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/random.h>
  55 #include <sys/conf.h>
  56 #include <sys/kernel.h>
  57 #include <sys/module.h>
  58 #include <sys/fcntl.h>
  59 #include <sys/bus.h>
  60 #include <sys/user.h>
  61 #include <sys/sdt.h>
  62
  63 #include <opencrypto/cryptodev.h>
  64 #include <opencrypto/xform.h>
  65
  66 SDT_PROVIDER_DECLARE(opencrypto);
  67
  68 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
  69
  70 #ifdef COMPAT_FREEBSD32
  71 #include <sys/mount.h>
  72 #include <compat/freebsd32/freebsd32.h>
  73
  74 struct session_op32 {
  75         u_int32_t       cipher;
  76         u_int32_t       mac;
  77         u_int32_t       keylen;
  78         u_int32_t       key;
  79         int             mackeylen;
  80         u_int32_t       mackey;
  81         u_int32_t       ses;
  82 };
  83
  84 struct session2_op32 {
  85         u_int32_t       cipher;
  86         u_int32_t       mac;
  87         u_int32_t       keylen;
  88         u_int32_t       key;
  89         int             mackeylen;
  90         u_int32_t       mackey;
  91         u_int32_t       ses;
  92         int             crid;
  93         int             pad[4];
  94 };
  95
  96 struct crypt_op32 {
  97         u_int32_t       ses;
  98         u_int16_t       op;
  99         u_int16_t       flags;
 100         u_int           len;
 101         u_int32_t       src, dst;
 102         u_int32_t       mac;
 103         u_int32_t       iv;
 104 };
 105
 106 struct crparam32 {
 107         u_int32_t       crp_p;
 108         u_int           crp_nbits;
 109 };
 110
 111 struct crypt_kop32 {
 112         u_int           crk_op;
 113         u_int           crk_status;
 114         u_short         crk_iparams;
 115         u_short         crk_oparams;
 116         u_int           crk_crid;
 117         struct crparam32        crk_param[CRK_MAXPARAM];
 118 };
 119
 120 struct cryptotstat32 {
 121         struct timespec32       acc;
 122         struct timespec32       min;
 123         struct timespec32       max;
 124         u_int32_t       count;
 125 };
 126
 127 struct cryptostats32 {
 128         u_int32_t       cs_ops;
 129         u_int32_t       cs_errs;
 130         u_int32_t       cs_kops;
 131         u_int32_t       cs_kerrs;
 132         u_int32_t       cs_intrs;
 133         u_int32_t       cs_rets;
 134         u_int32_t       cs_blocks;
 135         u_int32_t       cs_kblocks;
 136         struct cryptotstat32 cs_invoke;
 137         struct cryptotstat32 cs_done;
 138         struct cryptotstat32 cs_cb;
 139         struct cryptotstat32 cs_finis;
 140 };
 141
 142 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
 143 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
 144 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
 145 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
 146 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
 147
 148 static void
 149 session_op_from_32(const struct session_op32 *from, struct session_op *to)
 150 {
 151
 152         CP(*from, *to, cipher);
 153         CP(*from, *to, mac);
 154         CP(*from, *to, keylen);
 155         PTRIN_CP(*from, *to, key);
 156         CP(*from, *to, mackeylen);
 157         PTRIN_CP(*from, *to, mackey);
 158         CP(*from, *to, ses);
 159 }
 160
 161 static void
 162 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
 163 {
 164
 165         session_op_from_32((const struct session_op32 *)from,
 166             (struct session_op *)to);
 167         CP(*from, *to, crid);
 168 }
 169
 170 static void
 171 session_op_to_32(const struct session_op *from, struct session_op32 *to)
 172 {
 173
 174         CP(*from, *to, cipher);
 175         CP(*from, *to, mac);
 176         CP(*from, *to, keylen);
 177         PTROUT_CP(*from, *to, key);
 178         CP(*from, *to, mackeylen);
 179         PTROUT_CP(*from, *to, mackey);
 180         CP(*from, *to, ses);
 181 }
 182
 183 static void
 184 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
 185 {
 186
 187         session_op_to_32((const struct session_op *)from,
 188             (struct session_op32 *)to);
 189         CP(*from, *to, crid);
 190 }
 191
 192 static void
 193 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
 194 {
 195
 196         CP(*from, *to, ses);
 197         CP(*from, *to, op);
 198         CP(*from, *to, flags);
 199         CP(*from, *to, len);
 200         PTRIN_CP(*from, *to, src);
 201         PTRIN_CP(*from, *to, dst);
 202         PTRIN_CP(*from, *to, mac);
 203         PTRIN_CP(*from, *to, iv);
 204 }
 205
 206 static void
 207 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
 208 {
 209
 210         CP(*from, *to, ses);
 211         CP(*from, *to, op);
 212         CP(*from, *to, flags);
 213         CP(*from, *to, len);
 214         PTROUT_CP(*from, *to, src);
 215         PTROUT_CP(*from, *to, dst);
 216         PTROUT_CP(*from, *to, mac);
 217         PTROUT_CP(*from, *to, iv);
 218 }
 219
 220 static void
 221 crparam_from_32(const struct crparam32 *from, struct crparam *to)
 222 {
 223
 224         PTRIN_CP(*from, *to, crp_p);
 225         CP(*from, *to, crp_nbits);
 226 }
 227
 228 static void
 229 crparam_to_32(const struct crparam *from, struct crparam32 *to)
 230 {
 231
 232         PTROUT_CP(*from, *to, crp_p);
 233         CP(*from, *to, crp_nbits);
 234 }
 235
 236 static void
 237 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
 238 {
 239         int i;
 240
 241         CP(*from, *to, crk_op);
 242         CP(*from, *to, crk_status);
 243         CP(*from, *to, crk_iparams);
 244         CP(*from, *to, crk_oparams);
 245         CP(*from, *to, crk_crid);
 246         for (i = 0; i < CRK_MAXPARAM; i++)
 247                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
 248 }
 249
 250 static void
 251 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
 252 {
 253         int i;
 254
 255         CP(*from, *to, crk_op);
 256         CP(*from, *to, crk_status);
 257         CP(*from, *to, crk_iparams);
 258         CP(*from, *to, crk_oparams);
 259         CP(*from, *to, crk_crid);
 260         for (i = 0; i < CRK_MAXPARAM; i++)
 261                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
 262 }
 263 #endif
 264
 265 struct csession {
 266         TAILQ_ENTRY(csession) next;
 267         crypto_session_t cses;
 268         volatile u_int  refs;
 269         u_int32_t       ses;
 270         struct mtx      lock;           /* for op submission */
 271
 272         struct enc_xform *txform;
 273         int             hashsize;
 274         int             ivsize;
 275         int             mode;
 276
 277         void            *key;
 278         void            *mackey;
 279 };
 280
 281 struct cryptop_data {
 282         struct csession *cse;
 283
 284         char            *buf;
 285         bool            done;
 286 };
 287
 288 struct fcrypt {
 289         TAILQ_HEAD(csessionlist, csession) csessions;
 290         int             sesn;
 291         struct mtx      lock;
 292 };
 293
 294 static  int cryptof_ioctl(struct file *, u_long, void *,
 295                     struct ucred *, struct thread *);
 296 static  int cryptof_stat(struct file *, struct stat *,
 297                     struct ucred *, struct thread *);
 298 static  int cryptof_close(struct file *, struct thread *);
 299 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 300                     struct filedesc *);
 301
 302 static struct fileops cryptofops = {
 303     .fo_read = invfo_rdwr,
 304     .fo_write = invfo_rdwr,
 305     .fo_truncate = invfo_truncate,
 306     .fo_ioctl = cryptof_ioctl,
 307     .fo_poll = invfo_poll,
 308     .fo_kqfilter = invfo_kqfilter,
 309     .fo_stat = cryptof_stat,
 310     .fo_close = cryptof_close,
 311     .fo_chmod = invfo_chmod,
 312     .fo_chown = invfo_chown,
 313     .fo_sendfile = invfo_sendfile,
 314     .fo_fill_kinfo = cryptof_fill_kinfo,
 315 };
 316
 317 static struct csession *csefind(struct fcrypt *, u_int);
 318 static bool csedelete(struct fcrypt *, u_int);
 319 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 320     struct crypto_session_params *, struct enc_xform *, void *,
 321     struct auth_hash *, void *);
 322 static void csefree(struct csession *);
 323
 324 static  int cryptodev_op(struct csession *, struct crypt_op *,
 325                         struct ucred *, struct thread *td);
 326 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 327                         struct ucred *, struct thread *);
 328 static  int cryptodev_key(struct crypt_kop *);
 329 static  int cryptodev_find(struct crypt_find_op *);
 330
 331 /*
 332  * Check a crypto identifier to see if it requested
 333  * a software device/driver.  This can be done either
 334  * by device name/class or through search constraints.
 335  */
 336 static int
 337 checkforsoftware(int *cridp)
 338 {
 339         int crid;
 340
 341         crid = *cridp;
 342
 343         if (!crypto_devallowsoft) {
 344                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 345                         if (crid & CRYPTOCAP_F_HARDWARE) {
 346                                 *cridp = CRYPTOCAP_F_HARDWARE;
 347                                 return 0;
 348                         }
 349                         return EINVAL;
 350                 }
 351                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 352                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 353                         return EINVAL;
 354         }
 355         return 0;
 356 }
 357
 358 /* ARGSUSED */
 359 static int
 360 cryptof_ioctl(
 361         struct file *fp,
 362         u_long cmd,
 363         void *data,
 364         struct ucred *active_cred,
 365         struct thread *td)
 366 {
 367 #define SES2(p) ((struct session2_op *)p)
 368         struct crypto_session_params csp;
 369         struct fcrypt *fcr = fp->f_data;
 370         struct csession *cse;
 371         struct session_op *sop;
 372         struct crypt_op *cop;
 373         struct crypt_aead *caead;
 374         struct enc_xform *txform = NULL;
 375         struct auth_hash *thash = NULL;
 376         void *key = NULL;
 377         void *mackey = NULL;
 378         struct crypt_kop *kop;
 379         crypto_session_t cses;
 380         u_int32_t ses;
 381         int error = 0, crid;
 382 #ifdef COMPAT_FREEBSD32
 383         struct session2_op sopc;
 384         struct crypt_op copc;
 385         struct crypt_kop kopc;
 386 #endif
 387
 388         switch (cmd) {
 389         case CIOCGSESSION:
 390         case CIOCGSESSION2:
 391 #ifdef COMPAT_FREEBSD32
 392         case CIOCGSESSION32:
 393         case CIOCGSESSION232:
 394                 if (cmd == CIOCGSESSION32) {
 395                         session_op_from_32(data, (struct session_op *)&sopc);
 396                         sop = (struct session_op *)&sopc;
 397                 } else if (cmd == CIOCGSESSION232) {
 398                         session2_op_from_32(data, &sopc);
 399                         sop = (struct session_op *)&sopc;
 400                 } else
 401 #endif
 402                         sop = (struct session_op *)data;
 403                 switch (sop->cipher) {
 404                 case 0:
 405                         break;
 406                 case CRYPTO_AES_CBC:
 407                         txform = &enc_xform_rijndael128;
 408                         break;
 409                 case CRYPTO_AES_XTS:
 410                         txform = &enc_xform_aes_xts;
 411                         break;
 412                 case CRYPTO_NULL_CBC:
 413                         txform = &enc_xform_null;
 414                         break;
 415                 case CRYPTO_CAMELLIA_CBC:
 416                         txform = &enc_xform_camellia;
 417                         break;
 418                 case CRYPTO_AES_ICM:
 419                         txform = &enc_xform_aes_icm;
 420                         break;
 421                 case CRYPTO_AES_NIST_GCM_16:
 422                         txform = &enc_xform_aes_nist_gcm;
 423                         break;
 424                 case CRYPTO_CHACHA20:
 425                         txform = &enc_xform_chacha20;
 426                         break;
 427                 case CRYPTO_AES_CCM_16:
 428                         txform = &enc_xform_ccm;
 429                         break;
 430
 431                 default:
 432                         CRYPTDEB("invalid cipher");
 433                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 434                         return (EINVAL);
 435                 }
 436
 437                 switch (sop->mac) {
 438                 case 0:
 439                         break;
 440                 case CRYPTO_POLY1305:
 441                         thash = &auth_hash_poly1305;
 442                         break;
 443                 case CRYPTO_SHA1_HMAC:
 444                         thash = &auth_hash_hmac_sha1;
 445                         break;
 446                 case CRYPTO_SHA2_224_HMAC:
 447                         thash = &auth_hash_hmac_sha2_224;
 448                         break;
 449                 case CRYPTO_SHA2_256_HMAC:
 450                         thash = &auth_hash_hmac_sha2_256;
 451                         break;
 452                 case CRYPTO_SHA2_384_HMAC:
 453                         thash = &auth_hash_hmac_sha2_384;
 454                         break;
 455                 case CRYPTO_SHA2_512_HMAC:
 456                         thash = &auth_hash_hmac_sha2_512;
 457                         break;
 458                 case CRYPTO_RIPEMD160_HMAC:
 459                         thash = &auth_hash_hmac_ripemd_160;
 460                         break;
 461 #ifdef COMPAT_FREEBSD12
 462                 case CRYPTO_AES_128_NIST_GMAC:
 463                 case CRYPTO_AES_192_NIST_GMAC:
 464                 case CRYPTO_AES_256_NIST_GMAC:
 465                         /* Should always be paired with GCM. */
 466                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 467                                 CRYPTDEB("GMAC without GCM");
 468                                 return (EINVAL);
 469                         }
 470                         break;
 471 #endif
 472                 case CRYPTO_AES_NIST_GMAC:
 473                         switch (sop->mackeylen * 8) {
 474                         case 128:
 475                                 thash = &auth_hash_nist_gmac_aes_128;
 476                                 break;
 477                         case 192:
 478                                 thash = &auth_hash_nist_gmac_aes_192;
 479                                 break;
 480                         case 256:
 481                                 thash = &auth_hash_nist_gmac_aes_256;
 482                                 break;
 483                         default:
 484                                 CRYPTDEB("invalid GMAC key length");
 485                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 486                                     __LINE__);
 487                                 return (EINVAL);
 488                         }
 489                         break;
 490                 case CRYPTO_AES_CCM_CBC_MAC:
 491                         switch (sop->mackeylen) {
 492                         case 16:
 493                                 thash = &auth_hash_ccm_cbc_mac_128;
 494                                 break;
 495                         case 24:
 496                                 thash = &auth_hash_ccm_cbc_mac_192;
 497                                 break;
 498                         case 32:
 499                                 thash = &auth_hash_ccm_cbc_mac_256;
 500                                 break;
 501                         default:
 502                                 CRYPTDEB("Invalid CBC MAC key size %d",
 503                                     sop->keylen);
 504                                 SDT_PROBE1(opencrypto, dev, ioctl,
 505                                     error, __LINE__);
 506                                 return (EINVAL);
 507                         }
 508                         break;
 509                 case CRYPTO_SHA1:
 510                         thash = &auth_hash_sha1;
 511                         break;
 512                 case CRYPTO_SHA2_224:
 513                         thash = &auth_hash_sha2_224;
 514                         break;
 515                 case CRYPTO_SHA2_256:
 516                         thash = &auth_hash_sha2_256;
 517                         break;
 518                 case CRYPTO_SHA2_384:
 519                         thash = &auth_hash_sha2_384;
 520                         break;
 521                 case CRYPTO_SHA2_512:
 522                         thash = &auth_hash_sha2_512;
 523                         break;
 524
 525                 case CRYPTO_NULL_HMAC:
 526                         thash = &auth_hash_null;
 527                         break;
 528
 529                 case CRYPTO_BLAKE2B:
 530                         thash = &auth_hash_blake2b;
 531                         break;
 532                 case CRYPTO_BLAKE2S:
 533                         thash = &auth_hash_blake2s;
 534                         break;
 535
 536                 default:
 537                         CRYPTDEB("invalid mac");
 538                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 539                         return (EINVAL);
 540                 }
 541
 542                 if (txform == NULL && thash == NULL)
 543                         return (EINVAL);
 544
 545                 memset(&csp, 0, sizeof(csp));
 546
 547                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 548                         switch (sop->mac) {
 549 #ifdef COMPAT_FREEBSD12
 550                         case CRYPTO_AES_128_NIST_GMAC:
 551                         case CRYPTO_AES_192_NIST_GMAC:
 552                         case CRYPTO_AES_256_NIST_GMAC:
 553                                 if (sop->keylen != sop->mackeylen)
 554                                         return (EINVAL);
 555                                 break;
 556 #endif
 557                         case 0:
 558                                 break;
 559                         default:
 560                                 return (EINVAL);
 561                         }
 562                         csp.csp_mode = CSP_MODE_AEAD;
 563                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 564                         switch (sop->mac) {
 565 #ifdef COMPAT_FREEBSD12
 566                         case CRYPTO_AES_CCM_CBC_MAC:
 567                                 if (sop->keylen != sop->mackeylen)
 568                                         return (EINVAL);
 569                                 thash = NULL;
 570                                 break;
 571 #endif
 572                         case 0:
 573                                 break;
 574                         default:
 575                                 return (EINVAL);
 576                         }
 577                         csp.csp_mode = CSP_MODE_AEAD;
 578                 } else if (txform && thash)
 579                         csp.csp_mode = CSP_MODE_ETA;
 580                 else if (txform)
 581                         csp.csp_mode = CSP_MODE_CIPHER;
 582                 else
 583                         csp.csp_mode = CSP_MODE_DIGEST;
 584
 585                 if (txform) {
 586                         csp.csp_cipher_alg = txform->type;
 587                         csp.csp_cipher_klen = sop->keylen;
 588                         if (sop->keylen > txform->maxkey ||
 589                             sop->keylen < txform->minkey) {
 590                                 CRYPTDEB("invalid cipher parameters");
 591                                 error = EINVAL;
 592                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 593                                     __LINE__);
 594                                 goto bail;
 595                         }
 596
 597                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 598                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 599                         if (error) {
 600                                 CRYPTDEB("invalid key");
 601                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 602                                     __LINE__);
 603                                 goto bail;
 604                         }
 605                         csp.csp_cipher_key = key;
 606                         csp.csp_ivlen = txform->ivsize;
 607                 }
 608
 609                 if (thash) {
 610                         csp.csp_auth_alg = thash->type;
 611                         csp.csp_auth_klen = sop->mackeylen;
 612                         if (sop->mackeylen > thash->keysize ||
 613                             sop->mackeylen < 0) {
 614                                 CRYPTDEB("invalid mac key length");
 615                                 error = EINVAL;
 616                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 617                                     __LINE__);
 618                                 goto bail;
 619                         }
 620
 621                         if (csp.csp_auth_klen) {
 622                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 623                                     M_WAITOK);
 624                                 error = copyin(sop->mackey, mackey,
 625                                     csp.csp_auth_klen);
 626                                 if (error) {
 627                                         CRYPTDEB("invalid mac key");
 628                                         SDT_PROBE1(opencrypto, dev, ioctl,
 629                                             error, __LINE__);
 630                                         goto bail;
 631                                 }
 632                                 csp.csp_auth_key = mackey;
 633                         }
 634
 635                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 636                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 637                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 638                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 639                 }
 640
 641                 /* NB: CIOCGSESSION2 has the crid */
 642                 if (cmd == CIOCGSESSION2
 643 #ifdef COMPAT_FREEBSD32
 644                     || cmd == CIOCGSESSION232
 645 #endif
 646                         ) {
 647                         crid = SES2(sop)->crid;
 648                         error = checkforsoftware(&crid);
 649                         if (error) {
 650                                 CRYPTDEB("checkforsoftware");
 651                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 652                                     __LINE__);
 653                                 goto bail;
 654                         }
 655                 } else
 656                         crid = CRYPTOCAP_F_HARDWARE;
 657                 error = crypto_newsession(&cses, &csp, crid);
 658                 if (error) {
 659                         CRYPTDEB("crypto_newsession");
 660                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 661                         goto bail;
 662                 }
 663
 664                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 665
 666                 if (cse == NULL) {
 667                         crypto_freesession(cses);
 668                         error = EINVAL;
 669                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 670                         CRYPTDEB("csecreate");
 671                         goto bail;
 672                 }
 673                 sop->ses = cse->ses;
 674                 if (cmd == CIOCGSESSION2
 675 #ifdef COMPAT_FREEBSD32
 676                     || cmd == CIOCGSESSION232
 677 #endif
 678                     ) {
 679                         /* return hardware/driver id */
 680                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 681                 }
 682 bail:
 683                 if (error) {
 684                         free(key, M_XDATA);
 685                         free(mackey, M_XDATA);
 686                 }
 687 #ifdef COMPAT_FREEBSD32
 688                 else {
 689                         if (cmd == CIOCGSESSION32)
 690                                 session_op_to_32(sop, data);
 691                         else if (cmd == CIOCGSESSION232)
 692                                 session2_op_to_32((struct session2_op *)sop,
 693                                     data);
 694                 }
 695 #endif
 696                 break;
 697         case CIOCFSESSION:
 698                 ses = *(u_int32_t *)data;
 699                 if (!csedelete(fcr, ses)) {
 700                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 701                         return (EINVAL);
 702                 }
 703                 break;
 704         case CIOCCRYPT:
 705 #ifdef COMPAT_FREEBSD32
 706         case CIOCCRYPT32:
 707                 if (cmd == CIOCCRYPT32) {
 708                         cop = &copc;
 709                         crypt_op_from_32(data, cop);
 710                 } else
 711 #endif
 712                         cop = (struct crypt_op *)data;
 713                 cse = csefind(fcr, cop->ses);
 714                 if (cse == NULL) {
 715                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 716                         return (EINVAL);
 717                 }
 718                 error = cryptodev_op(cse, cop, active_cred, td);
 719                 csefree(cse);
 720 #ifdef COMPAT_FREEBSD32
 721                 if (error == 0 && cmd == CIOCCRYPT32)
 722                         crypt_op_to_32(cop, data);
 723 #endif
 724                 break;
 725         case CIOCKEY:
 726         case CIOCKEY2:
 727 #ifdef COMPAT_FREEBSD32
 728         case CIOCKEY32:
 729         case CIOCKEY232:
 730 #endif
 731                 if (!crypto_userasymcrypto) {
 732                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 733                         return (EPERM);         /* XXX compat? */
 734                 }
 735 #ifdef COMPAT_FREEBSD32
 736                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 737                         kop = &kopc;
 738                         crypt_kop_from_32(data, kop);
 739                 } else
 740 #endif
 741                         kop = (struct crypt_kop *)data;
 742                 if (cmd == CIOCKEY
 743 #ifdef COMPAT_FREEBSD32
 744                     || cmd == CIOCKEY32
 745 #endif
 746                     ) {
 747                         /* NB: crypto core enforces s/w driver use */
 748                         kop->crk_crid =
 749                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 750                 }
 751                 mtx_lock(&Giant);
 752                 error = cryptodev_key(kop);
 753                 mtx_unlock(&Giant);
 754 #ifdef COMPAT_FREEBSD32
 755                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 756                         crypt_kop_to_32(kop, data);
 757 #endif
 758                 break;
 759         case CIOCASYMFEAT:
 760                 if (!crypto_userasymcrypto) {
 761                         /*
 762                          * NB: if user asym crypto operations are
 763                          * not permitted return "no algorithms"
 764                          * so well-behaved applications will just
 765                          * fallback to doing them in software.
 766                          */
 767                         *(int *)data = 0;
 768                 } else {
 769                         error = crypto_getfeat((int *)data);
 770                         if (error)
 771                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 772                                     __LINE__);
 773                 }
 774                 break;
 775         case CIOCFINDDEV:
 776                 error = cryptodev_find((struct crypt_find_op *)data);
 777                 break;
 778         case CIOCCRYPTAEAD:
 779                 caead = (struct crypt_aead *)data;
 780                 cse = csefind(fcr, caead->ses);
 781                 if (cse == NULL) {
 782                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 783                         return (EINVAL);
 784                 }
 785                 error = cryptodev_aead(cse, caead, active_cred, td);
 786                 csefree(cse);
 787                 break;
 788         default:
 789                 error = EINVAL;
 790                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 791                 break;
 792         }
 793         return (error);
 794 #undef SES2
 795 }
 796
 797 static int cryptodev_cb(struct cryptop *);
 798
 799 static struct cryptop_data *
 800 cod_alloc(struct csession *cse, size_t len, struct thread *td)
 801 {
 802         struct cryptop_data *cod;
 803
 804         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 805
 806         cod->cse = cse;
 807         cod->buf = malloc(len, M_XDATA, M_WAITOK);
 808         return (cod);
 809 }
 810
 811 static void
 812 cod_free(struct cryptop_data *cod)
 813 {
 814
 815         free(cod->buf, M_XDATA);
 816         free(cod, M_XDATA);
 817 }
 818
 819 static int
 820 cryptodev_op(
 821         struct csession *cse,
 822         struct crypt_op *cop,
 823         struct ucred *active_cred,
 824         struct thread *td)
 825 {
 826         struct cryptop_data *cod = NULL;
 827         struct cryptop *crp = NULL;
 828         int error;
 829
 830         if (cop->len > 256*1024-4) {
 831                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 832                 return (E2BIG);
 833         }
 834
 835         if (cse->txform) {
 836                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 837                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 838                         return (EINVAL);
 839                 }
 840         }
 841
 842         if (cop->mac && cse->hashsize == 0) {
 843                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 844                 return (EINVAL);
 845         }
 846
 847         /*
 848          * The COP_F_CIPHER_FIRST flag predates explicit session
 849          * modes, but the only way it was used was for EtA so allow it
 850          * as long as it is consistent with EtA.
 851          */
 852         if (cop->flags & COP_F_CIPHER_FIRST) {
 853                 if (cop->op != COP_ENCRYPT) {
 854                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 855                         return (EINVAL);
 856                 }
 857         }
 858
 859         cod = cod_alloc(cse, cop->len + cse->hashsize, td);
 860
 861         crp = crypto_getreq(cse->cses, M_WAITOK);
 862
 863         error = copyin(cop->src, cod->buf, cop->len);
 864         if (error) {
 865                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 866                 goto bail;
 867         }
 868         crp->crp_payload_start = 0;
 869         crp->crp_payload_length = cop->len;
 870         if (cse->hashsize)
 871                 crp->crp_digest_start = cop->len;
 872
 873         switch (cse->mode) {
 874         case CSP_MODE_COMPRESS:
 875                 switch (cop->op) {
 876                 case COP_ENCRYPT:
 877                         crp->crp_op = CRYPTO_OP_COMPRESS;
 878                         break;
 879                 case COP_DECRYPT:
 880                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 881                         break;
 882                 default:
 883                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 884                         error = EINVAL;
 885                         goto bail;
 886                 }
 887                 break;
 888         case CSP_MODE_CIPHER:
 889                 switch (cop->op) {
 890                 case COP_ENCRYPT:
 891                         crp->crp_op = CRYPTO_OP_ENCRYPT;
 892                         break;
 893                 case COP_DECRYPT:
 894                         crp->crp_op = CRYPTO_OP_DECRYPT;
 895                         break;
 896                 default:
 897                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 898                         error = EINVAL;
 899                         goto bail;
 900                 }
 901                 break;
 902         case CSP_MODE_DIGEST:
 903                 switch (cop->op) {
 904                 case 0:
 905                 case COP_ENCRYPT:
 906                 case COP_DECRYPT:
 907                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
 908                         break;
 909                 default:
 910                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 911                         error = EINVAL;
 912                         goto bail;
 913                 }
 914                 break;
 915         case CSP_MODE_ETA:
 916                 switch (cop->op) {
 917                 case COP_ENCRYPT:
 918                         crp->crp_op = CRYPTO_OP_ENCRYPT |
 919                             CRYPTO_OP_COMPUTE_DIGEST;
 920                         break;
 921                 case COP_DECRYPT:
 922                         crp->crp_op = CRYPTO_OP_DECRYPT |
 923                             CRYPTO_OP_VERIFY_DIGEST;
 924                         break;
 925                 default:
 926                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 927                         error = EINVAL;
 928                         goto bail;
 929                 }
 930                 break;
 931         default:
 932                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 933                 error = EINVAL;
 934                 goto bail;
 935         }
 936
 937         crp->crp_ilen = cop->len + cse->hashsize;
 938         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
 939         crp->crp_buf = cod->buf;
 940         crp->crp_buf_type = CRYPTO_BUF_CONTIG;
 941         crp->crp_callback = cryptodev_cb;
 942         crp->crp_opaque = cod;
 943
 944         if (cop->iv) {
 945                 if (cse->ivsize == 0) {
 946                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 947                         error = EINVAL;
 948                         goto bail;
 949                 }
 950                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
 951                 if (error) {
 952                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 953                         goto bail;
 954                 }
 955                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
 956         } else if (cse->ivsize != 0) {
 957                 crp->crp_iv_start = 0;
 958                 crp->crp_payload_start += cse->ivsize;
 959                 crp->crp_payload_length -= cse->ivsize;
 960         }
 961
 962         if (cop->mac != NULL) {
 963                 error = copyin(cop->mac, cod->buf + cop->len, cse->hashsize);
 964                 if (error) {
 965                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 966                         goto bail;
 967                 }
 968         }
 969 again:
 970         /*
 971          * Let the dispatch run unlocked, then, interlock against the
 972          * callback before checking if the operation completed and going
 973          * to sleep.  This insures drivers don't inherit our lock which
 974          * results in a lock order reversal between crypto_dispatch forced
 975          * entry and the crypto_done callback into us.
 976          */
 977         error = crypto_dispatch(crp);
 978         if (error != 0) {
 979                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 980                 goto bail;
 981         }
 982
 983         mtx_lock(&cse->lock);
 984         while (!cod->done)
 985                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
 986         mtx_unlock(&cse->lock);
 987
 988         if (crp->crp_etype == EAGAIN) {
 989                 crp->crp_etype = 0;
 990                 crp->crp_flags &= ~CRYPTO_F_DONE;
 991                 cod->done = false;
 992                 goto again;
 993         }
 994
 995         if (crp->crp_etype != 0) {
 996                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 997                 error = crp->crp_etype;
 998                 goto bail;
 999         }
1000
1001         if (cop->dst != NULL) {
1002                 error = copyout(cod->buf, cop->dst, cop->len);
1003                 if (error) {
1004                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1005                         goto bail;
1006                 }
1007         }
1008
1009         if (cop->mac != NULL) {
1010                 error = copyout(cod->buf + cop->len, cop->mac, cse->hashsize);
1011                 if (error) {
1012                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1013                         goto bail;
1014                 }
1015         }
1016
1017 bail:
1018         crypto_freereq(crp);
1019         cod_free(cod);
1020
1021         return (error);
1022 }
1023
1024 static int
1025 cryptodev_aead(
1026         struct csession *cse,
1027         struct crypt_aead *caead,
1028         struct ucred *active_cred,
1029         struct thread *td)
1030 {
1031         struct cryptop_data *cod = NULL;
1032         struct cryptop *crp = NULL;
1033         int error;
1034
1035         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1036                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1037                 return (E2BIG);
1038         }
1039
1040         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1041             (caead->len % cse->txform->blocksize) != 0) {
1042                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1043                 return (EINVAL);
1044         }
1045
1046         /*
1047          * The COP_F_CIPHER_FIRST flag predates explicit session
1048          * modes, but the only way it was used was for EtA so allow it
1049          * as long as it is consistent with EtA.
1050          */
1051         if (caead->flags & COP_F_CIPHER_FIRST) {
1052                 if (caead->op != COP_ENCRYPT) {
1053                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1054                         return (EINVAL);
1055                 }
1056         }
1057
1058         cod = cod_alloc(cse, caead->aadlen + caead->len + cse->hashsize, td);
1059
1060         crp = crypto_getreq(cse->cses, M_WAITOK);
1061
1062         error = copyin(caead->aad, cod->buf, caead->aadlen);
1063         if (error) {
1064                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1065                 goto bail;
1066         }
1067         crp->crp_aad_start = 0;
1068         crp->crp_aad_length = caead->aadlen;
1069
1070         error = copyin(caead->src, cod->buf + caead->aadlen, caead->len);
1071         if (error) {
1072                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1073                 goto bail;
1074         }
1075         crp->crp_payload_start = caead->aadlen;
1076         crp->crp_payload_length = caead->len;
1077         crp->crp_digest_start = caead->aadlen + caead->len;
1078
1079         switch (cse->mode) {
1080         case CSP_MODE_AEAD:
1081                 switch (caead->op) {
1082                 case COP_ENCRYPT:
1083                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1084                             CRYPTO_OP_COMPUTE_DIGEST;
1085                         break;
1086                 case COP_DECRYPT:
1087                         crp->crp_op = CRYPTO_OP_DECRYPT |
1088                             CRYPTO_OP_VERIFY_DIGEST;
1089                         break;
1090                 default:
1091                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1092                         error = EINVAL;
1093                         goto bail;
1094                 }
1095                 break;
1096         case CSP_MODE_ETA:
1097                 switch (caead->op) {
1098                 case COP_ENCRYPT:
1099                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1100                             CRYPTO_OP_COMPUTE_DIGEST;
1101                         break;
1102                 case COP_DECRYPT:
1103                         crp->crp_op = CRYPTO_OP_DECRYPT |
1104                             CRYPTO_OP_VERIFY_DIGEST;
1105                         break;
1106                 default:
1107                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1108                         error = EINVAL;
1109                         goto bail;
1110                 }
1111                 break;
1112         default:
1113                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1114                 error = EINVAL;
1115                 goto bail;
1116         }
1117
1118         crp->crp_ilen = caead->aadlen + caead->len + cse->hashsize;
1119         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1120         crp->crp_buf = cod->buf;
1121         crp->crp_buf_type = CRYPTO_BUF_CONTIG;
1122         crp->crp_callback = cryptodev_cb;
1123         crp->crp_opaque = cod;
1124
1125         if (caead->iv) {
1126                 /*
1127                  * Permit a 16-byte IV for AES-XTS, but only use the
1128                  * first 8 bytes as a block number.
1129                  */
1130                 if (cse->mode == CSP_MODE_ETA &&
1131                     caead->ivlen == AES_BLOCK_LEN &&
1132                     cse->ivsize == AES_XTS_IV_LEN)
1133                         caead->ivlen = AES_XTS_IV_LEN;
1134
1135                 if (caead->ivlen != cse->ivsize) {
1136                         error = EINVAL;
1137                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1138                         goto bail;
1139                 }
1140
1141                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1142                 if (error) {
1143                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1144                         goto bail;
1145                 }
1146                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1147         } else {
1148                 crp->crp_iv_start = crp->crp_payload_start;
1149                 crp->crp_payload_start += cse->ivsize;
1150                 crp->crp_payload_length -= cse->ivsize;
1151         }
1152
1153         error = copyin(caead->tag, cod->buf + caead->len + caead->aadlen,
1154             cse->hashsize);
1155         if (error) {
1156                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1157                 goto bail;
1158         }
1159 again:
1160         /*
1161          * Let the dispatch run unlocked, then, interlock against the
1162          * callback before checking if the operation completed and going
1163          * to sleep.  This insures drivers don't inherit our lock which
1164          * results in a lock order reversal between crypto_dispatch forced
1165          * entry and the crypto_done callback into us.
1166          */
1167         error = crypto_dispatch(crp);
1168         if (error != 0) {
1169                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1170                 goto bail;
1171         }
1172
1173         mtx_lock(&cse->lock);
1174         while (!cod->done)
1175                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1176         mtx_unlock(&cse->lock);
1177
1178         if (crp->crp_etype == EAGAIN) {
1179                 crp->crp_etype = 0;
1180                 crp->crp_flags &= ~CRYPTO_F_DONE;
1181                 cod->done = false;
1182                 goto again;
1183         }
1184
1185         if (crp->crp_etype != 0) {
1186                 error = crp->crp_etype;
1187                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1188                 goto bail;
1189         }
1190
1191         if (caead->dst != NULL) {
1192                 error = copyout(cod->buf + caead->aadlen, caead->dst,
1193                     caead->len);
1194                 if (error) {
1195                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1196                         goto bail;
1197                 }
1198         }
1199
1200         error = copyout(cod->buf + caead->aadlen + caead->len, caead->tag,
1201             cse->hashsize);
1202         if (error) {
1203                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1204                 goto bail;
1205         }
1206
1207 bail:
1208         crypto_freereq(crp);
1209         cod_free(cod);
1210
1211         return (error);
1212 }
1213
1214 static int
1215 cryptodev_cb(struct cryptop *crp)
1216 {
1217         struct cryptop_data *cod = crp->crp_opaque;
1218
1219         /*
1220          * Lock to ensure the wakeup() is not missed by the loops
1221          * waiting on cod->done in cryptodev_op() and
1222          * cryptodev_aead().
1223          */
1224         mtx_lock(&cod->cse->lock);
1225         cod->done = true;
1226         mtx_unlock(&cod->cse->lock);
1227         wakeup(cod);
1228         return (0);
1229 }
1230
1231 static void
1232 cryptodevkey_cb(struct cryptkop *krp)
1233 {
1234
1235         wakeup_one(krp);
1236 }
1237
1238 static int
1239 cryptodev_key(struct crypt_kop *kop)
1240 {
1241         struct cryptkop *krp = NULL;
1242         int error = EINVAL;
1243         int in, out, size, i;
1244
1245         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1246                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1247                 return (EFBIG);
1248         }
1249
1250         in = kop->crk_iparams;
1251         out = kop->crk_oparams;
1252         switch (kop->crk_op) {
1253         case CRK_MOD_EXP:
1254                 if (in == 3 && out == 1)
1255                         break;
1256                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1257                 return (EINVAL);
1258         case CRK_MOD_EXP_CRT:
1259                 if (in == 6 && out == 1)
1260                         break;
1261                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1262                 return (EINVAL);
1263         case CRK_DSA_SIGN:
1264                 if (in == 5 && out == 2)
1265                         break;
1266                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1267                 return (EINVAL);
1268         case CRK_DSA_VERIFY:
1269                 if (in == 7 && out == 0)
1270                         break;
1271                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1272                 return (EINVAL);
1273         case CRK_DH_COMPUTE_KEY:
1274                 if (in == 3 && out == 1)
1275                         break;
1276                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1277                 return (EINVAL);
1278         default:
1279                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1280                 return (EINVAL);
1281         }
1282
1283         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1284         if (!krp) {
1285                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1286                 return (ENOMEM);
1287         }
1288         krp->krp_op = kop->crk_op;
1289         krp->krp_status = kop->crk_status;
1290         krp->krp_iparams = kop->crk_iparams;
1291         krp->krp_oparams = kop->crk_oparams;
1292         krp->krp_crid = kop->crk_crid;
1293         krp->krp_status = 0;
1294         krp->krp_callback = cryptodevkey_cb;
1295
1296         for (i = 0; i < CRK_MAXPARAM; i++) {
1297                 if (kop->crk_param[i].crp_nbits > 65536) {
1298                         /* Limit is the same as in OpenBSD */
1299                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1300                         goto fail;
1301                 }
1302                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1303         }
1304         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1305                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1306                 if (size == 0)
1307                         continue;
1308                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1309                 if (i >= krp->krp_iparams)
1310                         continue;
1311                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1312                 if (error) {
1313                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1314                         goto fail;
1315                 }
1316         }
1317
1318         error = crypto_kdispatch(krp);
1319         if (error) {
1320                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1321                 goto fail;
1322         }
1323         error = tsleep(krp, PSOCK, "crydev", 0);
1324         if (error) {
1325                 /* XXX can this happen?  if so, how do we recover? */
1326                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1327                 goto fail;
1328         }
1329
1330         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1331         if (krp->krp_status != 0) {
1332                 error = krp->krp_status;
1333                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1334                 goto fail;
1335         }
1336
1337         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1338                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1339                 if (size == 0)
1340                         continue;
1341                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1342                 if (error) {
1343                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1344                         goto fail;
1345                 }
1346         }
1347
1348 fail:
1349         if (krp) {
1350                 kop->crk_status = krp->krp_status;
1351                 for (i = 0; i < CRK_MAXPARAM; i++) {
1352                         if (krp->krp_param[i].crp_p)
1353                                 free(krp->krp_param[i].crp_p, M_XDATA);
1354                 }
1355                 free(krp, M_XDATA);
1356         }
1357         return (error);
1358 }
1359
1360 static int
1361 cryptodev_find(struct crypt_find_op *find)
1362 {
1363         device_t dev;
1364         size_t fnlen = sizeof find->name;
1365
1366         if (find->crid != -1) {
1367                 dev = crypto_find_device_byhid(find->crid);
1368                 if (dev == NULL)
1369                         return (ENOENT);
1370                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1371                 find->name[fnlen - 1] = '\x0';
1372         } else {
1373                 find->name[fnlen - 1] = '\x0';
1374                 find->crid = crypto_find_driver(find->name);
1375                 if (find->crid == -1)
1376                         return (ENOENT);
1377         }
1378         return (0);
1379 }
1380
1381 /* ARGSUSED */
1382 static int
1383 cryptof_stat(
1384         struct file *fp,
1385         struct stat *sb,
1386         struct ucred *active_cred,
1387         struct thread *td)
1388 {
1389
1390         return (EOPNOTSUPP);
1391 }
1392
1393 /* ARGSUSED */
1394 static int
1395 cryptof_close(struct file *fp, struct thread *td)
1396 {
1397         struct fcrypt *fcr = fp->f_data;
1398         struct csession *cse;
1399
1400         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1401                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1402                 KASSERT(cse->refs == 1,
1403                     ("%s: crypto session %p with %d refs", __func__, cse,
1404                     cse->refs));
1405                 csefree(cse);
1406         }
1407         free(fcr, M_XDATA);
1408         fp->f_data = NULL;
1409         return 0;
1410 }
1411
1412 static int
1413 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1414 {
1415
1416         kif->kf_type = KF_TYPE_CRYPTO;
1417         return (0);
1418 }
1419
1420 static struct csession *
1421 csefind(struct fcrypt *fcr, u_int ses)
1422 {
1423         struct csession *cse;
1424
1425         mtx_lock(&fcr->lock);
1426         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1427                 if (cse->ses == ses) {
1428                         refcount_acquire(&cse->refs);
1429                         mtx_unlock(&fcr->lock);
1430                         return (cse);
1431                 }
1432         }
1433         mtx_unlock(&fcr->lock);
1434         return (NULL);
1435 }
1436
1437 static bool
1438 csedelete(struct fcrypt *fcr, u_int ses)
1439 {
1440         struct csession *cse;
1441
1442         mtx_lock(&fcr->lock);
1443         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1444                 if (cse->ses == ses) {
1445                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1446                         mtx_unlock(&fcr->lock);
1447                         csefree(cse);
1448                         return (true);
1449                 }
1450         }
1451         mtx_unlock(&fcr->lock);
1452         return (false);
1453 }
1454
1455 struct csession *
1456 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1457     struct crypto_session_params *csp, struct enc_xform *txform,
1458     void *key, struct auth_hash *thash, void *mackey)
1459 {
1460         struct csession *cse;
1461
1462         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1463         if (cse == NULL)
1464                 return NULL;
1465         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1466         refcount_init(&cse->refs, 1);
1467         cse->key = key;
1468         cse->mackey = mackey;
1469         cse->mode = csp->csp_mode;
1470         cse->cses = cses;
1471         cse->txform = txform;
1472         if (thash != NULL)
1473                 cse->hashsize = thash->hashsize;
1474         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1475                 cse->hashsize = AES_GMAC_HASH_LEN;
1476         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1477                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1478         cse->ivsize = csp->csp_ivlen;
1479         mtx_lock(&fcr->lock);
1480         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1481         cse->ses = fcr->sesn++;
1482         mtx_unlock(&fcr->lock);
1483         return (cse);
1484 }
1485
1486 static void
1487 csefree(struct csession *cse)
1488 {
1489
1490         if (!refcount_release(&cse->refs))
1491                 return;
1492         crypto_freesession(cse->cses);
1493         mtx_destroy(&cse->lock);
1494         if (cse->key)
1495                 free(cse->key, M_XDATA);
1496         if (cse->mackey)
1497                 free(cse->mackey, M_XDATA);
1498         free(cse, M_XDATA);
1499 }
1500
1501 static int
1502 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1503 {
1504         struct file *f;
1505         struct fcrypt *fcr;
1506         int fd, error;
1507
1508         switch (cmd) {
1509         case CRIOGET:
1510                 error = falloc_noinstall(td, &f);
1511                 if (error)
1512                         break;
1513
1514                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1515                 TAILQ_INIT(&fcr->csessions);
1516                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1517
1518                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1519                 error = finstall(td, f, &fd, 0, NULL);
1520                 if (error) {
1521                         mtx_destroy(&fcr->lock);
1522                         free(fcr, M_XDATA);
1523                 } else
1524                         *(uint32_t *)data = fd;
1525                 fdrop(f, td);
1526                 break;
1527         case CRIOFINDDEV:
1528                 error = cryptodev_find((struct crypt_find_op *)data);
1529                 break;
1530         case CRIOASYMFEAT:
1531                 error = crypto_getfeat((int *)data);
1532                 break;
1533         default:
1534                 error = EINVAL;
1535                 break;
1536         }
1537         return (error);
1538 }
1539
1540 static struct cdevsw crypto_cdevsw = {
1541         .d_version =    D_VERSION,
1542         .d_ioctl =      cryptoioctl,
1543         .d_name =       "crypto",
1544 };
1545 static struct cdev *crypto_dev;
1546
1547 /*
1548  * Initialization code, both for static and dynamic loading.
1549  */
1550 static int
1551 cryptodev_modevent(module_t mod, int type, void *unused)
1552 {
1553         switch (type) {
1554         case MOD_LOAD:
1555                 if (bootverbose)
1556                         printf("crypto: <crypto device>\n");
1557                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1558                                       UID_ROOT, GID_WHEEL, 0666,
1559                                       "crypto");
1560                 return 0;
1561         case MOD_UNLOAD:
1562                 /*XXX disallow if active sessions */
1563                 destroy_dev(crypto_dev);
1564                 return 0;
1565         }
1566         return EINVAL;
1567 }
1568
1569 static moduledata_t cryptodev_mod = {
1570         "cryptodev",
1571         cryptodev_modevent,
1572         0
1573 };
1574 MODULE_VERSION(cryptodev, 1);
1575 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1576 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1577 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);