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: stable/10/sys/geom/eli/g_eli.h 314327 2017-02-27 08:27:38Z avg $
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 /* RUNTIME FLAGS. */
99 /* Provider was open for writing. */
100 #define G_ELI_FLAG_WOPEN 0x00010000
101 /* Destroy device. */
102 #define G_ELI_FLAG_DESTROY 0x00020000
103 /* Provider uses native byte-order for IV generation. */
104 #define G_ELI_FLAG_NATIVE_BYTE_ORDER 0x00040000
105 /* Provider uses single encryption key. */
106 #define G_ELI_FLAG_SINGLE_KEY 0x00080000
107 /* Device suspended. */
108 #define G_ELI_FLAG_SUSPEND 0x00100000
109 /* Provider uses first encryption key. */
110 #define G_ELI_FLAG_FIRST_KEY 0x00200000
111 /* Provider uses IV-Key for encryption key generation. */
112 #define G_ELI_FLAG_ENC_IVKEY 0x00400000
113
114 #define G_ELI_NEW_BIO 255
115
116 #define SHA512_MDLEN 64
117 #define G_ELI_AUTH_SECKEYLEN SHA256_DIGEST_LENGTH
118
119 #define G_ELI_MAXMKEYS 2
120 #define G_ELI_MAXKEYLEN 64
121 #define G_ELI_USERKEYLEN G_ELI_MAXKEYLEN
122 #define G_ELI_DATAKEYLEN G_ELI_MAXKEYLEN
123 #define G_ELI_AUTHKEYLEN G_ELI_MAXKEYLEN
124 #define G_ELI_IVKEYLEN G_ELI_MAXKEYLEN
125 #define G_ELI_SALTLEN 64
126 #define G_ELI_DATAIVKEYLEN (G_ELI_DATAKEYLEN + G_ELI_IVKEYLEN)
127 /* Data-Key, IV-Key, HMAC_SHA512(Derived-Key, Data-Key+IV-Key) */
128 #define G_ELI_MKEYLEN (G_ELI_DATAIVKEYLEN + SHA512_MDLEN)
129 #define G_ELI_OVERWRITES 5
130 /* Switch data encryption key every 2^20 blocks. */
131 #define G_ELI_KEY_SHIFT 20
132
133 #ifdef _KERNEL
134 extern int g_eli_debug;
135 extern u_int g_eli_overwrites;
136 extern u_int g_eli_batch;
137
138 #define G_ELI_CRYPTO_UNKNOWN 0
139 #define G_ELI_CRYPTO_HW 1
140 #define G_ELI_CRYPTO_SW 2
141
142 #define G_ELI_DEBUG(lvl, ...) do { \
143 if (g_eli_debug >= (lvl)) { \
144 printf("GEOM_ELI"); \
145 if (g_eli_debug > 0) \
146 printf("[%u]", lvl); \
147 printf(": "); \
148 printf(__VA_ARGS__); \
149 printf("\n"); \
150 } \
151 } while (0)
152 #define G_ELI_LOGREQ(lvl, bp, ...) do { \
153 if (g_eli_debug >= (lvl)) { \
154 printf("GEOM_ELI"); \
155 if (g_eli_debug > 0) \
156 printf("[%u]", lvl); \
157 printf(": "); \
158 printf(__VA_ARGS__); \
159 printf(" "); \
160 g_print_bio(bp); \
161 printf("\n"); \
162 } \
163 } while (0)
164
165 struct g_eli_worker {
166 struct g_eli_softc *w_softc;
167 struct proc *w_proc;
168 u_int w_number;
169 uint64_t w_sid;
170 boolean_t w_active;
171 LIST_ENTRY(g_eli_worker) w_next;
172 };
173
174 struct g_eli_softc {
175 struct g_geom *sc_geom;
176 u_int sc_version;
177 u_int sc_crypto;
178 uint8_t sc_mkey[G_ELI_DATAIVKEYLEN];
179 uint8_t sc_ekey[G_ELI_DATAKEYLEN];
180 TAILQ_HEAD(, g_eli_key) sc_ekeys_queue;
181 RB_HEAD(g_eli_key_tree, g_eli_key) sc_ekeys_tree;
182 struct mtx sc_ekeys_lock;
183 uint64_t sc_ekeys_total;
184 uint64_t sc_ekeys_allocated;
185 u_int sc_ealgo;
186 u_int sc_ekeylen;
187 uint8_t sc_akey[G_ELI_AUTHKEYLEN];
188 u_int sc_aalgo;
189 u_int sc_akeylen;
190 u_int sc_alen;
191 SHA256_CTX sc_akeyctx;
192 uint8_t sc_ivkey[G_ELI_IVKEYLEN];
193 SHA256_CTX sc_ivctx;
194 int sc_nkey;
195 uint32_t sc_flags;
196 int sc_inflight;
197 off_t sc_mediasize;
198 size_t sc_sectorsize;
199 u_int sc_bytes_per_sector;
200 u_int sc_data_per_sector;
201 boolean_t sc_cpubind;
202
203 /* Only for software cryptography. */
204 struct bio_queue_head sc_queue;
205 struct mtx sc_queue_mtx;
206 LIST_HEAD(, g_eli_worker) sc_workers;
207 };
208 #define sc_name sc_geom->name
209 #endif /* _KERNEL */
210
211 struct g_eli_metadata {
212 char md_magic[16]; /* Magic value. */
213 uint32_t md_version; /* Version number. */
214 uint32_t md_flags; /* Additional flags. */
215 uint16_t md_ealgo; /* Encryption algorithm. */
216 uint16_t md_keylen; /* Key length. */
217 uint16_t md_aalgo; /* Authentication algorithm. */
218 uint64_t md_provsize; /* Provider's size. */
219 uint32_t md_sectorsize; /* Sector size. */
220 uint8_t md_keys; /* Available keys. */
221 int32_t md_iterations; /* Number of iterations for PKCS#5v2. */
222 uint8_t md_salt[G_ELI_SALTLEN]; /* Salt. */
223 /* Encrypted master key (IV-key, Data-key, HMAC). */
224 uint8_t md_mkeys[G_ELI_MAXMKEYS * G_ELI_MKEYLEN];
225 u_char md_hash[16]; /* MD5 hash. */
226 } __packed;
227 #ifndef _OpenSSL_
228 static __inline void
eli_metadata_encode_v0(struct g_eli_metadata * md,u_char ** datap)229 eli_metadata_encode_v0(struct g_eli_metadata *md, u_char **datap)
230 {
231 u_char *p;
232
233 p = *datap;
234 le32enc(p, md->md_flags); p += sizeof(md->md_flags);
235 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo);
236 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen);
237 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize);
238 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize);
239 *p = md->md_keys; p += sizeof(md->md_keys);
240 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations);
241 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt);
242 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys);
243 *datap = p;
244 }
245 static __inline void
eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata * md,u_char ** datap)246 eli_metadata_encode_v1v2v3v4v5v6v7(struct g_eli_metadata *md, u_char **datap)
247 {
248 u_char *p;
249
250 p = *datap;
251 le32enc(p, md->md_flags); p += sizeof(md->md_flags);
252 le16enc(p, md->md_ealgo); p += sizeof(md->md_ealgo);
253 le16enc(p, md->md_keylen); p += sizeof(md->md_keylen);
254 le16enc(p, md->md_aalgo); p += sizeof(md->md_aalgo);
255 le64enc(p, md->md_provsize); p += sizeof(md->md_provsize);
256 le32enc(p, md->md_sectorsize); p += sizeof(md->md_sectorsize);
257 *p = md->md_keys; p += sizeof(md->md_keys);
258 le32enc(p, md->md_iterations); p += sizeof(md->md_iterations);
259 bcopy(md->md_salt, p, sizeof(md->md_salt)); p += sizeof(md->md_salt);
260 bcopy(md->md_mkeys, p, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys);
261 *datap = p;
262 }
263 static __inline void
eli_metadata_encode(struct g_eli_metadata * md,u_char * data)264 eli_metadata_encode(struct g_eli_metadata *md, u_char *data)
265 {
266 MD5_CTX ctx;
267 u_char *p;
268
269 p = data;
270 bcopy(md->md_magic, p, sizeof(md->md_magic));
271 p += sizeof(md->md_magic);
272 le32enc(p, md->md_version);
273 p += sizeof(md->md_version);
274 switch (md->md_version) {
275 case G_ELI_VERSION_00:
276 eli_metadata_encode_v0(md, &p);
277 break;
278 case G_ELI_VERSION_01:
279 case G_ELI_VERSION_02:
280 case G_ELI_VERSION_03:
281 case G_ELI_VERSION_04:
282 case G_ELI_VERSION_05:
283 case G_ELI_VERSION_06:
284 case G_ELI_VERSION_07:
285 eli_metadata_encode_v1v2v3v4v5v6v7(md, &p);
286 break;
287 default:
288 #ifdef _KERNEL
289 panic("%s: Unsupported version %u.", __func__,
290 (u_int)md->md_version);
291 #else
292 assert(!"Unsupported metadata version.");
293 #endif
294 }
295 MD5Init(&ctx);
296 MD5Update(&ctx, data, p - data);
297 MD5Final(md->md_hash, &ctx);
298 bcopy(md->md_hash, p, sizeof(md->md_hash));
299 }
300 static __inline int
eli_metadata_decode_v0(const u_char * data,struct g_eli_metadata * md)301 eli_metadata_decode_v0(const u_char *data, struct g_eli_metadata *md)
302 {
303 MD5_CTX ctx;
304 const u_char *p;
305
306 p = data + sizeof(md->md_magic) + sizeof(md->md_version);
307 md->md_flags = le32dec(p); p += sizeof(md->md_flags);
308 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo);
309 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen);
310 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize);
311 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize);
312 md->md_keys = *p; p += sizeof(md->md_keys);
313 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations);
314 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt);
315 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys);
316 MD5Init(&ctx);
317 MD5Update(&ctx, data, p - data);
318 MD5Final(md->md_hash, &ctx);
319 if (bcmp(md->md_hash, p, 16) != 0)
320 return (EINVAL);
321 return (0);
322 }
323
324 static __inline int
eli_metadata_decode_v1v2v3v4v5v6v7(const u_char * data,struct g_eli_metadata * md)325 eli_metadata_decode_v1v2v3v4v5v6v7(const u_char *data, struct g_eli_metadata *md)
326 {
327 MD5_CTX ctx;
328 const u_char *p;
329
330 p = data + sizeof(md->md_magic) + sizeof(md->md_version);
331 md->md_flags = le32dec(p); p += sizeof(md->md_flags);
332 md->md_ealgo = le16dec(p); p += sizeof(md->md_ealgo);
333 md->md_keylen = le16dec(p); p += sizeof(md->md_keylen);
334 md->md_aalgo = le16dec(p); p += sizeof(md->md_aalgo);
335 md->md_provsize = le64dec(p); p += sizeof(md->md_provsize);
336 md->md_sectorsize = le32dec(p); p += sizeof(md->md_sectorsize);
337 md->md_keys = *p; p += sizeof(md->md_keys);
338 md->md_iterations = le32dec(p); p += sizeof(md->md_iterations);
339 bcopy(p, md->md_salt, sizeof(md->md_salt)); p += sizeof(md->md_salt);
340 bcopy(p, md->md_mkeys, sizeof(md->md_mkeys)); p += sizeof(md->md_mkeys);
341 MD5Init(&ctx);
342 MD5Update(&ctx, data, p - data);
343 MD5Final(md->md_hash, &ctx);
344 if (bcmp(md->md_hash, p, 16) != 0)
345 return (EINVAL);
346 return (0);
347 }
348 static __inline int
eli_metadata_decode(const u_char * data,struct g_eli_metadata * md)349 eli_metadata_decode(const u_char *data, struct g_eli_metadata *md)
350 {
351 int error;
352
353 bcopy(data, md->md_magic, sizeof(md->md_magic));
354 if (strcmp(md->md_magic, G_ELI_MAGIC) != 0)
355 return (EINVAL);
356 md->md_version = le32dec(data + sizeof(md->md_magic));
357 switch (md->md_version) {
358 case G_ELI_VERSION_00:
359 error = eli_metadata_decode_v0(data, md);
360 break;
361 case G_ELI_VERSION_01:
362 case G_ELI_VERSION_02:
363 case G_ELI_VERSION_03:
364 case G_ELI_VERSION_04:
365 case G_ELI_VERSION_05:
366 case G_ELI_VERSION_06:
367 case G_ELI_VERSION_07:
368 error = eli_metadata_decode_v1v2v3v4v5v6v7(data, md);
369 break;
370 default:
371 error = EOPNOTSUPP;
372 break;
373 }
374 return (error);
375 }
376 #endif /* !_OpenSSL */
377
378 static __inline u_int
g_eli_str2ealgo(const char * name)379 g_eli_str2ealgo(const char *name)
380 {
381
382 if (strcasecmp("null", name) == 0)
383 return (CRYPTO_NULL_CBC);
384 else if (strcasecmp("null-cbc", name) == 0)
385 return (CRYPTO_NULL_CBC);
386 else if (strcasecmp("aes", name) == 0)
387 return (CRYPTO_AES_XTS);
388 else if (strcasecmp("aes-cbc", name) == 0)
389 return (CRYPTO_AES_CBC);
390 else if (strcasecmp("aes-xts", name) == 0)
391 return (CRYPTO_AES_XTS);
392 else if (strcasecmp("blowfish", name) == 0)
393 return (CRYPTO_BLF_CBC);
394 else if (strcasecmp("blowfish-cbc", name) == 0)
395 return (CRYPTO_BLF_CBC);
396 else if (strcasecmp("camellia", name) == 0)
397 return (CRYPTO_CAMELLIA_CBC);
398 else if (strcasecmp("camellia-cbc", name) == 0)
399 return (CRYPTO_CAMELLIA_CBC);
400 else if (strcasecmp("3des", name) == 0)
401 return (CRYPTO_3DES_CBC);
402 else if (strcasecmp("3des-cbc", name) == 0)
403 return (CRYPTO_3DES_CBC);
404 return (CRYPTO_ALGORITHM_MIN - 1);
405 }
406
407 static __inline u_int
g_eli_str2aalgo(const char * name)408 g_eli_str2aalgo(const char *name)
409 {
410
411 if (strcasecmp("hmac/md5", name) == 0)
412 return (CRYPTO_MD5_HMAC);
413 else if (strcasecmp("hmac/sha1", name) == 0)
414 return (CRYPTO_SHA1_HMAC);
415 else if (strcasecmp("hmac/ripemd160", name) == 0)
416 return (CRYPTO_RIPEMD160_HMAC);
417 else if (strcasecmp("hmac/sha256", name) == 0)
418 return (CRYPTO_SHA2_256_HMAC);
419 else if (strcasecmp("hmac/sha384", name) == 0)
420 return (CRYPTO_SHA2_384_HMAC);
421 else if (strcasecmp("hmac/sha512", name) == 0)
422 return (CRYPTO_SHA2_512_HMAC);
423 return (CRYPTO_ALGORITHM_MIN - 1);
424 }
425
426 static __inline const char *
g_eli_algo2str(u_int algo)427 g_eli_algo2str(u_int algo)
428 {
429
430 switch (algo) {
431 case CRYPTO_NULL_CBC:
432 return ("NULL");
433 case CRYPTO_AES_CBC:
434 return ("AES-CBC");
435 case CRYPTO_AES_XTS:
436 return ("AES-XTS");
437 case CRYPTO_BLF_CBC:
438 return ("Blowfish-CBC");
439 case CRYPTO_CAMELLIA_CBC:
440 return ("CAMELLIA-CBC");
441 case CRYPTO_3DES_CBC:
442 return ("3DES-CBC");
443 case CRYPTO_MD5_HMAC:
444 return ("HMAC/MD5");
445 case CRYPTO_SHA1_HMAC:
446 return ("HMAC/SHA1");
447 case CRYPTO_RIPEMD160_HMAC:
448 return ("HMAC/RIPEMD160");
449 case CRYPTO_SHA2_256_HMAC:
450 return ("HMAC/SHA256");
451 case CRYPTO_SHA2_384_HMAC:
452 return ("HMAC/SHA384");
453 case CRYPTO_SHA2_512_HMAC:
454 return ("HMAC/SHA512");
455 }
456 return ("unknown");
457 }
458
459 static __inline void
eli_metadata_dump(const struct g_eli_metadata * md)460 eli_metadata_dump(const struct g_eli_metadata *md)
461 {
462 static const char hex[] = "0123456789abcdef";
463 char str[sizeof(md->md_mkeys) * 2 + 1];
464 u_int i;
465
466 printf(" magic: %s\n", md->md_magic);
467 printf(" version: %u\n", (u_int)md->md_version);
468 printf(" flags: 0x%x\n", (u_int)md->md_flags);
469 printf(" ealgo: %s\n", g_eli_algo2str(md->md_ealgo));
470 printf(" keylen: %u\n", (u_int)md->md_keylen);
471 if (md->md_flags & G_ELI_FLAG_AUTH)
472 printf(" aalgo: %s\n", g_eli_algo2str(md->md_aalgo));
473 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize);
474 printf("sectorsize: %u\n", (u_int)md->md_sectorsize);
475 printf(" keys: 0x%02x\n", (u_int)md->md_keys);
476 printf("iterations: %u\n", (u_int)md->md_iterations);
477 bzero(str, sizeof(str));
478 for (i = 0; i < sizeof(md->md_salt); i++) {
479 str[i * 2] = hex[md->md_salt[i] >> 4];
480 str[i * 2 + 1] = hex[md->md_salt[i] & 0x0f];
481 }
482 printf(" Salt: %s\n", str);
483 bzero(str, sizeof(str));
484 for (i = 0; i < sizeof(md->md_mkeys); i++) {
485 str[i * 2] = hex[md->md_mkeys[i] >> 4];
486 str[i * 2 + 1] = hex[md->md_mkeys[i] & 0x0f];
487 }
488 printf("Master Key: %s\n", str);
489 bzero(str, sizeof(str));
490 for (i = 0; i < 16; i++) {
491 str[i * 2] = hex[md->md_hash[i] >> 4];
492 str[i * 2 + 1] = hex[md->md_hash[i] & 0x0f];
493 }
494 printf(" MD5 hash: %s\n", str);
495 }
496
497 static __inline u_int
g_eli_keylen(u_int algo,u_int keylen)498 g_eli_keylen(u_int algo, u_int keylen)
499 {
500
501 switch (algo) {
502 case CRYPTO_NULL_CBC:
503 if (keylen == 0)
504 keylen = 64 * 8;
505 else {
506 if (keylen > 64 * 8)
507 keylen = 0;
508 }
509 return (keylen);
510 case CRYPTO_AES_CBC:
511 case CRYPTO_CAMELLIA_CBC:
512 switch (keylen) {
513 case 0:
514 return (128);
515 case 128:
516 case 192:
517 case 256:
518 return (keylen);
519 default:
520 return (0);
521 }
522 case CRYPTO_AES_XTS:
523 switch (keylen) {
524 case 0:
525 return (128);
526 case 128:
527 case 256:
528 return (keylen);
529 default:
530 return (0);
531 }
532 case CRYPTO_BLF_CBC:
533 if (keylen == 0)
534 return (128);
535 if (keylen < 128 || keylen > 448)
536 return (0);
537 if ((keylen % 32) != 0)
538 return (0);
539 return (keylen);
540 case CRYPTO_3DES_CBC:
541 if (keylen == 0 || keylen == 192)
542 return (192);
543 return (0);
544 default:
545 return (0);
546 }
547 }
548
549 static __inline u_int
g_eli_hashlen(u_int algo)550 g_eli_hashlen(u_int algo)
551 {
552
553 switch (algo) {
554 case CRYPTO_MD5_HMAC:
555 return (16);
556 case CRYPTO_SHA1_HMAC:
557 return (20);
558 case CRYPTO_RIPEMD160_HMAC:
559 return (20);
560 case CRYPTO_SHA2_256_HMAC:
561 return (32);
562 case CRYPTO_SHA2_384_HMAC:
563 return (48);
564 case CRYPTO_SHA2_512_HMAC:
565 return (64);
566 }
567 return (0);
568 }
569
570 #ifdef _KERNEL
571 int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp,
572 struct g_eli_metadata *md);
573 struct g_geom *g_eli_create(struct gctl_req *req, struct g_class *mp,
574 struct g_provider *bpp, const struct g_eli_metadata *md,
575 const u_char *mkey, int nkey);
576 int g_eli_destroy(struct g_eli_softc *sc, boolean_t force);
577
578 int g_eli_access(struct g_provider *pp, int dr, int dw, int de);
579 void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb);
580
581 void g_eli_read_done(struct bio *bp);
582 void g_eli_write_done(struct bio *bp);
583 int g_eli_crypto_rerun(struct cryptop *crp);
584 void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
585 size_t size);
586
587 void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker);
588 void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp);
589
590 void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp);
591 void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp);
592 #endif
593
594 void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key);
595 int g_eli_mkey_decrypt(const struct g_eli_metadata *md,
596 const unsigned char *key, unsigned char *mkey, unsigned *nkeyp);
597 int g_eli_mkey_encrypt(unsigned algo, const unsigned char *key, unsigned keylen,
598 unsigned char *mkey);
599 #ifdef _KERNEL
600 void g_eli_mkey_propagate(struct g_eli_softc *sc, const unsigned char *mkey);
601 #endif
602
603 int g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize,
604 const u_char *key, size_t keysize);
605 int g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize,
606 const u_char *key, size_t keysize);
607
608 struct hmac_ctx {
609 SHA512_CTX shactx;
610 u_char k_opad[128];
611 };
612
613 void g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey,
614 size_t hkeylen);
615 void g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data,
616 size_t datasize);
617 void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize);
618 void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize,
619 const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize);
620
621 #ifdef _KERNEL
622 void g_eli_key_init(struct g_eli_softc *sc);
623 void g_eli_key_destroy(struct g_eli_softc *sc);
624 uint8_t *g_eli_key_hold(struct g_eli_softc *sc, off_t offset, size_t blocksize);
625 void g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey);
626 #endif
627 #endif /* !_G_ELI_H_ */
628