g_eli.h revision 213165
190792Sgshapiro/*- 2261194Sgshapiro * Copyright (c) 2005-2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 390792Sgshapiro * All rights reserved. 490792Sgshapiro * 590792Sgshapiro * Redistribution and use in source and binary forms, with or without 690792Sgshapiro * modification, are permitted provided that the following conditions 790792Sgshapiro * are met: 890792Sgshapiro * 1. Redistributions of source code must retain the above copyright 9261194Sgshapiro * notice, this list of conditions and the following disclaimer. 1090792Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 1190792Sgshapiro * notice, this list of conditions and the following disclaimer in the 1290792Sgshapiro * documentation and/or other materials provided with the distribution. 1390792Sgshapiro * 1490792Sgshapiro * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 1590792Sgshapiro * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1690792Sgshapiro * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1790792Sgshapiro * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 1890792Sgshapiro * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1990792Sgshapiro * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2090792Sgshapiro * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2190792Sgshapiro * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2290792Sgshapiro * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2390792Sgshapiro * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2490792Sgshapiro * SUCH DAMAGE. 2590792Sgshapiro * 2690792Sgshapiro * $FreeBSD: head/sys/geom/eli/g_eli.h 213165 2010-09-25 10:32:04Z pjd $ 2790792Sgshapiro */ 2890792Sgshapiro 2990792Sgshapiro#ifndef _G_ELI_H_ 3090792Sgshapiro#define _G_ELI_H_ 3190792Sgshapiro 3290792Sgshapiro#include <sys/endian.h> 3390792Sgshapiro#include <sys/errno.h> 3490792Sgshapiro#include <sys/malloc.h> 3590792Sgshapiro#include <crypto/sha2/sha2.h> 3690792Sgshapiro#include <opencrypto/cryptodev.h> 3790792Sgshapiro#ifdef _KERNEL 3890792Sgshapiro#include <sys/bio.h> 3990792Sgshapiro#include <sys/libkern.h> 4090792Sgshapiro#include <geom/geom.h> 4190792Sgshapiro#else 4290792Sgshapiro#include <stdio.h> 4390792Sgshapiro#include <string.h> 4490792Sgshapiro#include <strings.h> 4590792Sgshapiro#endif 4690792Sgshapiro#ifndef _OpenSSL_ 4790792Sgshapiro#include <sys/md5.h> 4890792Sgshapiro#endif 4990792Sgshapiro 5090792Sgshapiro#define G_ELI_CLASS_NAME "ELI" 5190792Sgshapiro#define G_ELI_MAGIC "GEOM::ELI" 5290792Sgshapiro#define G_ELI_SUFFIX ".eli" 5390792Sgshapiro 5490792Sgshapiro/* 5590792Sgshapiro * Version history: 5690792Sgshapiro * 0 - Initial version number. 5790792Sgshapiro * 1 - Added data authentication support (md_aalgo field and 5890792Sgshapiro * G_ELI_FLAG_AUTH flag). 5990792Sgshapiro * 2 - Added G_ELI_FLAG_READONLY. 6090792Sgshapiro * 3 - Added 'configure' subcommand. 6190792Sgshapiro * 4 - IV is generated from offset converted to little-endian 6290792Sgshapiro * (flag G_ELI_FLAG_NATIVE_BYTE_ORDER will be set for older versions). 6390792Sgshapiro * 5 - Added multiple encrypton keys and AES-XTS support. 6490792Sgshapiro */ 6590792Sgshapiro#define G_ELI_VERSION 5 6690792Sgshapiro 6790792Sgshapiro/* ON DISK FLAGS. */ 6890792Sgshapiro/* Use random, onetime keys. */ 6990792Sgshapiro#define G_ELI_FLAG_ONETIME 0x00000001 7090792Sgshapiro/* Ask for the passphrase from the kernel, before mounting root. */ 7190792Sgshapiro#define G_ELI_FLAG_BOOT 0x00000002 7290792Sgshapiro/* Detach on last close, if we were open for writing. */ 7390792Sgshapiro#define G_ELI_FLAG_WO_DETACH 0x00000004 7490792Sgshapiro/* Detach on last close. */ 7590792Sgshapiro#define G_ELI_FLAG_RW_DETACH 0x00000008 7690792Sgshapiro/* Provide data authentication. */ 7790792Sgshapiro#define G_ELI_FLAG_AUTH 0x00000010 7890792Sgshapiro/* Provider is read-only, we should deny all write attempts. */ 7990792Sgshapiro#define G_ELI_FLAG_RO 0x00000020 8090792Sgshapiro/* RUNTIME FLAGS. */ 8190792Sgshapiro/* Provider was open for writing. */ 8290792Sgshapiro#define G_ELI_FLAG_WOPEN 0x00010000 8390792Sgshapiro/* Destroy device. */ 8490792Sgshapiro#define G_ELI_FLAG_DESTROY 0x00020000 8590792Sgshapiro/* Provider uses native byte-order for IV generation. */ 8690792Sgshapiro#define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 8790792Sgshapiro/* Provider uses single encryption key. */ 8890792Sgshapiro#define G_ELI_FLAG_SINGLE_KEY 0x00080000 8990792Sgshapiro 9090792Sgshapiro#define SHA512_MDLEN 64 9190792Sgshapiro#define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 9290792Sgshapiro 9390792Sgshapiro#define G_ELI_MAXMKEYS 2 9490792Sgshapiro#define G_ELI_MAXKEYLEN 64 9590792Sgshapiro#define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 9690792Sgshapiro#define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 9790792Sgshapiro#define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 9890792Sgshapiro#define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 9990792Sgshapiro#define G_ELI_SALTLEN 64 10090792Sgshapiro#define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 10190792Sgshapiro/* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 10290792Sgshapiro#define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 10390792Sgshapiro#define G_ELI_OVERWRITES 5 10490792Sgshapiro/* Switch data encryption key every 2^20 blocks. */ 10590792Sgshapiro#define G_ELI_KEY_SHIFT 20 10690792Sgshapiro 10790792Sgshapiro#ifdef _KERNEL 10890792Sgshapiroextern int g_eli_debug; 10990792Sgshapiroextern u_int g_eli_overwrites; 11090792Sgshapiroextern u_int g_eli_batch; 11190792Sgshapiro 11290792Sgshapiro#define G_ELI_CRYPTO_HW 1 11390792Sgshapiro#define G_ELI_CRYPTO_SW 2 11490792Sgshapiro 11590792Sgshapiro#define G_ELI_DEBUG(lvl, ...) do { \ 11690792Sgshapiro if (g_eli_debug >= (lvl)) { \ 11790792Sgshapiro printf("GEOM_ELI"); \ 11890792Sgshapiro if (g_eli_debug > 0) \ 11990792Sgshapiro printf("[%u]", lvl); \ 12090792Sgshapiro printf(": "); \ 12190792Sgshapiro printf(__VA_ARGS__); \ 12290792Sgshapiro printf("\n"); \ 12390792Sgshapiro } \ 12490792Sgshapiro} while (0) 12590792Sgshapiro#define G_ELI_LOGREQ(lvl, bp, ...) do { \ 12690792Sgshapiro if (g_eli_debug >= (lvl)) { \ 12790792Sgshapiro printf("GEOM_ELI"); \ 12890792Sgshapiro if (g_eli_debug > 0) \ 12990792Sgshapiro printf("[%u]", lvl); \ 13090792Sgshapiro printf(": "); \ 13190792Sgshapiro printf(__VA_ARGS__); \ 13290792Sgshapiro printf(" "); \ 13390792Sgshapiro g_print_bio(bp); \ 13490792Sgshapiro printf("\n"); \ 13590792Sgshapiro } \ 13690792Sgshapiro} while (0) 13790792Sgshapiro 13890792Sgshapirostruct g_eli_worker { 13990792Sgshapiro struct g_eli_softc *w_softc; 14090792Sgshapiro struct proc *w_proc; 14190792Sgshapiro u_int w_number; 14290792Sgshapiro uint64_t w_sid; 14390792Sgshapiro LIST_ENTRY(g_eli_worker) w_next; 14490792Sgshapiro}; 14590792Sgshapiro 14690792Sgshapirostruct g_eli_softc { 14790792Sgshapiro struct g_geom *sc_geom; 14890792Sgshapiro u_int sc_crypto; 14990792Sgshapiro uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 15090792Sgshapiro uint8_t **sc_ekeys; 15190792Sgshapiro u_int sc_nekeys; 15290792Sgshapiro u_int sc_ealgo; 15390792Sgshapiro u_int sc_ekeylen; 15490792Sgshapiro uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 15590792Sgshapiro u_int sc_aalgo; 15690792Sgshapiro u_int sc_akeylen; 15790792Sgshapiro u_int sc_alen; 15890792Sgshapiro SHA256_CTX sc_akeyctx; 15990792Sgshapiro uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 16090792Sgshapiro SHA256_CTX sc_ivctx; 16190792Sgshapiro int sc_nkey; 16290792Sgshapiro uint32_t sc_flags; 16390792Sgshapiro off_t sc_mediasize; 16490792Sgshapiro size_t sc_sectorsize; 16590792Sgshapiro u_int sc_bytes_per_sector; 16690792Sgshapiro u_int sc_data_per_sector; 16790792Sgshapiro 16890792Sgshapiro /* Only for software cryptography. */ 16990792Sgshapiro struct bio_queue_head sc_queue; 17090792Sgshapiro struct mtx sc_queue_mtx; 17190792Sgshapiro LIST_HEAD(, g_eli_worker) sc_workers; 17290792Sgshapiro}; 17390792Sgshapiro#define sc_name sc_geom->name 17490792Sgshapiro#endif /* _KERNEL */ 17590792Sgshapiro 17690792Sgshapirostruct g_eli_metadata { 17790792Sgshapiro char md_magic[16]; /* Magic value. */ 17890792Sgshapiro uint32_t md_version; /* Version number. */ 17990792Sgshapiro uint32_t md_flags; /* Additional flags. */ 18090792Sgshapiro uint16_t md_ealgo; /* Encryption algorithm. */ 18190792Sgshapiro uint16_t md_keylen; /* Key length. */ 18290792Sgshapiro uint16_t md_aalgo; /* Authentication algorithm. */ 18390792Sgshapiro uint64_t md_provsize; /* Provider's size. */ 18490792Sgshapiro uint32_t md_sectorsize; /* Sector size. */ 18590792Sgshapiro uint8_t md_keys; /* Available keys. */ 18690792Sgshapiro int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 187 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 188 /* Encrypted master key (IV-key, Data-key, HMAC). */ 189 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 190 u_char md_hash[16]; /* MD5 hash. */ 191} __packed; 192#ifndef _OpenSSL_ 193static __inline void 194eli_metadata_encode(struct g_eli_metadata *md, u_char *data) 195{ 196 MD5_CTX ctx; 197 u_char *p; 198 199 p = data; 200 bcopy(md->md_magic, p, sizeof(md->md_magic)); p += sizeof(md->md_magic); 201 le32enc(p, md->md_version); p += sizeof(md->md_version); 202 le32enc(p, md->md_flags); p += sizeof(md->md_flags); 203 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 204 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 205 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 206 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 207 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 208 *p = md->md_keys; p += sizeof(md->md_keys); 209 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 210 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 211 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 212 MD5Init(&ctx); 213 MD5Update(&ctx, data, p - data); 214 MD5Final(md->md_hash, &ctx); 215 bcopy(md->md_hash, p, sizeof(md->md_hash)); 216} 217static __inline int 218eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 219{ 220 MD5_CTX ctx; 221 const u_char *p; 222 223 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 224 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 225 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 226 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 227 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 228 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 229 md->md_keys = *p; p += sizeof(md->md_keys); 230 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 231 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 232 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 233 MD5Init(&ctx); 234 MD5Update(&ctx, data, p - data); 235 MD5Final(md->md_hash, &ctx); 236 if (bcmp(md->md_hash, p, 16) != 0) 237 return (EINVAL); 238 return (0); 239} 240 241static __inline int 242eli_metadata_decode_v1v2v3v4v5(const u_char *data, struct g_eli_metadata *md) 243{ 244 MD5_CTX ctx; 245 const u_char *p; 246 247 p = data + sizeof(md->md_magic) + sizeof(md->md_version); 248 md->md_flags = le32dec(p); p += sizeof(md->md_flags); 249 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 250 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 251 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 252 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 253 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 254 md->md_keys = *p; p += sizeof(md->md_keys); 255 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 256 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 257 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 258 MD5Init(&ctx); 259 MD5Update(&ctx, data, p - data); 260 MD5Final(md->md_hash, &ctx); 261 if (bcmp(md->md_hash, p, 16) != 0) 262 return (EINVAL); 263 return (0); 264} 265static __inline int 266eli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 267{ 268 int error; 269 270 bcopy(data, md->md_magic, sizeof(md->md_magic)); 271 md->md_version = le32dec(data + sizeof(md->md_magic)); 272 switch (md->md_version) { 273 case 0: 274 error = eli_metadata_decode_v0(data, md); 275 break; 276 case 1: 277 case 2: 278 case 3: 279 case 4: 280 case 5: 281 error = eli_metadata_decode_v1v2v3v4v5(data, md); 282 break; 283 default: 284 error = EINVAL; 285 break; 286 } 287 return (error); 288} 289#endif /* !_OpenSSL */ 290 291static __inline u_int 292g_eli_str2ealgo(const char *name) 293{ 294 295 if (strcasecmp("null", name) == 0) 296 return (CRYPTO_NULL_CBC); 297 else if (strcasecmp("null-cbc", name) == 0) 298 return (CRYPTO_NULL_CBC); 299 else if (strcasecmp("aes", name) == 0) 300 return (CRYPTO_AES_XTS); 301 else if (strcasecmp("aes-cbc", name) == 0) 302 return (CRYPTO_AES_CBC); 303 else if (strcasecmp("aes-xts", name) == 0) 304 return (CRYPTO_AES_XTS); 305 else if (strcasecmp("blowfish", name) == 0) 306 return (CRYPTO_BLF_CBC); 307 else if (strcasecmp("blowfish-cbc", name) == 0) 308 return (CRYPTO_BLF_CBC); 309 else if (strcasecmp("camellia", name) == 0) 310 return (CRYPTO_CAMELLIA_CBC); 311 else if (strcasecmp("camellia-cbc", name) == 0) 312 return (CRYPTO_CAMELLIA_CBC); 313 else if (strcasecmp("3des", name) == 0) 314 return (CRYPTO_3DES_CBC); 315 else if (strcasecmp("3des-cbc", name) == 0) 316 return (CRYPTO_3DES_CBC); 317 return (CRYPTO_ALGORITHM_MIN - 1); 318} 319 320static __inline u_int 321g_eli_str2aalgo(const char *name) 322{ 323 324 if (strcasecmp("hmac/md5", name) == 0) 325 return (CRYPTO_MD5_HMAC); 326 else if (strcasecmp("hmac/sha1", name) == 0) 327 return (CRYPTO_SHA1_HMAC); 328 else if (strcasecmp("hmac/ripemd160", name) == 0) 329 return (CRYPTO_RIPEMD160_HMAC); 330 else if (strcasecmp("hmac/sha256", name) == 0) 331 return (CRYPTO_SHA2_256_HMAC); 332 else if (strcasecmp("hmac/sha384", name) == 0) 333 return (CRYPTO_SHA2_384_HMAC); 334 else if (strcasecmp("hmac/sha512", name) == 0) 335 return (CRYPTO_SHA2_512_HMAC); 336 return (CRYPTO_ALGORITHM_MIN - 1); 337} 338 339static __inline const char * 340g_eli_algo2str(u_int algo) 341{ 342 343 switch (algo) { 344 case CRYPTO_NULL_CBC: 345 return ("NULL"); 346 case CRYPTO_AES_CBC: 347 return ("AES-CBC"); 348 case CRYPTO_AES_XTS: 349 return ("AES-XTS"); 350 case CRYPTO_BLF_CBC: 351 return ("Blowfish-CBC"); 352 case CRYPTO_CAMELLIA_CBC: 353 return ("CAMELLIA-CBC"); 354 case CRYPTO_3DES_CBC: 355 return ("3DES-CBC"); 356 case CRYPTO_MD5_HMAC: 357 return ("HMAC/MD5"); 358 case CRYPTO_SHA1_HMAC: 359 return ("HMAC/SHA1"); 360 case CRYPTO_RIPEMD160_HMAC: 361 return ("HMAC/RIPEMD160"); 362 case CRYPTO_SHA2_256_HMAC: 363 return ("HMAC/SHA256"); 364 case CRYPTO_SHA2_384_HMAC: 365 return ("HMAC/SHA384"); 366 case CRYPTO_SHA2_512_HMAC: 367 return ("HMAC/SHA512"); 368 } 369 return ("unknown"); 370} 371 372static __inline void 373eli_metadata_dump(const struct g_eli_metadata *md) 374{ 375 static const char hex[] = "0123456789abcdef"; 376 char str[sizeof(md->md_mkeys) * 2 + 1]; 377 u_int i; 378 379 printf(" magic: %s\n", md->md_magic); 380 printf(" version: %u\n", (u_int)md->md_version); 381 printf(" flags: 0x%x\n", (u_int)md->md_flags); 382 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 383 printf(" keylen: %u\n", (u_int)md->md_keylen); 384 if (md->md_flags & G_ELI_FLAG_AUTH) 385 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 386 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 387 printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 388 printf(" keys: 0x%02x\n", (u_int)md->md_keys); 389 printf("iterations: %u\n", (u_int)md->md_iterations); 390 bzero(str, sizeof(str)); 391 for (i = 0; i < sizeof(md->md_salt); i++) { 392 str[i * 2] = hex[md->md_salt[i] >> 4]; 393 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 394 } 395 printf(" Salt: %s\n", str); 396 bzero(str, sizeof(str)); 397 for (i = 0; i < sizeof(md->md_mkeys); i++) { 398 str[i * 2] = hex[md->md_mkeys[i] >> 4]; 399 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 400 } 401 printf("Master Key: %s\n", str); 402 bzero(str, sizeof(str)); 403 for (i = 0; i < 16; i++) { 404 str[i * 2] = hex[md->md_hash[i] >> 4]; 405 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 406 } 407 printf(" MD5 hash: %s\n", str); 408} 409 410static __inline u_int 411g_eli_keylen(u_int algo, u_int keylen) 412{ 413 414 switch (algo) { 415 case CRYPTO_NULL_CBC: 416 if (keylen == 0) 417 keylen = 64 * 8; 418 else { 419 if (keylen > 64 * 8) 420 keylen = 0; 421 } 422 return (keylen); 423 case CRYPTO_AES_CBC: 424 case CRYPTO_CAMELLIA_CBC: 425 switch (keylen) { 426 case 0: 427 return (128); 428 case 128: 429 case 192: 430 case 256: 431 return (keylen); 432 default: 433 return (0); 434 } 435 case CRYPTO_AES_XTS: 436 switch (keylen) { 437 case 0: 438 return (128); 439 case 128: 440 case 256: 441 return (keylen); 442 default: 443 return (0); 444 } 445 case CRYPTO_BLF_CBC: 446 if (keylen == 0) 447 return (128); 448 if (keylen < 128 || keylen > 448) 449 return (0); 450 if ((keylen % 32) != 0) 451 return (0); 452 return (keylen); 453 case CRYPTO_3DES_CBC: 454 if (keylen == 0 || keylen == 192) 455 return (192); 456 return (0); 457 default: 458 return (0); 459 } 460} 461 462static __inline u_int 463g_eli_hashlen(u_int algo) 464{ 465 466 switch (algo) { 467 case CRYPTO_MD5_HMAC: 468 return (16); 469 case CRYPTO_SHA1_HMAC: 470 return (20); 471 case CRYPTO_RIPEMD160_HMAC: 472 return (20); 473 case CRYPTO_SHA2_256_HMAC: 474 return (32); 475 case CRYPTO_SHA2_384_HMAC: 476 return (48); 477 case CRYPTO_SHA2_512_HMAC: 478 return (64); 479 } 480 return (0); 481} 482 483#ifdef _KERNEL 484int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 485 struct g_eli_metadata *md); 486struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 487 struct g_provider *bpp, const struct g_eli_metadata *md, 488 const u_char *mkey, int nkey); 489int g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 490 491int g_eli_access(struct g_provider *pp, int dr, int dw, int de); 492void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 493 494void g_eli_read_done(struct bio *bp); 495void g_eli_write_done(struct bio *bp); 496int g_eli_crypto_rerun(struct cryptop *crp); 497uint8_t *g_eli_crypto_key(struct g_eli_softc *sc, off_t offset, 498 size_t blocksize); 499void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 500 size_t size); 501 502void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 503 504void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 505void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 506#endif 507 508void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 509int g_eli_mkey_decrypt(const struct g_eli_metadata *md, 510 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 511int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 512 unsigned char *mkey); 513#ifdef _KERNEL 514void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 515#endif 516 517int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 518 const u_char *key, size_t keysize); 519int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 520 const u_char *key, size_t keysize); 521 522struct hmac_ctx { 523 SHA512_CTX shactx; 524 u_char k_opad[128]; 525}; 526 527void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 528 size_t hkeylen); 529void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 530 size_t datasize); 531void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 532void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 533 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 534#endif /* !_G_ELI_H_ */ 535