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         char            *aad;
 287         bool            done;
 288 };
 289
 290 struct fcrypt {
 291         TAILQ_HEAD(csessionlist, csession) csessions;
 292         int             sesn;
 293         struct mtx      lock;
 294 };
 295
 296 static bool use_outputbuffers;
 297 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
 298     &use_outputbuffers, 0,
 299     "Use separate output buffers for /dev/crypto requests.");
 300
 301 static bool use_separate_aad;
 302 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
 303     &use_separate_aad, 0,
 304     "Use separate AAD buffer for /dev/crypto requests.");
 305
 306 static  int cryptof_ioctl(struct file *, u_long, void *,
 307                     struct ucred *, struct thread *);
 308 static  int cryptof_stat(struct file *, struct stat *,
 309                     struct ucred *, struct thread *);
 310 static  int cryptof_close(struct file *, struct thread *);
 311 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 312                     struct filedesc *);
 313
 314 static struct fileops cryptofops = {
 315     .fo_read = invfo_rdwr,
 316     .fo_write = invfo_rdwr,
 317     .fo_truncate = invfo_truncate,
 318     .fo_ioctl = cryptof_ioctl,
 319     .fo_poll = invfo_poll,
 320     .fo_kqfilter = invfo_kqfilter,
 321     .fo_stat = cryptof_stat,
 322     .fo_close = cryptof_close,
 323     .fo_chmod = invfo_chmod,
 324     .fo_chown = invfo_chown,
 325     .fo_sendfile = invfo_sendfile,
 326     .fo_fill_kinfo = cryptof_fill_kinfo,
 327 };
 328
 329 static struct csession *csefind(struct fcrypt *, u_int);
 330 static bool csedelete(struct fcrypt *, u_int);
 331 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 332     struct crypto_session_params *, struct enc_xform *, void *,
 333     struct auth_hash *, void *);
 334 static void csefree(struct csession *);
 335
 336 static  int cryptodev_op(struct csession *, struct crypt_op *,
 337                         struct ucred *, struct thread *td);
 338 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 339                         struct ucred *, struct thread *);
 340 static  int cryptodev_key(struct crypt_kop *);
 341 static  int cryptodev_find(struct crypt_find_op *);
 342
 343 /*
 344  * Check a crypto identifier to see if it requested
 345  * a software device/driver.  This can be done either
 346  * by device name/class or through search constraints.
 347  */
 348 static int
 349 checkforsoftware(int *cridp)
 350 {
 351         int crid;
 352
 353         crid = *cridp;
 354
 355         if (!crypto_devallowsoft) {
 356                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 357                         if (crid & CRYPTOCAP_F_HARDWARE) {
 358                                 *cridp = CRYPTOCAP_F_HARDWARE;
 359                                 return 0;
 360                         }
 361                         return EINVAL;
 362                 }
 363                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 364                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 365                         return EINVAL;
 366         }
 367         return 0;
 368 }
 369
 370 /* ARGSUSED */
 371 static int
 372 cryptof_ioctl(
 373         struct file *fp,
 374         u_long cmd,
 375         void *data,
 376         struct ucred *active_cred,
 377         struct thread *td)
 378 {
 379 #define SES2(p) ((struct session2_op *)p)
 380         struct crypto_session_params csp;
 381         struct fcrypt *fcr = fp->f_data;
 382         struct csession *cse;
 383         struct session_op *sop;
 384         struct crypt_op *cop;
 385         struct crypt_aead *caead;
 386         struct enc_xform *txform = NULL;
 387         struct auth_hash *thash = NULL;
 388         void *key = NULL;
 389         void *mackey = NULL;
 390         struct crypt_kop *kop;
 391         crypto_session_t cses;
 392         u_int32_t ses;
 393         int error = 0, crid;
 394 #ifdef COMPAT_FREEBSD32
 395         struct session2_op sopc;
 396         struct crypt_op copc;
 397         struct crypt_kop kopc;
 398 #endif
 399
 400         switch (cmd) {
 401         case CIOCGSESSION:
 402         case CIOCGSESSION2:
 403 #ifdef COMPAT_FREEBSD32
 404         case CIOCGSESSION32:
 405         case CIOCGSESSION232:
 406                 if (cmd == CIOCGSESSION32) {
 407                         session_op_from_32(data, (struct session_op *)&sopc);
 408                         sop = (struct session_op *)&sopc;
 409                 } else if (cmd == CIOCGSESSION232) {
 410                         session2_op_from_32(data, &sopc);
 411                         sop = (struct session_op *)&sopc;
 412                 } else
 413 #endif
 414                         sop = (struct session_op *)data;
 415                 switch (sop->cipher) {
 416                 case 0:
 417                         break;
 418                 case CRYPTO_AES_CBC:
 419                         txform = &enc_xform_rijndael128;
 420                         break;
 421                 case CRYPTO_AES_XTS:
 422                         txform = &enc_xform_aes_xts;
 423                         break;
 424                 case CRYPTO_NULL_CBC:
 425                         txform = &enc_xform_null;
 426                         break;
 427                 case CRYPTO_CAMELLIA_CBC:
 428                         txform = &enc_xform_camellia;
 429                         break;
 430                 case CRYPTO_AES_ICM:
 431                         txform = &enc_xform_aes_icm;
 432                         break;
 433                 case CRYPTO_AES_NIST_GCM_16:
 434                         txform = &enc_xform_aes_nist_gcm;
 435                         break;
 436                 case CRYPTO_CHACHA20:
 437                         txform = &enc_xform_chacha20;
 438                         break;
 439                 case CRYPTO_AES_CCM_16:
 440                         txform = &enc_xform_ccm;
 441                         break;
 442
 443                 default:
 444                         CRYPTDEB("invalid cipher");
 445                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 446                         return (EINVAL);
 447                 }
 448
 449                 switch (sop->mac) {
 450                 case 0:
 451                         break;
 452                 case CRYPTO_POLY1305:
 453                         thash = &auth_hash_poly1305;
 454                         break;
 455                 case CRYPTO_SHA1_HMAC:
 456                         thash = &auth_hash_hmac_sha1;
 457                         break;
 458                 case CRYPTO_SHA2_224_HMAC:
 459                         thash = &auth_hash_hmac_sha2_224;
 460                         break;
 461                 case CRYPTO_SHA2_256_HMAC:
 462                         thash = &auth_hash_hmac_sha2_256;
 463                         break;
 464                 case CRYPTO_SHA2_384_HMAC:
 465                         thash = &auth_hash_hmac_sha2_384;
 466                         break;
 467                 case CRYPTO_SHA2_512_HMAC:
 468                         thash = &auth_hash_hmac_sha2_512;
 469                         break;
 470                 case CRYPTO_RIPEMD160_HMAC:
 471                         thash = &auth_hash_hmac_ripemd_160;
 472                         break;
 473 #ifdef COMPAT_FREEBSD12
 474                 case CRYPTO_AES_128_NIST_GMAC:
 475                 case CRYPTO_AES_192_NIST_GMAC:
 476                 case CRYPTO_AES_256_NIST_GMAC:
 477                         /* Should always be paired with GCM. */
 478                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 479                                 CRYPTDEB("GMAC without GCM");
 480                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 481                                     __LINE__);
 482                                 return (EINVAL);
 483                         }
 484                         break;
 485 #endif
 486                 case CRYPTO_AES_NIST_GMAC:
 487                         switch (sop->mackeylen * 8) {
 488                         case 128:
 489                                 thash = &auth_hash_nist_gmac_aes_128;
 490                                 break;
 491                         case 192:
 492                                 thash = &auth_hash_nist_gmac_aes_192;
 493                                 break;
 494                         case 256:
 495                                 thash = &auth_hash_nist_gmac_aes_256;
 496                                 break;
 497                         default:
 498                                 CRYPTDEB("invalid GMAC key length");
 499                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 500                                     __LINE__);
 501                                 return (EINVAL);
 502                         }
 503                         break;
 504                 case CRYPTO_AES_CCM_CBC_MAC:
 505                         switch (sop->mackeylen) {
 506                         case 16:
 507                                 thash = &auth_hash_ccm_cbc_mac_128;
 508                                 break;
 509                         case 24:
 510                                 thash = &auth_hash_ccm_cbc_mac_192;
 511                                 break;
 512                         case 32:
 513                                 thash = &auth_hash_ccm_cbc_mac_256;
 514                                 break;
 515                         default:
 516                                 CRYPTDEB("Invalid CBC MAC key size %d",
 517                                     sop->keylen);
 518                                 SDT_PROBE1(opencrypto, dev, ioctl,
 519                                     error, __LINE__);
 520                                 return (EINVAL);
 521                         }
 522                         break;
 523                 case CRYPTO_SHA1:
 524                         thash = &auth_hash_sha1;
 525                         break;
 526                 case CRYPTO_SHA2_224:
 527                         thash = &auth_hash_sha2_224;
 528                         break;
 529                 case CRYPTO_SHA2_256:
 530                         thash = &auth_hash_sha2_256;
 531                         break;
 532                 case CRYPTO_SHA2_384:
 533                         thash = &auth_hash_sha2_384;
 534                         break;
 535                 case CRYPTO_SHA2_512:
 536                         thash = &auth_hash_sha2_512;
 537                         break;
 538
 539                 case CRYPTO_NULL_HMAC:
 540                         thash = &auth_hash_null;
 541                         break;
 542
 543                 case CRYPTO_BLAKE2B:
 544                         thash = &auth_hash_blake2b;
 545                         break;
 546                 case CRYPTO_BLAKE2S:
 547                         thash = &auth_hash_blake2s;
 548                         break;
 549
 550                 default:
 551                         CRYPTDEB("invalid mac");
 552                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 553                         return (EINVAL);
 554                 }
 555
 556                 if (txform == NULL && thash == NULL) {
 557                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 558                         return (EINVAL);
 559                 }
 560
 561                 memset(&csp, 0, sizeof(csp));
 562                 if (use_outputbuffers)
 563                         csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 564
 565                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 566                         switch (sop->mac) {
 567 #ifdef COMPAT_FREEBSD12
 568                         case CRYPTO_AES_128_NIST_GMAC:
 569                         case CRYPTO_AES_192_NIST_GMAC:
 570                         case CRYPTO_AES_256_NIST_GMAC:
 571                                 if (sop->keylen != sop->mackeylen) {
 572                                         SDT_PROBE1(opencrypto, dev, ioctl,
 573                                             error, __LINE__);
 574                                         return (EINVAL);
 575                                 }
 576                                 break;
 577 #endif
 578                         case 0:
 579                                 break;
 580                         default:
 581                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 582                                     __LINE__);
 583                                 return (EINVAL);
 584                         }
 585                         csp.csp_mode = CSP_MODE_AEAD;
 586                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 587                         switch (sop->mac) {
 588 #ifdef COMPAT_FREEBSD12
 589                         case CRYPTO_AES_CCM_CBC_MAC:
 590                                 if (sop->keylen != sop->mackeylen) {
 591                                         SDT_PROBE1(opencrypto, dev, ioctl,
 592                                             error, __LINE__);
 593                                         return (EINVAL);
 594                                 }
 595                                 thash = NULL;
 596                                 break;
 597 #endif
 598                         case 0:
 599                                 break;
 600                         default:
 601                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 602                                     __LINE__);
 603                                 return (EINVAL);
 604                         }
 605                         csp.csp_mode = CSP_MODE_AEAD;
 606                 } else if (txform && thash)
 607                         csp.csp_mode = CSP_MODE_ETA;
 608                 else if (txform)
 609                         csp.csp_mode = CSP_MODE_CIPHER;
 610                 else
 611                         csp.csp_mode = CSP_MODE_DIGEST;
 612
 613                 switch (csp.csp_mode) {
 614                 case CSP_MODE_AEAD:
 615                 case CSP_MODE_ETA:
 616                         if (use_separate_aad)
 617                                 csp.csp_flags |= CSP_F_SEPARATE_AAD;
 618                         break;
 619                 }
 620
 621                 if (txform) {
 622                         csp.csp_cipher_alg = txform->type;
 623                         csp.csp_cipher_klen = sop->keylen;
 624                         if (sop->keylen > txform->maxkey ||
 625                             sop->keylen < txform->minkey) {
 626                                 CRYPTDEB("invalid cipher parameters");
 627                                 error = EINVAL;
 628                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 629                                     __LINE__);
 630                                 goto bail;
 631                         }
 632
 633                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 634                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 635                         if (error) {
 636                                 CRYPTDEB("invalid key");
 637                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 638                                     __LINE__);
 639                                 goto bail;
 640                         }
 641                         csp.csp_cipher_key = key;
 642                         csp.csp_ivlen = txform->ivsize;
 643                 }
 644
 645                 if (thash) {
 646                         csp.csp_auth_alg = thash->type;
 647                         csp.csp_auth_klen = sop->mackeylen;
 648                         if (sop->mackeylen > thash->keysize ||
 649                             sop->mackeylen < 0) {
 650                                 CRYPTDEB("invalid mac key length");
 651                                 error = EINVAL;
 652                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 653                                     __LINE__);
 654                                 goto bail;
 655                         }
 656
 657                         if (csp.csp_auth_klen) {
 658                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 659                                     M_WAITOK);
 660                                 error = copyin(sop->mackey, mackey,
 661                                     csp.csp_auth_klen);
 662                                 if (error) {
 663                                         CRYPTDEB("invalid mac key");
 664                                         SDT_PROBE1(opencrypto, dev, ioctl,
 665                                             error, __LINE__);
 666                                         goto bail;
 667                                 }
 668                                 csp.csp_auth_key = mackey;
 669                         }
 670
 671                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 672                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 673                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 674                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 675                 }
 676
 677                 /* NB: CIOCGSESSION2 has the crid */
 678                 if (cmd == CIOCGSESSION2
 679 #ifdef COMPAT_FREEBSD32
 680                     || cmd == CIOCGSESSION232
 681 #endif
 682                         ) {
 683                         crid = SES2(sop)->crid;
 684                         error = checkforsoftware(&crid);
 685                         if (error) {
 686                                 CRYPTDEB("checkforsoftware");
 687                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 688                                     __LINE__);
 689                                 goto bail;
 690                         }
 691                 } else
 692                         crid = CRYPTOCAP_F_HARDWARE;
 693                 error = crypto_newsession(&cses, &csp, crid);
 694                 if (error) {
 695                         CRYPTDEB("crypto_newsession");
 696                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 697                         goto bail;
 698                 }
 699
 700                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 701
 702                 if (cse == NULL) {
 703                         crypto_freesession(cses);
 704                         error = EINVAL;
 705                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 706                         CRYPTDEB("csecreate");
 707                         goto bail;
 708                 }
 709                 sop->ses = cse->ses;
 710                 if (cmd == CIOCGSESSION2
 711 #ifdef COMPAT_FREEBSD32
 712                     || cmd == CIOCGSESSION232
 713 #endif
 714                     ) {
 715                         /* return hardware/driver id */
 716                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 717                 }
 718 bail:
 719                 if (error) {
 720                         free(key, M_XDATA);
 721                         free(mackey, M_XDATA);
 722                 }
 723 #ifdef COMPAT_FREEBSD32
 724                 else {
 725                         if (cmd == CIOCGSESSION32)
 726                                 session_op_to_32(sop, data);
 727                         else if (cmd == CIOCGSESSION232)
 728                                 session2_op_to_32((struct session2_op *)sop,
 729                                     data);
 730                 }
 731 #endif
 732                 break;
 733         case CIOCFSESSION:
 734                 ses = *(u_int32_t *)data;
 735                 if (!csedelete(fcr, ses)) {
 736                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 737                         return (EINVAL);
 738                 }
 739                 break;
 740         case CIOCCRYPT:
 741 #ifdef COMPAT_FREEBSD32
 742         case CIOCCRYPT32:
 743                 if (cmd == CIOCCRYPT32) {
 744                         cop = &copc;
 745                         crypt_op_from_32(data, cop);
 746                 } else
 747 #endif
 748                         cop = (struct crypt_op *)data;
 749                 cse = csefind(fcr, cop->ses);
 750                 if (cse == NULL) {
 751                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 752                         return (EINVAL);
 753                 }
 754                 error = cryptodev_op(cse, cop, active_cred, td);
 755                 csefree(cse);
 756 #ifdef COMPAT_FREEBSD32
 757                 if (error == 0 && cmd == CIOCCRYPT32)
 758                         crypt_op_to_32(cop, data);
 759 #endif
 760                 break;
 761         case CIOCKEY:
 762         case CIOCKEY2:
 763 #ifdef COMPAT_FREEBSD32
 764         case CIOCKEY32:
 765         case CIOCKEY232:
 766 #endif
 767                 if (!crypto_userasymcrypto) {
 768                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 769                         return (EPERM);         /* XXX compat? */
 770                 }
 771 #ifdef COMPAT_FREEBSD32
 772                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 773                         kop = &kopc;
 774                         crypt_kop_from_32(data, kop);
 775                 } else
 776 #endif
 777                         kop = (struct crypt_kop *)data;
 778                 if (cmd == CIOCKEY
 779 #ifdef COMPAT_FREEBSD32
 780                     || cmd == CIOCKEY32
 781 #endif
 782                     ) {
 783                         /* NB: crypto core enforces s/w driver use */
 784                         kop->crk_crid =
 785                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 786                 }
 787                 mtx_lock(&Giant);
 788                 error = cryptodev_key(kop);
 789                 mtx_unlock(&Giant);
 790 #ifdef COMPAT_FREEBSD32
 791                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 792                         crypt_kop_to_32(kop, data);
 793 #endif
 794                 break;
 795         case CIOCASYMFEAT:
 796                 if (!crypto_userasymcrypto) {
 797                         /*
 798                          * NB: if user asym crypto operations are
 799                          * not permitted return "no algorithms"
 800                          * so well-behaved applications will just
 801                          * fallback to doing them in software.
 802                          */
 803                         *(int *)data = 0;
 804                 } else {
 805                         error = crypto_getfeat((int *)data);
 806                         if (error)
 807                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 808                                     __LINE__);
 809                 }
 810                 break;
 811         case CIOCFINDDEV:
 812                 error = cryptodev_find((struct crypt_find_op *)data);
 813                 break;
 814         case CIOCCRYPTAEAD:
 815                 caead = (struct crypt_aead *)data;
 816                 cse = csefind(fcr, caead->ses);
 817                 if (cse == NULL) {
 818                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 819                         return (EINVAL);
 820                 }
 821                 error = cryptodev_aead(cse, caead, active_cred, td);
 822                 csefree(cse);
 823                 break;
 824         default:
 825                 error = EINVAL;
 826                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 827                 break;
 828         }
 829         return (error);
 830 #undef SES2
 831 }
 832
 833 static int cryptodev_cb(struct cryptop *);
 834
 835 static struct cryptop_data *
 836 cod_alloc(struct csession *cse, size_t aad_len, size_t len, struct thread *td)
 837 {
 838         struct cryptop_data *cod;
 839
 840         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 841
 842         cod->cse = cse;
 843         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
 844                 if (aad_len != 0)
 845                         cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
 846                 cod->buf = malloc(len, M_XDATA, M_WAITOK);
 847         } else
 848                 cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
 849         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 850                 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
 851         return (cod);
 852 }
 853
 854 static void
 855 cod_free(struct cryptop_data *cod)
 856 {
 857
 858         free(cod->aad, M_XDATA);
 859         free(cod->obuf, M_XDATA);
 860         free(cod->buf, M_XDATA);
 861         free(cod, M_XDATA);
 862 }
 863
 864 static int
 865 cryptodev_op(
 866         struct csession *cse,
 867         struct crypt_op *cop,
 868         struct ucred *active_cred,
 869         struct thread *td)
 870 {
 871         struct cryptop_data *cod = NULL;
 872         struct cryptop *crp = NULL;
 873         int error;
 874
 875         if (cop->len > 256*1024-4) {
 876                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 877                 return (E2BIG);
 878         }
 879
 880         if (cse->txform) {
 881                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 882                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 883                         return (EINVAL);
 884                 }
 885         }
 886
 887         if (cop->mac && cse->hashsize == 0) {
 888                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 889                 return (EINVAL);
 890         }
 891
 892         /*
 893          * The COP_F_CIPHER_FIRST flag predates explicit session
 894          * modes, but the only way it was used was for EtA so allow it
 895          * as long as it is consistent with EtA.
 896          */
 897         if (cop->flags & COP_F_CIPHER_FIRST) {
 898                 if (cop->op != COP_ENCRYPT) {
 899                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 900                         return (EINVAL);
 901                 }
 902         }
 903
 904         cod = cod_alloc(cse, 0, cop->len + cse->hashsize, td);
 905
 906         crp = crypto_getreq(cse->cses, M_WAITOK);
 907
 908         error = copyin(cop->src, cod->buf, cop->len);
 909         if (error) {
 910                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 911                 goto bail;
 912         }
 913         crp->crp_payload_start = 0;
 914         crp->crp_payload_length = cop->len;
 915         if (cse->hashsize)
 916                 crp->crp_digest_start = cop->len;
 917
 918         switch (cse->mode) {
 919         case CSP_MODE_COMPRESS:
 920                 switch (cop->op) {
 921                 case COP_ENCRYPT:
 922                         crp->crp_op = CRYPTO_OP_COMPRESS;
 923                         break;
 924                 case COP_DECRYPT:
 925                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 926                         break;
 927                 default:
 928                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 929                         error = EINVAL;
 930                         goto bail;
 931                 }
 932                 break;
 933         case CSP_MODE_CIPHER:
 934                 switch (cop->op) {
 935                 case COP_ENCRYPT:
 936                         crp->crp_op = CRYPTO_OP_ENCRYPT;
 937                         break;
 938                 case COP_DECRYPT:
 939                         crp->crp_op = CRYPTO_OP_DECRYPT;
 940                         break;
 941                 default:
 942                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 943                         error = EINVAL;
 944                         goto bail;
 945                 }
 946                 break;
 947         case CSP_MODE_DIGEST:
 948                 switch (cop->op) {
 949                 case 0:
 950                 case COP_ENCRYPT:
 951                 case COP_DECRYPT:
 952                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
 953                         if (cod->obuf != NULL)
 954                                 crp->crp_digest_start = 0;
 955                         break;
 956                 default:
 957                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 958                         error = EINVAL;
 959                         goto bail;
 960                 }
 961                 break;
 962         case CSP_MODE_ETA:
 963                 switch (cop->op) {
 964                 case COP_ENCRYPT:
 965                         crp->crp_op = CRYPTO_OP_ENCRYPT |
 966                             CRYPTO_OP_COMPUTE_DIGEST;
 967                         break;
 968                 case COP_DECRYPT:
 969                         crp->crp_op = CRYPTO_OP_DECRYPT |
 970                             CRYPTO_OP_VERIFY_DIGEST;
 971                         break;
 972                 default:
 973                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 974                         error = EINVAL;
 975                         goto bail;
 976                 }
 977                 break;
 978         default:
 979                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 980                 error = EINVAL;
 981                 goto bail;
 982         }
 983
 984         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
 985         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
 986         if (cod->obuf)
 987                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
 988         crp->crp_callback = cryptodev_cb;
 989         crp->crp_opaque = cod;
 990
 991         if (cop->iv) {
 992                 if (cse->ivsize == 0) {
 993                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 994                         error = EINVAL;
 995                         goto bail;
 996                 }
 997                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
 998                 if (error) {
 999                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1000                         goto bail;
1001                 }
1002                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1003         } else if (cse->ivsize != 0) {
1004                 crp->crp_iv_start = 0;
1005                 crp->crp_payload_start += cse->ivsize;
1006                 crp->crp_payload_length -= cse->ivsize;
1007                 cop->dst += cse->ivsize;
1008         }
1009
1010         if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1011                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
1012                     cse->hashsize);
1013                 if (error) {
1014                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1015                         goto bail;
1016                 }
1017         }
1018 again:
1019         /*
1020          * Let the dispatch run unlocked, then, interlock against the
1021          * callback before checking if the operation completed and going
1022          * to sleep.  This insures drivers don't inherit our lock which
1023          * results in a lock order reversal between crypto_dispatch forced
1024          * entry and the crypto_done callback into us.
1025          */
1026         error = crypto_dispatch(crp);
1027         if (error != 0) {
1028                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1029                 goto bail;
1030         }
1031
1032         mtx_lock(&cse->lock);
1033         while (!cod->done)
1034                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1035         mtx_unlock(&cse->lock);
1036
1037         if (crp->crp_etype == EAGAIN) {
1038                 crp->crp_etype = 0;
1039                 crp->crp_flags &= ~CRYPTO_F_DONE;
1040                 cod->done = false;
1041                 goto again;
1042         }
1043
1044         if (crp->crp_etype != 0) {
1045                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1046                 error = crp->crp_etype;
1047                 goto bail;
1048         }
1049
1050         if (cop->dst != NULL) {
1051                 error = copyout(cod->obuf != NULL ? cod->obuf :
1052                     cod->buf + crp->crp_payload_start, cop->dst,
1053                     crp->crp_payload_length);
1054                 if (error) {
1055                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1056                         goto bail;
1057                 }
1058         }
1059
1060         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1061                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1062                     crp->crp_digest_start, cop->mac, cse->hashsize);
1063                 if (error) {
1064                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1065                         goto bail;
1066                 }
1067         }
1068
1069 bail:
1070         crypto_freereq(crp);
1071         cod_free(cod);
1072
1073         return (error);
1074 }
1075
1076 static int
1077 cryptodev_aead(
1078         struct csession *cse,
1079         struct crypt_aead *caead,
1080         struct ucred *active_cred,
1081         struct thread *td)
1082 {
1083         struct cryptop_data *cod = NULL;
1084         struct cryptop *crp = NULL;
1085         int error;
1086
1087         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1088                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1089                 return (E2BIG);
1090         }
1091
1092         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1093             (caead->len % cse->txform->blocksize) != 0) {
1094                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1095                 return (EINVAL);
1096         }
1097
1098         /*
1099          * The COP_F_CIPHER_FIRST flag predates explicit session
1100          * modes, but the only way it was used was for EtA so allow it
1101          * as long as it is consistent with EtA.
1102          */
1103         if (caead->flags & COP_F_CIPHER_FIRST) {
1104                 if (caead->op != COP_ENCRYPT) {
1105                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1106                         return (EINVAL);
1107                 }
1108         }
1109
1110         cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize, td);
1111
1112         crp = crypto_getreq(cse->cses, M_WAITOK);
1113
1114         if (cod->aad != NULL)
1115                 error = copyin(caead->aad, cod->aad, caead->aadlen);
1116         else
1117                 error = copyin(caead->aad, cod->buf, caead->aadlen);
1118         if (error) {
1119                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1120                 goto bail;
1121         }
1122         crp->crp_aad = cod->aad;
1123         crp->crp_aad_start = 0;
1124         crp->crp_aad_length = caead->aadlen;
1125
1126         if (cod->aad != NULL)
1127                 crp->crp_payload_start = 0;
1128         else
1129                 crp->crp_payload_start = caead->aadlen;
1130         error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1131             caead->len);
1132         if (error) {
1133                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1134                 goto bail;
1135         }
1136         crp->crp_payload_length = caead->len;
1137         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1138                 crp->crp_digest_start = crp->crp_payload_output_start +
1139                     caead->len;
1140         else
1141                 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1142
1143         switch (cse->mode) {
1144         case CSP_MODE_AEAD:
1145         case CSP_MODE_ETA:
1146                 switch (caead->op) {
1147                 case COP_ENCRYPT:
1148                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1149                             CRYPTO_OP_COMPUTE_DIGEST;
1150                         break;
1151                 case COP_DECRYPT:
1152                         crp->crp_op = CRYPTO_OP_DECRYPT |
1153                             CRYPTO_OP_VERIFY_DIGEST;
1154                         break;
1155                 default:
1156                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1157                         error = EINVAL;
1158                         goto bail;
1159                 }
1160                 break;
1161         default:
1162                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1163                 error = EINVAL;
1164                 goto bail;
1165         }
1166
1167         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1168         crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1169             cse->hashsize);
1170         if (cod->obuf != NULL)
1171                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1172                     cse->hashsize);
1173         crp->crp_callback = cryptodev_cb;
1174         crp->crp_opaque = cod;
1175
1176         if (caead->iv) {
1177                 /*
1178                  * Permit a 16-byte IV for AES-XTS, but only use the
1179                  * first 8 bytes as a block number.
1180                  */
1181                 if (cse->mode == CSP_MODE_ETA &&
1182                     caead->ivlen == AES_BLOCK_LEN &&
1183                     cse->ivsize == AES_XTS_IV_LEN)
1184                         caead->ivlen = AES_XTS_IV_LEN;
1185
1186                 if (caead->ivlen != cse->ivsize) {
1187                         error = EINVAL;
1188                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1189                         goto bail;
1190                 }
1191
1192                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1193                 if (error) {
1194                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1195                         goto bail;
1196                 }
1197                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1198         } else {
1199                 crp->crp_iv_start = crp->crp_payload_start;
1200                 crp->crp_payload_start += cse->ivsize;
1201                 crp->crp_payload_length -= cse->ivsize;
1202                 caead->dst += cse->ivsize;
1203         }
1204
1205         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1206                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1207                     cse->hashsize);
1208                 if (error) {
1209                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1210                         goto bail;
1211                 }
1212         }
1213 again:
1214         /*
1215          * Let the dispatch run unlocked, then, interlock against the
1216          * callback before checking if the operation completed and going
1217          * to sleep.  This insures drivers don't inherit our lock which
1218          * results in a lock order reversal between crypto_dispatch forced
1219          * entry and the crypto_done callback into us.
1220          */
1221         error = crypto_dispatch(crp);
1222         if (error != 0) {
1223                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1224                 goto bail;
1225         }
1226
1227         mtx_lock(&cse->lock);
1228         while (!cod->done)
1229                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1230         mtx_unlock(&cse->lock);
1231
1232         if (crp->crp_etype == EAGAIN) {
1233                 crp->crp_etype = 0;
1234                 crp->crp_flags &= ~CRYPTO_F_DONE;
1235                 cod->done = false;
1236                 goto again;
1237         }
1238
1239         if (crp->crp_etype != 0) {
1240                 error = crp->crp_etype;
1241                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1242                 goto bail;
1243         }
1244
1245         if (caead->dst != NULL) {
1246                 error = copyout(cod->obuf != NULL ? cod->obuf :
1247                     cod->buf + crp->crp_payload_start, caead->dst,
1248                     crp->crp_payload_length);
1249                 if (error) {
1250                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1251                         goto bail;
1252                 }
1253         }
1254
1255         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1256                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1257                     crp->crp_digest_start, caead->tag, cse->hashsize);
1258                 if (error) {
1259                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1260                         goto bail;
1261                 }
1262         }
1263
1264 bail:
1265         crypto_freereq(crp);
1266         cod_free(cod);
1267
1268         return (error);
1269 }
1270
1271 static int
1272 cryptodev_cb(struct cryptop *crp)
1273 {
1274         struct cryptop_data *cod = crp->crp_opaque;
1275
1276         /*
1277          * Lock to ensure the wakeup() is not missed by the loops
1278          * waiting on cod->done in cryptodev_op() and
1279          * cryptodev_aead().
1280          */
1281         mtx_lock(&cod->cse->lock);
1282         cod->done = true;
1283         mtx_unlock(&cod->cse->lock);
1284         wakeup(cod);
1285         return (0);
1286 }
1287
1288 static void
1289 cryptodevkey_cb(struct cryptkop *krp)
1290 {
1291
1292         wakeup_one(krp);
1293 }
1294
1295 static int
1296 cryptodev_key(struct crypt_kop *kop)
1297 {
1298         struct cryptkop *krp = NULL;
1299         int error = EINVAL;
1300         int in, out, size, i;
1301
1302         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1303                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1304                 return (EFBIG);
1305         }
1306
1307         in = kop->crk_iparams;
1308         out = kop->crk_oparams;
1309         switch (kop->crk_op) {
1310         case CRK_MOD_EXP:
1311                 if (in == 3 && out == 1)
1312                         break;
1313                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1314                 return (EINVAL);
1315         case CRK_MOD_EXP_CRT:
1316                 if (in == 6 && out == 1)
1317                         break;
1318                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1319                 return (EINVAL);
1320         case CRK_DSA_SIGN:
1321                 if (in == 5 && out == 2)
1322                         break;
1323                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1324                 return (EINVAL);
1325         case CRK_DSA_VERIFY:
1326                 if (in == 7 && out == 0)
1327                         break;
1328                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1329                 return (EINVAL);
1330         case CRK_DH_COMPUTE_KEY:
1331                 if (in == 3 && out == 1)
1332                         break;
1333                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1334                 return (EINVAL);
1335         default:
1336                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1337                 return (EINVAL);
1338         }
1339
1340         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1341         if (!krp) {
1342                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1343                 return (ENOMEM);
1344         }
1345         krp->krp_op = kop->crk_op;
1346         krp->krp_status = kop->crk_status;
1347         krp->krp_iparams = kop->crk_iparams;
1348         krp->krp_oparams = kop->crk_oparams;
1349         krp->krp_crid = kop->crk_crid;
1350         krp->krp_status = 0;
1351         krp->krp_callback = cryptodevkey_cb;
1352
1353         for (i = 0; i < CRK_MAXPARAM; i++) {
1354                 if (kop->crk_param[i].crp_nbits > 65536) {
1355                         /* Limit is the same as in OpenBSD */
1356                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1357                         goto fail;
1358                 }
1359                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1360         }
1361         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1362                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1363                 if (size == 0)
1364                         continue;
1365                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1366                 if (i >= krp->krp_iparams)
1367                         continue;
1368                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1369                 if (error) {
1370                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1371                         goto fail;
1372                 }
1373         }
1374
1375         error = crypto_kdispatch(krp);
1376         if (error) {
1377                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1378                 goto fail;
1379         }
1380         error = tsleep(krp, PSOCK, "crydev", 0);
1381         if (error) {
1382                 /* XXX can this happen?  if so, how do we recover? */
1383                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1384                 goto fail;
1385         }
1386
1387         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1388         if (krp->krp_status != 0) {
1389                 error = krp->krp_status;
1390                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1391                 goto fail;
1392         }
1393
1394         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1395                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1396                 if (size == 0)
1397                         continue;
1398                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1399                 if (error) {
1400                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1401                         goto fail;
1402                 }
1403         }
1404
1405 fail:
1406         if (krp) {
1407                 kop->crk_status = krp->krp_status;
1408                 for (i = 0; i < CRK_MAXPARAM; i++) {
1409                         if (krp->krp_param[i].crp_p)
1410                                 free(krp->krp_param[i].crp_p, M_XDATA);
1411                 }
1412                 free(krp, M_XDATA);
1413         }
1414         return (error);
1415 }
1416
1417 static int
1418 cryptodev_find(struct crypt_find_op *find)
1419 {
1420         device_t dev;
1421         size_t fnlen = sizeof find->name;
1422
1423         if (find->crid != -1) {
1424                 dev = crypto_find_device_byhid(find->crid);
1425                 if (dev == NULL)
1426                         return (ENOENT);
1427                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1428                 find->name[fnlen - 1] = '\x0';
1429         } else {
1430                 find->name[fnlen - 1] = '\x0';
1431                 find->crid = crypto_find_driver(find->name);
1432                 if (find->crid == -1)
1433                         return (ENOENT);
1434         }
1435         return (0);
1436 }
1437
1438 /* ARGSUSED */
1439 static int
1440 cryptof_stat(
1441         struct file *fp,
1442         struct stat *sb,
1443         struct ucred *active_cred,
1444         struct thread *td)
1445 {
1446
1447         return (EOPNOTSUPP);
1448 }
1449
1450 /* ARGSUSED */
1451 static int
1452 cryptof_close(struct file *fp, struct thread *td)
1453 {
1454         struct fcrypt *fcr = fp->f_data;
1455         struct csession *cse;
1456
1457         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1458                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1459                 KASSERT(cse->refs == 1,
1460                     ("%s: crypto session %p with %d refs", __func__, cse,
1461                     cse->refs));
1462                 csefree(cse);
1463         }
1464         free(fcr, M_XDATA);
1465         fp->f_data = NULL;
1466         return 0;
1467 }
1468
1469 static int
1470 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1471 {
1472
1473         kif->kf_type = KF_TYPE_CRYPTO;
1474         return (0);
1475 }
1476
1477 static struct csession *
1478 csefind(struct fcrypt *fcr, u_int ses)
1479 {
1480         struct csession *cse;
1481
1482         mtx_lock(&fcr->lock);
1483         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1484                 if (cse->ses == ses) {
1485                         refcount_acquire(&cse->refs);
1486                         mtx_unlock(&fcr->lock);
1487                         return (cse);
1488                 }
1489         }
1490         mtx_unlock(&fcr->lock);
1491         return (NULL);
1492 }
1493
1494 static bool
1495 csedelete(struct fcrypt *fcr, u_int ses)
1496 {
1497         struct csession *cse;
1498
1499         mtx_lock(&fcr->lock);
1500         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1501                 if (cse->ses == ses) {
1502                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1503                         mtx_unlock(&fcr->lock);
1504                         csefree(cse);
1505                         return (true);
1506                 }
1507         }
1508         mtx_unlock(&fcr->lock);
1509         return (false);
1510 }
1511
1512 struct csession *
1513 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1514     struct crypto_session_params *csp, struct enc_xform *txform,
1515     void *key, struct auth_hash *thash, void *mackey)
1516 {
1517         struct csession *cse;
1518
1519         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1520         if (cse == NULL)
1521                 return NULL;
1522         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1523         refcount_init(&cse->refs, 1);
1524         cse->key = key;
1525         cse->mackey = mackey;
1526         cse->mode = csp->csp_mode;
1527         cse->cses = cses;
1528         cse->txform = txform;
1529         if (thash != NULL)
1530                 cse->hashsize = thash->hashsize;
1531         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1532                 cse->hashsize = AES_GMAC_HASH_LEN;
1533         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1534                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1535         cse->ivsize = csp->csp_ivlen;
1536         mtx_lock(&fcr->lock);
1537         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1538         cse->ses = fcr->sesn++;
1539         mtx_unlock(&fcr->lock);
1540         return (cse);
1541 }
1542
1543 static void
1544 csefree(struct csession *cse)
1545 {
1546
1547         if (!refcount_release(&cse->refs))
1548                 return;
1549         crypto_freesession(cse->cses);
1550         mtx_destroy(&cse->lock);
1551         if (cse->key)
1552                 free(cse->key, M_XDATA);
1553         if (cse->mackey)
1554                 free(cse->mackey, M_XDATA);
1555         free(cse, M_XDATA);
1556 }
1557
1558 static int
1559 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1560 {
1561         struct file *f;
1562         struct fcrypt *fcr;
1563         int fd, error;
1564
1565         switch (cmd) {
1566         case CRIOGET:
1567                 error = falloc_noinstall(td, &f);
1568                 if (error)
1569                         break;
1570
1571                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1572                 TAILQ_INIT(&fcr->csessions);
1573                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1574
1575                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1576                 error = finstall(td, f, &fd, 0, NULL);
1577                 if (error) {
1578                         mtx_destroy(&fcr->lock);
1579                         free(fcr, M_XDATA);
1580                 } else
1581                         *(uint32_t *)data = fd;
1582                 fdrop(f, td);
1583                 break;
1584         case CRIOFINDDEV:
1585                 error = cryptodev_find((struct crypt_find_op *)data);
1586                 break;
1587         case CRIOASYMFEAT:
1588                 error = crypto_getfeat((int *)data);
1589                 break;
1590         default:
1591                 error = EINVAL;
1592                 break;
1593         }
1594         return (error);
1595 }
1596
1597 static struct cdevsw crypto_cdevsw = {
1598         .d_version =    D_VERSION,
1599         .d_ioctl =      cryptoioctl,
1600         .d_name =       "crypto",
1601 };
1602 static struct cdev *crypto_dev;
1603
1604 /*
1605  * Initialization code, both for static and dynamic loading.
1606  */
1607 static int
1608 cryptodev_modevent(module_t mod, int type, void *unused)
1609 {
1610         switch (type) {
1611         case MOD_LOAD:
1612                 if (bootverbose)
1613                         printf("crypto: <crypto device>\n");
1614                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1615                                       UID_ROOT, GID_WHEEL, 0666,
1616                                       "crypto");
1617                 return 0;
1618         case MOD_UNLOAD:
1619                 /*XXX disallow if active sessions */
1620                 destroy_dev(crypto_dev);
1621                 return 0;
1622         }
1623         return EINVAL;
1624 }
1625
1626 static moduledata_t cryptodev_mod = {
1627         "cryptodev",
1628         cryptodev_modevent,
1629         0
1630 };
1631 MODULE_VERSION(cryptodev, 1);
1632 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1633 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1634 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);