1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005-2019 Pawel Jakub Dawidek <pawel@dawidek.net> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _G_ELI_H_ 32 #define _G_ELI_H_ 33 34 #include <sys/endian.h> 35 #include <sys/errno.h> 36 #include <sys/malloc.h> 37 #include <crypto/sha2/sha256.h> 38 #include <crypto/sha2/sha512.h> 39 #include <opencrypto/cryptodev.h> 40 #ifdef _KERNEL 41 #include <sys/bio.h> 42 #include <sys/libkern.h> 43 #include <sys/lock.h> 44 #include <sys/mutex.h> 45 #include <geom/geom.h> 46 #include <crypto/intake.h> 47 #else 48 #include <assert.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <strings.h> 52 #endif 53 #include <sys/queue.h> 54 #include <sys/tree.h> 55 #ifndef _OpenSSL_ 56 #include <sys/md5.h> 57 #endif 58 59 #define G_ELI_CLASS_NAME "ELI" 60 #define G_ELI_MAGIC "GEOM::ELI" 61 #define G_ELI_SUFFIX ".eli" 62 63 /* 64 * Version history: 65 * 0 - Initial version number. 66 * 1 - Added data authentication support (md_aalgo field and 67 * G_ELI_FLAG_AUTH flag). 68 * 2 - Added G_ELI_FLAG_READONLY. 69 * 3 - Added 'configure' subcommand. 70 * 4 - IV is generated from offset converted to little-endian 71 * (the G_ELI_FLAG_NATIVE_BYTE_ORDER flag will be set for older versions). 72 * 5 - Added multiple encrypton keys and AES-XTS support. 73 * 6 - Fixed usage of multiple keys for authenticated providers (the 74 * G_ELI_FLAG_FIRST_KEY flag will be set for older versions). 75 * 7 - Encryption keys are now generated from the Data Key and not from the 76 * IV Key (the G_ELI_FLAG_ENC_IVKEY flag will be set for older versions). 77 */ 78 #define G_ELI_VERSION_00 0 79 #define G_ELI_VERSION_01 1 80 #define G_ELI_VERSION_02 2 81 #define G_ELI_VERSION_03 3 82 #define G_ELI_VERSION_04 4 83 #define G_ELI_VERSION_05 5 84 #define G_ELI_VERSION_06 6 85 #define G_ELI_VERSION_07 7 86 #define G_ELI_VERSION G_ELI_VERSION_07 87 88 /* ON DISK FLAGS. */ 89 /* Use random, onetime keys. */ 90 #define G_ELI_FLAG_ONETIME 0x00000001 91 /* Ask for the passphrase from the kernel, before mounting root. */ 92 #define G_ELI_FLAG_BOOT 0x00000002 93 /* Detach on last close, if we were open for writing. */ 94 #define G_ELI_FLAG_WO_DETACH 0x00000004 95 /* Detach on last close. */ 96 #define G_ELI_FLAG_RW_DETACH 0x00000008 97 /* Provide data authentication. */ 98 #define G_ELI_FLAG_AUTH 0x00000010 99 /* Provider is read-only, we should deny all write attempts. */ 100 #define G_ELI_FLAG_RO 0x00000020 101 /* Don't pass through BIO_DELETE requests. */ 102 #define G_ELI_FLAG_NODELETE 0x00000040 103 /* This GELI supports GELIBoot */ 104 #define G_ELI_FLAG_GELIBOOT 0x00000080 105 /* Hide passphrase length in GELIboot. */ 106 #define G_ELI_FLAG_GELIDISPLAYPASS 0x00000100 107 /* Expand provider automatically. */ 108 #define G_ELI_FLAG_AUTORESIZE 0x00000200 109 110 /* RUNTIME FLAGS. */ 111 /* Provider was open for writing. */ 112 #define G_ELI_FLAG_WOPEN 0x00010000 113 /* Destroy device. */ 114 #define G_ELI_FLAG_DESTROY 0x00020000 115 /* Provider uses native byte-order for IV generation. */ 116 #define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 117 /* Provider uses single encryption key. */ 118 #define G_ELI_FLAG_SINGLE_KEY 0x00080000 119 /* Device suspended. */ 120 #define G_ELI_FLAG_SUSPEND 0x00100000 121 /* Provider uses first encryption key. */ 122 #define G_ELI_FLAG_FIRST_KEY 0x00200000 123 /* Provider uses IV-Key for encryption key generation. */ 124 #define G_ELI_FLAG_ENC_IVKEY 0x00400000 125 126 #define G_ELI_NEW_BIO 255 127 128 #define SHA512_MDLEN 64 129 #define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 130 131 #define G_ELI_MAXMKEYS 2 132 #define G_ELI_MAXKEYLEN 64 133 #define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 134 #define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 135 #define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 136 #define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 137 #define G_ELI_SALTLEN 64 138 #define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 139 /* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 140 #define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 141 #define G_ELI_OVERWRITES 5 142 /* Switch data encryption key every 2^20 blocks. */ 143 #define G_ELI_KEY_SHIFT 20 144 145 #define G_ELI_CRYPTO_UNKNOWN 0 146 #define G_ELI_CRYPTO_HW 1 147 #define G_ELI_CRYPTO_SW 2 148 149 #ifdef _KERNEL 150 #if (MAX_KEY_BYTES < G_ELI_DATAIVKEYLEN) 151 #error "MAX_KEY_BYTES is less than G_ELI_DATAKEYLEN" 152 #endif 153 154 extern int g_eli_debug; 155 extern u_int g_eli_overwrites; 156 extern u_int g_eli_batch; 157 158 #define G_ELI_DEBUG(lvl, ...) do { \ 159 if (g_eli_debug >= (lvl)) { \ 160 printf("GEOM_ELI"); \ 161 if (g_eli_debug > 0) \ 162 printf("[%u]", lvl); \ 163 printf(": "); \ 164 printf(__VA_ARGS__); \ 165 printf("\n"); \ 166 } \ 167 } while (0) 168 #define G_ELI_LOGREQ(lvl, bp, ...) do { \ 169 if (g_eli_debug >= (lvl)) { \ 170 printf("GEOM_ELI"); \ 171 if (g_eli_debug > 0) \ 172 printf("[%u]", lvl); \ 173 printf(": "); \ 174 printf(__VA_ARGS__); \ 175 printf(" "); \ 176 g_print_bio(bp); \ 177 printf("\n"); \ 178 } \ 179 } while (0) 180 181 struct g_eli_worker { 182 struct g_eli_softc *w_softc; 183 struct proc *w_proc; 184 u_int w_number; 185 crypto_session_t w_sid; 186 boolean_t w_active; 187 LIST_ENTRY(g_eli_worker) w_next; 188 }; 189 190 #endif /* _KERNEL */ 191 192 struct g_eli_softc { 193 struct g_geom *sc_geom; 194 u_int sc_version; 195 u_int sc_crypto; 196 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 197 uint8_t sc_ekey[G_ELI_DATAKEYLEN]; 198 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue; 199 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree; 200 struct mtx sc_ekeys_lock; 201 uint64_t sc_ekeys_total; 202 uint64_t sc_ekeys_allocated; 203 u_int sc_ealgo; 204 u_int sc_ekeylen; 205 uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 206 u_int sc_aalgo; 207 u_int sc_akeylen; 208 u_int sc_alen; 209 SHA256_CTX sc_akeyctx; 210 uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 211 SHA256_CTX sc_ivctx; 212 int sc_nkey; 213 uint32_t sc_flags; 214 int sc_inflight; 215 off_t sc_mediasize; 216 size_t sc_sectorsize; 217 off_t sc_provsize; 218 u_int sc_bytes_per_sector; 219 u_int sc_data_per_sector; 220 #ifndef _KERNEL 221 int sc_cpubind; 222 #else /* _KERNEL */ 223 boolean_t sc_cpubind; 224 225 /* Only for software cryptography. */ 226 struct bio_queue_head sc_queue; 227 struct mtx sc_queue_mtx; 228 LIST_HEAD(, g_eli_worker) sc_workers; 229 #endif /* _KERNEL */ 230 }; 231 #define sc_name sc_geom->name 232 233 #define G_ELI_KEY_MAGIC 0xe11341c 234 235 struct g_eli_key { 236 /* Key value, must be first in the structure. */ 237 uint8_t gek_key[G_ELI_DATAKEYLEN]; 238 /* Magic. */ 239 int gek_magic; 240 /* Key number. */ 241 uint64_t gek_keyno; 242 /* Reference counter. */ 243 int gek_count; 244 /* Keeps keys sorted by most recent use. */ 245 TAILQ_ENTRY(g_eli_key) gek_next; 246 /* Keeps keys sorted by number. */ 247 RB_ENTRY(g_eli_key) gek_link; 248 }; 249 250 struct g_eli_metadata { 251 char md_magic[16]; /* Magic value. */ 252 uint32_t md_version; /* Version number. */ 253 uint32_t md_flags; /* Additional flags. */ 254 uint16_t md_ealgo; /* Encryption algorithm. */ 255 uint16_t md_keylen; /* Key length. */ 256 uint16_t md_aalgo; /* Authentication algorithm. */ 257 uint64_t md_provsize; /* Provider's size. */ 258 uint32_t md_sectorsize; /* Sector size. */ 259 uint8_t md_keys; /* Available keys. */ 260 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 261 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 262 /* Encrypted master key (IV-key, Data-key, HMAC). */ 263 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 264 u_char md_hash[16]; /* MD5 hash. */ 265 } __packed; 266 #ifndef _OpenSSL_ 267 static __inline void 268 eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap) 269 { 270 u_char *p; 271 272 p = *datap; 273 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 274 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 275 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 276 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 277 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 278 *p = md->md_keys; p += sizeof(md->md_keys); 279 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 280 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 281 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 282 *datap = p; 283 } 284 static __inline void 285 eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata *md, u_char **datap) 286 { 287 u_char *p; 288 289 p = *datap; 290 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 291 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 292 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 293 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 294 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 295 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 296 *p = md->md_keys; p += sizeof(md->md_keys); 297 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 298 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 299 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 300 *datap = p; 301 } 302 static __inline void 303 eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 304 { 305 uint32_t hash[4]; 306 MD5_CTX ctx; 307 u_char *p; 308 309 p = data; 310 bcopy(md->md_magic, p, sizeof(md->md_magic)); 311 p += sizeof(md->md_magic); 312 le32enc(p, md->md_version); 313 p += sizeof(md->md_version); 314 switch (md->md_version) { 315 case G_ELI_VERSION_00: 316 eli_metadata_encode_v0(md, &p); 317 break; 318 case G_ELI_VERSION_01: 319 case G_ELI_VERSION_02: 320 case G_ELI_VERSION_03: 321 case G_ELI_VERSION_04: 322 case G_ELI_VERSION_05: 323 case G_ELI_VERSION_06: 324 case G_ELI_VERSION_07: 325 eli_metadata_encode_v1v2v3v4v5v6v7(md, &p); 326 break; 327 default: 328 #ifdef _KERNEL 329 panic("%s: Unsupported version %u.", __func__, 330 (u_int)md->md_version); 331 #else 332 assert(!"Unsupported metadata version."); 333 #endif 334 } 335 MD5Init(&ctx); 336 MD5Update(&ctx, data, p - data); 337 MD5Final((void *)hash, &ctx); 338 bcopy(hash, md->md_hash, sizeof(md->md_hash)); 339 bcopy(md->md_hash, p, sizeof(md->md_hash)); 340 } 341 static __inline int 342 eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 343 { 344 uint32_t hash[4]; 345 MD5_CTX ctx; 346 const u_char *p; 347 348 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 349 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 350 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 351 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 352 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 353 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 354 md->md_keys = *p; p += sizeof(md->md_keys); 355 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 356 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 357 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 358 MD5Init(&ctx); 359 MD5Update(&ctx, data, p - data); 360 MD5Final((void *)hash, &ctx); 361 bcopy(hash, md->md_hash, sizeof(md->md_hash)); 362 if (bcmp(md->md_hash, p, 16) != 0) 363 return (EINVAL); 364 return (0); 365 } 366 367 static __inline int 368 eli_metadata_decode_v1v2v3v4v5v6v7(const u_char *data, struct g_eli_metadata *md) 369 { 370 uint32_t hash[4]; 371 MD5_CTX ctx; 372 const u_char *p; 373 374 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 375 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 376 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 377 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 378 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 379 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 380 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 381 md->md_keys = *p; p += sizeof(md->md_keys); 382 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 383 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 384 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 385 MD5Init(&ctx); 386 MD5Update(&ctx, data, p - data); 387 MD5Final((void *)hash, &ctx); 388 bcopy(hash, md->md_hash, sizeof(md->md_hash)); 389 if (bcmp(md->md_hash, p, 16) != 0) 390 return (EINVAL); 391 return (0); 392 } 393 static __inline int 394 eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 395 { 396 int error; 397 398 bcopy(data, md->md_magic, sizeof(md->md_magic)); 399 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0) 400 return (EINVAL); 401 md->md_version = le32dec(data + sizeof(md->md_magic)); 402 switch (md->md_version) { 403 case G_ELI_VERSION_00: 404 error = eli_metadata_decode_v0(data, md); 405 break; 406 case G_ELI_VERSION_01: 407 case G_ELI_VERSION_02: 408 case G_ELI_VERSION_03: 409 case G_ELI_VERSION_04: 410 case G_ELI_VERSION_05: 411 case G_ELI_VERSION_06: 412 case G_ELI_VERSION_07: 413 error = eli_metadata_decode_v1v2v3v4v5v6v7(data, md); 414 break; 415 default: 416 error = EOPNOTSUPP; 417 break; 418 } 419 return (error); 420 } 421 #endif /* !_OpenSSL */ 422 423 static __inline u_int 424 g_eli_str2ealgo(const char *name) 425 { 426 427 if (strcasecmp("null", name) == 0) 428 return (CRYPTO_NULL_CBC); 429 else if (strcasecmp("null-cbc", name) == 0) 430 return (CRYPTO_NULL_CBC); 431 else if (strcasecmp("aes", name) == 0) 432 return (CRYPTO_AES_XTS); 433 else if (strcasecmp("aes-cbc", name) == 0) 434 return (CRYPTO_AES_CBC); 435 else if (strcasecmp("aes-xts", name) == 0) 436 return (CRYPTO_AES_XTS); 437 else if (strcasecmp("blowfish", name) == 0) 438 return (CRYPTO_BLF_CBC); 439 else if (strcasecmp("blowfish-cbc", name) == 0) 440 return (CRYPTO_BLF_CBC); 441 else if (strcasecmp("camellia", name) == 0) 442 return (CRYPTO_CAMELLIA_CBC); 443 else if (strcasecmp("camellia-cbc", name) == 0) 444 return (CRYPTO_CAMELLIA_CBC); 445 else if (strcasecmp("3des", name) == 0) 446 return (CRYPTO_3DES_CBC); 447 else if (strcasecmp("3des-cbc", name) == 0) 448 return (CRYPTO_3DES_CBC); 449 return (CRYPTO_ALGORITHM_MIN - 1); 450 } 451 452 static __inline u_int 453 g_eli_str2aalgo(const char *name) 454 { 455 456 if (strcasecmp("hmac/md5", name) == 0) 457 return (CRYPTO_MD5_HMAC); 458 else if (strcasecmp("hmac/sha1", name) == 0) 459 return (CRYPTO_SHA1_HMAC); 460 else if (strcasecmp("hmac/ripemd160", name) == 0) 461 return (CRYPTO_RIPEMD160_HMAC); 462 else if (strcasecmp("hmac/sha256", name) == 0) 463 return (CRYPTO_SHA2_256_HMAC); 464 else if (strcasecmp("hmac/sha384", name) == 0) 465 return (CRYPTO_SHA2_384_HMAC); 466 else if (strcasecmp("hmac/sha512", name) == 0) 467 return (CRYPTO_SHA2_512_HMAC); 468 return (CRYPTO_ALGORITHM_MIN - 1); 469 } 470 471 static __inline const char * 472 g_eli_algo2str(u_int algo) 473 { 474 475 switch (algo) { 476 case CRYPTO_NULL_CBC: 477 return ("NULL"); 478 case CRYPTO_AES_CBC: 479 return ("AES-CBC"); 480 case CRYPTO_AES_XTS: 481 return ("AES-XTS"); 482 case CRYPTO_BLF_CBC: 483 return ("Blowfish-CBC"); 484 case CRYPTO_CAMELLIA_CBC: 485 return ("CAMELLIA-CBC"); 486 case CRYPTO_3DES_CBC: 487 return ("3DES-CBC"); 488 case CRYPTO_MD5_HMAC: 489 return ("HMAC/MD5"); 490 case CRYPTO_SHA1_HMAC: 491 return ("HMAC/SHA1"); 492 case CRYPTO_RIPEMD160_HMAC: 493 return ("HMAC/RIPEMD160"); 494 case CRYPTO_SHA2_256_HMAC: 495 return ("HMAC/SHA256"); 496 case CRYPTO_SHA2_384_HMAC: 497 return ("HMAC/SHA384"); 498 case CRYPTO_SHA2_512_HMAC: 499 return ("HMAC/SHA512"); 500 } 501 return ("unknown"); 502 } 503 504 static __inline void 505 eli_metadata_dump(const struct g_eli_metadata *md) 506 { 507 static const char hex[] = "0123456789abcdef"; 508 char str[sizeof(md->md_mkeys) * 2 + 1]; 509 u_int i; 510 511 printf(" magic: %s\n", md->md_magic); 512 printf(" version: %u\n", (u_int)md->md_version); 513 printf(" flags: 0x%x\n", (u_int)md->md_flags); 514 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 515 printf(" keylen: %u\n", (u_int)md->md_keylen); 516 if (md->md_flags & G_ELI_FLAG_AUTH) 517 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 518 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 519 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 520 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 521 printf("iterations: %d\n", (int)md->md_iterations); 522 bzero(str, sizeof(str)); 523 for (i = 0; i < sizeof(md->md_salt); i++) { 524 str[i * 2] = hex[md->md_salt[i] >> 4]; 525 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 526 } 527 printf(" Salt: %s\n", str); 528 bzero(str, sizeof(str)); 529 for (i = 0; i < sizeof(md->md_mkeys); i++) { 530 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 531 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 532 } 533 printf("Master Key: %s\n", str); 534 bzero(str, sizeof(str)); 535 for (i = 0; i < 16; i++) { 536 str[i * 2] = hex[md->md_hash[i] >> 4]; 537 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 538 } 539 printf(" MD5 hash: %s\n", str); 540 } 541 542 static __inline u_int 543 g_eli_keylen(u_int algo, u_int keylen) 544 { 545 546 switch (algo) { 547 case CRYPTO_NULL_CBC: 548 if (keylen == 0) 549 keylen = 64 * 8; 550 else { 551 if (keylen > 64 * 8) 552 keylen = 0; 553 } 554 return (keylen); 555 case CRYPTO_AES_CBC: 556 case CRYPTO_CAMELLIA_CBC: 557 switch (keylen) { 558 case 0: 559 return (128); 560 case 128: 561 case 192: 562 case 256: 563 return (keylen); 564 default: 565 return (0); 566 } 567 case CRYPTO_AES_XTS: 568 switch (keylen) { 569 case 0: 570 return (128); 571 case 128: 572 case 256: 573 return (keylen); 574 default: 575 return (0); 576 } 577 case CRYPTO_BLF_CBC: 578 if (keylen == 0) 579 return (128); 580 if (keylen < 128 || keylen > 448) 581 return (0); 582 if ((keylen % 32) != 0) 583 return (0); 584 return (keylen); 585 case CRYPTO_3DES_CBC: 586 if (keylen == 0 || keylen == 192) 587 return (192); 588 return (0); 589 default: 590 return (0); 591 } 592 } 593 594 static __inline u_int 595 g_eli_hashlen(u_int algo) 596 { 597 598 switch (algo) { 599 case CRYPTO_MD5_HMAC: 600 return (16); 601 case CRYPTO_SHA1_HMAC: 602 return (20); 603 case CRYPTO_RIPEMD160_HMAC: 604 return (20); 605 case CRYPTO_SHA2_256_HMAC: 606 return (32); 607 case CRYPTO_SHA2_384_HMAC: 608 return (48); 609 case CRYPTO_SHA2_512_HMAC: 610 return (64); 611 } 612 return (0); 613 } 614 615 static __inline off_t 616 eli_mediasize(const struct g_eli_softc *sc, off_t mediasize, u_int sectorsize) 617 { 618 619 if ((sc->sc_flags & G_ELI_FLAG_ONETIME) == 0) { 620 mediasize -= sectorsize; 621 } 622 if ((sc->sc_flags & G_ELI_FLAG_AUTH) == 0) { 623 mediasize -= (mediasize % sc->sc_sectorsize); 624 } else { 625 mediasize /= sc->sc_bytes_per_sector; 626 mediasize *= sc->sc_sectorsize; 627 } 628 629 return (mediasize); 630 } 631 632 static __inline void 633 eli_metadata_softc(struct g_eli_softc *sc, const struct g_eli_metadata *md, 634 u_int sectorsize, off_t mediasize) 635 { 636 637 sc->sc_version = md->md_version; 638 sc->sc_inflight = 0; 639 sc->sc_crypto = G_ELI_CRYPTO_UNKNOWN; 640 sc->sc_flags = md->md_flags; 641 /* Backward compatibility. */ 642 if (md->md_version < G_ELI_VERSION_04) 643 sc->sc_flags |= G_ELI_FLAG_NATIVE_BYTE_ORDER; 644 if (md->md_version < G_ELI_VERSION_05) 645 sc->sc_flags |= G_ELI_FLAG_SINGLE_KEY; 646 if (md->md_version < G_ELI_VERSION_06 && 647 (sc->sc_flags & G_ELI_FLAG_AUTH) != 0) { 648 sc->sc_flags |= G_ELI_FLAG_FIRST_KEY; 649 } 650 if (md->md_version < G_ELI_VERSION_07) 651 sc->sc_flags |= G_ELI_FLAG_ENC_IVKEY; 652 sc->sc_ealgo = md->md_ealgo; 653 654 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 655 sc->sc_akeylen = sizeof(sc->sc_akey) * 8; 656 sc->sc_aalgo = md->md_aalgo; 657 sc->sc_alen = g_eli_hashlen(sc->sc_aalgo); 658 659 sc->sc_data_per_sector = sectorsize - sc->sc_alen; 660 /* 661 * Some hash functions (like SHA1 and RIPEMD160) generates hash 662 * which length is not multiple of 128 bits, but we want data 663 * length to be multiple of 128, so we can encrypt without 664 * padding. The line below rounds down data length to multiple 665 * of 128 bits. 666 */ 667 sc->sc_data_per_sector -= sc->sc_data_per_sector % 16; 668 669 sc->sc_bytes_per_sector = 670 (md->md_sectorsize - 1) / sc->sc_data_per_sector + 1; 671 sc->sc_bytes_per_sector *= sectorsize; 672 } 673 sc->sc_provsize = mediasize; 674 sc->sc_sectorsize = md->md_sectorsize; 675 sc->sc_mediasize = eli_mediasize(sc, mediasize, sectorsize); 676 sc->sc_ekeylen = md->md_keylen; 677 } 678 679 #ifdef _KERNEL 680 int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 681 struct g_eli_metadata *md); 682 struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 683 struct g_provider *bpp, const struct g_eli_metadata *md, 684 const u_char *mkey, int nkey); 685 int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 686 687 int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 688 void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 689 690 void g_eli_read_done(struct bio *bp); 691 void g_eli_write_done(struct bio *bp); 692 int g_eli_crypto_rerun(struct cryptop *crp); 693 694 void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker); 695 void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 696 697 void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 698 void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 699 #endif 700 void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 701 size_t size); 702 703 void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 704 int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 705 const unsigned char *key, unsigned char *mkey, unsigned keyp); 706 int g_eli_mkey_decrypt_any(const struct g_eli_metadata *md, 707 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 708 int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 709 unsigned char *mkey); 710 #ifdef _KERNEL 711 void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 712 #endif 713 714 int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 715 const u_char *key, size_t keysize); 716 int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 717 const u_char *key, size_t keysize); 718 719 struct hmac_ctx { 720 SHA512_CTX innerctx; 721 SHA512_CTX outerctx; 722 }; 723 724 void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 725 size_t hkeylen); 726 void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 727 size_t datasize); 728 void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 729 void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 730 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 731 732 void g_eli_key_fill(struct g_eli_softc *sc, struct g_eli_key *key, 733 uint64_t keyno); 734 #ifdef _KERNEL 735 void g_eli_key_init(struct g_eli_softc *sc); 736 void g_eli_key_destroy(struct g_eli_softc *sc); 737 void g_eli_key_resize(struct g_eli_softc *sc); 738 uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize); 739 void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey); 740 #endif 741 #endif /* !_G_ELI_H_ */ 742