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s390/zcrypt: Handle ep11 cprb return code
[thirdparty/kernel/linux.git] / drivers / s390 / crypto / zcrypt_ep11misc.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright IBM Corp. 2019
4 * Author(s): Harald Freudenberger <freude@linux.ibm.com>
5 *
6 * Collection of EP11 misc functions used by zcrypt and pkey
7 */
8
9 #define KMSG_COMPONENT "zcrypt"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/random.h>
16 #include <asm/zcrypt.h>
17 #include <asm/pkey.h>
18 #include <crypto/aes.h>
19
20 #include "ap_bus.h"
21 #include "zcrypt_api.h"
22 #include "zcrypt_debug.h"
23 #include "zcrypt_msgtype6.h"
24 #include "zcrypt_ep11misc.h"
25 #include "zcrypt_ccamisc.h"
26
27 #define EP11_PINBLOB_V1_BYTES 56
28
29 /* default iv used here */
30 static const u8 def_iv[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
31 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };
32
33 /* ep11 card info cache */
34 struct card_list_entry {
35 struct list_head list;
36 u16 cardnr;
37 struct ep11_card_info info;
38 };
39 static LIST_HEAD(card_list);
40 static DEFINE_SPINLOCK(card_list_lock);
41
42 static int card_cache_fetch(u16 cardnr, struct ep11_card_info *ci)
43 {
44 int rc = -ENOENT;
45 struct card_list_entry *ptr;
46
47 spin_lock_bh(&card_list_lock);
48 list_for_each_entry(ptr, &card_list, list) {
49 if (ptr->cardnr == cardnr) {
50 memcpy(ci, &ptr->info, sizeof(*ci));
51 rc = 0;
52 break;
53 }
54 }
55 spin_unlock_bh(&card_list_lock);
56
57 return rc;
58 }
59
60 static void card_cache_update(u16 cardnr, const struct ep11_card_info *ci)
61 {
62 int found = 0;
63 struct card_list_entry *ptr;
64
65 spin_lock_bh(&card_list_lock);
66 list_for_each_entry(ptr, &card_list, list) {
67 if (ptr->cardnr == cardnr) {
68 memcpy(&ptr->info, ci, sizeof(*ci));
69 found = 1;
70 break;
71 }
72 }
73 if (!found) {
74 ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
75 if (!ptr) {
76 spin_unlock_bh(&card_list_lock);
77 return;
78 }
79 ptr->cardnr = cardnr;
80 memcpy(&ptr->info, ci, sizeof(*ci));
81 list_add(&ptr->list, &card_list);
82 }
83 spin_unlock_bh(&card_list_lock);
84 }
85
86 static void card_cache_scrub(u16 cardnr)
87 {
88 struct card_list_entry *ptr;
89
90 spin_lock_bh(&card_list_lock);
91 list_for_each_entry(ptr, &card_list, list) {
92 if (ptr->cardnr == cardnr) {
93 list_del(&ptr->list);
94 kfree(ptr);
95 break;
96 }
97 }
98 spin_unlock_bh(&card_list_lock);
99 }
100
101 static void __exit card_cache_free(void)
102 {
103 struct card_list_entry *ptr, *pnext;
104
105 spin_lock_bh(&card_list_lock);
106 list_for_each_entry_safe(ptr, pnext, &card_list, list) {
107 list_del(&ptr->list);
108 kfree(ptr);
109 }
110 spin_unlock_bh(&card_list_lock);
111 }
112
113 static int ep11_kb_split(const u8 *kb, size_t kblen, u32 kbver,
114 struct ep11kblob_header **kbhdr, size_t *kbhdrsize,
115 u8 **kbpl, size_t *kbplsize)
116 {
117 struct ep11kblob_header *hdr = NULL;
118 size_t hdrsize, plsize = 0;
119 int rc = -EINVAL;
120 u8 *pl = NULL;
121
122 if (kblen < sizeof(struct ep11kblob_header))
123 goto out;
124 hdr = (struct ep11kblob_header *)kb;
125
126 switch (kbver) {
127 case TOKVER_EP11_AES:
128 /* header overlays the payload */
129 hdrsize = 0;
130 break;
131 case TOKVER_EP11_ECC_WITH_HEADER:
132 case TOKVER_EP11_AES_WITH_HEADER:
133 /* payload starts after the header */
134 hdrsize = sizeof(struct ep11kblob_header);
135 break;
136 default:
137 goto out;
138 }
139
140 plsize = kblen - hdrsize;
141 pl = (u8 *)kb + hdrsize;
142
143 if (kbhdr)
144 *kbhdr = hdr;
145 if (kbhdrsize)
146 *kbhdrsize = hdrsize;
147 if (kbpl)
148 *kbpl = pl;
149 if (kbplsize)
150 *kbplsize = plsize;
151
152 rc = 0;
153 out:
154 return rc;
155 }
156
157 static int ep11_kb_decode(const u8 *kb, size_t kblen,
158 struct ep11kblob_header **kbhdr, size_t *kbhdrsize,
159 struct ep11keyblob **kbpl, size_t *kbplsize)
160 {
161 struct ep11kblob_header *tmph, *hdr = NULL;
162 size_t hdrsize = 0, plsize = 0;
163 struct ep11keyblob *pl = NULL;
164 int rc = -EINVAL;
165 u8 *tmpp;
166
167 if (kblen < sizeof(struct ep11kblob_header))
168 goto out;
169 tmph = (struct ep11kblob_header *)kb;
170
171 if (tmph->type != TOKTYPE_NON_CCA &&
172 tmph->len > kblen)
173 goto out;
174
175 if (ep11_kb_split(kb, kblen, tmph->version,
176 &hdr, &hdrsize, &tmpp, &plsize))
177 goto out;
178
179 if (plsize < sizeof(struct ep11keyblob))
180 goto out;
181
182 if (!is_ep11_keyblob(tmpp))
183 goto out;
184
185 pl = (struct ep11keyblob *)tmpp;
186 plsize = hdr->len - hdrsize;
187
188 if (kbhdr)
189 *kbhdr = hdr;
190 if (kbhdrsize)
191 *kbhdrsize = hdrsize;
192 if (kbpl)
193 *kbpl = pl;
194 if (kbplsize)
195 *kbplsize = plsize;
196
197 rc = 0;
198 out:
199 return rc;
200 }
201
202 /*
203 * For valid ep11 keyblobs, returns a reference to the wrappingkey verification
204 * pattern. Otherwise NULL.
205 */
206 const u8 *ep11_kb_wkvp(const u8 *keyblob, size_t keybloblen)
207 {
208 struct ep11keyblob *kb;
209
210 if (ep11_kb_decode(keyblob, keybloblen, NULL, NULL, &kb, NULL))
211 return NULL;
212 return kb->wkvp;
213 }
214 EXPORT_SYMBOL(ep11_kb_wkvp);
215
216 /*
217 * Simple check if the key blob is a valid EP11 AES key blob with header.
218 */
219 int ep11_check_aes_key_with_hdr(debug_info_t *dbg, int dbflvl,
220 const u8 *key, size_t keylen, int checkcpacfexp)
221 {
222 struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
223 struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
224
225 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
226
227 if (keylen < sizeof(*hdr) + sizeof(*kb)) {
228 DBF("%s key check failed, keylen %zu < %zu\n",
229 __func__, keylen, sizeof(*hdr) + sizeof(*kb));
230 return -EINVAL;
231 }
232
233 if (hdr->type != TOKTYPE_NON_CCA) {
234 if (dbg)
235 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
236 __func__, (int)hdr->type, TOKTYPE_NON_CCA);
237 return -EINVAL;
238 }
239 if (hdr->hver != 0x00) {
240 if (dbg)
241 DBF("%s key check failed, header version 0x%02x != 0x00\n",
242 __func__, (int)hdr->hver);
243 return -EINVAL;
244 }
245 if (hdr->version != TOKVER_EP11_AES_WITH_HEADER) {
246 if (dbg)
247 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
248 __func__, (int)hdr->version, TOKVER_EP11_AES_WITH_HEADER);
249 return -EINVAL;
250 }
251 if (hdr->len > keylen) {
252 if (dbg)
253 DBF("%s key check failed, header len %d keylen %zu mismatch\n",
254 __func__, (int)hdr->len, keylen);
255 return -EINVAL;
256 }
257 if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
258 if (dbg)
259 DBF("%s key check failed, header len %d < %zu\n",
260 __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
261 return -EINVAL;
262 }
263
264 if (kb->version != EP11_STRUCT_MAGIC) {
265 if (dbg)
266 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
267 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
268 return -EINVAL;
269 }
270 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
271 if (dbg)
272 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
273 __func__);
274 return -EINVAL;
275 }
276
277 #undef DBF
278
279 return 0;
280 }
281 EXPORT_SYMBOL(ep11_check_aes_key_with_hdr);
282
283 /*
284 * Simple check if the key blob is a valid EP11 ECC key blob with header.
285 */
286 int ep11_check_ecc_key_with_hdr(debug_info_t *dbg, int dbflvl,
287 const u8 *key, size_t keylen, int checkcpacfexp)
288 {
289 struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
290 struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
291
292 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
293
294 if (keylen < sizeof(*hdr) + sizeof(*kb)) {
295 DBF("%s key check failed, keylen %zu < %zu\n",
296 __func__, keylen, sizeof(*hdr) + sizeof(*kb));
297 return -EINVAL;
298 }
299
300 if (hdr->type != TOKTYPE_NON_CCA) {
301 if (dbg)
302 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
303 __func__, (int)hdr->type, TOKTYPE_NON_CCA);
304 return -EINVAL;
305 }
306 if (hdr->hver != 0x00) {
307 if (dbg)
308 DBF("%s key check failed, header version 0x%02x != 0x00\n",
309 __func__, (int)hdr->hver);
310 return -EINVAL;
311 }
312 if (hdr->version != TOKVER_EP11_ECC_WITH_HEADER) {
313 if (dbg)
314 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
315 __func__, (int)hdr->version, TOKVER_EP11_ECC_WITH_HEADER);
316 return -EINVAL;
317 }
318 if (hdr->len > keylen) {
319 if (dbg)
320 DBF("%s key check failed, header len %d keylen %zu mismatch\n",
321 __func__, (int)hdr->len, keylen);
322 return -EINVAL;
323 }
324 if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
325 if (dbg)
326 DBF("%s key check failed, header len %d < %zu\n",
327 __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
328 return -EINVAL;
329 }
330
331 if (kb->version != EP11_STRUCT_MAGIC) {
332 if (dbg)
333 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
334 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
335 return -EINVAL;
336 }
337 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
338 if (dbg)
339 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
340 __func__);
341 return -EINVAL;
342 }
343
344 #undef DBF
345
346 return 0;
347 }
348 EXPORT_SYMBOL(ep11_check_ecc_key_with_hdr);
349
350 /*
351 * Simple check if the key blob is a valid EP11 AES key blob with
352 * the header in the session field (old style EP11 AES key).
353 */
354 int ep11_check_aes_key(debug_info_t *dbg, int dbflvl,
355 const u8 *key, size_t keylen, int checkcpacfexp)
356 {
357 struct ep11keyblob *kb = (struct ep11keyblob *)key;
358
359 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
360
361 if (keylen < sizeof(*kb)) {
362 DBF("%s key check failed, keylen %zu < %zu\n",
363 __func__, keylen, sizeof(*kb));
364 return -EINVAL;
365 }
366
367 if (kb->head.type != TOKTYPE_NON_CCA) {
368 if (dbg)
369 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
370 __func__, (int)kb->head.type, TOKTYPE_NON_CCA);
371 return -EINVAL;
372 }
373 if (kb->head.version != TOKVER_EP11_AES) {
374 if (dbg)
375 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
376 __func__, (int)kb->head.version, TOKVER_EP11_AES);
377 return -EINVAL;
378 }
379 if (kb->head.len > keylen) {
380 if (dbg)
381 DBF("%s key check failed, header len %d keylen %zu mismatch\n",
382 __func__, (int)kb->head.len, keylen);
383 return -EINVAL;
384 }
385 if (kb->head.len < sizeof(*kb)) {
386 if (dbg)
387 DBF("%s key check failed, header len %d < %zu\n",
388 __func__, (int)kb->head.len, sizeof(*kb));
389 return -EINVAL;
390 }
391
392 if (kb->version != EP11_STRUCT_MAGIC) {
393 if (dbg)
394 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
395 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
396 return -EINVAL;
397 }
398 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
399 if (dbg)
400 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
401 __func__);
402 return -EINVAL;
403 }
404
405 #undef DBF
406
407 return 0;
408 }
409 EXPORT_SYMBOL(ep11_check_aes_key);
410
411 /*
412 * Allocate and prepare ep11 cprb plus additional payload.
413 */
414 static inline struct ep11_cprb *alloc_cprb(size_t payload_len)
415 {
416 size_t len = sizeof(struct ep11_cprb) + payload_len;
417 struct ep11_cprb *cprb;
418
419 cprb = kzalloc(len, GFP_KERNEL);
420 if (!cprb)
421 return NULL;
422
423 cprb->cprb_len = sizeof(struct ep11_cprb);
424 cprb->cprb_ver_id = 0x04;
425 memcpy(cprb->func_id, "T4", 2);
426 cprb->ret_code = 0xFFFFFFFF;
427 cprb->payload_len = payload_len;
428
429 return cprb;
430 }
431
432 /*
433 * Some helper functions related to ASN1 encoding.
434 * Limited to length info <= 2 byte.
435 */
436
437 #define ASN1TAGLEN(x) (2 + (x) + ((x) > 127 ? 1 : 0) + ((x) > 255 ? 1 : 0))
438
439 static int asn1tag_write(u8 *ptr, u8 tag, const u8 *pvalue, u16 valuelen)
440 {
441 ptr[0] = tag;
442 if (valuelen > 255) {
443 ptr[1] = 0x82;
444 *((u16 *)(ptr + 2)) = valuelen;
445 memcpy(ptr + 4, pvalue, valuelen);
446 return 4 + valuelen;
447 }
448 if (valuelen > 127) {
449 ptr[1] = 0x81;
450 ptr[2] = (u8)valuelen;
451 memcpy(ptr + 3, pvalue, valuelen);
452 return 3 + valuelen;
453 }
454 ptr[1] = (u8)valuelen;
455 memcpy(ptr + 2, pvalue, valuelen);
456 return 2 + valuelen;
457 }
458
459 /* EP11 payload > 127 bytes starts with this struct */
460 struct pl_head {
461 u8 tag;
462 u8 lenfmt;
463 u16 len;
464 u8 func_tag;
465 u8 func_len;
466 u32 func;
467 u8 dom_tag;
468 u8 dom_len;
469 u32 dom;
470 } __packed;
471
472 /* prep ep11 payload head helper function */
473 static inline void prep_head(struct pl_head *h,
474 size_t pl_size, int api, int func)
475 {
476 h->tag = 0x30;
477 h->lenfmt = 0x82;
478 h->len = pl_size - 4;
479 h->func_tag = 0x04;
480 h->func_len = sizeof(u32);
481 h->func = (api << 16) + func;
482 h->dom_tag = 0x04;
483 h->dom_len = sizeof(u32);
484 }
485
486 /* prep urb helper function */
487 static inline void prep_urb(struct ep11_urb *u,
488 struct ep11_target_dev *t, int nt,
489 struct ep11_cprb *req, size_t req_len,
490 struct ep11_cprb *rep, size_t rep_len)
491 {
492 u->targets = (u8 __user *)t;
493 u->targets_num = nt;
494 u->req = (u8 __user *)req;
495 u->req_len = req_len;
496 u->resp = (u8 __user *)rep;
497 u->resp_len = rep_len;
498 }
499
500 /* Check ep11 reply payload, return 0 or suggested errno value. */
501 static int check_reply_pl(const u8 *pl, const char *func)
502 {
503 int len;
504 u32 ret;
505
506 /* start tag */
507 if (*pl++ != 0x30) {
508 ZCRYPT_DBF_ERR("%s reply start tag mismatch\n", func);
509 return -EIO;
510 }
511
512 /* payload length format */
513 if (*pl < 127) {
514 len = *pl;
515 pl++;
516 } else if (*pl == 0x81) {
517 pl++;
518 len = *pl;
519 pl++;
520 } else if (*pl == 0x82) {
521 pl++;
522 len = *((u16 *)pl);
523 pl += 2;
524 } else {
525 ZCRYPT_DBF_ERR("%s reply start tag lenfmt mismatch 0x%02hhx\n",
526 func, *pl);
527 return -EIO;
528 }
529
530 /* len should cover at least 3 fields with 32 bit value each */
531 if (len < 3 * 6) {
532 ZCRYPT_DBF_ERR("%s reply length %d too small\n", func, len);
533 return -EIO;
534 }
535
536 /* function tag, length and value */
537 if (pl[0] != 0x04 || pl[1] != 0x04) {
538 ZCRYPT_DBF_ERR("%s function tag or length mismatch\n", func);
539 return -EIO;
540 }
541 pl += 6;
542
543 /* dom tag, length and value */
544 if (pl[0] != 0x04 || pl[1] != 0x04) {
545 ZCRYPT_DBF_ERR("%s dom tag or length mismatch\n", func);
546 return -EIO;
547 }
548 pl += 6;
549
550 /* return value tag, length and value */
551 if (pl[0] != 0x04 || pl[1] != 0x04) {
552 ZCRYPT_DBF_ERR("%s return value tag or length mismatch\n",
553 func);
554 return -EIO;
555 }
556 pl += 2;
557 ret = *((u32 *)pl);
558 if (ret != 0) {
559 ZCRYPT_DBF_ERR("%s return value 0x%08x != 0\n", func, ret);
560 return -EIO;
561 }
562
563 return 0;
564 }
565
566 /* Check ep11 reply cprb, return 0 or suggested errno value. */
567 static int check_reply_cprb(const struct ep11_cprb *rep, const char *func)
568 {
569 /* check ep11 reply return code field */
570 if (rep->ret_code) {
571 ZCRYPT_DBF_ERR("%s ep11 reply ret_code=0x%08x\n", __func__,
572 rep->ret_code);
573 if (rep->ret_code == 0x000c0003)
574 return -EBUSY;
575 else
576 return -EIO;
577 }
578
579 return 0;
580 }
581
582 /*
583 * Helper function which does an ep11 query with given query type.
584 */
585 static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type,
586 size_t buflen, u8 *buf)
587 {
588 struct ep11_info_req_pl {
589 struct pl_head head;
590 u8 query_type_tag;
591 u8 query_type_len;
592 u32 query_type;
593 u8 query_subtype_tag;
594 u8 query_subtype_len;
595 u32 query_subtype;
596 } __packed * req_pl;
597 struct ep11_info_rep_pl {
598 struct pl_head head;
599 u8 rc_tag;
600 u8 rc_len;
601 u32 rc;
602 u8 data_tag;
603 u8 data_lenfmt;
604 u16 data_len;
605 } __packed * rep_pl;
606 struct ep11_cprb *req = NULL, *rep = NULL;
607 struct ep11_target_dev target;
608 struct ep11_urb *urb = NULL;
609 int api = EP11_API_V1, rc = -ENOMEM;
610
611 /* request cprb and payload */
612 req = alloc_cprb(sizeof(struct ep11_info_req_pl));
613 if (!req)
614 goto out;
615 req_pl = (struct ep11_info_req_pl *)(((u8 *)req) + sizeof(*req));
616 prep_head(&req_pl->head, sizeof(*req_pl), api, 38); /* get xcp info */
617 req_pl->query_type_tag = 0x04;
618 req_pl->query_type_len = sizeof(u32);
619 req_pl->query_type = query_type;
620 req_pl->query_subtype_tag = 0x04;
621 req_pl->query_subtype_len = sizeof(u32);
622
623 /* reply cprb and payload */
624 rep = alloc_cprb(sizeof(struct ep11_info_rep_pl) + buflen);
625 if (!rep)
626 goto out;
627 rep_pl = (struct ep11_info_rep_pl *)(((u8 *)rep) + sizeof(*rep));
628
629 /* urb and target */
630 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
631 if (!urb)
632 goto out;
633 target.ap_id = cardnr;
634 target.dom_id = domain;
635 prep_urb(urb, &target, 1,
636 req, sizeof(*req) + sizeof(*req_pl),
637 rep, sizeof(*rep) + sizeof(*rep_pl) + buflen);
638
639 rc = zcrypt_send_ep11_cprb(urb);
640 if (rc) {
641 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
642 __func__, (int)cardnr, (int)domain, rc);
643 goto out;
644 }
645
646 /* check ep11 reply cprb */
647 rc = check_reply_cprb(rep, __func__);
648 if (rc)
649 goto out;
650
651 /* check payload */
652 rc = check_reply_pl((u8 *)rep_pl, __func__);
653 if (rc)
654 goto out;
655 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
656 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
657 rc = -EIO;
658 goto out;
659 }
660 if (rep_pl->data_len > buflen) {
661 ZCRYPT_DBF_ERR("%s mismatch between reply data len and buffer len\n",
662 __func__);
663 rc = -ENOSPC;
664 goto out;
665 }
666
667 memcpy(buf, ((u8 *)rep_pl) + sizeof(*rep_pl), rep_pl->data_len);
668
669 out:
670 kfree(req);
671 kfree(rep);
672 kfree(urb);
673 return rc;
674 }
675
676 /*
677 * Provide information about an EP11 card.
678 */
679 int ep11_get_card_info(u16 card, struct ep11_card_info *info, int verify)
680 {
681 int rc;
682 struct ep11_module_query_info {
683 u32 API_ord_nr;
684 u32 firmware_id;
685 u8 FW_major_vers;
686 u8 FW_minor_vers;
687 u8 CSP_major_vers;
688 u8 CSP_minor_vers;
689 u8 fwid[32];
690 u8 xcp_config_hash[32];
691 u8 CSP_config_hash[32];
692 u8 serial[16];
693 u8 module_date_time[16];
694 u64 op_mode;
695 u32 PKCS11_flags;
696 u32 ext_flags;
697 u32 domains;
698 u32 sym_state_bytes;
699 u32 digest_state_bytes;
700 u32 pin_blob_bytes;
701 u32 SPKI_bytes;
702 u32 priv_key_blob_bytes;
703 u32 sym_blob_bytes;
704 u32 max_payload_bytes;
705 u32 CP_profile_bytes;
706 u32 max_CP_index;
707 } __packed * pmqi = NULL;
708
709 rc = card_cache_fetch(card, info);
710 if (rc || verify) {
711 pmqi = kmalloc(sizeof(*pmqi), GFP_KERNEL);
712 if (!pmqi)
713 return -ENOMEM;
714 rc = ep11_query_info(card, AUTOSEL_DOM,
715 0x01 /* module info query */,
716 sizeof(*pmqi), (u8 *)pmqi);
717 if (rc) {
718 if (rc == -ENODEV)
719 card_cache_scrub(card);
720 goto out;
721 }
722 memset(info, 0, sizeof(*info));
723 info->API_ord_nr = pmqi->API_ord_nr;
724 info->FW_version =
725 (pmqi->FW_major_vers << 8) + pmqi->FW_minor_vers;
726 memcpy(info->serial, pmqi->serial, sizeof(info->serial));
727 info->op_mode = pmqi->op_mode;
728 card_cache_update(card, info);
729 }
730
731 out:
732 kfree(pmqi);
733 return rc;
734 }
735 EXPORT_SYMBOL(ep11_get_card_info);
736
737 /*
738 * Provide information about a domain within an EP11 card.
739 */
740 int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info)
741 {
742 int rc;
743 struct ep11_domain_query_info {
744 u32 dom_index;
745 u8 cur_WK_VP[32];
746 u8 new_WK_VP[32];
747 u32 dom_flags;
748 u64 op_mode;
749 } __packed * p_dom_info;
750
751 p_dom_info = kmalloc(sizeof(*p_dom_info), GFP_KERNEL);
752 if (!p_dom_info)
753 return -ENOMEM;
754
755 rc = ep11_query_info(card, domain, 0x03 /* domain info query */,
756 sizeof(*p_dom_info), (u8 *)p_dom_info);
757 if (rc)
758 goto out;
759
760 memset(info, 0, sizeof(*info));
761 info->cur_wk_state = '0';
762 info->new_wk_state = '0';
763 if (p_dom_info->dom_flags & 0x10 /* left imprint mode */) {
764 if (p_dom_info->dom_flags & 0x02 /* cur wk valid */) {
765 info->cur_wk_state = '1';
766 memcpy(info->cur_wkvp, p_dom_info->cur_WK_VP, 32);
767 }
768 if (p_dom_info->dom_flags & 0x04 || /* new wk present */
769 p_dom_info->dom_flags & 0x08 /* new wk committed */) {
770 info->new_wk_state =
771 p_dom_info->dom_flags & 0x08 ? '2' : '1';
772 memcpy(info->new_wkvp, p_dom_info->new_WK_VP, 32);
773 }
774 }
775 info->op_mode = p_dom_info->op_mode;
776
777 out:
778 kfree(p_dom_info);
779 return rc;
780 }
781 EXPORT_SYMBOL(ep11_get_domain_info);
782
783 /*
784 * Default EP11 AES key generate attributes, used when no keygenflags given:
785 * XCP_BLOB_ENCRYPT | XCP_BLOB_DECRYPT | XCP_BLOB_PROTKEY_EXTRACTABLE
786 */
787 #define KEY_ATTR_DEFAULTS 0x00200c00
788
789 static int _ep11_genaeskey(u16 card, u16 domain,
790 u32 keybitsize, u32 keygenflags,
791 u8 *keybuf, size_t *keybufsize)
792 {
793 struct keygen_req_pl {
794 struct pl_head head;
795 u8 var_tag;
796 u8 var_len;
797 u32 var;
798 u8 keybytes_tag;
799 u8 keybytes_len;
800 u32 keybytes;
801 u8 mech_tag;
802 u8 mech_len;
803 u32 mech;
804 u8 attr_tag;
805 u8 attr_len;
806 u32 attr_header;
807 u32 attr_bool_mask;
808 u32 attr_bool_bits;
809 u32 attr_val_len_type;
810 u32 attr_val_len_value;
811 /* followed by empty pin tag or empty pinblob tag */
812 } __packed * req_pl;
813 struct keygen_rep_pl {
814 struct pl_head head;
815 u8 rc_tag;
816 u8 rc_len;
817 u32 rc;
818 u8 data_tag;
819 u8 data_lenfmt;
820 u16 data_len;
821 u8 data[512];
822 } __packed * rep_pl;
823 struct ep11_cprb *req = NULL, *rep = NULL;
824 size_t req_pl_size, pinblob_size = 0;
825 struct ep11_target_dev target;
826 struct ep11_urb *urb = NULL;
827 int api, rc = -ENOMEM;
828 u8 *p;
829
830 switch (keybitsize) {
831 case 128:
832 case 192:
833 case 256:
834 break;
835 default:
836 ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
837 __func__, keybitsize);
838 rc = -EINVAL;
839 goto out;
840 }
841
842 /* request cprb and payload */
843 api = (!keygenflags || keygenflags & 0x00200000) ?
844 EP11_API_V4 : EP11_API_V1;
845 if (ap_is_se_guest()) {
846 /*
847 * genkey within SE environment requires API ordinal 6
848 * with empty pinblob
849 */
850 api = EP11_API_V6;
851 pinblob_size = EP11_PINBLOB_V1_BYTES;
852 }
853 req_pl_size = sizeof(struct keygen_req_pl) + ASN1TAGLEN(pinblob_size);
854 req = alloc_cprb(req_pl_size);
855 if (!req)
856 goto out;
857 req_pl = (struct keygen_req_pl *)(((u8 *)req) + sizeof(*req));
858 prep_head(&req_pl->head, req_pl_size, api, 21); /* GenerateKey */
859 req_pl->var_tag = 0x04;
860 req_pl->var_len = sizeof(u32);
861 req_pl->keybytes_tag = 0x04;
862 req_pl->keybytes_len = sizeof(u32);
863 req_pl->keybytes = keybitsize / 8;
864 req_pl->mech_tag = 0x04;
865 req_pl->mech_len = sizeof(u32);
866 req_pl->mech = 0x00001080; /* CKM_AES_KEY_GEN */
867 req_pl->attr_tag = 0x04;
868 req_pl->attr_len = 5 * sizeof(u32);
869 req_pl->attr_header = 0x10010000;
870 req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
871 req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
872 req_pl->attr_val_len_type = 0x00000161; /* CKA_VALUE_LEN */
873 req_pl->attr_val_len_value = keybitsize / 8;
874 p = ((u8 *)req_pl) + sizeof(*req_pl);
875 /* pin tag */
876 *p++ = 0x04;
877 *p++ = pinblob_size;
878
879 /* reply cprb and payload */
880 rep = alloc_cprb(sizeof(struct keygen_rep_pl));
881 if (!rep)
882 goto out;
883 rep_pl = (struct keygen_rep_pl *)(((u8 *)rep) + sizeof(*rep));
884
885 /* urb and target */
886 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
887 if (!urb)
888 goto out;
889 target.ap_id = card;
890 target.dom_id = domain;
891 prep_urb(urb, &target, 1,
892 req, sizeof(*req) + req_pl_size,
893 rep, sizeof(*rep) + sizeof(*rep_pl));
894
895 rc = zcrypt_send_ep11_cprb(urb);
896 if (rc) {
897 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
898 __func__, (int)card, (int)domain, rc);
899 goto out;
900 }
901
902 /* check ep11 reply cprb */
903 rc = check_reply_cprb(rep, __func__);
904 if (rc)
905 goto out;
906
907 /* check payload */
908 rc = check_reply_pl((u8 *)rep_pl, __func__);
909 if (rc)
910 goto out;
911 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
912 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
913 rc = -EIO;
914 goto out;
915 }
916 if (rep_pl->data_len > *keybufsize) {
917 ZCRYPT_DBF_ERR("%s mismatch reply data len / key buffer len\n",
918 __func__);
919 rc = -ENOSPC;
920 goto out;
921 }
922
923 /* copy key blob */
924 memcpy(keybuf, rep_pl->data, rep_pl->data_len);
925 *keybufsize = rep_pl->data_len;
926
927 out:
928 kfree(req);
929 kfree(rep);
930 kfree(urb);
931 return rc;
932 }
933
934 int ep11_genaeskey(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
935 u8 *keybuf, size_t *keybufsize, u32 keybufver)
936 {
937 struct ep11kblob_header *hdr;
938 size_t hdr_size, pl_size;
939 u8 *pl;
940 int rc;
941
942 switch (keybufver) {
943 case TOKVER_EP11_AES:
944 case TOKVER_EP11_AES_WITH_HEADER:
945 break;
946 default:
947 return -EINVAL;
948 }
949
950 rc = ep11_kb_split(keybuf, *keybufsize, keybufver,
951 &hdr, &hdr_size, &pl, &pl_size);
952 if (rc)
953 return rc;
954
955 rc = _ep11_genaeskey(card, domain, keybitsize, keygenflags,
956 pl, &pl_size);
957 if (rc)
958 return rc;
959
960 *keybufsize = hdr_size + pl_size;
961
962 /* update header information */
963 hdr->type = TOKTYPE_NON_CCA;
964 hdr->len = *keybufsize;
965 hdr->version = keybufver;
966 hdr->bitlen = keybitsize;
967
968 return 0;
969 }
970 EXPORT_SYMBOL(ep11_genaeskey);
971
972 static int ep11_cryptsingle(u16 card, u16 domain,
973 u16 mode, u32 mech, const u8 *iv,
974 const u8 *key, size_t keysize,
975 const u8 *inbuf, size_t inbufsize,
976 u8 *outbuf, size_t *outbufsize)
977 {
978 struct crypt_req_pl {
979 struct pl_head head;
980 u8 var_tag;
981 u8 var_len;
982 u32 var;
983 u8 mech_tag;
984 u8 mech_len;
985 u32 mech;
986 /*
987 * maybe followed by iv data
988 * followed by key tag + key blob
989 * followed by plaintext tag + plaintext
990 */
991 } __packed * req_pl;
992 struct crypt_rep_pl {
993 struct pl_head head;
994 u8 rc_tag;
995 u8 rc_len;
996 u32 rc;
997 u8 data_tag;
998 u8 data_lenfmt;
999 /* data follows */
1000 } __packed * rep_pl;
1001 struct ep11_cprb *req = NULL, *rep = NULL;
1002 struct ep11_target_dev target;
1003 struct ep11_urb *urb = NULL;
1004 size_t req_pl_size, rep_pl_size;
1005 int n, api = EP11_API_V1, rc = -ENOMEM;
1006 u8 *p;
1007
1008 /* the simple asn1 coding used has length limits */
1009 if (keysize > 0xFFFF || inbufsize > 0xFFFF)
1010 return -EINVAL;
1011
1012 /* request cprb and payload */
1013 req_pl_size = sizeof(struct crypt_req_pl) + (iv ? 16 : 0)
1014 + ASN1TAGLEN(keysize) + ASN1TAGLEN(inbufsize);
1015 req = alloc_cprb(req_pl_size);
1016 if (!req)
1017 goto out;
1018 req_pl = (struct crypt_req_pl *)(((u8 *)req) + sizeof(*req));
1019 prep_head(&req_pl->head, req_pl_size, api, (mode ? 20 : 19));
1020 req_pl->var_tag = 0x04;
1021 req_pl->var_len = sizeof(u32);
1022 /* mech is mech + mech params (iv here) */
1023 req_pl->mech_tag = 0x04;
1024 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1025 req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
1026 p = ((u8 *)req_pl) + sizeof(*req_pl);
1027 if (iv) {
1028 memcpy(p, iv, 16);
1029 p += 16;
1030 }
1031 /* key and input data */
1032 p += asn1tag_write(p, 0x04, key, keysize);
1033 p += asn1tag_write(p, 0x04, inbuf, inbufsize);
1034
1035 /* reply cprb and payload, assume out data size <= in data size + 32 */
1036 rep_pl_size = sizeof(struct crypt_rep_pl) + ASN1TAGLEN(inbufsize + 32);
1037 rep = alloc_cprb(rep_pl_size);
1038 if (!rep)
1039 goto out;
1040 rep_pl = (struct crypt_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1041
1042 /* urb and target */
1043 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1044 if (!urb)
1045 goto out;
1046 target.ap_id = card;
1047 target.dom_id = domain;
1048 prep_urb(urb, &target, 1,
1049 req, sizeof(*req) + req_pl_size,
1050 rep, sizeof(*rep) + rep_pl_size);
1051
1052 rc = zcrypt_send_ep11_cprb(urb);
1053 if (rc) {
1054 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1055 __func__, (int)card, (int)domain, rc);
1056 goto out;
1057 }
1058
1059 /* check ep11 reply cprb */
1060 rc = check_reply_cprb(rep, __func__);
1061 if (rc)
1062 goto out;
1063
1064 /* check payload */
1065 rc = check_reply_pl((u8 *)rep_pl, __func__);
1066 if (rc)
1067 goto out;
1068 if (rep_pl->data_tag != 0x04) {
1069 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1070 rc = -EIO;
1071 goto out;
1072 }
1073 p = ((u8 *)rep_pl) + sizeof(*rep_pl);
1074 if (rep_pl->data_lenfmt <= 127) {
1075 n = rep_pl->data_lenfmt;
1076 } else if (rep_pl->data_lenfmt == 0x81) {
1077 n = *p++;
1078 } else if (rep_pl->data_lenfmt == 0x82) {
1079 n = *((u16 *)p);
1080 p += 2;
1081 } else {
1082 ZCRYPT_DBF_ERR("%s unknown reply data length format 0x%02hhx\n",
1083 __func__, rep_pl->data_lenfmt);
1084 rc = -EIO;
1085 goto out;
1086 }
1087 if (n > *outbufsize) {
1088 ZCRYPT_DBF_ERR("%s mismatch reply data len %d / output buffer %zu\n",
1089 __func__, n, *outbufsize);
1090 rc = -ENOSPC;
1091 goto out;
1092 }
1093
1094 memcpy(outbuf, p, n);
1095 *outbufsize = n;
1096
1097 out:
1098 kfree(req);
1099 kfree(rep);
1100 kfree(urb);
1101 return rc;
1102 }
1103
1104 static int _ep11_unwrapkey(u16 card, u16 domain,
1105 const u8 *kek, size_t keksize,
1106 const u8 *enckey, size_t enckeysize,
1107 u32 mech, const u8 *iv,
1108 u32 keybitsize, u32 keygenflags,
1109 u8 *keybuf, size_t *keybufsize)
1110 {
1111 struct uw_req_pl {
1112 struct pl_head head;
1113 u8 attr_tag;
1114 u8 attr_len;
1115 u32 attr_header;
1116 u32 attr_bool_mask;
1117 u32 attr_bool_bits;
1118 u32 attr_key_type;
1119 u32 attr_key_type_value;
1120 u32 attr_val_len;
1121 u32 attr_val_len_value;
1122 u8 mech_tag;
1123 u8 mech_len;
1124 u32 mech;
1125 /*
1126 * maybe followed by iv data
1127 * followed by kek tag + kek blob
1128 * followed by empty mac tag
1129 * followed by empty pin tag or empty pinblob tag
1130 * followed by encryted key tag + bytes
1131 */
1132 } __packed * req_pl;
1133 struct uw_rep_pl {
1134 struct pl_head head;
1135 u8 rc_tag;
1136 u8 rc_len;
1137 u32 rc;
1138 u8 data_tag;
1139 u8 data_lenfmt;
1140 u16 data_len;
1141 u8 data[512];
1142 } __packed * rep_pl;
1143 struct ep11_cprb *req = NULL, *rep = NULL;
1144 size_t req_pl_size, pinblob_size = 0;
1145 struct ep11_target_dev target;
1146 struct ep11_urb *urb = NULL;
1147 int api, rc = -ENOMEM;
1148 u8 *p;
1149
1150 /* request cprb and payload */
1151 api = (!keygenflags || keygenflags & 0x00200000) ?
1152 EP11_API_V4 : EP11_API_V1;
1153 if (ap_is_se_guest()) {
1154 /*
1155 * unwrap within SE environment requires API ordinal 6
1156 * with empty pinblob
1157 */
1158 api = EP11_API_V6;
1159 pinblob_size = EP11_PINBLOB_V1_BYTES;
1160 }
1161 req_pl_size = sizeof(struct uw_req_pl) + (iv ? 16 : 0)
1162 + ASN1TAGLEN(keksize) + ASN1TAGLEN(0)
1163 + ASN1TAGLEN(pinblob_size) + ASN1TAGLEN(enckeysize);
1164 req = alloc_cprb(req_pl_size);
1165 if (!req)
1166 goto out;
1167 req_pl = (struct uw_req_pl *)(((u8 *)req) + sizeof(*req));
1168 prep_head(&req_pl->head, req_pl_size, api, 34); /* UnwrapKey */
1169 req_pl->attr_tag = 0x04;
1170 req_pl->attr_len = 7 * sizeof(u32);
1171 req_pl->attr_header = 0x10020000;
1172 req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
1173 req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
1174 req_pl->attr_key_type = 0x00000100; /* CKA_KEY_TYPE */
1175 req_pl->attr_key_type_value = 0x0000001f; /* CKK_AES */
1176 req_pl->attr_val_len = 0x00000161; /* CKA_VALUE_LEN */
1177 req_pl->attr_val_len_value = keybitsize / 8;
1178 /* mech is mech + mech params (iv here) */
1179 req_pl->mech_tag = 0x04;
1180 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1181 req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
1182 p = ((u8 *)req_pl) + sizeof(*req_pl);
1183 if (iv) {
1184 memcpy(p, iv, 16);
1185 p += 16;
1186 }
1187 /* kek */
1188 p += asn1tag_write(p, 0x04, kek, keksize);
1189 /* empty mac key tag */
1190 *p++ = 0x04;
1191 *p++ = 0;
1192 /* pin tag */
1193 *p++ = 0x04;
1194 *p++ = pinblob_size;
1195 p += pinblob_size;
1196 /* encrypted key value tag and bytes */
1197 p += asn1tag_write(p, 0x04, enckey, enckeysize);
1198
1199 /* reply cprb and payload */
1200 rep = alloc_cprb(sizeof(struct uw_rep_pl));
1201 if (!rep)
1202 goto out;
1203 rep_pl = (struct uw_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1204
1205 /* urb and target */
1206 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1207 if (!urb)
1208 goto out;
1209 target.ap_id = card;
1210 target.dom_id = domain;
1211 prep_urb(urb, &target, 1,
1212 req, sizeof(*req) + req_pl_size,
1213 rep, sizeof(*rep) + sizeof(*rep_pl));
1214
1215 rc = zcrypt_send_ep11_cprb(urb);
1216 if (rc) {
1217 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1218 __func__, (int)card, (int)domain, rc);
1219 goto out;
1220 }
1221
1222 /* check ep11 reply cprb */
1223 rc = check_reply_cprb(rep, __func__);
1224 if (rc)
1225 goto out;
1226
1227 /* check payload */
1228 rc = check_reply_pl((u8 *)rep_pl, __func__);
1229 if (rc)
1230 goto out;
1231 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1232 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1233 rc = -EIO;
1234 goto out;
1235 }
1236 if (rep_pl->data_len > *keybufsize) {
1237 ZCRYPT_DBF_ERR("%s mismatch reply data len / key buffer len\n",
1238 __func__);
1239 rc = -ENOSPC;
1240 goto out;
1241 }
1242
1243 /* copy key blob */
1244 memcpy(keybuf, rep_pl->data, rep_pl->data_len);
1245 *keybufsize = rep_pl->data_len;
1246
1247 out:
1248 kfree(req);
1249 kfree(rep);
1250 kfree(urb);
1251 return rc;
1252 }
1253
1254 static int ep11_unwrapkey(u16 card, u16 domain,
1255 const u8 *kek, size_t keksize,
1256 const u8 *enckey, size_t enckeysize,
1257 u32 mech, const u8 *iv,
1258 u32 keybitsize, u32 keygenflags,
1259 u8 *keybuf, size_t *keybufsize,
1260 u8 keybufver)
1261 {
1262 struct ep11kblob_header *hdr;
1263 size_t hdr_size, pl_size;
1264 u8 *pl;
1265 int rc;
1266
1267 rc = ep11_kb_split(keybuf, *keybufsize, keybufver,
1268 &hdr, &hdr_size, &pl, &pl_size);
1269 if (rc)
1270 return rc;
1271
1272 rc = _ep11_unwrapkey(card, domain, kek, keksize, enckey, enckeysize,
1273 mech, iv, keybitsize, keygenflags,
1274 pl, &pl_size);
1275 if (rc)
1276 return rc;
1277
1278 *keybufsize = hdr_size + pl_size;
1279
1280 /* update header information */
1281 hdr = (struct ep11kblob_header *)keybuf;
1282 hdr->type = TOKTYPE_NON_CCA;
1283 hdr->len = *keybufsize;
1284 hdr->version = keybufver;
1285 hdr->bitlen = keybitsize;
1286
1287 return 0;
1288 }
1289
1290 static int _ep11_wrapkey(u16 card, u16 domain,
1291 const u8 *key, size_t keysize,
1292 u32 mech, const u8 *iv,
1293 u8 *databuf, size_t *datasize)
1294 {
1295 struct wk_req_pl {
1296 struct pl_head head;
1297 u8 var_tag;
1298 u8 var_len;
1299 u32 var;
1300 u8 mech_tag;
1301 u8 mech_len;
1302 u32 mech;
1303 /*
1304 * followed by iv data
1305 * followed by key tag + key blob
1306 * followed by dummy kek param
1307 * followed by dummy mac param
1308 */
1309 } __packed * req_pl;
1310 struct wk_rep_pl {
1311 struct pl_head head;
1312 u8 rc_tag;
1313 u8 rc_len;
1314 u32 rc;
1315 u8 data_tag;
1316 u8 data_lenfmt;
1317 u16 data_len;
1318 u8 data[1024];
1319 } __packed * rep_pl;
1320 struct ep11_cprb *req = NULL, *rep = NULL;
1321 struct ep11_target_dev target;
1322 struct ep11_urb *urb = NULL;
1323 size_t req_pl_size;
1324 int api, rc = -ENOMEM;
1325 u8 *p;
1326
1327 /* request cprb and payload */
1328 req_pl_size = sizeof(struct wk_req_pl) + (iv ? 16 : 0)
1329 + ASN1TAGLEN(keysize) + 4;
1330 req = alloc_cprb(req_pl_size);
1331 if (!req)
1332 goto out;
1333 if (!mech || mech == 0x80060001)
1334 req->flags |= 0x20; /* CPACF_WRAP needs special bit */
1335 req_pl = (struct wk_req_pl *)(((u8 *)req) + sizeof(*req));
1336 api = (!mech || mech == 0x80060001) ? /* CKM_IBM_CPACF_WRAP */
1337 EP11_API_V4 : EP11_API_V1;
1338 prep_head(&req_pl->head, req_pl_size, api, 33); /* WrapKey */
1339 req_pl->var_tag = 0x04;
1340 req_pl->var_len = sizeof(u32);
1341 /* mech is mech + mech params (iv here) */
1342 req_pl->mech_tag = 0x04;
1343 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1344 req_pl->mech = (mech ? mech : 0x80060001); /* CKM_IBM_CPACF_WRAP */
1345 p = ((u8 *)req_pl) + sizeof(*req_pl);
1346 if (iv) {
1347 memcpy(p, iv, 16);
1348 p += 16;
1349 }
1350 /* key blob */
1351 p += asn1tag_write(p, 0x04, key, keysize);
1352 /* empty kek tag */
1353 *p++ = 0x04;
1354 *p++ = 0;
1355 /* empty mac tag */
1356 *p++ = 0x04;
1357 *p++ = 0;
1358
1359 /* reply cprb and payload */
1360 rep = alloc_cprb(sizeof(struct wk_rep_pl));
1361 if (!rep)
1362 goto out;
1363 rep_pl = (struct wk_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1364
1365 /* urb and target */
1366 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1367 if (!urb)
1368 goto out;
1369 target.ap_id = card;
1370 target.dom_id = domain;
1371 prep_urb(urb, &target, 1,
1372 req, sizeof(*req) + req_pl_size,
1373 rep, sizeof(*rep) + sizeof(*rep_pl));
1374
1375 rc = zcrypt_send_ep11_cprb(urb);
1376 if (rc) {
1377 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1378 __func__, (int)card, (int)domain, rc);
1379 goto out;
1380 }
1381
1382 /* check ep11 reply cprb */
1383 rc = check_reply_cprb(rep, __func__);
1384 if (rc)
1385 goto out;
1386
1387 /* check payload */
1388 rc = check_reply_pl((u8 *)rep_pl, __func__);
1389 if (rc)
1390 goto out;
1391 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1392 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1393 rc = -EIO;
1394 goto out;
1395 }
1396 if (rep_pl->data_len > *datasize) {
1397 ZCRYPT_DBF_ERR("%s mismatch reply data len / data buffer len\n",
1398 __func__);
1399 rc = -ENOSPC;
1400 goto out;
1401 }
1402
1403 /* copy the data from the cprb to the data buffer */
1404 memcpy(databuf, rep_pl->data, rep_pl->data_len);
1405 *datasize = rep_pl->data_len;
1406
1407 out:
1408 kfree(req);
1409 kfree(rep);
1410 kfree(urb);
1411 return rc;
1412 }
1413
1414 int ep11_clr2keyblob(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
1415 const u8 *clrkey, u8 *keybuf, size_t *keybufsize,
1416 u32 keytype)
1417 {
1418 int rc;
1419 u8 encbuf[64], *kek = NULL;
1420 size_t clrkeylen, keklen, encbuflen = sizeof(encbuf);
1421
1422 if (keybitsize == 128 || keybitsize == 192 || keybitsize == 256) {
1423 clrkeylen = keybitsize / 8;
1424 } else {
1425 ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
1426 __func__, keybitsize);
1427 return -EINVAL;
1428 }
1429
1430 /* allocate memory for the temp kek */
1431 keklen = MAXEP11AESKEYBLOBSIZE;
1432 kek = kmalloc(keklen, GFP_ATOMIC);
1433 if (!kek) {
1434 rc = -ENOMEM;
1435 goto out;
1436 }
1437
1438 /* Step 1: generate AES 256 bit random kek key */
1439 rc = _ep11_genaeskey(card, domain, 256,
1440 0x00006c00, /* EN/DECRYPT, WRAP/UNWRAP */
1441 kek, &keklen);
1442 if (rc) {
1443 ZCRYPT_DBF_ERR("%s generate kek key failed, rc=%d\n",
1444 __func__, rc);
1445 goto out;
1446 }
1447
1448 /* Step 2: encrypt clear key value with the kek key */
1449 rc = ep11_cryptsingle(card, domain, 0, 0, def_iv, kek, keklen,
1450 clrkey, clrkeylen, encbuf, &encbuflen);
1451 if (rc) {
1452 ZCRYPT_DBF_ERR("%s encrypting key value with kek key failed, rc=%d\n",
1453 __func__, rc);
1454 goto out;
1455 }
1456
1457 /* Step 3: import the encrypted key value as a new key */
1458 rc = ep11_unwrapkey(card, domain, kek, keklen,
1459 encbuf, encbuflen, 0, def_iv,
1460 keybitsize, 0, keybuf, keybufsize, keytype);
1461 if (rc) {
1462 ZCRYPT_DBF_ERR("%s importing key value as new key failed,, rc=%d\n",
1463 __func__, rc);
1464 goto out;
1465 }
1466
1467 out:
1468 kfree(kek);
1469 return rc;
1470 }
1471 EXPORT_SYMBOL(ep11_clr2keyblob);
1472
1473 int ep11_kblob2protkey(u16 card, u16 dom,
1474 const u8 *keyblob, size_t keybloblen,
1475 u8 *protkey, u32 *protkeylen, u32 *protkeytype)
1476 {
1477 struct ep11kblob_header *hdr;
1478 struct ep11keyblob *key;
1479 size_t wkbuflen, keylen;
1480 struct wk_info {
1481 u16 version;
1482 u8 res1[16];
1483 u32 pkeytype;
1484 u32 pkeybitsize;
1485 u64 pkeysize;
1486 u8 res2[8];
1487 u8 pkey[];
1488 } __packed * wki;
1489 u8 *wkbuf = NULL;
1490 int rc = -EIO;
1491
1492 if (ep11_kb_decode((u8 *)keyblob, keybloblen, &hdr, NULL, &key, &keylen))
1493 return -EINVAL;
1494
1495 if (hdr->version == TOKVER_EP11_AES) {
1496 /* wipe overlayed header */
1497 memset(hdr, 0, sizeof(*hdr));
1498 }
1499 /* !!! hdr is no longer a valid header !!! */
1500
1501 /* alloc temp working buffer */
1502 wkbuflen = (keylen + AES_BLOCK_SIZE) & (~(AES_BLOCK_SIZE - 1));
1503 wkbuf = kmalloc(wkbuflen, GFP_ATOMIC);
1504 if (!wkbuf)
1505 return -ENOMEM;
1506
1507 /* ep11 secure key -> protected key + info */
1508 rc = _ep11_wrapkey(card, dom, (u8 *)key, keylen,
1509 0, def_iv, wkbuf, &wkbuflen);
1510 if (rc) {
1511 ZCRYPT_DBF_ERR("%s rewrapping ep11 key to pkey failed, rc=%d\n",
1512 __func__, rc);
1513 goto out;
1514 }
1515 wki = (struct wk_info *)wkbuf;
1516
1517 /* check struct version and pkey type */
1518 if (wki->version != 1 || wki->pkeytype < 1 || wki->pkeytype > 5) {
1519 ZCRYPT_DBF_ERR("%s wk info version %d or pkeytype %d mismatch.\n",
1520 __func__, (int)wki->version, (int)wki->pkeytype);
1521 rc = -EIO;
1522 goto out;
1523 }
1524
1525 /* check protected key type field */
1526 switch (wki->pkeytype) {
1527 case 1: /* AES */
1528 switch (wki->pkeysize) {
1529 case 16 + 32:
1530 /* AES 128 protected key */
1531 if (protkeytype)
1532 *protkeytype = PKEY_KEYTYPE_AES_128;
1533 break;
1534 case 24 + 32:
1535 /* AES 192 protected key */
1536 if (protkeytype)
1537 *protkeytype = PKEY_KEYTYPE_AES_192;
1538 break;
1539 case 32 + 32:
1540 /* AES 256 protected key */
1541 if (protkeytype)
1542 *protkeytype = PKEY_KEYTYPE_AES_256;
1543 break;
1544 default:
1545 ZCRYPT_DBF_ERR("%s unknown/unsupported AES pkeysize %d\n",
1546 __func__, (int)wki->pkeysize);
1547 rc = -EIO;
1548 goto out;
1549 }
1550 break;
1551 case 3: /* EC-P */
1552 case 4: /* EC-ED */
1553 case 5: /* EC-BP */
1554 if (protkeytype)
1555 *protkeytype = PKEY_KEYTYPE_ECC;
1556 break;
1557 case 2: /* TDES */
1558 default:
1559 ZCRYPT_DBF_ERR("%s unknown/unsupported key type %d\n",
1560 __func__, (int)wki->pkeytype);
1561 rc = -EIO;
1562 goto out;
1563 }
1564
1565 /* copy the translated protected key */
1566 if (wki->pkeysize > *protkeylen) {
1567 ZCRYPT_DBF_ERR("%s wk info pkeysize %llu > protkeysize %u\n",
1568 __func__, wki->pkeysize, *protkeylen);
1569 rc = -EINVAL;
1570 goto out;
1571 }
1572 memcpy(protkey, wki->pkey, wki->pkeysize);
1573 *protkeylen = wki->pkeysize;
1574
1575 out:
1576 kfree(wkbuf);
1577 return rc;
1578 }
1579 EXPORT_SYMBOL(ep11_kblob2protkey);
1580
1581 int ep11_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
1582 int minhwtype, int minapi, const u8 *wkvp)
1583 {
1584 struct zcrypt_device_status_ext *device_status;
1585 u32 *_apqns = NULL, _nr_apqns = 0;
1586 int i, card, dom, rc = -ENOMEM;
1587 struct ep11_domain_info edi;
1588 struct ep11_card_info eci;
1589
1590 /* fetch status of all crypto cards */
1591 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1592 sizeof(struct zcrypt_device_status_ext),
1593 GFP_KERNEL);
1594 if (!device_status)
1595 return -ENOMEM;
1596 zcrypt_device_status_mask_ext(device_status);
1597
1598 /* allocate 1k space for up to 256 apqns */
1599 _apqns = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
1600 if (!_apqns) {
1601 kvfree(device_status);
1602 return -ENOMEM;
1603 }
1604
1605 /* walk through all the crypto apqnss */
1606 for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) {
1607 card = AP_QID_CARD(device_status[i].qid);
1608 dom = AP_QID_QUEUE(device_status[i].qid);
1609 /* check online state */
1610 if (!device_status[i].online)
1611 continue;
1612 /* check for ep11 functions */
1613 if (!(device_status[i].functions & 0x01))
1614 continue;
1615 /* check cardnr */
1616 if (cardnr != 0xFFFF && card != cardnr)
1617 continue;
1618 /* check domain */
1619 if (domain != 0xFFFF && dom != domain)
1620 continue;
1621 /* check min hardware type */
1622 if (minhwtype && device_status[i].hwtype < minhwtype)
1623 continue;
1624 /* check min api version if given */
1625 if (minapi > 0) {
1626 if (ep11_get_card_info(card, &eci, 0))
1627 continue;
1628 if (minapi > eci.API_ord_nr)
1629 continue;
1630 }
1631 /* check wkvp if given */
1632 if (wkvp) {
1633 if (ep11_get_domain_info(card, dom, &edi))
1634 continue;
1635 if (edi.cur_wk_state != '1')
1636 continue;
1637 if (memcmp(wkvp, edi.cur_wkvp, 16))
1638 continue;
1639 }
1640 /* apqn passed all filtering criterons, add to the array */
1641 if (_nr_apqns < 256)
1642 _apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom);
1643 }
1644
1645 /* nothing found ? */
1646 if (!_nr_apqns) {
1647 kfree(_apqns);
1648 rc = -ENODEV;
1649 } else {
1650 /* no re-allocation, simple return the _apqns array */
1651 *apqns = _apqns;
1652 *nr_apqns = _nr_apqns;
1653 rc = 0;
1654 }
1655
1656 kvfree(device_status);
1657 return rc;
1658 }
1659 EXPORT_SYMBOL(ep11_findcard2);
1660
1661 void __exit zcrypt_ep11misc_exit(void)
1662 {
1663 card_cache_free();
1664 }
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