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 * $FreeBSD$ 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 /* Don't pass through BIO_DELETE requests. */ 99 #define G_ELI_FLAG_NODELETE 0x00000040 100 /* RUNTIME FLAGS. */ 101 /* Provider was open for writing. */ 102 #define G_ELI_FLAG_WOPEN 0x00010000 103 /* Destroy device. */ 104 #define G_ELI_FLAG_DESTROY 0x00020000 105 /* Provider uses native byte-order for IV generation. */ 106 #define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 107 /* Provider uses single encryption key. */ 108 #define G_ELI_FLAG_SINGLE_KEY 0x00080000 109 /* Device suspended. */ 110 #define G_ELI_FLAG_SUSPEND 0x00100000 111 /* Provider uses first encryption key. */ 112 #define G_ELI_FLAG_FIRST_KEY 0x00200000 113 /* Provider uses IV-Key for encryption key generation. */ 114 #define G_ELI_FLAG_ENC_IVKEY 0x00400000 115 116 #define G_ELI_NEW_BIO 255 117 118 #define SHA512_MDLEN 64 119 #define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 120 121 #define G_ELI_MAXMKEYS 2 122 #define G_ELI_MAXKEYLEN 64 123 #define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 124 #define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 125 #define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 126 #define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 127 #define G_ELI_SALTLEN 64 128 #define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 129 /* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 130 #define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 131 #define G_ELI_OVERWRITES 5 132 /* Switch data encryption key every 2^20 blocks. */ 133 #define G_ELI_KEY_SHIFT 20 134 135 #ifdef _KERNEL 136 extern int g_eli_debug; 137 extern u_int g_eli_overwrites; 138 extern u_int g_eli_batch; 139 140 #define G_ELI_CRYPTO_UNKNOWN 0 141 #define G_ELI_CRYPTO_HW 1 142 #define G_ELI_CRYPTO_SW 2 143 144 #define G_ELI_DEBUG(lvl, ...) do { \ 145 if (g_eli_debug >= (lvl)) { \ 146 printf("GEOM_ELI"); \ 147 if (g_eli_debug > 0) \ 148 printf("[%u]", lvl); \ 149 printf(": "); \ 150 printf(__VA_ARGS__); \ 151 printf("\n"); \ 152 } \ 153 } while (0) 154 #define G_ELI_LOGREQ(lvl, bp, ...) do { \ 155 if (g_eli_debug >= (lvl)) { \ 156 printf("GEOM_ELI"); \ 157 if (g_eli_debug > 0) \ 158 printf("[%u]", lvl); \ 159 printf(": "); \ 160 printf(__VA_ARGS__); \ 161 printf(" "); \ 162 g_print_bio(bp); \ 163 printf("\n"); \ 164 } \ 165 } while (0) 166 167 struct g_eli_worker { 168 struct g_eli_softc *w_softc; 169 struct proc *w_proc; 170 u_int w_number; 171 uint64_t w_sid; 172 boolean_t w_active; 173 LIST_ENTRY(g_eli_worker) w_next; 174 }; 175 176 struct g_eli_softc { 177 struct g_geom *sc_geom; 178 u_int sc_version; 179 u_int sc_crypto; 180 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 181 uint8_t sc_ekey[G_ELI_DATAKEYLEN]; 182 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue; 183 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree; 184 struct mtx sc_ekeys_lock; 185 uint64_t sc_ekeys_total; 186 uint64_t sc_ekeys_allocated; 187 u_int sc_ealgo; 188 u_int sc_ekeylen; 189 uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 190 u_int sc_aalgo; 191 u_int sc_akeylen; 192 u_int sc_alen; 193 SHA256_CTX sc_akeyctx; 194 uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 195 SHA256_CTX sc_ivctx; 196 int sc_nkey; 197 uint32_t sc_flags; 198 int sc_inflight; 199 off_t sc_mediasize; 200 size_t sc_sectorsize; 201 u_int sc_bytes_per_sector; 202 u_int sc_data_per_sector; 203 boolean_t sc_cpubind; 204 205 /* Only for software cryptography. */ 206 struct bio_queue_head sc_queue; 207 struct mtx sc_queue_mtx; 208 LIST_HEAD(, g_eli_worker) sc_workers; 209 }; 210 #define sc_name sc_geom->name 211 #endif /* _KERNEL */ 212 213 struct g_eli_metadata { 214 char md_magic[16]; /* Magic value. */ 215 uint32_t md_version; /* Version number. */ 216 uint32_t md_flags; /* Additional flags. */ 217 uint16_t md_ealgo; /* Encryption algorithm. */ 218 uint16_t md_keylen; /* Key length. */ 219 uint16_t md_aalgo; /* Authentication algorithm. */ 220 uint64_t md_provsize; /* Provider's size. */ 221 uint32_t md_sectorsize; /* Sector size. */ 222 uint8_t md_keys; /* Available keys. */ 223 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 224 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 225 /* Encrypted master key (IV-key, Data-key, HMAC). */ 226 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 227 u_char md_hash[16]; /* MD5 hash. */ 228 } __packed; 229 #ifndef _OpenSSL_ 230 static __inline void 231 eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap) 232 { 233 u_char *p; 234 235 p = *datap; 236 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 237 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 238 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 239 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 240 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 241 *p = md->md_keys; p += sizeof(md->md_keys); 242 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 243 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 244 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 245 *datap = p; 246 } 247 static __inline void 248 eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata *md, u_char **datap) 249 { 250 u_char *p; 251 252 p = *datap; 253 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 254 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 255 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 256 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 257 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 258 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 259 *p = md->md_keys; p += sizeof(md->md_keys); 260 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 261 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 262 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 263 *datap = p; 264 } 265 static __inline void 266 eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 267 { 268 MD5_CTX ctx; 269 u_char *p; 270 271 p = data; 272 bcopy(md->md_magic, p, sizeof(md->md_magic)); 273 p += sizeof(md->md_magic); 274 le32enc(p, md->md_version); 275 p += sizeof(md->md_version); 276 switch (md->md_version) { 277 case G_ELI_VERSION_00: 278 eli_metadata_encode_v0(md, &p); 279 break; 280 case G_ELI_VERSION_01: 281 case G_ELI_VERSION_02: 282 case G_ELI_VERSION_03: 283 case G_ELI_VERSION_04: 284 case G_ELI_VERSION_05: 285 case G_ELI_VERSION_06: 286 case G_ELI_VERSION_07: 287 eli_metadata_encode_v1v2v3v4v5v6v7(md, &p); 288 break; 289 default: 290 #ifdef _KERNEL 291 panic("%s: Unsupported version %u.", __func__, 292 (u_int)md->md_version); 293 #else 294 assert(!"Unsupported metadata version."); 295 #endif 296 } 297 MD5Init(&ctx); 298 MD5Update(&ctx, data, p - data); 299 MD5Final(md->md_hash, &ctx); 300 bcopy(md->md_hash, p, sizeof(md->md_hash)); 301 } 302 static __inline int 303 eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 304 { 305 MD5_CTX ctx; 306 const u_char *p; 307 308 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 309 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 310 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 311 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 312 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 313 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 314 md->md_keys = *p; p += sizeof(md->md_keys); 315 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 316 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 317 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 318 MD5Init(&ctx); 319 MD5Update(&ctx, data, p - data); 320 MD5Final(md->md_hash, &ctx); 321 if (bcmp(md->md_hash, p, 16) != 0) 322 return (EINVAL); 323 return (0); 324 } 325 326 static __inline int 327 eli_metadata_decode_v1v2v3v4v5v6v7(const u_char *data, struct g_eli_metadata *md) 328 { 329 MD5_CTX ctx; 330 const u_char *p; 331 332 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 333 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 334 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 335 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 336 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 337 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 338 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 339 md->md_keys = *p; p += sizeof(md->md_keys); 340 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 341 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 342 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 343 MD5Init(&ctx); 344 MD5Update(&ctx, data, p - data); 345 MD5Final(md->md_hash, &ctx); 346 if (bcmp(md->md_hash, p, 16) != 0) 347 return (EINVAL); 348 return (0); 349 } 350 static __inline int 351 eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 352 { 353 int error; 354 355 bcopy(data, md->md_magic, sizeof(md->md_magic)); 356 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0) 357 return (EINVAL); 358 md->md_version = le32dec(data + sizeof(md->md_magic)); 359 switch (md->md_version) { 360 case G_ELI_VERSION_00: 361 error = eli_metadata_decode_v0(data, md); 362 break; 363 case G_ELI_VERSION_01: 364 case G_ELI_VERSION_02: 365 case G_ELI_VERSION_03: 366 case G_ELI_VERSION_04: 367 case G_ELI_VERSION_05: 368 case G_ELI_VERSION_06: 369 case G_ELI_VERSION_07: 370 error = eli_metadata_decode_v1v2v3v4v5v6v7(data, md); 371 break; 372 default: 373 error = EOPNOTSUPP; 374 break; 375 } 376 return (error); 377 } 378 #endif /* !_OpenSSL */ 379 380 static __inline u_int 381 g_eli_str2ealgo(const char *name) 382 { 383 384 if (strcasecmp("null", name) == 0) 385 return (CRYPTO_NULL_CBC); 386 else if (strcasecmp("null-cbc", name) == 0) 387 return (CRYPTO_NULL_CBC); 388 else if (strcasecmp("aes", name) == 0) 389 return (CRYPTO_AES_XTS); 390 else if (strcasecmp("aes-cbc", name) == 0) 391 return (CRYPTO_AES_CBC); 392 else if (strcasecmp("aes-xts", name) == 0) 393 return (CRYPTO_AES_XTS); 394 else if (strcasecmp("blowfish", name) == 0) 395 return (CRYPTO_BLF_CBC); 396 else if (strcasecmp("blowfish-cbc", name) == 0) 397 return (CRYPTO_BLF_CBC); 398 else if (strcasecmp("camellia", name) == 0) 399 return (CRYPTO_CAMELLIA_CBC); 400 else if (strcasecmp("camellia-cbc", name) == 0) 401 return (CRYPTO_CAMELLIA_CBC); 402 else if (strcasecmp("3des", name) == 0) 403 return (CRYPTO_3DES_CBC); 404 else if (strcasecmp("3des-cbc", name) == 0) 405 return (CRYPTO_3DES_CBC); 406 return (CRYPTO_ALGORITHM_MIN - 1); 407 } 408 409 static __inline u_int 410 g_eli_str2aalgo(const char *name) 411 { 412 413 if (strcasecmp("hmac/md5", name) == 0) 414 return (CRYPTO_MD5_HMAC); 415 else if (strcasecmp("hmac/sha1", name) == 0) 416 return (CRYPTO_SHA1_HMAC); 417 else if (strcasecmp("hmac/ripemd160", name) == 0) 418 return (CRYPTO_RIPEMD160_HMAC); 419 else if (strcasecmp("hmac/sha256", name) == 0) 420 return (CRYPTO_SHA2_256_HMAC); 421 else if (strcasecmp("hmac/sha384", name) == 0) 422 return (CRYPTO_SHA2_384_HMAC); 423 else if (strcasecmp("hmac/sha512", name) == 0) 424 return (CRYPTO_SHA2_512_HMAC); 425 return (CRYPTO_ALGORITHM_MIN - 1); 426 } 427 428 static __inline const char * 429 g_eli_algo2str(u_int algo) 430 { 431 432 switch (algo) { 433 case CRYPTO_NULL_CBC: 434 return ("NULL"); 435 case CRYPTO_AES_CBC: 436 return ("AES-CBC"); 437 case CRYPTO_AES_XTS: 438 return ("AES-XTS"); 439 case CRYPTO_BLF_CBC: 440 return ("Blowfish-CBC"); 441 case CRYPTO_CAMELLIA_CBC: 442 return ("CAMELLIA-CBC"); 443 case CRYPTO_3DES_CBC: 444 return ("3DES-CBC"); 445 case CRYPTO_MD5_HMAC: 446 return ("HMAC/MD5"); 447 case CRYPTO_SHA1_HMAC: 448 return ("HMAC/SHA1"); 449 case CRYPTO_RIPEMD160_HMAC: 450 return ("HMAC/RIPEMD160"); 451 case CRYPTO_SHA2_256_HMAC: 452 return ("HMAC/SHA256"); 453 case CRYPTO_SHA2_384_HMAC: 454 return ("HMAC/SHA384"); 455 case CRYPTO_SHA2_512_HMAC: 456 return ("HMAC/SHA512"); 457 } 458 return ("unknown"); 459 } 460 461 static __inline void 462 eli_metadata_dump(const struct g_eli_metadata *md) 463 { 464 static const char hex[] = "0123456789abcdef"; 465 char str[sizeof(md->md_mkeys) * 2 + 1]; 466 u_int i; 467 468 printf(" magic: %s\n", md->md_magic); 469 printf(" version: %u\n", (u_int)md->md_version); 470 printf(" flags: 0x%x\n", (u_int)md->md_flags); 471 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 472 printf(" keylen: %u\n", (u_int)md->md_keylen); 473 if (md->md_flags & G_ELI_FLAG_AUTH) 474 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 475 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 476 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 477 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 478 printf("iterations: %u\n", (u_int)md->md_iterations); 479 bzero(str, sizeof(str)); 480 for (i = 0; i < sizeof(md->md_salt); i++) { 481 str[i * 2] = hex[md->md_salt[i] >> 4]; 482 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 483 } 484 printf(" Salt: %s\n", str); 485 bzero(str, sizeof(str)); 486 for (i = 0; i < sizeof(md->md_mkeys); i++) { 487 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 488 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 489 } 490 printf("Master Key: %s\n", str); 491 bzero(str, sizeof(str)); 492 for (i = 0; i < 16; i++) { 493 str[i * 2] = hex[md->md_hash[i] >> 4]; 494 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 495 } 496 printf(" MD5 hash: %s\n", str); 497 } 498 499 static __inline u_int 500 g_eli_keylen(u_int algo, u_int keylen) 501 { 502 503 switch (algo) { 504 case CRYPTO_NULL_CBC: 505 if (keylen == 0) 506 keylen = 64 * 8; 507 else { 508 if (keylen > 64 * 8) 509 keylen = 0; 510 } 511 return (keylen); 512 case CRYPTO_AES_CBC: 513 case CRYPTO_CAMELLIA_CBC: 514 switch (keylen) { 515 case 0: 516 return (128); 517 case 128: 518 case 192: 519 case 256: 520 return (keylen); 521 default: 522 return (0); 523 } 524 case CRYPTO_AES_XTS: 525 switch (keylen) { 526 case 0: 527 return (128); 528 case 128: 529 case 256: 530 return (keylen); 531 default: 532 return (0); 533 } 534 case CRYPTO_BLF_CBC: 535 if (keylen == 0) 536 return (128); 537 if (keylen < 128 || keylen > 448) 538 return (0); 539 if ((keylen % 32) != 0) 540 return (0); 541 return (keylen); 542 case CRYPTO_3DES_CBC: 543 if (keylen == 0 || keylen == 192) 544 return (192); 545 return (0); 546 default: 547 return (0); 548 } 549 } 550 551 static __inline u_int 552 g_eli_hashlen(u_int algo) 553 { 554 555 switch (algo) { 556 case CRYPTO_MD5_HMAC: 557 return (16); 558 case CRYPTO_SHA1_HMAC: 559 return (20); 560 case CRYPTO_RIPEMD160_HMAC: 561 return (20); 562 case CRYPTO_SHA2_256_HMAC: 563 return (32); 564 case CRYPTO_SHA2_384_HMAC: 565 return (48); 566 case CRYPTO_SHA2_512_HMAC: 567 return (64); 568 } 569 return (0); 570 } 571 572 #ifdef _KERNEL 573 int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 574 struct g_eli_metadata *md); 575 struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 576 struct g_provider *bpp, const struct g_eli_metadata *md, 577 const u_char *mkey, int nkey); 578 int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 579 580 int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 581 void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 582 583 void g_eli_read_done(struct bio *bp); 584 void g_eli_write_done(struct bio *bp); 585 int g_eli_crypto_rerun(struct cryptop *crp); 586 void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 587 size_t size); 588 589 void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker); 590 void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 591 592 void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 593 void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 594 #endif 595 596 void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 597 int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 598 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 599 int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 600 unsigned char *mkey); 601 #ifdef _KERNEL 602 void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 603 #endif 604 605 int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 606 const u_char *key, size_t keysize); 607 int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 608 const u_char *key, size_t keysize); 609 610 struct hmac_ctx { 611 SHA512_CTX shactx; 612 u_char k_opad[128]; 613 }; 614 615 void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 616 size_t hkeylen); 617 void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 618 size_t datasize); 619 void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 620 void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 621 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 622 623 #ifdef _KERNEL 624 void g_eli_key_init(struct g_eli_softc *sc); 625 void g_eli_key_destroy(struct g_eli_softc *sc); 626 uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize); 627 void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey); 628 #endif 629 #endif /* !_G_ELI_H_ */ 630