g_eli.h revision 286444
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 286444 2015-08-08 09:51:38Z 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 * 7 - Encryption keys are now generated from the Data Key and not from the 72 * IV Key (the G_ELI_FLAG_ENC_IVKEY flag will be set for older versions). 73 */ 74#define G_ELI_VERSION_00 0 75#define G_ELI_VERSION_01 1 76#define G_ELI_VERSION_02 2 77#define G_ELI_VERSION_03 3 78#define G_ELI_VERSION_04 4 79#define G_ELI_VERSION_05 5 80#define G_ELI_VERSION_06 6 81#define G_ELI_VERSION_07 7 82#define G_ELI_VERSION G_ELI_VERSION_07 83 84/* ON DISK FLAGS. */ 85/* Use random, onetime keys. */ 86#define G_ELI_FLAG_ONETIME 0x00000001 87/* Ask for the passphrase from the kernel, before mounting root. */ 88#define G_ELI_FLAG_BOOT 0x00000002 89/* Detach on last close, if we were open for writing. */ 90#define G_ELI_FLAG_WO_DETACH 0x00000004 91/* Detach on last close. */ 92#define G_ELI_FLAG_RW_DETACH 0x00000008 93/* Provide data authentication. */ 94#define G_ELI_FLAG_AUTH 0x00000010 95/* Provider is read-only, we should deny all write attempts. */ 96#define G_ELI_FLAG_RO 0x00000020 97/* Don't pass through BIO_DELETE requests. */ 98#define G_ELI_FLAG_NODELETE 0x00000040 99/* RUNTIME FLAGS. */ 100/* Provider was open for writing. */ 101#define G_ELI_FLAG_WOPEN 0x00010000 102/* Destroy device. */ 103#define G_ELI_FLAG_DESTROY 0x00020000 104/* Provider uses native byte-order for IV generation. */ 105#define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 106/* Provider uses single encryption key. */ 107#define G_ELI_FLAG_SINGLE_KEY 0x00080000 108/* Device suspended. */ 109#define G_ELI_FLAG_SUSPEND 0x00100000 110/* Provider uses first encryption key. */ 111#define G_ELI_FLAG_FIRST_KEY 0x00200000 112/* Provider uses IV-Key for encryption key generation. */ 113#define G_ELI_FLAG_ENC_IVKEY 0x00400000 114 115#define G_ELI_NEW_BIO 255 116 117#define SHA512_MDLEN 64 118#define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 119 120#define G_ELI_MAXMKEYS 2 121#define G_ELI_MAXKEYLEN 64 122#define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 123#define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 124#define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 125#define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 126#define G_ELI_SALTLEN 64 127#define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 128/* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 129#define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 130#define G_ELI_OVERWRITES 5 131/* Switch data encryption key every 2^20 blocks. */ 132#define G_ELI_KEY_SHIFT 20 133 134#ifdef _KERNEL 135extern int g_eli_debug; 136extern u_int g_eli_overwrites; 137extern u_int g_eli_batch; 138 139#define G_ELI_CRYPTO_UNKNOWN 0 140#define G_ELI_CRYPTO_HW 1 141#define G_ELI_CRYPTO_SW 2 142 143#define G_ELI_DEBUG(lvl, ...) do { \ 144 if (g_eli_debug >= (lvl)) { \ 145 printf("GEOM_ELI"); \ 146 if (g_eli_debug > 0) \ 147 printf("[%u]", lvl); \ 148 printf(": "); \ 149 printf(__VA_ARGS__); \ 150 printf("\n"); \ 151 } \ 152} while (0) 153#define G_ELI_LOGREQ(lvl, bp, ...) do { \ 154 if (g_eli_debug >= (lvl)) { \ 155 printf("GEOM_ELI"); \ 156 if (g_eli_debug > 0) \ 157 printf("[%u]", lvl); \ 158 printf(": "); \ 159 printf(__VA_ARGS__); \ 160 printf(" "); \ 161 g_print_bio(bp); \ 162 printf("\n"); \ 163 } \ 164} while (0) 165 166struct g_eli_worker { 167 struct g_eli_softc *w_softc; 168 struct proc *w_proc; 169 u_int w_number; 170 uint64_t w_sid; 171 boolean_t w_active; 172 LIST_ENTRY(g_eli_worker) w_next; 173}; 174 175struct g_eli_softc { 176 struct g_geom *sc_geom; 177 u_int sc_version; 178 u_int sc_crypto; 179 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 180 uint8_t sc_ekey[G_ELI_DATAKEYLEN]; 181 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue; 182 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree; 183 struct mtx sc_ekeys_lock; 184 uint64_t sc_ekeys_total; 185 uint64_t sc_ekeys_allocated; 186 u_int sc_ealgo; 187 u_int sc_ekeylen; 188 uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 189 u_int sc_aalgo; 190 u_int sc_akeylen; 191 u_int sc_alen; 192 SHA256_CTX sc_akeyctx; 193 uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 194 SHA256_CTX sc_ivctx; 195 int sc_nkey; 196 uint32_t sc_flags; 197 int sc_inflight; 198 off_t sc_mediasize; 199 size_t sc_sectorsize; 200 u_int sc_bytes_per_sector; 201 u_int sc_data_per_sector; 202 boolean_t sc_cpubind; 203 204 /* Only for software cryptography. */ 205 struct bio_queue_head sc_queue; 206 struct mtx sc_queue_mtx; 207 LIST_HEAD(, g_eli_worker) sc_workers; 208}; 209#define sc_name sc_geom->name 210#endif /* _KERNEL */ 211 212struct g_eli_metadata { 213 char md_magic[16]; /* Magic value. */ 214 uint32_t md_version; /* Version number. */ 215 uint32_t md_flags; /* Additional flags. */ 216 uint16_t md_ealgo; /* Encryption algorithm. */ 217 uint16_t md_keylen; /* Key length. */ 218 uint16_t md_aalgo; /* Authentication algorithm. */ 219 uint64_t md_provsize; /* Provider's size. */ 220 uint32_t md_sectorsize; /* Sector size. */ 221 uint8_t md_keys; /* Available keys. */ 222 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 223 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 224 /* Encrypted master key (IV-key, Data-key, HMAC). */ 225 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 226 u_char md_hash[16]; /* MD5 hash. */ 227} __packed; 228#ifndef _OpenSSL_ 229static __inline void 230eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap) 231{ 232 u_char *p; 233 234 p = *datap; 235 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 236 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 237 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 238 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 239 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 240 *p = md->md_keys; p += sizeof(md->md_keys); 241 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 242 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 243 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 244 *datap = p; 245} 246static __inline void 247eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata *md, u_char **datap) 248{ 249 u_char *p; 250 251 p = *datap; 252 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 253 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 254 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 255 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 256 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 257 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 258 *p = md->md_keys; p += sizeof(md->md_keys); 259 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 260 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 261 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 262 *datap = p; 263} 264static __inline void 265eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 266{ 267 MD5_CTX ctx; 268 u_char *p; 269 270 p = data; 271 bcopy(md->md_magic, p, sizeof(md->md_magic)); 272 p += sizeof(md->md_magic); 273 le32enc(p, md->md_version); 274 p += sizeof(md->md_version); 275 switch (md->md_version) { 276 case G_ELI_VERSION_00: 277 eli_metadata_encode_v0(md, &p); 278 break; 279 case G_ELI_VERSION_01: 280 case G_ELI_VERSION_02: 281 case G_ELI_VERSION_03: 282 case G_ELI_VERSION_04: 283 case G_ELI_VERSION_05: 284 case G_ELI_VERSION_06: 285 case G_ELI_VERSION_07: 286 eli_metadata_encode_v1v2v3v4v5v6v7(md, &p); 287 break; 288 default: 289#ifdef _KERNEL 290 panic("%s: Unsupported version %u.", __func__, 291 (u_int)md->md_version); 292#else 293 assert(!"Unsupported metadata version."); 294#endif 295 } 296 MD5Init(&ctx); 297 MD5Update(&ctx, data, p - data); 298 MD5Final(md->md_hash, &ctx); 299 bcopy(md->md_hash, p, sizeof(md->md_hash)); 300} 301static __inline int 302eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 303{ 304 MD5_CTX ctx; 305 const u_char *p; 306 307 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 308 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 309 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 310 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 311 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 312 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 313 md->md_keys = *p; p += sizeof(md->md_keys); 314 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 315 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 316 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 317 MD5Init(&ctx); 318 MD5Update(&ctx, data, p - data); 319 MD5Final(md->md_hash, &ctx); 320 if (bcmp(md->md_hash, p, 16) != 0) 321 return (EINVAL); 322 return (0); 323} 324 325static __inline int 326eli_metadata_decode_v1v2v3v4v5v6v7(const u_char *data, struct g_eli_metadata *md) 327{ 328 MD5_CTX ctx; 329 const u_char *p; 330 331 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 332 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 333 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 334 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 335 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 336 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 337 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 338 md->md_keys = *p; p += sizeof(md->md_keys); 339 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 340 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 341 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 342 MD5Init(&ctx); 343 MD5Update(&ctx, data, p - data); 344 MD5Final(md->md_hash, &ctx); 345 if (bcmp(md->md_hash, p, 16) != 0) 346 return (EINVAL); 347 return (0); 348} 349static __inline int 350eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 351{ 352 int error; 353 354 bcopy(data, md->md_magic, sizeof(md->md_magic)); 355 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0) 356 return (EINVAL); 357 md->md_version = le32dec(data + sizeof(md->md_magic)); 358 switch (md->md_version) { 359 case G_ELI_VERSION_00: 360 error = eli_metadata_decode_v0(data, md); 361 break; 362 case G_ELI_VERSION_01: 363 case G_ELI_VERSION_02: 364 case G_ELI_VERSION_03: 365 case G_ELI_VERSION_04: 366 case G_ELI_VERSION_05: 367 case G_ELI_VERSION_06: 368 case G_ELI_VERSION_07: 369 error = eli_metadata_decode_v1v2v3v4v5v6v7(data, md); 370 break; 371 default: 372 error = EOPNOTSUPP; 373 break; 374 } 375 return (error); 376} 377#endif /* !_OpenSSL */ 378 379static __inline u_int 380g_eli_str2ealgo(const char *name) 381{ 382 383 if (strcasecmp("null", name) == 0) 384 return (CRYPTO_NULL_CBC); 385 else if (strcasecmp("null-cbc", name) == 0) 386 return (CRYPTO_NULL_CBC); 387 else if (strcasecmp("aes", name) == 0) 388 return (CRYPTO_AES_XTS); 389 else if (strcasecmp("aes-cbc", name) == 0) 390 return (CRYPTO_AES_CBC); 391 else if (strcasecmp("aes-xts", name) == 0) 392 return (CRYPTO_AES_XTS); 393 else if (strcasecmp("blowfish", name) == 0) 394 return (CRYPTO_BLF_CBC); 395 else if (strcasecmp("blowfish-cbc", name) == 0) 396 return (CRYPTO_BLF_CBC); 397 else if (strcasecmp("camellia", name) == 0) 398 return (CRYPTO_CAMELLIA_CBC); 399 else if (strcasecmp("camellia-cbc", name) == 0) 400 return (CRYPTO_CAMELLIA_CBC); 401 else if (strcasecmp("3des", name) == 0) 402 return (CRYPTO_3DES_CBC); 403 else if (strcasecmp("3des-cbc", name) == 0) 404 return (CRYPTO_3DES_CBC); 405 return (CRYPTO_ALGORITHM_MIN - 1); 406} 407 408static __inline u_int 409g_eli_str2aalgo(const char *name) 410{ 411 412 if (strcasecmp("hmac/md5", name) == 0) 413 return (CRYPTO_MD5_HMAC); 414 else if (strcasecmp("hmac/sha1", name) == 0) 415 return (CRYPTO_SHA1_HMAC); 416 else if (strcasecmp("hmac/ripemd160", name) == 0) 417 return (CRYPTO_RIPEMD160_HMAC); 418 else if (strcasecmp("hmac/sha256", name) == 0) 419 return (CRYPTO_SHA2_256_HMAC); 420 else if (strcasecmp("hmac/sha384", name) == 0) 421 return (CRYPTO_SHA2_384_HMAC); 422 else if (strcasecmp("hmac/sha512", name) == 0) 423 return (CRYPTO_SHA2_512_HMAC); 424 return (CRYPTO_ALGORITHM_MIN - 1); 425} 426 427static __inline const char * 428g_eli_algo2str(u_int algo) 429{ 430 431 switch (algo) { 432 case CRYPTO_NULL_CBC: 433 return ("NULL"); 434 case CRYPTO_AES_CBC: 435 return ("AES-CBC"); 436 case CRYPTO_AES_XTS: 437 return ("AES-XTS"); 438 case CRYPTO_BLF_CBC: 439 return ("Blowfish-CBC"); 440 case CRYPTO_CAMELLIA_CBC: 441 return ("CAMELLIA-CBC"); 442 case CRYPTO_3DES_CBC: 443 return ("3DES-CBC"); 444 case CRYPTO_MD5_HMAC: 445 return ("HMAC/MD5"); 446 case CRYPTO_SHA1_HMAC: 447 return ("HMAC/SHA1"); 448 case CRYPTO_RIPEMD160_HMAC: 449 return ("HMAC/RIPEMD160"); 450 case CRYPTO_SHA2_256_HMAC: 451 return ("HMAC/SHA256"); 452 case CRYPTO_SHA2_384_HMAC: 453 return ("HMAC/SHA384"); 454 case CRYPTO_SHA2_512_HMAC: 455 return ("HMAC/SHA512"); 456 } 457 return ("unknown"); 458} 459 460static __inline void 461eli_metadata_dump(const struct g_eli_metadata *md) 462{ 463 static const char hex[] = "0123456789abcdef"; 464 char str[sizeof(md->md_mkeys) * 2 + 1]; 465 u_int i; 466 467 printf(" magic: %s\n", md->md_magic); 468 printf(" version: %u\n", (u_int)md->md_version); 469 printf(" flags: 0x%x\n", (u_int)md->md_flags); 470 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 471 printf(" keylen: %u\n", (u_int)md->md_keylen); 472 if (md->md_flags & G_ELI_FLAG_AUTH) 473 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 474 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 475 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 476 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 477 printf("iterations: %u\n", (u_int)md->md_iterations); 478 bzero(str, sizeof(str)); 479 for (i = 0; i < sizeof(md->md_salt); i++) { 480 str[i * 2] = hex[md->md_salt[i] >> 4]; 481 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 482 } 483 printf(" Salt: %s\n", str); 484 bzero(str, sizeof(str)); 485 for (i = 0; i < sizeof(md->md_mkeys); i++) { 486 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 487 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 488 } 489 printf("Master Key: %s\n", str); 490 bzero(str, sizeof(str)); 491 for (i = 0; i < 16; i++) { 492 str[i * 2] = hex[md->md_hash[i] >> 4]; 493 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 494 } 495 printf(" MD5 hash: %s\n", str); 496} 497 498static __inline u_int 499g_eli_keylen(u_int algo, u_int keylen) 500{ 501 502 switch (algo) { 503 case CRYPTO_NULL_CBC: 504 if (keylen == 0) 505 keylen = 64 * 8; 506 else { 507 if (keylen > 64 * 8) 508 keylen = 0; 509 } 510 return (keylen); 511 case CRYPTO_AES_CBC: 512 case CRYPTO_CAMELLIA_CBC: 513 switch (keylen) { 514 case 0: 515 return (128); 516 case 128: 517 case 192: 518 case 256: 519 return (keylen); 520 default: 521 return (0); 522 } 523 case CRYPTO_AES_XTS: 524 switch (keylen) { 525 case 0: 526 return (128); 527 case 128: 528 case 256: 529 return (keylen); 530 default: 531 return (0); 532 } 533 case CRYPTO_BLF_CBC: 534 if (keylen == 0) 535 return (128); 536 if (keylen < 128 || keylen > 448) 537 return (0); 538 if ((keylen % 32) != 0) 539 return (0); 540 return (keylen); 541 case CRYPTO_3DES_CBC: 542 if (keylen == 0 || keylen == 192) 543 return (192); 544 return (0); 545 default: 546 return (0); 547 } 548} 549 550static __inline u_int 551g_eli_hashlen(u_int algo) 552{ 553 554 switch (algo) { 555 case CRYPTO_MD5_HMAC: 556 return (16); 557 case CRYPTO_SHA1_HMAC: 558 return (20); 559 case CRYPTO_RIPEMD160_HMAC: 560 return (20); 561 case CRYPTO_SHA2_256_HMAC: 562 return (32); 563 case CRYPTO_SHA2_384_HMAC: 564 return (48); 565 case CRYPTO_SHA2_512_HMAC: 566 return (64); 567 } 568 return (0); 569} 570 571#ifdef _KERNEL 572int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 573 struct g_eli_metadata *md); 574struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 575 struct g_provider *bpp, const struct g_eli_metadata *md, 576 const u_char *mkey, int nkey); 577int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 578 579int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 580void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 581 582void g_eli_read_done(struct bio *bp); 583void g_eli_write_done(struct bio *bp); 584int g_eli_crypto_rerun(struct cryptop *crp); 585void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 586 size_t size); 587 588void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker); 589void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 590 591void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 592void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 593#endif 594 595void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 596int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 597 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 598int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 599 unsigned char *mkey); 600#ifdef _KERNEL 601void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 602#endif 603 604int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 605 const u_char *key, size_t keysize); 606int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 607 const u_char *key, size_t keysize); 608 609struct hmac_ctx { 610 SHA512_CTX shactx; 611 u_char k_opad[128]; 612}; 613 614void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 615 size_t hkeylen); 616void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 617 size_t datasize); 618void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 619void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 620 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 621 622#ifdef _KERNEL 623void g_eli_key_init(struct g_eli_softc *sc); 624void g_eli_key_destroy(struct g_eli_softc *sc); 625uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize); 626void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey); 627#endif 628#endif /* !_G_ELI_H_ */ 629