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         char            *obuf;
 286         bool            done;
 287 };
 288
 289 struct fcrypt {
 290         TAILQ_HEAD(csessionlist, csession) csessions;
 291         int             sesn;
 292         struct mtx      lock;
 293 };
 294
 295 static bool use_outputbuffers;
 296 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
 297     &use_outputbuffers, 0,
 298     "Use separate output buffers for /dev/crypto requests.");
 299
 300 static  int cryptof_ioctl(struct file *, u_long, void *,
 301                     struct ucred *, struct thread *);
 302 static  int cryptof_stat(struct file *, struct stat *,
 303                     struct ucred *, struct thread *);
 304 static  int cryptof_close(struct file *, struct thread *);
 305 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 306                     struct filedesc *);
 307
 308 static struct fileops cryptofops = {
 309     .fo_read = invfo_rdwr,
 310     .fo_write = invfo_rdwr,
 311     .fo_truncate = invfo_truncate,
 312     .fo_ioctl = cryptof_ioctl,
 313     .fo_poll = invfo_poll,
 314     .fo_kqfilter = invfo_kqfilter,
 315     .fo_stat = cryptof_stat,
 316     .fo_close = cryptof_close,
 317     .fo_chmod = invfo_chmod,
 318     .fo_chown = invfo_chown,
 319     .fo_sendfile = invfo_sendfile,
 320     .fo_fill_kinfo = cryptof_fill_kinfo,
 321 };
 322
 323 static struct csession *csefind(struct fcrypt *, u_int);
 324 static bool csedelete(struct fcrypt *, u_int);
 325 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 326     struct crypto_session_params *, struct enc_xform *, void *,
 327     struct auth_hash *, void *);
 328 static void csefree(struct csession *);
 329
 330 static  int cryptodev_op(struct csession *, struct crypt_op *,
 331                         struct ucred *, struct thread *td);
 332 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 333                         struct ucred *, struct thread *);
 334 static  int cryptodev_key(struct crypt_kop *);
 335 static  int cryptodev_find(struct crypt_find_op *);
 336
 337 /*
 338  * Check a crypto identifier to see if it requested
 339  * a software device/driver.  This can be done either
 340  * by device name/class or through search constraints.
 341  */
 342 static int
 343 checkforsoftware(int *cridp)
 344 {
 345         int crid;
 346
 347         crid = *cridp;
 348
 349         if (!crypto_devallowsoft) {
 350                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 351                         if (crid & CRYPTOCAP_F_HARDWARE) {
 352                                 *cridp = CRYPTOCAP_F_HARDWARE;
 353                                 return 0;
 354                         }
 355                         return EINVAL;
 356                 }
 357                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 358                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 359                         return EINVAL;
 360         }
 361         return 0;
 362 }
 363
 364 /* ARGSUSED */
 365 static int
 366 cryptof_ioctl(
 367         struct file *fp,
 368         u_long cmd,
 369         void *data,
 370         struct ucred *active_cred,
 371         struct thread *td)
 372 {
 373 #define SES2(p) ((struct session2_op *)p)
 374         struct crypto_session_params csp;
 375         struct fcrypt *fcr = fp->f_data;
 376         struct csession *cse;
 377         struct session_op *sop;
 378         struct crypt_op *cop;
 379         struct crypt_aead *caead;
 380         struct enc_xform *txform = NULL;
 381         struct auth_hash *thash = NULL;
 382         void *key = NULL;
 383         void *mackey = NULL;
 384         struct crypt_kop *kop;
 385         crypto_session_t cses;
 386         u_int32_t ses;
 387         int error = 0, crid;
 388 #ifdef COMPAT_FREEBSD32
 389         struct session2_op sopc;
 390         struct crypt_op copc;
 391         struct crypt_kop kopc;
 392 #endif
 393
 394         switch (cmd) {
 395         case CIOCGSESSION:
 396         case CIOCGSESSION2:
 397 #ifdef COMPAT_FREEBSD32
 398         case CIOCGSESSION32:
 399         case CIOCGSESSION232:
 400                 if (cmd == CIOCGSESSION32) {
 401                         session_op_from_32(data, (struct session_op *)&sopc);
 402                         sop = (struct session_op *)&sopc;
 403                 } else if (cmd == CIOCGSESSION232) {
 404                         session2_op_from_32(data, &sopc);
 405                         sop = (struct session_op *)&sopc;
 406                 } else
 407 #endif
 408                         sop = (struct session_op *)data;
 409                 switch (sop->cipher) {
 410                 case 0:
 411                         break;
 412                 case CRYPTO_AES_CBC:
 413                         txform = &enc_xform_rijndael128;
 414                         break;
 415                 case CRYPTO_AES_XTS:
 416                         txform = &enc_xform_aes_xts;
 417                         break;
 418                 case CRYPTO_NULL_CBC:
 419                         txform = &enc_xform_null;
 420                         break;
 421                 case CRYPTO_CAMELLIA_CBC:
 422                         txform = &enc_xform_camellia;
 423                         break;
 424                 case CRYPTO_AES_ICM:
 425                         txform = &enc_xform_aes_icm;
 426                         break;
 427                 case CRYPTO_AES_NIST_GCM_16:
 428                         txform = &enc_xform_aes_nist_gcm;
 429                         break;
 430                 case CRYPTO_CHACHA20:
 431                         txform = &enc_xform_chacha20;
 432                         break;
 433                 case CRYPTO_AES_CCM_16:
 434                         txform = &enc_xform_ccm;
 435                         break;
 436
 437                 default:
 438                         CRYPTDEB("invalid cipher");
 439                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 440                         return (EINVAL);
 441                 }
 442
 443                 switch (sop->mac) {
 444                 case 0:
 445                         break;
 446                 case CRYPTO_POLY1305:
 447                         thash = &auth_hash_poly1305;
 448                         break;
 449                 case CRYPTO_SHA1_HMAC:
 450                         thash = &auth_hash_hmac_sha1;
 451                         break;
 452                 case CRYPTO_SHA2_224_HMAC:
 453                         thash = &auth_hash_hmac_sha2_224;
 454                         break;
 455                 case CRYPTO_SHA2_256_HMAC:
 456                         thash = &auth_hash_hmac_sha2_256;
 457                         break;
 458                 case CRYPTO_SHA2_384_HMAC:
 459                         thash = &auth_hash_hmac_sha2_384;
 460                         break;
 461                 case CRYPTO_SHA2_512_HMAC:
 462                         thash = &auth_hash_hmac_sha2_512;
 463                         break;
 464                 case CRYPTO_RIPEMD160_HMAC:
 465                         thash = &auth_hash_hmac_ripemd_160;
 466                         break;
 467 #ifdef COMPAT_FREEBSD12
 468                 case CRYPTO_AES_128_NIST_GMAC:
 469                 case CRYPTO_AES_192_NIST_GMAC:
 470                 case CRYPTO_AES_256_NIST_GMAC:
 471                         /* Should always be paired with GCM. */
 472                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 473                                 CRYPTDEB("GMAC without GCM");
 474                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 475                                     __LINE__);
 476                                 return (EINVAL);
 477                         }
 478                         break;
 479 #endif
 480                 case CRYPTO_AES_NIST_GMAC:
 481                         switch (sop->mackeylen * 8) {
 482                         case 128:
 483                                 thash = &auth_hash_nist_gmac_aes_128;
 484                                 break;
 485                         case 192:
 486                                 thash = &auth_hash_nist_gmac_aes_192;
 487                                 break;
 488                         case 256:
 489                                 thash = &auth_hash_nist_gmac_aes_256;
 490                                 break;
 491                         default:
 492                                 CRYPTDEB("invalid GMAC key length");
 493                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 494                                     __LINE__);
 495                                 return (EINVAL);
 496                         }
 497                         break;
 498                 case CRYPTO_AES_CCM_CBC_MAC:
 499                         switch (sop->mackeylen) {
 500                         case 16:
 501                                 thash = &auth_hash_ccm_cbc_mac_128;
 502                                 break;
 503                         case 24:
 504                                 thash = &auth_hash_ccm_cbc_mac_192;
 505                                 break;
 506                         case 32:
 507                                 thash = &auth_hash_ccm_cbc_mac_256;
 508                                 break;
 509                         default:
 510                                 CRYPTDEB("Invalid CBC MAC key size %d",
 511                                     sop->keylen);
 512                                 SDT_PROBE1(opencrypto, dev, ioctl,
 513                                     error, __LINE__);
 514                                 return (EINVAL);
 515                         }
 516                         break;
 517                 case CRYPTO_SHA1:
 518                         thash = &auth_hash_sha1;
 519                         break;
 520                 case CRYPTO_SHA2_224:
 521                         thash = &auth_hash_sha2_224;
 522                         break;
 523                 case CRYPTO_SHA2_256:
 524                         thash = &auth_hash_sha2_256;
 525                         break;
 526                 case CRYPTO_SHA2_384:
 527                         thash = &auth_hash_sha2_384;
 528                         break;
 529                 case CRYPTO_SHA2_512:
 530                         thash = &auth_hash_sha2_512;
 531                         break;
 532
 533                 case CRYPTO_NULL_HMAC:
 534                         thash = &auth_hash_null;
 535                         break;
 536
 537                 case CRYPTO_BLAKE2B:
 538                         thash = &auth_hash_blake2b;
 539                         break;
 540                 case CRYPTO_BLAKE2S:
 541                         thash = &auth_hash_blake2s;
 542                         break;
 543
 544                 default:
 545                         CRYPTDEB("invalid mac");
 546                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 547                         return (EINVAL);
 548                 }
 549
 550                 if (txform == NULL && thash == NULL) {
 551                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 552                         return (EINVAL);
 553                 }
 554
 555                 memset(&csp, 0, sizeof(csp));
 556                 if (use_outputbuffers)
 557                         csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 558
 559                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 560                         switch (sop->mac) {
 561 #ifdef COMPAT_FREEBSD12
 562                         case CRYPTO_AES_128_NIST_GMAC:
 563                         case CRYPTO_AES_192_NIST_GMAC:
 564                         case CRYPTO_AES_256_NIST_GMAC:
 565                                 if (sop->keylen != sop->mackeylen) {
 566                                         SDT_PROBE1(opencrypto, dev, ioctl,
 567                                             error, __LINE__);
 568                                         return (EINVAL);
 569                                 }
 570                                 break;
 571 #endif
 572                         case 0:
 573                                 break;
 574                         default:
 575                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 576                                     __LINE__);
 577                                 return (EINVAL);
 578                         }
 579                         csp.csp_mode = CSP_MODE_AEAD;
 580                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 581                         switch (sop->mac) {
 582 #ifdef COMPAT_FREEBSD12
 583                         case CRYPTO_AES_CCM_CBC_MAC:
 584                                 if (sop->keylen != sop->mackeylen) {
 585                                         SDT_PROBE1(opencrypto, dev, ioctl,
 586                                             error, __LINE__);
 587                                         return (EINVAL);
 588                                 }
 589                                 thash = NULL;
 590                                 break;
 591 #endif
 592                         case 0:
 593                                 break;
 594                         default:
 595                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 596                                     __LINE__);
 597                                 return (EINVAL);
 598                         }
 599                         csp.csp_mode = CSP_MODE_AEAD;
 600                 } else if (txform && thash)
 601                         csp.csp_mode = CSP_MODE_ETA;
 602                 else if (txform)
 603                         csp.csp_mode = CSP_MODE_CIPHER;
 604                 else
 605                         csp.csp_mode = CSP_MODE_DIGEST;
 606
 607                 if (txform) {
 608                         csp.csp_cipher_alg = txform->type;
 609                         csp.csp_cipher_klen = sop->keylen;
 610                         if (sop->keylen > txform->maxkey ||
 611                             sop->keylen < txform->minkey) {
 612                                 CRYPTDEB("invalid cipher parameters");
 613                                 error = EINVAL;
 614                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 615                                     __LINE__);
 616                                 goto bail;
 617                         }
 618
 619                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 620                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 621                         if (error) {
 622                                 CRYPTDEB("invalid key");
 623                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 624                                     __LINE__);
 625                                 goto bail;
 626                         }
 627                         csp.csp_cipher_key = key;
 628                         csp.csp_ivlen = txform->ivsize;
 629                 }
 630
 631                 if (thash) {
 632                         csp.csp_auth_alg = thash->type;
 633                         csp.csp_auth_klen = sop->mackeylen;
 634                         if (sop->mackeylen > thash->keysize ||
 635                             sop->mackeylen < 0) {
 636                                 CRYPTDEB("invalid mac key length");
 637                                 error = EINVAL;
 638                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 639                                     __LINE__);
 640                                 goto bail;
 641                         }
 642
 643                         if (csp.csp_auth_klen) {
 644                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 645                                     M_WAITOK);
 646                                 error = copyin(sop->mackey, mackey,
 647                                     csp.csp_auth_klen);
 648                                 if (error) {
 649                                         CRYPTDEB("invalid mac key");
 650                                         SDT_PROBE1(opencrypto, dev, ioctl,
 651                                             error, __LINE__);
 652                                         goto bail;
 653                                 }
 654                                 csp.csp_auth_key = mackey;
 655                         }
 656
 657                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 658                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 659                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 660                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 661                 }
 662
 663                 /* NB: CIOCGSESSION2 has the crid */
 664                 if (cmd == CIOCGSESSION2
 665 #ifdef COMPAT_FREEBSD32
 666                     || cmd == CIOCGSESSION232
 667 #endif
 668                         ) {
 669                         crid = SES2(sop)->crid;
 670                         error = checkforsoftware(&crid);
 671                         if (error) {
 672                                 CRYPTDEB("checkforsoftware");
 673                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 674                                     __LINE__);
 675                                 goto bail;
 676                         }
 677                 } else
 678                         crid = CRYPTOCAP_F_HARDWARE;
 679                 error = crypto_newsession(&cses, &csp, crid);
 680                 if (error) {
 681                         CRYPTDEB("crypto_newsession");
 682                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 683                         goto bail;
 684                 }
 685
 686                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 687
 688                 if (cse == NULL) {
 689                         crypto_freesession(cses);
 690                         error = EINVAL;
 691                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 692                         CRYPTDEB("csecreate");
 693                         goto bail;
 694                 }
 695                 sop->ses = cse->ses;
 696                 if (cmd == CIOCGSESSION2
 697 #ifdef COMPAT_FREEBSD32
 698                     || cmd == CIOCGSESSION232
 699 #endif
 700                     ) {
 701                         /* return hardware/driver id */
 702                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 703                 }
 704 bail:
 705                 if (error) {
 706                         free(key, M_XDATA);
 707                         free(mackey, M_XDATA);
 708                 }
 709 #ifdef COMPAT_FREEBSD32
 710                 else {
 711                         if (cmd == CIOCGSESSION32)
 712                                 session_op_to_32(sop, data);
 713                         else if (cmd == CIOCGSESSION232)
 714                                 session2_op_to_32((struct session2_op *)sop,
 715                                     data);
 716                 }
 717 #endif
 718                 break;
 719         case CIOCFSESSION:
 720                 ses = *(u_int32_t *)data;
 721                 if (!csedelete(fcr, ses)) {
 722                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 723                         return (EINVAL);
 724                 }
 725                 break;
 726         case CIOCCRYPT:
 727 #ifdef COMPAT_FREEBSD32
 728         case CIOCCRYPT32:
 729                 if (cmd == CIOCCRYPT32) {
 730                         cop = &copc;
 731                         crypt_op_from_32(data, cop);
 732                 } else
 733 #endif
 734                         cop = (struct crypt_op *)data;
 735                 cse = csefind(fcr, cop->ses);
 736                 if (cse == NULL) {
 737                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 738                         return (EINVAL);
 739                 }
 740                 error = cryptodev_op(cse, cop, active_cred, td);
 741                 csefree(cse);
 742 #ifdef COMPAT_FREEBSD32
 743                 if (error == 0 && cmd == CIOCCRYPT32)
 744                         crypt_op_to_32(cop, data);
 745 #endif
 746                 break;
 747         case CIOCKEY:
 748         case CIOCKEY2:
 749 #ifdef COMPAT_FREEBSD32
 750         case CIOCKEY32:
 751         case CIOCKEY232:
 752 #endif
 753                 if (!crypto_userasymcrypto) {
 754                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 755                         return (EPERM);         /* XXX compat? */
 756                 }
 757 #ifdef COMPAT_FREEBSD32
 758                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 759                         kop = &kopc;
 760                         crypt_kop_from_32(data, kop);
 761                 } else
 762 #endif
 763                         kop = (struct crypt_kop *)data;
 764                 if (cmd == CIOCKEY
 765 #ifdef COMPAT_FREEBSD32
 766                     || cmd == CIOCKEY32
 767 #endif
 768                     ) {
 769                         /* NB: crypto core enforces s/w driver use */
 770                         kop->crk_crid =
 771                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 772                 }
 773                 mtx_lock(&Giant);
 774                 error = cryptodev_key(kop);
 775                 mtx_unlock(&Giant);
 776 #ifdef COMPAT_FREEBSD32
 777                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 778                         crypt_kop_to_32(kop, data);
 779 #endif
 780                 break;
 781         case CIOCASYMFEAT:
 782                 if (!crypto_userasymcrypto) {
 783                         /*
 784                          * NB: if user asym crypto operations are
 785                          * not permitted return "no algorithms"
 786                          * so well-behaved applications will just
 787                          * fallback to doing them in software.
 788                          */
 789                         *(int *)data = 0;
 790                 } else {
 791                         error = crypto_getfeat((int *)data);
 792                         if (error)
 793                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 794                                     __LINE__);
 795                 }
 796                 break;
 797         case CIOCFINDDEV:
 798                 error = cryptodev_find((struct crypt_find_op *)data);
 799                 break;
 800         case CIOCCRYPTAEAD:
 801                 caead = (struct crypt_aead *)data;
 802                 cse = csefind(fcr, caead->ses);
 803                 if (cse == NULL) {
 804                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 805                         return (EINVAL);
 806                 }
 807                 error = cryptodev_aead(cse, caead, active_cred, td);
 808                 csefree(cse);
 809                 break;
 810         default:
 811                 error = EINVAL;
 812                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 813                 break;
 814         }
 815         return (error);
 816 #undef SES2
 817 }
 818
 819 static int cryptodev_cb(struct cryptop *);
 820
 821 static struct cryptop_data *
 822 cod_alloc(struct csession *cse, size_t len, struct thread *td)
 823 {
 824         struct cryptop_data *cod;
 825
 826         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 827
 828         cod->cse = cse;
 829         cod->buf = malloc(len, M_XDATA, M_WAITOK);
 830         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 831                 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
 832         return (cod);
 833 }
 834
 835 static void
 836 cod_free(struct cryptop_data *cod)
 837 {
 838
 839         free(cod->obuf, M_XDATA);
 840         free(cod->buf, M_XDATA);
 841         free(cod, M_XDATA);
 842 }
 843
 844 static int
 845 cryptodev_op(
 846         struct csession *cse,
 847         struct crypt_op *cop,
 848         struct ucred *active_cred,
 849         struct thread *td)
 850 {
 851         struct cryptop_data *cod = NULL;
 852         struct cryptop *crp = NULL;
 853         int error;
 854
 855         if (cop->len > 256*1024-4) {
 856                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 857                 return (E2BIG);
 858         }
 859
 860         if (cse->txform) {
 861                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 862                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 863                         return (EINVAL);
 864                 }
 865         }
 866
 867         if (cop->mac && cse->hashsize == 0) {
 868                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 869                 return (EINVAL);
 870         }
 871
 872         /*
 873          * The COP_F_CIPHER_FIRST flag predates explicit session
 874          * modes, but the only way it was used was for EtA so allow it
 875          * as long as it is consistent with EtA.
 876          */
 877         if (cop->flags & COP_F_CIPHER_FIRST) {
 878                 if (cop->op != COP_ENCRYPT) {
 879                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 880                         return (EINVAL);
 881                 }
 882         }
 883
 884         cod = cod_alloc(cse, cop->len + cse->hashsize, td);
 885
 886         crp = crypto_getreq(cse->cses, M_WAITOK);
 887
 888         error = copyin(cop->src, cod->buf, cop->len);
 889         if (error) {
 890                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 891                 goto bail;
 892         }
 893         crp->crp_payload_start = 0;
 894         crp->crp_payload_length = cop->len;
 895         if (cse->hashsize)
 896                 crp->crp_digest_start = cop->len;
 897
 898         switch (cse->mode) {
 899         case CSP_MODE_COMPRESS:
 900                 switch (cop->op) {
 901                 case COP_ENCRYPT:
 902                         crp->crp_op = CRYPTO_OP_COMPRESS;
 903                         break;
 904                 case COP_DECRYPT:
 905                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 906                         break;
 907                 default:
 908                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 909                         error = EINVAL;
 910                         goto bail;
 911                 }
 912                 break;
 913         case CSP_MODE_CIPHER:
 914                 switch (cop->op) {
 915                 case COP_ENCRYPT:
 916                         crp->crp_op = CRYPTO_OP_ENCRYPT;
 917                         break;
 918                 case COP_DECRYPT:
 919                         crp->crp_op = CRYPTO_OP_DECRYPT;
 920                         break;
 921                 default:
 922                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 923                         error = EINVAL;
 924                         goto bail;
 925                 }
 926                 break;
 927         case CSP_MODE_DIGEST:
 928                 switch (cop->op) {
 929                 case 0:
 930                 case COP_ENCRYPT:
 931                 case COP_DECRYPT:
 932                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
 933                         if (cod->obuf != NULL)
 934                                 crp->crp_digest_start = 0;
 935                         break;
 936                 default:
 937                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 938                         error = EINVAL;
 939                         goto bail;
 940                 }
 941                 break;
 942         case CSP_MODE_ETA:
 943                 switch (cop->op) {
 944                 case COP_ENCRYPT:
 945                         crp->crp_op = CRYPTO_OP_ENCRYPT |
 946                             CRYPTO_OP_COMPUTE_DIGEST;
 947                         break;
 948                 case COP_DECRYPT:
 949                         crp->crp_op = CRYPTO_OP_DECRYPT |
 950                             CRYPTO_OP_VERIFY_DIGEST;
 951                         break;
 952                 default:
 953                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 954                         error = EINVAL;
 955                         goto bail;
 956                 }
 957                 break;
 958         default:
 959                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 960                 error = EINVAL;
 961                 goto bail;
 962         }
 963
 964         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
 965         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
 966         if (cod->obuf)
 967                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
 968         crp->crp_callback = cryptodev_cb;
 969         crp->crp_opaque = cod;
 970
 971         if (cop->iv) {
 972                 if (cse->ivsize == 0) {
 973                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 974                         error = EINVAL;
 975                         goto bail;
 976                 }
 977                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
 978                 if (error) {
 979                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 980                         goto bail;
 981                 }
 982                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
 983         } else if (cse->ivsize != 0) {
 984                 crp->crp_iv_start = 0;
 985                 crp->crp_payload_start += cse->ivsize;
 986                 crp->crp_payload_length -= cse->ivsize;
 987                 cop->dst += cse->ivsize;
 988         }
 989
 990         if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
 991                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
 992                     cse->hashsize);
 993                 if (error) {
 994                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 995                         goto bail;
 996                 }
 997         }
 998 again:
 999         /*
1000          * Let the dispatch run unlocked, then, interlock against the
1001          * callback before checking if the operation completed and going
1002          * to sleep.  This insures drivers don't inherit our lock which
1003          * results in a lock order reversal between crypto_dispatch forced
1004          * entry and the crypto_done callback into us.
1005          */
1006         error = crypto_dispatch(crp);
1007         if (error != 0) {
1008                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1009                 goto bail;
1010         }
1011
1012         mtx_lock(&cse->lock);
1013         while (!cod->done)
1014                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1015         mtx_unlock(&cse->lock);
1016
1017         if (crp->crp_etype == EAGAIN) {
1018                 crp->crp_etype = 0;
1019                 crp->crp_flags &= ~CRYPTO_F_DONE;
1020                 cod->done = false;
1021                 goto again;
1022         }
1023
1024         if (crp->crp_etype != 0) {
1025                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1026                 error = crp->crp_etype;
1027                 goto bail;
1028         }
1029
1030         if (cop->dst != NULL) {
1031                 error = copyout(cod->obuf != NULL ? cod->obuf :
1032                     cod->buf + crp->crp_payload_start, cop->dst,
1033                     crp->crp_payload_length);
1034                 if (error) {
1035                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1036                         goto bail;
1037                 }
1038         }
1039
1040         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1041                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1042                     crp->crp_digest_start, cop->mac, cse->hashsize);
1043                 if (error) {
1044                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1045                         goto bail;
1046                 }
1047         }
1048
1049 bail:
1050         crypto_freereq(crp);
1051         cod_free(cod);
1052
1053         return (error);
1054 }
1055
1056 static int
1057 cryptodev_aead(
1058         struct csession *cse,
1059         struct crypt_aead *caead,
1060         struct ucred *active_cred,
1061         struct thread *td)
1062 {
1063         struct cryptop_data *cod = NULL;
1064         struct cryptop *crp = NULL;
1065         int error;
1066
1067         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1068                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1069                 return (E2BIG);
1070         }
1071
1072         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1073             (caead->len % cse->txform->blocksize) != 0) {
1074                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1075                 return (EINVAL);
1076         }
1077
1078         /*
1079          * The COP_F_CIPHER_FIRST flag predates explicit session
1080          * modes, but the only way it was used was for EtA so allow it
1081          * as long as it is consistent with EtA.
1082          */
1083         if (caead->flags & COP_F_CIPHER_FIRST) {
1084                 if (caead->op != COP_ENCRYPT) {
1085                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1086                         return (EINVAL);
1087                 }
1088         }
1089
1090         cod = cod_alloc(cse, caead->aadlen + caead->len + cse->hashsize, td);
1091
1092         crp = crypto_getreq(cse->cses, M_WAITOK);
1093
1094         error = copyin(caead->aad, cod->buf, caead->aadlen);
1095         if (error) {
1096                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1097                 goto bail;
1098         }
1099         crp->crp_aad_start = 0;
1100         crp->crp_aad_length = caead->aadlen;
1101
1102         error = copyin(caead->src, cod->buf + caead->aadlen, caead->len);
1103         if (error) {
1104                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1105                 goto bail;
1106         }
1107         crp->crp_payload_start = caead->aadlen;
1108         crp->crp_payload_length = caead->len;
1109         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1110                 crp->crp_digest_start = caead->len;
1111         else
1112                 crp->crp_digest_start = caead->aadlen + caead->len;
1113
1114         switch (cse->mode) {
1115         case CSP_MODE_AEAD:
1116         case CSP_MODE_ETA:
1117                 switch (caead->op) {
1118                 case COP_ENCRYPT:
1119                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1120                             CRYPTO_OP_COMPUTE_DIGEST;
1121                         break;
1122                 case COP_DECRYPT:
1123                         crp->crp_op = CRYPTO_OP_DECRYPT |
1124                             CRYPTO_OP_VERIFY_DIGEST;
1125                         break;
1126                 default:
1127                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1128                         error = EINVAL;
1129                         goto bail;
1130                 }
1131                 break;
1132         default:
1133                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1134                 error = EINVAL;
1135                 goto bail;
1136         }
1137
1138         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1139         crypto_use_buf(crp, cod->buf, caead->aadlen + caead->len +
1140             cse->hashsize);
1141         if (cod->obuf != NULL)
1142                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1143                     cse->hashsize);
1144         crp->crp_callback = cryptodev_cb;
1145         crp->crp_opaque = cod;
1146
1147         if (caead->iv) {
1148                 /*
1149                  * Permit a 16-byte IV for AES-XTS, but only use the
1150                  * first 8 bytes as a block number.
1151                  */
1152                 if (cse->mode == CSP_MODE_ETA &&
1153                     caead->ivlen == AES_BLOCK_LEN &&
1154                     cse->ivsize == AES_XTS_IV_LEN)
1155                         caead->ivlen = AES_XTS_IV_LEN;
1156
1157                 if (caead->ivlen != cse->ivsize) {
1158                         error = EINVAL;
1159                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1160                         goto bail;
1161                 }
1162
1163                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1164                 if (error) {
1165                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1166                         goto bail;
1167                 }
1168                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1169         } else {
1170                 crp->crp_iv_start = crp->crp_payload_start;
1171                 crp->crp_payload_start += cse->ivsize;
1172                 crp->crp_payload_length -= cse->ivsize;
1173                 caead->dst += cse->ivsize;
1174         }
1175
1176         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1177                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1178                     cse->hashsize);
1179                 if (error) {
1180                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1181                         goto bail;
1182                 }
1183         }
1184 again:
1185         /*
1186          * Let the dispatch run unlocked, then, interlock against the
1187          * callback before checking if the operation completed and going
1188          * to sleep.  This insures drivers don't inherit our lock which
1189          * results in a lock order reversal between crypto_dispatch forced
1190          * entry and the crypto_done callback into us.
1191          */
1192         error = crypto_dispatch(crp);
1193         if (error != 0) {
1194                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1195                 goto bail;
1196         }
1197
1198         mtx_lock(&cse->lock);
1199         while (!cod->done)
1200                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1201         mtx_unlock(&cse->lock);
1202
1203         if (crp->crp_etype == EAGAIN) {
1204                 crp->crp_etype = 0;
1205                 crp->crp_flags &= ~CRYPTO_F_DONE;
1206                 cod->done = false;
1207                 goto again;
1208         }
1209
1210         if (crp->crp_etype != 0) {
1211                 error = crp->crp_etype;
1212                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1213                 goto bail;
1214         }
1215
1216         if (caead->dst != NULL) {
1217                 error = copyout(cod->obuf != NULL ? cod->obuf :
1218                     cod->buf + crp->crp_payload_start, caead->dst,
1219                     crp->crp_payload_length);
1220                 if (error) {
1221                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1222                         goto bail;
1223                 }
1224         }
1225
1226         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1227                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1228                     crp->crp_digest_start, caead->tag, cse->hashsize);
1229                 if (error) {
1230                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1231                         goto bail;
1232                 }
1233         }
1234
1235 bail:
1236         crypto_freereq(crp);
1237         cod_free(cod);
1238
1239         return (error);
1240 }
1241
1242 static int
1243 cryptodev_cb(struct cryptop *crp)
1244 {
1245         struct cryptop_data *cod = crp->crp_opaque;
1246
1247         /*
1248          * Lock to ensure the wakeup() is not missed by the loops
1249          * waiting on cod->done in cryptodev_op() and
1250          * cryptodev_aead().
1251          */
1252         mtx_lock(&cod->cse->lock);
1253         cod->done = true;
1254         mtx_unlock(&cod->cse->lock);
1255         wakeup(cod);
1256         return (0);
1257 }
1258
1259 static void
1260 cryptodevkey_cb(struct cryptkop *krp)
1261 {
1262
1263         wakeup_one(krp);
1264 }
1265
1266 static int
1267 cryptodev_key(struct crypt_kop *kop)
1268 {
1269         struct cryptkop *krp = NULL;
1270         int error = EINVAL;
1271         int in, out, size, i;
1272
1273         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1274                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1275                 return (EFBIG);
1276         }
1277
1278         in = kop->crk_iparams;
1279         out = kop->crk_oparams;
1280         switch (kop->crk_op) {
1281         case CRK_MOD_EXP:
1282                 if (in == 3 && out == 1)
1283                         break;
1284                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1285                 return (EINVAL);
1286         case CRK_MOD_EXP_CRT:
1287                 if (in == 6 && out == 1)
1288                         break;
1289                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1290                 return (EINVAL);
1291         case CRK_DSA_SIGN:
1292                 if (in == 5 && out == 2)
1293                         break;
1294                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1295                 return (EINVAL);
1296         case CRK_DSA_VERIFY:
1297                 if (in == 7 && out == 0)
1298                         break;
1299                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1300                 return (EINVAL);
1301         case CRK_DH_COMPUTE_KEY:
1302                 if (in == 3 && out == 1)
1303                         break;
1304                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1305                 return (EINVAL);
1306         default:
1307                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1308                 return (EINVAL);
1309         }
1310
1311         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1312         if (!krp) {
1313                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1314                 return (ENOMEM);
1315         }
1316         krp->krp_op = kop->crk_op;
1317         krp->krp_status = kop->crk_status;
1318         krp->krp_iparams = kop->crk_iparams;
1319         krp->krp_oparams = kop->crk_oparams;
1320         krp->krp_crid = kop->crk_crid;
1321         krp->krp_status = 0;
1322         krp->krp_callback = cryptodevkey_cb;
1323
1324         for (i = 0; i < CRK_MAXPARAM; i++) {
1325                 if (kop->crk_param[i].crp_nbits > 65536) {
1326                         /* Limit is the same as in OpenBSD */
1327                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1328                         goto fail;
1329                 }
1330                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1331         }
1332         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1333                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1334                 if (size == 0)
1335                         continue;
1336                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1337                 if (i >= krp->krp_iparams)
1338                         continue;
1339                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1340                 if (error) {
1341                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1342                         goto fail;
1343                 }
1344         }
1345
1346         error = crypto_kdispatch(krp);
1347         if (error) {
1348                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1349                 goto fail;
1350         }
1351         error = tsleep(krp, PSOCK, "crydev", 0);
1352         if (error) {
1353                 /* XXX can this happen?  if so, how do we recover? */
1354                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1355                 goto fail;
1356         }
1357
1358         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1359         if (krp->krp_status != 0) {
1360                 error = krp->krp_status;
1361                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1362                 goto fail;
1363         }
1364
1365         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1366                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1367                 if (size == 0)
1368                         continue;
1369                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1370                 if (error) {
1371                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1372                         goto fail;
1373                 }
1374         }
1375
1376 fail:
1377         if (krp) {
1378                 kop->crk_status = krp->krp_status;
1379                 for (i = 0; i < CRK_MAXPARAM; i++) {
1380                         if (krp->krp_param[i].crp_p)
1381                                 free(krp->krp_param[i].crp_p, M_XDATA);
1382                 }
1383                 free(krp, M_XDATA);
1384         }
1385         return (error);
1386 }
1387
1388 static int
1389 cryptodev_find(struct crypt_find_op *find)
1390 {
1391         device_t dev;
1392         size_t fnlen = sizeof find->name;
1393
1394         if (find->crid != -1) {
1395                 dev = crypto_find_device_byhid(find->crid);
1396                 if (dev == NULL)
1397                         return (ENOENT);
1398                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1399                 find->name[fnlen - 1] = '\x0';
1400         } else {
1401                 find->name[fnlen - 1] = '\x0';
1402                 find->crid = crypto_find_driver(find->name);
1403                 if (find->crid == -1)
1404                         return (ENOENT);
1405         }
1406         return (0);
1407 }
1408
1409 /* ARGSUSED */
1410 static int
1411 cryptof_stat(
1412         struct file *fp,
1413         struct stat *sb,
1414         struct ucred *active_cred,
1415         struct thread *td)
1416 {
1417
1418         return (EOPNOTSUPP);
1419 }
1420
1421 /* ARGSUSED */
1422 static int
1423 cryptof_close(struct file *fp, struct thread *td)
1424 {
1425         struct fcrypt *fcr = fp->f_data;
1426         struct csession *cse;
1427
1428         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1429                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1430                 KASSERT(cse->refs == 1,
1431                     ("%s: crypto session %p with %d refs", __func__, cse,
1432                     cse->refs));
1433                 csefree(cse);
1434         }
1435         free(fcr, M_XDATA);
1436         fp->f_data = NULL;
1437         return 0;
1438 }
1439
1440 static int
1441 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1442 {
1443
1444         kif->kf_type = KF_TYPE_CRYPTO;
1445         return (0);
1446 }
1447
1448 static struct csession *
1449 csefind(struct fcrypt *fcr, u_int ses)
1450 {
1451         struct csession *cse;
1452
1453         mtx_lock(&fcr->lock);
1454         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1455                 if (cse->ses == ses) {
1456                         refcount_acquire(&cse->refs);
1457                         mtx_unlock(&fcr->lock);
1458                         return (cse);
1459                 }
1460         }
1461         mtx_unlock(&fcr->lock);
1462         return (NULL);
1463 }
1464
1465 static bool
1466 csedelete(struct fcrypt *fcr, u_int ses)
1467 {
1468         struct csession *cse;
1469
1470         mtx_lock(&fcr->lock);
1471         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1472                 if (cse->ses == ses) {
1473                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1474                         mtx_unlock(&fcr->lock);
1475                         csefree(cse);
1476                         return (true);
1477                 }
1478         }
1479         mtx_unlock(&fcr->lock);
1480         return (false);
1481 }
1482
1483 struct csession *
1484 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1485     struct crypto_session_params *csp, struct enc_xform *txform,
1486     void *key, struct auth_hash *thash, void *mackey)
1487 {
1488         struct csession *cse;
1489
1490         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1491         if (cse == NULL)
1492                 return NULL;
1493         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1494         refcount_init(&cse->refs, 1);
1495         cse->key = key;
1496         cse->mackey = mackey;
1497         cse->mode = csp->csp_mode;
1498         cse->cses = cses;
1499         cse->txform = txform;
1500         if (thash != NULL)
1501                 cse->hashsize = thash->hashsize;
1502         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1503                 cse->hashsize = AES_GMAC_HASH_LEN;
1504         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1505                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1506         cse->ivsize = csp->csp_ivlen;
1507         mtx_lock(&fcr->lock);
1508         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1509         cse->ses = fcr->sesn++;
1510         mtx_unlock(&fcr->lock);
1511         return (cse);
1512 }
1513
1514 static void
1515 csefree(struct csession *cse)
1516 {
1517
1518         if (!refcount_release(&cse->refs))
1519                 return;
1520         crypto_freesession(cse->cses);
1521         mtx_destroy(&cse->lock);
1522         if (cse->key)
1523                 free(cse->key, M_XDATA);
1524         if (cse->mackey)
1525                 free(cse->mackey, M_XDATA);
1526         free(cse, M_XDATA);
1527 }
1528
1529 static int
1530 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1531 {
1532         struct file *f;
1533         struct fcrypt *fcr;
1534         int fd, error;
1535
1536         switch (cmd) {
1537         case CRIOGET:
1538                 error = falloc_noinstall(td, &f);
1539                 if (error)
1540                         break;
1541
1542                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1543                 TAILQ_INIT(&fcr->csessions);
1544                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1545
1546                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1547                 error = finstall(td, f, &fd, 0, NULL);
1548                 if (error) {
1549                         mtx_destroy(&fcr->lock);
1550                         free(fcr, M_XDATA);
1551                 } else
1552                         *(uint32_t *)data = fd;
1553                 fdrop(f, td);
1554                 break;
1555         case CRIOFINDDEV:
1556                 error = cryptodev_find((struct crypt_find_op *)data);
1557                 break;
1558         case CRIOASYMFEAT:
1559                 error = crypto_getfeat((int *)data);
1560                 break;
1561         default:
1562                 error = EINVAL;
1563                 break;
1564         }
1565         return (error);
1566 }
1567
1568 static struct cdevsw crypto_cdevsw = {
1569         .d_version =    D_VERSION,
1570         .d_ioctl =      cryptoioctl,
1571         .d_name =       "crypto",
1572 };
1573 static struct cdev *crypto_dev;
1574
1575 /*
1576  * Initialization code, both for static and dynamic loading.
1577  */
1578 static int
1579 cryptodev_modevent(module_t mod, int type, void *unused)
1580 {
1581         switch (type) {
1582         case MOD_LOAD:
1583                 if (bootverbose)
1584                         printf("crypto: <crypto device>\n");
1585                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1586                                       UID_ROOT, GID_WHEEL, 0666,
1587                                       "crypto");
1588                 return 0;
1589         case MOD_UNLOAD:
1590                 /*XXX disallow if active sessions */
1591                 destroy_dev(crypto_dev);
1592                 return 0;
1593         }
1594         return EINVAL;
1595 }
1596
1597 static moduledata_t cryptodev_mod = {
1598         "cryptodev",
1599         cryptodev_modevent,
1600         0
1601 };
1602 MODULE_VERSION(cryptodev, 1);
1603 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1604 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1605 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);