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_SHA1_HMAC:
 461                         thash = &auth_hash_hmac_sha1;
 462                         break;
 463                 case CRYPTO_SHA2_224_HMAC:
 464                         thash = &auth_hash_hmac_sha2_224;
 465                         break;
 466                 case CRYPTO_SHA2_256_HMAC:
 467                         thash = &auth_hash_hmac_sha2_256;
 468                         break;
 469                 case CRYPTO_SHA2_384_HMAC:
 470                         thash = &auth_hash_hmac_sha2_384;
 471                         break;
 472                 case CRYPTO_SHA2_512_HMAC:
 473                         thash = &auth_hash_hmac_sha2_512;
 474                         break;
 475                 case CRYPTO_RIPEMD160_HMAC:
 476                         thash = &auth_hash_hmac_ripemd_160;
 477                         break;
 478                 case CRYPTO_AES_128_NIST_GMAC:
 479                         thash = &auth_hash_nist_gmac_aes_128;
 480                         break;
 481                 case CRYPTO_AES_192_NIST_GMAC:
 482                         thash = &auth_hash_nist_gmac_aes_192;
 483                         break;
 484                 case CRYPTO_AES_256_NIST_GMAC:
 485                         thash = &auth_hash_nist_gmac_aes_256;
 486                         break;
 487
 488 #ifdef notdef
 489                 case CRYPTO_MD5:
 490                         thash = &auth_hash_md5;
 491                         break;
 492 #endif
 493                 case CRYPTO_SHA1:
 494                         thash = &auth_hash_sha1;
 495                         break;
 496                 case CRYPTO_SHA2_224:
 497                         thash = &auth_hash_sha2_224;
 498                         break;
 499                 case CRYPTO_SHA2_256:
 500                         thash = &auth_hash_sha2_256;
 501                         break;
 502                 case CRYPTO_SHA2_384:
 503                         thash = &auth_hash_sha2_384;
 504                         break;
 505                 case CRYPTO_SHA2_512:
 506                         thash = &auth_hash_sha2_512;
 507                         break;
 508
 509                 case CRYPTO_NULL_HMAC:
 510                         thash = &auth_hash_null;
 511                         break;
 512
 513                 case CRYPTO_BLAKE2B:
 514                         thash = &auth_hash_blake2b;
 515                         break;
 516                 case CRYPTO_BLAKE2S:
 517                         thash = &auth_hash_blake2s;
 518                         break;
 519
 520                 default:
 521                         CRYPTDEB("invalid mac");
 522                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 523                         return (EINVAL);
 524                 }
 525
 526                 bzero(&crie, sizeof(crie));
 527                 bzero(&cria, sizeof(cria));
 528
 529                 if (txform) {
 530                         crie.cri_alg = txform->type;
 531                         crie.cri_klen = sop->keylen * 8;
 532                         if (sop->keylen > txform->maxkey ||
 533                             sop->keylen < txform->minkey) {
 534                                 CRYPTDEB("invalid cipher parameters");
 535                                 error = EINVAL;
 536                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 537                                     __LINE__);
 538                                 goto bail;
 539                         }
 540
 541                         crie.cri_key = malloc(crie.cri_klen / 8,
 542                             M_XDATA, M_WAITOK);
 543                         if ((error = copyin(sop->key, crie.cri_key,
 544                             crie.cri_klen / 8))) {
 545                                 CRYPTDEB("invalid key");
 546                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 547                                     __LINE__);
 548                                 goto bail;
 549                         }
 550                         if (thash)
 551                                 crie.cri_next = &cria;
 552                 }
 553
 554                 if (thash) {
 555                         cria.cri_alg = thash->type;
 556                         cria.cri_klen = sop->mackeylen * 8;
 557                         if (thash->keysize != 0 &&
 558                             sop->mackeylen > thash->keysize) {
 559                                 CRYPTDEB("invalid mac key length");
 560                                 error = EINVAL;
 561                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 562                                     __LINE__);
 563                                 goto bail;
 564                         }
 565
 566                         if (cria.cri_klen) {
 567                                 cria.cri_key = malloc(cria.cri_klen / 8,
 568                                     M_XDATA, M_WAITOK);
 569                                 if ((error = copyin(sop->mackey, cria.cri_key,
 570                                     cria.cri_klen / 8))) {
 571                                         CRYPTDEB("invalid mac key");
 572                                         SDT_PROBE1(opencrypto, dev, ioctl,
 573                                             error, __LINE__);
 574                                         goto bail;
 575                                 }
 576                         }
 577                 }
 578
 579                 /* NB: CIOCGSESSION2 has the crid */
 580                 if (cmd == CIOCGSESSION2
 581 #ifdef COMPAT_FREEBSD32
 582                     || cmd == CIOCGSESSION232
 583 #endif
 584                         ) {
 585                         crid = SES2(sop)->crid;
 586                         error = checkforsoftware(&crid);
 587                         if (error) {
 588                                 CRYPTDEB("checkforsoftware");
 589                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 590                                     __LINE__);
 591                                 goto bail;
 592                         }
 593                 } else
 594                         crid = CRYPTOCAP_F_HARDWARE;
 595                 error = crypto_newsession(&cses, (txform ? &crie : &cria), crid);
 596                 if (error) {
 597                         CRYPTDEB("crypto_newsession");
 598                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 599                         goto bail;
 600                 }
 601
 602                 cse = csecreate(fcr, cses, crie.cri_key, crie.cri_klen,
 603                     cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
 604                     thash);
 605
 606                 if (cse == NULL) {
 607                         crypto_freesession(cses);
 608                         error = EINVAL;
 609                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 610                         CRYPTDEB("csecreate");
 611                         goto bail;
 612                 }
 613                 sop->ses = cse->ses;
 614                 if (cmd == CIOCGSESSION2
 615 #ifdef COMPAT_FREEBSD32
 616                     || cmd == CIOCGSESSION232
 617 #endif
 618                     ) {
 619                         /* return hardware/driver id */
 620                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 621                 }
 622 bail:
 623                 if (error) {
 624                         if (crie.cri_key)
 625                                 free(crie.cri_key, M_XDATA);
 626                         if (cria.cri_key)
 627                                 free(cria.cri_key, M_XDATA);
 628                 }
 629 #ifdef COMPAT_FREEBSD32
 630                 else {
 631                         if (cmd == CIOCGSESSION32)
 632                                 session_op_to_32(sop, data);
 633                         else if (cmd == CIOCGSESSION232)
 634                                 session2_op_to_32((struct session2_op *)sop,
 635                                     data);
 636                 }
 637 #endif
 638                 break;
 639         case CIOCFSESSION:
 640                 ses = *(u_int32_t *)data;
 641                 cse = csefind(fcr, ses);
 642                 if (cse == NULL) {
 643                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 644                         return (EINVAL);
 645                 }
 646                 csedelete(fcr, cse);
 647                 csefree(cse);
 648                 break;
 649         case CIOCCRYPT:
 650 #ifdef COMPAT_FREEBSD32
 651         case CIOCCRYPT32:
 652                 if (cmd == CIOCCRYPT32) {
 653                         cop = &copc;
 654                         crypt_op_from_32(data, cop);
 655                 } else
 656 #endif
 657                         cop = (struct crypt_op *)data;
 658                 cse = csefind(fcr, cop->ses);
 659                 if (cse == NULL) {
 660                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 661                         return (EINVAL);
 662                 }
 663                 error = cryptodev_op(cse, cop, active_cred, td);
 664 #ifdef COMPAT_FREEBSD32
 665                 if (error == 0 && cmd == CIOCCRYPT32)
 666                         crypt_op_to_32(cop, data);
 667 #endif
 668                 break;
 669         case CIOCKEY:
 670         case CIOCKEY2:
 671 #ifdef COMPAT_FREEBSD32
 672         case CIOCKEY32:
 673         case CIOCKEY232:
 674 #endif
 675                 if (!crypto_userasymcrypto) {
 676                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 677                         return (EPERM);         /* XXX compat? */
 678                 }
 679 #ifdef COMPAT_FREEBSD32
 680                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 681                         kop = &kopc;
 682                         crypt_kop_from_32(data, kop);
 683                 } else
 684 #endif
 685                         kop = (struct crypt_kop *)data;
 686                 if (cmd == CIOCKEY
 687 #ifdef COMPAT_FREEBSD32
 688                     || cmd == CIOCKEY32
 689 #endif
 690                     ) {
 691                         /* NB: crypto core enforces s/w driver use */
 692                         kop->crk_crid =
 693                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 694                 }
 695                 mtx_lock(&Giant);
 696                 error = cryptodev_key(kop);
 697                 mtx_unlock(&Giant);
 698 #ifdef COMPAT_FREEBSD32
 699                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 700                         crypt_kop_to_32(kop, data);
 701 #endif
 702                 break;
 703         case CIOCASYMFEAT:
 704                 if (!crypto_userasymcrypto) {
 705                         /*
 706                          * NB: if user asym crypto operations are
 707                          * not permitted return "no algorithms"
 708                          * so well-behaved applications will just
 709                          * fallback to doing them in software.
 710                          */
 711                         *(int *)data = 0;
 712                 } else {
 713                         error = crypto_getfeat((int *)data);
 714                         if (error)
 715                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 716                                     __LINE__);
 717                 }
 718                 break;
 719         case CIOCFINDDEV:
 720                 error = cryptodev_find((struct crypt_find_op *)data);
 721                 break;
 722         case CIOCCRYPTAEAD:
 723                 caead = (struct crypt_aead *)data;
 724                 cse = csefind(fcr, caead->ses);
 725                 if (cse == NULL) {
 726                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 727                         return (EINVAL);
 728                 }
 729                 error = cryptodev_aead(cse, caead, active_cred, td);
 730                 break;
 731         default:
 732                 error = EINVAL;
 733                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 734                 break;
 735         }
 736         return (error);
 737 #undef SES2
 738 }
 739
 740 static int cryptodev_cb(struct cryptop *);
 741
 742 static struct cryptop_data *
 743 cod_alloc(struct csession *cse, size_t len, struct thread *td)
 744 {
 745         struct cryptop_data *cod;
 746         struct uio *uio;
 747
 748         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 749
 750         cod->cse = cse;
 751         uio = &cod->uio;
 752         uio->uio_iov = cod->iovec;
 753         uio->uio_iovcnt = 1;
 754         uio->uio_resid = len;
 755         uio->uio_segflg = UIO_SYSSPACE;
 756         uio->uio_rw = UIO_WRITE;
 757         uio->uio_td = td;
 758         uio->uio_iov[0].iov_len = len;
 759         uio->uio_iov[0].iov_base = malloc(len, M_XDATA, M_WAITOK);
 760         return (cod);
 761 }
 762
 763 static void
 764 cod_free(struct cryptop_data *cod)
 765 {
 766
 767         free(cod->uio.uio_iov[0].iov_base, M_XDATA);
 768         free(cod, M_XDATA);
 769 }
 770
 771 static int
 772 cryptodev_op(
 773         struct csession *cse,
 774         struct crypt_op *cop,
 775         struct ucred *active_cred,
 776         struct thread *td)
 777 {
 778         struct cryptop_data *cod = NULL;
 779         struct cryptop *crp = NULL;
 780         struct cryptodesc *crde = NULL, *crda = NULL;
 781         int error;
 782
 783         if (cop->len > 256*1024-4) {
 784                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 785                 return (E2BIG);
 786         }
 787
 788         if (cse->txform) {
 789                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 790                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 791                         return (EINVAL);
 792                 }
 793         }
 794
 795         if (cse->thash)
 796                 cod = cod_alloc(cse, cop->len + cse->thash->hashsize, td);
 797         else
 798                 cod = cod_alloc(cse, cop->len, td);
 799
 800         crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
 801         if (crp == NULL) {
 802                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 803                 error = ENOMEM;
 804                 goto bail;
 805         }
 806
 807         if (cse->thash && cse->txform) {
 808                 if (cop->flags & COP_F_CIPHER_FIRST) {
 809                         crde = crp->crp_desc;
 810                         crda = crde->crd_next;
 811                 } else {
 812                         crda = crp->crp_desc;
 813                         crde = crda->crd_next;
 814                 }
 815         } else if (cse->thash) {
 816                 crda = crp->crp_desc;
 817         } else if (cse->txform) {
 818                 crde = crp->crp_desc;
 819         } else {
 820                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 821                 error = EINVAL;
 822                 goto bail;
 823         }
 824
 825         if ((error = copyin(cop->src, cod->uio.uio_iov[0].iov_base,
 826             cop->len))) {
 827                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 828                 goto bail;
 829         }
 830
 831         if (crda) {
 832                 crda->crd_skip = 0;
 833                 crda->crd_len = cop->len;
 834                 crda->crd_inject = cop->len;
 835
 836                 crda->crd_alg = cse->mac;
 837                 crda->crd_key = cse->mackey;
 838                 crda->crd_klen = cse->mackeylen * 8;
 839         }
 840
 841         if (crde) {
 842                 if (cop->op == COP_ENCRYPT)
 843                         crde->crd_flags |= CRD_F_ENCRYPT;
 844                 else
 845                         crde->crd_flags &= ~CRD_F_ENCRYPT;
 846                 crde->crd_len = cop->len;
 847                 crde->crd_inject = 0;
 848
 849                 crde->crd_alg = cse->cipher;
 850                 crde->crd_key = cse->key;
 851                 crde->crd_klen = cse->keylen * 8;
 852         }
 853
 854         crp->crp_ilen = cop->len;
 855         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
 856                        | (cop->flags & COP_F_BATCH);
 857         crp->crp_uio = &cod->uio;
 858         crp->crp_callback = cryptodev_cb;
 859         crp->crp_session = cse->cses;
 860         crp->crp_opaque = cod;
 861
 862         if (cop->iv) {
 863                 if (crde == NULL) {
 864                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 865                         error = EINVAL;
 866                         goto bail;
 867                 }
 868                 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 869                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 870                         error = EINVAL;
 871                         goto bail;
 872                 }
 873                 if ((error = copyin(cop->iv, crde->crd_iv,
 874                     cse->txform->ivsize))) {
 875                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 876                         goto bail;
 877                 }
 878                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
 879                 crde->crd_skip = 0;
 880         } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
 881                 crde->crd_skip = 0;
 882         } else if (crde) {
 883                 crde->crd_flags |= CRD_F_IV_PRESENT;
 884                 crde->crd_skip = cse->txform->ivsize;
 885                 crde->crd_len -= cse->txform->ivsize;
 886         }
 887
 888         if (cop->mac && crda == NULL) {
 889                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 890                 error = EINVAL;
 891                 goto bail;
 892         }
 893
 894 again:
 895         /*
 896          * Let the dispatch run unlocked, then, interlock against the
 897          * callback before checking if the operation completed and going
 898          * to sleep.  This insures drivers don't inherit our lock which
 899          * results in a lock order reversal between crypto_dispatch forced
 900          * entry and the crypto_done callback into us.
 901          */
 902         error = crypto_dispatch(crp);
 903         if (error != 0) {
 904                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 905                 goto bail;
 906         }
 907
 908         mtx_lock(&cse->lock);
 909         while (!cod->done)
 910                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
 911         mtx_unlock(&cse->lock);
 912
 913         if (crp->crp_etype == EAGAIN) {
 914                 crp->crp_etype = 0;
 915                 crp->crp_flags &= ~CRYPTO_F_DONE;
 916                 cod->done = false;
 917                 goto again;
 918         }
 919
 920         if (crp->crp_etype != 0) {
 921                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 922                 error = crp->crp_etype;
 923                 goto bail;
 924         }
 925
 926         if (cop->dst &&
 927             (error = copyout(cod->uio.uio_iov[0].iov_base, cop->dst,
 928             cop->len))) {
 929                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 930                 goto bail;
 931         }
 932
 933         if (cop->mac &&
 934             (error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base + cop->len,
 935             cop->mac, cse->thash->hashsize))) {
 936                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 937                 goto bail;
 938         }
 939
 940 bail:
 941         if (crp)
 942                 crypto_freereq(crp);
 943         if (cod)
 944                 cod_free(cod);
 945
 946         return (error);
 947 }
 948
 949 static int
 950 cryptodev_aead(
 951         struct csession *cse,
 952         struct crypt_aead *caead,
 953         struct ucred *active_cred,
 954         struct thread *td)
 955 {
 956         struct cryptop_data *cod = NULL;
 957         struct cryptop *crp = NULL;
 958         struct cryptodesc *crde = NULL, *crda = NULL;
 959         int error;
 960
 961         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
 962                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 963                 return (E2BIG);
 964         }
 965
 966         if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
 967             (caead->len % cse->txform->blocksize) != 0) {
 968                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 969                 return (EINVAL);
 970         }
 971
 972         cod = cod_alloc(cse, caead->aadlen + caead->len + cse->thash->hashsize,
 973             td);
 974
 975         crp = crypto_getreq(2);
 976         if (crp == NULL) {
 977                 error = ENOMEM;
 978                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 979                 goto bail;
 980         }
 981
 982         if (caead->flags & COP_F_CIPHER_FIRST) {
 983                 crde = crp->crp_desc;
 984                 crda = crde->crd_next;
 985         } else {
 986                 crda = crp->crp_desc;
 987                 crde = crda->crd_next;
 988         }
 989
 990         if ((error = copyin(caead->aad, cod->uio.uio_iov[0].iov_base,
 991             caead->aadlen))) {
 992                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 993                 goto bail;
 994         }
 995
 996         if ((error = copyin(caead->src, (char *)cod->uio.uio_iov[0].iov_base +
 997             caead->aadlen, caead->len))) {
 998                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 999                 goto bail;
1000         }
1001
1002         /*
1003          * For GCM, crd_len covers only the AAD.  For other ciphers
1004          * chained with an HMAC, crd_len covers both the AAD and the
1005          * cipher text.
1006          */
1007         crda->crd_skip = 0;
1008         if (cse->cipher == CRYPTO_AES_NIST_GCM_16)
1009                 crda->crd_len = caead->aadlen;
1010         else
1011                 crda->crd_len = caead->aadlen + caead->len;
1012         crda->crd_inject = caead->aadlen + caead->len;
1013
1014         crda->crd_alg = cse->mac;
1015         crda->crd_key = cse->mackey;
1016         crda->crd_klen = cse->mackeylen * 8;
1017
1018         if (caead->op == COP_ENCRYPT)
1019                 crde->crd_flags |= CRD_F_ENCRYPT;
1020         else
1021                 crde->crd_flags &= ~CRD_F_ENCRYPT;
1022         crde->crd_skip = caead->aadlen;
1023         crde->crd_len = caead->len;
1024         crde->crd_inject = caead->aadlen;
1025
1026         crde->crd_alg = cse->cipher;
1027         crde->crd_key = cse->key;
1028         crde->crd_klen = cse->keylen * 8;
1029
1030         crp->crp_ilen = caead->aadlen + caead->len;
1031         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
1032                        | (caead->flags & COP_F_BATCH);
1033         crp->crp_uio = &cod->uio;
1034         crp->crp_callback = cryptodev_cb;
1035         crp->crp_session = cse->cses;
1036         crp->crp_opaque = cod;
1037
1038         if (caead->iv) {
1039                 if (caead->ivlen > sizeof(crde->crd_iv)) {
1040                         error = EINVAL;
1041                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1042                         goto bail;
1043                 }
1044
1045                 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
1046                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1047                         goto bail;
1048                 }
1049                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
1050         } else {
1051                 crde->crd_flags |= CRD_F_IV_PRESENT;
1052                 crde->crd_skip += cse->txform->ivsize;
1053                 crde->crd_len -= cse->txform->ivsize;
1054         }
1055
1056         if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +
1057             caead->len + caead->aadlen, cse->thash->hashsize))) {
1058                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1059                 goto bail;
1060         }
1061 again:
1062         /*
1063          * Let the dispatch run unlocked, then, interlock against the
1064          * callback before checking if the operation completed and going
1065          * to sleep.  This insures drivers don't inherit our lock which
1066          * results in a lock order reversal between crypto_dispatch forced
1067          * entry and the crypto_done callback into us.
1068          */
1069         error = crypto_dispatch(crp);
1070         if (error != 0) {
1071                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1072                 goto bail;
1073         }
1074
1075         mtx_lock(&cse->lock);
1076         while (!cod->done)
1077                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1078         mtx_unlock(&cse->lock);
1079
1080         if (crp->crp_etype == EAGAIN) {
1081                 crp->crp_etype = 0;
1082                 crp->crp_flags &= ~CRYPTO_F_DONE;
1083                 cod->done = false;
1084                 goto again;
1085         }
1086
1087         if (crp->crp_etype != 0) {
1088                 error = crp->crp_etype;
1089                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1090                 goto bail;
1091         }
1092
1093         if (caead->dst && (error = copyout(
1094             (caddr_t)cod->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
1095             caead->len))) {
1096                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1097                 goto bail;
1098         }
1099
1100         if ((error = copyout((caddr_t)cod->uio.uio_iov[0].iov_base +
1101             caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
1102                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1103                 goto bail;
1104         }
1105
1106 bail:
1107         crypto_freereq(crp);
1108         if (cod)
1109                 cod_free(cod);
1110
1111         return (error);
1112 }
1113
1114 static int
1115 cryptodev_cb(struct cryptop *crp)
1116 {
1117         struct cryptop_data *cod = crp->crp_opaque;
1118
1119         /*
1120          * Lock to ensure the wakeup() is not missed by the loops
1121          * waiting on cod->done in cryptodev_op() and
1122          * cryptodev_aead().
1123          */
1124         mtx_lock(&cod->cse->lock);
1125         cod->done = true;
1126         mtx_unlock(&cod->cse->lock);
1127         wakeup(cod);
1128         return (0);
1129 }
1130
1131 static int
1132 cryptodevkey_cb(void *op)
1133 {
1134         struct cryptkop *krp = (struct cryptkop *) op;
1135
1136         wakeup_one(krp);
1137         return (0);
1138 }
1139
1140 static int
1141 cryptodev_key(struct crypt_kop *kop)
1142 {
1143         struct cryptkop *krp = NULL;
1144         int error = EINVAL;
1145         int in, out, size, i;
1146
1147         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1148                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1149                 return (EFBIG);
1150         }
1151
1152         in = kop->crk_iparams;
1153         out = kop->crk_oparams;
1154         switch (kop->crk_op) {
1155         case CRK_MOD_EXP:
1156                 if (in == 3 && out == 1)
1157                         break;
1158                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1159                 return (EINVAL);
1160         case CRK_MOD_EXP_CRT:
1161                 if (in == 6 && out == 1)
1162                         break;
1163                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1164                 return (EINVAL);
1165         case CRK_DSA_SIGN:
1166                 if (in == 5 && out == 2)
1167                         break;
1168                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1169                 return (EINVAL);
1170         case CRK_DSA_VERIFY:
1171                 if (in == 7 && out == 0)
1172                         break;
1173                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1174                 return (EINVAL);
1175         case CRK_DH_COMPUTE_KEY:
1176                 if (in == 3 && out == 1)
1177                         break;
1178                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1179                 return (EINVAL);
1180         default:
1181                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1182                 return (EINVAL);
1183         }
1184
1185         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1186         if (!krp) {
1187                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1188                 return (ENOMEM);
1189         }
1190         krp->krp_op = kop->crk_op;
1191         krp->krp_status = kop->crk_status;
1192         krp->krp_iparams = kop->crk_iparams;
1193         krp->krp_oparams = kop->crk_oparams;
1194         krp->krp_crid = kop->crk_crid;
1195         krp->krp_status = 0;
1196         krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
1197
1198         for (i = 0; i < CRK_MAXPARAM; i++) {
1199                 if (kop->crk_param[i].crp_nbits > 65536) {
1200                         /* Limit is the same as in OpenBSD */
1201                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1202                         goto fail;
1203                 }
1204                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1205         }
1206         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1207                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1208                 if (size == 0)
1209                         continue;
1210                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1211                 if (i >= krp->krp_iparams)
1212                         continue;
1213                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1214                 if (error) {
1215                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1216                         goto fail;
1217                 }
1218         }
1219
1220         error = crypto_kdispatch(krp);
1221         if (error) {
1222                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1223                 goto fail;
1224         }
1225         error = tsleep(krp, PSOCK, "crydev", 0);
1226         if (error) {
1227                 /* XXX can this happen?  if so, how do we recover? */
1228                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1229                 goto fail;
1230         }
1231
1232         kop->crk_crid = krp->krp_crid;          /* device that did the work */
1233         if (krp->krp_status != 0) {
1234                 error = krp->krp_status;
1235                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1236                 goto fail;
1237         }
1238
1239         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1240                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1241                 if (size == 0)
1242                         continue;
1243                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1244                 if (error) {
1245                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1246                         goto fail;
1247                 }
1248         }
1249
1250 fail:
1251         if (krp) {
1252                 kop->crk_status = krp->krp_status;
1253                 for (i = 0; i < CRK_MAXPARAM; i++) {
1254                         if (krp->krp_param[i].crp_p)
1255                                 free(krp->krp_param[i].crp_p, M_XDATA);
1256                 }
1257                 free(krp, M_XDATA);
1258         }
1259         return (error);
1260 }
1261
1262 static int
1263 cryptodev_find(struct crypt_find_op *find)
1264 {
1265         device_t dev;
1266         size_t fnlen = sizeof find->name;
1267
1268         if (find->crid != -1) {
1269                 dev = crypto_find_device_byhid(find->crid);
1270                 if (dev == NULL)
1271                         return (ENOENT);
1272                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1273                 find->name[fnlen - 1] = '\x0';
1274         } else {
1275                 find->name[fnlen - 1] = '\x0';
1276                 find->crid = crypto_find_driver(find->name);
1277                 if (find->crid == -1)
1278                         return (ENOENT);
1279         }
1280         return (0);
1281 }
1282
1283 /* ARGSUSED */
1284 static int
1285 cryptof_stat(
1286         struct file *fp,
1287         struct stat *sb,
1288         struct ucred *active_cred,
1289         struct thread *td)
1290 {
1291
1292         return (EOPNOTSUPP);
1293 }
1294
1295 /* ARGSUSED */
1296 static int
1297 cryptof_close(struct file *fp, struct thread *td)
1298 {
1299         struct fcrypt *fcr = fp->f_data;
1300         struct csession *cse;
1301
1302         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1303                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1304                 csefree(cse);
1305         }
1306         free(fcr, M_XDATA);
1307         fp->f_data = NULL;
1308         return 0;
1309 }
1310
1311 static int
1312 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1313 {
1314
1315         kif->kf_type = KF_TYPE_CRYPTO;
1316         return (0);
1317 }
1318
1319 static struct csession *
1320 csefind(struct fcrypt *fcr, u_int ses)
1321 {
1322         struct csession *cse;
1323
1324         TAILQ_FOREACH(cse, &fcr->csessions, next)
1325                 if (cse->ses == ses)
1326                         return (cse);
1327         return (NULL);
1328 }
1329
1330 static int
1331 csedelete(struct fcrypt *fcr, struct csession *cse_del)
1332 {
1333         struct csession *cse;
1334
1335         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1336                 if (cse == cse_del) {
1337                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1338                         return (1);
1339                 }
1340         }
1341         return (0);
1342 }
1343
1344 static struct csession *
1345 cseadd(struct fcrypt *fcr, struct csession *cse)
1346 {
1347         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1348         cse->ses = fcr->sesn++;
1349         return (cse);
1350 }
1351
1352 struct csession *
1353 csecreate(struct fcrypt *fcr, crypto_session_t cses, caddr_t key, u_int64_t keylen,
1354     caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
1355     struct enc_xform *txform, struct auth_hash *thash)
1356 {
1357         struct csession *cse;
1358
1359         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1360         if (cse == NULL)
1361                 return NULL;
1362         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1363         cse->key = key;
1364         cse->keylen = keylen/8;
1365         cse->mackey = mackey;
1366         cse->mackeylen = mackeylen/8;
1367         cse->cses = cses;
1368         cse->cipher = cipher;
1369         cse->mac = mac;
1370         cse->txform = txform;
1371         cse->thash = thash;
1372         cseadd(fcr, cse);
1373         return (cse);
1374 }
1375
1376 static void
1377 csefree(struct csession *cse)
1378 {
1379
1380         crypto_freesession(cse->cses);
1381         mtx_destroy(&cse->lock);
1382         if (cse->key)
1383                 free(cse->key, M_XDATA);
1384         if (cse->mackey)
1385                 free(cse->mackey, M_XDATA);
1386         free(cse, M_XDATA);
1387 }
1388
1389 static int
1390 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
1391 {
1392         return (0);
1393 }
1394
1395 static int
1396 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
1397 {
1398         return (EIO);
1399 }
1400
1401 static int
1402 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
1403 {
1404         return (EIO);
1405 }
1406
1407 static int
1408 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1409 {
1410         struct file *f;
1411         struct fcrypt *fcr;
1412         int fd, error;
1413
1414         switch (cmd) {
1415         case CRIOGET:
1416                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
1417                 TAILQ_INIT(&fcr->csessions);
1418                 fcr->sesn = 0;
1419
1420                 error = falloc(td, &f, &fd, 0);
1421
1422                 if (error) {
1423                         free(fcr, M_XDATA);
1424                         return (error);
1425                 }
1426                 /* falloc automatically provides an extra reference to 'f'. */
1427                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1428                 *(u_int32_t *)data = fd;
1429                 fdrop(f, td);
1430                 break;
1431         case CRIOFINDDEV:
1432                 error = cryptodev_find((struct crypt_find_op *)data);
1433                 break;
1434         case CRIOASYMFEAT:
1435                 error = crypto_getfeat((int *)data);
1436                 break;
1437         default:
1438                 error = EINVAL;
1439                 break;
1440         }
1441         return (error);
1442 }
1443
1444 static struct cdevsw crypto_cdevsw = {
1445         .d_version =    D_VERSION,
1446         .d_flags =      D_NEEDGIANT,
1447         .d_open =       cryptoopen,
1448         .d_read =       cryptoread,
1449         .d_write =      cryptowrite,
1450         .d_ioctl =      cryptoioctl,
1451         .d_name =       "crypto",
1452 };
1453 static struct cdev *crypto_dev;
1454
1455 /*
1456  * Initialization code, both for static and dynamic loading.
1457  */
1458 static int
1459 cryptodev_modevent(module_t mod, int type, void *unused)
1460 {
1461         switch (type) {
1462         case MOD_LOAD:
1463                 if (bootverbose)
1464                         printf("crypto: <crypto device>\n");
1465                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1466                                       UID_ROOT, GID_WHEEL, 0666,
1467                                       "crypto");
1468                 return 0;
1469         case MOD_UNLOAD:
1470                 /*XXX disallow if active sessions */
1471                 destroy_dev(crypto_dev);
1472                 return 0;
1473         }
1474         return EINVAL;
1475 }
1476
1477 static moduledata_t cryptodev_mod = {
1478         "cryptodev",
1479         cryptodev_modevent,
1480         0
1481 };
1482 MODULE_VERSION(cryptodev, 1);
1483 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1484 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1485 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);