sys/opencrypto/cryptodev.c

   1 /*      $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2001 Theo de Raadt
   5  * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
   6  * Copyright (c) 2014 The FreeBSD Foundation
   7  * All rights reserved.
   8  *
   9  * Portions of this software were developed by John-Mark Gurney
  10  * under sponsorship of the FreeBSD Foundation and
  11  * Rubicon Communications, LLC (Netgate).
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *   notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *   notice, this list of conditions and the following disclaimer in the
  21  *   documentation and/or other materials provided with the distribution.
  22  * 3. The name of the author may not be used to endorse or promote products
  23  *   derived from this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Effort sponsored in part by the Defense Advanced Research Projects
  37  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  38  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
  39  */
  40
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/malloc.h>
  47 #include <sys/mbuf.h>
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/file.h>
  52 #include <sys/filedesc.h>
  53 #include <sys/errno.h>
  54 #include <sys/random.h>
  55 #include <sys/conf.h>
  56 #include <sys/kernel.h>
  57 #include <sys/module.h>
  58 #include <sys/fcntl.h>
  59 #include <sys/bus.h>
  60 #include <sys/user.h>
  61 #include <sys/sdt.h>
  62
  63 #include <opencrypto/cryptodev.h>
  64 #include <opencrypto/xform.h>
  65
  66 SDT_PROVIDER_DECLARE(opencrypto);
  67
  68 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
  69
  70 #ifdef COMPAT_FREEBSD32
  71 #include <sys/mount.h>
  72 #include <compat/freebsd32/freebsd32.h>
  73
  74 struct session_op32 {
  75         u_int32_t       cipher;
  76         u_int32_t       mac;
  77         u_int32_t       keylen;
  78         u_int32_t       key;
  79         int             mackeylen;
  80         u_int32_t       mackey;
  81         u_int32_t       ses;
  82 };
  83
  84 struct session2_op32 {
  85         u_int32_t       cipher;
  86         u_int32_t       mac;
  87         u_int32_t       keylen;
  88         u_int32_t       key;
  89         int             mackeylen;
  90         u_int32_t       mackey;
  91         u_int32_t       ses;
  92         int             crid;
  93         int             pad[4];
  94 };
  95
  96 struct crypt_op32 {
  97         u_int32_t       ses;
  98         u_int16_t       op;
  99         u_int16_t       flags;
 100         u_int           len;
 101         u_int32_t       src, dst;
 102         u_int32_t       mac;
 103         u_int32_t       iv;
 104 };
 105
 106 struct crparam32 {
 107         u_int32_t       crp_p;
 108         u_int           crp_nbits;
 109 };
 110
 111 struct crypt_kop32 {
 112         u_int           crk_op;
 113         u_int           crk_status;
 114         u_short         crk_iparams;
 115         u_short         crk_oparams;
 116         u_int           crk_crid;
 117         struct crparam32        crk_param[CRK_MAXPARAM];
 118 };
 119
 120 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
 121 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
 122 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
 123 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
 124 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
 125
 126 static void
 127 session_op_from_32(const struct session_op32 *from, struct session_op *to)
 128 {
 129
 130         CP(*from, *to, cipher);
 131         CP(*from, *to, mac);
 132         CP(*from, *to, keylen);
 133         PTRIN_CP(*from, *to, key);
 134         CP(*from, *to, mackeylen);
 135         PTRIN_CP(*from, *to, mackey);
 136         CP(*from, *to, ses);
 137 }
 138
 139 static void
 140 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
 141 {
 142
 143         session_op_from_32((const struct session_op32 *)from,
 144             (struct session_op *)to);
 145         CP(*from, *to, crid);
 146 }
 147
 148 static void
 149 session_op_to_32(const struct session_op *from, struct session_op32 *to)
 150 {
 151
 152         CP(*from, *to, cipher);
 153         CP(*from, *to, mac);
 154         CP(*from, *to, keylen);
 155         PTROUT_CP(*from, *to, key);
 156         CP(*from, *to, mackeylen);
 157         PTROUT_CP(*from, *to, mackey);
 158         CP(*from, *to, ses);
 159 }
 160
 161 static void
 162 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
 163 {
 164
 165         session_op_to_32((const struct session_op *)from,
 166             (struct session_op32 *)to);
 167         CP(*from, *to, crid);
 168 }
 169
 170 static void
 171 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
 172 {
 173
 174         CP(*from, *to, ses);
 175         CP(*from, *to, op);
 176         CP(*from, *to, flags);
 177         CP(*from, *to, len);
 178         PTRIN_CP(*from, *to, src);
 179         PTRIN_CP(*from, *to, dst);
 180         PTRIN_CP(*from, *to, mac);
 181         PTRIN_CP(*from, *to, iv);
 182 }
 183
 184 static void
 185 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
 186 {
 187
 188         CP(*from, *to, ses);
 189         CP(*from, *to, op);
 190         CP(*from, *to, flags);
 191         CP(*from, *to, len);
 192         PTROUT_CP(*from, *to, src);
 193         PTROUT_CP(*from, *to, dst);
 194         PTROUT_CP(*from, *to, mac);
 195         PTROUT_CP(*from, *to, iv);
 196 }
 197
 198 static void
 199 crparam_from_32(const struct crparam32 *from, struct crparam *to)
 200 {
 201
 202         PTRIN_CP(*from, *to, crp_p);
 203         CP(*from, *to, crp_nbits);
 204 }
 205
 206 static void
 207 crparam_to_32(const struct crparam *from, struct crparam32 *to)
 208 {
 209
 210         PTROUT_CP(*from, *to, crp_p);
 211         CP(*from, *to, crp_nbits);
 212 }
 213
 214 static void
 215 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
 216 {
 217         int i;
 218
 219         CP(*from, *to, crk_op);
 220         CP(*from, *to, crk_status);
 221         CP(*from, *to, crk_iparams);
 222         CP(*from, *to, crk_oparams);
 223         CP(*from, *to, crk_crid);
 224         for (i = 0; i < CRK_MAXPARAM; i++)
 225                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
 226 }
 227
 228 static void
 229 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
 230 {
 231         int i;
 232
 233         CP(*from, *to, crk_op);
 234         CP(*from, *to, crk_status);
 235         CP(*from, *to, crk_iparams);
 236         CP(*from, *to, crk_oparams);
 237         CP(*from, *to, crk_crid);
 238         for (i = 0; i < CRK_MAXPARAM; i++)
 239                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
 240 }
 241 #endif
 242
 243 struct csession {
 244         TAILQ_ENTRY(csession) next;
 245         crypto_session_t cses;
 246         volatile u_int  refs;
 247         u_int32_t       ses;
 248         struct mtx      lock;           /* for op submission */
 249
 250         struct enc_xform *txform;
 251         int             hashsize;
 252         int             ivsize;
 253         int             mode;
 254
 255         void            *key;
 256         void            *mackey;
 257 };
 258
 259 struct cryptop_data {
 260         struct csession *cse;
 261
 262         char            *buf;
 263         char            *obuf;
 264         char            *aad;
 265         bool            done;
 266 };
 267
 268 struct fcrypt {
 269         TAILQ_HEAD(csessionlist, csession) csessions;
 270         int             sesn;
 271         struct mtx      lock;
 272 };
 273
 274 static bool use_outputbuffers;
 275 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
 276     &use_outputbuffers, 0,
 277     "Use separate output buffers for /dev/crypto requests.");
 278
 279 static bool use_separate_aad;
 280 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
 281     &use_separate_aad, 0,
 282     "Use separate AAD buffer for /dev/crypto requests.");
 283
 284 static  int cryptof_ioctl(struct file *, u_long, void *,
 285                     struct ucred *, struct thread *);
 286 static  int cryptof_stat(struct file *, struct stat *,
 287                     struct ucred *, struct thread *);
 288 static  int cryptof_close(struct file *, struct thread *);
 289 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
 290                     struct filedesc *);
 291
 292 static struct fileops cryptofops = {
 293     .fo_read = invfo_rdwr,
 294     .fo_write = invfo_rdwr,
 295     .fo_truncate = invfo_truncate,
 296     .fo_ioctl = cryptof_ioctl,
 297     .fo_poll = invfo_poll,
 298     .fo_kqfilter = invfo_kqfilter,
 299     .fo_stat = cryptof_stat,
 300     .fo_close = cryptof_close,
 301     .fo_chmod = invfo_chmod,
 302     .fo_chown = invfo_chown,
 303     .fo_sendfile = invfo_sendfile,
 304     .fo_fill_kinfo = cryptof_fill_kinfo,
 305 };
 306
 307 static struct csession *csefind(struct fcrypt *, u_int);
 308 static bool csedelete(struct fcrypt *, u_int);
 309 static struct csession *csecreate(struct fcrypt *, crypto_session_t,
 310     struct crypto_session_params *, struct enc_xform *, void *,
 311     struct auth_hash *, void *);
 312 static void csefree(struct csession *);
 313
 314 static  int cryptodev_op(struct csession *, struct crypt_op *,
 315                         struct ucred *, struct thread *td);
 316 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
 317                         struct ucred *, struct thread *);
 318 static  int cryptodev_key(struct crypt_kop *);
 319 static  int cryptodev_find(struct crypt_find_op *);
 320
 321 /*
 322  * Check a crypto identifier to see if it requested
 323  * a software device/driver.  This can be done either
 324  * by device name/class or through search constraints.
 325  */
 326 static int
 327 checkforsoftware(int *cridp)
 328 {
 329         int crid;
 330
 331         crid = *cridp;
 332
 333         if (!crypto_devallowsoft) {
 334                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 335                         if (crid & CRYPTOCAP_F_HARDWARE) {
 336                                 *cridp = CRYPTOCAP_F_HARDWARE;
 337                                 return 0;
 338                         }
 339                         return EINVAL;
 340                 }
 341                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 342                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 343                         return EINVAL;
 344         }
 345         return 0;
 346 }
 347
 348 /* ARGSUSED */
 349 static int
 350 cryptof_ioctl(
 351         struct file *fp,
 352         u_long cmd,
 353         void *data,
 354         struct ucred *active_cred,
 355         struct thread *td)
 356 {
 357 #define SES2(p) ((struct session2_op *)p)
 358         struct crypto_session_params csp;
 359         struct fcrypt *fcr = fp->f_data;
 360         struct csession *cse;
 361         struct session_op *sop;
 362         struct crypt_op *cop;
 363         struct crypt_aead *caead;
 364         struct enc_xform *txform = NULL;
 365         struct auth_hash *thash = NULL;
 366         void *key = NULL;
 367         void *mackey = NULL;
 368         struct crypt_kop *kop;
 369         crypto_session_t cses;
 370         u_int32_t ses;
 371         int error = 0, crid;
 372 #ifdef COMPAT_FREEBSD32
 373         struct session2_op sopc;
 374         struct crypt_op copc;
 375         struct crypt_kop kopc;
 376 #endif
 377
 378         switch (cmd) {
 379         case CIOCGSESSION:
 380         case CIOCGSESSION2:
 381 #ifdef COMPAT_FREEBSD32
 382         case CIOCGSESSION32:
 383         case CIOCGSESSION232:
 384                 if (cmd == CIOCGSESSION32) {
 385                         session_op_from_32(data, (struct session_op *)&sopc);
 386                         sop = (struct session_op *)&sopc;
 387                 } else if (cmd == CIOCGSESSION232) {
 388                         session2_op_from_32(data, &sopc);
 389                         sop = (struct session_op *)&sopc;
 390                 } else
 391 #endif
 392                         sop = (struct session_op *)data;
 393                 switch (sop->cipher) {
 394                 case 0:
 395                         break;
 396                 case CRYPTO_AES_CBC:
 397                         txform = &enc_xform_rijndael128;
 398                         break;
 399                 case CRYPTO_AES_XTS:
 400                         txform = &enc_xform_aes_xts;
 401                         break;
 402                 case CRYPTO_NULL_CBC:
 403                         txform = &enc_xform_null;
 404                         break;
 405                 case CRYPTO_CAMELLIA_CBC:
 406                         txform = &enc_xform_camellia;
 407                         break;
 408                 case CRYPTO_AES_ICM:
 409                         txform = &enc_xform_aes_icm;
 410                         break;
 411                 case CRYPTO_AES_NIST_GCM_16:
 412                         txform = &enc_xform_aes_nist_gcm;
 413                         break;
 414                 case CRYPTO_CHACHA20:
 415                         txform = &enc_xform_chacha20;
 416                         break;
 417                 case CRYPTO_AES_CCM_16:
 418                         txform = &enc_xform_ccm;
 419                         break;
 420
 421                 default:
 422                         CRYPTDEB("invalid cipher");
 423                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 424                         return (EINVAL);
 425                 }
 426
 427                 switch (sop->mac) {
 428                 case 0:
 429                         break;
 430                 case CRYPTO_POLY1305:
 431                         thash = &auth_hash_poly1305;
 432                         break;
 433                 case CRYPTO_SHA1_HMAC:
 434                         thash = &auth_hash_hmac_sha1;
 435                         break;
 436                 case CRYPTO_SHA2_224_HMAC:
 437                         thash = &auth_hash_hmac_sha2_224;
 438                         break;
 439                 case CRYPTO_SHA2_256_HMAC:
 440                         thash = &auth_hash_hmac_sha2_256;
 441                         break;
 442                 case CRYPTO_SHA2_384_HMAC:
 443                         thash = &auth_hash_hmac_sha2_384;
 444                         break;
 445                 case CRYPTO_SHA2_512_HMAC:
 446                         thash = &auth_hash_hmac_sha2_512;
 447                         break;
 448                 case CRYPTO_RIPEMD160_HMAC:
 449                         thash = &auth_hash_hmac_ripemd_160;
 450                         break;
 451 #ifdef COMPAT_FREEBSD12
 452                 case CRYPTO_AES_128_NIST_GMAC:
 453                 case CRYPTO_AES_192_NIST_GMAC:
 454                 case CRYPTO_AES_256_NIST_GMAC:
 455                         /* Should always be paired with GCM. */
 456                         if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 457                                 CRYPTDEB("GMAC without GCM");
 458                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 459                                     __LINE__);
 460                                 return (EINVAL);
 461                         }
 462                         break;
 463 #endif
 464                 case CRYPTO_AES_NIST_GMAC:
 465                         switch (sop->mackeylen * 8) {
 466                         case 128:
 467                                 thash = &auth_hash_nist_gmac_aes_128;
 468                                 break;
 469                         case 192:
 470                                 thash = &auth_hash_nist_gmac_aes_192;
 471                                 break;
 472                         case 256:
 473                                 thash = &auth_hash_nist_gmac_aes_256;
 474                                 break;
 475                         default:
 476                                 CRYPTDEB("invalid GMAC key length");
 477                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 478                                     __LINE__);
 479                                 return (EINVAL);
 480                         }
 481                         break;
 482                 case CRYPTO_AES_CCM_CBC_MAC:
 483                         switch (sop->mackeylen) {
 484                         case 16:
 485                                 thash = &auth_hash_ccm_cbc_mac_128;
 486                                 break;
 487                         case 24:
 488                                 thash = &auth_hash_ccm_cbc_mac_192;
 489                                 break;
 490                         case 32:
 491                                 thash = &auth_hash_ccm_cbc_mac_256;
 492                                 break;
 493                         default:
 494                                 CRYPTDEB("Invalid CBC MAC key size %d",
 495                                     sop->keylen);
 496                                 SDT_PROBE1(opencrypto, dev, ioctl,
 497                                     error, __LINE__);
 498                                 return (EINVAL);
 499                         }
 500                         break;
 501                 case CRYPTO_SHA1:
 502                         thash = &auth_hash_sha1;
 503                         break;
 504                 case CRYPTO_SHA2_224:
 505                         thash = &auth_hash_sha2_224;
 506                         break;
 507                 case CRYPTO_SHA2_256:
 508                         thash = &auth_hash_sha2_256;
 509                         break;
 510                 case CRYPTO_SHA2_384:
 511                         thash = &auth_hash_sha2_384;
 512                         break;
 513                 case CRYPTO_SHA2_512:
 514                         thash = &auth_hash_sha2_512;
 515                         break;
 516
 517                 case CRYPTO_NULL_HMAC:
 518                         thash = &auth_hash_null;
 519                         break;
 520
 521                 case CRYPTO_BLAKE2B:
 522                         thash = &auth_hash_blake2b;
 523                         break;
 524                 case CRYPTO_BLAKE2S:
 525                         thash = &auth_hash_blake2s;
 526                         break;
 527
 528                 default:
 529                         CRYPTDEB("invalid mac");
 530                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 531                         return (EINVAL);
 532                 }
 533
 534                 if (txform == NULL && thash == NULL) {
 535                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 536                         return (EINVAL);
 537                 }
 538
 539                 memset(&csp, 0, sizeof(csp));
 540                 if (use_outputbuffers)
 541                         csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 542
 543                 if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 544                         switch (sop->mac) {
 545 #ifdef COMPAT_FREEBSD12
 546                         case CRYPTO_AES_128_NIST_GMAC:
 547                         case CRYPTO_AES_192_NIST_GMAC:
 548                         case CRYPTO_AES_256_NIST_GMAC:
 549                                 if (sop->keylen != sop->mackeylen) {
 550                                         SDT_PROBE1(opencrypto, dev, ioctl,
 551                                             error, __LINE__);
 552                                         return (EINVAL);
 553                                 }
 554                                 break;
 555 #endif
 556                         case 0:
 557                                 break;
 558                         default:
 559                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 560                                     __LINE__);
 561                                 return (EINVAL);
 562                         }
 563                         csp.csp_mode = CSP_MODE_AEAD;
 564                 } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 565                         switch (sop->mac) {
 566 #ifdef COMPAT_FREEBSD12
 567                         case CRYPTO_AES_CCM_CBC_MAC:
 568                                 if (sop->keylen != sop->mackeylen) {
 569                                         SDT_PROBE1(opencrypto, dev, ioctl,
 570                                             error, __LINE__);
 571                                         return (EINVAL);
 572                                 }
 573                                 thash = NULL;
 574                                 break;
 575 #endif
 576                         case 0:
 577                                 break;
 578                         default:
 579                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 580                                     __LINE__);
 581                                 return (EINVAL);
 582                         }
 583                         csp.csp_mode = CSP_MODE_AEAD;
 584                 } else if (txform && thash)
 585                         csp.csp_mode = CSP_MODE_ETA;
 586                 else if (txform)
 587                         csp.csp_mode = CSP_MODE_CIPHER;
 588                 else
 589                         csp.csp_mode = CSP_MODE_DIGEST;
 590
 591                 switch (csp.csp_mode) {
 592                 case CSP_MODE_AEAD:
 593                 case CSP_MODE_ETA:
 594                         if (use_separate_aad)
 595                                 csp.csp_flags |= CSP_F_SEPARATE_AAD;
 596                         break;
 597                 }
 598
 599                 if (txform) {
 600                         csp.csp_cipher_alg = txform->type;
 601                         csp.csp_cipher_klen = sop->keylen;
 602                         if (sop->keylen > txform->maxkey ||
 603                             sop->keylen < txform->minkey) {
 604                                 CRYPTDEB("invalid cipher parameters");
 605                                 error = EINVAL;
 606                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 607                                     __LINE__);
 608                                 goto bail;
 609                         }
 610
 611                         key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
 612                         error = copyin(sop->key, key, csp.csp_cipher_klen);
 613                         if (error) {
 614                                 CRYPTDEB("invalid key");
 615                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 616                                     __LINE__);
 617                                 goto bail;
 618                         }
 619                         csp.csp_cipher_key = key;
 620                         csp.csp_ivlen = txform->ivsize;
 621                 }
 622
 623                 if (thash) {
 624                         csp.csp_auth_alg = thash->type;
 625                         csp.csp_auth_klen = sop->mackeylen;
 626                         if (sop->mackeylen > thash->keysize ||
 627                             sop->mackeylen < 0) {
 628                                 CRYPTDEB("invalid mac key length");
 629                                 error = EINVAL;
 630                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 631                                     __LINE__);
 632                                 goto bail;
 633                         }
 634
 635                         if (csp.csp_auth_klen) {
 636                                 mackey = malloc(csp.csp_auth_klen, M_XDATA,
 637                                     M_WAITOK);
 638                                 error = copyin(sop->mackey, mackey,
 639                                     csp.csp_auth_klen);
 640                                 if (error) {
 641                                         CRYPTDEB("invalid mac key");
 642                                         SDT_PROBE1(opencrypto, dev, ioctl,
 643                                             error, __LINE__);
 644                                         goto bail;
 645                                 }
 646                                 csp.csp_auth_key = mackey;
 647                         }
 648
 649                         if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 650                                 csp.csp_ivlen = AES_GCM_IV_LEN;
 651                         if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 652                                 csp.csp_ivlen = AES_CCM_IV_LEN;
 653                 }
 654
 655                 /* NB: CIOCGSESSION2 has the crid */
 656                 if (cmd == CIOCGSESSION2
 657 #ifdef COMPAT_FREEBSD32
 658                     || cmd == CIOCGSESSION232
 659 #endif
 660                         ) {
 661                         crid = SES2(sop)->crid;
 662                         error = checkforsoftware(&crid);
 663                         if (error) {
 664                                 CRYPTDEB("checkforsoftware");
 665                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 666                                     __LINE__);
 667                                 goto bail;
 668                         }
 669                 } else
 670                         crid = CRYPTOCAP_F_HARDWARE;
 671                 error = crypto_newsession(&cses, &csp, crid);
 672                 if (error) {
 673                         CRYPTDEB("crypto_newsession");
 674                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 675                         goto bail;
 676                 }
 677
 678                 cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
 679
 680                 if (cse == NULL) {
 681                         crypto_freesession(cses);
 682                         error = EINVAL;
 683                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 684                         CRYPTDEB("csecreate");
 685                         goto bail;
 686                 }
 687                 sop->ses = cse->ses;
 688                 if (cmd == CIOCGSESSION2
 689 #ifdef COMPAT_FREEBSD32
 690                     || cmd == CIOCGSESSION232
 691 #endif
 692                     ) {
 693                         /* return hardware/driver id */
 694                         SES2(sop)->crid = crypto_ses2hid(cse->cses);
 695                 }
 696 bail:
 697                 if (error) {
 698                         free(key, M_XDATA);
 699                         free(mackey, M_XDATA);
 700                 }
 701 #ifdef COMPAT_FREEBSD32
 702                 else {
 703                         if (cmd == CIOCGSESSION32)
 704                                 session_op_to_32(sop, data);
 705                         else if (cmd == CIOCGSESSION232)
 706                                 session2_op_to_32((struct session2_op *)sop,
 707                                     data);
 708                 }
 709 #endif
 710                 break;
 711         case CIOCFSESSION:
 712                 ses = *(u_int32_t *)data;
 713                 if (!csedelete(fcr, ses)) {
 714                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 715                         return (EINVAL);
 716                 }
 717                 break;
 718         case CIOCCRYPT:
 719 #ifdef COMPAT_FREEBSD32
 720         case CIOCCRYPT32:
 721                 if (cmd == CIOCCRYPT32) {
 722                         cop = &copc;
 723                         crypt_op_from_32(data, cop);
 724                 } else
 725 #endif
 726                         cop = (struct crypt_op *)data;
 727                 cse = csefind(fcr, cop->ses);
 728                 if (cse == NULL) {
 729                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 730                         return (EINVAL);
 731                 }
 732                 error = cryptodev_op(cse, cop, active_cred, td);
 733                 csefree(cse);
 734 #ifdef COMPAT_FREEBSD32
 735                 if (error == 0 && cmd == CIOCCRYPT32)
 736                         crypt_op_to_32(cop, data);
 737 #endif
 738                 break;
 739         case CIOCKEY:
 740         case CIOCKEY2:
 741 #ifdef COMPAT_FREEBSD32
 742         case CIOCKEY32:
 743         case CIOCKEY232:
 744 #endif
 745                 if (!crypto_userasymcrypto) {
 746                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 747                         return (EPERM);         /* XXX compat? */
 748                 }
 749 #ifdef COMPAT_FREEBSD32
 750                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
 751                         kop = &kopc;
 752                         crypt_kop_from_32(data, kop);
 753                 } else
 754 #endif
 755                         kop = (struct crypt_kop *)data;
 756                 if (cmd == CIOCKEY
 757 #ifdef COMPAT_FREEBSD32
 758                     || cmd == CIOCKEY32
 759 #endif
 760                     ) {
 761                         /* NB: crypto core enforces s/w driver use */
 762                         kop->crk_crid =
 763                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
 764                 }
 765                 mtx_lock(&Giant);
 766                 error = cryptodev_key(kop);
 767                 mtx_unlock(&Giant);
 768 #ifdef COMPAT_FREEBSD32
 769                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
 770                         crypt_kop_to_32(kop, data);
 771 #endif
 772                 break;
 773         case CIOCASYMFEAT:
 774                 if (!crypto_userasymcrypto) {
 775                         /*
 776                          * NB: if user asym crypto operations are
 777                          * not permitted return "no algorithms"
 778                          * so well-behaved applications will just
 779                          * fallback to doing them in software.
 780                          */
 781                         *(int *)data = 0;
 782                 } else {
 783                         error = crypto_getfeat((int *)data);
 784                         if (error)
 785                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 786                                     __LINE__);
 787                 }
 788                 break;
 789         case CIOCFINDDEV:
 790                 error = cryptodev_find((struct crypt_find_op *)data);
 791                 break;
 792         case CIOCCRYPTAEAD:
 793                 caead = (struct crypt_aead *)data;
 794                 cse = csefind(fcr, caead->ses);
 795                 if (cse == NULL) {
 796                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 797                         return (EINVAL);
 798                 }
 799                 error = cryptodev_aead(cse, caead, active_cred, td);
 800                 csefree(cse);
 801                 break;
 802         default:
 803                 error = EINVAL;
 804                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 805                 break;
 806         }
 807         return (error);
 808 #undef SES2
 809 }
 810
 811 static int cryptodev_cb(struct cryptop *);
 812
 813 static struct cryptop_data *
 814 cod_alloc(struct csession *cse, size_t aad_len, size_t len, struct thread *td)
 815 {
 816         struct cryptop_data *cod;
 817
 818         cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
 819
 820         cod->cse = cse;
 821         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
 822                 if (aad_len != 0)
 823                         cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
 824                 cod->buf = malloc(len, M_XDATA, M_WAITOK);
 825         } else
 826                 cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
 827         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 828                 cod->obuf = malloc(len, M_XDATA, M_WAITOK);
 829         return (cod);
 830 }
 831
 832 static void
 833 cod_free(struct cryptop_data *cod)
 834 {
 835
 836         free(cod->aad, M_XDATA);
 837         free(cod->obuf, M_XDATA);
 838         free(cod->buf, M_XDATA);
 839         free(cod, M_XDATA);
 840 }
 841
 842 static int
 843 cryptodev_op(
 844         struct csession *cse,
 845         struct crypt_op *cop,
 846         struct ucred *active_cred,
 847         struct thread *td)
 848 {
 849         struct cryptop_data *cod = NULL;
 850         struct cryptop *crp = NULL;
 851         int error;
 852
 853         if (cop->len > 256*1024-4) {
 854                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 855                 return (E2BIG);
 856         }
 857
 858         if (cse->txform) {
 859                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
 860                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 861                         return (EINVAL);
 862                 }
 863         }
 864
 865         if (cop->mac && cse->hashsize == 0) {
 866                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 867                 return (EINVAL);
 868         }
 869
 870         /*
 871          * The COP_F_CIPHER_FIRST flag predates explicit session
 872          * modes, but the only way it was used was for EtA so allow it
 873          * as long as it is consistent with EtA.
 874          */
 875         if (cop->flags & COP_F_CIPHER_FIRST) {
 876                 if (cop->op != COP_ENCRYPT) {
 877                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 878                         return (EINVAL);
 879                 }
 880         }
 881
 882         cod = cod_alloc(cse, 0, cop->len + cse->hashsize, td);
 883
 884         crp = crypto_getreq(cse->cses, M_WAITOK);
 885
 886         error = copyin(cop->src, cod->buf, cop->len);
 887         if (error) {
 888                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 889                 goto bail;
 890         }
 891         crp->crp_payload_start = 0;
 892         crp->crp_payload_length = cop->len;
 893         if (cse->hashsize)
 894                 crp->crp_digest_start = cop->len;
 895
 896         switch (cse->mode) {
 897         case CSP_MODE_COMPRESS:
 898                 switch (cop->op) {
 899                 case COP_ENCRYPT:
 900                         crp->crp_op = CRYPTO_OP_COMPRESS;
 901                         break;
 902                 case COP_DECRYPT:
 903                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 904                         break;
 905                 default:
 906                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 907                         error = EINVAL;
 908                         goto bail;
 909                 }
 910                 break;
 911         case CSP_MODE_CIPHER:
 912                 switch (cop->op) {
 913                 case COP_ENCRYPT:
 914                         crp->crp_op = CRYPTO_OP_ENCRYPT;
 915                         break;
 916                 case COP_DECRYPT:
 917                         crp->crp_op = CRYPTO_OP_DECRYPT;
 918                         break;
 919                 default:
 920                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 921                         error = EINVAL;
 922                         goto bail;
 923                 }
 924                 break;
 925         case CSP_MODE_DIGEST:
 926                 switch (cop->op) {
 927                 case 0:
 928                 case COP_ENCRYPT:
 929                 case COP_DECRYPT:
 930                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
 931                         if (cod->obuf != NULL)
 932                                 crp->crp_digest_start = 0;
 933                         break;
 934                 default:
 935                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 936                         error = EINVAL;
 937                         goto bail;
 938                 }
 939                 break;
 940         case CSP_MODE_ETA:
 941                 switch (cop->op) {
 942                 case COP_ENCRYPT:
 943                         crp->crp_op = CRYPTO_OP_ENCRYPT |
 944                             CRYPTO_OP_COMPUTE_DIGEST;
 945                         break;
 946                 case COP_DECRYPT:
 947                         crp->crp_op = CRYPTO_OP_DECRYPT |
 948                             CRYPTO_OP_VERIFY_DIGEST;
 949                         break;
 950                 default:
 951                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 952                         error = EINVAL;
 953                         goto bail;
 954                 }
 955                 break;
 956         default:
 957                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 958                 error = EINVAL;
 959                 goto bail;
 960         }
 961
 962         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
 963         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
 964         if (cod->obuf)
 965                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
 966         crp->crp_callback = cryptodev_cb;
 967         crp->crp_opaque = cod;
 968
 969         if (cop->iv) {
 970                 if (cse->ivsize == 0) {
 971                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 972                         error = EINVAL;
 973                         goto bail;
 974                 }
 975                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
 976                 if (error) {
 977                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 978                         goto bail;
 979                 }
 980                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
 981         } else if (cse->ivsize != 0) {
 982                 crp->crp_iv_start = 0;
 983                 crp->crp_payload_start += cse->ivsize;
 984                 crp->crp_payload_length -= cse->ivsize;
 985                 cop->dst += cse->ivsize;
 986         }
 987
 988         if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
 989                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
 990                     cse->hashsize);
 991                 if (error) {
 992                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 993                         goto bail;
 994                 }
 995         }
 996 again:
 997         /*
 998          * Let the dispatch run unlocked, then, interlock against the
 999          * callback before checking if the operation completed and going
1000          * to sleep.  This insures drivers don't inherit our lock which
1001          * results in a lock order reversal between crypto_dispatch forced
1002          * entry and the crypto_done callback into us.
1003          */
1004         error = crypto_dispatch(crp);
1005         if (error != 0) {
1006                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1007                 goto bail;
1008         }
1009
1010         mtx_lock(&cse->lock);
1011         while (!cod->done)
1012                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1013         mtx_unlock(&cse->lock);
1014
1015         if (crp->crp_etype == EAGAIN) {
1016                 crp->crp_etype = 0;
1017                 crp->crp_flags &= ~CRYPTO_F_DONE;
1018                 cod->done = false;
1019                 goto again;
1020         }
1021
1022         if (crp->crp_etype != 0) {
1023                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1024                 error = crp->crp_etype;
1025                 goto bail;
1026         }
1027
1028         if (cop->dst != NULL) {
1029                 error = copyout(cod->obuf != NULL ? cod->obuf :
1030                     cod->buf + crp->crp_payload_start, cop->dst,
1031                     crp->crp_payload_length);
1032                 if (error) {
1033                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1034                         goto bail;
1035                 }
1036         }
1037
1038         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1039                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1040                     crp->crp_digest_start, cop->mac, cse->hashsize);
1041                 if (error) {
1042                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1043                         goto bail;
1044                 }
1045         }
1046
1047 bail:
1048         crypto_freereq(crp);
1049         cod_free(cod);
1050
1051         return (error);
1052 }
1053
1054 static int
1055 cryptodev_aead(
1056         struct csession *cse,
1057         struct crypt_aead *caead,
1058         struct ucred *active_cred,
1059         struct thread *td)
1060 {
1061         struct cryptop_data *cod = NULL;
1062         struct cryptop *crp = NULL;
1063         int error;
1064
1065         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1066                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1067                 return (E2BIG);
1068         }
1069
1070         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1071             (caead->len % cse->txform->blocksize) != 0) {
1072                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1073                 return (EINVAL);
1074         }
1075
1076         /*
1077          * The COP_F_CIPHER_FIRST flag predates explicit session
1078          * modes, but the only way it was used was for EtA so allow it
1079          * as long as it is consistent with EtA.
1080          */
1081         if (caead->flags & COP_F_CIPHER_FIRST) {
1082                 if (caead->op != COP_ENCRYPT) {
1083                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1084                         return (EINVAL);
1085                 }
1086         }
1087
1088         cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize, td);
1089
1090         crp = crypto_getreq(cse->cses, M_WAITOK);
1091
1092         if (cod->aad != NULL)
1093                 error = copyin(caead->aad, cod->aad, caead->aadlen);
1094         else
1095                 error = copyin(caead->aad, cod->buf, caead->aadlen);
1096         if (error) {
1097                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1098                 goto bail;
1099         }
1100         crp->crp_aad = cod->aad;
1101         crp->crp_aad_start = 0;
1102         crp->crp_aad_length = caead->aadlen;
1103
1104         if (cod->aad != NULL)
1105                 crp->crp_payload_start = 0;
1106         else
1107                 crp->crp_payload_start = caead->aadlen;
1108         error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1109             caead->len);
1110         if (error) {
1111                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1112                 goto bail;
1113         }
1114         crp->crp_payload_length = caead->len;
1115         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1116                 crp->crp_digest_start = crp->crp_payload_output_start +
1117                     caead->len;
1118         else
1119                 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1120
1121         switch (cse->mode) {
1122         case CSP_MODE_AEAD:
1123         case CSP_MODE_ETA:
1124                 switch (caead->op) {
1125                 case COP_ENCRYPT:
1126                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1127                             CRYPTO_OP_COMPUTE_DIGEST;
1128                         break;
1129                 case COP_DECRYPT:
1130                         crp->crp_op = CRYPTO_OP_DECRYPT |
1131                             CRYPTO_OP_VERIFY_DIGEST;
1132                         break;
1133                 default:
1134                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1135                         error = EINVAL;
1136                         goto bail;
1137                 }
1138                 break;
1139         default:
1140                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1141                 error = EINVAL;
1142                 goto bail;
1143         }
1144
1145         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1146         crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1147             cse->hashsize);
1148         if (cod->obuf != NULL)
1149                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1150                     cse->hashsize);
1151         crp->crp_callback = cryptodev_cb;
1152         crp->crp_opaque = cod;
1153
1154         if (caead->iv) {
1155                 /*
1156                  * Permit a 16-byte IV for AES-XTS, but only use the
1157                  * first 8 bytes as a block number.
1158                  */
1159                 if (cse->mode == CSP_MODE_ETA &&
1160                     caead->ivlen == AES_BLOCK_LEN &&
1161                     cse->ivsize == AES_XTS_IV_LEN)
1162                         caead->ivlen = AES_XTS_IV_LEN;
1163
1164                 if (caead->ivlen != cse->ivsize) {
1165                         error = EINVAL;
1166                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1167                         goto bail;
1168                 }
1169
1170                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1171                 if (error) {
1172                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1173                         goto bail;
1174                 }
1175                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1176         } else {
1177                 crp->crp_iv_start = crp->crp_payload_start;
1178                 crp->crp_payload_start += cse->ivsize;
1179                 crp->crp_payload_length -= cse->ivsize;
1180                 caead->dst += cse->ivsize;
1181         }
1182
1183         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1184                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1185                     cse->hashsize);
1186                 if (error) {
1187                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1188                         goto bail;
1189                 }
1190         }
1191 again:
1192         /*
1193          * Let the dispatch run unlocked, then, interlock against the
1194          * callback before checking if the operation completed and going
1195          * to sleep.  This insures drivers don't inherit our lock which
1196          * results in a lock order reversal between crypto_dispatch forced
1197          * entry and the crypto_done callback into us.
1198          */
1199         error = crypto_dispatch(crp);
1200         if (error != 0) {
1201                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1202                 goto bail;
1203         }
1204
1205         mtx_lock(&cse->lock);
1206         while (!cod->done)
1207                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1208         mtx_unlock(&cse->lock);
1209
1210         if (crp->crp_etype == EAGAIN) {
1211                 crp->crp_etype = 0;
1212                 crp->crp_flags &= ~CRYPTO_F_DONE;
1213                 cod->done = false;
1214                 goto again;
1215         }
1216
1217         if (crp->crp_etype != 0) {
1218                 error = crp->crp_etype;
1219                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1220                 goto bail;
1221         }
1222
1223         if (caead->dst != NULL) {
1224                 error = copyout(cod->obuf != NULL ? cod->obuf :
1225                     cod->buf + crp->crp_payload_start, caead->dst,
1226                     crp->crp_payload_length);
1227                 if (error) {
1228                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1229                         goto bail;
1230                 }
1231         }
1232
1233         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1234                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1235                     crp->crp_digest_start, caead->tag, cse->hashsize);
1236                 if (error) {
1237                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1238                         goto bail;
1239                 }
1240         }
1241
1242 bail:
1243         crypto_freereq(crp);
1244         cod_free(cod);
1245
1246         return (error);
1247 }
1248
1249 static int
1250 cryptodev_cb(struct cryptop *crp)
1251 {
1252         struct cryptop_data *cod = crp->crp_opaque;
1253
1254         /*
1255          * Lock to ensure the wakeup() is not missed by the loops
1256          * waiting on cod->done in cryptodev_op() and
1257          * cryptodev_aead().
1258          */
1259         mtx_lock(&cod->cse->lock);
1260         cod->done = true;
1261         mtx_unlock(&cod->cse->lock);
1262         wakeup(cod);
1263         return (0);
1264 }
1265
1266 static void
1267 cryptodevkey_cb(struct cryptkop *krp)
1268 {
1269
1270         wakeup_one(krp);
1271 }
1272
1273 static int
1274 cryptodev_key(struct crypt_kop *kop)
1275 {
1276         struct cryptkop *krp = NULL;
1277         int error = EINVAL;
1278         int in, out, size, i;
1279
1280         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1281                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1282                 return (EFBIG);
1283         }
1284
1285         in = kop->crk_iparams;
1286         out = kop->crk_oparams;
1287         switch (kop->crk_op) {
1288         case CRK_MOD_EXP:
1289                 if (in == 3 && out == 1)
1290                         break;
1291                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1292                 return (EINVAL);
1293         case CRK_MOD_EXP_CRT:
1294                 if (in == 6 && out == 1)
1295                         break;
1296                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1297                 return (EINVAL);
1298         case CRK_DSA_SIGN:
1299                 if (in == 5 && out == 2)
1300                         break;
1301                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1302                 return (EINVAL);
1303         case CRK_DSA_VERIFY:
1304                 if (in == 7 && out == 0)
1305                         break;
1306                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1307                 return (EINVAL);
1308         case CRK_DH_COMPUTE_KEY:
1309                 if (in == 3 && out == 1)
1310                         break;
1311                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1312                 return (EINVAL);
1313         default:
1314                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1315                 return (EINVAL);
1316         }
1317
1318         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
1319         if (!krp) {
1320                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1321                 return (ENOMEM);
1322         }
1323         krp->krp_op = kop->crk_op;
1324         krp->krp_status = kop->crk_status;
1325         krp->krp_iparams = kop->crk_iparams;
1326         krp->krp_oparams = kop->crk_oparams;
1327         krp->krp_crid = kop->crk_crid;
1328         krp->krp_status = 0;
1329         krp->krp_callback = cryptodevkey_cb;
1330
1331         for (i = 0; i < CRK_MAXPARAM; i++) {
1332                 if (kop->crk_param[i].crp_nbits > 65536) {
1333                         /* Limit is the same as in OpenBSD */
1334                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1335                         goto fail;
1336                 }
1337                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1338         }
1339         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1340                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1341                 if (size == 0)
1342                         continue;
1343                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
1344                 if (i >= krp->krp_iparams)
1345                         continue;
1346                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1347                 if (error) {
1348                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1349                         goto fail;
1350                 }
1351         }
1352
1353         error = crypto_kdispatch(krp);
1354         if (error) {
1355                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1356                 goto fail;
1357         }
1358         error = tsleep(krp, PSOCK, "crydev", 0);
1359         if (error) {
1360                 /* XXX can this happen?  if so, how do we recover? */
1361                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1362                 goto fail;
1363         }
1364
1365         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1366         if (krp->krp_status != 0) {
1367                 error = krp->krp_status;
1368                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1369                 goto fail;
1370         }
1371
1372         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1373                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1374                 if (size == 0)
1375                         continue;
1376                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1377                 if (error) {
1378                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1379                         goto fail;
1380                 }
1381         }
1382
1383 fail:
1384         if (krp) {
1385                 kop->crk_status = krp->krp_status;
1386                 for (i = 0; i < CRK_MAXPARAM; i++) {
1387                         if (krp->krp_param[i].crp_p)
1388                                 free(krp->krp_param[i].crp_p, M_XDATA);
1389                 }
1390                 free(krp, M_XDATA);
1391         }
1392         return (error);
1393 }
1394
1395 static int
1396 cryptodev_find(struct crypt_find_op *find)
1397 {
1398         device_t dev;
1399         size_t fnlen = sizeof find->name;
1400
1401         if (find->crid != -1) {
1402                 dev = crypto_find_device_byhid(find->crid);
1403                 if (dev == NULL)
1404                         return (ENOENT);
1405                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1406                 find->name[fnlen - 1] = '\x0';
1407         } else {
1408                 find->name[fnlen - 1] = '\x0';
1409                 find->crid = crypto_find_driver(find->name);
1410                 if (find->crid == -1)
1411                         return (ENOENT);
1412         }
1413         return (0);
1414 }
1415
1416 /* ARGSUSED */
1417 static int
1418 cryptof_stat(
1419         struct file *fp,
1420         struct stat *sb,
1421         struct ucred *active_cred,
1422         struct thread *td)
1423 {
1424
1425         return (EOPNOTSUPP);
1426 }
1427
1428 /* ARGSUSED */
1429 static int
1430 cryptof_close(struct file *fp, struct thread *td)
1431 {
1432         struct fcrypt *fcr = fp->f_data;
1433         struct csession *cse;
1434
1435         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1436                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1437                 KASSERT(cse->refs == 1,
1438                     ("%s: crypto session %p with %d refs", __func__, cse,
1439                     cse->refs));
1440                 csefree(cse);
1441         }
1442         free(fcr, M_XDATA);
1443         fp->f_data = NULL;
1444         return 0;
1445 }
1446
1447 static int
1448 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
1449 {
1450
1451         kif->kf_type = KF_TYPE_CRYPTO;
1452         return (0);
1453 }
1454
1455 static struct csession *
1456 csefind(struct fcrypt *fcr, u_int ses)
1457 {
1458         struct csession *cse;
1459
1460         mtx_lock(&fcr->lock);
1461         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1462                 if (cse->ses == ses) {
1463                         refcount_acquire(&cse->refs);
1464                         mtx_unlock(&fcr->lock);
1465                         return (cse);
1466                 }
1467         }
1468         mtx_unlock(&fcr->lock);
1469         return (NULL);
1470 }
1471
1472 static bool
1473 csedelete(struct fcrypt *fcr, u_int ses)
1474 {
1475         struct csession *cse;
1476
1477         mtx_lock(&fcr->lock);
1478         TAILQ_FOREACH(cse, &fcr->csessions, next) {
1479                 if (cse->ses == ses) {
1480                         TAILQ_REMOVE(&fcr->csessions, cse, next);
1481                         mtx_unlock(&fcr->lock);
1482                         csefree(cse);
1483                         return (true);
1484                 }
1485         }
1486         mtx_unlock(&fcr->lock);
1487         return (false);
1488 }
1489
1490 struct csession *
1491 csecreate(struct fcrypt *fcr, crypto_session_t cses,
1492     struct crypto_session_params *csp, struct enc_xform *txform,
1493     void *key, struct auth_hash *thash, void *mackey)
1494 {
1495         struct csession *cse;
1496
1497         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
1498         if (cse == NULL)
1499                 return NULL;
1500         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
1501         refcount_init(&cse->refs, 1);
1502         cse->key = key;
1503         cse->mackey = mackey;
1504         cse->mode = csp->csp_mode;
1505         cse->cses = cses;
1506         cse->txform = txform;
1507         if (thash != NULL)
1508                 cse->hashsize = thash->hashsize;
1509         else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
1510                 cse->hashsize = AES_GMAC_HASH_LEN;
1511         else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
1512                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
1513         cse->ivsize = csp->csp_ivlen;
1514         mtx_lock(&fcr->lock);
1515         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
1516         cse->ses = fcr->sesn++;
1517         mtx_unlock(&fcr->lock);
1518         return (cse);
1519 }
1520
1521 static void
1522 csefree(struct csession *cse)
1523 {
1524
1525         if (!refcount_release(&cse->refs))
1526                 return;
1527         crypto_freesession(cse->cses);
1528         mtx_destroy(&cse->lock);
1529         if (cse->key)
1530                 free(cse->key, M_XDATA);
1531         if (cse->mackey)
1532                 free(cse->mackey, M_XDATA);
1533         free(cse, M_XDATA);
1534 }
1535
1536 static int
1537 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1538 {
1539         struct file *f;
1540         struct fcrypt *fcr;
1541         int fd, error;
1542
1543         switch (cmd) {
1544         case CRIOGET:
1545                 error = falloc_noinstall(td, &f);
1546                 if (error)
1547                         break;
1548
1549                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
1550                 TAILQ_INIT(&fcr->csessions);
1551                 mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1552
1553                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
1554                 error = finstall(td, f, &fd, 0, NULL);
1555                 if (error) {
1556                         mtx_destroy(&fcr->lock);
1557                         free(fcr, M_XDATA);
1558                 } else
1559                         *(uint32_t *)data = fd;
1560                 fdrop(f, td);
1561                 break;
1562         case CRIOFINDDEV:
1563                 error = cryptodev_find((struct crypt_find_op *)data);
1564                 break;
1565         case CRIOASYMFEAT:
1566                 error = crypto_getfeat((int *)data);
1567                 break;
1568         default:
1569                 error = EINVAL;
1570                 break;
1571         }
1572         return (error);
1573 }
1574
1575 static struct cdevsw crypto_cdevsw = {
1576         .d_version =    D_VERSION,
1577         .d_ioctl =      cryptoioctl,
1578         .d_name =       "crypto",
1579 };
1580 static struct cdev *crypto_dev;
1581
1582 /*
1583  * Initialization code, both for static and dynamic loading.
1584  */
1585 static int
1586 cryptodev_modevent(module_t mod, int type, void *unused)
1587 {
1588         switch (type) {
1589         case MOD_LOAD:
1590                 if (bootverbose)
1591                         printf("crypto: <crypto device>\n");
1592                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1593                                       UID_ROOT, GID_WHEEL, 0666,
1594                                       "crypto");
1595                 return 0;
1596         case MOD_UNLOAD:
1597                 /*XXX disallow if active sessions */
1598                 destroy_dev(crypto_dev);
1599                 return 0;
1600         }
1601         return EINVAL;
1602 }
1603
1604 static moduledata_t cryptodev_mod = {
1605         "cryptodev",
1606         cryptodev_modevent,
1607         0
1608 };
1609 MODULE_VERSION(cryptodev, 1);
1610 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1611 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1612 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);