g_eli.h revision 314327
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: stable/10/sys/geom/eli/g_eli.h 314327 2017-02-27 08:27:38Z avg $ 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/sha256.h> 36#include <crypto/sha2/sha512.h> 37#include <opencrypto/cryptodev.h> 38#ifdef _KERNEL 39#include <sys/bio.h> 40#include <sys/libkern.h> 41#include <sys/lock.h> 42#include <sys/mutex.h> 43#include <sys/queue.h> 44#include <sys/tree.h> 45#include <geom/geom.h> 46#else 47#include <assert.h> 48#include <stdio.h> 49#include <string.h> 50#include <strings.h> 51#endif 52#ifndef _OpenSSL_ 53#include <sys/md5.h> 54#endif 55 56#define G_ELI_CLASS_NAME "ELI" 57#define G_ELI_MAGIC "GEOM::ELI" 58#define G_ELI_SUFFIX ".eli" 59 60/* 61 * Version history: 62 * 0 - Initial version number. 63 * 1 - Added data authentication support (md_aalgo field and 64 * G_ELI_FLAG_AUTH flag). 65 * 2 - Added G_ELI_FLAG_READONLY. 66 * 3 - Added 'configure' subcommand. 67 * 4 - IV is generated from offset converted to little-endian 68 * (the G_ELI_FLAG_NATIVE_BYTE_ORDER flag will be set for older versions). 69 * 5 - Added multiple encrypton keys and AES-XTS support. 70 * 6 - Fixed usage of multiple keys for authenticated providers (the 71 * G_ELI_FLAG_FIRST_KEY flag will be set for older versions). 72 * 7 - Encryption keys are now generated from the Data Key and not from the 73 * IV Key (the G_ELI_FLAG_ENC_IVKEY flag will be set for older versions). 74 */ 75#define G_ELI_VERSION_00 0 76#define G_ELI_VERSION_01 1 77#define G_ELI_VERSION_02 2 78#define G_ELI_VERSION_03 3 79#define G_ELI_VERSION_04 4 80#define G_ELI_VERSION_05 5 81#define G_ELI_VERSION_06 6 82#define G_ELI_VERSION_07 7 83#define G_ELI_VERSION G_ELI_VERSION_07 84 85/* ON DISK FLAGS. */ 86/* Use random, onetime keys. */ 87#define G_ELI_FLAG_ONETIME 0x00000001 88/* Ask for the passphrase from the kernel, before mounting root. */ 89#define G_ELI_FLAG_BOOT 0x00000002 90/* Detach on last close, if we were open for writing. */ 91#define G_ELI_FLAG_WO_DETACH 0x00000004 92/* Detach on last close. */ 93#define G_ELI_FLAG_RW_DETACH 0x00000008 94/* Provide data authentication. */ 95#define G_ELI_FLAG_AUTH 0x00000010 96/* Provider is read-only, we should deny all write attempts. */ 97#define G_ELI_FLAG_RO 0x00000020 98/* RUNTIME FLAGS. */ 99/* Provider was open for writing. */ 100#define G_ELI_FLAG_WOPEN 0x00010000 101/* Destroy device. */ 102#define G_ELI_FLAG_DESTROY 0x00020000 103/* Provider uses native byte-order for IV generation. */ 104#define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 105/* Provider uses single encryption key. */ 106#define G_ELI_FLAG_SINGLE_KEY 0x00080000 107/* Device suspended. */ 108#define G_ELI_FLAG_SUSPEND 0x00100000 109/* Provider uses first encryption key. */ 110#define G_ELI_FLAG_FIRST_KEY 0x00200000 111/* Provider uses IV-Key for encryption key generation. */ 112#define G_ELI_FLAG_ENC_IVKEY 0x00400000 113 114#define G_ELI_NEW_BIO 255 115 116#define SHA512_MDLEN 64 117#define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 118 119#define G_ELI_MAXMKEYS 2 120#define G_ELI_MAXKEYLEN 64 121#define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 122#define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 123#define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 124#define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 125#define G_ELI_SALTLEN 64 126#define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 127/* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 128#define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 129#define G_ELI_OVERWRITES 5 130/* Switch data encryption key every 2^20 blocks. */ 131#define G_ELI_KEY_SHIFT 20 132 133#ifdef _KERNEL 134extern int g_eli_debug; 135extern u_int g_eli_overwrites; 136extern u_int g_eli_batch; 137 138#define G_ELI_CRYPTO_UNKNOWN 0 139#define G_ELI_CRYPTO_HW 1 140#define G_ELI_CRYPTO_SW 2 141 142#define G_ELI_DEBUG(lvl, ...) do { \ 143 if (g_eli_debug >= (lvl)) { \ 144 printf("GEOM_ELI"); \ 145 if (g_eli_debug > 0) \ 146 printf("[%u]", lvl); \ 147 printf(": "); \ 148 printf(__VA_ARGS__); \ 149 printf("\n"); \ 150 } \ 151} while (0) 152#define G_ELI_LOGREQ(lvl, bp, ...) do { \ 153 if (g_eli_debug >= (lvl)) { \ 154 printf("GEOM_ELI"); \ 155 if (g_eli_debug > 0) \ 156 printf("[%u]", lvl); \ 157 printf(": "); \ 158 printf(__VA_ARGS__); \ 159 printf(" "); \ 160 g_print_bio(bp); \ 161 printf("\n"); \ 162 } \ 163} while (0) 164 165struct g_eli_worker { 166 struct g_eli_softc *w_softc; 167 struct proc *w_proc; 168 u_int w_number; 169 uint64_t w_sid; 170 boolean_t w_active; 171 LIST_ENTRY(g_eli_worker) w_next; 172}; 173 174struct g_eli_softc { 175 struct g_geom *sc_geom; 176 u_int sc_version; 177 u_int sc_crypto; 178 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 179 uint8_t sc_ekey[G_ELI_DATAKEYLEN]; 180 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue; 181 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree; 182 struct mtx sc_ekeys_lock; 183 uint64_t sc_ekeys_total; 184 uint64_t sc_ekeys_allocated; 185 u_int sc_ealgo; 186 u_int sc_ekeylen; 187 uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 188 u_int sc_aalgo; 189 u_int sc_akeylen; 190 u_int sc_alen; 191 SHA256_CTX sc_akeyctx; 192 uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 193 SHA256_CTX sc_ivctx; 194 int sc_nkey; 195 uint32_t sc_flags; 196 int sc_inflight; 197 off_t sc_mediasize; 198 size_t sc_sectorsize; 199 u_int sc_bytes_per_sector; 200 u_int sc_data_per_sector; 201 boolean_t sc_cpubind; 202 203 /* Only for software cryptography. */ 204 struct bio_queue_head sc_queue; 205 struct mtx sc_queue_mtx; 206 LIST_HEAD(, g_eli_worker) sc_workers; 207}; 208#define sc_name sc_geom->name 209#endif /* _KERNEL */ 210 211struct g_eli_metadata { 212 char md_magic[16]; /* Magic value. */ 213 uint32_t md_version; /* Version number. */ 214 uint32_t md_flags; /* Additional flags. */ 215 uint16_t md_ealgo; /* Encryption algorithm. */ 216 uint16_t md_keylen; /* Key length. */ 217 uint16_t md_aalgo; /* Authentication algorithm. */ 218 uint64_t md_provsize; /* Provider's size. */ 219 uint32_t md_sectorsize; /* Sector size. */ 220 uint8_t md_keys; /* Available keys. */ 221 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 222 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 223 /* Encrypted master key (IV-key, Data-key, HMAC). */ 224 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 225 u_char md_hash[16]; /* MD5 hash. */ 226} __packed; 227#ifndef _OpenSSL_ 228static __inline void 229eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap) 230{ 231 u_char *p; 232 233 p = *datap; 234 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 235 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 236 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 237 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 238 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 239 *p = md->md_keys; p += sizeof(md->md_keys); 240 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 241 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 242 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 243 *datap = p; 244} 245static __inline void 246eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata *md, u_char **datap) 247{ 248 u_char *p; 249 250 p = *datap; 251 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 252 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 253 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 254 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 255 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 256 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 257 *p = md->md_keys; p += sizeof(md->md_keys); 258 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 259 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 260 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 261 *datap = p; 262} 263static __inline void 264eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 265{ 266 MD5_CTX ctx; 267 u_char *p; 268 269 p = data; 270 bcopy(md->md_magic, p, sizeof(md->md_magic)); 271 p += sizeof(md->md_magic); 272 le32enc(p, md->md_version); 273 p += sizeof(md->md_version); 274 switch (md->md_version) { 275 case G_ELI_VERSION_00: 276 eli_metadata_encode_v0(md, &p); 277 break; 278 case G_ELI_VERSION_01: 279 case G_ELI_VERSION_02: 280 case G_ELI_VERSION_03: 281 case G_ELI_VERSION_04: 282 case G_ELI_VERSION_05: 283 case G_ELI_VERSION_06: 284 case G_ELI_VERSION_07: 285 eli_metadata_encode_v1v2v3v4v5v6v7(md, &p); 286 break; 287 default: 288#ifdef _KERNEL 289 panic("%s: Unsupported version %u.", __func__, 290 (u_int)md->md_version); 291#else 292 assert(!"Unsupported metadata version."); 293#endif 294 } 295 MD5Init(&ctx); 296 MD5Update(&ctx, data, p - data); 297 MD5Final(md->md_hash, &ctx); 298 bcopy(md->md_hash, p, sizeof(md->md_hash)); 299} 300static __inline int 301eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 302{ 303 MD5_CTX ctx; 304 const u_char *p; 305 306 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 307 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 308 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 309 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 310 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 311 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 312 md->md_keys = *p; p += sizeof(md->md_keys); 313 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 314 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 315 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 316 MD5Init(&ctx); 317 MD5Update(&ctx, data, p - data); 318 MD5Final(md->md_hash, &ctx); 319 if (bcmp(md->md_hash, p, 16) != 0) 320 return (EINVAL); 321 return (0); 322} 323 324static __inline int 325eli_metadata_decode_v1v2v3v4v5v6v7(const u_char *data, struct g_eli_metadata *md) 326{ 327 MD5_CTX ctx; 328 const u_char *p; 329 330 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 331 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 332 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 333 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 334 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 335 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 336 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 337 md->md_keys = *p; p += sizeof(md->md_keys); 338 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 339 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 340 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 341 MD5Init(&ctx); 342 MD5Update(&ctx, data, p - data); 343 MD5Final(md->md_hash, &ctx); 344 if (bcmp(md->md_hash, p, 16) != 0) 345 return (EINVAL); 346 return (0); 347} 348static __inline int 349eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 350{ 351 int error; 352 353 bcopy(data, md->md_magic, sizeof(md->md_magic)); 354 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0) 355 return (EINVAL); 356 md->md_version = le32dec(data + sizeof(md->md_magic)); 357 switch (md->md_version) { 358 case G_ELI_VERSION_00: 359 error = eli_metadata_decode_v0(data, md); 360 break; 361 case G_ELI_VERSION_01: 362 case G_ELI_VERSION_02: 363 case G_ELI_VERSION_03: 364 case G_ELI_VERSION_04: 365 case G_ELI_VERSION_05: 366 case G_ELI_VERSION_06: 367 case G_ELI_VERSION_07: 368 error = eli_metadata_decode_v1v2v3v4v5v6v7(data, md); 369 break; 370 default: 371 error = EOPNOTSUPP; 372 break; 373 } 374 return (error); 375} 376#endif /* !_OpenSSL */ 377 378static __inline u_int 379g_eli_str2ealgo(const char *name) 380{ 381 382 if (strcasecmp("null", name) == 0) 383 return (CRYPTO_NULL_CBC); 384 else if (strcasecmp("null-cbc", name) == 0) 385 return (CRYPTO_NULL_CBC); 386 else if (strcasecmp("aes", name) == 0) 387 return (CRYPTO_AES_XTS); 388 else if (strcasecmp("aes-cbc", name) == 0) 389 return (CRYPTO_AES_CBC); 390 else if (strcasecmp("aes-xts", name) == 0) 391 return (CRYPTO_AES_XTS); 392 else if (strcasecmp("blowfish", name) == 0) 393 return (CRYPTO_BLF_CBC); 394 else if (strcasecmp("blowfish-cbc", name) == 0) 395 return (CRYPTO_BLF_CBC); 396 else if (strcasecmp("camellia", name) == 0) 397 return (CRYPTO_CAMELLIA_CBC); 398 else if (strcasecmp("camellia-cbc", name) == 0) 399 return (CRYPTO_CAMELLIA_CBC); 400 else if (strcasecmp("3des", name) == 0) 401 return (CRYPTO_3DES_CBC); 402 else if (strcasecmp("3des-cbc", name) == 0) 403 return (CRYPTO_3DES_CBC); 404 return (CRYPTO_ALGORITHM_MIN - 1); 405} 406 407static __inline u_int 408g_eli_str2aalgo(const char *name) 409{ 410 411 if (strcasecmp("hmac/md5", name) == 0) 412 return (CRYPTO_MD5_HMAC); 413 else if (strcasecmp("hmac/sha1", name) == 0) 414 return (CRYPTO_SHA1_HMAC); 415 else if (strcasecmp("hmac/ripemd160", name) == 0) 416 return (CRYPTO_RIPEMD160_HMAC); 417 else if (strcasecmp("hmac/sha256", name) == 0) 418 return (CRYPTO_SHA2_256_HMAC); 419 else if (strcasecmp("hmac/sha384", name) == 0) 420 return (CRYPTO_SHA2_384_HMAC); 421 else if (strcasecmp("hmac/sha512", name) == 0) 422 return (CRYPTO_SHA2_512_HMAC); 423 return (CRYPTO_ALGORITHM_MIN - 1); 424} 425 426static __inline const char * 427g_eli_algo2str(u_int algo) 428{ 429 430 switch (algo) { 431 case CRYPTO_NULL_CBC: 432 return ("NULL"); 433 case CRYPTO_AES_CBC: 434 return ("AES-CBC"); 435 case CRYPTO_AES_XTS: 436 return ("AES-XTS"); 437 case CRYPTO_BLF_CBC: 438 return ("Blowfish-CBC"); 439 case CRYPTO_CAMELLIA_CBC: 440 return ("CAMELLIA-CBC"); 441 case CRYPTO_3DES_CBC: 442 return ("3DES-CBC"); 443 case CRYPTO_MD5_HMAC: 444 return ("HMAC/MD5"); 445 case CRYPTO_SHA1_HMAC: 446 return ("HMAC/SHA1"); 447 case CRYPTO_RIPEMD160_HMAC: 448 return ("HMAC/RIPEMD160"); 449 case CRYPTO_SHA2_256_HMAC: 450 return ("HMAC/SHA256"); 451 case CRYPTO_SHA2_384_HMAC: 452 return ("HMAC/SHA384"); 453 case CRYPTO_SHA2_512_HMAC: 454 return ("HMAC/SHA512"); 455 } 456 return ("unknown"); 457} 458 459static __inline void 460eli_metadata_dump(const struct g_eli_metadata *md) 461{ 462 static const char hex[] = "0123456789abcdef"; 463 char str[sizeof(md->md_mkeys) * 2 + 1]; 464 u_int i; 465 466 printf(" magic: %s\n", md->md_magic); 467 printf(" version: %u\n", (u_int)md->md_version); 468 printf(" flags: 0x%x\n", (u_int)md->md_flags); 469 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 470 printf(" keylen: %u\n", (u_int)md->md_keylen); 471 if (md->md_flags & G_ELI_FLAG_AUTH) 472 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 473 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 474 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 475 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 476 printf("iterations: %u\n", (u_int)md->md_iterations); 477 bzero(str, sizeof(str)); 478 for (i = 0; i < sizeof(md->md_salt); i++) { 479 str[i * 2] = hex[md->md_salt[i] >> 4]; 480 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 481 } 482 printf(" Salt: %s\n", str); 483 bzero(str, sizeof(str)); 484 for (i = 0; i < sizeof(md->md_mkeys); i++) { 485 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 486 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 487 } 488 printf("Master Key: %s\n", str); 489 bzero(str, sizeof(str)); 490 for (i = 0; i < 16; i++) { 491 str[i * 2] = hex[md->md_hash[i] >> 4]; 492 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 493 } 494 printf(" MD5 hash: %s\n", str); 495} 496 497static __inline u_int 498g_eli_keylen(u_int algo, u_int keylen) 499{ 500 501 switch (algo) { 502 case CRYPTO_NULL_CBC: 503 if (keylen == 0) 504 keylen = 64 * 8; 505 else { 506 if (keylen > 64 * 8) 507 keylen = 0; 508 } 509 return (keylen); 510 case CRYPTO_AES_CBC: 511 case CRYPTO_CAMELLIA_CBC: 512 switch (keylen) { 513 case 0: 514 return (128); 515 case 128: 516 case 192: 517 case 256: 518 return (keylen); 519 default: 520 return (0); 521 } 522 case CRYPTO_AES_XTS: 523 switch (keylen) { 524 case 0: 525 return (128); 526 case 128: 527 case 256: 528 return (keylen); 529 default: 530 return (0); 531 } 532 case CRYPTO_BLF_CBC: 533 if (keylen == 0) 534 return (128); 535 if (keylen < 128 || keylen > 448) 536 return (0); 537 if ((keylen % 32) != 0) 538 return (0); 539 return (keylen); 540 case CRYPTO_3DES_CBC: 541 if (keylen == 0 || keylen == 192) 542 return (192); 543 return (0); 544 default: 545 return (0); 546 } 547} 548 549static __inline u_int 550g_eli_hashlen(u_int algo) 551{ 552 553 switch (algo) { 554 case CRYPTO_MD5_HMAC: 555 return (16); 556 case CRYPTO_SHA1_HMAC: 557 return (20); 558 case CRYPTO_RIPEMD160_HMAC: 559 return (20); 560 case CRYPTO_SHA2_256_HMAC: 561 return (32); 562 case CRYPTO_SHA2_384_HMAC: 563 return (48); 564 case CRYPTO_SHA2_512_HMAC: 565 return (64); 566 } 567 return (0); 568} 569 570#ifdef _KERNEL 571int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 572 struct g_eli_metadata *md); 573struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 574 struct g_provider *bpp, const struct g_eli_metadata *md, 575 const u_char *mkey, int nkey); 576int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 577 578int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 579void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 580 581void g_eli_read_done(struct bio *bp); 582void g_eli_write_done(struct bio *bp); 583int g_eli_crypto_rerun(struct cryptop *crp); 584void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 585 size_t size); 586 587void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker); 588void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 589 590void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 591void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 592#endif 593 594void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 595int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 596 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 597int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 598 unsigned char *mkey); 599#ifdef _KERNEL 600void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 601#endif 602 603int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 604 const u_char *key, size_t keysize); 605int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 606 const u_char *key, size_t keysize); 607 608struct hmac_ctx { 609 SHA512_CTX shactx; 610 u_char k_opad[128]; 611}; 612 613void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 614 size_t hkeylen); 615void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 616 size_t datasize); 617void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 618void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 619 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 620 621#ifdef _KERNEL 622void g_eli_key_init(struct g_eli_softc *sc); 623void g_eli_key_destroy(struct g_eli_softc *sc); 624uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize); 625void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey); 626#endif 627#endif /* !_G_ELI_H_ */ 628