr_t         key;
 279         int             keylen;
 280
 281         caddr_t         mackey;
 282         int             mackeylen;
 283 };
 284
 285 struct cryptop_data {
 286         struct csession *cse;
 287
 288         struct iovec    iovec[1];
 289         struct uio      uio;
 290         bool            done;
 291 };
 292
 293 struct fcrypt {
 294         TAILQ_HEAD(csessionlist, csession) csessions;
 295         int             sesn;
 296         struct mtx      lock;
 297 };
 298
 299 static struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
 300 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
 301     &warninterval,
 302     "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
 303
 304 static  int cryptof_ioctl(struct file *, u_long, void *,
 305                     struct ucred *, struct thread *);
 306 static  int cryptof_stat(struct file *, struct stat *,
 307                     struct ucred *, struct thread *);
 308 static  int cryptof_close(struct file *, struct thread *);
 309 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 310                     struct filedesc *);
 311
 312 static struct fileops cryptofops = {
 313     .fo_read = invfo_rdwr,
 314     .fo_write = invfo_rdwr,
 315     .fo_truncate = invfo_truncate,
 316     .fo_ioctl = cryptof_ioctl,
 317     .fo_poll = invfo_poll,
 318     .fo_kqfilter = invfo_kqfilter,
 319     .fo_stat = cryptof_stat,
 320     .fo_close = cryptof_close,
 321     .fo_chmod = invfo_chmod,
 322     .fo_chown = invfo_chown,
 323     .fo_sendfile = invfo_sendfile,
 324     .fo_fill_kinfo = cryptof_fill_kinfo,
 325 };
 326
 327 static struct csession *csefind(struct fcrypt *, u_int);
 328 static bool csedelete(struct fcrypt *, u_int);
 329 static struct csession *csecreate(struct fcrypt *, crypto_session_t, caddr_t,
 330     u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
 331     struct auth_hash *);
 332 static void csefree(struct csession *);
 333
 334 static  int cryptodev_op(struct csession *, struct crypt_op *,
 335                         struct ucred *, struct thread *td);
 336 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 337                         struct ucred *, struct thread *);
 338 static  int cryptodev_key(struct crypt_kop *);
 339 static  int cryptodev_find(struct crypt_find_op *);
 340
 341 /*
 342  * Check a crypto identifier to see if it requested
 343  * a software device/driver.  This can be done either
 344  * by device name/class or through search constraints.
 345  */
 346 static int
 347 checkforsoftware(int *cridp)
 348 {
 349         int crid;
 350
 351         crid = *cridp;
 352
 353         if (!crypto_devallowsoft) {
 354                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 355                         if (crid & CRYPTOCAP_F_HARDWARE) {
 356                                 *cridp = CRYPTOCAP_F_HARDWARE;
 357                                 return 0;
 358                         }
 359                         return EINVAL;
 360                 }
 361                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 362                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 363                         return EINVAL;
 364         }
 365         return 0;
 366 }
 367
 368 /* ARGSUSED */
 369 static int
 370 cryptof_ioctl(
 371         struct file *fp,
 372         u_long cmd,
 373         void *data,
 374         struct ucred *active_cred,
 375         struct thread *td)
 376 {
 377 #define SES2(p) ((struct session2_op *)p)
 378         struct cryptoini cria, crie;
 379         struct fcrypt *fcr = fp->f_data;
 380         struct csession *cse;
 381         struct session_op *sop;
 382         struct crypt_op *cop;
 383         struct crypt_aead *caead;
 384         struct enc_xform *txform = NULL;
 385         struct auth_hash *thash = NULL;
 386         struct crypt_kop *kop;
 387         crypto_session_t cses;
 388         u_int32_t ses;
 389         int error = 0, crid;
 390 #ifdef COMPAT_FREEBSD32
 391         struct session2_op sopc;
 392         struct crypt_op copc;
 393         struct crypt_kop kopc;
 394 #endif
 395
 396         switch (cmd) {
 397         case CIOCGSESSION:
 398         case CIOCGSESSION2:
 399 #ifdef COMPAT_FREEBSD32
 400         case CIOCGSESSION32:
 401         case CIOCGSESSION232:
 402                 if (cmd == CIOCGSESSION32) {
 403                         session_op_from_32(data, (struct session_op *)&sopc);
 404                         sop = (struct session_op *)&sopc;
 405                 } else if (cmd == CIOCGSESSION232) {
 406                         session2_op_from_32(data, &sopc);
 407                         sop = (struct session_op *)&sopc;
 408                 } else
 409 #endif
 410                         sop = (struct session_op *)data;
 411                 switch (sop->cipher) {
 412                 case 0:
 413                         break;
 414                 case CRYPTO_DES_CBC:
 415                         txform = &enc_xform_des;
 416                         break;
 417                 case CRYPTO_3DES_CBC:
 418                         txform = &enc_xform_3des;
 419                         break;
 420                 case CRYPTO_BLF_CBC:
 421                         txform = &enc_xform_blf;
 422                         break;
 423                 case CRYPTO_CAST_CBC:
 424                         txform = &enc_xform_cast5;
 425                         break;
 426                 case CRYPTO_SKIPJACK_CBC:
 427                         txform = &enc_xform_skipjack;
 428                         break;
 429                 case CRYPTO_AES_CBC:
 430                         txform = &enc_xform_rijndael128;
 431                         break;
 432                 case CRYPTO_AES_XTS:
 433                         txform = &enc_xform_aes_xts;
 434                         break;
 435                 case CRYPTO_NULL_CBC:
 436                         txform = &enc_xform_null;
 437                         break;
 438                 case CRYPTO_ARC4:
 439                         txform = &enc_xform_arc4;
 440                         break;
 441                 case CRYPTO_CAMELLIA_CBC:
 442                         txform = &enc_xform_camellia;
 443                         break;
 444                 case CRYPTO_AES_ICM:
 445                         txform = &enc_xform_aes_icm;
 446                         break;
 447                 case CRYPTO_AES_NIST_GCM_16:
 448                         txform = &enc_xform_aes_nist_gcm;
 449                         break;
 450                 case CRYPTO_CHACHA20:
 451                         txform = &enc_xform_chacha20;
 452                         break;
 453                 case CRYPTO_AES_CCM_16:
 454                         txform = &enc_xform_ccm;
 455                         break;
 456
 457                 default:
 458                         CRYPTDEB("invalid cipher");
 459                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 460                         return (EINVAL);
 461                 }
 462
 463                 switch (sop->mac) {
 464                 case 0:
 465                         break;
 466                 case CRYPTO_MD5_HMAC:
 467                         thash = &auth_hash_hmac_md5;
 468                         break;
 469                 case CRYPTO_POLY1305:
 470                         thash = &auth_hash_poly1305;
 471                         break;
 472                 case CRYPTO_SHA1_HMAC:
 473                         thash = &auth_hash_hmac_sha1;
 474                         break;
 475                 case CRYPTO_SHA2_224_HMAC:
 476                         thash = &auth_hash_hmac_sha2_224;
 477                         break;
 478                 case CRYPTO_SHA2_256_HMAC:
 479                         thash = &auth_hash_hmac_sha2_256;
 480                         break;
 481                 case CRYPTO_SHA2_384_HMAC:
 482                         thash = &auth_hash_hmac_sha2_384;
 483                         break;
 484                 case CRYPTO_SHA2_512_HMAC:
 485                         thash = &auth_hash_hmac_sha2_512;
 486                         break;
 487                 case CRYPTO_RIPEMD160_HMAC:
 488                         thash = &auth_hash_hmac_ripemd_160;
 489                         break;
 490                 case CRYPTO_AES_128_NIST_GMAC:
 491                         thash = &auth_hash_nist_gmac_aes_128;
 492                         break;
 493                 case CRYPTO_AES_192_NIST_GMAC:
 494                         thash = &auth_hash_nist_gmac_aes_192;
 495                         break;
 496                 case CRYPTO_AES_256_NIST_GMAC:
 497                         thash = &auth_hash_nist_gmac_aes_256;
 498                         break;
 499
 500                 case CRYPTO_AES_CCM_CBC_MAC:
 501                         switch (sop->keylen) {
 502                         case 16:
 503                                 thash = &auth_hash_ccm_cbc_mac_128;
 504                                 break;
 505                         case 24:
 506                                 thash = &auth_hash_ccm_cbc_mac_192;
 507                                 break;
 508                         case 32:
 509                                 thash = &auth_hash_ccm_cbc_mac_256;
 510                                 break;
 511                         default:
 512                                 CRYPTDEB("Invalid CBC MAC key size %d",
 513                                     sop->keylen);
 514                                 SDT_PROBE1(opencrypto, dev, ioctl,
 515                                     error, __LINE__);
 516                                 return (EINVAL);
 517                         }
 518                         break;
 519 #ifdef notdef
 520                 case CRYPTO_MD5:
 521                         thash = &auth_hash_md5;
 522                         break;
 523 #endif
 524                 case CRYPTO_SHA1:
 525                         thash = &auth_hash_sha1;
 526                         break;
 527                 case CRYPTO_SHA2_224:
 528                         thash = &auth_hash_sha2_224;
 529                         break;
 530                 case CRYPTO_SHA2_256:
 531                         thash = &auth_hash_sha2_256;
 532                         break;
 533                 case CRYPTO_SHA2_384:
 534                         thash = &auth_hash_sha2_384;
 535                         break;
 536                 case CRYPTO_SHA2_512:
 537                         thash = &auth_hash_sha2_512;
 538                         break;
 539
 540                 case CRYPTO_NULL_HMAC:
 541                         thash = &auth_hash_null;
 542                         break;
 543
 544                 case CRYPTO_BLAKE2B:
 545                         thash = &auth_hash_blake2b;
 546                         break;
 547                 case CRYPTO_BLAKE2S:
 548                         thash = &auth_hash_blake2s;
 549                         break;
 550
 551                 default:
 552                         CRYPTDEB("invalid mac");
 553                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 554                         return (EINVAL);
 555                 }
 556
 557                 bzero(&crie, sizeof(crie));
 558                 bzero(&cria, sizeof(cria));
 559
 560                 if (txform) {
 561                         crie.cri_alg = txform->type;
 562                         crie.cri_klen = sop->keylen * 8;
 563                         if (sop->keylen > txform->maxkey ||
 564                             sop->keylen < txform->minkey) {
 565                                 CRYPTDEB("invalid cipher parameters");
 566                                 error = EINVAL;
 567                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 568                                     __LINE__);
 569                                 goto bail;
 570                         }
 571
 572                         crie.cri_key = malloc(crie.cri_klen / 8,
 573                             M_XDATA, M_WAITOK);
 574                         if ((error = copyin(sop->key, crie.cri_key,
 575                             crie.cri_klen / 8))) {
 576                                 CRYPTDEB("invalid key");
 577                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 578                                     __LINE__);
 579                                 goto bail;
 580                         }
 581                         if (thash)
 582                                 crie.cri_next = &cria;
 583                 }
 584
 585                 if (thash) {
 586                         cria.cri_alg = thash->type;
 587                         cria.cri_klen = sop->mackeylen * 8;
 588                         if (sop->mackeylen > thash->keysize ||
 589                             sop->mackeylen < 0) {
 590                                 CRYPTDEB("invalid mac key length");
 591                                 error = EINVAL;
 592                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 593                                     __LINE__);
 594                                 goto bail;
 595                         }
 596
 597                         if (cria.cri_klen) {
 598                                 cria.cri_key = malloc(cria.cri_klen / 8,
 599                                     M_XDATA, M_WAITOK);
 600                                 if ((error = copyin(sop->mackey, cria.cri_key,
 601                                     cria.cri_klen / 8))) {
 602                                         CRYPTDEB("invalid mac key");
 603                                         SDT_PROBE1(opencrypto, dev, ioctl,
 604                                             error, __LINE__);
 605                                         goto bail;
 606                                 }
 607                         }
 608                 }
 609
 610                 /* NB: CIOCGSESSION2 has the crid */
 611                 if (cmd == CIOCGSESSION2
 612 #ifdef COMPAT_FREEBSD32
 613                     || cmd == CIOCGSESSION232
 614 #endif
 615                         ) {
 616                         crid = SES2(sop)->crid;
 617                         error = checkforsoftware(&crid);
 618                         if (error) {
 619                                 CRYPTDEB("checkforsoftware");
 620                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 621                                     __LINE__);
 622                                 goto bail;
 623                         }
 624                 } else
 625                         crid = CRYPTOCAP_F_HARDWARE;
 626                 error = crypto_newsession(&cses, (txform ? &crie : &cria), crid);
 627                 if (error) {
 628                         CRYPTDEB("crypto_newsession");
 629                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 630                         goto bail;
 631                 }
 632
 633                 cse = csecreate(fcr, cses, crie.cri_key, crie.cri_klen,
 634                     cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
 635                     thash);
 636
 637                 if (cse == NULL) {
 638                         crypto_freesession(cses);
 639                         error = EINVAL;
 640                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 641                         CRYPTDEB("csecreate");
 642                         goto bail;
 643                 }
 644                 sop->ses = cse->ses;
 645                 if (cmd == CIOCGSESSION2
 646 #ifdef COMPAT_FREEBSD32
 647                     || cmd == CIOCGSESSION232
 648 #endif
 649                     ) {
 650                         /* return hardware/driver id */
 651                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 652                 }
 653 bail:
 654                 if (error) {
 655                         if (crie.cri_key)
 656                                 free(crie.cri_key, M_XDATA);
 657                         if (cria.cri_key)
 658                                 free(cria.cri_key, M_XDATA);
 659                 }
 660 #ifdef COMPAT_FREEBSD32
 661                 else {
 662                         if (cmd == CIOCGSESSION32)
 663                                 session_op_to_32(sop, data);
 664                         else if (cmd == CIOCGSESSION232)
 665                                 session2_op_to_32((struct session2_op *)sop,
 666                                     data);
 667                 }
 668 #endif
 669                 break;
 670         case CIOCFSESSION:
 671                 ses = *(u_int32_t *)data;
 672                 if (!csedelete(fcr, ses)) {
 673                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 674                         return (EINVAL);
 675                 }
 676                 break;
 677         case CIOCCRYPT:
 678 #ifdef COMPAT_FREEBSD32
 679         case CIOCCRYPT32:
 680                 if (cmd == CIOCCRYPT32) {
 681                         cop = &copc;
 682                         crypt_op_from_32(data, cop);
 683                 } else
 684 #endif
 685                         cop = (struct crypt_op *)data;
 686                 cse = csefind(fcr, cop->ses);
 687                 if (cse == NULL) {
 688                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 689                         return (EINVAL);
 690                 }
 691                 error = cryptodev_op(cse, cop, active_cred, td);
 692                 csefree(cse);
 693 #ifdef COMPAT_FREEBSD32
 694                 if (error == 0 && cmd == CIOCCRYPT32)
 695                         crypt_op_to_32(cop, data);
 696 #endif
 697                 break;
 698         case CIOCKEY:
 699         case CIOCKEY2:
 700 #ifdef COMPAT_FREEBSD32
 701         case CIOCKEY32:
 702         case CIOCKEY232:
 703 #endif
 704                 if (!crypto_userasymcrypto) {
 705                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 706                         return (EPERM);         /* XXX compat? */
 707                 }
 708 #ifdef COMPAT_FREEBSD32
 709                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 710                         kop = &kopc;
 711                         crypt_kop_from_32(data, kop);
 712                 } else
 713 #endif
 714                         kop = (struct crypt_kop *)data;
 715                 if (cmd == CIOCKEY
 716 #ifdef COMPAT_FREEBSD32
 717                     || cmd == CIOCKEY32
 718 #endif
 719                     ) {
 720                         /* NB: crypto core enforces s/w driver use */
 721                         kop->crk_crid =
 722                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 723                 }
 724                 mtx_lock(&Giant);
 725                 error = cryptodev_key(kop);
 726                 mtx_unlock(&Giant);
 727 #ifdef COMPAT_FREEBSD32
 728                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 729                         crypt_kop_to_32(kop, data);
 730 #endif
 731                 break;
 732         case CIOCASYMFEAT:
 733                 if (!crypto_userasymcrypto) {
 734                         /*
 735                          * NB: if user asym crypto operations are
 736                          * not permitted return "no algorithms"
 737                          * so well-behaved applications will just
 738                          * fallback to doing them in software.
 739                          */
 740                         *(int *)data = 0;
 741                 } else {
 742                         error = crypto_getfeat((int *)data);
 743                         if (error)
 744                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 745                                     __LINE__);
 746                 }
 747                 break;
 748         case CIOCFINDDEV:
 749                 error = cryptodev_find((struct crypt_find_op *)data);
 750                 break;
 751         case CIOCCRYPTAEAD:
 752                 caead = (struct crypt_aead *)data;
 753                 cse = csefind(fcr, caead->ses);
 754                 if (cse == NULL) {
 755                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 756                         return (EINVAL);
 757                 }
 758                 error = cryptodev_aead(cse, caead, active_cred, td);
 759                 csefree(cse);
 760                 break;
 761         default:
 762                 error = EINVAL;
 763                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 764                 break;
 765         }
 766         return (error);
 767 #undef SES2
 768 }
 769
 770 static int cryptodev_cb(struct cryptop *);
 771
 772 static struct cryptop_data *
 773 cod_alloc(struct csession *cse, size_t len, struct thread *td)
 774 {
 775         struct cryptop_data *cod;
 776         struct uio *uio;
 777
 778         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 779
 780         cod->cse = cse;
 781         uio = &cod->uio;
 782         uio->uio_iov = cod->iovec;
 783         uio->uio_iovcnt = 1;
 784         uio->uio_resid = len;
 785         uio->uio_segflg = UIO_SYSSPACE;
 786         uio->uio_rw = UIO_WRITE;
 787         uio->uio_td = td;
 788         uio->uio_iov[0].iov_len = len;
 789         uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
 790         return (cod);
 791 }
 792
 793 static void
 794 cod_free(struct cryptop_data *cod)
 795 {
 796
 797         free(cod->uio.uio_iov[0].iov_base, M_XDATA);
 798         free(cod, M_XDATA);
 799 }
 800
 801 static void
 802 cryptodev_warn(struct csession *cse)
 803 {
 804         static struct timeval arc4warn, blfwarn, castwarn, deswarn, md5warn;
 805         static struct timeval skipwarn, tdeswarn;
 806
 807         switch (cse->cipher) {
 808         case CRYPTO_DES_CBC:
 809                 if (ratecheck(&deswarn, &warninterval))
 810                         gone_in(13, "DES cipher via /dev/crypto");
 811                 break;
 812         case CRYPTO_3DES_CBC:
 813                 if (ratecheck(&tdeswarn, &warninterval))
 814                         gone_in(13, "3DES cipher via /dev/crypto");
 815                 break;
 816         case CRYPTO_BLF_CBC:
 817                 if (ratecheck(&blfwarn, &warninterval))
 818                         gone_in(13, "Blowfish cipher via /dev/crypto");
 819                 break;
 820         case CRYPTO_CAST_CBC:
 821                 if (ratecheck(&castwarn, &warninterval))
 822                         gone_in(13, "CAST128 cipher via /dev/crypto");
 823                 break;
 824         case CRYPTO_SKIPJACK_CBC:
 825                 if (ratecheck(&skipwarn, &warninterval))
 826                         gone_in(13, "Skipjack cipher via /dev/crypto");
 827                 break;
 828         case CRYPTO_ARC4:
 829                 if (ratecheck(&arc4warn, &warninterval))
 830                         gone_in(13, "ARC4 cipher via /dev/crypto");
 831                 break;
 832         }
 833
 834         switch (cse->mac) {
 835         case CRYPTO_MD5_HMAC:
 836                 if (ratecheck(&md5warn, &warninterval))
 837                         gone_in(13, "MD5-HMAC authenticator via /dev/crypto");
 838                 break;
 839         }
 840 }
 841
 842 static int
 843 cryptodev_op(
 844         struct csession *cse,
 845         struct crypt_op *cop,
 846         struct ucred *active_cred,
 847         struct thread *td)
 848 {
 849         struct cryptop_data *cod = NULL;
 850         struct cryptop *crp = NULL;
 851         struct cryptodesc *crde = NULL, *crda = NULL;
 852         int error;
 853
 854         if (cop->len > 256*1024-4) {
 855                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 856                 return (E2BIG);
 857         }
 858
 859         if (cse->txform) {
 860                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 861                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 862                         return (EINVAL);
 863                 }
 864         }
 865
 866         if (cse->thash)
 867                 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
 868         else
 869                 cod = cod_alloc(cse, cop->len, td);
 870
 871         crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
 872         if (crp == NULL) {
 873                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 874                 error = ENOMEM;
 875                 goto bail;
 876         }
 877
 878         if (cse->thash && cse->txform) {
 879                 if (cop->flags & COP_F_CIPHER_FIRST) {
 880                         crde = crp->crp_desc;
 881                         crda = crde->crd_next;
 882                 } else {
 883                         crda = crp->crp_desc;
 884                         crde = crda->crd_next;
 885                 }
 886         } else if (cse->thash) {
 887                 crda = crp->crp_desc;
 888         } else if (cse->txform) {
 889                 crde = crp->crp_desc;
 890         } else {
 891                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 892                 error = EINVAL;
 893                 goto bail;
 894         }
 895
 896         if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
 897             cop->len))) {
 898                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 899                 goto bail;
 900         }
 901
 902         if (crda) {
 903                 crda->crd_skip = 0;
 904                 crda->crd_len = cop->len;
 905                 crda->crd_inject = cop->len;
 906
 907                 crda->crd_alg = cse->mac;
 908                 crda->crd_key = cse->mackey;
 909                 crda->crd_klen = cse->mackeylen * 8;
 910         }
 911
 912         if (crde) {
 913                 if (cop->op == COP_ENCRYPT)
 914                         crde->crd_flags |= CRD_F_ENCRYPT;
 915                 else
 916                         crde->crd_flags &= ~CRD_F_ENCRYPT;
 917                 crde->crd_len = cop->len;
 918                 crde->crd_inject = 0;
 919
 920                 crde->crd_alg = cse->cipher;
 921                 crde->crd_key = cse->key;
 922                 crde->crd_klen = cse->keylen * 8;
 923         }
 924
 925         crp->crp_ilen = cop->len;
 926         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
 927                        | (cop->flags & COP_F_BATCH);
 928         crp->crp_uio = &cod->uio;
 929         crp->crp_callback = cryptodev_cb;
 930         crp->crp_session = cse->cses;
 931         crp->crp_opaque = cod;
 932
 933         if (cop->iv) {
 934                 if (crde == NULL) {
 935                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 936                         error = EINVAL;
 937                         goto bail;
 938                 }
 939                 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 940                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 941                         error = EINVAL;
 942                         goto bail;
 943                 }
 944                 if ((error = copyin(cop->iv, crde->crd_iv,
 945                     cse->txform->ivsize))) {
 946                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 947                         goto bail;
 948                 }
 949                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
 950                 crde->crd_skip = 0;
 951         } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 952                 crde->crd_skip = 0;
 953         } else if (crde) {
 954                 crde->crd_flags |= CRD_F_IV_PRESENT;
 955                 crde->crd_skip = cse->txform->ivsize;
 956                 crde->crd_len -= cse->txform->ivsize;
 957         }
 958
 959         if (cop->mac && crda == NULL) {
 960                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 961                 error = EINVAL;
 962                 goto bail;
 963         }
 964         cryptodev_warn(cse);
 965
 966 again:
 967         /*
 968          * Let the dispatch run unlocked, then, interlock against the
 969          * callback before checking if the operation completed and going
 970          * to sleep.  This insures drivers don't inherit our lock which
 971          * results in a lock order reversal between crypto_dispatch forced
 972          * entry and the crypto_done callback into us.
 973          */
 974         error = crypto_dispatch(crp);
 975         if (error != 0) {
 976                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 977                 goto bail;
 978         }
 979
 980         mtx_lock(&cse->lock);
 981         while (!cod->done)
 982                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
 983         mtx_unlock(&cse->lock);
 984
 985         if (crp->crp_etype == EAGAIN) {
 986                 crp->crp_etype = 0;
 987                 crp->crp_flags &= ~CRYPTO_F_DONE;
 988                 cod->done = false;
 989                 goto again;
 990         }
 991
 992         if (crp->crp_etype != 0) {
 993                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 994                 error = crp->crp_etype;
 995                 goto bail;
 996         }
 997
 998         if (cop->dst &&
 999             (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
1000             cop->len))) {
1001                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1002                 goto bail;
1003         }
1004
1005         if (cop->mac &&
1006             (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
1007             cop->mac, cse->thash->hashsize))) {
1008                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1009                 goto bail;
1010         }
1011
1012 bail:
1013         if (crp)
1014                 crypto_freereq(crp);
1015         if (cod)
1016                 cod_free(cod);
1017
1018         return (error);
1019 }
1020
1021 static int
1022 cryptodev_aead(
1023         struct csession *cse,
1024         struct crypt_aead *caead,
1025         struct ucred *active_cred,
1026         struct thread *td)
1027 {
1028         struct cryptop_data *cod = NULL;
1029         struct cryptop *crp = NULL;
1030         struct cryptodesc *crde = NULL, *crda = NULL;
1031         int error;
1032
1033         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1034                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1035                 return (E2BIG);
1036         }
1037
1038         if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
1039             (caead->len % cse->txform->blocksize) != 0) {
1040                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1041                 return (EINVAL);
1042         }
1043
1044         cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
1045             td);
1046
1047         crp = crypto_getreq(2);
1048         if (crp == NULL) {
1049                 error = ENOMEM;
1050                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1051                 goto bail;
1052         }
1053
1054         if (caead->flags & COP_F_CIPHER_FIRST) {
1055                 crde = crp->crp_desc;
1056                 crda = crde->crd_next;
1057         } else {
1058                 crda = crp->crp_desc;
1059                 crde = crda->crd_next;
1060         }
1061
1062         if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
1063             caead->aadlen))) {
1064                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1065                 goto bail;
1066         }
1067
1068         if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
1069             caead->aadlen, caead->len))) {
1070                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1071                 goto bail;
1072         }
1073
1074         /*
1075          * For GCM/CCM, crd_len covers only the AAD.  For other ciphers
1076          * chained with an HMAC, crd_len covers both the AAD and the
1077          * cipher text.
1078          */
1079         crda->crd_skip = 0;
1080         if (cse->cipher == CRYPTO_AES_NIST_GCM_16 ||
1081             cse->cipher == CRYPTO_AES_CCM_16)
1082                 crda->crd_len = caead->aadlen;
1083         else
1084                 crda->crd_len = caead->aadlen + caead->len;
1085         crda->crd_inject = caead->aadlen + caead->len;
1086
1087         crda->crd_alg = cse->mac;
1088         crda->crd_key = cse->mackey;
1089         crda->crd_klen = cse->mackeylen * 8;
1090
1091         if (caead->op == COP_ENCRYPT)
1092                 crde->crd_flags |= CRD_F_ENCRYPT;
1093         else
1094                 crde->crd_flags &= ~CRD_F_ENCRYPT;
1095         crde->crd_skip = caead->aadlen;
1096         crde->crd_len = caead->len;
1097         crde->crd_inject = caead->aadlen;
1098
1099         crde->crd_alg = cse->cipher;
1100         crde->crd_key = cse->key;
1101         crde->crd_klen = cse->keylen * 8;
1102
1103         crp->crp_ilen = caead->aadlen + caead->len;
1104         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1105                        | (caead->flags & COP_F_BATCH);
1106         crp->crp_uio = &cod->uio;
1107         crp->crp_callback = cryptodev_cb;
1108         crp->crp_session = cse->cses;
1109         crp->crp_opaque = cod;
1110
1111         if (caead->iv) {
1112                 if (caead->ivlen > sizeof(crde->crd_iv)) {
1113                         error = EINVAL;
1114                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1115                         goto bail;
1116                 }
1117
1118                 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1119                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1120                         goto bail;
1121                 }
1122                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1123         } else {
1124                 crde->crd_flags |= CRD_F_IV_PRESENT;
1125                 crde->crd_skip += cse->txform->ivsize;
1126                 crde->crd_len -= cse->txform->ivsize;
1127         }
1128
1129         if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1130             caead->len + caead->aadlen, cse->thash->hashsize))) {
1131                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1132                 goto bail;
1133         }
1134         cryptodev_warn(cse);
1135 again:
1136         /*
1137          * Let the dispatch run unlocked, then, interlock against the
1138          * callback before checking if the operation completed and going
1139          * to sleep.  This insures drivers don't inherit our lock which
1140          * results in a lock order reversal between crypto_dispatch forced
1141          * entry and the crypto_done callback into us.
1142          */
1143         error = crypto_dispatch(crp);
1144         if (error != 0) {
1145                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1146                 goto bail;
1147         }
1148
1149         mtx_lock(&cse->lock);
1150         while (!cod->done)
1151                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1152         mtx_unlock(&cse->lock);
1153
1154         if (crp->crp_etype == EAGAIN) {
1155                 crp->crp_etype = 0;
1156                 crp->crp_flags &= ~CRYPTO_F_DONE;
1157                 cod->done = false;
1158                 goto again;
1159         }
1160
1161         if (crp->crp_etype != 0) {
1162                 error = crp->crp_etype;
1163                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1164                 goto bail;
1165         }
1166
1167         if (caead->dst && (error = copyout(
1168             (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1169             caead->len))) {
1170                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1171                 goto bail;
1172         }
1173
1174         if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1175             caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1176                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1177                 goto bail;
1178         }
1179
1180 bail:
1181         crypto_freereq(crp);
1182         if (cod)
1183                 cod_free(cod);
1184
1185         return (error);
1186 }
1187
1188 static int
1189 cryptodev_cb(struct cryptop *crp)
1190 {
1191         struct cryptop_data *cod = crp->crp_opaque;
1192
1193         /*
1194          * Lock to ensure the wakeup() is not missed by the loops
1195          * waiting on cod->done in cryptodev_op() and
1196          * cryptodev_aead().
1197          */
1198         mtx_lock(&cod->cse->lock);
1199         cod->done = true;
1200         mtx_unlock(&cod->cse->lock);
1201         wakeup(cod);
1202         return (0);
1203 }
1204
1205 static int
1206 cryptodevkey_cb(void *op)
1207 {
1208         struct cryptkop *krp = (struct cryptkop *) op;
1209
1210         wakeup_one(krp);
1211         return (0);
1212 }
1213
1214 static int
1215 cryptodev_key(struct crypt_kop *kop)
1216 {
1217         struct cryptkop *krp = NULL;
1218         int error = EINVAL;
1219         int in, out, size, i;
1220
1221         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1222                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1223                 return (EFBIG);
1224         }
1225
1226         in = kop->crk_iparams;
1227         out = kop->crk_oparams;
1228         switch (kop->crk_op) {
1229         case CRK_MOD_EXP:
1230                 if (in == 3 && out == 1)
1231                         break;
1232                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1233                 return (EINVAL);
1234         case CRK_MOD_EXP_CRT:
1235                 if (in == 6 && out == 1)
1236                         break;
1237                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1238                 return (EINVAL);
1239         case CRK_DSA_SIGN:
1240                 if (in == 5 && out == 2)
1241                         break;
1242                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1243                 return (EINVAL);
1244         case CRK_DSA_VERIFY:
1245                 if (in == 7 && out == 0)
1246                         break;
1247                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1248                 return (EINVAL);
1249         case CRK_DH_COMPUTE_KEY:
1250                 if (in == 3 && out == 1)
1251                         break;
1252                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1253                 return (EINVAL);
1254         default:
1255                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1256                 return (EINVAL);
1257         }
1258
1259         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1260         if (!krp) {
1261                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1262                 return (ENOMEM);
1263         }
1264         krp->krp_op = kop->crk_op;
1265         krp->krp_status = kop->crk_status;
1266         krp->krp_iparams = kop->crk_iparams;
1267         krp->krp_oparams = kop->crk_oparams;
1268         krp->krp_crid = kop->crk_crid;
1269         krp->krp_status = 0;
1270         krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1271
1272         for (i = 0; i < CRK_MAXPARAM; i++) {
1273                 if (kop->crk_param[i].crp_nbits > 65536) {
1274                         /* Limit is the same as in OpenBSD */
1275                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1276                         goto fail;
1277                 }
1278                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1279         }
1280         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1281                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1282                 if (size == 0)
1283                         continue;
1284                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1285                 if (i >= krp->krp_iparams)
1286                         continue;
1287                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1288                 if (error) {
1289                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1290                         goto fail;
1291                 }
1292         }
1293
1294         error = crypto_kdispatch(krp);
1295         if (error) {
1296                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1297                 goto fail;
1298         }
1299         error = tsleep(krp, PSOCK, "crydev", 0);
1300         if (error) {
1301                 /* XXX can this happen?  if so, how do we recover? */
1302                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1303                 goto fail;
1304         }
1305
1306         kop->crk_crid = krp->krp_crid;          /* device that did the work */
1307         if (krp->krp_status != 0) {
1308                 error = krp->krp_status;
1309                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1310                 goto fail;
1311         }
1312
1313         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1314                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1315                 if (size == 0)
1316                         continue;
1317                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1318                 if (error) {
1319                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1320                         goto fail;
1321                 }
1322         }
1323
1324 fail:
1325         if (krp) {
1326                 kop->crk_status = krp->krp_status;
1327                 for (i = 0; i < CRK_MAXPARAM; i++) {
1328                         if (krp->krp_param[i].crp_p)
1329                                 free(krp->krp_param[i].crp_p, M_XDATA);
1330                 }
1331                 free(krp, M_XDATA);
1332         }
1333         return (error);
1334 }
1335
1336 static int
1337 cryptodev_find(struct crypt_find_op *find)
1338 {
1339         device_t dev;
1340         size_t fnlen = sizeof find->name;
1341
1342         if (find->crid != -1) {
1343                 dev = crypto_find_device_byhid(find->crid);
1344                 if (dev == NULL)
1345                         return (ENOENT);
1346                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1347                 find->name[fnlen - 1] = '\x0';
1348         } else {
1349                 find->name[fnlen - 1] = '\x0';
1350                 find->crid = crypto_find_driver(find->name);
1351                 if (find->crid == -1)
1352                         return (ENOENT);
1353         }
1354         return (0);
1355 }
1356
1357 /* ARGSUSED */
1358 static int
1359 cryptof_stat(
1360         struct file *fp,
1361         struct stat *sb,
1362         struct ucred *active_cred,
1363         struct thread *td)
1364 {
1365
1366         return (EOPNOTSUPP);
1367 }
1368
1369 /* ARGSUSED */
1370 static int
1371 cryptof_close(struct file *fp, struct thread *td)
1372 {
1373         struct fcrypt *fcr = fp->f_data;
1374         struct csession *cse;
1375
1376         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1377                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1378                 KASSERT(cse->refs == 1,
1379                     ("%s: crypto session %p with %d refs", __func__, cse,
1380                     cse->refs));
1381                 csefree(cse);
1382         }
1383         free(fcr, M_XDATA);
1384         fp->f_data = NULL;
1385         return 0;
1386 }
1387
1388 static int
1389 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1390 {
1391
1392         kif->kf_type = KF_TYPE_CRYPTO;
1393         return (0);
1394 }
1395
1396 static struct csession *
1397 csefind(struct fcrypt *fcr, u_int ses)
1398 {
1399         struct csession *cse;
1400
1401         mtx_lock(&fcr->lock);
1402         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1403                 if (cse->ses == ses) {
1404                         refcount_acquire(&cse->refs);
1405                         mtx_unlock(&fcr->lock);
1406                         return (cse);
1407                 }
1408         }
1409         mtx_unlock(&fcr->lock);
1410         return (NULL);
1411 }
1412
1413 static bool
1414 csedelete(struct fcrypt *fcr, u_int ses)
1415 {
1416         struct csession *cse;
1417
1418         mtx_lock(&fcr->lock);
1419         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1420                 if (cse->ses == ses) {
1421                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1422                         mtx_unlock(&fcr->lock);
1423                         csefree(cse);
1424                         return (true);
1425                 }
1426         }
1427         mtx_unlock(&fcr->lock);
1428         return (false);
1429 }
1430
1431 struct csession *
1432 csecreate(struct fcrypt *fcr, crypto_session_t cses, caddr_t key, u_int64_t keylen,
1433     caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1434     struct enc_xform *txform, struct auth_hash *thash)
1435 {
1436         struct csession *cse;
1437
1438         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1439         if (cse == NULL)
1440                 return NULL;
1441         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1442         refcount_init(&cse->refs, 1);
1443         cse->key = key;
1444         cse->keylen = keylen/8;
1445         cse->mackey = mackey;
1446         cse->mackeylen = mackeylen/8;
1447         cse->cses = cses;
1448         cse->cipher = cipher;
1449         cse->mac = mac;
1450         cse->txform = txform;
1451         cse->thash = thash;
1452         mtx_lock(&fcr->lock);
1453         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1454         cse->ses = fcr->sesn++;
1455         mtx_unlock(&fcr->lock);
1456         return (cse);
1457 }
1458
1459 static void
1460 csefree(struct csession *cse)
1461 {
1462
1463         if (!refcount_release(&cse->refs))
1464                 return;
1465         crypto_freesession(cse->cses);
1466         mtx_destroy(&cse->lock);
1467         if (cse->key)
1468                 free(cse->key, M_XDATA);
1469         if (cse->mackey)
1470                 free(cse->mackey, M_XDATA);
1471         free(cse, M_XDATA);
1472 }
1473
1474 static int
1475 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1476 {
1477         struct file *f;
1478         struct fcrypt *fcr;
1479         int fd, error;
1480
1481         switch (cmd) {
1482         case CRIOGET:
1483                 error = falloc_noinstall(td, &f);
1484                 if (error)
1485                         break;
1486
1487                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1488                 TAILQ_INIT(&fcr->csessions);
1489                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1490
1491                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1492                 error = finstall(td, f, &fd, 0, NULL);
1493                 if (error) {
1494                         mtx_destroy(&fcr->lock);
1495                         free(fcr, M_XDATA);
1496                 } else
1497                         *(uint32_t *)data = fd;
1498                 fdrop(f, td);
1499                 break;
1500         case CRIOFINDDEV:
1501                 error = cryptodev_find((struct crypt_find_op *)data);
1502                 break;
1503         case CRIOASYMFEAT:
1504                 error = crypto_getfeat((int *)data);
1505                 break;
1506         default:
1507                 error = EINVAL;
1508                 break;
1509         }
1510         return (error);
1511 }
1512
1513 static struct cdevsw crypto_cdevsw = {
1514         .d_version =    D_VERSION,
1515         .d_ioctl =      cryptoioctl,
1516         .d_name =       "crypto",
1517 };
1518 static struct cdev *crypto_dev;
1519
1520 /*
1521  * Initialization code, both for static and dynamic loading.
1522  */
1523 static int
1524 cryptodev_modevent(module_t mod, int type, void *unused)
1525 {
1526         switch (type) {
1527         case MOD_LOAD:
1528                 if (bootverbose)
1529                         printf("crypto: <crypto device>\n");
1530                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1531                                       UID_ROOT, GID_WHEEL, 0666,
1532                                       "crypto");
1533                 return 0;
1534         case MOD_UNLOAD:
1535                 /*XXX disallow if active sessions */
1536                 destroy_dev(crypto_dev);
1537                 return 0;
1538         }
1539         return EINVAL;
1540 }
1541
1542 static moduledata_t cryptodev_mod = {
1543         "cryptodev",
1544         cryptodev_modevent,
1545         0
1546 };
1547 MODULE_VERSION(cryptodev, 1);
1548 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1549 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1550 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);