g_eli.h revision 226840
1/*- 2 * Copyright (c) 2005-2011 Pawel Jakub Dawidek <pawel@dawidek.net> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/geom/eli/g_eli.h 226840 2011-10-27 16:12:25Z pjd $ 27 */ 28 29#ifndef _G_ELI_H_ 30#define _G_ELI_H_ 31 32#include <sys/endian.h> 33#include <sys/errno.h> 34#include <sys/malloc.h> 35#include <crypto/sha2/sha2.h> 36#include <opencrypto/cryptodev.h> 37#ifdef _KERNEL 38#include <sys/bio.h> 39#include <sys/libkern.h> 40#include <sys/lock.h> 41#include <sys/mutex.h> 42#include <sys/queue.h> 43#include <sys/tree.h> 44#include <geom/geom.h> 45#else 46#include <assert.h> 47#include <stdio.h> 48#include <string.h> 49#include <strings.h> 50#endif 51#ifndef _OpenSSL_ 52#include <sys/md5.h> 53#endif 54 55#define G_ELI_CLASS_NAME "ELI" 56#define G_ELI_MAGIC "GEOM::ELI" 57#define G_ELI_SUFFIX ".eli" 58 59/* 60 * Version history: 61 * 0 - Initial version number. 62 * 1 - Added data authentication support (md_aalgo field and 63 * G_ELI_FLAG_AUTH flag). 64 * 2 - Added G_ELI_FLAG_READONLY. 65 * 3 - Added 'configure' subcommand. 66 * 4 - IV is generated from offset converted to little-endian 67 * (the G_ELI_FLAG_NATIVE_BYTE_ORDER flag will be set for older versions). 68 * 5 - Added multiple encrypton keys and AES-XTS support. 69 * 6 - Fixed usage of multiple keys for authenticated providers (the 70 * G_ELI_FLAG_FIRST_KEY flag will be set for older versions). 71 */ 72#define G_ELI_VERSION_00 0 73#define G_ELI_VERSION_01 1 74#define G_ELI_VERSION_02 2 75#define G_ELI_VERSION_03 3 76#define G_ELI_VERSION_04 4 77#define G_ELI_VERSION_05 5 78#define G_ELI_VERSION_06 6 79#define G_ELI_VERSION G_ELI_VERSION_06 80 81/* ON DISK FLAGS. */ 82/* Use random, onetime keys. */ 83#define G_ELI_FLAG_ONETIME 0x00000001 84/* Ask for the passphrase from the kernel, before mounting root. */ 85#define G_ELI_FLAG_BOOT 0x00000002 86/* Detach on last close, if we were open for writing. */ 87#define G_ELI_FLAG_WO_DETACH 0x00000004 88/* Detach on last close. */ 89#define G_ELI_FLAG_RW_DETACH 0x00000008 90/* Provide data authentication. */ 91#define G_ELI_FLAG_AUTH 0x00000010 92/* Provider is read-only, we should deny all write attempts. */ 93#define G_ELI_FLAG_RO 0x00000020 94/* RUNTIME FLAGS. */ 95/* Provider was open for writing. */ 96#define G_ELI_FLAG_WOPEN 0x00010000 97/* Destroy device. */ 98#define G_ELI_FLAG_DESTROY 0x00020000 99/* Provider uses native byte-order for IV generation. */ 100#define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 101/* Provider uses single encryption key. */ 102#define G_ELI_FLAG_SINGLE_KEY 0x00080000 103/* Device suspended. */ 104#define G_ELI_FLAG_SUSPEND 0x00100000 105/* Provider uses first encryption key. */ 106#define G_ELI_FLAG_FIRST_KEY 0x00200000 107 108#define G_ELI_NEW_BIO 255 109 110#define SHA512_MDLEN 64 111#define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 112 113#define G_ELI_MAXMKEYS 2 114#define G_ELI_MAXKEYLEN 64 115#define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 116#define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 117#define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 118#define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 119#define G_ELI_SALTLEN 64 120#define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 121/* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 122#define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 123#define G_ELI_OVERWRITES 5 124/* Switch data encryption key every 2^20 blocks. */ 125#define G_ELI_KEY_SHIFT 20 126 127#ifdef _KERNEL 128extern int g_eli_debug; 129extern u_int g_eli_overwrites; 130extern u_int g_eli_batch; 131 132#define G_ELI_CRYPTO_UNKNOWN 0 133#define G_ELI_CRYPTO_HW 1 134#define G_ELI_CRYPTO_SW 2 135 136#define G_ELI_DEBUG(lvl, ...) do { \ 137 if (g_eli_debug >= (lvl)) { \ 138 printf("GEOM_ELI"); \ 139 if (g_eli_debug > 0) \ 140 printf("[%u]", lvl); \ 141 printf(": "); \ 142 printf(__VA_ARGS__); \ 143 printf("\n"); \ 144 } \ 145} while (0) 146#define G_ELI_LOGREQ(lvl, bp, ...) do { \ 147 if (g_eli_debug >= (lvl)) { \ 148 printf("GEOM_ELI"); \ 149 if (g_eli_debug > 0) \ 150 printf("[%u]", lvl); \ 151 printf(": "); \ 152 printf(__VA_ARGS__); \ 153 printf(" "); \ 154 g_print_bio(bp); \ 155 printf("\n"); \ 156 } \ 157} while (0) 158 159struct g_eli_worker { 160 struct g_eli_softc *w_softc; 161 struct proc *w_proc; 162 u_int w_number; 163 uint64_t w_sid; 164 boolean_t w_active; 165 LIST_ENTRY(g_eli_worker) w_next; 166}; 167 168struct g_eli_softc { 169 struct g_geom *sc_geom; 170 u_int sc_version; 171 u_int sc_crypto; 172 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 173 uint8_t sc_ekey[G_ELI_DATAKEYLEN]; 174 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue; 175 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree; 176 struct mtx sc_ekeys_lock; 177 uint64_t sc_ekeys_total; 178 uint64_t sc_ekeys_allocated; 179 u_int sc_ealgo; 180 u_int sc_ekeylen; 181 uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 182 u_int sc_aalgo; 183 u_int sc_akeylen; 184 u_int sc_alen; 185 SHA256_CTX sc_akeyctx; 186 uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 187 SHA256_CTX sc_ivctx; 188 int sc_nkey; 189 uint32_t sc_flags; 190 int sc_inflight; 191 off_t sc_mediasize; 192 size_t sc_sectorsize; 193 u_int sc_bytes_per_sector; 194 u_int sc_data_per_sector; 195 boolean_t sc_cpubind; 196 197 /* Only for software cryptography. */ 198 struct bio_queue_head sc_queue; 199 struct mtx sc_queue_mtx; 200 LIST_HEAD(, g_eli_worker) sc_workers; 201}; 202#define sc_name sc_geom->name 203#endif /* _KERNEL */ 204 205struct g_eli_metadata { 206 char md_magic[16]; /* Magic value. */ 207 uint32_t md_version; /* Version number. */ 208 uint32_t md_flags; /* Additional flags. */ 209 uint16_t md_ealgo; /* Encryption algorithm. */ 210 uint16_t md_keylen; /* Key length. */ 211 uint16_t md_aalgo; /* Authentication algorithm. */ 212 uint64_t md_provsize; /* Provider's size. */ 213 uint32_t md_sectorsize; /* Sector size. */ 214 uint8_t md_keys; /* Available keys. */ 215 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 216 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 217 /* Encrypted master key (IV-key, Data-key, HMAC). */ 218 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 219 u_char md_hash[16]; /* MD5 hash. */ 220} __packed; 221#ifndef _OpenSSL_ 222static __inline void 223eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap) 224{ 225 u_char *p; 226 227 p = *datap; 228 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 229 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 230 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 231 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 232 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 233 *p = md->md_keys; p += sizeof(md->md_keys); 234 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 235 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 236 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 237 *datap = p; 238} 239static __inline void 240eli_metadata_encode_v1v2v3v4v5v6(struct g_eli_metadata *md, u_char **datap) 241{ 242 u_char *p; 243 244 p = *datap; 245 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 246 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 247 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 248 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 249 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 250 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 251 *p = md->md_keys; p += sizeof(md->md_keys); 252 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 253 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 254 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 255 *datap = p; 256} 257static __inline void 258eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 259{ 260 MD5_CTX ctx; 261 u_char *p; 262 263 p = data; 264 bcopy(md->md_magic, p, sizeof(md->md_magic)); 265 p += sizeof(md->md_magic); 266 le32enc(p, md->md_version); 267 p += sizeof(md->md_version); 268 switch (md->md_version) { 269 case G_ELI_VERSION_00: 270 eli_metadata_encode_v0(md, &p); 271 break; 272 case G_ELI_VERSION_01: 273 case G_ELI_VERSION_02: 274 case G_ELI_VERSION_03: 275 case G_ELI_VERSION_04: 276 case G_ELI_VERSION_05: 277 case G_ELI_VERSION_06: 278 eli_metadata_encode_v1v2v3v4v5v6(md, &p); 279 break; 280 default: 281#ifdef _KERNEL 282 panic("%s: Unsupported version %u.", __func__, 283 (u_int)md->md_version); 284#else 285 assert(!"Unsupported metadata version."); 286#endif 287 } 288 MD5Init(&ctx); 289 MD5Update(&ctx, data, p - data); 290 MD5Final(md->md_hash, &ctx); 291 bcopy(md->md_hash, p, sizeof(md->md_hash)); 292} 293static __inline int 294eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 295{ 296 MD5_CTX ctx; 297 const u_char *p; 298 299 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 300 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 301 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 302 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 303 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 304 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 305 md->md_keys = *p; p += sizeof(md->md_keys); 306 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 307 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 308 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 309 MD5Init(&ctx); 310 MD5Update(&ctx, data, p - data); 311 MD5Final(md->md_hash, &ctx); 312 if (bcmp(md->md_hash, p, 16) != 0) 313 return (EINVAL); 314 return (0); 315} 316 317static __inline int 318eli_metadata_decode_v1v2v3v4v5v6(const u_char *data, struct g_eli_metadata *md) 319{ 320 MD5_CTX ctx; 321 const u_char *p; 322 323 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 324 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 325 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 326 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 327 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 328 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 329 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 330 md->md_keys = *p; p += sizeof(md->md_keys); 331 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 332 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 333 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 334 MD5Init(&ctx); 335 MD5Update(&ctx, data, p - data); 336 MD5Final(md->md_hash, &ctx); 337 if (bcmp(md->md_hash, p, 16) != 0) 338 return (EINVAL); 339 return (0); 340} 341static __inline int 342eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 343{ 344 int error; 345 346 bcopy(data, md->md_magic, sizeof(md->md_magic)); 347 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0) 348 return (EINVAL); 349 md->md_version = le32dec(data + sizeof(md->md_magic)); 350 switch (md->md_version) { 351 case G_ELI_VERSION_00: 352 error = eli_metadata_decode_v0(data, md); 353 break; 354 case G_ELI_VERSION_01: 355 case G_ELI_VERSION_02: 356 case G_ELI_VERSION_03: 357 case G_ELI_VERSION_04: 358 case G_ELI_VERSION_05: 359 case G_ELI_VERSION_06: 360 error = eli_metadata_decode_v1v2v3v4v5v6(data, md); 361 break; 362 default: 363 error = EOPNOTSUPP; 364 break; 365 } 366 return (error); 367} 368#endif /* !_OpenSSL */ 369 370static __inline u_int 371g_eli_str2ealgo(const char *name) 372{ 373 374 if (strcasecmp("null", name) == 0) 375 return (CRYPTO_NULL_CBC); 376 else if (strcasecmp("null-cbc", name) == 0) 377 return (CRYPTO_NULL_CBC); 378 else if (strcasecmp("aes", name) == 0) 379 return (CRYPTO_AES_XTS); 380 else if (strcasecmp("aes-cbc", name) == 0) 381 return (CRYPTO_AES_CBC); 382 else if (strcasecmp("aes-xts", name) == 0) 383 return (CRYPTO_AES_XTS); 384 else if (strcasecmp("blowfish", name) == 0) 385 return (CRYPTO_BLF_CBC); 386 else if (strcasecmp("blowfish-cbc", name) == 0) 387 return (CRYPTO_BLF_CBC); 388 else if (strcasecmp("camellia", name) == 0) 389 return (CRYPTO_CAMELLIA_CBC); 390 else if (strcasecmp("camellia-cbc", name) == 0) 391 return (CRYPTO_CAMELLIA_CBC); 392 else if (strcasecmp("3des", name) == 0) 393 return (CRYPTO_3DES_CBC); 394 else if (strcasecmp("3des-cbc", name) == 0) 395 return (CRYPTO_3DES_CBC); 396 return (CRYPTO_ALGORITHM_MIN - 1); 397} 398 399static __inline u_int 400g_eli_str2aalgo(const char *name) 401{ 402 403 if (strcasecmp("hmac/md5", name) == 0) 404 return (CRYPTO_MD5_HMAC); 405 else if (strcasecmp("hmac/sha1", name) == 0) 406 return (CRYPTO_SHA1_HMAC); 407 else if (strcasecmp("hmac/ripemd160", name) == 0) 408 return (CRYPTO_RIPEMD160_HMAC); 409 else if (strcasecmp("hmac/sha256", name) == 0) 410 return (CRYPTO_SHA2_256_HMAC); 411 else if (strcasecmp("hmac/sha384", name) == 0) 412 return (CRYPTO_SHA2_384_HMAC); 413 else if (strcasecmp("hmac/sha512", name) == 0) 414 return (CRYPTO_SHA2_512_HMAC); 415 return (CRYPTO_ALGORITHM_MIN - 1); 416} 417 418static __inline const char * 419g_eli_algo2str(u_int algo) 420{ 421 422 switch (algo) { 423 case CRYPTO_NULL_CBC: 424 return ("NULL"); 425 case CRYPTO_AES_CBC: 426 return ("AES-CBC"); 427 case CRYPTO_AES_XTS: 428 return ("AES-XTS"); 429 case CRYPTO_BLF_CBC: 430 return ("Blowfish-CBC"); 431 case CRYPTO_CAMELLIA_CBC: 432 return ("CAMELLIA-CBC"); 433 case CRYPTO_3DES_CBC: 434 return ("3DES-CBC"); 435 case CRYPTO_MD5_HMAC: 436 return ("HMAC/MD5"); 437 case CRYPTO_SHA1_HMAC: 438 return ("HMAC/SHA1"); 439 case CRYPTO_RIPEMD160_HMAC: 440 return ("HMAC/RIPEMD160"); 441 case CRYPTO_SHA2_256_HMAC: 442 return ("HMAC/SHA256"); 443 case CRYPTO_SHA2_384_HMAC: 444 return ("HMAC/SHA384"); 445 case CRYPTO_SHA2_512_HMAC: 446 return ("HMAC/SHA512"); 447 } 448 return ("unknown"); 449} 450 451static __inline void 452eli_metadata_dump(const struct g_eli_metadata *md) 453{ 454 static const char hex[] = "0123456789abcdef"; 455 char str[sizeof(md->md_mkeys) * 2 + 1]; 456 u_int i; 457 458 printf(" magic: %s\n", md->md_magic); 459 printf(" version: %u\n", (u_int)md->md_version); 460 printf(" flags: 0x%x\n", (u_int)md->md_flags); 461 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 462 printf(" keylen: %u\n", (u_int)md->md_keylen); 463 if (md->md_flags & G_ELI_FLAG_AUTH) 464 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 465 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 466 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 467 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 468 printf("iterations: %u\n", (u_int)md->md_iterations); 469 bzero(str, sizeof(str)); 470 for (i = 0; i < sizeof(md->md_salt); i++) { 471 str[i * 2] = hex[md->md_salt[i] >> 4]; 472 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 473 } 474 printf(" Salt: %s\n", str); 475 bzero(str, sizeof(str)); 476 for (i = 0; i < sizeof(md->md_mkeys); i++) { 477 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 478 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 479 } 480 printf("Master Key: %s\n", str); 481 bzero(str, sizeof(str)); 482 for (i = 0; i < 16; i++) { 483 str[i * 2] = hex[md->md_hash[i] >> 4]; 484 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 485 } 486 printf(" MD5 hash: %s\n", str); 487} 488 489static __inline u_int 490g_eli_keylen(u_int algo, u_int keylen) 491{ 492 493 switch (algo) { 494 case CRYPTO_NULL_CBC: 495 if (keylen == 0) 496 keylen = 64 * 8; 497 else { 498 if (keylen > 64 * 8) 499 keylen = 0; 500 } 501 return (keylen); 502 case CRYPTO_AES_CBC: 503 case CRYPTO_CAMELLIA_CBC: 504 switch (keylen) { 505 case 0: 506 return (128); 507 case 128: 508 case 192: 509 case 256: 510 return (keylen); 511 default: 512 return (0); 513 } 514 case CRYPTO_AES_XTS: 515 switch (keylen) { 516 case 0: 517 return (128); 518 case 128: 519 case 256: 520 return (keylen); 521 default: 522 return (0); 523 } 524 case CRYPTO_BLF_CBC: 525 if (keylen == 0) 526 return (128); 527 if (keylen < 128 || keylen > 448) 528 return (0); 529 if ((keylen % 32) != 0) 530 return (0); 531 return (keylen); 532 case CRYPTO_3DES_CBC: 533 if (keylen == 0 || keylen == 192) 534 return (192); 535 return (0); 536 default: 537 return (0); 538 } 539} 540 541static __inline u_int 542g_eli_hashlen(u_int algo) 543{ 544 545 switch (algo) { 546 case CRYPTO_MD5_HMAC: 547 return (16); 548 case CRYPTO_SHA1_HMAC: 549 return (20); 550 case CRYPTO_RIPEMD160_HMAC: 551 return (20); 552 case CRYPTO_SHA2_256_HMAC: 553 return (32); 554 case CRYPTO_SHA2_384_HMAC: 555 return (48); 556 case CRYPTO_SHA2_512_HMAC: 557 return (64); 558 } 559 return (0); 560} 561 562#ifdef _KERNEL 563int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 564 struct g_eli_metadata *md); 565struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 566 struct g_provider *bpp, const struct g_eli_metadata *md, 567 const u_char *mkey, int nkey); 568int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 569 570int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 571void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 572 573void g_eli_read_done(struct bio *bp); 574void g_eli_write_done(struct bio *bp); 575int g_eli_crypto_rerun(struct cryptop *crp); 576void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 577 size_t size); 578 579void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker); 580void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 581 582void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 583void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 584#endif 585 586void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 587int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 588 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 589int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 590 unsigned char *mkey); 591#ifdef _KERNEL 592void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 593#endif 594 595int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 596 const u_char *key, size_t keysize); 597int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 598 const u_char *key, size_t keysize); 599 600struct hmac_ctx { 601 SHA512_CTX shactx; 602 u_char k_opad[128]; 603}; 604 605void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 606 size_t hkeylen); 607void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 608 size_t datasize); 609void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 610void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 611 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 612 613#ifdef _KERNEL 614void g_eli_key_init(struct g_eli_softc *sc); 615void g_eli_key_destroy(struct g_eli_softc *sc); 616uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize); 617void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey); 618#endif 619#endif /* !_G_ELI_H_ */ 620