g_eli.h revision 213067
1148456Spjd/*- 2161220Spjd * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3148456Spjd * All rights reserved. 4148456Spjd * 5148456Spjd * Redistribution and use in source and binary forms, with or without 6148456Spjd * modification, are permitted provided that the following conditions 7148456Spjd * are met: 8148456Spjd * 1. Redistributions of source code must retain the above copyright 9148456Spjd * notice, this list of conditions and the following disclaimer. 10148456Spjd * 2. Redistributions in binary form must reproduce the above copyright 11148456Spjd * notice, this list of conditions and the following disclaimer in the 12148456Spjd * documentation and/or other materials provided with the distribution. 13155174Spjd * 14148456Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15148456Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16148456Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17148456Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18148456Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19148456Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20148456Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21148456Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22148456Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23148456Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24148456Spjd * SUCH DAMAGE. 25148456Spjd * 26148456Spjd * $FreeBSD: head/sys/geom/eli/g_eli.h 213067 2010-09-23 11:49:47Z pjd $ 27148456Spjd */ 28148456Spjd 29148456Spjd#ifndef _G_ELI_H_ 30148456Spjd#define _G_ELI_H_ 31148456Spjd 32148456Spjd#include <sys/endian.h> 33148456Spjd#include <sys/errno.h> 34148456Spjd#include <sys/malloc.h> 35148456Spjd#include <crypto/sha2/sha2.h> 36148456Spjd#include <opencrypto/cryptodev.h> 37148456Spjd#ifdef _KERNEL 38148456Spjd#include <sys/bio.h> 39148456Spjd#include <sys/libkern.h> 40148456Spjd#include <geom/geom.h> 41148456Spjd#else 42148456Spjd#include <stdio.h> 43148456Spjd#include <string.h> 44148867Spjd#include <strings.h> 45148456Spjd#endif 46148456Spjd#ifndef _OpenSSL_ 47148456Spjd#include <sys/md5.h> 48148456Spjd#endif 49148456Spjd 50148456Spjd#define G_ELI_CLASS_NAME "ELI" 51148456Spjd#define G_ELI_MAGIC "GEOM::ELI" 52148456Spjd#define G_ELI_SUFFIX ".eli" 53148456Spjd 54148456Spjd/* 55148456Spjd * Version history: 56148456Spjd * 0 - Initial version number. 57159307Spjd * 1 - Added data authentication support (md_aalgo field and 58159307Spjd * G_ELI_FLAG_AUTH flag). 59161217Spjd * 2 - Added G_ELI_FLAG_READONLY. 60211927Spjd * 3 - Added 'configure' subcommand. 61211927Spjd * 4 - IV is generated from offset converted to little-endian 62161220Spjd * (flag G_ELI_FLAG_NATIVE_BYTE_ORDER will be set for older versions). 63213067Spjd * 5 - Added multiple encrypton keys. 64148456Spjd */ 65213067Spjd#define G_ELI_VERSION 5 66148456Spjd 67161127Spjd/* ON DISK FLAGS. */ 68148456Spjd/* Use random, onetime keys. */ 69161220Spjd#define G_ELI_FLAG_ONETIME 0x00000001 70148456Spjd/* Ask for the passphrase from the kernel, before mounting root. */ 71161220Spjd#define G_ELI_FLAG_BOOT 0x00000002 72148456Spjd/* Detach on last close, if we were open for writing. */ 73161220Spjd#define G_ELI_FLAG_WO_DETACH 0x00000004 74148456Spjd/* Detach on last close. */ 75161220Spjd#define G_ELI_FLAG_RW_DETACH 0x00000008 76159307Spjd/* Provide data authentication. */ 77161220Spjd#define G_ELI_FLAG_AUTH 0x00000010 78161127Spjd/* Provider is read-only, we should deny all write attempts. */ 79161220Spjd#define G_ELI_FLAG_RO 0x00000020 80161127Spjd/* RUNTIME FLAGS. */ 81148456Spjd/* Provider was open for writing. */ 82161220Spjd#define G_ELI_FLAG_WOPEN 0x00010000 83148456Spjd/* Destroy device. */ 84161220Spjd#define G_ELI_FLAG_DESTROY 0x00020000 85161220Spjd/* Provider uses native byte-order for IV generation. */ 86161220Spjd#define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000 87213067Spjd/* Provider uses single encryption key. */ 88213067Spjd#define G_ELI_FLAG_SINGLE_KEY 0x00080000 89148456Spjd 90148456Spjd#define SHA512_MDLEN 64 91159307Spjd#define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH 92148456Spjd 93148456Spjd#define G_ELI_MAXMKEYS 2 94148456Spjd#define G_ELI_MAXKEYLEN 64 95148456Spjd#define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN 96148456Spjd#define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN 97159307Spjd#define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN 98148456Spjd#define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN 99148456Spjd#define G_ELI_SALTLEN 64 100148456Spjd#define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN) 101148456Spjd/* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */ 102148456Spjd#define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN) 103213062Spjd#define G_ELI_OVERWRITES 5 104213067Spjd/* Switch data encryption key every 2^20 blocks. */ 105213067Spjd#define G_ELI_KEY_SHIFT 20 106148456Spjd 107148456Spjd#ifdef _KERNEL 108148456Spjdextern u_int g_eli_debug; 109148456Spjdextern u_int g_eli_overwrites; 110159307Spjdextern u_int g_eli_batch; 111148456Spjd 112148456Spjd#define G_ELI_CRYPTO_HW 1 113148456Spjd#define G_ELI_CRYPTO_SW 2 114148456Spjd 115148456Spjd#define G_ELI_DEBUG(lvl, ...) do { \ 116148456Spjd if (g_eli_debug >= (lvl)) { \ 117148456Spjd printf("GEOM_ELI"); \ 118148456Spjd if (g_eli_debug > 0) \ 119148456Spjd printf("[%u]", lvl); \ 120148456Spjd printf(": "); \ 121148456Spjd printf(__VA_ARGS__); \ 122148456Spjd printf("\n"); \ 123148456Spjd } \ 124148456Spjd} while (0) 125148456Spjd#define G_ELI_LOGREQ(lvl, bp, ...) do { \ 126148456Spjd if (g_eli_debug >= (lvl)) { \ 127148456Spjd printf("GEOM_ELI"); \ 128148456Spjd if (g_eli_debug > 0) \ 129148456Spjd printf("[%u]", lvl); \ 130148456Spjd printf(": "); \ 131148456Spjd printf(__VA_ARGS__); \ 132148456Spjd printf(" "); \ 133148456Spjd g_print_bio(bp); \ 134148456Spjd printf("\n"); \ 135148456Spjd } \ 136148456Spjd} while (0) 137148456Spjd 138148456Spjdstruct g_eli_worker { 139148456Spjd struct g_eli_softc *w_softc; 140148456Spjd struct proc *w_proc; 141148456Spjd u_int w_number; 142148456Spjd uint64_t w_sid; 143148456Spjd LIST_ENTRY(g_eli_worker) w_next; 144148456Spjd}; 145148456Spjd 146148456Spjdstruct g_eli_softc { 147213067Spjd struct g_geom *sc_geom; 148213067Spjd u_int sc_crypto; 149213067Spjd uint8_t sc_mkey[G_ELI_DATAIVKEYLEN]; 150213067Spjd uint8_t **sc_ekeys; 151213067Spjd u_int sc_nekeys; 152213067Spjd u_int sc_ealgo; 153213067Spjd u_int sc_ekeylen; 154213067Spjd uint8_t sc_akey[G_ELI_AUTHKEYLEN]; 155213067Spjd u_int sc_aalgo; 156213067Spjd u_int sc_akeylen; 157213067Spjd u_int sc_alen; 158213067Spjd SHA256_CTX sc_akeyctx; 159213067Spjd uint8_t sc_ivkey[G_ELI_IVKEYLEN]; 160213067Spjd SHA256_CTX sc_ivctx; 161213067Spjd int sc_nkey; 162213067Spjd uint32_t sc_flags; 163213067Spjd off_t sc_mediasize; 164213067Spjd size_t sc_sectorsize; 165213067Spjd u_int sc_bytes_per_sector; 166213067Spjd u_int sc_data_per_sector; 167148456Spjd 168148456Spjd /* Only for software cryptography. */ 169148456Spjd struct bio_queue_head sc_queue; 170213067Spjd struct mtx sc_queue_mtx; 171148456Spjd LIST_HEAD(, g_eli_worker) sc_workers; 172148456Spjd}; 173148456Spjd#define sc_name sc_geom->name 174148456Spjd#endif /* _KERNEL */ 175148456Spjd 176148456Spjdstruct g_eli_metadata { 177148456Spjd char md_magic[16]; /* Magic value. */ 178148456Spjd uint32_t md_version; /* Version number. */ 179148456Spjd uint32_t md_flags; /* Additional flags. */ 180159307Spjd uint16_t md_ealgo; /* Encryption algorithm. */ 181148456Spjd uint16_t md_keylen; /* Key length. */ 182159307Spjd uint16_t md_aalgo; /* Authentication algorithm. */ 183148456Spjd uint64_t md_provsize; /* Provider's size. */ 184148456Spjd uint32_t md_sectorsize; /* Sector size. */ 185148456Spjd uint8_t md_keys; /* Available keys. */ 186149303Spjd int32_t md_iterations; /* Number of iterations for PKCS#5v2. */ 187148456Spjd uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */ 188148456Spjd /* Encrypted master key (IV-key, Data-key, HMAC). */ 189148456Spjd uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN]; 190148456Spjd u_char md_hash[16]; /* MD5 hash. */ 191149323Spjd} __packed; 192148456Spjd#ifndef _OpenSSL_ 193148456Spjdstatic __inline void 194148456Spjdeli_metadata_encode(struct g_eli_metadata *md, u_char *data) 195148456Spjd{ 196148456Spjd MD5_CTX ctx; 197148456Spjd u_char *p; 198148456Spjd 199148456Spjd p = data; 200148456Spjd bcopy(md->md_magic, p, sizeof(md->md_magic)); p += sizeof(md->md_magic); 201148456Spjd le32enc(p, md->md_version); p += sizeof(md->md_version); 202148456Spjd le32enc(p, md->md_flags); p += sizeof(md->md_flags); 203159307Spjd le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo); 204148456Spjd le16enc(p, md->md_keylen); p += sizeof(md->md_keylen); 205159307Spjd le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo); 206148456Spjd le64enc(p, md->md_provsize); p += sizeof(md->md_provsize); 207148456Spjd le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize); 208148456Spjd *p = md->md_keys; p += sizeof(md->md_keys); 209148456Spjd le32enc(p, md->md_iterations); p += sizeof(md->md_iterations); 210148456Spjd bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt); 211148456Spjd bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 212148456Spjd MD5Init(&ctx); 213148456Spjd MD5Update(&ctx, data, p - data); 214157305Spjd MD5Final(md->md_hash, &ctx); 215148456Spjd bcopy(md->md_hash, p, sizeof(md->md_hash)); 216148456Spjd} 217148456Spjdstatic __inline int 218148456Spjdeli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md) 219148456Spjd{ 220148456Spjd MD5_CTX ctx; 221148456Spjd const u_char *p; 222148456Spjd 223148456Spjd p = data + sizeof(md->md_magic) + sizeof(md->md_version); 224148456Spjd md->md_flags = le32dec(p); p += sizeof(md->md_flags); 225159307Spjd md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 226148456Spjd md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 227148456Spjd md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 228148456Spjd md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 229148456Spjd md->md_keys = *p; p += sizeof(md->md_keys); 230148456Spjd md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 231148456Spjd bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 232148456Spjd bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 233148456Spjd MD5Init(&ctx); 234148456Spjd MD5Update(&ctx, data, p - data); 235157305Spjd MD5Final(md->md_hash, &ctx); 236148456Spjd if (bcmp(md->md_hash, p, 16) != 0) 237148456Spjd return (EINVAL); 238148456Spjd return (0); 239148456Spjd} 240212845Sbrian 241148456Spjdstatic __inline int 242213067Spjdeli_metadata_decode_v1v2v3v4v5(const u_char *data, struct g_eli_metadata *md) 243159307Spjd{ 244159307Spjd MD5_CTX ctx; 245159307Spjd const u_char *p; 246159307Spjd 247159307Spjd p = data + sizeof(md->md_magic) + sizeof(md->md_version); 248159307Spjd md->md_flags = le32dec(p); p += sizeof(md->md_flags); 249159307Spjd md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo); 250159307Spjd md->md_keylen = le16dec(p); p += sizeof(md->md_keylen); 251159307Spjd md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo); 252159307Spjd md->md_provsize = le64dec(p); p += sizeof(md->md_provsize); 253159307Spjd md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize); 254159307Spjd md->md_keys = *p; p += sizeof(md->md_keys); 255159307Spjd md->md_iterations = le32dec(p); p += sizeof(md->md_iterations); 256159307Spjd bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt); 257159307Spjd bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys); 258159307Spjd MD5Init(&ctx); 259159307Spjd MD5Update(&ctx, data, p - data); 260159307Spjd MD5Final(md->md_hash, &ctx); 261159307Spjd if (bcmp(md->md_hash, p, 16) != 0) 262159307Spjd return (EINVAL); 263159307Spjd return (0); 264159307Spjd} 265159307Spjdstatic __inline int 266148456Spjdeli_metadata_decode(const u_char *data, struct g_eli_metadata *md) 267148456Spjd{ 268148456Spjd int error; 269148456Spjd 270148456Spjd bcopy(data, md->md_magic, sizeof(md->md_magic)); 271148456Spjd md->md_version = le32dec(data + sizeof(md->md_magic)); 272148456Spjd switch (md->md_version) { 273148456Spjd case 0: 274148456Spjd error = eli_metadata_decode_v0(data, md); 275148456Spjd break; 276159307Spjd case 1: 277161217Spjd case 2: 278162353Spjd case 3: 279212845Sbrian case 4: 280213067Spjd case 5: 281213067Spjd error = eli_metadata_decode_v1v2v3v4v5(data, md); 282159307Spjd break; 283148456Spjd default: 284148456Spjd error = EINVAL; 285148456Spjd break; 286148456Spjd } 287148456Spjd return (error); 288148456Spjd} 289148456Spjd#endif /* !_OpenSSL */ 290148456Spjd 291148456Spjdstatic __inline u_int 292159307Spjdg_eli_str2ealgo(const char *name) 293148456Spjd{ 294148456Spjd 295148867Spjd if (strcasecmp("null", name) == 0) 296148456Spjd return (CRYPTO_NULL_CBC); 297148867Spjd else if (strcasecmp("aes", name) == 0) 298148456Spjd return (CRYPTO_AES_CBC); 299148867Spjd else if (strcasecmp("blowfish", name) == 0) 300148456Spjd return (CRYPTO_BLF_CBC); 301172031Spjd else if (strcasecmp("camellia", name) == 0) 302172031Spjd return (CRYPTO_CAMELLIA_CBC); 303148867Spjd else if (strcasecmp("3des", name) == 0) 304148456Spjd return (CRYPTO_3DES_CBC); 305148456Spjd return (CRYPTO_ALGORITHM_MIN - 1); 306148456Spjd} 307148456Spjd 308159307Spjdstatic __inline u_int 309159307Spjdg_eli_str2aalgo(const char *name) 310159307Spjd{ 311159307Spjd 312159307Spjd if (strcasecmp("hmac/md5", name) == 0) 313159307Spjd return (CRYPTO_MD5_HMAC); 314159307Spjd else if (strcasecmp("hmac/sha1", name) == 0) 315159307Spjd return (CRYPTO_SHA1_HMAC); 316159307Spjd else if (strcasecmp("hmac/ripemd160", name) == 0) 317159307Spjd return (CRYPTO_RIPEMD160_HMAC); 318159307Spjd else if (strcasecmp("hmac/sha256", name) == 0) 319159307Spjd return (CRYPTO_SHA2_256_HMAC); 320159307Spjd else if (strcasecmp("hmac/sha384", name) == 0) 321159307Spjd return (CRYPTO_SHA2_384_HMAC); 322159307Spjd else if (strcasecmp("hmac/sha512", name) == 0) 323159307Spjd return (CRYPTO_SHA2_512_HMAC); 324159307Spjd return (CRYPTO_ALGORITHM_MIN - 1); 325159307Spjd} 326159307Spjd 327148456Spjdstatic __inline const char * 328148456Spjdg_eli_algo2str(u_int algo) 329148456Spjd{ 330148456Spjd 331148456Spjd switch (algo) { 332148456Spjd case CRYPTO_NULL_CBC: 333148456Spjd return ("NULL"); 334148456Spjd case CRYPTO_AES_CBC: 335159307Spjd return ("AES-CBC"); 336148456Spjd case CRYPTO_BLF_CBC: 337159307Spjd return ("Blowfish-CBC"); 338172031Spjd case CRYPTO_CAMELLIA_CBC: 339172031Spjd return ("CAMELLIA-CBC"); 340148456Spjd case CRYPTO_3DES_CBC: 341159307Spjd return ("3DES-CBC"); 342159307Spjd case CRYPTO_MD5_HMAC: 343159307Spjd return ("HMAC/MD5"); 344159307Spjd case CRYPTO_SHA1_HMAC: 345159307Spjd return ("HMAC/SHA1"); 346159307Spjd case CRYPTO_RIPEMD160_HMAC: 347159307Spjd return ("HMAC/RIPEMD160"); 348159307Spjd case CRYPTO_SHA2_256_HMAC: 349159307Spjd return ("HMAC/SHA256"); 350159307Spjd case CRYPTO_SHA2_384_HMAC: 351159307Spjd return ("HMAC/SHA384"); 352159307Spjd case CRYPTO_SHA2_512_HMAC: 353159307Spjd return ("HMAC/SHA512"); 354148456Spjd } 355148456Spjd return ("unknown"); 356148456Spjd} 357148456Spjd 358148456Spjdstatic __inline void 359148456Spjdeli_metadata_dump(const struct g_eli_metadata *md) 360148456Spjd{ 361148456Spjd static const char hex[] = "0123456789abcdef"; 362148456Spjd char str[sizeof(md->md_mkeys) * 2 + 1]; 363148456Spjd u_int i; 364148456Spjd 365148456Spjd printf(" magic: %s\n", md->md_magic); 366148456Spjd printf(" version: %u\n", (u_int)md->md_version); 367148456Spjd printf(" flags: 0x%x\n", (u_int)md->md_flags); 368159307Spjd printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo)); 369148456Spjd printf(" keylen: %u\n", (u_int)md->md_keylen); 370159307Spjd if (md->md_flags & G_ELI_FLAG_AUTH) 371159307Spjd printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo)); 372148456Spjd printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); 373148456Spjd printf("sectorsize: %u\n", (u_int)md->md_sectorsize); 374148456Spjd printf(" keys: 0x%02x\n", (u_int)md->md_keys); 375148456Spjd printf("iterations: %u\n", (u_int)md->md_iterations); 376148456Spjd bzero(str, sizeof(str)); 377148456Spjd for (i = 0; i < sizeof(md->md_salt); i++) { 378148456Spjd str[i * 2] = hex[md->md_salt[i] >> 4]; 379148456Spjd str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f]; 380148456Spjd } 381149303Spjd printf(" Salt: %s\n", str); 382148456Spjd bzero(str, sizeof(str)); 383148456Spjd for (i = 0; i < sizeof(md->md_mkeys); i++) { 384148456Spjd str[i * 2] = hex[md->md_mkeys[i] >> 4]; 385148456Spjd str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f]; 386148456Spjd } 387148456Spjd printf("Master Key: %s\n", str); 388148456Spjd bzero(str, sizeof(str)); 389148456Spjd for (i = 0; i < 16; i++) { 390148456Spjd str[i * 2] = hex[md->md_hash[i] >> 4]; 391148456Spjd str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; 392148456Spjd } 393149303Spjd printf(" MD5 hash: %s\n", str); 394148456Spjd} 395148456Spjd 396148456Spjdstatic __inline u_int 397148456Spjdg_eli_keylen(u_int algo, u_int keylen) 398148456Spjd{ 399148456Spjd 400148456Spjd switch (algo) { 401148456Spjd case CRYPTO_NULL_CBC: 402148456Spjd if (keylen == 0) 403148456Spjd keylen = 64 * 8; 404148456Spjd else { 405148456Spjd if (keylen > 64 * 8) 406148456Spjd keylen = 0; 407148456Spjd } 408148456Spjd return (keylen); 409211927Spjd case CRYPTO_AES_CBC: 410172031Spjd case CRYPTO_CAMELLIA_CBC: 411148456Spjd switch (keylen) { 412148456Spjd case 0: 413148456Spjd return (128); 414148456Spjd case 128: 415148456Spjd case 192: 416148456Spjd case 256: 417148456Spjd return (keylen); 418148456Spjd default: 419148456Spjd return (0); 420148456Spjd } 421148456Spjd case CRYPTO_BLF_CBC: 422148456Spjd if (keylen == 0) 423148456Spjd return (128); 424148456Spjd if (keylen < 128 || keylen > 448) 425148456Spjd return (0); 426148456Spjd if ((keylen % 32) != 0) 427148456Spjd return (0); 428148456Spjd return (keylen); 429148456Spjd case CRYPTO_3DES_CBC: 430148456Spjd if (keylen == 0 || keylen == 192) 431148456Spjd return (192); 432148456Spjd return (0); 433148456Spjd default: 434148456Spjd return (0); 435148456Spjd } 436148456Spjd} 437148456Spjd 438159307Spjdstatic __inline u_int 439159307Spjdg_eli_hashlen(u_int algo) 440159307Spjd{ 441159307Spjd 442159307Spjd switch (algo) { 443159307Spjd case CRYPTO_MD5_HMAC: 444159307Spjd return (16); 445159307Spjd case CRYPTO_SHA1_HMAC: 446159307Spjd return (20); 447159307Spjd case CRYPTO_RIPEMD160_HMAC: 448159307Spjd return (20); 449159307Spjd case CRYPTO_SHA2_256_HMAC: 450159307Spjd return (32); 451159307Spjd case CRYPTO_SHA2_384_HMAC: 452159307Spjd return (48); 453159307Spjd case CRYPTO_SHA2_512_HMAC: 454159307Spjd return (64); 455159307Spjd } 456159307Spjd return (0); 457159307Spjd} 458159307Spjd 459148456Spjd#ifdef _KERNEL 460148456Spjdint g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 461148456Spjd struct g_eli_metadata *md); 462148456Spjdstruct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp, 463148456Spjd struct g_provider *bpp, const struct g_eli_metadata *md, 464148456Spjd const u_char *mkey, int nkey); 465148456Spjdint g_eli_destroy(struct g_eli_softc *sc, boolean_t force); 466148456Spjd 467148456Spjdint g_eli_access(struct g_provider *pp, int dr, int dw, int de); 468148456Spjdvoid g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb); 469159307Spjd 470159307Spjdvoid g_eli_read_done(struct bio *bp); 471159307Spjdvoid g_eli_write_done(struct bio *bp); 472159307Spjdint g_eli_crypto_rerun(struct cryptop *crp); 473213067Spjduint8_t *g_eli_crypto_key(struct g_eli_softc *sc, off_t offset, 474213067Spjd size_t blocksize); 475159307Spjdvoid g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 476159307Spjd size_t size); 477159307Spjd 478159307Spjdvoid g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp); 479159307Spjd 480159307Spjdvoid g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp); 481159307Spjdvoid g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp); 482148456Spjd#endif 483148456Spjd 484148456Spjdvoid g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key); 485148456Spjdint g_eli_mkey_decrypt(const struct g_eli_metadata *md, 486148456Spjd const unsigned char *key, unsigned char *mkey, unsigned *nkeyp); 487148456Spjdint g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen, 488148456Spjd unsigned char *mkey); 489159307Spjd#ifdef _KERNEL 490159307Spjdvoid g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey); 491159307Spjd#endif 492148456Spjd 493148456Spjdint g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize, 494148456Spjd const u_char *key, size_t keysize); 495148456Spjdint g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize, 496148456Spjd const u_char *key, size_t keysize); 497148456Spjd 498148456Spjdstruct hmac_ctx { 499148456Spjd SHA512_CTX shactx; 500148456Spjd u_char k_opad[128]; 501148456Spjd}; 502148456Spjd 503148456Spjdvoid g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey, 504148456Spjd size_t hkeylen); 505148456Spjdvoid g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data, 506148456Spjd size_t datasize); 507148456Spjdvoid g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize); 508148456Spjdvoid g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, 509148456Spjd const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize); 510148456Spjd#endif /* !_G_ELI_H_ */ 511