1 /* $OpenBSD: softraid_crypto.c,v 1.122 2015/07/27 04:11:58 halex Exp $ */ 2 /* 3 * Copyright (c) 2007 Marco Peereboom <marco@peereboom.us> 4 * Copyright (c) 2008 Hans-Joerg Hoexer <hshoexer@openbsd.org> 5 * Copyright (c) 2008 Damien Miller <djm@mindrot.org> 6 * Copyright (c) 2009 Joel Sing <jsing@openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include "bio.h" 22 23 #include <sys/param.h> 24 #include <sys/systm.h> 25 #include <sys/buf.h> 26 #include <sys/device.h> 27 #include <sys/ioctl.h> 28 #include <sys/malloc.h> 29 #include <sys/pool.h> 30 #include <sys/kernel.h> 31 #include <sys/disk.h> 32 #include <sys/rwlock.h> 33 #include <sys/queue.h> 34 #include <sys/fcntl.h> 35 #include <sys/disklabel.h> 36 #include <sys/vnode.h> 37 #include <sys/mount.h> 38 #include <sys/sensors.h> 39 #include <sys/stat.h> 40 #include <sys/conf.h> 41 #include <sys/uio.h> 42 #include <sys/dkio.h> 43 44 #include <crypto/cryptodev.h> 45 #include <crypto/rijndael.h> 46 #include <crypto/md5.h> 47 #include <crypto/sha1.h> 48 #include <crypto/sha2.h> 49 #include <crypto/hmac.h> 50 51 #include <scsi/scsi_all.h> 52 #include <scsi/scsiconf.h> 53 #include <scsi/scsi_disk.h> 54 55 #include <dev/softraidvar.h> 56 57 /* 58 * The per-I/O data that we need to preallocate. We cannot afford to allow I/O 59 * to start failing when memory pressure kicks in. We can store this in the WU 60 * because we assert that only one ccb per WU will ever be active. 61 */ 62 struct sr_crypto_wu { 63 struct sr_workunit cr_wu; /* Must be first. */ 64 struct uio cr_uio; 65 struct iovec cr_iov; 66 struct cryptop *cr_crp; 67 struct cryptodesc *cr_descs; 68 void *cr_dmabuf; 69 }; 70 71 72 struct sr_crypto_wu *sr_crypto_prepare(struct sr_workunit *, int); 73 int sr_crypto_create_keys(struct sr_discipline *); 74 int sr_crypto_get_kdf(struct bioc_createraid *, 75 struct sr_discipline *); 76 int sr_crypto_decrypt(u_char *, u_char *, u_char *, size_t, int); 77 int sr_crypto_encrypt(u_char *, u_char *, u_char *, size_t, int); 78 int sr_crypto_decrypt_key(struct sr_discipline *); 79 int sr_crypto_change_maskkey(struct sr_discipline *, 80 struct sr_crypto_kdfinfo *, struct sr_crypto_kdfinfo *); 81 int sr_crypto_create(struct sr_discipline *, 82 struct bioc_createraid *, int, int64_t); 83 int sr_crypto_assemble(struct sr_discipline *, 84 struct bioc_createraid *, int, void *); 85 int sr_crypto_alloc_resources(struct sr_discipline *); 86 void sr_crypto_free_resources(struct sr_discipline *); 87 int sr_crypto_ioctl(struct sr_discipline *, 88 struct bioc_discipline *); 89 int sr_crypto_meta_opt_handler(struct sr_discipline *, 90 struct sr_meta_opt_hdr *); 91 int sr_crypto_write(struct cryptop *); 92 int sr_crypto_rw(struct sr_workunit *); 93 int sr_crypto_dev_rw(struct sr_workunit *, struct sr_crypto_wu *); 94 void sr_crypto_done(struct sr_workunit *); 95 int sr_crypto_read(struct cryptop *); 96 void sr_crypto_calculate_check_hmac_sha1(u_int8_t *, int, 97 u_int8_t *, int, u_char *); 98 void sr_crypto_hotplug(struct sr_discipline *, struct disk *, int); 99 100 #ifdef SR_DEBUG0 101 void sr_crypto_dumpkeys(struct sr_discipline *); 102 #endif 103 104 /* Discipline initialisation. */ 105 void 106 sr_crypto_discipline_init(struct sr_discipline *sd) 107 { 108 int i; 109 110 /* Fill out discipline members. */ 111 sd->sd_type = SR_MD_CRYPTO; 112 strlcpy(sd->sd_name, "CRYPTO", sizeof(sd->sd_name)); 113 sd->sd_capabilities = SR_CAP_SYSTEM_DISK | SR_CAP_AUTO_ASSEMBLE; 114 sd->sd_max_wu = SR_CRYPTO_NOWU; 115 116 for (i = 0; i < SR_CRYPTO_MAXKEYS; i++) 117 sd->mds.mdd_crypto.scr_sid[i] = (u_int64_t)-1; 118 119 /* Setup discipline specific function pointers. */ 120 sd->sd_alloc_resources = sr_crypto_alloc_resources; 121 sd->sd_assemble = sr_crypto_assemble; 122 sd->sd_create = sr_crypto_create; 123 sd->sd_free_resources = sr_crypto_free_resources; 124 sd->sd_ioctl_handler = sr_crypto_ioctl; 125 sd->sd_meta_opt_handler = sr_crypto_meta_opt_handler; 126 sd->sd_scsi_rw = sr_crypto_rw; 127 sd->sd_scsi_done = sr_crypto_done; 128 } 129 130 int 131 sr_crypto_create(struct sr_discipline *sd, struct bioc_createraid *bc, 132 int no_chunk, int64_t coerced_size) 133 { 134 struct sr_meta_opt_item *omi; 135 int rv = EINVAL; 136 137 if (no_chunk != 1) { 138 sr_error(sd->sd_sc, "%s requires exactly one chunk", 139 sd->sd_name); 140 goto done; 141 } 142 143 /* Create crypto optional metadata. */ 144 omi = malloc(sizeof(struct sr_meta_opt_item), M_DEVBUF, 145 M_WAITOK | M_ZERO); 146 omi->omi_som = malloc(sizeof(struct sr_meta_crypto), M_DEVBUF, 147 M_WAITOK | M_ZERO); 148 omi->omi_som->som_type = SR_OPT_CRYPTO; 149 omi->omi_som->som_length = sizeof(struct sr_meta_crypto); 150 SLIST_INSERT_HEAD(&sd->sd_meta_opt, omi, omi_link); 151 sd->mds.mdd_crypto.scr_meta = (struct sr_meta_crypto *)omi->omi_som; 152 sd->sd_meta->ssdi.ssd_opt_no++; 153 154 sd->mds.mdd_crypto.key_disk = NULL; 155 156 if (bc->bc_key_disk != NODEV) { 157 158 /* Create a key disk. */ 159 if (sr_crypto_get_kdf(bc, sd)) 160 goto done; 161 sd->mds.mdd_crypto.key_disk = 162 sr_crypto_create_key_disk(sd, bc->bc_key_disk); 163 if (sd->mds.mdd_crypto.key_disk == NULL) 164 goto done; 165 sd->sd_capabilities |= SR_CAP_AUTO_ASSEMBLE; 166 167 } else if (bc->bc_opaque_flags & BIOC_SOOUT) { 168 169 /* No hint available yet. */ 170 bc->bc_opaque_status = BIOC_SOINOUT_FAILED; 171 rv = EAGAIN; 172 goto done; 173 174 } else if (sr_crypto_get_kdf(bc, sd)) 175 goto done; 176 177 /* Passphrase volumes cannot be automatically assembled. */ 178 if (!(bc->bc_flags & BIOC_SCNOAUTOASSEMBLE) && bc->bc_key_disk == NODEV) 179 goto done; 180 181 sd->sd_meta->ssdi.ssd_size = coerced_size; 182 183 sr_crypto_create_keys(sd); 184 185 sd->sd_max_ccb_per_wu = no_chunk; 186 187 rv = 0; 188 done: 189 return (rv); 190 } 191 192 int 193 sr_crypto_assemble(struct sr_discipline *sd, struct bioc_createraid *bc, 194 int no_chunk, void *data) 195 { 196 int rv = EINVAL; 197 198 sd->mds.mdd_crypto.key_disk = NULL; 199 200 /* Crypto optional metadata must already exist... */ 201 if (sd->mds.mdd_crypto.scr_meta == NULL) 202 goto done; 203 204 if (data != NULL) { 205 /* Kernel already has mask key. */ 206 memcpy(sd->mds.mdd_crypto.scr_maskkey, data, 207 sizeof(sd->mds.mdd_crypto.scr_maskkey)); 208 } else if (bc->bc_key_disk != NODEV) { 209 /* Read the mask key from the key disk. */ 210 sd->mds.mdd_crypto.key_disk = 211 sr_crypto_read_key_disk(sd, bc->bc_key_disk); 212 if (sd->mds.mdd_crypto.key_disk == NULL) 213 goto done; 214 } else if (bc->bc_opaque_flags & BIOC_SOOUT) { 215 /* provide userland with kdf hint */ 216 if (bc->bc_opaque == NULL) 217 goto done; 218 219 if (sizeof(sd->mds.mdd_crypto.scr_meta->scm_kdfhint) < 220 bc->bc_opaque_size) 221 goto done; 222 223 if (copyout(sd->mds.mdd_crypto.scr_meta->scm_kdfhint, 224 bc->bc_opaque, bc->bc_opaque_size)) 225 goto done; 226 227 /* we're done */ 228 bc->bc_opaque_status = BIOC_SOINOUT_OK; 229 rv = EAGAIN; 230 goto done; 231 } else if (bc->bc_opaque_flags & BIOC_SOIN) { 232 /* get kdf with maskkey from userland */ 233 if (sr_crypto_get_kdf(bc, sd)) 234 goto done; 235 } else 236 goto done; 237 238 sd->sd_max_ccb_per_wu = sd->sd_meta->ssdi.ssd_chunk_no; 239 240 rv = 0; 241 done: 242 return (rv); 243 } 244 245 struct sr_crypto_wu * 246 sr_crypto_prepare(struct sr_workunit *wu, int encrypt) 247 { 248 struct scsi_xfer *xs = wu->swu_xs; 249 struct sr_discipline *sd = wu->swu_dis; 250 struct sr_crypto_wu *crwu; 251 struct cryptodesc *crd; 252 int flags, i, n; 253 daddr_t blkno; 254 u_int keyndx; 255 256 DNPRINTF(SR_D_DIS, "%s: sr_crypto_prepare wu %p encrypt %d\n", 257 DEVNAME(sd->sd_sc), wu, encrypt); 258 259 crwu = (struct sr_crypto_wu *)wu; 260 crwu->cr_uio.uio_iovcnt = 1; 261 crwu->cr_uio.uio_iov->iov_len = xs->datalen; 262 if (xs->flags & SCSI_DATA_OUT) { 263 crwu->cr_uio.uio_iov->iov_base = crwu->cr_dmabuf; 264 memcpy(crwu->cr_uio.uio_iov->iov_base, xs->data, xs->datalen); 265 } else 266 crwu->cr_uio.uio_iov->iov_base = xs->data; 267 268 blkno = wu->swu_blk_start; 269 n = xs->datalen >> DEV_BSHIFT; 270 271 /* 272 * We preallocated enough crypto descs for up to MAXPHYS of I/O. 273 * Since there may be less than that we need to tweak the linked list 274 * of crypto desc structures to be just long enough for our needs. 275 */ 276 crd = crwu->cr_descs; 277 for (i = 0; i < ((MAXPHYS >> DEV_BSHIFT) - n); i++) { 278 crd = crd->crd_next; 279 KASSERT(crd); 280 } 281 crwu->cr_crp->crp_desc = crd; 282 flags = (encrypt ? CRD_F_ENCRYPT : 0) | 283 CRD_F_IV_PRESENT | CRD_F_IV_EXPLICIT; 284 285 /* 286 * Select crypto session based on block number. 287 * 288 * XXX - this does not handle the case where the read/write spans 289 * across a different key blocks (e.g. 0.5TB boundary). Currently 290 * this is already broken by the use of scr_key[0] below. 291 */ 292 keyndx = blkno >> SR_CRYPTO_KEY_BLKSHIFT; 293 crwu->cr_crp->crp_sid = sd->mds.mdd_crypto.scr_sid[keyndx]; 294 295 crwu->cr_crp->crp_opaque = crwu; 296 crwu->cr_crp->crp_ilen = xs->datalen; 297 crwu->cr_crp->crp_alloctype = M_DEVBUF; 298 crwu->cr_crp->crp_buf = &crwu->cr_uio; 299 for (i = 0, crd = crwu->cr_crp->crp_desc; crd; 300 i++, blkno++, crd = crd->crd_next) { 301 crd->crd_skip = i << DEV_BSHIFT; 302 crd->crd_len = DEV_BSIZE; 303 crd->crd_inject = 0; 304 crd->crd_flags = flags; 305 crd->crd_alg = sd->mds.mdd_crypto.scr_alg; 306 crd->crd_klen = sd->mds.mdd_crypto.scr_klen; 307 crd->crd_key = sd->mds.mdd_crypto.scr_key[0]; 308 memcpy(crd->crd_iv, &blkno, sizeof(blkno)); 309 } 310 311 return (crwu); 312 } 313 314 int 315 sr_crypto_get_kdf(struct bioc_createraid *bc, struct sr_discipline *sd) 316 { 317 int rv = EINVAL; 318 struct sr_crypto_kdfinfo *kdfinfo; 319 320 if (!(bc->bc_opaque_flags & BIOC_SOIN)) 321 return (rv); 322 if (bc->bc_opaque == NULL) 323 return (rv); 324 if (bc->bc_opaque_size != sizeof(*kdfinfo)) 325 return (rv); 326 327 kdfinfo = malloc(bc->bc_opaque_size, M_DEVBUF, M_WAITOK | M_ZERO); 328 if (copyin(bc->bc_opaque, kdfinfo, bc->bc_opaque_size)) 329 goto out; 330 331 if (kdfinfo->len != bc->bc_opaque_size) 332 goto out; 333 334 /* copy KDF hint to disk meta data */ 335 if (kdfinfo->flags & SR_CRYPTOKDF_HINT) { 336 if (sizeof(sd->mds.mdd_crypto.scr_meta->scm_kdfhint) < 337 kdfinfo->genkdf.len) 338 goto out; 339 memcpy(sd->mds.mdd_crypto.scr_meta->scm_kdfhint, 340 &kdfinfo->genkdf, kdfinfo->genkdf.len); 341 } 342 343 /* copy mask key to run-time meta data */ 344 if ((kdfinfo->flags & SR_CRYPTOKDF_KEY)) { 345 if (sizeof(sd->mds.mdd_crypto.scr_maskkey) < 346 sizeof(kdfinfo->maskkey)) 347 goto out; 348 memcpy(sd->mds.mdd_crypto.scr_maskkey, &kdfinfo->maskkey, 349 sizeof(kdfinfo->maskkey)); 350 } 351 352 bc->bc_opaque_status = BIOC_SOINOUT_OK; 353 rv = 0; 354 out: 355 explicit_bzero(kdfinfo, bc->bc_opaque_size); 356 free(kdfinfo, M_DEVBUF, bc->bc_opaque_size); 357 358 return (rv); 359 } 360 361 int 362 sr_crypto_encrypt(u_char *p, u_char *c, u_char *key, size_t size, int alg) 363 { 364 rijndael_ctx ctx; 365 int i, rv = 1; 366 367 switch (alg) { 368 case SR_CRYPTOM_AES_ECB_256: 369 if (rijndael_set_key_enc_only(&ctx, key, 256) != 0) 370 goto out; 371 for (i = 0; i < size; i += RIJNDAEL128_BLOCK_LEN) 372 rijndael_encrypt(&ctx, &p[i], &c[i]); 373 rv = 0; 374 break; 375 default: 376 DNPRINTF(SR_D_DIS, "%s: unsupported encryption algorithm %d\n", 377 "softraid", alg); 378 rv = -1; 379 goto out; 380 } 381 382 out: 383 explicit_bzero(&ctx, sizeof(ctx)); 384 return (rv); 385 } 386 387 int 388 sr_crypto_decrypt(u_char *c, u_char *p, u_char *key, size_t size, int alg) 389 { 390 rijndael_ctx ctx; 391 int i, rv = 1; 392 393 switch (alg) { 394 case SR_CRYPTOM_AES_ECB_256: 395 if (rijndael_set_key(&ctx, key, 256) != 0) 396 goto out; 397 for (i = 0; i < size; i += RIJNDAEL128_BLOCK_LEN) 398 rijndael_decrypt(&ctx, &c[i], &p[i]); 399 rv = 0; 400 break; 401 default: 402 DNPRINTF(SR_D_DIS, "%s: unsupported encryption algorithm %d\n", 403 "softraid", alg); 404 rv = -1; 405 goto out; 406 } 407 408 out: 409 explicit_bzero(&ctx, sizeof(ctx)); 410 return (rv); 411 } 412 413 void 414 sr_crypto_calculate_check_hmac_sha1(u_int8_t *maskkey, int maskkey_size, 415 u_int8_t *key, int key_size, u_char *check_digest) 416 { 417 u_char check_key[SHA1_DIGEST_LENGTH]; 418 HMAC_SHA1_CTX hmacctx; 419 SHA1_CTX shactx; 420 421 bzero(check_key, sizeof(check_key)); 422 bzero(&hmacctx, sizeof(hmacctx)); 423 bzero(&shactx, sizeof(shactx)); 424 425 /* k = SHA1(mask_key) */ 426 SHA1Init(&shactx); 427 SHA1Update(&shactx, maskkey, maskkey_size); 428 SHA1Final(check_key, &shactx); 429 430 /* mac = HMAC_SHA1_k(unencrypted key) */ 431 HMAC_SHA1_Init(&hmacctx, check_key, sizeof(check_key)); 432 HMAC_SHA1_Update(&hmacctx, key, key_size); 433 HMAC_SHA1_Final(check_digest, &hmacctx); 434 435 explicit_bzero(check_key, sizeof(check_key)); 436 explicit_bzero(&hmacctx, sizeof(hmacctx)); 437 explicit_bzero(&shactx, sizeof(shactx)); 438 } 439 440 int 441 sr_crypto_decrypt_key(struct sr_discipline *sd) 442 { 443 u_char check_digest[SHA1_DIGEST_LENGTH]; 444 int rv = 1; 445 446 DNPRINTF(SR_D_DIS, "%s: sr_crypto_decrypt_key\n", DEVNAME(sd->sd_sc)); 447 448 if (sd->mds.mdd_crypto.scr_meta->scm_check_alg != SR_CRYPTOC_HMAC_SHA1) 449 goto out; 450 451 if (sr_crypto_decrypt((u_char *)sd->mds.mdd_crypto.scr_meta->scm_key, 452 (u_char *)sd->mds.mdd_crypto.scr_key, 453 sd->mds.mdd_crypto.scr_maskkey, sizeof(sd->mds.mdd_crypto.scr_key), 454 sd->mds.mdd_crypto.scr_meta->scm_mask_alg) == -1) 455 goto out; 456 457 #ifdef SR_DEBUG0 458 sr_crypto_dumpkeys(sd); 459 #endif 460 461 /* Check that the key decrypted properly. */ 462 sr_crypto_calculate_check_hmac_sha1(sd->mds.mdd_crypto.scr_maskkey, 463 sizeof(sd->mds.mdd_crypto.scr_maskkey), 464 (u_int8_t *)sd->mds.mdd_crypto.scr_key, 465 sizeof(sd->mds.mdd_crypto.scr_key), 466 check_digest); 467 if (memcmp(sd->mds.mdd_crypto.scr_meta->chk_hmac_sha1.sch_mac, 468 check_digest, sizeof(check_digest)) != 0) { 469 explicit_bzero(sd->mds.mdd_crypto.scr_key, 470 sizeof(sd->mds.mdd_crypto.scr_key)); 471 goto out; 472 } 473 474 rv = 0; /* Success */ 475 out: 476 /* we don't need the mask key anymore */ 477 explicit_bzero(&sd->mds.mdd_crypto.scr_maskkey, 478 sizeof(sd->mds.mdd_crypto.scr_maskkey)); 479 480 explicit_bzero(check_digest, sizeof(check_digest)); 481 482 return rv; 483 } 484 485 int 486 sr_crypto_create_keys(struct sr_discipline *sd) 487 { 488 489 DNPRINTF(SR_D_DIS, "%s: sr_crypto_create_keys\n", 490 DEVNAME(sd->sd_sc)); 491 492 if (AES_MAXKEYBYTES < sizeof(sd->mds.mdd_crypto.scr_maskkey)) 493 return (1); 494 495 /* XXX allow user to specify */ 496 sd->mds.mdd_crypto.scr_meta->scm_alg = SR_CRYPTOA_AES_XTS_256; 497 498 /* generate crypto keys */ 499 arc4random_buf(sd->mds.mdd_crypto.scr_key, 500 sizeof(sd->mds.mdd_crypto.scr_key)); 501 502 /* Mask the disk keys. */ 503 sd->mds.mdd_crypto.scr_meta->scm_mask_alg = SR_CRYPTOM_AES_ECB_256; 504 sr_crypto_encrypt((u_char *)sd->mds.mdd_crypto.scr_key, 505 (u_char *)sd->mds.mdd_crypto.scr_meta->scm_key, 506 sd->mds.mdd_crypto.scr_maskkey, sizeof(sd->mds.mdd_crypto.scr_key), 507 sd->mds.mdd_crypto.scr_meta->scm_mask_alg); 508 509 /* Prepare key decryption check code. */ 510 sd->mds.mdd_crypto.scr_meta->scm_check_alg = SR_CRYPTOC_HMAC_SHA1; 511 sr_crypto_calculate_check_hmac_sha1(sd->mds.mdd_crypto.scr_maskkey, 512 sizeof(sd->mds.mdd_crypto.scr_maskkey), 513 (u_int8_t *)sd->mds.mdd_crypto.scr_key, 514 sizeof(sd->mds.mdd_crypto.scr_key), 515 sd->mds.mdd_crypto.scr_meta->chk_hmac_sha1.sch_mac); 516 517 /* Erase the plaintext disk keys */ 518 explicit_bzero(sd->mds.mdd_crypto.scr_key, 519 sizeof(sd->mds.mdd_crypto.scr_key)); 520 521 #ifdef SR_DEBUG0 522 sr_crypto_dumpkeys(sd); 523 #endif 524 525 sd->mds.mdd_crypto.scr_meta->scm_flags = SR_CRYPTOF_KEY | 526 SR_CRYPTOF_KDFHINT; 527 528 return (0); 529 } 530 531 int 532 sr_crypto_change_maskkey(struct sr_discipline *sd, 533 struct sr_crypto_kdfinfo *kdfinfo1, struct sr_crypto_kdfinfo *kdfinfo2) 534 { 535 u_char check_digest[SHA1_DIGEST_LENGTH]; 536 u_char *c, *p = NULL; 537 size_t ksz; 538 int rv = 1; 539 540 DNPRINTF(SR_D_DIS, "%s: sr_crypto_change_maskkey\n", 541 DEVNAME(sd->sd_sc)); 542 543 if (sd->mds.mdd_crypto.scr_meta->scm_check_alg != SR_CRYPTOC_HMAC_SHA1) 544 goto out; 545 546 c = (u_char *)sd->mds.mdd_crypto.scr_meta->scm_key; 547 ksz = sizeof(sd->mds.mdd_crypto.scr_key); 548 p = malloc(ksz, M_DEVBUF, M_WAITOK | M_CANFAIL | M_ZERO); 549 if (p == NULL) 550 goto out; 551 552 if (sr_crypto_decrypt(c, p, kdfinfo1->maskkey, ksz, 553 sd->mds.mdd_crypto.scr_meta->scm_mask_alg) == -1) 554 goto out; 555 556 #ifdef SR_DEBUG0 557 sr_crypto_dumpkeys(sd); 558 #endif 559 560 sr_crypto_calculate_check_hmac_sha1(kdfinfo1->maskkey, 561 sizeof(kdfinfo1->maskkey), p, ksz, check_digest); 562 if (memcmp(sd->mds.mdd_crypto.scr_meta->chk_hmac_sha1.sch_mac, 563 check_digest, sizeof(check_digest)) != 0) { 564 sr_error(sd->sd_sc, "incorrect key or passphrase"); 565 rv = EPERM; 566 goto out; 567 } 568 569 /* Mask the disk keys. */ 570 c = (u_char *)sd->mds.mdd_crypto.scr_meta->scm_key; 571 if (sr_crypto_encrypt(p, c, kdfinfo2->maskkey, ksz, 572 sd->mds.mdd_crypto.scr_meta->scm_mask_alg) == -1) 573 goto out; 574 575 /* Prepare key decryption check code. */ 576 sd->mds.mdd_crypto.scr_meta->scm_check_alg = SR_CRYPTOC_HMAC_SHA1; 577 sr_crypto_calculate_check_hmac_sha1(kdfinfo2->maskkey, 578 sizeof(kdfinfo2->maskkey), (u_int8_t *)sd->mds.mdd_crypto.scr_key, 579 sizeof(sd->mds.mdd_crypto.scr_key), check_digest); 580 581 /* Copy new encrypted key and HMAC to metadata. */ 582 memcpy(sd->mds.mdd_crypto.scr_meta->chk_hmac_sha1.sch_mac, check_digest, 583 sizeof(sd->mds.mdd_crypto.scr_meta->chk_hmac_sha1.sch_mac)); 584 585 rv = 0; /* Success */ 586 587 out: 588 if (p) { 589 explicit_bzero(p, ksz); 590 free(p, M_DEVBUF, ksz); 591 } 592 593 explicit_bzero(check_digest, sizeof(check_digest)); 594 explicit_bzero(&kdfinfo1->maskkey, sizeof(kdfinfo1->maskkey)); 595 explicit_bzero(&kdfinfo2->maskkey, sizeof(kdfinfo2->maskkey)); 596 597 return (rv); 598 } 599 600 struct sr_chunk * 601 sr_crypto_create_key_disk(struct sr_discipline *sd, dev_t dev) 602 { 603 struct sr_softc *sc = sd->sd_sc; 604 struct sr_discipline *fakesd = NULL; 605 struct sr_metadata *sm = NULL; 606 struct sr_meta_chunk *km; 607 struct sr_meta_opt_item *omi = NULL; 608 struct sr_meta_keydisk *skm; 609 struct sr_chunk *key_disk = NULL; 610 struct disklabel label; 611 struct vnode *vn; 612 char devname[32]; 613 int c, part, open = 0; 614 615 /* 616 * Create a metadata structure on the key disk and store 617 * keying material in the optional metadata. 618 */ 619 620 sr_meta_getdevname(sc, dev, devname, sizeof(devname)); 621 622 /* Make sure chunk is not already in use. */ 623 c = sr_chunk_in_use(sc, dev); 624 if (c != BIOC_SDINVALID && c != BIOC_SDOFFLINE) { 625 sr_error(sc, "%s is already in use", devname); 626 goto done; 627 } 628 629 /* Open device. */ 630 if (bdevvp(dev, &vn)) { 631 sr_error(sc, "cannot open key disk %s", devname); 632 goto done; 633 } 634 if (VOP_OPEN(vn, FREAD | FWRITE, NOCRED, curproc)) { 635 DNPRINTF(SR_D_META,"%s: sr_crypto_create_key_disk cannot " 636 "open %s\n", DEVNAME(sc), devname); 637 vput(vn); 638 goto fail; 639 } 640 open = 1; /* close dev on error */ 641 642 /* Get partition details. */ 643 part = DISKPART(dev); 644 if (VOP_IOCTL(vn, DIOCGDINFO, (caddr_t)&label, 645 FREAD, NOCRED, curproc)) { 646 DNPRINTF(SR_D_META, "%s: sr_crypto_create_key_disk ioctl " 647 "failed\n", DEVNAME(sc)); 648 VOP_CLOSE(vn, FREAD | FWRITE, NOCRED, curproc); 649 vput(vn); 650 goto fail; 651 } 652 if (label.d_secsize != DEV_BSIZE) { 653 sr_error(sc, "%s has unsupported sector size (%d)", 654 devname, label.d_secsize); 655 goto fail; 656 } 657 if (label.d_partitions[part].p_fstype != FS_RAID) { 658 sr_error(sc, "%s partition not of type RAID (%d)", 659 devname, label.d_partitions[part].p_fstype); 660 goto fail; 661 } 662 663 /* 664 * Create and populate chunk metadata. 665 */ 666 667 key_disk = malloc(sizeof(struct sr_chunk), M_DEVBUF, M_WAITOK | M_ZERO); 668 km = &key_disk->src_meta; 669 670 key_disk->src_dev_mm = dev; 671 key_disk->src_vn = vn; 672 strlcpy(key_disk->src_devname, devname, sizeof(km->scmi.scm_devname)); 673 key_disk->src_size = 0; 674 675 km->scmi.scm_volid = sd->sd_meta->ssdi.ssd_level; 676 km->scmi.scm_chunk_id = 0; 677 km->scmi.scm_size = 0; 678 km->scmi.scm_coerced_size = 0; 679 strlcpy(km->scmi.scm_devname, devname, sizeof(km->scmi.scm_devname)); 680 memcpy(&km->scmi.scm_uuid, &sd->sd_meta->ssdi.ssd_uuid, 681 sizeof(struct sr_uuid)); 682 683 sr_checksum(sc, km, &km->scm_checksum, 684 sizeof(struct sr_meta_chunk_invariant)); 685 686 km->scm_status = BIOC_SDONLINE; 687 688 /* 689 * Create and populate our own discipline and metadata. 690 */ 691 692 sm = malloc(sizeof(struct sr_metadata), M_DEVBUF, M_WAITOK | M_ZERO); 693 sm->ssdi.ssd_magic = SR_MAGIC; 694 sm->ssdi.ssd_version = SR_META_VERSION; 695 sm->ssd_ondisk = 0; 696 sm->ssdi.ssd_vol_flags = 0; 697 memcpy(&sm->ssdi.ssd_uuid, &sd->sd_meta->ssdi.ssd_uuid, 698 sizeof(struct sr_uuid)); 699 sm->ssdi.ssd_chunk_no = 1; 700 sm->ssdi.ssd_volid = SR_KEYDISK_VOLID; 701 sm->ssdi.ssd_level = SR_KEYDISK_LEVEL; 702 sm->ssdi.ssd_size = 0; 703 strlcpy(sm->ssdi.ssd_vendor, "OPENBSD", sizeof(sm->ssdi.ssd_vendor)); 704 snprintf(sm->ssdi.ssd_product, sizeof(sm->ssdi.ssd_product), 705 "SR %s", "KEYDISK"); 706 snprintf(sm->ssdi.ssd_revision, sizeof(sm->ssdi.ssd_revision), 707 "%03d", SR_META_VERSION); 708 709 fakesd = malloc(sizeof(struct sr_discipline), M_DEVBUF, 710 M_WAITOK | M_ZERO); 711 fakesd->sd_sc = sd->sd_sc; 712 fakesd->sd_meta = sm; 713 fakesd->sd_meta_type = SR_META_F_NATIVE; 714 fakesd->sd_vol_status = BIOC_SVONLINE; 715 strlcpy(fakesd->sd_name, "KEYDISK", sizeof(fakesd->sd_name)); 716 SLIST_INIT(&fakesd->sd_meta_opt); 717 718 /* Add chunk to volume. */ 719 fakesd->sd_vol.sv_chunks = malloc(sizeof(struct sr_chunk *), M_DEVBUF, 720 M_WAITOK | M_ZERO); 721 fakesd->sd_vol.sv_chunks[0] = key_disk; 722 SLIST_INIT(&fakesd->sd_vol.sv_chunk_list); 723 SLIST_INSERT_HEAD(&fakesd->sd_vol.sv_chunk_list, key_disk, src_link); 724 725 /* Generate mask key. */ 726 arc4random_buf(sd->mds.mdd_crypto.scr_maskkey, 727 sizeof(sd->mds.mdd_crypto.scr_maskkey)); 728 729 /* Copy mask key to optional metadata area. */ 730 omi = malloc(sizeof(struct sr_meta_opt_item), M_DEVBUF, 731 M_WAITOK | M_ZERO); 732 omi->omi_som = malloc(sizeof(struct sr_meta_keydisk), M_DEVBUF, 733 M_WAITOK | M_ZERO); 734 omi->omi_som->som_type = SR_OPT_KEYDISK; 735 omi->omi_som->som_length = sizeof(struct sr_meta_keydisk); 736 skm = (struct sr_meta_keydisk *)omi->omi_som; 737 memcpy(&skm->skm_maskkey, sd->mds.mdd_crypto.scr_maskkey, 738 sizeof(skm->skm_maskkey)); 739 SLIST_INSERT_HEAD(&fakesd->sd_meta_opt, omi, omi_link); 740 fakesd->sd_meta->ssdi.ssd_opt_no++; 741 742 /* Save metadata. */ 743 if (sr_meta_save(fakesd, SR_META_DIRTY)) { 744 sr_error(sc, "could not save metadata to %s", devname); 745 goto fail; 746 } 747 748 goto done; 749 750 fail: 751 free(key_disk, M_DEVBUF, sizeof(struct sr_chunk)); 752 key_disk = NULL; 753 754 done: 755 free(omi, M_DEVBUF, sizeof(struct sr_meta_opt_item)); 756 if (fakesd && fakesd->sd_vol.sv_chunks) 757 free(fakesd->sd_vol.sv_chunks, M_DEVBUF, 758 sizeof(struct sr_chunk *)); 759 free(fakesd, M_DEVBUF, sizeof(struct sr_discipline)); 760 free(sm, M_DEVBUF, sizeof(struct sr_metadata)); 761 if (open) { 762 VOP_CLOSE(vn, FREAD | FWRITE, NOCRED, curproc); 763 vput(vn); 764 } 765 766 return key_disk; 767 } 768 769 struct sr_chunk * 770 sr_crypto_read_key_disk(struct sr_discipline *sd, dev_t dev) 771 { 772 struct sr_softc *sc = sd->sd_sc; 773 struct sr_metadata *sm = NULL; 774 struct sr_meta_opt_item *omi, *omi_next; 775 struct sr_meta_opt_hdr *omh; 776 struct sr_meta_keydisk *skm; 777 struct sr_meta_opt_head som; 778 struct sr_chunk *key_disk = NULL; 779 struct disklabel label; 780 struct vnode *vn = NULL; 781 char devname[32]; 782 int c, part, open = 0; 783 784 /* 785 * Load a key disk and load keying material into memory. 786 */ 787 788 SLIST_INIT(&som); 789 790 sr_meta_getdevname(sc, dev, devname, sizeof(devname)); 791 792 /* Make sure chunk is not already in use. */ 793 c = sr_chunk_in_use(sc, dev); 794 if (c != BIOC_SDINVALID && c != BIOC_SDOFFLINE) { 795 sr_error(sc, "%s is already in use", devname); 796 goto done; 797 } 798 799 /* Open device. */ 800 if (bdevvp(dev, &vn)) { 801 sr_error(sc, "cannot open key disk %s", devname); 802 goto done; 803 } 804 if (VOP_OPEN(vn, FREAD | FWRITE, NOCRED, curproc)) { 805 DNPRINTF(SR_D_META,"%s: sr_crypto_read_key_disk cannot " 806 "open %s\n", DEVNAME(sc), devname); 807 vput(vn); 808 goto done; 809 } 810 open = 1; /* close dev on error */ 811 812 /* Get partition details. */ 813 part = DISKPART(dev); 814 if (VOP_IOCTL(vn, DIOCGDINFO, (caddr_t)&label, FREAD, 815 NOCRED, curproc)) { 816 DNPRINTF(SR_D_META, "%s: sr_crypto_read_key_disk ioctl " 817 "failed\n", DEVNAME(sc)); 818 VOP_CLOSE(vn, FREAD | FWRITE, NOCRED, curproc); 819 vput(vn); 820 goto done; 821 } 822 if (label.d_secsize != DEV_BSIZE) { 823 sr_error(sc, "%s has unsupported sector size (%d)", 824 devname, label.d_secsize); 825 goto done; 826 } 827 if (label.d_partitions[part].p_fstype != FS_RAID) { 828 sr_error(sc, "%s partition not of type RAID (%d)", 829 devname, label.d_partitions[part].p_fstype); 830 goto done; 831 } 832 833 /* 834 * Read and validate key disk metadata. 835 */ 836 sm = malloc(SR_META_SIZE * DEV_BSIZE, M_DEVBUF, M_WAITOK | M_ZERO); 837 if (sr_meta_native_read(sd, dev, sm, NULL)) { 838 sr_error(sc, "native bootprobe could not read native metadata"); 839 goto done; 840 } 841 842 if (sr_meta_validate(sd, dev, sm, NULL)) { 843 DNPRINTF(SR_D_META, "%s: invalid metadata\n", 844 DEVNAME(sc)); 845 goto done; 846 } 847 848 /* Make sure this is a key disk. */ 849 if (sm->ssdi.ssd_level != SR_KEYDISK_LEVEL) { 850 sr_error(sc, "%s is not a key disk", devname); 851 goto done; 852 } 853 854 /* Construct key disk chunk. */ 855 key_disk = malloc(sizeof(struct sr_chunk), M_DEVBUF, M_WAITOK | M_ZERO); 856 key_disk->src_dev_mm = dev; 857 key_disk->src_vn = vn; 858 key_disk->src_size = 0; 859 860 memcpy(&key_disk->src_meta, (struct sr_meta_chunk *)(sm + 1), 861 sizeof(key_disk->src_meta)); 862 863 /* Read mask key from optional metadata. */ 864 sr_meta_opt_load(sc, sm, &som); 865 SLIST_FOREACH(omi, &som, omi_link) { 866 omh = omi->omi_som; 867 if (omh->som_type == SR_OPT_KEYDISK) { 868 skm = (struct sr_meta_keydisk *)omh; 869 memcpy(sd->mds.mdd_crypto.scr_maskkey, &skm->skm_maskkey, 870 sizeof(sd->mds.mdd_crypto.scr_maskkey)); 871 } else if (omh->som_type == SR_OPT_CRYPTO) { 872 /* Original keydisk format with key in crypto area. */ 873 memcpy(sd->mds.mdd_crypto.scr_maskkey, 874 omh + sizeof(struct sr_meta_opt_hdr), 875 sizeof(sd->mds.mdd_crypto.scr_maskkey)); 876 } 877 } 878 879 open = 0; 880 881 done: 882 for (omi = SLIST_FIRST(&som); omi != NULL; omi = omi_next) { 883 omi_next = SLIST_NEXT(omi, omi_link); 884 if (omi->omi_som) 885 free(omi->omi_som, M_DEVBUF, 0); 886 free(omi, M_DEVBUF, 0); 887 } 888 889 free(sm, M_DEVBUF, SR_META_SIZE * DEV_BSIZE); 890 891 if (vn && open) { 892 VOP_CLOSE(vn, FREAD, NOCRED, curproc); 893 vput(vn); 894 } 895 896 return key_disk; 897 } 898 899 int 900 sr_crypto_alloc_resources(struct sr_discipline *sd) 901 { 902 struct sr_workunit *wu; 903 struct sr_crypto_wu *crwu; 904 struct cryptoini cri; 905 u_int num_keys, i; 906 907 DNPRINTF(SR_D_DIS, "%s: sr_crypto_alloc_resources\n", 908 DEVNAME(sd->sd_sc)); 909 910 sd->mds.mdd_crypto.scr_alg = CRYPTO_AES_XTS; 911 switch (sd->mds.mdd_crypto.scr_meta->scm_alg) { 912 case SR_CRYPTOA_AES_XTS_128: 913 sd->mds.mdd_crypto.scr_klen = 256; 914 break; 915 case SR_CRYPTOA_AES_XTS_256: 916 sd->mds.mdd_crypto.scr_klen = 512; 917 break; 918 default: 919 sr_error(sd->sd_sc, "unknown crypto algorithm"); 920 return (EINVAL); 921 } 922 923 for (i = 0; i < SR_CRYPTO_MAXKEYS; i++) 924 sd->mds.mdd_crypto.scr_sid[i] = (u_int64_t)-1; 925 926 if (sr_wu_alloc(sd, sizeof(struct sr_crypto_wu))) { 927 sr_error(sd->sd_sc, "unable to allocate work units"); 928 return (ENOMEM); 929 } 930 if (sr_ccb_alloc(sd)) { 931 sr_error(sd->sd_sc, "unable to allocate CCBs"); 932 return (ENOMEM); 933 } 934 if (sr_crypto_decrypt_key(sd)) { 935 sr_error(sd->sd_sc, "incorrect key or passphrase"); 936 return (EPERM); 937 } 938 939 /* 940 * For each work unit allocate the uio, iovec and crypto structures. 941 * These have to be allocated now because during runtime we cannot 942 * fail an allocation without failing the I/O (which can cause real 943 * problems). 944 */ 945 TAILQ_FOREACH(wu, &sd->sd_wu, swu_next) { 946 crwu = (struct sr_crypto_wu *)wu; 947 crwu->cr_uio.uio_iov = &crwu->cr_iov; 948 crwu->cr_dmabuf = dma_alloc(MAXPHYS, PR_WAITOK); 949 crwu->cr_crp = crypto_getreq(MAXPHYS >> DEV_BSHIFT); 950 if (crwu->cr_crp == NULL) 951 return (ENOMEM); 952 crwu->cr_descs = crwu->cr_crp->crp_desc; 953 } 954 955 memset(&cri, 0, sizeof(cri)); 956 cri.cri_alg = sd->mds.mdd_crypto.scr_alg; 957 cri.cri_klen = sd->mds.mdd_crypto.scr_klen; 958 959 /* Allocate a session for every 2^SR_CRYPTO_KEY_BLKSHIFT blocks. */ 960 num_keys = sd->sd_meta->ssdi.ssd_size >> SR_CRYPTO_KEY_BLKSHIFT; 961 if (num_keys >= SR_CRYPTO_MAXKEYS) 962 return (EFBIG); 963 for (i = 0; i <= num_keys; i++) { 964 cri.cri_key = sd->mds.mdd_crypto.scr_key[i]; 965 if (crypto_newsession(&sd->mds.mdd_crypto.scr_sid[i], 966 &cri, 0) != 0) { 967 for (i = 0; 968 sd->mds.mdd_crypto.scr_sid[i] != (u_int64_t)-1; 969 i++) { 970 crypto_freesession( 971 sd->mds.mdd_crypto.scr_sid[i]); 972 sd->mds.mdd_crypto.scr_sid[i] = (u_int64_t)-1; 973 } 974 return (EINVAL); 975 } 976 } 977 978 sr_hotplug_register(sd, sr_crypto_hotplug); 979 980 return (0); 981 } 982 983 void 984 sr_crypto_free_resources(struct sr_discipline *sd) 985 { 986 struct sr_workunit *wu; 987 struct sr_crypto_wu *crwu; 988 u_int i; 989 990 DNPRINTF(SR_D_DIS, "%s: sr_crypto_free_resources\n", 991 DEVNAME(sd->sd_sc)); 992 993 if (sd->mds.mdd_crypto.key_disk != NULL) { 994 explicit_bzero(sd->mds.mdd_crypto.key_disk, 995 sizeof(*sd->mds.mdd_crypto.key_disk)); 996 free(sd->mds.mdd_crypto.key_disk, M_DEVBUF, 997 sizeof(*sd->mds.mdd_crypto.key_disk)); 998 } 999 1000 sr_hotplug_unregister(sd, sr_crypto_hotplug); 1001 1002 for (i = 0; sd->mds.mdd_crypto.scr_sid[i] != (u_int64_t)-1; i++) { 1003 crypto_freesession(sd->mds.mdd_crypto.scr_sid[i]); 1004 sd->mds.mdd_crypto.scr_sid[i] = (u_int64_t)-1; 1005 } 1006 1007 TAILQ_FOREACH(wu, &sd->sd_wu, swu_next) { 1008 crwu = (struct sr_crypto_wu *)wu; 1009 if (crwu->cr_dmabuf) 1010 dma_free(crwu->cr_dmabuf, MAXPHYS); 1011 if (crwu->cr_crp) { 1012 crwu->cr_crp->crp_desc = crwu->cr_descs; 1013 crypto_freereq(crwu->cr_crp); 1014 } 1015 } 1016 1017 sr_wu_free(sd); 1018 sr_ccb_free(sd); 1019 } 1020 1021 int 1022 sr_crypto_ioctl(struct sr_discipline *sd, struct bioc_discipline *bd) 1023 { 1024 struct sr_crypto_kdfpair kdfpair; 1025 struct sr_crypto_kdfinfo kdfinfo1, kdfinfo2; 1026 int size, rv = 1; 1027 1028 DNPRINTF(SR_D_IOCTL, "%s: sr_crypto_ioctl %u\n", 1029 DEVNAME(sd->sd_sc), bd->bd_cmd); 1030 1031 switch (bd->bd_cmd) { 1032 case SR_IOCTL_GET_KDFHINT: 1033 1034 /* Get KDF hint for userland. */ 1035 size = sizeof(sd->mds.mdd_crypto.scr_meta->scm_kdfhint); 1036 if (bd->bd_data == NULL || bd->bd_size > size) 1037 goto bad; 1038 if (copyout(sd->mds.mdd_crypto.scr_meta->scm_kdfhint, 1039 bd->bd_data, bd->bd_size)) 1040 goto bad; 1041 1042 rv = 0; 1043 1044 break; 1045 1046 case SR_IOCTL_CHANGE_PASSPHRASE: 1047 1048 /* Attempt to change passphrase. */ 1049 1050 size = sizeof(kdfpair); 1051 if (bd->bd_data == NULL || bd->bd_size > size) 1052 goto bad; 1053 if (copyin(bd->bd_data, &kdfpair, size)) 1054 goto bad; 1055 1056 size = sizeof(kdfinfo1); 1057 if (kdfpair.kdfinfo1 == NULL || kdfpair.kdfsize1 > size) 1058 goto bad; 1059 if (copyin(kdfpair.kdfinfo1, &kdfinfo1, size)) 1060 goto bad; 1061 1062 size = sizeof(kdfinfo2); 1063 if (kdfpair.kdfinfo2 == NULL || kdfpair.kdfsize2 > size) 1064 goto bad; 1065 if (copyin(kdfpair.kdfinfo2, &kdfinfo2, size)) 1066 goto bad; 1067 1068 if (sr_crypto_change_maskkey(sd, &kdfinfo1, &kdfinfo2)) 1069 goto bad; 1070 1071 /* Save metadata to disk. */ 1072 rv = sr_meta_save(sd, SR_META_DIRTY); 1073 1074 break; 1075 } 1076 1077 bad: 1078 explicit_bzero(&kdfpair, sizeof(kdfpair)); 1079 explicit_bzero(&kdfinfo1, sizeof(kdfinfo1)); 1080 explicit_bzero(&kdfinfo2, sizeof(kdfinfo2)); 1081 1082 return (rv); 1083 } 1084 1085 int 1086 sr_crypto_meta_opt_handler(struct sr_discipline *sd, struct sr_meta_opt_hdr *om) 1087 { 1088 int rv = EINVAL; 1089 1090 if (om->som_type == SR_OPT_CRYPTO) { 1091 sd->mds.mdd_crypto.scr_meta = (struct sr_meta_crypto *)om; 1092 rv = 0; 1093 } 1094 1095 return (rv); 1096 } 1097 1098 int 1099 sr_crypto_rw(struct sr_workunit *wu) 1100 { 1101 struct sr_crypto_wu *crwu; 1102 daddr_t blkno; 1103 int rv = 0; 1104 1105 DNPRINTF(SR_D_DIS, "%s: sr_crypto_rw wu %p\n", 1106 DEVNAME(wu->swu_dis->sd_sc), wu); 1107 1108 if (sr_validate_io(wu, &blkno, "sr_crypto_rw")) 1109 return (1); 1110 1111 if (wu->swu_xs->flags & SCSI_DATA_OUT) { 1112 crwu = sr_crypto_prepare(wu, 1); 1113 crwu->cr_crp->crp_callback = sr_crypto_write; 1114 rv = crypto_invoke(crwu->cr_crp); 1115 if (rv == 0) 1116 rv = crwu->cr_crp->crp_etype; 1117 } else 1118 rv = sr_crypto_dev_rw(wu, NULL); 1119 1120 return (rv); 1121 } 1122 1123 int 1124 sr_crypto_write(struct cryptop *crp) 1125 { 1126 struct sr_crypto_wu *crwu = crp->crp_opaque; 1127 struct sr_workunit *wu = &crwu->cr_wu; 1128 int s; 1129 1130 DNPRINTF(SR_D_INTR, "%s: sr_crypto_write: wu %p xs: %p\n", 1131 DEVNAME(wu->swu_dis->sd_sc), wu, wu->swu_xs); 1132 1133 if (crp->crp_etype) { 1134 /* fail io */ 1135 wu->swu_xs->error = XS_DRIVER_STUFFUP; 1136 s = splbio(); 1137 sr_scsi_done(wu->swu_dis, wu->swu_xs); 1138 splx(s); 1139 } 1140 1141 return (sr_crypto_dev_rw(wu, crwu)); 1142 } 1143 1144 int 1145 sr_crypto_dev_rw(struct sr_workunit *wu, struct sr_crypto_wu *crwu) 1146 { 1147 struct sr_discipline *sd = wu->swu_dis; 1148 struct scsi_xfer *xs = wu->swu_xs; 1149 struct sr_ccb *ccb; 1150 struct uio *uio; 1151 daddr_t blkno; 1152 1153 blkno = wu->swu_blk_start; 1154 1155 ccb = sr_ccb_rw(sd, 0, blkno, xs->datalen, xs->data, xs->flags, 0); 1156 if (!ccb) { 1157 /* should never happen but handle more gracefully */ 1158 printf("%s: %s: too many ccbs queued\n", 1159 DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname); 1160 goto bad; 1161 } 1162 if (!ISSET(xs->flags, SCSI_DATA_IN)) { 1163 uio = crwu->cr_crp->crp_buf; 1164 ccb->ccb_buf.b_data = uio->uio_iov->iov_base; 1165 ccb->ccb_opaque = crwu; 1166 } 1167 sr_wu_enqueue_ccb(wu, ccb); 1168 sr_schedule_wu(wu); 1169 1170 return (0); 1171 1172 bad: 1173 /* wu is unwound by sr_wu_put */ 1174 if (crwu) 1175 crwu->cr_crp->crp_etype = EINVAL; 1176 return (1); 1177 } 1178 1179 void 1180 sr_crypto_done(struct sr_workunit *wu) 1181 { 1182 struct scsi_xfer *xs = wu->swu_xs; 1183 struct sr_crypto_wu *crwu; 1184 int s; 1185 1186 /* If this was a successful read, initiate decryption of the data. */ 1187 if (ISSET(xs->flags, SCSI_DATA_IN) && xs->error == XS_NOERROR) { 1188 crwu = sr_crypto_prepare(wu, 0); 1189 crwu->cr_crp->crp_callback = sr_crypto_read; 1190 DNPRINTF(SR_D_INTR, "%s: sr_crypto_done: crypto_invoke %p\n", 1191 DEVNAME(wu->swu_dis->sd_sc), crwu->cr_crp); 1192 crypto_invoke(crwu->cr_crp); 1193 return; 1194 } 1195 1196 s = splbio(); 1197 sr_scsi_done(wu->swu_dis, wu->swu_xs); 1198 splx(s); 1199 } 1200 1201 int 1202 sr_crypto_read(struct cryptop *crp) 1203 { 1204 struct sr_crypto_wu *crwu = crp->crp_opaque; 1205 struct sr_workunit *wu = &crwu->cr_wu; 1206 int s; 1207 1208 DNPRINTF(SR_D_INTR, "%s: sr_crypto_read: wu %p xs: %p\n", 1209 DEVNAME(wu->swu_dis->sd_sc), wu, wu->swu_xs); 1210 1211 if (crp->crp_etype) 1212 wu->swu_xs->error = XS_DRIVER_STUFFUP; 1213 1214 s = splbio(); 1215 sr_scsi_done(wu->swu_dis, wu->swu_xs); 1216 splx(s); 1217 1218 return (0); 1219 } 1220 1221 void 1222 sr_crypto_hotplug(struct sr_discipline *sd, struct disk *diskp, int action) 1223 { 1224 DNPRINTF(SR_D_MISC, "%s: sr_crypto_hotplug: %s %d\n", 1225 DEVNAME(sd->sd_sc), diskp->dk_name, action); 1226 } 1227 1228 #ifdef SR_DEBUG0 1229 void 1230 sr_crypto_dumpkeys(struct sr_discipline *sd) 1231 { 1232 int i, j; 1233 1234 printf("sr_crypto_dumpkeys:\n"); 1235 for (i = 0; i < SR_CRYPTO_MAXKEYS; i++) { 1236 printf("\tscm_key[%d]: 0x", i); 1237 for (j = 0; j < SR_CRYPTO_KEYBYTES; j++) { 1238 printf("%02x", 1239 sd->mds.mdd_crypto.scr_meta->scm_key[i][j]); 1240 } 1241 printf("\n"); 1242 } 1243 printf("sr_crypto_dumpkeys: runtime data keys:\n"); 1244 for (i = 0; i < SR_CRYPTO_MAXKEYS; i++) { 1245 printf("\tscr_key[%d]: 0x", i); 1246 for (j = 0; j < SR_CRYPTO_KEYBYTES; j++) { 1247 printf("%02x", 1248 sd->mds.mdd_crypto.scr_key[i][j]); 1249 } 1250 printf("\n"); 1251 } 1252 } 1253 #endif /* SR_DEBUG */ 1254