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 crypt_aead32 {
 107         u_int32_t       ses;
 108         u_int16_t       op;
 109         u_int16_t       flags;
 110         u_int           len;
 111         u_int           aadlen;
 112         u_int           ivlen;
 113         u_int32_t       src;
 114         u_int32_t       dst;
 115         u_int32_t       aad;
 116         u_int32_t       tag;
 117         u_int32_t       iv;
 118 };
 119
 120 struct crparam32 {
 121         u_int32_t       crp_p;
 122         u_int           crp_nbits;
 123 };
 124
 125 struct crypt_kop32 {
 126         u_int           crk_op;
 127         u_int           crk_status;
 128         u_short         crk_iparams;
 129         u_short         crk_oparams;
 130         u_int           crk_crid;
 131         struct crparam32        crk_param[CRK_MAXPARAM];
 132 };
 133
 134 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
 135 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
 136 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
 137 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
 138 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
 139 #define CIOCCRYPTAEAD32 _IOWR('c', 109, struct crypt_aead32)
 140
 141 static void
 142 session_op_from_32(const struct session_op32 *from, struct session2_op *to)
 143 {
 144
 145         memset(to, 0, sizeof(*to));
 146         CP(*from, *to, cipher);
 147         CP(*from, *to, mac);
 148         CP(*from, *to, keylen);
 149         PTRIN_CP(*from, *to, key);
 150         CP(*from, *to, mackeylen);
 151         PTRIN_CP(*from, *to, mackey);
 152         CP(*from, *to, ses);
 153         to->crid = CRYPTOCAP_F_HARDWARE;
 154 }
 155
 156 static void
 157 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
 158 {
 159
 160         session_op_from_32((const struct session_op32 *)from, to);
 161         CP(*from, *to, crid);
 162 }
 163
 164 static void
 165 session_op_to_32(const struct session2_op *from, struct session_op32 *to)
 166 {
 167
 168         CP(*from, *to, cipher);
 169         CP(*from, *to, mac);
 170         CP(*from, *to, keylen);
 171         PTROUT_CP(*from, *to, key);
 172         CP(*from, *to, mackeylen);
 173         PTROUT_CP(*from, *to, mackey);
 174         CP(*from, *to, ses);
 175 }
 176
 177 static void
 178 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
 179 {
 180
 181         session_op_to_32(from, (struct session_op32 *)to);
 182         CP(*from, *to, crid);
 183 }
 184
 185 static void
 186 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
 187 {
 188
 189         CP(*from, *to, ses);
 190         CP(*from, *to, op);
 191         CP(*from, *to, flags);
 192         CP(*from, *to, len);
 193         PTRIN_CP(*from, *to, src);
 194         PTRIN_CP(*from, *to, dst);
 195         PTRIN_CP(*from, *to, mac);
 196         PTRIN_CP(*from, *to, iv);
 197 }
 198
 199 static void
 200 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
 201 {
 202
 203         CP(*from, *to, ses);
 204         CP(*from, *to, op);
 205         CP(*from, *to, flags);
 206         CP(*from, *to, len);
 207         PTROUT_CP(*from, *to, src);
 208         PTROUT_CP(*from, *to, dst);
 209         PTROUT_CP(*from, *to, mac);
 210         PTROUT_CP(*from, *to, iv);
 211 }
 212
 213 static void
 214 crypt_aead_from_32(const struct crypt_aead32 *from, struct crypt_aead *to)
 215 {
 216
 217         CP(*from, *to, ses);
 218         CP(*from, *to, op);
 219         CP(*from, *to, flags);
 220         CP(*from, *to, len);
 221         CP(*from, *to, aadlen);
 222         CP(*from, *to, ivlen);
 223         PTRIN_CP(*from, *to, src);
 224         PTRIN_CP(*from, *to, dst);
 225         PTRIN_CP(*from, *to, aad);
 226         PTRIN_CP(*from, *to, tag);
 227         PTRIN_CP(*from, *to, iv);
 228 }
 229
 230 static void
 231 crypt_aead_to_32(const struct crypt_aead *from, struct crypt_aead32 *to)
 232 {
 233
 234         CP(*from, *to, ses);
 235         CP(*from, *to, op);
 236         CP(*from, *to, flags);
 237         CP(*from, *to, len);
 238         CP(*from, *to, aadlen);
 239         CP(*from, *to, ivlen);
 240         PTROUT_CP(*from, *to, src);
 241         PTROUT_CP(*from, *to, dst);
 242         PTROUT_CP(*from, *to, aad);
 243         PTROUT_CP(*from, *to, tag);
 244         PTROUT_CP(*from, *to, iv);
 245 }
 246
 247 static void
 248 crparam_from_32(const struct crparam32 *from, struct crparam *to)
 249 {
 250
 251         PTRIN_CP(*from, *to, crp_p);
 252         CP(*from, *to, crp_nbits);
 253 }
 254
 255 static void
 256 crparam_to_32(const struct crparam *from, struct crparam32 *to)
 257 {
 258
 259         PTROUT_CP(*from, *to, crp_p);
 260         CP(*from, *to, crp_nbits);
 261 }
 262
 263 static void
 264 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
 265 {
 266         int i;
 267
 268         CP(*from, *to, crk_op);
 269         CP(*from, *to, crk_status);
 270         CP(*from, *to, crk_iparams);
 271         CP(*from, *to, crk_oparams);
 272         CP(*from, *to, crk_crid);
 273         for (i = 0; i < CRK_MAXPARAM; i++)
 274                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
 275 }
 276
 277 static void
 278 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
 279 {
 280         int i;
 281
 282         CP(*from, *to, crk_op);
 283         CP(*from, *to, crk_status);
 284         CP(*from, *to, crk_iparams);
 285         CP(*from, *to, crk_oparams);
 286         CP(*from, *to, crk_crid);
 287         for (i = 0; i < CRK_MAXPARAM; i++)
 288                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
 289 }
 290 #endif
 291
 292 static void
 293 session2_op_from_op(const struct session_op *from, struct session2_op *to)
 294 {
 295
 296         memset(to, 0, sizeof(*to));
 297         memcpy(to, from, sizeof(*from));
 298         to->crid = CRYPTOCAP_F_HARDWARE;
 299 }
 300
 301 static void
 302 session2_op_to_op(const struct session2_op *from, struct session_op *to)
 303 {
 304
 305         memcpy(to, from, sizeof(*to));
 306 }
 307
 308 struct csession {
 309         TAILQ_ENTRY(csession) next;
 310         crypto_session_t cses;
 311         volatile u_int  refs;
 312         u_int32_t       ses;
 313         struct mtx      lock;           /* for op submission */
 314
 315         struct enc_xform *txform;
 316         int             hashsize;
 317         int             ivsize;
 318         int             mode;
 319
 320         void            *key;
 321         void            *mackey;
 322 };
 323
 324 struct cryptop_data {
 325         struct csession *cse;
 326
 327         char            *buf;
 328         char            *obuf;
 329         char            *aad;
 330         bool            done;
 331 };
 332
 333 struct fcrypt {
 334         TAILQ_HEAD(csessionlist, csession) csessions;
 335         int             sesn;
 336         struct mtx      lock;
 337 };
 338
 339 static bool use_outputbuffers;
 340 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
 341     &use_outputbuffers, 0,
 342     "Use separate output buffers for /dev/crypto requests.");
 343
 344 static bool use_separate_aad;
 345 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
 346     &use_separate_aad, 0,
 347     "Use separate AAD buffer for /dev/crypto requests.");
 348
 349 static  int cryptof_ioctl(struct file *, u_long, void *,
 350                     struct ucred *, struct thread *);
 351 static  int cryptof_stat(struct file *, struct stat *,
 352                     struct ucred *, struct thread *);
 353 static  int cryptof_close(struct file *, struct thread *);
 354 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 355                     struct filedesc *);
 356
 357 static struct fileops cryptofops = {
 358     .fo_read = invfo_rdwr,
 359     .fo_write = invfo_rdwr,
 360     .fo_truncate = invfo_truncate,
 361     .fo_ioctl = cryptof_ioctl,
 362     .fo_poll = invfo_poll,
 363     .fo_kqfilter = invfo_kqfilter,
 364     .fo_stat = cryptof_stat,
 365     .fo_close = cryptof_close,
 366     .fo_chmod = invfo_chmod,
 367     .fo_chown = invfo_chown,
 368     .fo_sendfile = invfo_sendfile,
 369     .fo_fill_kinfo = cryptof_fill_kinfo,
 370 };
 371
 372 static struct csession *csefind(struct fcrypt *, u_int);
 373 static bool csedelete(struct fcrypt *, u_int);
 374 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 375     struct crypto_session_params *, struct enc_xform *, void *,
 376     struct auth_hash *, void *);
 377 static void csefree(struct csession *);
 378
 379 static  int cryptodev_op(struct csession *, struct crypt_op *,
 380                         struct ucred *, struct thread *td);
 381 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 382                         struct ucred *, struct thread *);
 383 static  int cryptodev_key(struct crypt_kop *);
 384 static  int cryptodev_find(struct crypt_find_op *);
 385
 386 /*
 387  * Check a crypto identifier to see if it requested
 388  * a software device/driver.  This can be done either
 389  * by device name/class or through search constraints.
 390  */
 391 static int
 392 checkforsoftware(int *cridp)
 393 {
 394         int crid;
 395
 396         crid = *cridp;
 397
 398         if (!crypto_devallowsoft) {
 399                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 400                         if (crid & CRYPTOCAP_F_HARDWARE) {
 401                                 *cridp = CRYPTOCAP_F_HARDWARE;
 402                                 return 0;
 403                         }
 404                         return EINVAL;
 405                 }
 406                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 407                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 408                         return EINVAL;
 409         }
 410         return 0;
 411 }
 412
 413 /* ARGSUSED */
 414 static int
 415 cryptof_ioctl(
 416         struct file *fp,
 417         u_long cmd,
 418         void *data,
 419         struct ucred *active_cred,
 420         struct thread *td)
 421 {
 422         struct crypto_session_params csp;
 423         struct fcrypt *fcr = fp->f_data;
 424         struct csession *cse;
 425         struct session2_op *sop;
 426         struct crypt_op *cop;
 427         struct crypt_aead *caead;
 428         struct enc_xform *txform = NULL;
 429         struct auth_hash *thash = NULL;
 430         void *key = NULL;
 431         void *mackey = NULL;
 432         struct crypt_kop *kop;
 433         crypto_session_t cses;
 434         u_int32_t ses;
 435         int error = 0, crid;
 436         union {
 437                 struct session2_op sopc;
 438 #ifdef COMPAT_FREEBSD32
 439                 struct crypt_op copc;
 440                 struct crypt_aead aeadc;
 441                 struct crypt_kop kopc;
 442 #endif
 443         } thunk;
 444 #ifdef COMPAT_FREEBSD32
 445         u_long cmd32;
 446         void *data32;
 447
 448         cmd32 = 0;
 449         data32 = NULL;
 450         switch (cmd) {
 451         case CIOCGSESSION32:
 452                 cmd32 = cmd;
 453                 data32 = data;
 454                 cmd = CIOCGSESSION;
 455                 data = &thunk.sopc;
 456                 session_op_from_32((struct session_op32 *)data32, &thunk.sopc);
 457                 break;
 458         case CIOCGSESSION232:
 459                 cmd32 = cmd;
 460                 data32 = data;
 461                 cmd = CIOCGSESSION2;
 462                 data = &thunk.sopc;
 463                 session2_op_from_32((struct session2_op32 *)data32,
 464                     &thunk.sopc);
 465                 break;
 466         case CIOCCRYPT32:
 467                 cmd32 = cmd;
 468                 data32 = data;
 469                 cmd = CIOCCRYPT;
 470                 data = &thunk.copc;
 471                 crypt_op_from_32((struct crypt_op32 *)data32, &thunk.copc);
 472                 break;
 473         case CIOCCRYPTAEAD32:
 474                 cmd32 = cmd;
 475                 data32 = data;
 476                 cmd = CIOCCRYPTAEAD;
 477                 data = &thunk.aeadc;
 478                 crypt_aead_from_32((struct crypt_aead32 *)data32, &thunk.aeadc);
 479                 break;
 480         case CIOCKEY32:
 481         case CIOCKEY232:
 482                 cmd32 = cmd;
 483                 data32 = data;
 484                 if (cmd == CIOCKEY32)
 485                         cmd = CIOCKEY;
 486                 else
 487                         cmd = CIOCKEY2;
 488                 data = &thunk.kopc;
 489                 crypt_kop_from_32((struct crypt_kop32 *)data32, &thunk.kopc);
 490                 break;
 491         }
 492 #endif
 493
 494         switch (cmd) {
 495         case CIOCGSESSION:
 496         case CIOCGSESSION2:
 497                 if (cmd == CIOCGSESSION) {
 498                         session2_op_from_op(data, &thunk.sopc);
 499                         sop = &thunk.sopc;
 500                 } else
 501                         sop = (struct session2_op *)data;
 502
 503                 switch (sop->cipher) {
 504                 case 0:
 505                         break;
 506                 case CRYPTO_AES_CBC:
 507                         txform = &enc_xform_rijndael128;
 508                         break;
 509                 case CRYPTO_AES_XTS:
 510                         txform = &enc_xform_aes_xts;
 511                         break;
 512                 case CRYPTO_NULL_CBC:
 513                         txform = &enc_xform_null;
 514                         break;
 515                 case CRYPTO_CAMELLIA_CBC:
 516                         txform = &enc_xform_camellia;
 517                         break;
 518                 case CRYPTO_AES_ICM:
 519                         txform = &enc_xform_aes_icm;
 520                         break;
 521                 case CRYPTO_AES_NIST_GCM_16:
 522                         txform = &enc_xform_aes_nist_gcm;
 523                         break;
 524                 case CRYPTO_CHACHA20:
 525                         txform = &enc_xform_chacha20;
 526                         break;
 527                 case CRYPTO_AES_CCM_16:
 528                         txform = &enc_xform_ccm;
 529                         break;
 530
 531                 default:
 532                         CRYPTDEB("invalid cipher");
 533                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 534                         return (EINVAL);
 535                 }
 536
 537                 switch (sop->mac) {
 538                 case 0:
 539                         break;
 540                 case CRYPTO_POLY1305:
 541                         thash = &auth_hash_poly1305;
 542                         break;
 543                 case CRYPTO_SHA1_HMAC:
 544                         thash = &auth_hash_hmac_sha1;
 545                         break;
 546                 case CRYPTO_SHA2_224_HMAC:
 547                         thash = &auth_hash_hmac_sha2_224;
 548                         break;
 549                 case CRYPTO_SHA2_256_HMAC:
 550                         thash = &auth_hash_hmac_sha2_256;
 551                         break;
 552                 case CRYPTO_SHA2_384_HMAC:
 553                         thash = &auth_hash_hmac_sha2_384;
 554                         break;
 555                 case CRYPTO_SHA2_512_HMAC:
 556                         thash = &auth_hash_hmac_sha2_512;
 557                         break;
 558                 case CRYPTO_RIPEMD160_HMAC:
 559                         thash = &auth_hash_hmac_ripemd_160;
 560                         break;
 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                         /* Should always be paired with GCM. */
 566                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 567                                 CRYPTDEB("GMAC without GCM");
 568                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 569                                     __LINE__);
 570                                 return (EINVAL);
 571                         }
 572                         break;
 573 #endif
 574                 case CRYPTO_AES_NIST_GMAC:
 575                         switch (sop->mackeylen * 8) {
 576                         case 128:
 577                                 thash = &auth_hash_nist_gmac_aes_128;
 578                                 break;
 579                         case 192:
 580                                 thash = &auth_hash_nist_gmac_aes_192;
 581                                 break;
 582                         case 256:
 583                                 thash = &auth_hash_nist_gmac_aes_256;
 584                                 break;
 585                         default:
 586                                 CRYPTDEB("invalid GMAC key length");
 587                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 588                                     __LINE__);
 589                                 return (EINVAL);
 590                         }
 591                         break;
 592                 case CRYPTO_AES_CCM_CBC_MAC:
 593                         switch (sop->mackeylen) {
 594                         case 16:
 595                                 thash = &auth_hash_ccm_cbc_mac_128;
 596                                 break;
 597                         case 24:
 598                                 thash = &auth_hash_ccm_cbc_mac_192;
 599                                 break;
 600                         case 32:
 601                                 thash = &auth_hash_ccm_cbc_mac_256;
 602                                 break;
 603                         default:
 604                                 CRYPTDEB("Invalid CBC MAC key size %d",
 605                                     sop->keylen);
 606                                 SDT_PROBE1(opencrypto, dev, ioctl,
 607                                     error, __LINE__);
 608                                 return (EINVAL);
 609                         }
 610                         break;
 611                 case CRYPTO_SHA1:
 612                         thash = &auth_hash_sha1;
 613                         break;
 614                 case CRYPTO_SHA2_224:
 615                         thash = &auth_hash_sha2_224;
 616                         break;
 617                 case CRYPTO_SHA2_256:
 618                         thash = &auth_hash_sha2_256;
 619                         break;
 620                 case CRYPTO_SHA2_384:
 621                         thash = &auth_hash_sha2_384;
 622                         break;
 623                 case CRYPTO_SHA2_512:
 624                         thash = &auth_hash_sha2_512;
 625                         break;
 626
 627                 case CRYPTO_NULL_HMAC:
 628                         thash = &auth_hash_null;
 629                         break;
 630
 631                 case CRYPTO_BLAKE2B:
 632                         thash = &auth_hash_blake2b;
 633                         break;
 634                 case CRYPTO_BLAKE2S:
 635                         thash = &auth_hash_blake2s;
 636                         break;
 637
 638                 default:
 639                         CRYPTDEB("invalid mac");
 640                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 641                         return (EINVAL);
 642                 }
 643
 644                 if (txform == NULL && thash == NULL) {
 645                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 646                         return (EINVAL);
 647                 }
 648
 649                 memset(&csp, 0, sizeof(csp));
 650                 if (use_outputbuffers)
 651                         csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 652
 653                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 654                         switch (sop->mac) {
 655 #ifdef COMPAT_FREEBSD12
 656                         case CRYPTO_AES_128_NIST_GMAC:
 657                         case CRYPTO_AES_192_NIST_GMAC:
 658                         case CRYPTO_AES_256_NIST_GMAC:
 659                                 if (sop->keylen != sop->mackeylen) {
 660                                         SDT_PROBE1(opencrypto, dev, ioctl,
 661                                             error, __LINE__);
 662                                         return (EINVAL);
 663                                 }
 664                                 break;
 665 #endif
 666                         case 0:
 667                                 break;
 668                         default:
 669                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 670                                     __LINE__);
 671                                 return (EINVAL);
 672                         }
 673                         csp.csp_mode = CSP_MODE_AEAD;
 674                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 675                         switch (sop->mac) {
 676 #ifdef COMPAT_FREEBSD12
 677                         case CRYPTO_AES_CCM_CBC_MAC:
 678                                 if (sop->keylen != sop->mackeylen) {
 679                                         SDT_PROBE1(opencrypto, dev, ioctl,
 680                                             error, __LINE__);
 681                                         return (EINVAL);
 682                                 }
 683                                 thash = NULL;
 684                                 break;
 685 #endif
 686                         case 0:
 687                                 break;
 688                         default:
 689                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 690                                     __LINE__);
 691                                 return (EINVAL);
 692                         }
 693                         csp.csp_mode = CSP_MODE_AEAD;
 694                 } else if (txform && thash)
 695                         csp.csp_mode = CSP_MODE_ETA;
 696                 else if (txform)
 697                         csp.csp_mode = CSP_MODE_CIPHER;
 698                 else
 699                         csp.csp_mode = CSP_MODE_DIGEST;
 700
 701                 switch (csp.csp_mode) {
 702                 case CSP_MODE_AEAD:
 703                 case CSP_MODE_ETA:
 704                         if (use_separate_aad)
 705                                 csp.csp_flags |= CSP_F_SEPARATE_AAD;
 706                         break;
 707                 }
 708
 709                 if (txform) {
 710                         csp.csp_cipher_alg = txform->type;
 711                         csp.csp_cipher_klen = sop->keylen;
 712                         if (sop->keylen > txform->maxkey ||
 713                             sop->keylen < txform->minkey) {
 714                                 CRYPTDEB("invalid cipher parameters");
 715                                 error = EINVAL;
 716                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 717                                     __LINE__);
 718                                 goto bail;
 719                         }
 720
 721                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 722                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 723                         if (error) {
 724                                 CRYPTDEB("invalid key");
 725                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 726                                     __LINE__);
 727                                 goto bail;
 728                         }
 729                         csp.csp_cipher_key = key;
 730                         csp.csp_ivlen = txform->ivsize;
 731                 }
 732
 733                 if (thash) {
 734                         csp.csp_auth_alg = thash->type;
 735                         csp.csp_auth_klen = sop->mackeylen;
 736                         if (sop->mackeylen > thash->keysize ||
 737                             sop->mackeylen < 0) {
 738                                 CRYPTDEB("invalid mac key length");
 739                                 error = EINVAL;
 740                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 741                                     __LINE__);
 742                                 goto bail;
 743                         }
 744
 745                         if (csp.csp_auth_klen) {
 746                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 747                                     M_WAITOK);
 748                                 error = copyin(sop->mackey, mackey,
 749                                     csp.csp_auth_klen);
 750                                 if (error) {
 751                                         CRYPTDEB("invalid mac key");
 752                                         SDT_PROBE1(opencrypto, dev, ioctl,
 753                                             error, __LINE__);
 754                                         goto bail;
 755                                 }
 756                                 csp.csp_auth_key = mackey;
 757                         }
 758
 759                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 760                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 761                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 762                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 763                 }
 764
 765                 crid = sop->crid;
 766                 error = checkforsoftware(&crid);
 767                 if (error) {
 768                         CRYPTDEB("checkforsoftware");
 769                         SDT_PROBE1(opencrypto, dev, ioctl, error,
 770                             __LINE__);
 771                         goto bail;
 772                 }
 773                 error = crypto_newsession(&cses, &csp, crid);
 774                 if (error) {
 775                         CRYPTDEB("crypto_newsession");
 776                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 777                         goto bail;
 778                 }
 779
 780                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 781
 782                 if (cse == NULL) {
 783                         crypto_freesession(cses);
 784                         error = EINVAL;
 785                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 786                         CRYPTDEB("csecreate");
 787                         goto bail;
 788                 }
 789                 sop->ses = cse->ses;
 790
 791                 /* return hardware/driver id */
 792                 sop->crid = crypto_ses2hid(cse->cses);
 793 bail:
 794                 if (error) {
 795                         free(key, M_XDATA);
 796                         free(mackey, M_XDATA);
 797                 }
 798
 799                 if (cmd == CIOCGSESSION && error == 0)
 800                         session2_op_to_op(sop, data);
 801                 break;
 802         case CIOCFSESSION:
 803                 ses = *(u_int32_t *)data;
 804                 if (!csedelete(fcr, ses)) {
 805                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 806                         return (EINVAL);
 807                 }
 808                 break;
 809         case CIOCCRYPT:
 810                 cop = (struct crypt_op *)data;
 811                 cse = csefind(fcr, cop->ses);
 812                 if (cse == NULL) {
 813                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 814                         return (EINVAL);
 815                 }
 816                 error = cryptodev_op(cse, cop, active_cred, td);
 817                 csefree(cse);
 818                 break;
 819         case CIOCKEY:
 820         case CIOCKEY2:
 821                 if (!crypto_userasymcrypto) {
 822                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 823                         return (EPERM);         /* XXX compat? */
 824                 }
 825                 kop = (struct crypt_kop *)data;
 826                 if (cmd == CIOCKEY) {
 827                         /* NB: crypto core enforces s/w driver use */
 828                         kop->crk_crid =
 829                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 830                 }
 831                 mtx_lock(&Giant);
 832                 error = cryptodev_key(kop);
 833                 mtx_unlock(&Giant);
 834                 break;
 835         case CIOCASYMFEAT:
 836                 if (!crypto_userasymcrypto) {
 837                         /*
 838                          * NB: if user asym crypto operations are
 839                          * not permitted return "no algorithms"
 840                          * so well-behaved applications will just
 841                          * fallback to doing them in software.
 842                          */
 843                         *(int *)data = 0;
 844                 } else {
 845                         error = crypto_getfeat((int *)data);
 846                         if (error)
 847                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 848                                     __LINE__);
 849                 }
 850                 break;
 851         case CIOCFINDDEV:
 852                 error = cryptodev_find((struct crypt_find_op *)data);
 853                 break;
 854         case CIOCCRYPTAEAD:
 855                 caead = (struct crypt_aead *)data;
 856                 cse = csefind(fcr, caead->ses);
 857                 if (cse == NULL) {
 858                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 859                         return (EINVAL);
 860                 }
 861                 error = cryptodev_aead(cse, caead, active_cred, td);
 862                 csefree(cse);
 863                 break;
 864         default:
 865                 error = EINVAL;
 866                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 867                 break;
 868         }
 869
 870 #ifdef COMPAT_FREEBSD32
 871         switch (cmd32) {
 872         case CIOCGSESSION32:
 873                 if (error == 0)
 874                         session_op_to_32(data, data32);
 875                 break;
 876         case CIOCGSESSION232:
 877                 if (error == 0)
 878                         session2_op_to_32(data, data32);
 879                 break;
 880         case CIOCCRYPT32:
 881                 if (error == 0)
 882                         crypt_op_to_32(data, data32);
 883                 break;
 884         case CIOCCRYPTAEAD32:
 885                 if (error == 0)
 886                         crypt_aead_to_32(data, data32);
 887                 break;
 888         case CIOCKEY32:
 889         case CIOCKEY232:
 890                 crypt_kop_to_32(data, data32);
 891                 break;
 892         }
 893 #endif
 894         return (error);
 895 }
 896
 897 static int cryptodev_cb(struct cryptop *);
 898
 899 static struct cryptop_data *
 900 cod_alloc(struct csession *cse, size_t aad_len, size_t len, struct thread *td)
 901 {
 902         struct cryptop_data *cod;
 903
 904         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 905
 906         cod->cse = cse;
 907         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
 908                 if (aad_len != 0)
 909                         cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
 910                 cod->buf = malloc(len, M_XDATA, M_WAITOK);
 911         } else
 912                 cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
 913         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 914                 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
 915         return (cod);
 916 }
 917
 918 static void
 919 cod_free(struct cryptop_data *cod)
 920 {
 921
 922         free(cod->aad, M_XDATA);
 923         free(cod->obuf, M_XDATA);
 924         free(cod->buf, M_XDATA);
 925         free(cod, M_XDATA);
 926 }
 927
 928 static int
 929 cryptodev_op(
 930         struct csession *cse,
 931         struct crypt_op *cop,
 932         struct ucred *active_cred,
 933         struct thread *td)
 934 {
 935         struct cryptop_data *cod = NULL;
 936         struct cryptop *crp = NULL;
 937         int error;
 938
 939         if (cop->len > 256*1024-4) {
 940                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 941                 return (E2BIG);
 942         }
 943
 944         if (cse->txform) {
 945                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 946                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 947                         return (EINVAL);
 948                 }
 949         }
 950
 951         if (cop->mac && cse->hashsize == 0) {
 952                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 953                 return (EINVAL);
 954         }
 955
 956         /*
 957          * The COP_F_CIPHER_FIRST flag predates explicit session
 958          * modes, but the only way it was used was for EtA so allow it
 959          * as long as it is consistent with EtA.
 960          */
 961         if (cop->flags & COP_F_CIPHER_FIRST) {
 962                 if (cop->op != COP_ENCRYPT) {
 963                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 964                         return (EINVAL);
 965                 }
 966         }
 967
 968         cod = cod_alloc(cse, 0, cop->len + cse->hashsize, td);
 969
 970         crp = crypto_getreq(cse->cses, M_WAITOK);
 971
 972         error = copyin(cop->src, cod->buf, cop->len);
 973         if (error) {
 974                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 975                 goto bail;
 976         }
 977         crp->crp_payload_start = 0;
 978         crp->crp_payload_length = cop->len;
 979         if (cse->hashsize)
 980                 crp->crp_digest_start = cop->len;
 981
 982         switch (cse->mode) {
 983         case CSP_MODE_COMPRESS:
 984                 switch (cop->op) {
 985                 case COP_ENCRYPT:
 986                         crp->crp_op = CRYPTO_OP_COMPRESS;
 987                         break;
 988                 case COP_DECRYPT:
 989                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 990                         break;
 991                 default:
 992                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 993                         error = EINVAL;
 994                         goto bail;
 995                 }
 996                 break;
 997         case CSP_MODE_CIPHER:
 998                 switch (cop->op) {
 999                 case COP_ENCRYPT:
1000                         crp->crp_op = CRYPTO_OP_ENCRYPT;
1001                         break;
1002                 case COP_DECRYPT:
1003                         crp->crp_op = CRYPTO_OP_DECRYPT;
1004                         break;
1005                 default:
1006                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1007                         error = EINVAL;
1008                         goto bail;
1009                 }
1010                 break;
1011         case CSP_MODE_DIGEST:
1012                 switch (cop->op) {
1013                 case 0:
1014                 case COP_ENCRYPT:
1015                 case COP_DECRYPT:
1016                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
1017                         if (cod->obuf != NULL)
1018                                 crp->crp_digest_start = 0;
1019                         break;
1020                 default:
1021                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1022                         error = EINVAL;
1023                         goto bail;
1024                 }
1025                 break;
1026         case CSP_MODE_ETA:
1027                 switch (cop->op) {
1028                 case COP_ENCRYPT:
1029                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1030                             CRYPTO_OP_COMPUTE_DIGEST;
1031                         break;
1032                 case COP_DECRYPT:
1033                         crp->crp_op = CRYPTO_OP_DECRYPT |
1034                             CRYPTO_OP_VERIFY_DIGEST;
1035                         break;
1036                 default:
1037                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1038                         error = EINVAL;
1039                         goto bail;
1040                 }
1041                 break;
1042         default:
1043                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1044                 error = EINVAL;
1045                 goto bail;
1046         }
1047
1048         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
1049         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
1050         if (cod->obuf)
1051                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
1052         crp->crp_callback = cryptodev_cb;
1053         crp->crp_opaque = cod;
1054
1055         if (cop->iv) {
1056                 if (cse->ivsize == 0) {
1057                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1058                         error = EINVAL;
1059                         goto bail;
1060                 }
1061                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
1062                 if (error) {
1063                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1064                         goto bail;
1065                 }
1066                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1067         } else if (cse->ivsize != 0) {
1068                 crp->crp_iv_start = 0;
1069                 crp->crp_payload_start += cse->ivsize;
1070                 crp->crp_payload_length -= cse->ivsize;
1071                 cop->dst += cse->ivsize;
1072         }
1073
1074         if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1075                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
1076                     cse->hashsize);
1077                 if (error) {
1078                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1079                         goto bail;
1080                 }
1081         }
1082 again:
1083         /*
1084          * Let the dispatch run unlocked, then, interlock against the
1085          * callback before checking if the operation completed and going
1086          * to sleep.  This insures drivers don't inherit our lock which
1087          * results in a lock order reversal between crypto_dispatch forced
1088          * entry and the crypto_done callback into us.
1089          */
1090         error = crypto_dispatch(crp);
1091         if (error != 0) {
1092                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1093                 goto bail;
1094         }
1095
1096         mtx_lock(&cse->lock);
1097         while (!cod->done)
1098                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1099         mtx_unlock(&cse->lock);
1100
1101         if (crp->crp_etype == EAGAIN) {
1102                 crp->crp_etype = 0;
1103                 crp->crp_flags &= ~CRYPTO_F_DONE;
1104                 cod->done = false;
1105                 goto again;
1106         }
1107
1108         if (crp->crp_etype != 0) {
1109                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1110                 error = crp->crp_etype;
1111                 goto bail;
1112         }
1113
1114         if (cop->dst != NULL) {
1115                 error = copyout(cod->obuf != NULL ? cod->obuf :
1116                     cod->buf + crp->crp_payload_start, cop->dst,
1117                     crp->crp_payload_length);
1118                 if (error) {
1119                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1120                         goto bail;
1121                 }
1122         }
1123
1124         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1125                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1126                     crp->crp_digest_start, cop->mac, cse->hashsize);
1127                 if (error) {
1128                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1129                         goto bail;
1130                 }
1131         }
1132
1133 bail:
1134         crypto_freereq(crp);
1135         cod_free(cod);
1136
1137         return (error);
1138 }
1139
1140 static int
1141 cryptodev_aead(
1142         struct csession *cse,
1143         struct crypt_aead *caead,
1144         struct ucred *active_cred,
1145         struct thread *td)
1146 {
1147         struct cryptop_data *cod = NULL;
1148         struct cryptop *crp = NULL;
1149         int error;
1150
1151         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1152                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1153                 return (E2BIG);
1154         }
1155
1156         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1157             (caead->len % cse->txform->blocksize) != 0) {
1158                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1159                 return (EINVAL);
1160         }
1161
1162         /*
1163          * The COP_F_CIPHER_FIRST flag predates explicit session
1164          * modes, but the only way it was used was for EtA so allow it
1165          * as long as it is consistent with EtA.
1166          */
1167         if (caead->flags & COP_F_CIPHER_FIRST) {
1168                 if (caead->op != COP_ENCRYPT) {
1169                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1170                         return (EINVAL);
1171                 }
1172         }
1173
1174         cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize, td);
1175
1176         crp = crypto_getreq(cse->cses, M_WAITOK);
1177
1178         if (cod->aad != NULL)
1179                 error = copyin(caead->aad, cod->aad, caead->aadlen);
1180         else
1181                 error = copyin(caead->aad, cod->buf, caead->aadlen);
1182         if (error) {
1183                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1184                 goto bail;
1185         }
1186         crp->crp_aad = cod->aad;
1187         crp->crp_aad_start = 0;
1188         crp->crp_aad_length = caead->aadlen;
1189
1190         if (cod->aad != NULL)
1191                 crp->crp_payload_start = 0;
1192         else
1193                 crp->crp_payload_start = caead->aadlen;
1194         error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1195             caead->len);
1196         if (error) {
1197                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1198                 goto bail;
1199         }
1200         crp->crp_payload_length = caead->len;
1201         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1202                 crp->crp_digest_start = crp->crp_payload_output_start +
1203                     caead->len;
1204         else
1205                 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1206
1207         switch (cse->mode) {
1208         case CSP_MODE_AEAD:
1209         case CSP_MODE_ETA:
1210                 switch (caead->op) {
1211                 case COP_ENCRYPT:
1212                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1213                             CRYPTO_OP_COMPUTE_DIGEST;
1214                         break;
1215                 case COP_DECRYPT:
1216                         crp->crp_op = CRYPTO_OP_DECRYPT |
1217                             CRYPTO_OP_VERIFY_DIGEST;
1218                         break;
1219                 default:
1220                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1221                         error = EINVAL;
1222                         goto bail;
1223                 }
1224                 break;
1225         default:
1226                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1227                 error = EINVAL;
1228                 goto bail;
1229         }
1230
1231         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1232         crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1233             cse->hashsize);
1234         if (cod->obuf != NULL)
1235                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1236                     cse->hashsize);
1237         crp->crp_callback = cryptodev_cb;
1238         crp->crp_opaque = cod;
1239
1240         if (caead->iv) {
1241                 /*
1242                  * Permit a 16-byte IV for AES-XTS, but only use the
1243                  * first 8 bytes as a block number.
1244                  */
1245                 if (cse->mode == CSP_MODE_ETA &&
1246                     caead->ivlen == AES_BLOCK_LEN &&
1247                     cse->ivsize == AES_XTS_IV_LEN)
1248                         caead->ivlen = AES_XTS_IV_LEN;
1249
1250                 if (caead->ivlen != cse->ivsize) {
1251                         error = EINVAL;
1252                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1253                         goto bail;
1254                 }
1255
1256                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1257                 if (error) {
1258                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1259                         goto bail;
1260                 }
1261                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1262         } else {
1263                 crp->crp_iv_start = crp->crp_payload_start;
1264                 crp->crp_payload_start += cse->ivsize;
1265                 crp->crp_payload_length -= cse->ivsize;
1266                 caead->dst += cse->ivsize;
1267         }
1268
1269         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1270                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1271                     cse->hashsize);
1272                 if (error) {
1273                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1274                         goto bail;
1275                 }
1276         }
1277 again:
1278         /*
1279          * Let the dispatch run unlocked, then, interlock against the
1280          * callback before checking if the operation completed and going
1281          * to sleep.  This insures drivers don't inherit our lock which
1282          * results in a lock order reversal between crypto_dispatch forced
1283          * entry and the crypto_done callback into us.
1284          */
1285         error = crypto_dispatch(crp);
1286         if (error != 0) {
1287                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1288                 goto bail;
1289         }
1290
1291         mtx_lock(&cse->lock);
1292         while (!cod->done)
1293                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1294         mtx_unlock(&cse->lock);
1295
1296         if (crp->crp_etype == EAGAIN) {
1297                 crp->crp_etype = 0;
1298                 crp->crp_flags &= ~CRYPTO_F_DONE;
1299                 cod->done = false;
1300                 goto again;
1301         }
1302
1303         if (crp->crp_etype != 0) {
1304                 error = crp->crp_etype;
1305                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1306                 goto bail;
1307         }
1308
1309         if (caead->dst != NULL) {
1310                 error = copyout(cod->obuf != NULL ? cod->obuf :
1311                     cod->buf + crp->crp_payload_start, caead->dst,
1312                     crp->crp_payload_length);
1313                 if (error) {
1314                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1315                         goto bail;
1316                 }
1317         }
1318
1319         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1320                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1321                     crp->crp_digest_start, caead->tag, cse->hashsize);
1322                 if (error) {
1323                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1324                         goto bail;
1325                 }
1326         }
1327
1328 bail:
1329         crypto_freereq(crp);
1330         cod_free(cod);
1331
1332         return (error);
1333 }
1334
1335 static int
1336 cryptodev_cb(struct cryptop *crp)
1337 {
1338         struct cryptop_data *cod = crp->crp_opaque;
1339
1340         /*
1341          * Lock to ensure the wakeup() is not missed by the loops
1342          * waiting on cod->done in cryptodev_op() and
1343          * cryptodev_aead().
1344          */
1345         mtx_lock(&cod->cse->lock);
1346         cod->done = true;
1347         mtx_unlock(&cod->cse->lock);
1348         wakeup(cod);
1349         return (0);
1350 }
1351
1352 static void
1353 cryptodevkey_cb(struct cryptkop *krp)
1354 {
1355
1356         wakeup_one(krp);
1357 }
1358
1359 static int
1360 cryptodev_key(struct crypt_kop *kop)
1361 {
1362         struct cryptkop *krp = NULL;
1363         int error = EINVAL;
1364         int in, out, size, i;
1365
1366         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1367                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1368                 return (EFBIG);
1369         }
1370
1371         in = kop->crk_iparams;
1372         out = kop->crk_oparams;
1373         switch (kop->crk_op) {
1374         case CRK_MOD_EXP:
1375                 if (in == 3 && out == 1)
1376                         break;
1377                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1378                 return (EINVAL);
1379         case CRK_MOD_EXP_CRT:
1380                 if (in == 6 && out == 1)
1381                         break;
1382                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1383                 return (EINVAL);
1384         case CRK_DSA_SIGN:
1385                 if (in == 5 && out == 2)
1386                         break;
1387                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1388                 return (EINVAL);
1389         case CRK_DSA_VERIFY:
1390                 if (in == 7 && out == 0)
1391                         break;
1392                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1393                 return (EINVAL);
1394         case CRK_DH_COMPUTE_KEY:
1395                 if (in == 3 && out == 1)
1396                         break;
1397                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1398                 return (EINVAL);
1399         default:
1400                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1401                 return (EINVAL);
1402         }
1403
1404         krp = malloc(sizeof(*krp), M_XDATA, M_WAITOK | M_ZERO);
1405         krp->krp_op = kop->crk_op;
1406         krp->krp_status = kop->crk_status;
1407         krp->krp_iparams = kop->crk_iparams;
1408         krp->krp_oparams = kop->crk_oparams;
1409         krp->krp_crid = kop->crk_crid;
1410         krp->krp_status = 0;
1411         krp->krp_callback = cryptodevkey_cb;
1412
1413         for (i = 0; i < CRK_MAXPARAM; i++) {
1414                 if (kop->crk_param[i].crp_nbits > 65536) {
1415                         /* Limit is the same as in OpenBSD */
1416                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1417                         goto fail;
1418                 }
1419                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1420         }
1421         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1422                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1423                 if (size == 0)
1424                         continue;
1425                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1426                 if (i >= krp->krp_iparams)
1427                         continue;
1428                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1429                 if (error) {
1430                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1431                         goto fail;
1432                 }
1433         }
1434
1435         error = crypto_kdispatch(krp);
1436         if (error) {
1437                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1438                 goto fail;
1439         }
1440         error = tsleep(krp, PSOCK, "crydev", 0);
1441         if (error) {
1442                 /* XXX can this happen?  if so, how do we recover? */
1443                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1444                 goto fail;
1445         }
1446
1447         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1448         if (krp->krp_status != 0) {
1449                 error = krp->krp_status;
1450                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1451                 goto fail;
1452         }
1453
1454         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1455                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1456                 if (size == 0)
1457                         continue;
1458                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1459                 if (error) {
1460                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1461                         goto fail;
1462                 }
1463         }
1464
1465 fail:
1466         if (krp) {
1467                 kop->crk_status = krp->krp_status;
1468                 for (i = 0; i < CRK_MAXPARAM; i++) {
1469                         if (krp->krp_param[i].crp_p)
1470                                 free(krp->krp_param[i].crp_p, M_XDATA);
1471                 }
1472                 free(krp, M_XDATA);
1473         }
1474         return (error);
1475 }
1476
1477 static int
1478 cryptodev_find(struct crypt_find_op *find)
1479 {
1480         device_t dev;
1481         size_t fnlen = sizeof find->name;
1482
1483         if (find->crid != -1) {
1484                 dev = crypto_find_device_byhid(find->crid);
1485                 if (dev == NULL)
1486                         return (ENOENT);
1487                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1488                 find->name[fnlen - 1] = '\x0';
1489         } else {
1490                 find->name[fnlen - 1] = '\x0';
1491                 find->crid = crypto_find_driver(find->name);
1492                 if (find->crid == -1)
1493                         return (ENOENT);
1494         }
1495         return (0);
1496 }
1497
1498 /* ARGSUSED */
1499 static int
1500 cryptof_stat(
1501         struct file *fp,
1502         struct stat *sb,
1503         struct ucred *active_cred,
1504         struct thread *td)
1505 {
1506
1507         return (EOPNOTSUPP);
1508 }
1509
1510 /* ARGSUSED */
1511 static int
1512 cryptof_close(struct file *fp, struct thread *td)
1513 {
1514         struct fcrypt *fcr = fp->f_data;
1515         struct csession *cse;
1516
1517         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1518                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1519                 KASSERT(cse->refs == 1,
1520                     ("%s: crypto session %p with %d refs", __func__, cse,
1521                     cse->refs));
1522                 csefree(cse);
1523         }
1524         free(fcr, M_XDATA);
1525         fp->f_data = NULL;
1526         return 0;
1527 }
1528
1529 static int
1530 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1531 {
1532
1533         kif->kf_type = KF_TYPE_CRYPTO;
1534         return (0);
1535 }
1536
1537 static struct csession *
1538 csefind(struct fcrypt *fcr, u_int ses)
1539 {
1540         struct csession *cse;
1541
1542         mtx_lock(&fcr->lock);
1543         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1544                 if (cse->ses == ses) {
1545                         refcount_acquire(&cse->refs);
1546                         mtx_unlock(&fcr->lock);
1547                         return (cse);
1548                 }
1549         }
1550         mtx_unlock(&fcr->lock);
1551         return (NULL);
1552 }
1553
1554 static bool
1555 csedelete(struct fcrypt *fcr, u_int ses)
1556 {
1557         struct csession *cse;
1558
1559         mtx_lock(&fcr->lock);
1560         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1561                 if (cse->ses == ses) {
1562                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1563                         mtx_unlock(&fcr->lock);
1564                         csefree(cse);
1565                         return (true);
1566                 }
1567         }
1568         mtx_unlock(&fcr->lock);
1569         return (false);
1570 }
1571
1572 struct csession *
1573 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1574     struct crypto_session_params *csp, struct enc_xform *txform,
1575     void *key, struct auth_hash *thash, void *mackey)
1576 {
1577         struct csession *cse;
1578
1579         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1580         if (cse == NULL)
1581                 return NULL;
1582         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1583         refcount_init(&cse->refs, 1);
1584         cse->key = key;
1585         cse->mackey = mackey;
1586         cse->mode = csp->csp_mode;
1587         cse->cses = cses;
1588         cse->txform = txform;
1589         if (thash != NULL)
1590                 cse->hashsize = thash->hashsize;
1591         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1592                 cse->hashsize = AES_GMAC_HASH_LEN;
1593         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1594                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1595         cse->ivsize = csp->csp_ivlen;
1596         mtx_lock(&fcr->lock);
1597         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1598         cse->ses = fcr->sesn++;
1599         mtx_unlock(&fcr->lock);
1600         return (cse);
1601 }
1602
1603 static void
1604 csefree(struct csession *cse)
1605 {
1606
1607         if (!refcount_release(&cse->refs))
1608                 return;
1609         crypto_freesession(cse->cses);
1610         mtx_destroy(&cse->lock);
1611         if (cse->key)
1612                 free(cse->key, M_XDATA);
1613         if (cse->mackey)
1614                 free(cse->mackey, M_XDATA);
1615         free(cse, M_XDATA);
1616 }
1617
1618 static int
1619 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1620 {
1621         struct file *f;
1622         struct fcrypt *fcr;
1623         int fd, error;
1624
1625         switch (cmd) {
1626         case CRIOGET:
1627                 error = falloc_noinstall(td, &f);
1628                 if (error)
1629                         break;
1630
1631                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1632                 TAILQ_INIT(&fcr->csessions);
1633                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1634
1635                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1636                 error = finstall(td, f, &fd, 0, NULL);
1637                 if (error) {
1638                         mtx_destroy(&fcr->lock);
1639                         free(fcr, M_XDATA);
1640                 } else
1641                         *(uint32_t *)data = fd;
1642                 fdrop(f, td);
1643                 break;
1644         case CRIOFINDDEV:
1645                 error = cryptodev_find((struct crypt_find_op *)data);
1646                 break;
1647         case CRIOASYMFEAT:
1648                 error = crypto_getfeat((int *)data);
1649                 break;
1650         default:
1651                 error = EINVAL;
1652                 break;
1653         }
1654         return (error);
1655 }
1656
1657 static struct cdevsw crypto_cdevsw = {
1658         .d_version =    D_VERSION,
1659         .d_ioctl =      cryptoioctl,
1660         .d_name =       "crypto",
1661 };
1662 static struct cdev *crypto_dev;
1663
1664 /*
1665  * Initialization code, both for static and dynamic loading.
1666  */
1667 static int
1668 cryptodev_modevent(module_t mod, int type, void *unused)
1669 {
1670         switch (type) {
1671         case MOD_LOAD:
1672                 if (bootverbose)
1673                         printf("crypto: <crypto device>\n");
1674                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1675                                       UID_ROOT, GID_WHEEL, 0666,
1676                                       "crypto");
1677                 return 0;
1678         case MOD_UNLOAD:
1679                 /*XXX disallow if active sessions */
1680                 destroy_dev(crypto_dev);
1681                 return 0;
1682         }
1683         return EINVAL;
1684 }
1685
1686 static moduledata_t cryptodev_mod = {
1687         "cryptodev",
1688         cryptodev_modevent,
1689         0
1690 };
1691 MODULE_VERSION(cryptodev, 1);
1692 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1693 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1694 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);