]>
Commit | Line | Data |
---|---|---|
3e308f20 DB |
1 | /* |
2 | * QEMU Crypto block device encryption LUKS format | |
3 | * | |
4 | * Copyright (c) 2015-2016 Red Hat, Inc. | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
b7cbb874 | 9 | * version 2.1 of the License, or (at your option) any later version. |
3e308f20 DB |
10 | * |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include "qemu/osdep.h" | |
da34e65c | 22 | #include "qapi/error.h" |
58369e22 | 23 | #include "qemu/bswap.h" |
3e308f20 | 24 | |
986bc8de | 25 | #include "block-luks.h" |
3e308f20 DB |
26 | |
27 | #include "crypto/hash.h" | |
28 | #include "crypto/afsplit.h" | |
29 | #include "crypto/pbkdf.h" | |
30 | #include "crypto/secret.h" | |
31 | #include "crypto/random.h" | |
2ef950f9 | 32 | #include "qemu/uuid.h" |
3e308f20 DB |
33 | |
34 | #include "qemu/coroutine.h" | |
35 | ||
36 | /* | |
37 | * Reference for the LUKS format implemented here is | |
38 | * | |
39 | * docs/on-disk-format.pdf | |
40 | * | |
41 | * in 'cryptsetup' package source code | |
42 | * | |
43 | * This file implements the 1.2.1 specification, dated | |
44 | * Oct 16, 2011. | |
45 | */ | |
46 | ||
47 | typedef struct QCryptoBlockLUKS QCryptoBlockLUKS; | |
48 | typedef struct QCryptoBlockLUKSHeader QCryptoBlockLUKSHeader; | |
49 | typedef struct QCryptoBlockLUKSKeySlot QCryptoBlockLUKSKeySlot; | |
50 | ||
51 | ||
52 | /* The following constants are all defined by the LUKS spec */ | |
53 | #define QCRYPTO_BLOCK_LUKS_VERSION 1 | |
54 | ||
55 | #define QCRYPTO_BLOCK_LUKS_MAGIC_LEN 6 | |
56 | #define QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN 32 | |
57 | #define QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN 32 | |
58 | #define QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN 32 | |
59 | #define QCRYPTO_BLOCK_LUKS_DIGEST_LEN 20 | |
60 | #define QCRYPTO_BLOCK_LUKS_SALT_LEN 32 | |
61 | #define QCRYPTO_BLOCK_LUKS_UUID_LEN 40 | |
62 | #define QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS 8 | |
63 | #define QCRYPTO_BLOCK_LUKS_STRIPES 4000 | |
64 | #define QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS 1000 | |
65 | #define QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS 1000 | |
66 | #define QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET 4096 | |
67 | ||
68 | #define QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED 0x0000DEAD | |
69 | #define QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED 0x00AC71F3 | |
70 | ||
71 | #define QCRYPTO_BLOCK_LUKS_SECTOR_SIZE 512LL | |
72 | ||
73 | static const char qcrypto_block_luks_magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN] = { | |
74 | 'L', 'U', 'K', 'S', 0xBA, 0xBE | |
75 | }; | |
76 | ||
77 | typedef struct QCryptoBlockLUKSNameMap QCryptoBlockLUKSNameMap; | |
78 | struct QCryptoBlockLUKSNameMap { | |
79 | const char *name; | |
80 | int id; | |
81 | }; | |
82 | ||
83 | typedef struct QCryptoBlockLUKSCipherSizeMap QCryptoBlockLUKSCipherSizeMap; | |
84 | struct QCryptoBlockLUKSCipherSizeMap { | |
85 | uint32_t key_bytes; | |
86 | int id; | |
87 | }; | |
88 | typedef struct QCryptoBlockLUKSCipherNameMap QCryptoBlockLUKSCipherNameMap; | |
89 | struct QCryptoBlockLUKSCipherNameMap { | |
90 | const char *name; | |
91 | const QCryptoBlockLUKSCipherSizeMap *sizes; | |
92 | }; | |
93 | ||
94 | ||
95 | static const QCryptoBlockLUKSCipherSizeMap | |
96 | qcrypto_block_luks_cipher_size_map_aes[] = { | |
97 | { 16, QCRYPTO_CIPHER_ALG_AES_128 }, | |
98 | { 24, QCRYPTO_CIPHER_ALG_AES_192 }, | |
99 | { 32, QCRYPTO_CIPHER_ALG_AES_256 }, | |
100 | { 0, 0 }, | |
101 | }; | |
102 | ||
103 | static const QCryptoBlockLUKSCipherSizeMap | |
104 | qcrypto_block_luks_cipher_size_map_cast5[] = { | |
105 | { 16, QCRYPTO_CIPHER_ALG_CAST5_128 }, | |
106 | { 0, 0 }, | |
107 | }; | |
108 | ||
109 | static const QCryptoBlockLUKSCipherSizeMap | |
110 | qcrypto_block_luks_cipher_size_map_serpent[] = { | |
111 | { 16, QCRYPTO_CIPHER_ALG_SERPENT_128 }, | |
112 | { 24, QCRYPTO_CIPHER_ALG_SERPENT_192 }, | |
113 | { 32, QCRYPTO_CIPHER_ALG_SERPENT_256 }, | |
114 | { 0, 0 }, | |
115 | }; | |
116 | ||
117 | static const QCryptoBlockLUKSCipherSizeMap | |
118 | qcrypto_block_luks_cipher_size_map_twofish[] = { | |
119 | { 16, QCRYPTO_CIPHER_ALG_TWOFISH_128 }, | |
120 | { 24, QCRYPTO_CIPHER_ALG_TWOFISH_192 }, | |
121 | { 32, QCRYPTO_CIPHER_ALG_TWOFISH_256 }, | |
122 | { 0, 0 }, | |
123 | }; | |
124 | ||
125 | static const QCryptoBlockLUKSCipherNameMap | |
126 | qcrypto_block_luks_cipher_name_map[] = { | |
127 | { "aes", qcrypto_block_luks_cipher_size_map_aes }, | |
128 | { "cast5", qcrypto_block_luks_cipher_size_map_cast5 }, | |
129 | { "serpent", qcrypto_block_luks_cipher_size_map_serpent }, | |
130 | { "twofish", qcrypto_block_luks_cipher_size_map_twofish }, | |
131 | }; | |
132 | ||
133 | ||
134 | /* | |
135 | * This struct is written to disk in big-endian format, | |
136 | * but operated upon in native-endian format. | |
137 | */ | |
138 | struct QCryptoBlockLUKSKeySlot { | |
139 | /* state of keyslot, enabled/disable */ | |
140 | uint32_t active; | |
141 | /* iterations for PBKDF2 */ | |
142 | uint32_t iterations; | |
143 | /* salt for PBKDF2 */ | |
144 | uint8_t salt[QCRYPTO_BLOCK_LUKS_SALT_LEN]; | |
145 | /* start sector of key material */ | |
f0d3c362 | 146 | uint32_t key_offset_sector; |
3e308f20 DB |
147 | /* number of anti-forensic stripes */ |
148 | uint32_t stripes; | |
5993e3be | 149 | }; |
3e308f20 DB |
150 | |
151 | QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSKeySlot) != 48); | |
152 | ||
153 | ||
154 | /* | |
155 | * This struct is written to disk in big-endian format, | |
156 | * but operated upon in native-endian format. | |
157 | */ | |
158 | struct QCryptoBlockLUKSHeader { | |
159 | /* 'L', 'U', 'K', 'S', '0xBA', '0xBE' */ | |
160 | char magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN]; | |
161 | ||
162 | /* LUKS version, currently 1 */ | |
163 | uint16_t version; | |
164 | ||
165 | /* cipher name specification (aes, etc) */ | |
166 | char cipher_name[QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN]; | |
167 | ||
168 | /* cipher mode specification (cbc-plain, xts-essiv:sha256, etc) */ | |
169 | char cipher_mode[QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN]; | |
170 | ||
171 | /* hash specification (sha256, etc) */ | |
172 | char hash_spec[QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN]; | |
173 | ||
174 | /* start offset of the volume data (in 512 byte sectors) */ | |
f0d3c362 | 175 | uint32_t payload_offset_sector; |
3e308f20 DB |
176 | |
177 | /* Number of key bytes */ | |
f0d3c362 | 178 | uint32_t master_key_len; |
3e308f20 DB |
179 | |
180 | /* master key checksum after PBKDF2 */ | |
181 | uint8_t master_key_digest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN]; | |
182 | ||
183 | /* salt for master key PBKDF2 */ | |
184 | uint8_t master_key_salt[QCRYPTO_BLOCK_LUKS_SALT_LEN]; | |
185 | ||
186 | /* iterations for master key PBKDF2 */ | |
187 | uint32_t master_key_iterations; | |
188 | ||
189 | /* UUID of the partition in standard ASCII representation */ | |
190 | uint8_t uuid[QCRYPTO_BLOCK_LUKS_UUID_LEN]; | |
191 | ||
192 | /* key slots */ | |
193 | QCryptoBlockLUKSKeySlot key_slots[QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS]; | |
5993e3be | 194 | }; |
3e308f20 DB |
195 | |
196 | QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSHeader) != 592); | |
197 | ||
198 | ||
199 | struct QCryptoBlockLUKS { | |
200 | QCryptoBlockLUKSHeader header; | |
40c85028 | 201 | |
9d80e59d | 202 | /* Main encryption algorithm used for encryption*/ |
40c85028 | 203 | QCryptoCipherAlgorithm cipher_alg; |
9d80e59d ML |
204 | |
205 | /* Mode of encryption for the selected encryption algorithm */ | |
40c85028 | 206 | QCryptoCipherMode cipher_mode; |
9d80e59d ML |
207 | |
208 | /* Initialization vector generation algorithm */ | |
40c85028 | 209 | QCryptoIVGenAlgorithm ivgen_alg; |
9d80e59d ML |
210 | |
211 | /* Hash algorithm used for IV generation*/ | |
40c85028 | 212 | QCryptoHashAlgorithm ivgen_hash_alg; |
9d80e59d ML |
213 | |
214 | /* | |
215 | * Encryption algorithm used for IV generation. | |
216 | * Usually the same as main encryption algorithm | |
217 | */ | |
218 | QCryptoCipherAlgorithm ivgen_cipher_alg; | |
219 | ||
220 | /* Hash algorithm used in pbkdf2 function */ | |
40c85028 | 221 | QCryptoHashAlgorithm hash_alg; |
3e308f20 DB |
222 | }; |
223 | ||
224 | ||
225 | static int qcrypto_block_luks_cipher_name_lookup(const char *name, | |
226 | QCryptoCipherMode mode, | |
227 | uint32_t key_bytes, | |
228 | Error **errp) | |
229 | { | |
230 | const QCryptoBlockLUKSCipherNameMap *map = | |
231 | qcrypto_block_luks_cipher_name_map; | |
232 | size_t maplen = G_N_ELEMENTS(qcrypto_block_luks_cipher_name_map); | |
233 | size_t i, j; | |
234 | ||
235 | if (mode == QCRYPTO_CIPHER_MODE_XTS) { | |
236 | key_bytes /= 2; | |
237 | } | |
238 | ||
239 | for (i = 0; i < maplen; i++) { | |
240 | if (!g_str_equal(map[i].name, name)) { | |
241 | continue; | |
242 | } | |
243 | for (j = 0; j < map[i].sizes[j].key_bytes; j++) { | |
244 | if (map[i].sizes[j].key_bytes == key_bytes) { | |
245 | return map[i].sizes[j].id; | |
246 | } | |
247 | } | |
248 | } | |
249 | ||
250 | error_setg(errp, "Algorithm %s with key size %d bytes not supported", | |
251 | name, key_bytes); | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static const char * | |
256 | qcrypto_block_luks_cipher_alg_lookup(QCryptoCipherAlgorithm alg, | |
257 | Error **errp) | |
258 | { | |
259 | const QCryptoBlockLUKSCipherNameMap *map = | |
260 | qcrypto_block_luks_cipher_name_map; | |
261 | size_t maplen = G_N_ELEMENTS(qcrypto_block_luks_cipher_name_map); | |
262 | size_t i, j; | |
263 | for (i = 0; i < maplen; i++) { | |
264 | for (j = 0; j < map[i].sizes[j].key_bytes; j++) { | |
265 | if (map[i].sizes[j].id == alg) { | |
266 | return map[i].name; | |
267 | } | |
268 | } | |
269 | } | |
270 | ||
271 | error_setg(errp, "Algorithm '%s' not supported", | |
977c736f | 272 | QCryptoCipherAlgorithm_str(alg)); |
3e308f20 DB |
273 | return NULL; |
274 | } | |
275 | ||
276 | /* XXX replace with qapi_enum_parse() in future, when we can | |
277 | * make that function emit a more friendly error message */ | |
278 | static int qcrypto_block_luks_name_lookup(const char *name, | |
f7abe0ec | 279 | const QEnumLookup *map, |
3e308f20 DB |
280 | const char *type, |
281 | Error **errp) | |
282 | { | |
9ae33079 | 283 | int ret = qapi_enum_parse(map, name, -1, NULL); |
3e308f20 | 284 | |
9ae33079 MA |
285 | if (ret < 0) { |
286 | error_setg(errp, "%s %s not supported", type, name); | |
287 | return 0; | |
288 | } | |
289 | return ret; | |
3e308f20 DB |
290 | } |
291 | ||
292 | #define qcrypto_block_luks_cipher_mode_lookup(name, errp) \ | |
293 | qcrypto_block_luks_name_lookup(name, \ | |
f7abe0ec | 294 | &QCryptoCipherMode_lookup, \ |
3e308f20 DB |
295 | "Cipher mode", \ |
296 | errp) | |
297 | ||
298 | #define qcrypto_block_luks_hash_name_lookup(name, errp) \ | |
299 | qcrypto_block_luks_name_lookup(name, \ | |
f7abe0ec | 300 | &QCryptoHashAlgorithm_lookup, \ |
3e308f20 DB |
301 | "Hash algorithm", \ |
302 | errp) | |
303 | ||
304 | #define qcrypto_block_luks_ivgen_name_lookup(name, errp) \ | |
305 | qcrypto_block_luks_name_lookup(name, \ | |
f7abe0ec | 306 | &QCryptoIVGenAlgorithm_lookup, \ |
3e308f20 DB |
307 | "IV generator", \ |
308 | errp) | |
309 | ||
310 | ||
311 | static bool | |
312 | qcrypto_block_luks_has_format(const uint8_t *buf, | |
313 | size_t buf_size) | |
314 | { | |
315 | const QCryptoBlockLUKSHeader *luks_header = (const void *)buf; | |
316 | ||
317 | if (buf_size >= offsetof(QCryptoBlockLUKSHeader, cipher_name) && | |
318 | memcmp(luks_header->magic, qcrypto_block_luks_magic, | |
319 | QCRYPTO_BLOCK_LUKS_MAGIC_LEN) == 0 && | |
320 | be16_to_cpu(luks_header->version) == QCRYPTO_BLOCK_LUKS_VERSION) { | |
321 | return true; | |
322 | } else { | |
323 | return false; | |
324 | } | |
325 | } | |
326 | ||
327 | ||
328 | /** | |
329 | * Deal with a quirk of dm-crypt usage of ESSIV. | |
330 | * | |
331 | * When calculating ESSIV IVs, the cipher length used by ESSIV | |
332 | * may be different from the cipher length used for the block | |
333 | * encryption, becauses dm-crypt uses the hash digest length | |
334 | * as the key size. ie, if you have AES 128 as the block cipher | |
335 | * and SHA 256 as ESSIV hash, then ESSIV will use AES 256 as | |
336 | * the cipher since that gets a key length matching the digest | |
337 | * size, not AES 128 with truncated digest as might be imagined | |
338 | */ | |
339 | static QCryptoCipherAlgorithm | |
340 | qcrypto_block_luks_essiv_cipher(QCryptoCipherAlgorithm cipher, | |
341 | QCryptoHashAlgorithm hash, | |
342 | Error **errp) | |
343 | { | |
344 | size_t digestlen = qcrypto_hash_digest_len(hash); | |
345 | size_t keylen = qcrypto_cipher_get_key_len(cipher); | |
346 | if (digestlen == keylen) { | |
347 | return cipher; | |
348 | } | |
349 | ||
350 | switch (cipher) { | |
351 | case QCRYPTO_CIPHER_ALG_AES_128: | |
352 | case QCRYPTO_CIPHER_ALG_AES_192: | |
353 | case QCRYPTO_CIPHER_ALG_AES_256: | |
354 | if (digestlen == qcrypto_cipher_get_key_len( | |
355 | QCRYPTO_CIPHER_ALG_AES_128)) { | |
356 | return QCRYPTO_CIPHER_ALG_AES_128; | |
357 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
358 | QCRYPTO_CIPHER_ALG_AES_192)) { | |
359 | return QCRYPTO_CIPHER_ALG_AES_192; | |
360 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
361 | QCRYPTO_CIPHER_ALG_AES_256)) { | |
362 | return QCRYPTO_CIPHER_ALG_AES_256; | |
363 | } else { | |
364 | error_setg(errp, "No AES cipher with key size %zu available", | |
365 | digestlen); | |
366 | return 0; | |
367 | } | |
368 | break; | |
369 | case QCRYPTO_CIPHER_ALG_SERPENT_128: | |
370 | case QCRYPTO_CIPHER_ALG_SERPENT_192: | |
371 | case QCRYPTO_CIPHER_ALG_SERPENT_256: | |
372 | if (digestlen == qcrypto_cipher_get_key_len( | |
373 | QCRYPTO_CIPHER_ALG_SERPENT_128)) { | |
374 | return QCRYPTO_CIPHER_ALG_SERPENT_128; | |
375 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
376 | QCRYPTO_CIPHER_ALG_SERPENT_192)) { | |
377 | return QCRYPTO_CIPHER_ALG_SERPENT_192; | |
378 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
379 | QCRYPTO_CIPHER_ALG_SERPENT_256)) { | |
380 | return QCRYPTO_CIPHER_ALG_SERPENT_256; | |
381 | } else { | |
382 | error_setg(errp, "No Serpent cipher with key size %zu available", | |
383 | digestlen); | |
384 | return 0; | |
385 | } | |
386 | break; | |
387 | case QCRYPTO_CIPHER_ALG_TWOFISH_128: | |
388 | case QCRYPTO_CIPHER_ALG_TWOFISH_192: | |
389 | case QCRYPTO_CIPHER_ALG_TWOFISH_256: | |
390 | if (digestlen == qcrypto_cipher_get_key_len( | |
391 | QCRYPTO_CIPHER_ALG_TWOFISH_128)) { | |
392 | return QCRYPTO_CIPHER_ALG_TWOFISH_128; | |
393 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
394 | QCRYPTO_CIPHER_ALG_TWOFISH_192)) { | |
395 | return QCRYPTO_CIPHER_ALG_TWOFISH_192; | |
396 | } else if (digestlen == qcrypto_cipher_get_key_len( | |
397 | QCRYPTO_CIPHER_ALG_TWOFISH_256)) { | |
398 | return QCRYPTO_CIPHER_ALG_TWOFISH_256; | |
399 | } else { | |
400 | error_setg(errp, "No Twofish cipher with key size %zu available", | |
401 | digestlen); | |
402 | return 0; | |
403 | } | |
404 | break; | |
405 | default: | |
406 | error_setg(errp, "Cipher %s not supported with essiv", | |
977c736f | 407 | QCryptoCipherAlgorithm_str(cipher)); |
3e308f20 DB |
408 | return 0; |
409 | } | |
410 | } | |
411 | ||
bd56a55a ML |
412 | /* |
413 | * Returns number of sectors needed to store the key material | |
414 | * given number of anti forensic stripes | |
415 | */ | |
416 | static int | |
417 | qcrypto_block_luks_splitkeylen_sectors(const QCryptoBlockLUKS *luks, | |
418 | unsigned int header_sectors, | |
419 | unsigned int stripes) | |
420 | { | |
421 | /* | |
422 | * This calculation doesn't match that shown in the spec, | |
423 | * but instead follows the cryptsetup implementation. | |
424 | */ | |
425 | ||
426 | size_t splitkeylen = luks->header.master_key_len * stripes; | |
427 | ||
428 | /* First align the key material size to block size*/ | |
429 | size_t splitkeylen_sectors = | |
430 | DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE); | |
431 | ||
432 | /* Then also align the key material size to the size of the header */ | |
433 | return ROUND_UP(splitkeylen_sectors, header_sectors); | |
434 | } | |
435 | ||
dde2c5af ML |
436 | /* |
437 | * Stores the main LUKS header, taking care of endianess | |
438 | */ | |
439 | static int | |
440 | qcrypto_block_luks_store_header(QCryptoBlock *block, | |
441 | QCryptoBlockWriteFunc writefunc, | |
442 | void *opaque, | |
443 | Error **errp) | |
444 | { | |
445 | const QCryptoBlockLUKS *luks = block->opaque; | |
446 | Error *local_err = NULL; | |
447 | size_t i; | |
448 | g_autofree QCryptoBlockLUKSHeader *hdr_copy = NULL; | |
449 | ||
450 | /* Create a copy of the header */ | |
451 | hdr_copy = g_new0(QCryptoBlockLUKSHeader, 1); | |
452 | memcpy(hdr_copy, &luks->header, sizeof(QCryptoBlockLUKSHeader)); | |
453 | ||
454 | /* | |
455 | * Everything on disk uses Big Endian (tm), so flip header fields | |
456 | * before writing them | |
457 | */ | |
458 | cpu_to_be16s(&hdr_copy->version); | |
459 | cpu_to_be32s(&hdr_copy->payload_offset_sector); | |
460 | cpu_to_be32s(&hdr_copy->master_key_len); | |
461 | cpu_to_be32s(&hdr_copy->master_key_iterations); | |
462 | ||
463 | for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { | |
464 | cpu_to_be32s(&hdr_copy->key_slots[i].active); | |
465 | cpu_to_be32s(&hdr_copy->key_slots[i].iterations); | |
466 | cpu_to_be32s(&hdr_copy->key_slots[i].key_offset_sector); | |
467 | cpu_to_be32s(&hdr_copy->key_slots[i].stripes); | |
468 | } | |
469 | ||
470 | /* Write out the partition header and key slot headers */ | |
471 | writefunc(block, 0, (const uint8_t *)hdr_copy, sizeof(*hdr_copy), | |
472 | opaque, &local_err); | |
473 | ||
474 | if (local_err) { | |
475 | error_propagate(errp, local_err); | |
476 | return -1; | |
477 | } | |
478 | return 0; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Loads the main LUKS header,and byteswaps it to native endianess | |
483 | * And run basic sanity checks on it | |
484 | */ | |
485 | static int | |
486 | qcrypto_block_luks_load_header(QCryptoBlock *block, | |
487 | QCryptoBlockReadFunc readfunc, | |
488 | void *opaque, | |
489 | Error **errp) | |
490 | { | |
491 | ssize_t rv; | |
492 | size_t i; | |
493 | QCryptoBlockLUKS *luks = block->opaque; | |
494 | ||
495 | /* | |
496 | * Read the entire LUKS header, minus the key material from | |
497 | * the underlying device | |
498 | */ | |
499 | rv = readfunc(block, 0, | |
500 | (uint8_t *)&luks->header, | |
501 | sizeof(luks->header), | |
502 | opaque, | |
503 | errp); | |
504 | if (rv < 0) { | |
505 | return rv; | |
506 | } | |
507 | ||
508 | /* | |
509 | * The header is always stored in big-endian format, so | |
510 | * convert everything to native | |
511 | */ | |
512 | be16_to_cpus(&luks->header.version); | |
513 | be32_to_cpus(&luks->header.payload_offset_sector); | |
514 | be32_to_cpus(&luks->header.master_key_len); | |
515 | be32_to_cpus(&luks->header.master_key_iterations); | |
516 | ||
517 | for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { | |
518 | be32_to_cpus(&luks->header.key_slots[i].active); | |
519 | be32_to_cpus(&luks->header.key_slots[i].iterations); | |
520 | be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); | |
521 | be32_to_cpus(&luks->header.key_slots[i].stripes); | |
522 | } | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
9fa9c1c2 ML |
527 | /* |
528 | * Does basic sanity checks on the LUKS header | |
529 | */ | |
530 | static int | |
531 | qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp) | |
532 | { | |
533 | if (memcmp(luks->header.magic, qcrypto_block_luks_magic, | |
534 | QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { | |
535 | error_setg(errp, "Volume is not in LUKS format"); | |
536 | return -1; | |
537 | } | |
538 | ||
539 | if (luks->header.version != QCRYPTO_BLOCK_LUKS_VERSION) { | |
540 | error_setg(errp, "LUKS version %" PRIu32 " is not supported", | |
541 | luks->header.version); | |
542 | return -1; | |
543 | } | |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Parses the crypto parameters that are stored in the LUKS header | |
549 | */ | |
550 | ||
551 | static int | |
552 | qcrypto_block_luks_parse_header(QCryptoBlockLUKS *luks, Error **errp) | |
553 | { | |
554 | g_autofree char *cipher_mode = g_strdup(luks->header.cipher_mode); | |
555 | char *ivgen_name, *ivhash_name; | |
556 | Error *local_err = NULL; | |
557 | ||
558 | /* | |
559 | * The cipher_mode header contains a string that we have | |
560 | * to further parse, of the format | |
561 | * | |
562 | * <cipher-mode>-<iv-generator>[:<iv-hash>] | |
563 | * | |
564 | * eg cbc-essiv:sha256, cbc-plain64 | |
565 | */ | |
566 | ivgen_name = strchr(cipher_mode, '-'); | |
567 | if (!ivgen_name) { | |
568 | error_setg(errp, "Unexpected cipher mode string format %s", | |
569 | luks->header.cipher_mode); | |
570 | return -1; | |
571 | } | |
572 | *ivgen_name = '\0'; | |
573 | ivgen_name++; | |
574 | ||
575 | ivhash_name = strchr(ivgen_name, ':'); | |
576 | if (!ivhash_name) { | |
577 | luks->ivgen_hash_alg = 0; | |
578 | } else { | |
579 | *ivhash_name = '\0'; | |
580 | ivhash_name++; | |
581 | ||
582 | luks->ivgen_hash_alg = qcrypto_block_luks_hash_name_lookup(ivhash_name, | |
583 | &local_err); | |
584 | if (local_err) { | |
585 | error_propagate(errp, local_err); | |
586 | return -1; | |
587 | } | |
588 | } | |
589 | ||
590 | luks->cipher_mode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, | |
591 | &local_err); | |
592 | if (local_err) { | |
593 | error_propagate(errp, local_err); | |
594 | return -1; | |
595 | } | |
596 | ||
597 | luks->cipher_alg = | |
598 | qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, | |
599 | luks->cipher_mode, | |
600 | luks->header.master_key_len, | |
601 | &local_err); | |
602 | if (local_err) { | |
603 | error_propagate(errp, local_err); | |
604 | return -1; | |
605 | } | |
606 | ||
607 | luks->hash_alg = | |
608 | qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, | |
609 | &local_err); | |
610 | if (local_err) { | |
611 | error_propagate(errp, local_err); | |
612 | return -1; | |
613 | } | |
614 | ||
615 | luks->ivgen_alg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, | |
616 | &local_err); | |
617 | if (local_err) { | |
618 | error_propagate(errp, local_err); | |
619 | return -1; | |
620 | } | |
621 | ||
622 | if (luks->ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { | |
623 | if (!ivhash_name) { | |
624 | error_setg(errp, "Missing IV generator hash specification"); | |
625 | return -1; | |
626 | } | |
627 | luks->ivgen_cipher_alg = | |
628 | qcrypto_block_luks_essiv_cipher(luks->cipher_alg, | |
629 | luks->ivgen_hash_alg, | |
630 | &local_err); | |
631 | if (local_err) { | |
632 | error_propagate(errp, local_err); | |
633 | return -1; | |
634 | } | |
635 | } else { | |
636 | ||
637 | /* | |
638 | * Note we parsed the ivhash_name earlier in the cipher_mode | |
639 | * spec string even with plain/plain64 ivgens, but we | |
640 | * will ignore it, since it is irrelevant for these ivgens. | |
641 | * This is for compat with dm-crypt which will silently | |
642 | * ignore hash names with these ivgens rather than report | |
643 | * an error about the invalid usage | |
644 | */ | |
645 | luks->ivgen_cipher_alg = luks->cipher_alg; | |
646 | } | |
647 | return 0; | |
648 | } | |
649 | ||
3994a7c9 ML |
650 | /* |
651 | * Given a key slot, user password, and the master key, | |
652 | * will store the encrypted master key there, and update the | |
653 | * in-memory header. User must then write the in-memory header | |
654 | * | |
655 | * Returns: | |
656 | * 0 if the keyslot was written successfully | |
657 | * with the provided password | |
658 | * -1 if a fatal error occurred while storing the key | |
659 | */ | |
660 | static int | |
661 | qcrypto_block_luks_store_key(QCryptoBlock *block, | |
662 | unsigned int slot_idx, | |
663 | const char *password, | |
664 | uint8_t *masterkey, | |
665 | uint64_t iter_time, | |
666 | QCryptoBlockWriteFunc writefunc, | |
667 | void *opaque, | |
668 | Error **errp) | |
669 | { | |
670 | QCryptoBlockLUKS *luks = block->opaque; | |
671 | QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[slot_idx]; | |
672 | g_autofree uint8_t *splitkey = NULL; | |
673 | size_t splitkeylen; | |
674 | g_autofree uint8_t *slotkey = NULL; | |
675 | g_autoptr(QCryptoCipher) cipher = NULL; | |
676 | g_autoptr(QCryptoIVGen) ivgen = NULL; | |
677 | Error *local_err = NULL; | |
678 | uint64_t iters; | |
679 | int ret = -1; | |
680 | ||
681 | if (qcrypto_random_bytes(slot->salt, | |
682 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
683 | errp) < 0) { | |
684 | goto cleanup; | |
685 | } | |
686 | ||
687 | splitkeylen = luks->header.master_key_len * slot->stripes; | |
688 | ||
689 | /* | |
690 | * Determine how many iterations are required to | |
691 | * hash the user password while consuming 1 second of compute | |
692 | * time | |
693 | */ | |
694 | iters = qcrypto_pbkdf2_count_iters(luks->hash_alg, | |
695 | (uint8_t *)password, strlen(password), | |
696 | slot->salt, | |
697 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
698 | luks->header.master_key_len, | |
699 | &local_err); | |
700 | if (local_err) { | |
701 | error_propagate(errp, local_err); | |
702 | goto cleanup; | |
703 | } | |
704 | ||
705 | if (iters > (ULLONG_MAX / iter_time)) { | |
706 | error_setg_errno(errp, ERANGE, | |
707 | "PBKDF iterations %llu too large to scale", | |
708 | (unsigned long long)iters); | |
709 | goto cleanup; | |
710 | } | |
711 | ||
712 | /* iter_time was in millis, but count_iters reported for secs */ | |
713 | iters = iters * iter_time / 1000; | |
714 | ||
715 | if (iters > UINT32_MAX) { | |
716 | error_setg_errno(errp, ERANGE, | |
717 | "PBKDF iterations %llu larger than %u", | |
718 | (unsigned long long)iters, UINT32_MAX); | |
719 | goto cleanup; | |
720 | } | |
721 | ||
722 | slot->iterations = | |
723 | MAX(iters, QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS); | |
724 | ||
725 | ||
726 | /* | |
727 | * Generate a key that we'll use to encrypt the master | |
728 | * key, from the user's password | |
729 | */ | |
730 | slotkey = g_new0(uint8_t, luks->header.master_key_len); | |
731 | if (qcrypto_pbkdf2(luks->hash_alg, | |
732 | (uint8_t *)password, strlen(password), | |
733 | slot->salt, | |
734 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
735 | slot->iterations, | |
736 | slotkey, luks->header.master_key_len, | |
737 | errp) < 0) { | |
738 | goto cleanup; | |
739 | } | |
740 | ||
741 | ||
742 | /* | |
743 | * Setup the encryption objects needed to encrypt the | |
744 | * master key material | |
745 | */ | |
746 | cipher = qcrypto_cipher_new(luks->cipher_alg, | |
747 | luks->cipher_mode, | |
748 | slotkey, luks->header.master_key_len, | |
749 | errp); | |
750 | if (!cipher) { | |
751 | goto cleanup; | |
752 | } | |
753 | ||
754 | ivgen = qcrypto_ivgen_new(luks->ivgen_alg, | |
755 | luks->ivgen_cipher_alg, | |
756 | luks->ivgen_hash_alg, | |
757 | slotkey, luks->header.master_key_len, | |
758 | errp); | |
759 | if (!ivgen) { | |
760 | goto cleanup; | |
761 | } | |
762 | ||
763 | /* | |
764 | * Before storing the master key, we need to vastly | |
765 | * increase its size, as protection against forensic | |
766 | * disk data recovery | |
767 | */ | |
768 | splitkey = g_new0(uint8_t, splitkeylen); | |
769 | ||
770 | if (qcrypto_afsplit_encode(luks->hash_alg, | |
771 | luks->header.master_key_len, | |
772 | slot->stripes, | |
773 | masterkey, | |
774 | splitkey, | |
775 | errp) < 0) { | |
776 | goto cleanup; | |
777 | } | |
778 | ||
779 | /* | |
780 | * Now we encrypt the split master key with the key generated | |
781 | * from the user's password, before storing it | |
782 | */ | |
783 | if (qcrypto_block_cipher_encrypt_helper(cipher, block->niv, ivgen, | |
784 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, | |
785 | 0, | |
786 | splitkey, | |
787 | splitkeylen, | |
788 | errp) < 0) { | |
789 | goto cleanup; | |
790 | } | |
791 | ||
792 | /* Write out the slot's master key material. */ | |
793 | if (writefunc(block, | |
794 | slot->key_offset_sector * | |
795 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, | |
796 | splitkey, splitkeylen, | |
797 | opaque, | |
798 | errp) != splitkeylen) { | |
799 | goto cleanup; | |
800 | } | |
801 | ||
802 | slot->active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED; | |
803 | ||
804 | if (qcrypto_block_luks_store_header(block, writefunc, opaque, errp) < 0) { | |
805 | goto cleanup; | |
806 | } | |
807 | ||
808 | ret = 0; | |
809 | ||
810 | cleanup: | |
811 | if (slotkey) { | |
812 | memset(slotkey, 0, luks->header.master_key_len); | |
813 | } | |
814 | if (splitkey) { | |
815 | memset(splitkey, 0, splitkeylen); | |
816 | } | |
817 | return ret; | |
818 | } | |
819 | ||
3e308f20 DB |
820 | /* |
821 | * Given a key slot, and user password, this will attempt to unlock | |
822 | * the master encryption key from the key slot. | |
823 | * | |
824 | * Returns: | |
825 | * 0 if the key slot is disabled, or key could not be decrypted | |
826 | * with the provided password | |
827 | * 1 if the key slot is enabled, and key decrypted successfully | |
828 | * with the provided password | |
829 | * -1 if a fatal error occurred loading the key | |
830 | */ | |
831 | static int | |
832 | qcrypto_block_luks_load_key(QCryptoBlock *block, | |
7e60a6f5 | 833 | size_t slot_idx, |
3e308f20 | 834 | const char *password, |
3e308f20 | 835 | uint8_t *masterkey, |
3e308f20 DB |
836 | QCryptoBlockReadFunc readfunc, |
837 | void *opaque, | |
838 | Error **errp) | |
839 | { | |
840 | QCryptoBlockLUKS *luks = block->opaque; | |
7e60a6f5 | 841 | const QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[slot_idx]; |
57b9f113 | 842 | g_autofree uint8_t *splitkey = NULL; |
3e308f20 | 843 | size_t splitkeylen; |
57b9f113 | 844 | g_autofree uint8_t *possiblekey = NULL; |
3e308f20 | 845 | ssize_t rv; |
57b9f113 | 846 | g_autoptr(QCryptoCipher) cipher = NULL; |
3e308f20 | 847 | uint8_t keydigest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN]; |
57b9f113 | 848 | g_autoptr(QCryptoIVGen) ivgen = NULL; |
3e308f20 DB |
849 | size_t niv; |
850 | ||
851 | if (slot->active != QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED) { | |
852 | return 0; | |
853 | } | |
854 | ||
1ddd52e4 | 855 | splitkeylen = luks->header.master_key_len * slot->stripes; |
3e308f20 | 856 | splitkey = g_new0(uint8_t, splitkeylen); |
1ddd52e4 | 857 | possiblekey = g_new0(uint8_t, luks->header.master_key_len); |
3e308f20 DB |
858 | |
859 | /* | |
860 | * The user password is used to generate a (possible) | |
861 | * decryption key. This may or may not successfully | |
862 | * decrypt the master key - we just blindly assume | |
863 | * the key is correct and validate the results of | |
864 | * decryption later. | |
865 | */ | |
9d80e59d | 866 | if (qcrypto_pbkdf2(luks->hash_alg, |
3e308f20 DB |
867 | (const uint8_t *)password, strlen(password), |
868 | slot->salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
869 | slot->iterations, | |
1ddd52e4 | 870 | possiblekey, luks->header.master_key_len, |
3e308f20 | 871 | errp) < 0) { |
57b9f113 | 872 | return -1; |
3e308f20 DB |
873 | } |
874 | ||
875 | /* | |
876 | * We need to read the master key material from the | |
877 | * LUKS key material header. What we're reading is | |
878 | * not the raw master key, but rather the data after | |
879 | * it has been passed through AFSplit and the result | |
880 | * then encrypted. | |
881 | */ | |
882 | rv = readfunc(block, | |
f0d3c362 | 883 | slot->key_offset_sector * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, |
3e308f20 | 884 | splitkey, splitkeylen, |
e4a3507e | 885 | opaque, |
37509233 | 886 | errp); |
3e308f20 | 887 | if (rv < 0) { |
57b9f113 | 888 | return -1; |
3e308f20 DB |
889 | } |
890 | ||
891 | ||
892 | /* Setup the cipher/ivgen that we'll use to try to decrypt | |
893 | * the split master key material */ | |
9d80e59d ML |
894 | cipher = qcrypto_cipher_new(luks->cipher_alg, |
895 | luks->cipher_mode, | |
896 | possiblekey, | |
897 | luks->header.master_key_len, | |
3e308f20 DB |
898 | errp); |
899 | if (!cipher) { | |
57b9f113 | 900 | return -1; |
3e308f20 DB |
901 | } |
902 | ||
9d80e59d ML |
903 | niv = qcrypto_cipher_get_iv_len(luks->cipher_alg, |
904 | luks->cipher_mode); | |
905 | ||
906 | ivgen = qcrypto_ivgen_new(luks->ivgen_alg, | |
907 | luks->ivgen_cipher_alg, | |
908 | luks->ivgen_hash_alg, | |
909 | possiblekey, | |
910 | luks->header.master_key_len, | |
3e308f20 DB |
911 | errp); |
912 | if (!ivgen) { | |
57b9f113 | 913 | return -1; |
3e308f20 DB |
914 | } |
915 | ||
916 | ||
917 | /* | |
918 | * The master key needs to be decrypted in the same | |
919 | * way that the block device payload will be decrypted | |
920 | * later. In particular we'll be using the IV generator | |
921 | * to reset the encryption cipher every time the master | |
922 | * key crosses a sector boundary. | |
923 | */ | |
0270417c VSO |
924 | if (qcrypto_block_cipher_decrypt_helper(cipher, |
925 | niv, | |
926 | ivgen, | |
927 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, | |
928 | 0, | |
929 | splitkey, | |
930 | splitkeylen, | |
931 | errp) < 0) { | |
57b9f113 | 932 | return -1; |
3e308f20 DB |
933 | } |
934 | ||
935 | /* | |
936 | * Now we've decrypted the split master key, join | |
937 | * it back together to get the actual master key. | |
938 | */ | |
9d80e59d | 939 | if (qcrypto_afsplit_decode(luks->hash_alg, |
1ddd52e4 | 940 | luks->header.master_key_len, |
3e308f20 DB |
941 | slot->stripes, |
942 | splitkey, | |
943 | masterkey, | |
944 | errp) < 0) { | |
57b9f113 | 945 | return -1; |
3e308f20 DB |
946 | } |
947 | ||
948 | ||
949 | /* | |
950 | * We still don't know that the masterkey we got is valid, | |
951 | * because we just blindly assumed the user's password | |
952 | * was correct. This is where we now verify it. We are | |
953 | * creating a hash of the master key using PBKDF and | |
954 | * then comparing that to the hash stored in the key slot | |
955 | * header | |
956 | */ | |
9d80e59d | 957 | if (qcrypto_pbkdf2(luks->hash_alg, |
1ddd52e4 ML |
958 | masterkey, |
959 | luks->header.master_key_len, | |
3e308f20 DB |
960 | luks->header.master_key_salt, |
961 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
962 | luks->header.master_key_iterations, | |
1ddd52e4 ML |
963 | keydigest, |
964 | G_N_ELEMENTS(keydigest), | |
3e308f20 | 965 | errp) < 0) { |
57b9f113 | 966 | return -1; |
3e308f20 DB |
967 | } |
968 | ||
969 | if (memcmp(keydigest, luks->header.master_key_digest, | |
970 | QCRYPTO_BLOCK_LUKS_DIGEST_LEN) == 0) { | |
971 | /* Success, we got the right master key */ | |
57b9f113 | 972 | return 1; |
3e308f20 DB |
973 | } |
974 | ||
975 | /* Fail, user's password was not valid for this key slot, | |
976 | * tell caller to try another slot */ | |
57b9f113 | 977 | return 0; |
3e308f20 DB |
978 | } |
979 | ||
980 | ||
981 | /* | |
982 | * Given a user password, this will iterate over all key | |
983 | * slots and try to unlock each active key slot using the | |
984 | * password until it successfully obtains a master key. | |
985 | * | |
986 | * Returns 0 if a key was loaded, -1 if no keys could be loaded | |
987 | */ | |
988 | static int | |
989 | qcrypto_block_luks_find_key(QCryptoBlock *block, | |
990 | const char *password, | |
1ddd52e4 | 991 | uint8_t *masterkey, |
3e308f20 DB |
992 | QCryptoBlockReadFunc readfunc, |
993 | void *opaque, | |
994 | Error **errp) | |
995 | { | |
3e308f20 DB |
996 | size_t i; |
997 | int rv; | |
998 | ||
3e308f20 DB |
999 | for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { |
1000 | rv = qcrypto_block_luks_load_key(block, | |
7e60a6f5 | 1001 | i, |
3e308f20 | 1002 | password, |
1ddd52e4 | 1003 | masterkey, |
3e308f20 DB |
1004 | readfunc, |
1005 | opaque, | |
1006 | errp); | |
1007 | if (rv < 0) { | |
1008 | goto error; | |
1009 | } | |
1010 | if (rv == 1) { | |
1011 | return 0; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | error_setg(errp, "Invalid password, cannot unlock any keyslot"); | |
3e308f20 | 1016 | error: |
3e308f20 DB |
1017 | return -1; |
1018 | } | |
1019 | ||
1020 | ||
1021 | static int | |
1022 | qcrypto_block_luks_open(QCryptoBlock *block, | |
1023 | QCryptoBlockOpenOptions *options, | |
1cd9a787 | 1024 | const char *optprefix, |
3e308f20 DB |
1025 | QCryptoBlockReadFunc readfunc, |
1026 | void *opaque, | |
1027 | unsigned int flags, | |
c972fa12 | 1028 | size_t n_threads, |
3e308f20 DB |
1029 | Error **errp) |
1030 | { | |
9d80e59d | 1031 | QCryptoBlockLUKS *luks = NULL; |
57b9f113 | 1032 | g_autofree uint8_t *masterkey = NULL; |
57b9f113 | 1033 | g_autofree char *password = NULL; |
3e308f20 DB |
1034 | |
1035 | if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { | |
1036 | if (!options->u.luks.key_secret) { | |
1cd9a787 DB |
1037 | error_setg(errp, "Parameter '%skey-secret' is required for cipher", |
1038 | optprefix ? optprefix : ""); | |
3e308f20 DB |
1039 | return -1; |
1040 | } | |
1041 | password = qcrypto_secret_lookup_as_utf8( | |
1042 | options->u.luks.key_secret, errp); | |
1043 | if (!password) { | |
1044 | return -1; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | luks = g_new0(QCryptoBlockLUKS, 1); | |
1049 | block->opaque = luks; | |
1050 | ||
dde2c5af | 1051 | if (qcrypto_block_luks_load_header(block, readfunc, opaque, errp) < 0) { |
3e308f20 DB |
1052 | goto fail; |
1053 | } | |
1054 | ||
9fa9c1c2 | 1055 | if (qcrypto_block_luks_check_header(luks, errp) < 0) { |
3e308f20 DB |
1056 | goto fail; |
1057 | } | |
1058 | ||
9fa9c1c2 | 1059 | if (qcrypto_block_luks_parse_header(luks, errp) < 0) { |
3e308f20 DB |
1060 | goto fail; |
1061 | } | |
3e308f20 DB |
1062 | |
1063 | if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { | |
1064 | /* Try to find which key slot our password is valid for | |
1065 | * and unlock the master key from that slot. | |
1066 | */ | |
1ddd52e4 ML |
1067 | |
1068 | masterkey = g_new0(uint8_t, luks->header.master_key_len); | |
1069 | ||
3e308f20 DB |
1070 | if (qcrypto_block_luks_find_key(block, |
1071 | password, | |
1ddd52e4 | 1072 | masterkey, |
3e308f20 DB |
1073 | readfunc, opaque, |
1074 | errp) < 0) { | |
3e308f20 DB |
1075 | goto fail; |
1076 | } | |
1077 | ||
1078 | /* We have a valid master key now, so can setup the | |
1079 | * block device payload decryption objects | |
1080 | */ | |
9d80e59d ML |
1081 | block->kdfhash = luks->hash_alg; |
1082 | block->niv = qcrypto_cipher_get_iv_len(luks->cipher_alg, | |
1083 | luks->cipher_mode); | |
1084 | ||
1085 | block->ivgen = qcrypto_ivgen_new(luks->ivgen_alg, | |
1086 | luks->ivgen_cipher_alg, | |
1087 | luks->ivgen_hash_alg, | |
1ddd52e4 ML |
1088 | masterkey, |
1089 | luks->header.master_key_len, | |
3e308f20 DB |
1090 | errp); |
1091 | if (!block->ivgen) { | |
3e308f20 DB |
1092 | goto fail; |
1093 | } | |
1094 | ||
61dd8a9a ML |
1095 | if (qcrypto_block_init_cipher(block, |
1096 | luks->cipher_alg, | |
1097 | luks->cipher_mode, | |
1098 | masterkey, | |
1099 | luks->header.master_key_len, | |
1100 | n_threads, | |
1101 | errp) < 0) { | |
3e308f20 DB |
1102 | goto fail; |
1103 | } | |
1104 | } | |
1105 | ||
850f49de | 1106 | block->sector_size = QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; |
f0d3c362 | 1107 | block->payload_offset = luks->header.payload_offset_sector * |
850f49de | 1108 | block->sector_size; |
3e308f20 | 1109 | |
3e308f20 DB |
1110 | return 0; |
1111 | ||
1112 | fail: | |
c972fa12 | 1113 | qcrypto_block_free_cipher(block); |
3e308f20 DB |
1114 | qcrypto_ivgen_free(block->ivgen); |
1115 | g_free(luks); | |
61dd8a9a | 1116 | return -1; |
3e308f20 DB |
1117 | } |
1118 | ||
1119 | ||
2ef950f9 FZ |
1120 | static void |
1121 | qcrypto_block_luks_uuid_gen(uint8_t *uuidstr) | |
3e308f20 | 1122 | { |
2ef950f9 FZ |
1123 | QemuUUID uuid; |
1124 | qemu_uuid_generate(&uuid); | |
1125 | qemu_uuid_unparse(&uuid, (char *)uuidstr); | |
3e308f20 DB |
1126 | } |
1127 | ||
1128 | static int | |
1129 | qcrypto_block_luks_create(QCryptoBlock *block, | |
1130 | QCryptoBlockCreateOptions *options, | |
1cd9a787 | 1131 | const char *optprefix, |
3e308f20 DB |
1132 | QCryptoBlockInitFunc initfunc, |
1133 | QCryptoBlockWriteFunc writefunc, | |
1134 | void *opaque, | |
1135 | Error **errp) | |
1136 | { | |
1137 | QCryptoBlockLUKS *luks; | |
1138 | QCryptoBlockCreateOptionsLUKS luks_opts; | |
1139 | Error *local_err = NULL; | |
57b9f113 | 1140 | g_autofree uint8_t *masterkey = NULL; |
bd56a55a ML |
1141 | size_t header_sectors; |
1142 | size_t split_key_sectors; | |
3e308f20 | 1143 | size_t i; |
57b9f113 | 1144 | g_autofree char *password = NULL; |
3e308f20 DB |
1145 | const char *cipher_alg; |
1146 | const char *cipher_mode; | |
1147 | const char *ivgen_alg; | |
1148 | const char *ivgen_hash_alg = NULL; | |
1149 | const char *hash_alg; | |
57b9f113 | 1150 | g_autofree char *cipher_mode_spec = NULL; |
59b060be | 1151 | uint64_t iters; |
3e308f20 DB |
1152 | |
1153 | memcpy(&luks_opts, &options->u.luks, sizeof(luks_opts)); | |
3bd18890 | 1154 | if (!luks_opts.has_iter_time) { |
2ab66cd5 | 1155 | luks_opts.iter_time = 2000; |
3bd18890 | 1156 | } |
3e308f20 DB |
1157 | if (!luks_opts.has_cipher_alg) { |
1158 | luks_opts.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256; | |
1159 | } | |
1160 | if (!luks_opts.has_cipher_mode) { | |
1161 | luks_opts.cipher_mode = QCRYPTO_CIPHER_MODE_XTS; | |
1162 | } | |
1163 | if (!luks_opts.has_ivgen_alg) { | |
1164 | luks_opts.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64; | |
1165 | } | |
1166 | if (!luks_opts.has_hash_alg) { | |
1167 | luks_opts.hash_alg = QCRYPTO_HASH_ALG_SHA256; | |
1168 | } | |
8b7cdba3 DB |
1169 | if (luks_opts.ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { |
1170 | if (!luks_opts.has_ivgen_hash_alg) { | |
1171 | luks_opts.ivgen_hash_alg = QCRYPTO_HASH_ALG_SHA256; | |
1172 | luks_opts.has_ivgen_hash_alg = true; | |
1173 | } | |
1174 | } | |
9d80e59d ML |
1175 | |
1176 | luks = g_new0(QCryptoBlockLUKS, 1); | |
1177 | block->opaque = luks; | |
1178 | ||
1179 | luks->cipher_alg = luks_opts.cipher_alg; | |
1180 | luks->cipher_mode = luks_opts.cipher_mode; | |
1181 | luks->ivgen_alg = luks_opts.ivgen_alg; | |
1182 | luks->ivgen_hash_alg = luks_opts.ivgen_hash_alg; | |
1183 | luks->hash_alg = luks_opts.hash_alg; | |
1184 | ||
1185 | ||
8b7cdba3 DB |
1186 | /* Note we're allowing ivgen_hash_alg to be set even for |
1187 | * non-essiv iv generators that don't need a hash. It will | |
1188 | * be silently ignored, for compatibility with dm-crypt */ | |
3e308f20 DB |
1189 | |
1190 | if (!options->u.luks.key_secret) { | |
1cd9a787 DB |
1191 | error_setg(errp, "Parameter '%skey-secret' is required for cipher", |
1192 | optprefix ? optprefix : ""); | |
9d80e59d | 1193 | goto error; |
3e308f20 DB |
1194 | } |
1195 | password = qcrypto_secret_lookup_as_utf8(luks_opts.key_secret, errp); | |
1196 | if (!password) { | |
9d80e59d | 1197 | goto error; |
3e308f20 DB |
1198 | } |
1199 | ||
3e308f20 DB |
1200 | |
1201 | memcpy(luks->header.magic, qcrypto_block_luks_magic, | |
1202 | QCRYPTO_BLOCK_LUKS_MAGIC_LEN); | |
1203 | ||
1204 | /* We populate the header in native endianness initially and | |
1205 | * then convert everything to big endian just before writing | |
1206 | * it out to disk | |
1207 | */ | |
1208 | luks->header.version = QCRYPTO_BLOCK_LUKS_VERSION; | |
2ef950f9 | 1209 | qcrypto_block_luks_uuid_gen(luks->header.uuid); |
3e308f20 DB |
1210 | |
1211 | cipher_alg = qcrypto_block_luks_cipher_alg_lookup(luks_opts.cipher_alg, | |
1212 | errp); | |
1213 | if (!cipher_alg) { | |
1214 | goto error; | |
1215 | } | |
1216 | ||
977c736f MA |
1217 | cipher_mode = QCryptoCipherMode_str(luks_opts.cipher_mode); |
1218 | ivgen_alg = QCryptoIVGenAlgorithm_str(luks_opts.ivgen_alg); | |
3e308f20 | 1219 | if (luks_opts.has_ivgen_hash_alg) { |
977c736f | 1220 | ivgen_hash_alg = QCryptoHashAlgorithm_str(luks_opts.ivgen_hash_alg); |
3e308f20 DB |
1221 | cipher_mode_spec = g_strdup_printf("%s-%s:%s", cipher_mode, ivgen_alg, |
1222 | ivgen_hash_alg); | |
1223 | } else { | |
1224 | cipher_mode_spec = g_strdup_printf("%s-%s", cipher_mode, ivgen_alg); | |
1225 | } | |
977c736f | 1226 | hash_alg = QCryptoHashAlgorithm_str(luks_opts.hash_alg); |
3e308f20 DB |
1227 | |
1228 | ||
1229 | if (strlen(cipher_alg) >= QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN) { | |
1230 | error_setg(errp, "Cipher name '%s' is too long for LUKS header", | |
1231 | cipher_alg); | |
1232 | goto error; | |
1233 | } | |
1234 | if (strlen(cipher_mode_spec) >= QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN) { | |
1235 | error_setg(errp, "Cipher mode '%s' is too long for LUKS header", | |
1236 | cipher_mode_spec); | |
1237 | goto error; | |
1238 | } | |
1239 | if (strlen(hash_alg) >= QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN) { | |
1240 | error_setg(errp, "Hash name '%s' is too long for LUKS header", | |
1241 | hash_alg); | |
1242 | goto error; | |
1243 | } | |
1244 | ||
1245 | if (luks_opts.ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { | |
9d80e59d ML |
1246 | luks->ivgen_cipher_alg = |
1247 | qcrypto_block_luks_essiv_cipher(luks_opts.cipher_alg, | |
1248 | luks_opts.ivgen_hash_alg, | |
1249 | &local_err); | |
3e308f20 DB |
1250 | if (local_err) { |
1251 | error_propagate(errp, local_err); | |
1252 | goto error; | |
1253 | } | |
1254 | } else { | |
9d80e59d | 1255 | luks->ivgen_cipher_alg = luks_opts.cipher_alg; |
3e308f20 DB |
1256 | } |
1257 | ||
1258 | strcpy(luks->header.cipher_name, cipher_alg); | |
1259 | strcpy(luks->header.cipher_mode, cipher_mode_spec); | |
1260 | strcpy(luks->header.hash_spec, hash_alg); | |
1261 | ||
f0d3c362 ML |
1262 | luks->header.master_key_len = |
1263 | qcrypto_cipher_get_key_len(luks_opts.cipher_alg); | |
1264 | ||
3e308f20 | 1265 | if (luks_opts.cipher_mode == QCRYPTO_CIPHER_MODE_XTS) { |
f0d3c362 | 1266 | luks->header.master_key_len *= 2; |
3e308f20 DB |
1267 | } |
1268 | ||
1269 | /* Generate the salt used for hashing the master key | |
1270 | * with PBKDF later | |
1271 | */ | |
1272 | if (qcrypto_random_bytes(luks->header.master_key_salt, | |
1273 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
1274 | errp) < 0) { | |
1275 | goto error; | |
1276 | } | |
1277 | ||
1278 | /* Generate random master key */ | |
f0d3c362 | 1279 | masterkey = g_new0(uint8_t, luks->header.master_key_len); |
3e308f20 | 1280 | if (qcrypto_random_bytes(masterkey, |
f0d3c362 | 1281 | luks->header.master_key_len, errp) < 0) { |
3e308f20 DB |
1282 | goto error; |
1283 | } | |
1284 | ||
1285 | ||
1286 | /* Setup the block device payload encryption objects */ | |
c972fa12 VSO |
1287 | if (qcrypto_block_init_cipher(block, luks_opts.cipher_alg, |
1288 | luks_opts.cipher_mode, masterkey, | |
f0d3c362 | 1289 | luks->header.master_key_len, 1, errp) < 0) { |
3e308f20 DB |
1290 | goto error; |
1291 | } | |
1292 | ||
1293 | block->kdfhash = luks_opts.hash_alg; | |
1294 | block->niv = qcrypto_cipher_get_iv_len(luks_opts.cipher_alg, | |
1295 | luks_opts.cipher_mode); | |
1296 | block->ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, | |
9d80e59d | 1297 | luks->ivgen_cipher_alg, |
3e308f20 | 1298 | luks_opts.ivgen_hash_alg, |
f0d3c362 | 1299 | masterkey, luks->header.master_key_len, |
3e308f20 DB |
1300 | errp); |
1301 | ||
1302 | if (!block->ivgen) { | |
1303 | goto error; | |
1304 | } | |
1305 | ||
1306 | ||
1307 | /* Determine how many iterations we need to hash the master | |
1308 | * key, in order to have 1 second of compute time used | |
1309 | */ | |
59b060be | 1310 | iters = qcrypto_pbkdf2_count_iters(luks_opts.hash_alg, |
f0d3c362 | 1311 | masterkey, luks->header.master_key_len, |
59b060be DB |
1312 | luks->header.master_key_salt, |
1313 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
e74aabcf | 1314 | QCRYPTO_BLOCK_LUKS_DIGEST_LEN, |
59b060be | 1315 | &local_err); |
3e308f20 DB |
1316 | if (local_err) { |
1317 | error_propagate(errp, local_err); | |
1318 | goto error; | |
1319 | } | |
1320 | ||
3bd18890 DB |
1321 | if (iters > (ULLONG_MAX / luks_opts.iter_time)) { |
1322 | error_setg_errno(errp, ERANGE, | |
1323 | "PBKDF iterations %llu too large to scale", | |
1324 | (unsigned long long)iters); | |
1325 | goto error; | |
1326 | } | |
1327 | ||
1328 | /* iter_time was in millis, but count_iters reported for secs */ | |
1329 | iters = iters * luks_opts.iter_time / 1000; | |
1330 | ||
3e308f20 DB |
1331 | /* Why /= 8 ? That matches cryptsetup, but there's no |
1332 | * explanation why they chose /= 8... Probably so that | |
1333 | * if all 8 keyslots are active we only spend 1 second | |
1334 | * in total time to check all keys */ | |
59b060be DB |
1335 | iters /= 8; |
1336 | if (iters > UINT32_MAX) { | |
1337 | error_setg_errno(errp, ERANGE, | |
1338 | "PBKDF iterations %llu larger than %u", | |
1339 | (unsigned long long)iters, UINT32_MAX); | |
1340 | goto error; | |
1341 | } | |
1342 | iters = MAX(iters, QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS); | |
1343 | luks->header.master_key_iterations = iters; | |
3e308f20 DB |
1344 | |
1345 | /* Hash the master key, saving the result in the LUKS | |
1346 | * header. This hash is used when opening the encrypted | |
1347 | * device to verify that the user password unlocked a | |
1348 | * valid master key | |
1349 | */ | |
1350 | if (qcrypto_pbkdf2(luks_opts.hash_alg, | |
f0d3c362 | 1351 | masterkey, luks->header.master_key_len, |
3e308f20 DB |
1352 | luks->header.master_key_salt, |
1353 | QCRYPTO_BLOCK_LUKS_SALT_LEN, | |
1354 | luks->header.master_key_iterations, | |
1355 | luks->header.master_key_digest, | |
1356 | QCRYPTO_BLOCK_LUKS_DIGEST_LEN, | |
1357 | errp) < 0) { | |
1358 | goto error; | |
1359 | } | |
1360 | ||
bd56a55a ML |
1361 | /* start with the sector that follows the header*/ |
1362 | header_sectors = QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / | |
1363 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; | |
1364 | ||
1365 | split_key_sectors = | |
1366 | qcrypto_block_luks_splitkeylen_sectors(luks, | |
1367 | header_sectors, | |
1368 | QCRYPTO_BLOCK_LUKS_STRIPES); | |
3e308f20 | 1369 | |
3e308f20 | 1370 | for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { |
bd56a55a ML |
1371 | QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[i]; |
1372 | slot->active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED; | |
3e308f20 | 1373 | |
bd56a55a ML |
1374 | slot->key_offset_sector = header_sectors + i * split_key_sectors; |
1375 | slot->stripes = QCRYPTO_BLOCK_LUKS_STRIPES; | |
3e308f20 DB |
1376 | } |
1377 | ||
3e308f20 DB |
1378 | /* The total size of the LUKS headers is the partition header + key |
1379 | * slot headers, rounded up to the nearest sector, combined with | |
1380 | * the size of each master key material region, also rounded up | |
1381 | * to the nearest sector */ | |
bd56a55a ML |
1382 | luks->header.payload_offset_sector = header_sectors + |
1383 | QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS * split_key_sectors; | |
3e308f20 | 1384 | |
850f49de | 1385 | block->sector_size = QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; |
f0d3c362 | 1386 | block->payload_offset = luks->header.payload_offset_sector * |
850f49de | 1387 | block->sector_size; |
3e308f20 DB |
1388 | |
1389 | /* Reserve header space to match payload offset */ | |
e4a3507e | 1390 | initfunc(block, block->payload_offset, opaque, &local_err); |
3e308f20 DB |
1391 | if (local_err) { |
1392 | error_propagate(errp, local_err); | |
1393 | goto error; | |
1394 | } | |
1395 | ||
3e308f20 | 1396 | |
3994a7c9 ML |
1397 | /* populate the slot 0 with the password encrypted master key*/ |
1398 | /* This will also store the header */ | |
1399 | if (qcrypto_block_luks_store_key(block, | |
1400 | 0, | |
1401 | password, | |
1402 | masterkey, | |
1403 | luks_opts.iter_time, | |
1404 | writefunc, | |
1405 | opaque, | |
1406 | errp) < 0) { | |
3e308f20 DB |
1407 | goto error; |
1408 | } | |
1409 | ||
f0d3c362 | 1410 | memset(masterkey, 0, luks->header.master_key_len); |
3e308f20 DB |
1411 | |
1412 | return 0; | |
1413 | ||
1414 | error: | |
1415 | if (masterkey) { | |
f0d3c362 | 1416 | memset(masterkey, 0, luks->header.master_key_len); |
3e308f20 | 1417 | } |
3e308f20 | 1418 | |
c972fa12 | 1419 | qcrypto_block_free_cipher(block); |
b640adca VSO |
1420 | qcrypto_ivgen_free(block->ivgen); |
1421 | ||
3e308f20 DB |
1422 | g_free(luks); |
1423 | return -1; | |
1424 | } | |
1425 | ||
1426 | ||
40c85028 DB |
1427 | static int qcrypto_block_luks_get_info(QCryptoBlock *block, |
1428 | QCryptoBlockInfo *info, | |
1429 | Error **errp) | |
1430 | { | |
1431 | QCryptoBlockLUKS *luks = block->opaque; | |
1432 | QCryptoBlockInfoLUKSSlot *slot; | |
1433 | QCryptoBlockInfoLUKSSlotList *slots = NULL, **prev = &info->u.luks.slots; | |
1434 | size_t i; | |
1435 | ||
1436 | info->u.luks.cipher_alg = luks->cipher_alg; | |
1437 | info->u.luks.cipher_mode = luks->cipher_mode; | |
1438 | info->u.luks.ivgen_alg = luks->ivgen_alg; | |
1439 | if (info->u.luks.ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { | |
1440 | info->u.luks.has_ivgen_hash_alg = true; | |
1441 | info->u.luks.ivgen_hash_alg = luks->ivgen_hash_alg; | |
1442 | } | |
1443 | info->u.luks.hash_alg = luks->hash_alg; | |
1444 | info->u.luks.payload_offset = block->payload_offset; | |
1445 | info->u.luks.master_key_iters = luks->header.master_key_iterations; | |
1446 | info->u.luks.uuid = g_strndup((const char *)luks->header.uuid, | |
1447 | sizeof(luks->header.uuid)); | |
1448 | ||
1449 | for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { | |
1450 | slots = g_new0(QCryptoBlockInfoLUKSSlotList, 1); | |
1451 | *prev = slots; | |
1452 | ||
1453 | slots->value = slot = g_new0(QCryptoBlockInfoLUKSSlot, 1); | |
1454 | slot->active = luks->header.key_slots[i].active == | |
1455 | QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED; | |
f0d3c362 | 1456 | slot->key_offset = luks->header.key_slots[i].key_offset_sector |
40c85028 DB |
1457 | * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; |
1458 | if (slot->active) { | |
1459 | slot->has_iters = true; | |
1460 | slot->iters = luks->header.key_slots[i].iterations; | |
1461 | slot->has_stripes = true; | |
1462 | slot->stripes = luks->header.key_slots[i].stripes; | |
1463 | } | |
1464 | ||
1465 | prev = &slots->next; | |
1466 | } | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | ||
3e308f20 DB |
1472 | static void qcrypto_block_luks_cleanup(QCryptoBlock *block) |
1473 | { | |
1474 | g_free(block->opaque); | |
1475 | } | |
1476 | ||
1477 | ||
1478 | static int | |
1479 | qcrypto_block_luks_decrypt(QCryptoBlock *block, | |
4609742a | 1480 | uint64_t offset, |
3e308f20 DB |
1481 | uint8_t *buf, |
1482 | size_t len, | |
1483 | Error **errp) | |
1484 | { | |
4609742a DB |
1485 | assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)); |
1486 | assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)); | |
0f0d596c VSO |
1487 | return qcrypto_block_decrypt_helper(block, |
1488 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, | |
1489 | offset, buf, len, errp); | |
3e308f20 DB |
1490 | } |
1491 | ||
1492 | ||
1493 | static int | |
1494 | qcrypto_block_luks_encrypt(QCryptoBlock *block, | |
4609742a | 1495 | uint64_t offset, |
3e308f20 DB |
1496 | uint8_t *buf, |
1497 | size_t len, | |
1498 | Error **errp) | |
1499 | { | |
4609742a DB |
1500 | assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)); |
1501 | assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)); | |
0f0d596c VSO |
1502 | return qcrypto_block_encrypt_helper(block, |
1503 | QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, | |
1504 | offset, buf, len, errp); | |
3e308f20 DB |
1505 | } |
1506 | ||
1507 | ||
1508 | const QCryptoBlockDriver qcrypto_block_driver_luks = { | |
1509 | .open = qcrypto_block_luks_open, | |
1510 | .create = qcrypto_block_luks_create, | |
40c85028 | 1511 | .get_info = qcrypto_block_luks_get_info, |
3e308f20 DB |
1512 | .cleanup = qcrypto_block_luks_cleanup, |
1513 | .decrypt = qcrypto_block_luks_decrypt, | |
1514 | .encrypt = qcrypto_block_luks_encrypt, | |
1515 | .has_format = qcrypto_block_luks_has_format, | |
1516 | }; |