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         uint32_t        cipher;
  76         uint32_t        mac;
  77         uint32_t        keylen;
  78         uint32_t        key;
  79         int             mackeylen;
  80         uint32_t        mackey;
  81         uint32_t        ses;
  82 };
  83
  84 struct session2_op32 {
  85         uint32_t        cipher;
  86         uint32_t        mac;
  87         uint32_t        keylen;
  88         uint32_t        key;
  89         int             mackeylen;
  90         uint32_t        mackey;
  91         uint32_t        ses;
  92         int             crid;
  93         int             pad[4];
  94 };
  95
  96 struct crypt_op32 {
  97         uint32_t        ses;
  98         uint16_t        op;
  99         uint16_t        flags;
 100         u_int           len;
 101         uint32_t        src, dst;
 102         uint32_t        mac;
 103         uint32_t        iv;
 104 };
 105
 106 struct crypt_aead32 {
 107         uint32_t        ses;
 108         uint16_t        op;
 109         uint16_t        flags;
 110         u_int           len;
 111         u_int           aadlen;
 112         u_int           ivlen;
 113         uint32_t        src;
 114         uint32_t        dst;
 115         uint32_t        aad;
 116         uint32_t        tag;
 117         uint32_t        iv;
 118 };
 119
 120 struct crparam32 {
 121         uint32_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         uint32_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 struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
 350 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
 351     &warninterval,
 352     "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
 353
 354 static int cryptof_ioctl(struct file *, u_long, void *, struct ucred *,
 355     struct thread *);
 356 static int cryptof_stat(struct file *, struct stat *, struct ucred *,
 357     struct thread *);
 358 static int cryptof_close(struct file *, struct thread *);
 359 static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 360     struct filedesc *);
 361
 362 static struct fileops cryptofops = {
 363     .fo_read = invfo_rdwr,
 364     .fo_write = invfo_rdwr,
 365     .fo_truncate = invfo_truncate,
 366     .fo_ioctl = cryptof_ioctl,
 367     .fo_poll = invfo_poll,
 368     .fo_kqfilter = invfo_kqfilter,
 369     .fo_stat = cryptof_stat,
 370     .fo_close = cryptof_close,
 371     .fo_chmod = invfo_chmod,
 372     .fo_chown = invfo_chown,
 373     .fo_sendfile = invfo_sendfile,
 374     .fo_fill_kinfo = cryptof_fill_kinfo,
 375 };
 376
 377 static struct csession *csefind(struct fcrypt *, u_int);
 378 static bool csedelete(struct fcrypt *, u_int);
 379 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 380     struct crypto_session_params *, struct enc_xform *, void *,
 381     struct auth_hash *, void *);
 382 static void csefree(struct csession *);
 383
 384 static int cryptodev_op(struct csession *, const struct crypt_op *,
 385     struct ucred *, struct thread *);
 386 static int cryptodev_aead(struct csession *, struct crypt_aead *,
 387     struct ucred *, struct thread *);
 388 static int cryptodev_key(struct crypt_kop *);
 389 static int cryptodev_find(struct crypt_find_op *);
 390
 391 /*
 392  * Check a crypto identifier to see if it requested
 393  * a software device/driver.  This can be done either
 394  * by device name/class or through search constraints.
 395  */
 396 static int
 397 checkforsoftware(int *cridp)
 398 {
 399         int crid;
 400
 401         crid = *cridp;
 402
 403         if (!crypto_devallowsoft) {
 404                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 405                         if (crid & CRYPTOCAP_F_HARDWARE) {
 406                                 *cridp = CRYPTOCAP_F_HARDWARE;
 407                                 return 0;
 408                         }
 409                         return EINVAL;
 410                 }
 411                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 412                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 413                         return EINVAL;
 414         }
 415         return 0;
 416 }
 417
 418 /* ARGSUSED */
 419 static int
 420 cryptof_ioctl(struct file *fp, u_long cmd, void *data,
 421     struct ucred *active_cred, struct thread *td)
 422 {
 423         static struct timeval keywarn, featwarn;
 424         struct crypto_session_params csp;
 425         struct fcrypt *fcr = fp->f_data;
 426         struct csession *cse;
 427         struct session2_op *sop;
 428         struct crypt_op *cop;
 429         struct crypt_aead *caead;
 430         struct enc_xform *txform = NULL;
 431         struct auth_hash *thash = NULL;
 432         void *key = NULL;
 433         void *mackey = NULL;
 434         struct crypt_kop *kop;
 435         crypto_session_t cses;
 436         uint32_t ses;
 437         int error = 0, crid;
 438         union {
 439                 struct session2_op sopc;
 440 #ifdef COMPAT_FREEBSD32
 441                 struct crypt_op copc;
 442                 struct crypt_aead aeadc;
 443                 struct crypt_kop kopc;
 444 #endif
 445         } thunk;
 446 #ifdef COMPAT_FREEBSD32
 447         u_long cmd32;
 448         void *data32;
 449
 450         cmd32 = 0;
 451         data32 = NULL;
 452         switch (cmd) {
 453         case CIOCGSESSION32:
 454                 cmd32 = cmd;
 455                 data32 = data;
 456                 cmd = CIOCGSESSION;
 457                 data = &thunk.sopc;
 458                 session_op_from_32((struct session_op32 *)data32, &thunk.sopc);
 459                 break;
 460         case CIOCGSESSION232:
 461                 cmd32 = cmd;
 462                 data32 = data;
 463                 cmd = CIOCGSESSION2;
 464                 data = &thunk.sopc;
 465                 session2_op_from_32((struct session2_op32 *)data32,
 466                     &thunk.sopc);
 467                 break;
 468         case CIOCCRYPT32:
 469                 cmd32 = cmd;
 470                 data32 = data;
 471                 cmd = CIOCCRYPT;
 472                 data = &thunk.copc;
 473                 crypt_op_from_32((struct crypt_op32 *)data32, &thunk.copc);
 474                 break;
 475         case CIOCCRYPTAEAD32:
 476                 cmd32 = cmd;
 477                 data32 = data;
 478                 cmd = CIOCCRYPTAEAD;
 479                 data = &thunk.aeadc;
 480                 crypt_aead_from_32((struct crypt_aead32 *)data32, &thunk.aeadc);
 481                 break;
 482         case CIOCKEY32:
 483         case CIOCKEY232:
 484                 cmd32 = cmd;
 485                 data32 = data;
 486                 if (cmd == CIOCKEY32)
 487                         cmd = CIOCKEY;
 488                 else
 489                         cmd = CIOCKEY2;
 490                 data = &thunk.kopc;
 491                 crypt_kop_from_32((struct crypt_kop32 *)data32, &thunk.kopc);
 492                 break;
 493         }
 494 #endif
 495
 496         switch (cmd) {
 497         case CIOCGSESSION:
 498         case CIOCGSESSION2:
 499                 if (cmd == CIOCGSESSION) {
 500                         session2_op_from_op(data, &thunk.sopc);
 501                         sop = &thunk.sopc;
 502                 } else
 503                         sop = (struct session2_op *)data;
 504
 505                 switch (sop->cipher) {
 506                 case 0:
 507                         break;
 508                 case CRYPTO_AES_CBC:
 509                         txform = &enc_xform_rijndael128;
 510                         break;
 511                 case CRYPTO_AES_XTS:
 512                         txform = &enc_xform_aes_xts;
 513                         break;
 514                 case CRYPTO_NULL_CBC:
 515                         txform = &enc_xform_null;
 516                         break;
 517                 case CRYPTO_CAMELLIA_CBC:
 518                         txform = &enc_xform_camellia;
 519                         break;
 520                 case CRYPTO_AES_ICM:
 521                         txform = &enc_xform_aes_icm;
 522                         break;
 523                 case CRYPTO_AES_NIST_GCM_16:
 524                         txform = &enc_xform_aes_nist_gcm;
 525                         break;
 526                 case CRYPTO_CHACHA20:
 527                         txform = &enc_xform_chacha20;
 528                         break;
 529                 case CRYPTO_AES_CCM_16:
 530                         txform = &enc_xform_ccm;
 531                         break;
 532
 533                 default:
 534                         CRYPTDEB("invalid cipher");
 535                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 536                         return (EINVAL);
 537                 }
 538
 539                 switch (sop->mac) {
 540                 case 0:
 541                         break;
 542                 case CRYPTO_POLY1305:
 543                         thash = &auth_hash_poly1305;
 544                         break;
 545                 case CRYPTO_SHA1_HMAC:
 546                         thash = &auth_hash_hmac_sha1;
 547                         break;
 548                 case CRYPTO_SHA2_224_HMAC:
 549                         thash = &auth_hash_hmac_sha2_224;
 550                         break;
 551                 case CRYPTO_SHA2_256_HMAC:
 552                         thash = &auth_hash_hmac_sha2_256;
 553                         break;
 554                 case CRYPTO_SHA2_384_HMAC:
 555                         thash = &auth_hash_hmac_sha2_384;
 556                         break;
 557                 case CRYPTO_SHA2_512_HMAC:
 558                         thash = &auth_hash_hmac_sha2_512;
 559                         break;
 560                 case CRYPTO_RIPEMD160_HMAC:
 561                         thash = &auth_hash_hmac_ripemd_160;
 562                         break;
 563 #ifdef COMPAT_FREEBSD12
 564                 case CRYPTO_AES_128_NIST_GMAC:
 565                 case CRYPTO_AES_192_NIST_GMAC:
 566                 case CRYPTO_AES_256_NIST_GMAC:
 567                         /* Should always be paired with GCM. */
 568                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 569                                 CRYPTDEB("GMAC without GCM");
 570                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 571                                     __LINE__);
 572                                 return (EINVAL);
 573                         }
 574                         break;
 575 #endif
 576                 case CRYPTO_AES_NIST_GMAC:
 577                         switch (sop->mackeylen * 8) {
 578                         case 128:
 579                                 thash = &auth_hash_nist_gmac_aes_128;
 580                                 break;
 581                         case 192:
 582                                 thash = &auth_hash_nist_gmac_aes_192;
 583                                 break;
 584                         case 256:
 585                                 thash = &auth_hash_nist_gmac_aes_256;
 586                                 break;
 587                         default:
 588                                 CRYPTDEB("invalid GMAC key length");
 589                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 590                                     __LINE__);
 591                                 return (EINVAL);
 592                         }
 593                         break;
 594                 case CRYPTO_AES_CCM_CBC_MAC:
 595                         switch (sop->mackeylen) {
 596                         case 16:
 597                                 thash = &auth_hash_ccm_cbc_mac_128;
 598                                 break;
 599                         case 24:
 600                                 thash = &auth_hash_ccm_cbc_mac_192;
 601                                 break;
 602                         case 32:
 603                                 thash = &auth_hash_ccm_cbc_mac_256;
 604                                 break;
 605                         default:
 606                                 CRYPTDEB("Invalid CBC MAC key size %d",
 607                                     sop->keylen);
 608                                 SDT_PROBE1(opencrypto, dev, ioctl,
 609                                     error, __LINE__);
 610                                 return (EINVAL);
 611                         }
 612                         break;
 613                 case CRYPTO_SHA1:
 614                         thash = &auth_hash_sha1;
 615                         break;
 616                 case CRYPTO_SHA2_224:
 617                         thash = &auth_hash_sha2_224;
 618                         break;
 619                 case CRYPTO_SHA2_256:
 620                         thash = &auth_hash_sha2_256;
 621                         break;
 622                 case CRYPTO_SHA2_384:
 623                         thash = &auth_hash_sha2_384;
 624                         break;
 625                 case CRYPTO_SHA2_512:
 626                         thash = &auth_hash_sha2_512;
 627                         break;
 628
 629                 case CRYPTO_NULL_HMAC:
 630                         thash = &auth_hash_null;
 631                         break;
 632
 633                 case CRYPTO_BLAKE2B:
 634                         thash = &auth_hash_blake2b;
 635                         break;
 636                 case CRYPTO_BLAKE2S:
 637                         thash = &auth_hash_blake2s;
 638                         break;
 639
 640                 default:
 641                         CRYPTDEB("invalid mac");
 642                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 643                         return (EINVAL);
 644                 }
 645
 646                 if (txform == NULL && thash == NULL) {
 647                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 648                         return (EINVAL);
 649                 }
 650
 651                 memset(&csp, 0, sizeof(csp));
 652                 if (use_outputbuffers)
 653                         csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 654
 655                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 656                         switch (sop->mac) {
 657 #ifdef COMPAT_FREEBSD12
 658                         case CRYPTO_AES_128_NIST_GMAC:
 659                         case CRYPTO_AES_192_NIST_GMAC:
 660                         case CRYPTO_AES_256_NIST_GMAC:
 661                                 if (sop->keylen != sop->mackeylen) {
 662                                         SDT_PROBE1(opencrypto, dev, ioctl,
 663                                             error, __LINE__);
 664                                         return (EINVAL);
 665                                 }
 666                                 break;
 667 #endif
 668                         case 0:
 669                                 break;
 670                         default:
 671                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 672                                     __LINE__);
 673                                 return (EINVAL);
 674                         }
 675                         csp.csp_mode = CSP_MODE_AEAD;
 676                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 677                         switch (sop->mac) {
 678 #ifdef COMPAT_FREEBSD12
 679                         case CRYPTO_AES_CCM_CBC_MAC:
 680                                 if (sop->keylen != sop->mackeylen) {
 681                                         SDT_PROBE1(opencrypto, dev, ioctl,
 682                                             error, __LINE__);
 683                                         return (EINVAL);
 684                                 }
 685                                 thash = NULL;
 686                                 break;
 687 #endif
 688                         case 0:
 689                                 break;
 690                         default:
 691                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 692                                     __LINE__);
 693                                 return (EINVAL);
 694                         }
 695                         csp.csp_mode = CSP_MODE_AEAD;
 696                 } else if (txform && thash)
 697                         csp.csp_mode = CSP_MODE_ETA;
 698                 else if (txform)
 699                         csp.csp_mode = CSP_MODE_CIPHER;
 700                 else
 701                         csp.csp_mode = CSP_MODE_DIGEST;
 702
 703                 switch (csp.csp_mode) {
 704                 case CSP_MODE_AEAD:
 705                 case CSP_MODE_ETA:
 706                         if (use_separate_aad)
 707                                 csp.csp_flags |= CSP_F_SEPARATE_AAD;
 708                         break;
 709                 }
 710
 711                 if (txform) {
 712                         csp.csp_cipher_alg = txform->type;
 713                         csp.csp_cipher_klen = sop->keylen;
 714                         if (sop->keylen > txform->maxkey ||
 715                             sop->keylen < txform->minkey) {
 716                                 CRYPTDEB("invalid cipher parameters");
 717                                 error = EINVAL;
 718                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 719                                     __LINE__);
 720                                 goto bail;
 721                         }
 722
 723                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 724                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 725                         if (error) {
 726                                 CRYPTDEB("invalid key");
 727                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 728                                     __LINE__);
 729                                 goto bail;
 730                         }
 731                         csp.csp_cipher_key = key;
 732                         csp.csp_ivlen = txform->ivsize;
 733                 }
 734
 735                 if (thash) {
 736                         csp.csp_auth_alg = thash->type;
 737                         csp.csp_auth_klen = sop->mackeylen;
 738                         if (sop->mackeylen > thash->keysize ||
 739                             sop->mackeylen < 0) {
 740                                 CRYPTDEB("invalid mac key length");
 741                                 error = EINVAL;
 742                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 743                                     __LINE__);
 744                                 goto bail;
 745                         }
 746
 747                         if (csp.csp_auth_klen) {
 748                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 749                                     M_WAITOK);
 750                                 error = copyin(sop->mackey, mackey,
 751                                     csp.csp_auth_klen);
 752                                 if (error) {
 753                                         CRYPTDEB("invalid mac key");
 754                                         SDT_PROBE1(opencrypto, dev, ioctl,
 755                                             error, __LINE__);
 756                                         goto bail;
 757                                 }
 758                                 csp.csp_auth_key = mackey;
 759                         }
 760
 761                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 762                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 763                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 764                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 765                 }
 766
 767                 crid = sop->crid;
 768                 error = checkforsoftware(&crid);
 769                 if (error) {
 770                         CRYPTDEB("checkforsoftware");
 771                         SDT_PROBE1(opencrypto, dev, ioctl, error,
 772                             __LINE__);
 773                         goto bail;
 774                 }
 775                 error = crypto_newsession(&cses, &csp, crid);
 776                 if (error) {
 777                         CRYPTDEB("crypto_newsession");
 778                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 779                         goto bail;
 780                 }
 781
 782                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 783
 784                 if (cse == NULL) {
 785                         crypto_freesession(cses);
 786                         error = EINVAL;
 787                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 788                         CRYPTDEB("csecreate");
 789                         goto bail;
 790                 }
 791                 sop->ses = cse->ses;
 792
 793                 /* return hardware/driver id */
 794                 sop->crid = crypto_ses2hid(cse->cses);
 795 bail:
 796                 if (error) {
 797                         free(key, M_XDATA);
 798                         free(mackey, M_XDATA);
 799                 }
 800
 801                 if (cmd == CIOCGSESSION && error == 0)
 802                         session2_op_to_op(sop, data);
 803                 break;
 804         case CIOCFSESSION:
 805                 ses = *(uint32_t *)data;
 806                 if (!csedelete(fcr, ses)) {
 807                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 808                         return (EINVAL);
 809                 }
 810                 break;
 811         case CIOCCRYPT:
 812                 cop = (struct crypt_op *)data;
 813                 cse = csefind(fcr, cop->ses);
 814                 if (cse == NULL) {
 815                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 816                         return (EINVAL);
 817                 }
 818                 error = cryptodev_op(cse, cop, active_cred, td);
 819                 csefree(cse);
 820                 break;
 821         case CIOCKEY:
 822         case CIOCKEY2:
 823                 if (ratecheck(&keywarn, &warninterval))
 824                         gone_in(14,
 825                             "Asymmetric crypto operations via /dev/crypto");
 826
 827                 if (!crypto_userasymcrypto) {
 828                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 829                         return (EPERM);         /* XXX compat? */
 830                 }
 831                 kop = (struct crypt_kop *)data;
 832                 if (cmd == CIOCKEY) {
 833                         /* NB: crypto core enforces s/w driver use */
 834                         kop->crk_crid =
 835                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 836                 }
 837                 mtx_lock(&Giant);
 838                 error = cryptodev_key(kop);
 839                 mtx_unlock(&Giant);
 840                 break;
 841         case CIOCASYMFEAT:
 842                 if (ratecheck(&featwarn, &warninterval))
 843                         gone_in(14,
 844                             "Asymmetric crypto features via /dev/crypto");
 845
 846                 if (!crypto_userasymcrypto) {
 847                         /*
 848                          * NB: if user asym crypto operations are
 849                          * not permitted return "no algorithms"
 850                          * so well-behaved applications will just
 851                          * fallback to doing them in software.
 852                          */
 853                         *(int *)data = 0;
 854                 } else {
 855                         error = crypto_getfeat((int *)data);
 856                         if (error)
 857                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 858                                     __LINE__);
 859                 }
 860                 break;
 861         case CIOCFINDDEV:
 862                 error = cryptodev_find((struct crypt_find_op *)data);
 863                 break;
 864         case CIOCCRYPTAEAD:
 865                 caead = (struct crypt_aead *)data;
 866                 cse = csefind(fcr, caead->ses);
 867                 if (cse == NULL) {
 868                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 869                         return (EINVAL);
 870                 }
 871                 error = cryptodev_aead(cse, caead, active_cred, td);
 872                 csefree(cse);
 873                 break;
 874         default:
 875                 error = EINVAL;
 876                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 877                 break;
 878         }
 879
 880 #ifdef COMPAT_FREEBSD32
 881         switch (cmd32) {
 882         case CIOCGSESSION32:
 883                 if (error == 0)
 884                         session_op_to_32(data, data32);
 885                 break;
 886         case CIOCGSESSION232:
 887                 if (error == 0)
 888                         session2_op_to_32(data, data32);
 889                 break;
 890         case CIOCCRYPT32:
 891                 if (error == 0)
 892                         crypt_op_to_32(data, data32);
 893                 break;
 894         case CIOCCRYPTAEAD32:
 895                 if (error == 0)
 896                         crypt_aead_to_32(data, data32);
 897                 break;
 898         case CIOCKEY32:
 899         case CIOCKEY232:
 900                 crypt_kop_to_32(data, data32);
 901                 break;
 902         }
 903 #endif
 904         return (error);
 905 }
 906
 907 static struct cryptop_data *
 908 cod_alloc(struct csession *cse, size_t aad_len, size_t len, struct thread *td)
 909 {
 910         struct cryptop_data *cod;
 911
 912         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 913
 914         cod->cse = cse;
 915         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
 916                 if (aad_len != 0)
 917                         cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
 918                 cod->buf = malloc(len, M_XDATA, M_WAITOK);
 919         } else
 920                 cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
 921         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 922                 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
 923         return (cod);
 924 }
 925
 926 static void
 927 cod_free(struct cryptop_data *cod)
 928 {
 929
 930         free(cod->aad, M_XDATA);
 931         free(cod->obuf, M_XDATA);
 932         free(cod->buf, M_XDATA);
 933         free(cod, M_XDATA);
 934 }
 935
 936 static int
 937 cryptodev_cb(struct cryptop *crp)
 938 {
 939         struct cryptop_data *cod = crp->crp_opaque;
 940
 941         /*
 942          * Lock to ensure the wakeup() is not missed by the loops
 943          * waiting on cod->done in cryptodev_op() and
 944          * cryptodev_aead().
 945          */
 946         mtx_lock(&cod->cse->lock);
 947         cod->done = true;
 948         mtx_unlock(&cod->cse->lock);
 949         wakeup(cod);
 950         return (0);
 951 }
 952
 953 static int
 954 cryptodev_op(struct csession *cse, const struct crypt_op *cop,
 955     struct ucred *active_cred, struct thread *td)
 956 {
 957         struct cryptop_data *cod = NULL;
 958         struct cryptop *crp = NULL;
 959         char *dst;
 960         int error;
 961
 962         if (cop->len > 256*1024-4) {
 963                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 964                 return (E2BIG);
 965         }
 966
 967         if (cse->txform) {
 968                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 969                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 970                         return (EINVAL);
 971                 }
 972         }
 973
 974         if (cop->mac && cse->hashsize == 0) {
 975                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 976                 return (EINVAL);
 977         }
 978
 979         /*
 980          * The COP_F_CIPHER_FIRST flag predates explicit session
 981          * modes, but the only way it was used was for EtA so allow it
 982          * as long as it is consistent with EtA.
 983          */
 984         if (cop->flags & COP_F_CIPHER_FIRST) {
 985                 if (cop->op != COP_ENCRYPT) {
 986                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 987                         return (EINVAL);
 988                 }
 989         }
 990
 991         cod = cod_alloc(cse, 0, cop->len + cse->hashsize, td);
 992         dst = cop->dst;
 993
 994         crp = crypto_getreq(cse->cses, M_WAITOK);
 995
 996         error = copyin(cop->src, cod->buf, cop->len);
 997         if (error) {
 998                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 999                 goto bail;
1000         }
1001         crp->crp_payload_start = 0;
1002         crp->crp_payload_length = cop->len;
1003         if (cse->hashsize)
1004                 crp->crp_digest_start = cop->len;
1005
1006         switch (cse->mode) {
1007         case CSP_MODE_COMPRESS:
1008                 switch (cop->op) {
1009                 case COP_ENCRYPT:
1010                         crp->crp_op = CRYPTO_OP_COMPRESS;
1011                         break;
1012                 case COP_DECRYPT:
1013                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
1014                         break;
1015                 default:
1016                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1017                         error = EINVAL;
1018                         goto bail;
1019                 }
1020                 break;
1021         case CSP_MODE_CIPHER:
1022                 switch (cop->op) {
1023                 case COP_ENCRYPT:
1024                         crp->crp_op = CRYPTO_OP_ENCRYPT;
1025                         break;
1026                 case COP_DECRYPT:
1027                         crp->crp_op = CRYPTO_OP_DECRYPT;
1028                         break;
1029                 default:
1030                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1031                         error = EINVAL;
1032                         goto bail;
1033                 }
1034                 break;
1035         case CSP_MODE_DIGEST:
1036                 switch (cop->op) {
1037                 case 0:
1038                 case COP_ENCRYPT:
1039                 case COP_DECRYPT:
1040                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
1041                         if (cod->obuf != NULL)
1042                                 crp->crp_digest_start = 0;
1043                         break;
1044                 default:
1045                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1046                         error = EINVAL;
1047                         goto bail;
1048                 }
1049                 break;
1050         case CSP_MODE_ETA:
1051                 switch (cop->op) {
1052                 case COP_ENCRYPT:
1053                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1054                             CRYPTO_OP_COMPUTE_DIGEST;
1055                         break;
1056                 case COP_DECRYPT:
1057                         crp->crp_op = CRYPTO_OP_DECRYPT |
1058                             CRYPTO_OP_VERIFY_DIGEST;
1059                         break;
1060                 default:
1061                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1062                         error = EINVAL;
1063                         goto bail;
1064                 }
1065                 break;
1066         default:
1067                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1068                 error = EINVAL;
1069                 goto bail;
1070         }
1071
1072         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
1073         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
1074         if (cod->obuf)
1075                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
1076         crp->crp_callback = cryptodev_cb;
1077         crp->crp_opaque = cod;
1078
1079         if (cop->iv) {
1080                 if (cse->ivsize == 0) {
1081                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1082                         error = EINVAL;
1083                         goto bail;
1084                 }
1085                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
1086                 if (error) {
1087                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1088                         goto bail;
1089                 }
1090                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1091         } else if (cse->ivsize != 0) {
1092                 crp->crp_iv_start = 0;
1093                 crp->crp_payload_start += cse->ivsize;
1094                 crp->crp_payload_length -= cse->ivsize;
1095                 dst += cse->ivsize;
1096         }
1097
1098         if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1099                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
1100                     cse->hashsize);
1101                 if (error) {
1102                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1103                         goto bail;
1104                 }
1105         }
1106 again:
1107         /*
1108          * Let the dispatch run unlocked, then, interlock against the
1109          * callback before checking if the operation completed and going
1110          * to sleep.  This insures drivers don't inherit our lock which
1111          * results in a lock order reversal between crypto_dispatch forced
1112          * entry and the crypto_done callback into us.
1113          */
1114         error = crypto_dispatch(crp);
1115         if (error != 0) {
1116                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1117                 goto bail;
1118         }
1119
1120         mtx_lock(&cse->lock);
1121         while (!cod->done)
1122                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1123         mtx_unlock(&cse->lock);
1124
1125         if (crp->crp_etype == EAGAIN) {
1126                 crp->crp_etype = 0;
1127                 crp->crp_flags &= ~CRYPTO_F_DONE;
1128                 cod->done = false;
1129                 goto again;
1130         }
1131
1132         if (crp->crp_etype != 0) {
1133                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1134                 error = crp->crp_etype;
1135                 goto bail;
1136         }
1137
1138         if (cop->dst != NULL) {
1139                 error = copyout(cod->obuf != NULL ? cod->obuf :
1140                     cod->buf + crp->crp_payload_start, dst,
1141                     crp->crp_payload_length);
1142                 if (error) {
1143                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1144                         goto bail;
1145                 }
1146         }
1147
1148         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1149                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1150                     crp->crp_digest_start, cop->mac, cse->hashsize);
1151                 if (error) {
1152                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1153                         goto bail;
1154                 }
1155         }
1156
1157 bail:
1158         crypto_freereq(crp);
1159         cod_free(cod);
1160
1161         return (error);
1162 }
1163
1164 static int
1165 cryptodev_aead(struct csession *cse, struct crypt_aead *caead,
1166     struct ucred *active_cred, struct thread *td)
1167 {
1168         struct cryptop_data *cod = NULL;
1169         struct cryptop *crp = NULL;
1170         char *dst;
1171         int error;
1172
1173         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1174                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1175                 return (E2BIG);
1176         }
1177
1178         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1179             (caead->len % cse->txform->blocksize) != 0) {
1180                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1181                 return (EINVAL);
1182         }
1183
1184         /*
1185          * The COP_F_CIPHER_FIRST flag predates explicit session
1186          * modes, but the only way it was used was for EtA so allow it
1187          * as long as it is consistent with EtA.
1188          */
1189         if (caead->flags & COP_F_CIPHER_FIRST) {
1190                 if (caead->op != COP_ENCRYPT) {
1191                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1192                         return (EINVAL);
1193                 }
1194         }
1195
1196         cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize, td);
1197         dst = caead->dst;
1198
1199         crp = crypto_getreq(cse->cses, M_WAITOK);
1200
1201         if (cod->aad != NULL)
1202                 error = copyin(caead->aad, cod->aad, caead->aadlen);
1203         else
1204                 error = copyin(caead->aad, cod->buf, caead->aadlen);
1205         if (error) {
1206                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1207                 goto bail;
1208         }
1209         crp->crp_aad = cod->aad;
1210         crp->crp_aad_start = 0;
1211         crp->crp_aad_length = caead->aadlen;
1212
1213         if (cod->aad != NULL)
1214                 crp->crp_payload_start = 0;
1215         else
1216                 crp->crp_payload_start = caead->aadlen;
1217         error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1218             caead->len);
1219         if (error) {
1220                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1221                 goto bail;
1222         }
1223         crp->crp_payload_length = caead->len;
1224         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1225                 crp->crp_digest_start = crp->crp_payload_output_start +
1226                     caead->len;
1227         else
1228                 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1229
1230         switch (cse->mode) {
1231         case CSP_MODE_AEAD:
1232         case CSP_MODE_ETA:
1233                 switch (caead->op) {
1234                 case COP_ENCRYPT:
1235                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1236                             CRYPTO_OP_COMPUTE_DIGEST;
1237                         break;
1238                 case COP_DECRYPT:
1239                         crp->crp_op = CRYPTO_OP_DECRYPT |
1240                             CRYPTO_OP_VERIFY_DIGEST;
1241                         break;
1242                 default:
1243                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1244                         error = EINVAL;
1245                         goto bail;
1246                 }
1247                 break;
1248         default:
1249                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1250                 error = EINVAL;
1251                 goto bail;
1252         }
1253
1254         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1255         crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1256             cse->hashsize);
1257         if (cod->obuf != NULL)
1258                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1259                     cse->hashsize);
1260         crp->crp_callback = cryptodev_cb;
1261         crp->crp_opaque = cod;
1262
1263         if (caead->iv) {
1264                 /*
1265                  * Permit a 16-byte IV for AES-XTS, but only use the
1266                  * first 8 bytes as a block number.
1267                  */
1268                 if (cse->mode == CSP_MODE_ETA &&
1269                     caead->ivlen == AES_BLOCK_LEN &&
1270                     cse->ivsize == AES_XTS_IV_LEN)
1271                         caead->ivlen = AES_XTS_IV_LEN;
1272
1273                 if (caead->ivlen != cse->ivsize) {
1274                         error = EINVAL;
1275                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1276                         goto bail;
1277                 }
1278
1279                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1280                 if (error) {
1281                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1282                         goto bail;
1283                 }
1284                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1285         } else {
1286                 crp->crp_iv_start = crp->crp_payload_start;
1287                 crp->crp_payload_start += cse->ivsize;
1288                 crp->crp_payload_length -= cse->ivsize;
1289                 dst += cse->ivsize;
1290         }
1291
1292         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1293                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1294                     cse->hashsize);
1295                 if (error) {
1296                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1297                         goto bail;
1298                 }
1299         }
1300 again:
1301         /*
1302          * Let the dispatch run unlocked, then, interlock against the
1303          * callback before checking if the operation completed and going
1304          * to sleep.  This insures drivers don't inherit our lock which
1305          * results in a lock order reversal between crypto_dispatch forced
1306          * entry and the crypto_done callback into us.
1307          */
1308         error = crypto_dispatch(crp);
1309         if (error != 0) {
1310                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1311                 goto bail;
1312         }
1313
1314         mtx_lock(&cse->lock);
1315         while (!cod->done)
1316                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1317         mtx_unlock(&cse->lock);
1318
1319         if (crp->crp_etype == EAGAIN) {
1320                 crp->crp_etype = 0;
1321                 crp->crp_flags &= ~CRYPTO_F_DONE;
1322                 cod->done = false;
1323                 goto again;
1324         }
1325
1326         if (crp->crp_etype != 0) {
1327                 error = crp->crp_etype;
1328                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1329                 goto bail;
1330         }
1331
1332         if (caead->dst != NULL) {
1333                 error = copyout(cod->obuf != NULL ? cod->obuf :
1334                     cod->buf + crp->crp_payload_start, dst,
1335                     crp->crp_payload_length);
1336                 if (error) {
1337                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1338                         goto bail;
1339                 }
1340         }
1341
1342         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1343                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1344                     crp->crp_digest_start, caead->tag, cse->hashsize);
1345                 if (error) {
1346                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1347                         goto bail;
1348                 }
1349         }
1350
1351 bail:
1352         crypto_freereq(crp);
1353         cod_free(cod);
1354
1355         return (error);
1356 }
1357
1358 static void
1359 cryptodevkey_cb(struct cryptkop *krp)
1360 {
1361
1362         wakeup_one(krp);
1363 }
1364
1365 static int
1366 cryptodev_key(struct crypt_kop *kop)
1367 {
1368         struct cryptkop *krp = NULL;
1369         int error = EINVAL;
1370         int in, out, size, i;
1371
1372         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1373                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1374                 return (EFBIG);
1375         }
1376
1377         in = kop->crk_iparams;
1378         out = kop->crk_oparams;
1379         switch (kop->crk_op) {
1380         case CRK_MOD_EXP:
1381                 if (in == 3 && out == 1)
1382                         break;
1383                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1384                 return (EINVAL);
1385         case CRK_MOD_EXP_CRT:
1386                 if (in == 6 && out == 1)
1387                         break;
1388                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1389                 return (EINVAL);
1390         case CRK_DSA_SIGN:
1391                 if (in == 5 && out == 2)
1392                         break;
1393                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1394                 return (EINVAL);
1395         case CRK_DSA_VERIFY:
1396                 if (in == 7 && out == 0)
1397                         break;
1398                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1399                 return (EINVAL);
1400         case CRK_DH_COMPUTE_KEY:
1401                 if (in == 3 && out == 1)
1402                         break;
1403                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1404                 return (EINVAL);
1405         default:
1406                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1407                 return (EINVAL);
1408         }
1409
1410         krp = malloc(sizeof(*krp), M_XDATA, M_WAITOK | M_ZERO);
1411         krp->krp_op = kop->crk_op;
1412         krp->krp_status = kop->crk_status;
1413         krp->krp_iparams = kop->crk_iparams;
1414         krp->krp_oparams = kop->crk_oparams;
1415         krp->krp_crid = kop->crk_crid;
1416         krp->krp_status = 0;
1417         krp->krp_callback = cryptodevkey_cb;
1418
1419         for (i = 0; i < CRK_MAXPARAM; i++) {
1420                 if (kop->crk_param[i].crp_nbits > 65536) {
1421                         /* Limit is the same as in OpenBSD */
1422                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1423                         goto fail;
1424                 }
1425                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1426         }
1427         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1428                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1429                 if (size == 0)
1430                         continue;
1431                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1432                 if (i >= krp->krp_iparams)
1433                         continue;
1434                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1435                 if (error) {
1436                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1437                         goto fail;
1438                 }
1439         }
1440
1441         error = crypto_kdispatch(krp);
1442         if (error) {
1443                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1444                 goto fail;
1445         }
1446         error = tsleep(krp, PSOCK, "crydev", 0);
1447         if (error) {
1448                 /* XXX can this happen?  if so, how do we recover? */
1449                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1450                 goto fail;
1451         }
1452
1453         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1454         if (krp->krp_status != 0) {
1455                 error = krp->krp_status;
1456                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1457                 goto fail;
1458         }
1459
1460         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1461                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1462                 if (size == 0)
1463                         continue;
1464                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1465                 if (error) {
1466                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1467                         goto fail;
1468                 }
1469         }
1470
1471 fail:
1472         if (krp) {
1473                 kop->crk_status = krp->krp_status;
1474                 for (i = 0; i < CRK_MAXPARAM; i++) {
1475                         if (krp->krp_param[i].crp_p)
1476                                 free(krp->krp_param[i].crp_p, M_XDATA);
1477                 }
1478                 free(krp, M_XDATA);
1479         }
1480         return (error);
1481 }
1482
1483 static int
1484 cryptodev_find(struct crypt_find_op *find)
1485 {
1486         device_t dev;
1487         size_t fnlen = sizeof find->name;
1488
1489         if (find->crid != -1) {
1490                 dev = crypto_find_device_byhid(find->crid);
1491                 if (dev == NULL)
1492                         return (ENOENT);
1493                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1494                 find->name[fnlen - 1] = '\x0';
1495         } else {
1496                 find->name[fnlen - 1] = '\x0';
1497                 find->crid = crypto_find_driver(find->name);
1498                 if (find->crid == -1)
1499                         return (ENOENT);
1500         }
1501         return (0);
1502 }
1503
1504 /* ARGSUSED */
1505 static int
1506 cryptof_stat(struct file *fp, struct stat *sb, struct ucred *active_cred,
1507     struct thread *td)
1508 {
1509
1510         return (EOPNOTSUPP);
1511 }
1512
1513 /* ARGSUSED */
1514 static int
1515 cryptof_close(struct file *fp, struct thread *td)
1516 {
1517         struct fcrypt *fcr = fp->f_data;
1518         struct csession *cse;
1519
1520         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1521                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1522                 KASSERT(cse->refs == 1,
1523                     ("%s: crypto session %p with %d refs", __func__, cse,
1524                     cse->refs));
1525                 csefree(cse);
1526         }
1527         free(fcr, M_XDATA);
1528         fp->f_data = NULL;
1529         return 0;
1530 }
1531
1532 static int
1533 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif,
1534     struct filedesc *fdp)
1535 {
1536
1537         kif->kf_type = KF_TYPE_CRYPTO;
1538         return (0);
1539 }
1540
1541 static struct csession *
1542 csefind(struct fcrypt *fcr, u_int ses)
1543 {
1544         struct csession *cse;
1545
1546         mtx_lock(&fcr->lock);
1547         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1548                 if (cse->ses == ses) {
1549                         refcount_acquire(&cse->refs);
1550                         mtx_unlock(&fcr->lock);
1551                         return (cse);
1552                 }
1553         }
1554         mtx_unlock(&fcr->lock);
1555         return (NULL);
1556 }
1557
1558 static bool
1559 csedelete(struct fcrypt *fcr, u_int ses)
1560 {
1561         struct csession *cse;
1562
1563         mtx_lock(&fcr->lock);
1564         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1565                 if (cse->ses == ses) {
1566                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1567                         mtx_unlock(&fcr->lock);
1568                         csefree(cse);
1569                         return (true);
1570                 }
1571         }
1572         mtx_unlock(&fcr->lock);
1573         return (false);
1574 }
1575
1576 struct csession *
1577 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1578     struct crypto_session_params *csp, struct enc_xform *txform,
1579     void *key, struct auth_hash *thash, void *mackey)
1580 {
1581         struct csession *cse;
1582
1583         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1584         if (cse == NULL)
1585                 return NULL;
1586         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1587         refcount_init(&cse->refs, 1);
1588         cse->key = key;
1589         cse->mackey = mackey;
1590         cse->mode = csp->csp_mode;
1591         cse->cses = cses;
1592         cse->txform = txform;
1593         if (thash != NULL)
1594                 cse->hashsize = thash->hashsize;
1595         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1596                 cse->hashsize = AES_GMAC_HASH_LEN;
1597         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1598                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1599         cse->ivsize = csp->csp_ivlen;
1600         mtx_lock(&fcr->lock);
1601         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1602         cse->ses = fcr->sesn++;
1603         mtx_unlock(&fcr->lock);
1604         return (cse);
1605 }
1606
1607 static void
1608 csefree(struct csession *cse)
1609 {
1610
1611         if (!refcount_release(&cse->refs))
1612                 return;
1613         crypto_freesession(cse->cses);
1614         mtx_destroy(&cse->lock);
1615         if (cse->key)
1616                 free(cse->key, M_XDATA);
1617         if (cse->mackey)
1618                 free(cse->mackey, M_XDATA);
1619         free(cse, M_XDATA);
1620 }
1621
1622 static int
1623 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag,
1624     struct thread *td)
1625 {
1626         struct file *f;
1627         struct fcrypt *fcr;
1628         int fd, error;
1629
1630         switch (cmd) {
1631         case CRIOGET:
1632                 error = falloc_noinstall(td, &f);
1633                 if (error)
1634                         break;
1635
1636                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1637                 TAILQ_INIT(&fcr->csessions);
1638                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1639
1640                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1641                 error = finstall(td, f, &fd, 0, NULL);
1642                 if (error) {
1643                         mtx_destroy(&fcr->lock);
1644                         free(fcr, M_XDATA);
1645                 } else
1646                         *(uint32_t *)data = fd;
1647                 fdrop(f, td);
1648                 break;
1649         case CRIOFINDDEV:
1650                 error = cryptodev_find((struct crypt_find_op *)data);
1651                 break;
1652         case CRIOASYMFEAT:
1653                 error = crypto_getfeat((int *)data);
1654                 break;
1655         default:
1656                 error = EINVAL;
1657                 break;
1658         }
1659         return (error);
1660 }
1661
1662 static struct cdevsw crypto_cdevsw = {
1663         .d_version =    D_VERSION,
1664         .d_ioctl =      cryptoioctl,
1665         .d_name =       "crypto",
1666 };
1667 static struct cdev *crypto_dev;
1668
1669 /*
1670  * Initialization code, both for static and dynamic loading.
1671  */
1672 static int
1673 cryptodev_modevent(module_t mod, int type, void *unused)
1674 {
1675         switch (type) {
1676         case MOD_LOAD:
1677                 if (bootverbose)
1678                         printf("crypto: <crypto device>\n");
1679                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1680                                       UID_ROOT, GID_WHEEL, 0666,
1681                                       "crypto");
1682                 return 0;
1683         case MOD_UNLOAD:
1684                 /*XXX disallow if active sessions */
1685                 destroy_dev(crypto_dev);
1686                 return 0;
1687         }
1688         return EINVAL;
1689 }
1690
1691 static moduledata_t cryptodev_mod = {
1692         "cryptodev",
1693         cryptodev_modevent,
1694         0
1695 };
1696 MODULE_VERSION(cryptodev, 1);
1697 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1698 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1699 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);