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) 2014-2021 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  * Portions of this software were developed by Ararat River
  14  * Consulting, LLC under sponsorship of the FreeBSD Foundation.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  *
  20  * 1. Redistributions of source code must retain the above copyright
  21  *   notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *   notice, this list of conditions and the following disclaimer in the
  24  *   documentation and/or other materials provided with the distribution.
  25  * 3. The name of the author may not be used to endorse or promote products
  26  *   derived from this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  29  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  31  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  32  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  33  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  34  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  35  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  36  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  37  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  * Effort sponsored in part by the Defense Advanced Research Projects
  40  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  41  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
  42  */
  43
  44 #include <sys/cdefs.h>
  45 __FBSDID("$FreeBSD$");
  46
  47 #include <sys/param.h>
  48 #include <sys/systm.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mbuf.h>
  51 #include <sys/lock.h>
  52 #include <sys/mutex.h>
  53 #include <sys/proc.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/errno.h>
  56 #include <sys/random.h>
  57 #include <sys/conf.h>
  58 #include <sys/kernel.h>
  59 #include <sys/module.h>
  60 #include <sys/fcntl.h>
  61 #include <sys/bus.h>
  62 #include <sys/sdt.h>
  63 #include <sys/syscallsubr.h>
  64
  65 #include <opencrypto/cryptodev.h>
  66 #include <opencrypto/xform.h>
  67
  68 SDT_PROVIDER_DECLARE(opencrypto);
  69
  70 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
  71
  72 #ifdef COMPAT_FREEBSD12
  73 /*
  74  * Previously, most ioctls were performed against a cloned descriptor
  75  * of /dev/crypto obtained via CRIOGET.  Now all ioctls are performed
  76  * against /dev/crypto directly.
  77  */
  78 #define CRIOGET         _IOWR('c', 100, uint32_t)
  79 #endif
  80
  81 /* the following are done against the cloned descriptor */
  82
  83 #ifdef COMPAT_FREEBSD32
  84 #include <sys/mount.h>
  85 #include <compat/freebsd32/freebsd32.h>
  86
  87 struct session_op32 {
  88         uint32_t        cipher;
  89         uint32_t        mac;
  90         uint32_t        keylen;
  91         uint32_t        key;
  92         int             mackeylen;
  93         uint32_t        mackey;
  94         uint32_t        ses;
  95 };
  96
  97 struct session2_op32 {
  98         uint32_t        cipher;
  99         uint32_t        mac;
 100         uint32_t        keylen;
 101         uint32_t        key;
 102         int             mackeylen;
 103         uint32_t        mackey;
 104         uint32_t        ses;
 105         int             crid;
 106         int             ivlen;
 107         int             maclen;
 108         int             pad[2];
 109 };
 110
 111 struct crypt_op32 {
 112         uint32_t        ses;
 113         uint16_t        op;
 114         uint16_t        flags;
 115         u_int           len;
 116         uint32_t        src, dst;
 117         uint32_t        mac;
 118         uint32_t        iv;
 119 };
 120
 121 struct crypt_aead32 {
 122         uint32_t        ses;
 123         uint16_t        op;
 124         uint16_t        flags;
 125         u_int           len;
 126         u_int           aadlen;
 127         u_int           ivlen;
 128         uint32_t        src;
 129         uint32_t        dst;
 130         uint32_t        aad;
 131         uint32_t        tag;
 132         uint32_t        iv;
 133 };
 134
 135 struct crparam32 {
 136         uint32_t        crp_p;
 137         u_int           crp_nbits;
 138 };
 139
 140 struct crypt_kop32 {
 141         u_int           crk_op;
 142         u_int           crk_status;
 143         u_short         crk_iparams;
 144         u_short         crk_oparams;
 145         u_int           crk_crid;
 146         struct crparam32        crk_param[CRK_MAXPARAM];
 147 };
 148
 149 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
 150 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
 151 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
 152 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
 153 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
 154 #define CIOCCRYPTAEAD32 _IOWR('c', 109, struct crypt_aead32)
 155
 156 static void
 157 session_op_from_32(const struct session_op32 *from, struct session2_op *to)
 158 {
 159
 160         memset(to, 0, sizeof(*to));
 161         CP(*from, *to, cipher);
 162         CP(*from, *to, mac);
 163         CP(*from, *to, keylen);
 164         PTRIN_CP(*from, *to, key);
 165         CP(*from, *to, mackeylen);
 166         PTRIN_CP(*from, *to, mackey);
 167         CP(*from, *to, ses);
 168         to->crid = CRYPTOCAP_F_HARDWARE;
 169 }
 170
 171 static void
 172 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
 173 {
 174
 175         session_op_from_32((const struct session_op32 *)from, to);
 176         CP(*from, *to, crid);
 177         CP(*from, *to, ivlen);
 178         CP(*from, *to, maclen);
 179 }
 180
 181 static void
 182 session_op_to_32(const struct session2_op *from, struct session_op32 *to)
 183 {
 184
 185         CP(*from, *to, cipher);
 186         CP(*from, *to, mac);
 187         CP(*from, *to, keylen);
 188         PTROUT_CP(*from, *to, key);
 189         CP(*from, *to, mackeylen);
 190         PTROUT_CP(*from, *to, mackey);
 191         CP(*from, *to, ses);
 192 }
 193
 194 static void
 195 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
 196 {
 197
 198         session_op_to_32(from, (struct session_op32 *)to);
 199         CP(*from, *to, crid);
 200 }
 201
 202 static void
 203 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
 204 {
 205
 206         CP(*from, *to, ses);
 207         CP(*from, *to, op);
 208         CP(*from, *to, flags);
 209         CP(*from, *to, len);
 210         PTRIN_CP(*from, *to, src);
 211         PTRIN_CP(*from, *to, dst);
 212         PTRIN_CP(*from, *to, mac);
 213         PTRIN_CP(*from, *to, iv);
 214 }
 215
 216 static void
 217 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
 218 {
 219
 220         CP(*from, *to, ses);
 221         CP(*from, *to, op);
 222         CP(*from, *to, flags);
 223         CP(*from, *to, len);
 224         PTROUT_CP(*from, *to, src);
 225         PTROUT_CP(*from, *to, dst);
 226         PTROUT_CP(*from, *to, mac);
 227         PTROUT_CP(*from, *to, iv);
 228 }
 229
 230 static void
 231 crypt_aead_from_32(const struct crypt_aead32 *from, struct crypt_aead *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         PTRIN_CP(*from, *to, src);
 241         PTRIN_CP(*from, *to, dst);
 242         PTRIN_CP(*from, *to, aad);
 243         PTRIN_CP(*from, *to, tag);
 244         PTRIN_CP(*from, *to, iv);
 245 }
 246
 247 static void
 248 crypt_aead_to_32(const struct crypt_aead *from, struct crypt_aead32 *to)
 249 {
 250
 251         CP(*from, *to, ses);
 252         CP(*from, *to, op);
 253         CP(*from, *to, flags);
 254         CP(*from, *to, len);
 255         CP(*from, *to, aadlen);
 256         CP(*from, *to, ivlen);
 257         PTROUT_CP(*from, *to, src);
 258         PTROUT_CP(*from, *to, dst);
 259         PTROUT_CP(*from, *to, aad);
 260         PTROUT_CP(*from, *to, tag);
 261         PTROUT_CP(*from, *to, iv);
 262 }
 263
 264 static void
 265 crparam_from_32(const struct crparam32 *from, struct crparam *to)
 266 {
 267
 268         PTRIN_CP(*from, *to, crp_p);
 269         CP(*from, *to, crp_nbits);
 270 }
 271
 272 static void
 273 crparam_to_32(const struct crparam *from, struct crparam32 *to)
 274 {
 275
 276         PTROUT_CP(*from, *to, crp_p);
 277         CP(*from, *to, crp_nbits);
 278 }
 279
 280 static void
 281 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
 282 {
 283         int i;
 284
 285         CP(*from, *to, crk_op);
 286         CP(*from, *to, crk_status);
 287         CP(*from, *to, crk_iparams);
 288         CP(*from, *to, crk_oparams);
 289         CP(*from, *to, crk_crid);
 290         for (i = 0; i < CRK_MAXPARAM; i++)
 291                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
 292 }
 293
 294 static void
 295 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
 296 {
 297         int i;
 298
 299         CP(*from, *to, crk_op);
 300         CP(*from, *to, crk_status);
 301         CP(*from, *to, crk_iparams);
 302         CP(*from, *to, crk_oparams);
 303         CP(*from, *to, crk_crid);
 304         for (i = 0; i < CRK_MAXPARAM; i++)
 305                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
 306 }
 307 #endif
 308
 309 static void
 310 session2_op_from_op(const struct session_op *from, struct session2_op *to)
 311 {
 312
 313         memset(to, 0, sizeof(*to));
 314         memcpy(to, from, sizeof(*from));
 315         to->crid = CRYPTOCAP_F_HARDWARE;
 316 }
 317
 318 static void
 319 session2_op_to_op(const struct session2_op *from, struct session_op *to)
 320 {
 321
 322         memcpy(to, from, sizeof(*to));
 323 }
 324
 325 struct csession {
 326         TAILQ_ENTRY(csession) next;
 327         crypto_session_t cses;
 328         volatile u_int  refs;
 329         uint32_t        ses;
 330         struct mtx      lock;           /* for op submission */
 331
 332         struct enc_xform *txform;
 333         int             hashsize;
 334         int             ivsize;
 335
 336         void            *key;
 337         void            *mackey;
 338 };
 339
 340 struct cryptop_data {
 341         struct csession *cse;
 342
 343         char            *buf;
 344         char            *obuf;
 345         char            *aad;
 346         bool            done;
 347 };
 348
 349 struct fcrypt {
 350         TAILQ_HEAD(csessionlist, csession) csessions;
 351         int             sesn;
 352         struct mtx      lock;
 353 };
 354
 355 static bool use_outputbuffers;
 356 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
 357     &use_outputbuffers, 0,
 358     "Use separate output buffers for /dev/crypto requests.");
 359
 360 static bool use_separate_aad;
 361 SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
 362     &use_separate_aad, 0,
 363     "Use separate AAD buffer for /dev/crypto requests.");
 364
 365 static struct timeval warninterval = { .tv_sec = 60, .tv_usec = 0 };
 366 SYSCTL_TIMEVAL_SEC(_kern, OID_AUTO, cryptodev_warn_interval, CTLFLAG_RW,
 367     &warninterval,
 368     "Delay in seconds between warnings of deprecated /dev/crypto algorithms");
 369
 370 static MALLOC_DEFINE(M_CRYPTODEV, "cryptodev", "/dev/crypto data buffers");
 371
 372 /*
 373  * Check a crypto identifier to see if it requested
 374  * a software device/driver.  This can be done either
 375  * by device name/class or through search constraints.
 376  */
 377 static int
 378 checkforsoftware(int *cridp)
 379 {
 380         int crid;
 381
 382         crid = *cridp;
 383
 384         if (!crypto_devallowsoft) {
 385                 if (crid & CRYPTOCAP_F_SOFTWARE) {
 386                         if (crid & CRYPTOCAP_F_HARDWARE) {
 387                                 *cridp = CRYPTOCAP_F_HARDWARE;
 388                                 return 0;
 389                         }
 390                         return EINVAL;
 391                 }
 392                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
 393                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
 394                         return EINVAL;
 395         }
 396         return 0;
 397 }
 398
 399 static int
 400 cse_create(struct fcrypt *fcr, struct session2_op *sop)
 401 {
 402         struct crypto_session_params csp;
 403         struct csession *cse;
 404         struct enc_xform *txform;
 405         struct auth_hash *thash;
 406         void *key = NULL;
 407         void *mackey = NULL;
 408         crypto_session_t cses;
 409         int crid, error;
 410
 411         switch (sop->cipher) {
 412         case 0:
 413                 txform = NULL;
 414                 break;
 415         case CRYPTO_AES_CBC:
 416                 txform = &enc_xform_rijndael128;
 417                 break;
 418         case CRYPTO_AES_XTS:
 419                 txform = &enc_xform_aes_xts;
 420                 break;
 421         case CRYPTO_NULL_CBC:
 422                 txform = &enc_xform_null;
 423                 break;
 424         case CRYPTO_CAMELLIA_CBC:
 425                 txform = &enc_xform_camellia;
 426                 break;
 427         case CRYPTO_AES_ICM:
 428                 txform = &enc_xform_aes_icm;
 429                 break;
 430         case CRYPTO_AES_NIST_GCM_16:
 431                 txform = &enc_xform_aes_nist_gcm;
 432                 break;
 433         case CRYPTO_CHACHA20:
 434                 txform = &enc_xform_chacha20;
 435                 break;
 436         case CRYPTO_AES_CCM_16:
 437                 txform = &enc_xform_ccm;
 438                 break;
 439         case CRYPTO_CHACHA20_POLY1305:
 440                 txform = &enc_xform_chacha20_poly1305;
 441                 break;
 442         default:
 443                 CRYPTDEB("invalid cipher");
 444                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 445                 return (EINVAL);
 446         }
 447
 448         switch (sop->mac) {
 449         case 0:
 450                 thash = NULL;
 451                 break;
 452         case CRYPTO_POLY1305:
 453                 thash = &auth_hash_poly1305;
 454                 break;
 455         case CRYPTO_SHA1_HMAC:
 456                 thash = &auth_hash_hmac_sha1;
 457                 break;
 458         case CRYPTO_SHA2_224_HMAC:
 459                 thash = &auth_hash_hmac_sha2_224;
 460                 break;
 461         case CRYPTO_SHA2_256_HMAC:
 462                 thash = &auth_hash_hmac_sha2_256;
 463                 break;
 464         case CRYPTO_SHA2_384_HMAC:
 465                 thash = &auth_hash_hmac_sha2_384;
 466                 break;
 467         case CRYPTO_SHA2_512_HMAC:
 468                 thash = &auth_hash_hmac_sha2_512;
 469                 break;
 470         case CRYPTO_RIPEMD160_HMAC:
 471                 thash = &auth_hash_hmac_ripemd_160;
 472                 break;
 473 #ifdef COMPAT_FREEBSD12
 474         case CRYPTO_AES_128_NIST_GMAC:
 475         case CRYPTO_AES_192_NIST_GMAC:
 476         case CRYPTO_AES_256_NIST_GMAC:
 477                 /* Should always be paired with GCM. */
 478                 if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
 479                         CRYPTDEB("GMAC without GCM");
 480                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 481                         return (EINVAL);
 482                 }
 483                 break;
 484 #endif
 485         case CRYPTO_AES_NIST_GMAC:
 486                 switch (sop->mackeylen * 8) {
 487                 case 128:
 488                         thash = &auth_hash_nist_gmac_aes_128;
 489                         break;
 490                 case 192:
 491                         thash = &auth_hash_nist_gmac_aes_192;
 492                         break;
 493                 case 256:
 494                         thash = &auth_hash_nist_gmac_aes_256;
 495                         break;
 496                 default:
 497                         CRYPTDEB("invalid GMAC key length");
 498                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 499                         return (EINVAL);
 500                 }
 501                 break;
 502         case CRYPTO_AES_CCM_CBC_MAC:
 503                 switch (sop->mackeylen) {
 504                 case 16:
 505                         thash = &auth_hash_ccm_cbc_mac_128;
 506                         break;
 507                 case 24:
 508                         thash = &auth_hash_ccm_cbc_mac_192;
 509                         break;
 510                 case 32:
 511                         thash = &auth_hash_ccm_cbc_mac_256;
 512                         break;
 513                 default:
 514                         CRYPTDEB("Invalid CBC MAC key size %d", sop->keylen);
 515                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 516                         return (EINVAL);
 517                 }
 518                 break;
 519         case CRYPTO_SHA1:
 520                 thash = &auth_hash_sha1;
 521                 break;
 522         case CRYPTO_SHA2_224:
 523                 thash = &auth_hash_sha2_224;
 524                 break;
 525         case CRYPTO_SHA2_256:
 526                 thash = &auth_hash_sha2_256;
 527                 break;
 528         case CRYPTO_SHA2_384:
 529                 thash = &auth_hash_sha2_384;
 530                 break;
 531         case CRYPTO_SHA2_512:
 532                 thash = &auth_hash_sha2_512;
 533                 break;
 534
 535         case CRYPTO_NULL_HMAC:
 536                 thash = &auth_hash_null;
 537                 break;
 538
 539         case CRYPTO_BLAKE2B:
 540                 thash = &auth_hash_blake2b;
 541                 break;
 542         case CRYPTO_BLAKE2S:
 543                 thash = &auth_hash_blake2s;
 544                 break;
 545
 546         default:
 547                 CRYPTDEB("invalid mac");
 548                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 549                 return (EINVAL);
 550         }
 551
 552         if (txform == NULL && thash == NULL) {
 553                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 554                 return (EINVAL);
 555         }
 556
 557         memset(&csp, 0, sizeof(csp));
 558         if (use_outputbuffers)
 559                 csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
 560
 561         if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
 562                 switch (sop->mac) {
 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                         if (sop->keylen != sop->mackeylen) {
 568                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 569                                     __LINE__);
 570                                 return (EINVAL);
 571                         }
 572                         break;
 573 #endif
 574                 case 0:
 575                         break;
 576                 default:
 577                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 578                         return (EINVAL);
 579                 }
 580                 csp.csp_mode = CSP_MODE_AEAD;
 581         } else if (sop->cipher == CRYPTO_AES_CCM_16) {
 582                 switch (sop->mac) {
 583 #ifdef COMPAT_FREEBSD12
 584                 case CRYPTO_AES_CCM_CBC_MAC:
 585                         if (sop->keylen != sop->mackeylen) {
 586                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 587                                     __LINE__);
 588                                 return (EINVAL);
 589                         }
 590                         thash = NULL;
 591                         break;
 592 #endif
 593                 case 0:
 594                         break;
 595                 default:
 596                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 597                         return (EINVAL);
 598                 }
 599                 csp.csp_mode = CSP_MODE_AEAD;
 600         } else if (sop->cipher == CRYPTO_CHACHA20_POLY1305) {
 601                 if (sop->mac != 0) {
 602                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 603                         return (EINVAL);
 604                 }
 605                 csp.csp_mode = CSP_MODE_AEAD;
 606         } else if (txform != NULL && thash != NULL)
 607                 csp.csp_mode = CSP_MODE_ETA;
 608         else if (txform != NULL)
 609                 csp.csp_mode = CSP_MODE_CIPHER;
 610         else
 611                 csp.csp_mode = CSP_MODE_DIGEST;
 612
 613         switch (csp.csp_mode) {
 614         case CSP_MODE_AEAD:
 615         case CSP_MODE_ETA:
 616                 if (use_separate_aad)
 617                         csp.csp_flags |= CSP_F_SEPARATE_AAD;
 618                 break;
 619         }
 620
 621         if (txform != NULL) {
 622                 csp.csp_cipher_alg = txform->type;
 623                 csp.csp_cipher_klen = sop->keylen;
 624                 if (sop->keylen > txform->maxkey ||
 625                     sop->keylen < txform->minkey) {
 626                         CRYPTDEB("invalid cipher parameters");
 627                         error = EINVAL;
 628                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 629                         goto bail;
 630                 }
 631
 632                 key = malloc(csp.csp_cipher_klen, M_CRYPTODEV, M_WAITOK);
 633                 error = copyin(sop->key, key, csp.csp_cipher_klen);
 634                 if (error) {
 635                         CRYPTDEB("invalid key");
 636                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 637                         goto bail;
 638                 }
 639                 csp.csp_cipher_key = key;
 640                 csp.csp_ivlen = txform->ivsize;
 641         }
 642
 643         if (thash != NULL) {
 644                 csp.csp_auth_alg = thash->type;
 645                 csp.csp_auth_klen = sop->mackeylen;
 646                 if (sop->mackeylen > thash->keysize || sop->mackeylen < 0) {
 647                         CRYPTDEB("invalid mac key length");
 648                         error = EINVAL;
 649                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 650                         goto bail;
 651                 }
 652
 653                 if (csp.csp_auth_klen != 0) {
 654                         mackey = malloc(csp.csp_auth_klen, M_CRYPTODEV,
 655                             M_WAITOK);
 656                         error = copyin(sop->mackey, mackey, csp.csp_auth_klen);
 657                         if (error) {
 658                                 CRYPTDEB("invalid mac key");
 659                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
 660                                     __LINE__);
 661                                 goto bail;
 662                         }
 663                         csp.csp_auth_key = mackey;
 664                 }
 665
 666                 if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
 667                         csp.csp_ivlen = AES_GCM_IV_LEN;
 668                 if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
 669                         csp.csp_ivlen = AES_CCM_IV_LEN;
 670         }
 671
 672         if (sop->ivlen != 0) {
 673                 if (csp.csp_ivlen == 0) {
 674                         CRYPTDEB("does not support an IV");
 675                         error = EINVAL;
 676                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 677                         goto bail;
 678                 }
 679                 csp.csp_ivlen = sop->ivlen;
 680         }
 681         if (sop->maclen != 0) {
 682                 if (!(thash != NULL || csp.csp_mode == CSP_MODE_AEAD)) {
 683                         CRYPTDEB("does not support a MAC");
 684                         error = EINVAL;
 685                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 686                         goto bail;
 687                 }
 688                 csp.csp_auth_mlen = sop->maclen;
 689         }
 690
 691         crid = sop->crid;
 692         error = checkforsoftware(&crid);
 693         if (error) {
 694                 CRYPTDEB("checkforsoftware");
 695                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 696                 goto bail;
 697         }
 698         error = crypto_newsession(&cses, &csp, crid);
 699         if (error) {
 700                 CRYPTDEB("crypto_newsession");
 701                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 702                 goto bail;
 703         }
 704
 705         cse = malloc(sizeof(struct csession), M_CRYPTODEV, M_WAITOK | M_ZERO);
 706         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
 707         refcount_init(&cse->refs, 1);
 708         cse->key = key;
 709         cse->mackey = mackey;
 710         cse->cses = cses;
 711         cse->txform = txform;
 712         if (sop->maclen != 0)
 713                 cse->hashsize = sop->maclen;
 714         else if (thash != NULL)
 715                 cse->hashsize = thash->hashsize;
 716         else if (csp.csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
 717                 cse->hashsize = AES_GMAC_HASH_LEN;
 718         else if (csp.csp_cipher_alg == CRYPTO_AES_CCM_16)
 719                 cse->hashsize = AES_CBC_MAC_HASH_LEN;
 720         else if (csp.csp_cipher_alg == CRYPTO_CHACHA20_POLY1305)
 721                 cse->hashsize = POLY1305_HASH_LEN;
 722         cse->ivsize = csp.csp_ivlen;
 723
 724         mtx_lock(&fcr->lock);
 725         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
 726         cse->ses = fcr->sesn++;
 727         mtx_unlock(&fcr->lock);
 728
 729         sop->ses = cse->ses;
 730
 731         /* return hardware/driver id */
 732         sop->crid = crypto_ses2hid(cse->cses);
 733 bail:
 734         if (error) {
 735                 free(key, M_CRYPTODEV);
 736                 free(mackey, M_CRYPTODEV);
 737         }
 738         return (error);
 739 }
 740
 741 static struct csession *
 742 cse_find(struct fcrypt *fcr, u_int ses)
 743 {
 744         struct csession *cse;
 745
 746         mtx_lock(&fcr->lock);
 747         TAILQ_FOREACH(cse, &fcr->csessions, next) {
 748                 if (cse->ses == ses) {
 749                         refcount_acquire(&cse->refs);
 750                         mtx_unlock(&fcr->lock);
 751                         return (cse);
 752                 }
 753         }
 754         mtx_unlock(&fcr->lock);
 755         return (NULL);
 756 }
 757
 758 static void
 759 cse_free(struct csession *cse)
 760 {
 761
 762         if (!refcount_release(&cse->refs))
 763                 return;
 764         crypto_freesession(cse->cses);
 765         mtx_destroy(&cse->lock);
 766         if (cse->key)
 767                 free(cse->key, M_CRYPTODEV);
 768         if (cse->mackey)
 769                 free(cse->mackey, M_CRYPTODEV);
 770         free(cse, M_CRYPTODEV);
 771 }
 772
 773 static bool
 774 cse_delete(struct fcrypt *fcr, u_int ses)
 775 {
 776         struct csession *cse;
 777
 778         mtx_lock(&fcr->lock);
 779         TAILQ_FOREACH(cse, &fcr->csessions, next) {
 780                 if (cse->ses == ses) {
 781                         TAILQ_REMOVE(&fcr->csessions, cse, next);
 782                         mtx_unlock(&fcr->lock);
 783                         cse_free(cse);
 784                         return (true);
 785                 }
 786         }
 787         mtx_unlock(&fcr->lock);
 788         return (false);
 789 }
 790
 791 static struct cryptop_data *
 792 cod_alloc(struct csession *cse, size_t aad_len, size_t len)
 793 {
 794         struct cryptop_data *cod;
 795
 796         cod = malloc(sizeof(struct cryptop_data), M_CRYPTODEV, M_WAITOK |
 797             M_ZERO);
 798
 799         cod->cse = cse;
 800         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
 801                 if (aad_len != 0)
 802                         cod->aad = malloc(aad_len, M_CRYPTODEV, M_WAITOK);
 803                 cod->buf = malloc(len, M_CRYPTODEV, M_WAITOK);
 804         } else
 805                 cod->buf = malloc(aad_len + len, M_CRYPTODEV, M_WAITOK);
 806         if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
 807                 cod->obuf = malloc(len, M_CRYPTODEV, M_WAITOK);
 808         return (cod);
 809 }
 810
 811 static void
 812 cod_free(struct cryptop_data *cod)
 813 {
 814
 815         free(cod->aad, M_CRYPTODEV);
 816         free(cod->obuf, M_CRYPTODEV);
 817         free(cod->buf, M_CRYPTODEV);
 818         free(cod, M_CRYPTODEV);
 819 }
 820
 821 static int
 822 cryptodev_cb(struct cryptop *crp)
 823 {
 824         struct cryptop_data *cod = crp->crp_opaque;
 825
 826         /*
 827          * Lock to ensure the wakeup() is not missed by the loops
 828          * waiting on cod->done in cryptodev_op() and
 829          * cryptodev_aead().
 830          */
 831         mtx_lock(&cod->cse->lock);
 832         cod->done = true;
 833         mtx_unlock(&cod->cse->lock);
 834         wakeup(cod);
 835         return (0);
 836 }
 837
 838 static int
 839 cryptodev_op(struct csession *cse, const struct crypt_op *cop)
 840 {
 841         const struct crypto_session_params *csp;
 842         struct cryptop_data *cod = NULL;
 843         struct cryptop *crp = NULL;
 844         char *dst;
 845         int error;
 846
 847         if (cop->len > 256*1024-4) {
 848                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 849                 return (E2BIG);
 850         }
 851
 852         if (cse->txform) {
 853                 if ((cop->len % cse->txform->blocksize) != 0) {
 854                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 855                         return (EINVAL);
 856                 }
 857         }
 858
 859         if (cop->mac && cse->hashsize == 0) {
 860                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 861                 return (EINVAL);
 862         }
 863
 864         /*
 865          * The COP_F_CIPHER_FIRST flag predates explicit session
 866          * modes, but the only way it was used was for EtA so allow it
 867          * as long as it is consistent with EtA.
 868          */
 869         if (cop->flags & COP_F_CIPHER_FIRST) {
 870                 if (cop->op != COP_ENCRYPT) {
 871                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
 872                         return (EINVAL);
 873                 }
 874         }
 875
 876         cod = cod_alloc(cse, 0, cop->len + cse->hashsize);
 877         dst = cop->dst;
 878
 879         crp = crypto_getreq(cse->cses, M_WAITOK);
 880
 881         error = copyin(cop->src, cod->buf, cop->len);
 882         if (error) {
 883                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 884                 goto bail;
 885         }
 886         crp->crp_payload_start = 0;
 887         crp->crp_payload_length = cop->len;
 888         if (cse->hashsize)
 889                 crp->crp_digest_start = cop->len;
 890
 891         csp = crypto_get_params(cse->cses);
 892         switch (csp->csp_mode) {
 893         case CSP_MODE_COMPRESS:
 894                 switch (cop->op) {
 895                 case COP_ENCRYPT:
 896                         crp->crp_op = CRYPTO_OP_COMPRESS;
 897                         break;
 898                 case COP_DECRYPT:
 899                         crp->crp_op = CRYPTO_OP_DECOMPRESS;
 900                         break;
 901                 default:
 902                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 903                         error = EINVAL;
 904                         goto bail;
 905                 }
 906                 break;
 907         case CSP_MODE_CIPHER:
 908                 if (cop->len == 0 ||
 909                     (cop->iv == NULL && cop->len == cse->ivsize)) {
 910                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 911                         error = EINVAL;
 912                         goto bail;
 913                 }
 914                 switch (cop->op) {
 915                 case COP_ENCRYPT:
 916                         crp->crp_op = CRYPTO_OP_ENCRYPT;
 917                         break;
 918                 case COP_DECRYPT:
 919                         crp->crp_op = CRYPTO_OP_DECRYPT;
 920                         break;
 921                 default:
 922                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 923                         error = EINVAL;
 924                         goto bail;
 925                 }
 926                 break;
 927         case CSP_MODE_DIGEST:
 928                 switch (cop->op) {
 929                 case 0:
 930                 case COP_ENCRYPT:
 931                 case COP_DECRYPT:
 932                         crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
 933                         if (cod->obuf != NULL)
 934                                 crp->crp_digest_start = 0;
 935                         break;
 936                 default:
 937                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 938                         error = EINVAL;
 939                         goto bail;
 940                 }
 941                 break;
 942         case CSP_MODE_AEAD:
 943                 if (cse->ivsize != 0 && cop->iv == NULL) {
 944                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 945                         error = EINVAL;
 946                         goto bail;
 947                 }
 948                 /* FALLTHROUGH */
 949         case CSP_MODE_ETA:
 950                 switch (cop->op) {
 951                 case COP_ENCRYPT:
 952                         crp->crp_op = CRYPTO_OP_ENCRYPT |
 953                             CRYPTO_OP_COMPUTE_DIGEST;
 954                         break;
 955                 case COP_DECRYPT:
 956                         crp->crp_op = CRYPTO_OP_DECRYPT |
 957                             CRYPTO_OP_VERIFY_DIGEST;
 958                         break;
 959                 default:
 960                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 961                         error = EINVAL;
 962                         goto bail;
 963                 }
 964                 break;
 965         default:
 966                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 967                 error = EINVAL;
 968                 goto bail;
 969         }
 970
 971         crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
 972         crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
 973         if (cod->obuf)
 974                 crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
 975         crp->crp_callback = cryptodev_cb;
 976         crp->crp_opaque = cod;
 977
 978         if (cop->iv) {
 979                 if (cse->ivsize == 0) {
 980                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 981                         error = EINVAL;
 982                         goto bail;
 983                 }
 984                 error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
 985                 if (error) {
 986                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 987                         goto bail;
 988                 }
 989                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
 990         } else if (cse->ivsize != 0) {
 991                 if (crp->crp_payload_length < cse->ivsize) {
 992                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 993                         error = EINVAL;
 994                         goto bail;
 995                 }
 996                 crp->crp_iv_start = 0;
 997                 crp->crp_payload_length -= cse->ivsize;
 998                 if (crp->crp_payload_length != 0)
 999                         crp->crp_payload_start = cse->ivsize;
1000                 dst += cse->ivsize;
1001         }
1002
1003         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1004                 error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
1005                     cse->hashsize);
1006                 if (error) {
1007                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1008                         goto bail;
1009                 }
1010         }
1011 again:
1012         /*
1013          * Let the dispatch run unlocked, then, interlock against the
1014          * callback before checking if the operation completed and going
1015          * to sleep.  This insures drivers don't inherit our lock which
1016          * results in a lock order reversal between crypto_dispatch forced
1017          * entry and the crypto_done callback into us.
1018          */
1019         error = crypto_dispatch(crp);
1020         if (error != 0) {
1021                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1022                 goto bail;
1023         }
1024
1025         mtx_lock(&cse->lock);
1026         while (!cod->done)
1027                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1028         mtx_unlock(&cse->lock);
1029
1030         if (crp->crp_etype == EAGAIN) {
1031                 crp->crp_etype = 0;
1032                 crp->crp_flags &= ~CRYPTO_F_DONE;
1033                 cod->done = false;
1034                 goto again;
1035         }
1036
1037         if (crp->crp_etype != 0) {
1038                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1039                 error = crp->crp_etype;
1040                 goto bail;
1041         }
1042
1043         if (cop->dst != NULL) {
1044                 error = copyout(cod->obuf != NULL ? cod->obuf :
1045                     cod->buf + crp->crp_payload_start, dst,
1046                     crp->crp_payload_length);
1047                 if (error) {
1048                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1049                         goto bail;
1050                 }
1051         }
1052
1053         if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1054                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1055                     crp->crp_digest_start, cop->mac, cse->hashsize);
1056                 if (error) {
1057                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1058                         goto bail;
1059                 }
1060         }
1061
1062 bail:
1063         crypto_freereq(crp);
1064         cod_free(cod);
1065
1066         return (error);
1067 }
1068
1069 static int
1070 cryptodev_aead(struct csession *cse, struct crypt_aead *caead)
1071 {
1072         const struct crypto_session_params *csp;
1073         struct cryptop_data *cod = NULL;
1074         struct cryptop *crp = NULL;
1075         char *dst;
1076         int error;
1077
1078         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
1079                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1080                 return (E2BIG);
1081         }
1082
1083         if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
1084             (caead->len % cse->txform->blocksize) != 0) {
1085                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1086                 return (EINVAL);
1087         }
1088
1089         /*
1090          * The COP_F_CIPHER_FIRST flag predates explicit session
1091          * modes, but the only way it was used was for EtA so allow it
1092          * as long as it is consistent with EtA.
1093          */
1094         if (caead->flags & COP_F_CIPHER_FIRST) {
1095                 if (caead->op != COP_ENCRYPT) {
1096                         SDT_PROBE1(opencrypto, dev, ioctl, error,  __LINE__);
1097                         return (EINVAL);
1098                 }
1099         }
1100
1101         cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize);
1102         dst = caead->dst;
1103
1104         crp = crypto_getreq(cse->cses, M_WAITOK);
1105
1106         if (cod->aad != NULL)
1107                 error = copyin(caead->aad, cod->aad, caead->aadlen);
1108         else
1109                 error = copyin(caead->aad, cod->buf, caead->aadlen);
1110         if (error) {
1111                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1112                 goto bail;
1113         }
1114         crp->crp_aad = cod->aad;
1115         crp->crp_aad_start = 0;
1116         crp->crp_aad_length = caead->aadlen;
1117
1118         if (cod->aad != NULL)
1119                 crp->crp_payload_start = 0;
1120         else
1121                 crp->crp_payload_start = caead->aadlen;
1122         error = copyin(caead->src, cod->buf + crp->crp_payload_start,
1123             caead->len);
1124         if (error) {
1125                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1126                 goto bail;
1127         }
1128         crp->crp_payload_length = caead->len;
1129         if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
1130                 crp->crp_digest_start = crp->crp_payload_output_start +
1131                     caead->len;
1132         else
1133                 crp->crp_digest_start = crp->crp_payload_start + caead->len;
1134
1135         csp = crypto_get_params(cse->cses);
1136         switch (csp->csp_mode) {
1137         case CSP_MODE_AEAD:
1138         case CSP_MODE_ETA:
1139                 switch (caead->op) {
1140                 case COP_ENCRYPT:
1141                         crp->crp_op = CRYPTO_OP_ENCRYPT |
1142                             CRYPTO_OP_COMPUTE_DIGEST;
1143                         break;
1144                 case COP_DECRYPT:
1145                         crp->crp_op = CRYPTO_OP_DECRYPT |
1146                             CRYPTO_OP_VERIFY_DIGEST;
1147                         break;
1148                 default:
1149                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1150                         error = EINVAL;
1151                         goto bail;
1152                 }
1153                 break;
1154         default:
1155                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1156                 error = EINVAL;
1157                 goto bail;
1158         }
1159
1160         crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
1161         crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
1162             cse->hashsize);
1163         if (cod->obuf != NULL)
1164                 crypto_use_output_buf(crp, cod->obuf, caead->len +
1165                     cse->hashsize);
1166         crp->crp_callback = cryptodev_cb;
1167         crp->crp_opaque = cod;
1168
1169         if (caead->iv) {
1170                 /*
1171                  * Permit a 16-byte IV for AES-XTS, but only use the
1172                  * first 8 bytes as a block number.
1173                  */
1174                 if (csp->csp_mode == CSP_MODE_ETA &&
1175                     csp->csp_cipher_alg == CRYPTO_AES_XTS &&
1176                     caead->ivlen == AES_BLOCK_LEN)
1177                         caead->ivlen = AES_XTS_IV_LEN;
1178
1179                 if (cse->ivsize == 0) {
1180                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1181                         error = EINVAL;
1182                         goto bail;
1183                 }
1184                 if (caead->ivlen != cse->ivsize) {
1185                         error = EINVAL;
1186                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1187                         goto bail;
1188                 }
1189
1190                 error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
1191                 if (error) {
1192                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1193                         goto bail;
1194                 }
1195                 crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
1196         } else {
1197                 error = EINVAL;
1198                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1199                 goto bail;
1200         }
1201
1202         if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
1203                 error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
1204                     cse->hashsize);
1205                 if (error) {
1206                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1207                         goto bail;
1208                 }
1209         }
1210 again:
1211         /*
1212          * Let the dispatch run unlocked, then, interlock against the
1213          * callback before checking if the operation completed and going
1214          * to sleep.  This insures drivers don't inherit our lock which
1215          * results in a lock order reversal between crypto_dispatch forced
1216          * entry and the crypto_done callback into us.
1217          */
1218         error = crypto_dispatch(crp);
1219         if (error != 0) {
1220                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1221                 goto bail;
1222         }
1223
1224         mtx_lock(&cse->lock);
1225         while (!cod->done)
1226                 mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
1227         mtx_unlock(&cse->lock);
1228
1229         if (crp->crp_etype == EAGAIN) {
1230                 crp->crp_etype = 0;
1231                 crp->crp_flags &= ~CRYPTO_F_DONE;
1232                 cod->done = false;
1233                 goto again;
1234         }
1235
1236         if (crp->crp_etype != 0) {
1237                 error = crp->crp_etype;
1238                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1239                 goto bail;
1240         }
1241
1242         if (caead->dst != NULL) {
1243                 error = copyout(cod->obuf != NULL ? cod->obuf :
1244                     cod->buf + crp->crp_payload_start, dst,
1245                     crp->crp_payload_length);
1246                 if (error) {
1247                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1248                         goto bail;
1249                 }
1250         }
1251
1252         if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
1253                 error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
1254                     crp->crp_digest_start, caead->tag, cse->hashsize);
1255                 if (error) {
1256                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1257                         goto bail;
1258                 }
1259         }
1260
1261 bail:
1262         crypto_freereq(crp);
1263         cod_free(cod);
1264
1265         return (error);
1266 }
1267
1268 static void
1269 cryptodevkey_cb(struct cryptkop *krp)
1270 {
1271
1272         wakeup_one(krp);
1273 }
1274
1275 static int
1276 cryptodev_key(struct crypt_kop *kop)
1277 {
1278         struct cryptkop *krp = NULL;
1279         int error = EINVAL;
1280         int in, out, size, i;
1281
1282         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
1283                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1284                 return (EFBIG);
1285         }
1286
1287         in = kop->crk_iparams;
1288         out = kop->crk_oparams;
1289         switch (kop->crk_op) {
1290         case CRK_MOD_EXP:
1291                 if (in == 3 && out == 1)
1292                         break;
1293                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1294                 return (EINVAL);
1295         case CRK_MOD_EXP_CRT:
1296                 if (in == 6 && out == 1)
1297                         break;
1298                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1299                 return (EINVAL);
1300         case CRK_DSA_SIGN:
1301                 if (in == 5 && out == 2)
1302                         break;
1303                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1304                 return (EINVAL);
1305         case CRK_DSA_VERIFY:
1306                 if (in == 7 && out == 0)
1307                         break;
1308                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1309                 return (EINVAL);
1310         case CRK_DH_COMPUTE_KEY:
1311                 if (in == 3 && out == 1)
1312                         break;
1313                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1314                 return (EINVAL);
1315         default:
1316                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1317                 return (EINVAL);
1318         }
1319
1320         krp = malloc(sizeof(*krp), M_CRYPTODEV, M_WAITOK | M_ZERO);
1321         krp->krp_op = kop->crk_op;
1322         krp->krp_status = kop->crk_status;
1323         krp->krp_iparams = kop->crk_iparams;
1324         krp->krp_oparams = kop->crk_oparams;
1325         krp->krp_crid = kop->crk_crid;
1326         krp->krp_status = 0;
1327         krp->krp_callback = cryptodevkey_cb;
1328
1329         for (i = 0; i < CRK_MAXPARAM; i++) {
1330                 if (kop->crk_param[i].crp_nbits > 65536) {
1331                         /* Limit is the same as in OpenBSD */
1332                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1333                         goto fail;
1334                 }
1335                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
1336         }
1337         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
1338                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1339                 if (size == 0)
1340                         continue;
1341                 krp->krp_param[i].crp_p = malloc(size, M_CRYPTODEV, M_WAITOK);
1342                 if (i >= krp->krp_iparams)
1343                         continue;
1344                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
1345                 if (error) {
1346                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1347                         goto fail;
1348                 }
1349         }
1350
1351         error = crypto_kdispatch(krp);
1352         if (error) {
1353                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1354                 goto fail;
1355         }
1356         error = tsleep(krp, PSOCK, "crydev", 0);
1357         if (error) {
1358                 /* XXX can this happen?  if so, how do we recover? */
1359                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1360                 goto fail;
1361         }
1362
1363         kop->crk_crid = krp->krp_hid;           /* device that did the work */
1364         if (krp->krp_status != 0) {
1365                 error = krp->krp_status;
1366                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1367                 goto fail;
1368         }
1369
1370         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
1371                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
1372                 if (size == 0)
1373                         continue;
1374                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
1375                 if (error) {
1376                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1377                         goto fail;
1378                 }
1379         }
1380
1381 fail:
1382         if (krp) {
1383                 kop->crk_status = krp->krp_status;
1384                 for (i = 0; i < CRK_MAXPARAM; i++) {
1385                         if (krp->krp_param[i].crp_p)
1386                                 free(krp->krp_param[i].crp_p, M_CRYPTODEV);
1387                 }
1388                 free(krp, M_CRYPTODEV);
1389         }
1390         return (error);
1391 }
1392
1393 static int
1394 cryptodev_find(struct crypt_find_op *find)
1395 {
1396         device_t dev;
1397         size_t fnlen = sizeof find->name;
1398
1399         if (find->crid != -1) {
1400                 dev = crypto_find_device_byhid(find->crid);
1401                 if (dev == NULL)
1402                         return (ENOENT);
1403                 strncpy(find->name, device_get_nameunit(dev), fnlen);
1404                 find->name[fnlen - 1] = '\x0';
1405         } else {
1406                 find->name[fnlen - 1] = '\x0';
1407                 find->crid = crypto_find_driver(find->name);
1408                 if (find->crid == -1)
1409                         return (ENOENT);
1410         }
1411         return (0);
1412 }
1413
1414 static void
1415 fcrypt_dtor(void *data)
1416 {
1417         struct fcrypt *fcr = data;
1418         struct csession *cse;
1419
1420         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
1421                 TAILQ_REMOVE(&fcr->csessions, cse, next);
1422                 KASSERT(refcount_load(&cse->refs) == 1,
1423                     ("%s: crypto session %p with %d refs", __func__, cse,
1424                     refcount_load(&cse->refs)));
1425                 cse_free(cse);
1426         }
1427         mtx_destroy(&fcr->lock);
1428         free(fcr, M_CRYPTODEV);
1429 }
1430
1431 static int
1432 crypto_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
1433 {
1434         struct fcrypt *fcr;
1435         int error;
1436
1437         fcr = malloc(sizeof(struct fcrypt), M_CRYPTODEV, M_WAITOK | M_ZERO);
1438         TAILQ_INIT(&fcr->csessions);
1439         mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
1440         error = devfs_set_cdevpriv(fcr, fcrypt_dtor);
1441         if (error)
1442                 fcrypt_dtor(fcr);
1443         return (error);
1444 }
1445
1446 static int
1447 crypto_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag,
1448     struct thread *td)
1449 {
1450         static struct timeval keywarn, featwarn;
1451         struct fcrypt *fcr;
1452         struct csession *cse;
1453         struct session2_op *sop;
1454         struct crypt_op *cop;
1455         struct crypt_aead *caead;
1456         struct crypt_kop *kop;
1457         uint32_t ses;
1458         int error = 0;
1459         union {
1460                 struct session2_op sopc;
1461 #ifdef COMPAT_FREEBSD32
1462                 struct crypt_op copc;
1463                 struct crypt_aead aeadc;
1464                 struct crypt_kop kopc;
1465 #endif
1466         } thunk;
1467 #ifdef COMPAT_FREEBSD32
1468         u_long cmd32;
1469         void *data32;
1470
1471         cmd32 = 0;
1472         data32 = NULL;
1473         switch (cmd) {
1474         case CIOCGSESSION32:
1475                 cmd32 = cmd;
1476                 data32 = data;
1477                 cmd = CIOCGSESSION;
1478                 data = (void *)&thunk.sopc;
1479                 session_op_from_32((struct session_op32 *)data32, &thunk.sopc);
1480                 break;
1481         case CIOCGSESSION232:
1482                 cmd32 = cmd;
1483                 data32 = data;
1484                 cmd = CIOCGSESSION2;
1485                 data = (void *)&thunk.sopc;
1486                 session2_op_from_32((struct session2_op32 *)data32,
1487                     &thunk.sopc);
1488                 break;
1489         case CIOCCRYPT32:
1490                 cmd32 = cmd;
1491                 data32 = data;
1492                 cmd = CIOCCRYPT;
1493                 data = (void *)&thunk.copc;
1494                 crypt_op_from_32((struct crypt_op32 *)data32, &thunk.copc);
1495                 break;
1496         case CIOCCRYPTAEAD32:
1497                 cmd32 = cmd;
1498                 data32 = data;
1499                 cmd = CIOCCRYPTAEAD;
1500                 data = (void *)&thunk.aeadc;
1501                 crypt_aead_from_32((struct crypt_aead32 *)data32, &thunk.aeadc);
1502                 break;
1503         case CIOCKEY32:
1504         case CIOCKEY232:
1505                 cmd32 = cmd;
1506                 data32 = data;
1507                 if (cmd == CIOCKEY32)
1508                         cmd = CIOCKEY;
1509                 else
1510                         cmd = CIOCKEY2;
1511                 data = (void *)&thunk.kopc;
1512                 crypt_kop_from_32((struct crypt_kop32 *)data32, &thunk.kopc);
1513                 break;
1514         }
1515 #endif
1516
1517         devfs_get_cdevpriv((void **)&fcr);
1518
1519         switch (cmd) {
1520 #ifdef COMPAT_FREEBSD12
1521         case CRIOGET:
1522                 /*
1523                  * NB: This may fail in cases that the old
1524                  * implementation did not if the current process has
1525                  * restricted filesystem access (e.g. running in a
1526                  * jail that does not expose /dev/crypto or in
1527                  * capability mode).
1528                  */
1529                 error = kern_openat(td, AT_FDCWD, "/dev/crypto", UIO_SYSSPACE,
1530                     O_RDWR, 0);
1531                 if (error == 0)
1532                         *(uint32_t *)data = td->td_retval[0];
1533                 break;
1534 #endif
1535         case CIOCGSESSION:
1536         case CIOCGSESSION2:
1537                 if (cmd == CIOCGSESSION) {
1538                         session2_op_from_op((void *)data, &thunk.sopc);
1539                         sop = &thunk.sopc;
1540                 } else
1541                         sop = (struct session2_op *)data;
1542
1543                 error = cse_create(fcr, sop);
1544                 if (cmd == CIOCGSESSION && error == 0)
1545                         session2_op_to_op(sop, (void *)data);
1546                 break;
1547         case CIOCFSESSION:
1548                 ses = *(uint32_t *)data;
1549                 if (!cse_delete(fcr, ses)) {
1550                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1551                         return (EINVAL);
1552                 }
1553                 break;
1554         case CIOCCRYPT:
1555                 cop = (struct crypt_op *)data;
1556                 cse = cse_find(fcr, cop->ses);
1557                 if (cse == NULL) {
1558                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1559                         return (EINVAL);
1560                 }
1561                 error = cryptodev_op(cse, cop);
1562                 cse_free(cse);
1563                 break;
1564         case CIOCKEY:
1565         case CIOCKEY2:
1566                 if (ratecheck(&keywarn, &warninterval))
1567                         gone_in(14,
1568                             "Asymmetric crypto operations via /dev/crypto");
1569
1570                 if (!crypto_userasymcrypto) {
1571                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1572                         return (EPERM);         /* XXX compat? */
1573                 }
1574                 kop = (struct crypt_kop *)data;
1575                 if (cmd == CIOCKEY) {
1576                         /* NB: crypto core enforces s/w driver use */
1577                         kop->crk_crid =
1578                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
1579                 }
1580                 mtx_lock(&Giant);
1581                 error = cryptodev_key(kop);
1582                 mtx_unlock(&Giant);
1583                 break;
1584         case CIOCASYMFEAT:
1585                 if (ratecheck(&featwarn, &warninterval))
1586                         gone_in(14,
1587                             "Asymmetric crypto features via /dev/crypto");
1588
1589                 if (!crypto_userasymcrypto) {
1590                         /*
1591                          * NB: if user asym crypto operations are
1592                          * not permitted return "no algorithms"
1593                          * so well-behaved applications will just
1594                          * fallback to doing them in software.
1595                          */
1596                         *(int *)data = 0;
1597                 } else {
1598                         error = crypto_getfeat((int *)data);
1599                         if (error)
1600                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
1601                                     __LINE__);
1602                 }
1603                 break;
1604         case CIOCFINDDEV:
1605                 error = cryptodev_find((struct crypt_find_op *)data);
1606                 break;
1607         case CIOCCRYPTAEAD:
1608                 caead = (struct crypt_aead *)data;
1609                 cse = cse_find(fcr, caead->ses);
1610                 if (cse == NULL) {
1611                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1612                         return (EINVAL);
1613                 }
1614                 error = cryptodev_aead(cse, caead);
1615                 cse_free(cse);
1616                 break;
1617         default:
1618                 error = EINVAL;
1619                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
1620                 break;
1621         }
1622
1623 #ifdef COMPAT_FREEBSD32
1624         switch (cmd32) {
1625         case CIOCGSESSION32:
1626                 if (error == 0)
1627                         session_op_to_32((void *)data, data32);
1628                 break;
1629         case CIOCGSESSION232:
1630                 if (error == 0)
1631                         session2_op_to_32((void *)data, data32);
1632                 break;
1633         case CIOCCRYPT32:
1634                 if (error == 0)
1635                         crypt_op_to_32((void *)data, data32);
1636                 break;
1637         case CIOCCRYPTAEAD32:
1638                 if (error == 0)
1639                         crypt_aead_to_32((void *)data, data32);
1640                 break;
1641         case CIOCKEY32:
1642         case CIOCKEY232:
1643                 crypt_kop_to_32((void *)data, data32);
1644                 break;
1645         }
1646 #endif
1647         return (error);
1648 }
1649
1650 static struct cdevsw crypto_cdevsw = {
1651         .d_version =    D_VERSION,
1652         .d_open =       crypto_open,
1653         .d_ioctl =      crypto_ioctl,
1654         .d_name =       "crypto",
1655 };
1656 static struct cdev *crypto_dev;
1657
1658 /*
1659  * Initialization code, both for static and dynamic loading.
1660  */
1661 static int
1662 cryptodev_modevent(module_t mod, int type, void *unused)
1663 {
1664         switch (type) {
1665         case MOD_LOAD:
1666                 if (bootverbose)
1667                         printf("crypto: <crypto device>\n");
1668                 crypto_dev = make_dev(&crypto_cdevsw, 0,
1669                                       UID_ROOT, GID_WHEEL, 0666,
1670                                       "crypto");
1671                 return 0;
1672         case MOD_UNLOAD:
1673                 /*XXX disallow if active sessions */
1674                 destroy_dev(crypto_dev);
1675                 return 0;
1676         }
1677         return EINVAL;
1678 }
1679
1680 static moduledata_t cryptodev_mod = {
1681         "cryptodev",
1682         cryptodev_modevent,
1683         0
1684 };
1685 MODULE_VERSION(cryptodev, 1);
1686 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
1687 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
1688 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);