projects/linux·blob master · refs

1642 lines · 41.3 KiB

1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright IBM Corp. 2019
4 * Author(s): Harald Freudenberger <[email protected]>
5 *
6 * Collection of EP11 misc functions used by zcrypt and pkey
7 */
8
9#define pr_fmt(fmt) "zcrypt: " fmt
10
11#include <linux/export.h>
12#include <linux/init.h>
13#include <linux/mempool.h>
14#include <linux/module.h>
15#include <linux/random.h>
16#include <linux/slab.h>
17#include <linux/align.h>
18#include <asm/zcrypt.h>
19#include <asm/pkey.h>
20#include <crypto/aes.h>
21
22#include "ap_bus.h"
23#include "zcrypt_api.h"
24#include "zcrypt_debug.h"
25#include "zcrypt_msgtype6.h"
26#include "zcrypt_ep11misc.h"
27#include "zcrypt_ccamisc.h"
28
29#define EP11_PINBLOB_V1_BYTES 56
30
31/* default iv used here */
32static const u8 def_iv[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
33 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };
34
35/*
36 * Cprb memory pool held for urgent cases where no memory
37 * can be allocated via kmalloc. This pool is only used when
38 * alloc_cprbmem() is called with the xflag ZCRYPT_XFLAG_NOMEMALLOC.
39 */
40#define CPRB_MEMPOOL_ITEM_SIZE (8 * 1024)
41static mempool_t *cprb_mempool;
42
43/*
44 * This is a pre-allocated memory for the device status array
45 * used within the ep11_findcard2() function. It is currently
46 * 128 * 128 * 4 bytes = 64 KB big. Usage of this memory is
47 * controlled via dev_status_mem_mutex. Needs adaption if more
48 * than 128 cards or domains to be are supported.
49 */
50#define ZCRYPT_DEV_STATUS_CARD_MAX 128
51#define ZCRYPT_DEV_STATUS_QUEUE_MAX 128
52#define ZCRYPT_DEV_STATUS_ENTRIES (ZCRYPT_DEV_STATUS_CARD_MAX * \
53 ZCRYPT_DEV_STATUS_QUEUE_MAX)
54#define ZCRYPT_DEV_STATUS_EXT_SIZE (ZCRYPT_DEV_STATUS_ENTRIES * \
55 sizeof(struct zcrypt_device_status_ext))
56static void *dev_status_mem;
57static DEFINE_MUTEX(dev_status_mem_mutex);
58
59static int ep11_kb_split(const u8 *kb, size_t kblen, u32 kbver,
60 struct ep11kblob_header **kbhdr, size_t *kbhdrsize,
61 u8 **kbpl, size_t *kbplsize)
62{
63 struct ep11kblob_header *hdr = NULL;
64 size_t hdrsize, plsize = 0;
65 int rc = -EINVAL;
66 u8 *pl = NULL;
67
68 if (kblen < sizeof(struct ep11kblob_header))
69 goto out;
70 hdr = (struct ep11kblob_header *)kb;
71
72 switch (kbver) {
73 case TOKVER_EP11_AES:
74 /* header overlays the payload */
75 hdrsize = 0;
76 break;
77 case TOKVER_EP11_ECC_WITH_HEADER:
78 case TOKVER_EP11_AES_WITH_HEADER:
79 /* payload starts after the header */
80 hdrsize = sizeof(struct ep11kblob_header);
81 break;
82 default:
83 goto out;
84 }
85
86 plsize = kblen - hdrsize;
87 pl = (u8 *)kb + hdrsize;
88
89 if (kbhdr)
90 *kbhdr = hdr;
91 if (kbhdrsize)
92 *kbhdrsize = hdrsize;
93 if (kbpl)
94 *kbpl = pl;
95 if (kbplsize)
96 *kbplsize = plsize;
97
98 rc = 0;
99out:
100 return rc;
101}
102
103static int ep11_kb_decode(const u8 *kb, size_t kblen,
104 struct ep11kblob_header **kbhdr, size_t *kbhdrsize,
105 struct ep11keyblob **kbpl, size_t *kbplsize)
106{
107 struct ep11kblob_header *tmph, *hdr = NULL;
108 size_t hdrsize = 0, plsize = 0;
109 struct ep11keyblob *pl = NULL;
110 int rc = -EINVAL;
111 u8 *tmpp;
112
113 if (kblen < sizeof(struct ep11kblob_header))
114 goto out;
115 tmph = (struct ep11kblob_header *)kb;
116
117 if (tmph->type != TOKTYPE_NON_CCA &&
118 tmph->len > kblen)
119 goto out;
120
121 if (ep11_kb_split(kb, kblen, tmph->version,
122 &hdr, &hdrsize, &tmpp, &plsize))
123 goto out;
124
125 if (plsize < sizeof(struct ep11keyblob))
126 goto out;
127
128 if (!is_ep11_keyblob(tmpp))
129 goto out;
130
131 pl = (struct ep11keyblob *)tmpp;
132 plsize = hdr->len - hdrsize;
133
134 if (kbhdr)
135 *kbhdr = hdr;
136 if (kbhdrsize)
137 *kbhdrsize = hdrsize;
138 if (kbpl)
139 *kbpl = pl;
140 if (kbplsize)
141 *kbplsize = plsize;
142
143 rc = 0;
144out:
145 return rc;
146}
147
148/*
149 * For valid ep11 keyblobs, returns a reference to the wrappingkey verification
150 * pattern. Otherwise NULL.
151 */
152const u8 *ep11_kb_wkvp(const u8 *keyblob, u32 keybloblen)
153{
154 struct ep11keyblob *kb;
155
156 if (ep11_kb_decode(keyblob, keybloblen, NULL, NULL, &kb, NULL))
157 return NULL;
158 return kb->wkvp;
159}
160EXPORT_SYMBOL(ep11_kb_wkvp);
161
162/*
163 * Simple check if the key blob is a valid EP11 AES key blob with header.
164 */
165int ep11_check_aes_key_with_hdr(debug_info_t *dbg, int dbflvl,
166 const u8 *key, u32 keylen, int checkcpacfexp)
167{
168 struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
169 struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
170
171#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
172
173 if (keylen < sizeof(*hdr) + sizeof(*kb)) {
174 DBF("%s key check failed, keylen %u < %zu\n",
175 __func__, keylen, sizeof(*hdr) + sizeof(*kb));
176 return -EINVAL;
177 }
178
179 if (hdr->type != TOKTYPE_NON_CCA) {
180 if (dbg)
181 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
182 __func__, (int)hdr->type, TOKTYPE_NON_CCA);
183 return -EINVAL;
184 }
185 if (hdr->hver != 0x00) {
186 if (dbg)
187 DBF("%s key check failed, header version 0x%02x != 0x00\n",
188 __func__, (int)hdr->hver);
189 return -EINVAL;
190 }
191 if (hdr->version != TOKVER_EP11_AES_WITH_HEADER) {
192 if (dbg)
193 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
194 __func__, (int)hdr->version, TOKVER_EP11_AES_WITH_HEADER);
195 return -EINVAL;
196 }
197 if (hdr->len > keylen) {
198 if (dbg)
199 DBF("%s key check failed, header len %d keylen %u mismatch\n",
200 __func__, (int)hdr->len, keylen);
201 return -EINVAL;
202 }
203 if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
204 if (dbg)
205 DBF("%s key check failed, header len %d < %zu\n",
206 __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
207 return -EINVAL;
208 }
209
210 if (kb->version != EP11_STRUCT_MAGIC) {
211 if (dbg)
212 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
213 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
214 return -EINVAL;
215 }
216 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
217 if (dbg)
218 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
219 __func__);
220 return -EINVAL;
221 }
222
223#undef DBF
224
225 return 0;
226}
227EXPORT_SYMBOL(ep11_check_aes_key_with_hdr);
228
229/*
230 * Simple check if the key blob is a valid EP11 ECC key blob with header.
231 */
232int ep11_check_ecc_key_with_hdr(debug_info_t *dbg, int dbflvl,
233 const u8 *key, u32 keylen, int checkcpacfexp)
234{
235 struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
236 struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
237
238#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
239
240 if (keylen < sizeof(*hdr) + sizeof(*kb)) {
241 DBF("%s key check failed, keylen %u < %zu\n",
242 __func__, keylen, sizeof(*hdr) + sizeof(*kb));
243 return -EINVAL;
244 }
245
246 if (hdr->type != TOKTYPE_NON_CCA) {
247 if (dbg)
248 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
249 __func__, (int)hdr->type, TOKTYPE_NON_CCA);
250 return -EINVAL;
251 }
252 if (hdr->hver != 0x00) {
253 if (dbg)
254 DBF("%s key check failed, header version 0x%02x != 0x00\n",
255 __func__, (int)hdr->hver);
256 return -EINVAL;
257 }
258 if (hdr->version != TOKVER_EP11_ECC_WITH_HEADER) {
259 if (dbg)
260 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
261 __func__, (int)hdr->version, TOKVER_EP11_ECC_WITH_HEADER);
262 return -EINVAL;
263 }
264 if (hdr->len > keylen) {
265 if (dbg)
266 DBF("%s key check failed, header len %d keylen %u mismatch\n",
267 __func__, (int)hdr->len, keylen);
268 return -EINVAL;
269 }
270 if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
271 if (dbg)
272 DBF("%s key check failed, header len %d < %zu\n",
273 __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
274 return -EINVAL;
275 }
276
277 if (kb->version != EP11_STRUCT_MAGIC) {
278 if (dbg)
279 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
280 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
281 return -EINVAL;
282 }
283 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
284 if (dbg)
285 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
286 __func__);
287 return -EINVAL;
288 }
289
290#undef DBF
291
292 return 0;
293}
294EXPORT_SYMBOL(ep11_check_ecc_key_with_hdr);
295
296/*
297 * Simple check if the key blob is a valid EP11 AES key blob with
298 * the header in the session field (old style EP11 AES key).
299 */
300int ep11_check_aes_key(debug_info_t *dbg, int dbflvl,
301 const u8 *key, u32 keylen, int checkcpacfexp)
302{
303 struct ep11keyblob *kb = (struct ep11keyblob *)key;
304
305#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
306
307 if (keylen < sizeof(*kb)) {
308 DBF("%s key check failed, keylen %u < %zu\n",
309 __func__, keylen, sizeof(*kb));
310 return -EINVAL;
311 }
312
313 if (kb->head.type != TOKTYPE_NON_CCA) {
314 if (dbg)
315 DBF("%s key check failed, type 0x%02x != 0x%02x\n",
316 __func__, (int)kb->head.type, TOKTYPE_NON_CCA);
317 return -EINVAL;
318 }
319 if (kb->head.version != TOKVER_EP11_AES) {
320 if (dbg)
321 DBF("%s key check failed, version 0x%02x != 0x%02x\n",
322 __func__, (int)kb->head.version, TOKVER_EP11_AES);
323 return -EINVAL;
324 }
325 if (kb->head.len > keylen) {
326 if (dbg)
327 DBF("%s key check failed, header len %d keylen %u mismatch\n",
328 __func__, (int)kb->head.len, keylen);
329 return -EINVAL;
330 }
331 if (kb->head.len < sizeof(*kb)) {
332 if (dbg)
333 DBF("%s key check failed, header len %d < %zu\n",
334 __func__, (int)kb->head.len, sizeof(*kb));
335 return -EINVAL;
336 }
337
338 if (kb->version != EP11_STRUCT_MAGIC) {
339 if (dbg)
340 DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
341 __func__, (int)kb->version, EP11_STRUCT_MAGIC);
342 return -EINVAL;
343 }
344 if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
345 if (dbg)
346 DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
347 __func__);
348 return -EINVAL;
349 }
350
351#undef DBF
352
353 return 0;
354}
355EXPORT_SYMBOL(ep11_check_aes_key);
356
357/*
358 * Allocate and prepare ep11 cprb plus additional payload.
359 * It is guaranteed that the memory is aligned to a 4 byte boundary.
360 * Furthermore the memory allocation is rounded up to the next
361 * multiple of 4 bytes (with taking the payload_len into account).
362 */
363static void *alloc_cprbmem(size_t payload_len, u32 xflags)
364{
365 size_t memlen = ALIGN(sizeof(struct ep11_cprb) + payload_len, 4);
366 struct ep11_cprb *cprb = NULL;
367
368 if (xflags & ZCRYPT_XFLAG_NOMEMALLOC) {
369 if (memlen <= CPRB_MEMPOOL_ITEM_SIZE)
370 cprb = mempool_alloc_preallocated(cprb_mempool);
371 } else {
372 cprb = kmalloc(memlen, GFP_KERNEL);
373 }
374 if (!cprb)
375 return NULL;
376 memset(cprb, 0, memlen);
377
378 cprb->cprb_len = sizeof(struct ep11_cprb);
379 cprb->cprb_ver_id = 0x04;
380 memcpy(cprb->func_id, "T4", 2);
381 cprb->ret_code = 0xFFFFFFFF;
382 cprb->payload_len = payload_len;
383
384 return cprb;
385}
386
387/*
388 * Free ep11 cprb buffer space.
389 */
390static void free_cprbmem(void *mem, size_t payload_len, bool scrub, u32 xflags)
391{
392 size_t memlen = ALIGN(sizeof(struct ep11_cprb) + payload_len, 4);
393
394 if (mem && scrub)
395 memzero_explicit(mem, memlen);
396
397 if (xflags & ZCRYPT_XFLAG_NOMEMALLOC)
398 mempool_free(mem, cprb_mempool);
399 else
400 kfree(mem);
401}
402
403/*
404 * Some helper functions related to ASN1 encoding.
405 * Limited to length info <= 2 byte.
406 */
407
408#define ASN1TAGLEN(x) (2 + (x) + ((x) > 127 ? 1 : 0) + ((x) > 255 ? 1 : 0))
409
410static int asn1tag_write(u8 *ptr, u8 tag, const u8 *pvalue, u16 valuelen)
411{
412 ptr[0] = tag;
413 if (valuelen > 255) {
414 ptr[1] = 0x82;
415 *((u16 *)(ptr + 2)) = valuelen;
416 memcpy(ptr + 4, pvalue, valuelen);
417 return 4 + valuelen;
418 }
419 if (valuelen > 127) {
420 ptr[1] = 0x81;
421 ptr[2] = (u8)valuelen;
422 memcpy(ptr + 3, pvalue, valuelen);
423 return 3 + valuelen;
424 }
425 ptr[1] = (u8)valuelen;
426 memcpy(ptr + 2, pvalue, valuelen);
427 return 2 + valuelen;
428}
429
430/* EP11 payload > 127 bytes starts with this struct */
431struct pl_head {
432 u8 tag;
433 u8 lenfmt;
434 u16 len;
435 u8 func_tag;
436 u8 func_len;
437 u32 func;
438 u8 dom_tag;
439 u8 dom_len;
440 u32 dom;
441} __packed;
442
443/* prep ep11 payload head helper function */
444static inline void prep_head(struct pl_head *h,
445 size_t pl_size, int api, int func)
446{
447 h->tag = 0x30;
448 h->lenfmt = 0x82;
449 h->len = pl_size - 4;
450 h->func_tag = 0x04;
451 h->func_len = sizeof(u32);
452 h->func = (api << 16) + func;
453 h->dom_tag = 0x04;
454 h->dom_len = sizeof(u32);
455}
456
457/* prep urb helper function */
458static inline void prep_urb(struct ep11_urb *u,
459 struct ep11_target_dev *t, int nt,
460 struct ep11_cprb *req, size_t req_len,
461 struct ep11_cprb *rep, size_t rep_len)
462{
463 memset(u, 0, sizeof(*u));
464 u->targets = (u8 __user *)t;
465 u->targets_num = nt;
466 u->req = (u8 __user *)req;
467 u->req_len = req_len;
468 u->resp = (u8 __user *)rep;
469 u->resp_len = rep_len;
470}
471
472/* Check ep11 reply payload, return 0 or suggested errno value. */
473static int check_reply_pl(const u8 *pl, const char *func)
474{
475 int len;
476 u32 ret;
477
478 /* start tag */
479 if (*pl++ != 0x30) {
480 ZCRYPT_DBF_ERR("%s reply start tag mismatch\n", func);
481 return -EIO;
482 }
483
484 /* payload length format */
485 if (*pl < 127) {
486 len = *pl;
487 pl++;
488 } else if (*pl == 0x81) {
489 pl++;
490 len = *pl;
491 pl++;
492 } else if (*pl == 0x82) {
493 pl++;
494 len = *((u16 *)pl);
495 pl += 2;
496 } else {
497 ZCRYPT_DBF_ERR("%s reply start tag lenfmt mismatch 0x%02hhx\n",
498 func, *pl);
499 return -EIO;
500 }
501
502 /* len should cover at least 3 fields with 32 bit value each */
503 if (len < 3 * 6) {
504 ZCRYPT_DBF_ERR("%s reply length %d too small\n", func, len);
505 return -EIO;
506 }
507
508 /* function tag, length and value */
509 if (pl[0] != 0x04 || pl[1] != 0x04) {
510 ZCRYPT_DBF_ERR("%s function tag or length mismatch\n", func);
511 return -EIO;
512 }
513 pl += 6;
514
515 /* dom tag, length and value */
516 if (pl[0] != 0x04 || pl[1] != 0x04) {
517 ZCRYPT_DBF_ERR("%s dom tag or length mismatch\n", func);
518 return -EIO;
519 }
520 pl += 6;
521
522 /* return value tag, length and value */
523 if (pl[0] != 0x04 || pl[1] != 0x04) {
524 ZCRYPT_DBF_ERR("%s return value tag or length mismatch\n",
525 func);
526 return -EIO;
527 }
528 pl += 2;
529 ret = *((u32 *)pl);
530 if (ret != 0) {
531 ZCRYPT_DBF_ERR("%s return value 0x%08x != 0\n", func, ret);
532 return -EIO;
533 }
534
535 return 0;
536}
537
538/* Check ep11 reply cprb, return 0 or suggested errno value. */
539static int check_reply_cprb(const struct ep11_cprb *rep, const char *func)
540{
541 /* check ep11 reply return code field */
542 if (rep->ret_code) {
543 ZCRYPT_DBF_ERR("%s ep11 reply ret_code=0x%08x\n", __func__,
544 rep->ret_code);
545 if (rep->ret_code == 0x000c0003)
546 return -EBUSY;
547 else
548 return -EIO;
549 }
550
551 return 0;
552}
553
554/*
555 * Helper function which does an ep11 query with given query type.
556 */
557static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type,
558 size_t buflen, u8 *buf, u32 xflags)
559{
560 struct ep11_info_req_pl {
561 struct pl_head head;
562 u8 query_type_tag;
563 u8 query_type_len;
564 u32 query_type;
565 u8 query_subtype_tag;
566 u8 query_subtype_len;
567 u32 query_subtype;
568 } __packed * req_pl;
569 struct ep11_info_rep_pl {
570 struct pl_head head;
571 u8 rc_tag;
572 u8 rc_len;
573 u32 rc;
574 u8 data_tag;
575 u8 data_lenfmt;
576 u16 data_len;
577 } __packed * rep_pl;
578 struct ep11_cprb *req = NULL, *rep = NULL;
579 struct ep11_target_dev target;
580 struct ep11_urb urb;
581 int api = EP11_API_V1, rc = -ENOMEM;
582
583 /* request cprb and payload */
584 req = alloc_cprbmem(sizeof(struct ep11_info_req_pl), xflags);
585 if (!req)
586 goto out;
587 req_pl = (struct ep11_info_req_pl *)(((u8 *)req) + sizeof(*req));
588 prep_head(&req_pl->head, sizeof(*req_pl), api, 38); /* get xcp info */
589 req_pl->query_type_tag = 0x04;
590 req_pl->query_type_len = sizeof(u32);
591 req_pl->query_type = query_type;
592 req_pl->query_subtype_tag = 0x04;
593 req_pl->query_subtype_len = sizeof(u32);
594
595 /* reply cprb and payload */
596 rep = alloc_cprbmem(sizeof(struct ep11_info_rep_pl) + buflen, xflags);
597 if (!rep)
598 goto out;
599 rep_pl = (struct ep11_info_rep_pl *)(((u8 *)rep) + sizeof(*rep));
600
601 /* urb and target */
602 target.ap_id = cardnr;
603 target.dom_id = domain;
604 prep_urb(&urb, &target, 1,
605 req, sizeof(*req) + sizeof(*req_pl),
606 rep, sizeof(*rep) + sizeof(*rep_pl) + buflen);
607
608 rc = zcrypt_send_ep11_cprb(&urb, xflags);
609 if (rc) {
610 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
611 __func__, (int)cardnr, (int)domain, rc);
612 goto out;
613 }
614
615 /* check ep11 reply cprb */
616 rc = check_reply_cprb(rep, __func__);
617 if (rc)
618 goto out;
619
620 /* check payload */
621 rc = check_reply_pl((u8 *)rep_pl, __func__);
622 if (rc)
623 goto out;
624 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
625 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
626 rc = -EIO;
627 goto out;
628 }
629 if (rep_pl->data_len > buflen) {
630 ZCRYPT_DBF_ERR("%s mismatch between reply data len and buffer len\n",
631 __func__);
632 rc = -ENOSPC;
633 goto out;
634 }
635
636 memcpy(buf, ((u8 *)rep_pl) + sizeof(*rep_pl), rep_pl->data_len);
637
638out:
639 free_cprbmem(req, 0, false, xflags);
640 free_cprbmem(rep, 0, false, xflags);
641 return rc;
642}
643
644/*
645 * Provide information about an EP11 card.
646 */
647int ep11_get_card_info(u16 card, struct ep11_card_info *info, u32 xflags)
648{
649 int rc;
650 struct ep11_module_query_info {
651 u32 API_ord_nr;
652 u32 firmware_id;
653 u8 FW_major_vers;
654 u8 FW_minor_vers;
655 u8 CSP_major_vers;
656 u8 CSP_minor_vers;
657 u8 fwid[32];
658 u8 xcp_config_hash[32];
659 u8 CSP_config_hash[32];
660 u8 serial[16];
661 u8 module_date_time[16];
662 u64 op_mode;
663 u32 PKCS11_flags;
664 u32 ext_flags;
665 u32 domains;
666 u32 sym_state_bytes;
667 u32 digest_state_bytes;
668 u32 pin_blob_bytes;
669 u32 SPKI_bytes;
670 u32 priv_key_blob_bytes;
671 u32 sym_blob_bytes;
672 u32 max_payload_bytes;
673 u32 CP_profile_bytes;
674 u32 max_CP_index;
675 } __packed * pmqi = NULL;
676
677 /* use the cprb mempool to satisfy this short term mem alloc */
678 pmqi = (xflags & ZCRYPT_XFLAG_NOMEMALLOC) ?
679 mempool_alloc_preallocated(cprb_mempool) :
680 mempool_alloc(cprb_mempool, GFP_KERNEL);
681 if (!pmqi)
682 return -ENOMEM;
683 rc = ep11_query_info(card, AUTOSEL_DOM,
684 0x01 /* module info query */,
685 sizeof(*pmqi), (u8 *)pmqi, xflags);
686 if (rc)
687 goto out;
688
689 memset(info, 0, sizeof(*info));
690 info->API_ord_nr = pmqi->API_ord_nr;
691 info->FW_version = (pmqi->FW_major_vers << 8) + pmqi->FW_minor_vers;
692 memcpy(info->serial, pmqi->serial, sizeof(info->serial));
693 info->op_mode = pmqi->op_mode;
694
695out:
696 mempool_free(pmqi, cprb_mempool);
697 return rc;
698}
699EXPORT_SYMBOL(ep11_get_card_info);
700
701/*
702 * Provide information about a domain within an EP11 card.
703 */
704int ep11_get_domain_info(u16 card, u16 domain,
705 struct ep11_domain_info *info, u32 xflags)
706{
707 int rc;
708 struct ep11_domain_query_info {
709 u32 dom_index;
710 u8 cur_WK_VP[32];
711 u8 new_WK_VP[32];
712 u32 dom_flags;
713 u64 op_mode;
714 } __packed dom_query_info;
715
716 rc = ep11_query_info(card, domain, 0x03 /* domain info query */,
717 sizeof(dom_query_info), (u8 *)&dom_query_info,
718 xflags);
719 if (rc)
720 goto out;
721
722 memset(info, 0, sizeof(*info));
723 info->cur_wk_state = '0';
724 info->new_wk_state = '0';
725 if (dom_query_info.dom_flags & 0x10 /* left imprint mode */) {
726 if (dom_query_info.dom_flags & 0x02 /* cur wk valid */) {
727 info->cur_wk_state = '1';
728 memcpy(info->cur_wkvp, dom_query_info.cur_WK_VP, 32);
729 }
730 if (dom_query_info.dom_flags & 0x04 || /* new wk present */
731 dom_query_info.dom_flags & 0x08 /* new wk committed */) {
732 info->new_wk_state =
733 dom_query_info.dom_flags & 0x08 ? '2' : '1';
734 memcpy(info->new_wkvp, dom_query_info.new_WK_VP, 32);
735 }
736 }
737 info->op_mode = dom_query_info.op_mode;
738
739out:
740 return rc;
741}
742EXPORT_SYMBOL(ep11_get_domain_info);
743
744/*
745 * Default EP11 AES key generate attributes, used when no keygenflags given:
746 * XCP_BLOB_ENCRYPT | XCP_BLOB_DECRYPT | XCP_BLOB_PROTKEY_EXTRACTABLE
747 */
748#define KEY_ATTR_DEFAULTS 0x00200c00
749
750static int _ep11_genaeskey(u16 card, u16 domain,
751 u32 keybitsize, u32 keygenflags,
752 u8 *keybuf, size_t *keybufsize, u32 xflags)
753{
754 struct keygen_req_pl {
755 struct pl_head head;
756 u8 var_tag;
757 u8 var_len;
758 u32 var;
759 u8 keybytes_tag;
760 u8 keybytes_len;
761 u32 keybytes;
762 u8 mech_tag;
763 u8 mech_len;
764 u32 mech;
765 u8 attr_tag;
766 u8 attr_len;
767 u32 attr_header;
768 u32 attr_bool_mask;
769 u32 attr_bool_bits;
770 u32 attr_val_len_type;
771 u32 attr_val_len_value;
772 /* followed by empty pin tag or empty pinblob tag */
773 } __packed * req_pl;
774 struct keygen_rep_pl {
775 struct pl_head head;
776 u8 rc_tag;
777 u8 rc_len;
778 u32 rc;
779 u8 data_tag;
780 u8 data_lenfmt;
781 u16 data_len;
782 u8 data[512];
783 } __packed * rep_pl;
784 struct ep11_cprb *req = NULL, *rep = NULL;
785 size_t req_pl_size, pinblob_size = 0;
786 struct ep11_target_dev target;
787 struct ep11_urb urb;
788 int api, rc = -ENOMEM;
789 u8 *p;
790
791 switch (keybitsize) {
792 case 128:
793 case 192:
794 case 256:
795 break;
796 default:
797 ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
798 __func__, keybitsize);
799 rc = -EINVAL;
800 goto out;
801 }
802
803 /* request cprb and payload */
804 api = (!keygenflags || keygenflags & 0x00200000) ?
805 EP11_API_V4 : EP11_API_V1;
806 if (ap_is_se_guest()) {
807 /*
808 * genkey within SE environment requires API ordinal 6
809 * with empty pinblob
810 */
811 api = EP11_API_V6;
812 pinblob_size = EP11_PINBLOB_V1_BYTES;
813 }
814 req_pl_size = sizeof(struct keygen_req_pl) + ASN1TAGLEN(pinblob_size);
815 req = alloc_cprbmem(req_pl_size, xflags);
816 if (!req)
817 goto out;
818 req_pl = (struct keygen_req_pl *)(((u8 *)req) + sizeof(*req));
819 prep_head(&req_pl->head, req_pl_size, api, 21); /* GenerateKey */
820 req_pl->var_tag = 0x04;
821 req_pl->var_len = sizeof(u32);
822 req_pl->keybytes_tag = 0x04;
823 req_pl->keybytes_len = sizeof(u32);
824 req_pl->keybytes = keybitsize / 8;
825 req_pl->mech_tag = 0x04;
826 req_pl->mech_len = sizeof(u32);
827 req_pl->mech = 0x00001080; /* CKM_AES_KEY_GEN */
828 req_pl->attr_tag = 0x04;
829 req_pl->attr_len = 5 * sizeof(u32);
830 req_pl->attr_header = 0x10010000;
831 req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
832 req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
833 req_pl->attr_val_len_type = 0x00000161; /* CKA_VALUE_LEN */
834 req_pl->attr_val_len_value = keybitsize / 8;
835 p = ((u8 *)req_pl) + sizeof(*req_pl);
836 /* pin tag */
837 *p++ = 0x04;
838 *p++ = pinblob_size;
839
840 /* reply cprb and payload */
841 rep = alloc_cprbmem(sizeof(struct keygen_rep_pl), xflags);
842 if (!rep)
843 goto out;
844 rep_pl = (struct keygen_rep_pl *)(((u8 *)rep) + sizeof(*rep));
845
846 /* urb and target */
847 target.ap_id = card;
848 target.dom_id = domain;
849 prep_urb(&urb, &target, 1,
850 req, sizeof(*req) + req_pl_size,
851 rep, sizeof(*rep) + sizeof(*rep_pl));
852
853 rc = zcrypt_send_ep11_cprb(&urb, xflags);
854 if (rc) {
855 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
856 __func__, (int)card, (int)domain, rc);
857 goto out;
858 }
859
860 /* check ep11 reply cprb */
861 rc = check_reply_cprb(rep, __func__);
862 if (rc)
863 goto out;
864
865 /* check payload */
866 rc = check_reply_pl((u8 *)rep_pl, __func__);
867 if (rc)
868 goto out;
869 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
870 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
871 rc = -EIO;
872 goto out;
873 }
874 if (rep_pl->data_len > *keybufsize) {
875 ZCRYPT_DBF_ERR("%s mismatch reply data len / key buffer len\n",
876 __func__);
877 rc = -ENOSPC;
878 goto out;
879 }
880
881 /* copy key blob */
882 memcpy(keybuf, rep_pl->data, rep_pl->data_len);
883 *keybufsize = rep_pl->data_len;
884
885out:
886 free_cprbmem(req, 0, false, xflags);
887 free_cprbmem(rep, sizeof(struct keygen_rep_pl), true, xflags);
888 return rc;
889}
890
891int ep11_genaeskey(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
892 u8 *keybuf, u32 *keybufsize, u32 keybufver, u32 xflags)
893{
894 struct ep11kblob_header *hdr;
895 size_t hdr_size, pl_size;
896 u8 *pl;
897 int rc;
898
899 switch (keybufver) {
900 case TOKVER_EP11_AES:
901 case TOKVER_EP11_AES_WITH_HEADER:
902 break;
903 default:
904 return -EINVAL;
905 }
906
907 rc = ep11_kb_split(keybuf, *keybufsize, keybufver,
908 &hdr, &hdr_size, &pl, &pl_size);
909 if (rc)
910 return rc;
911
912 rc = _ep11_genaeskey(card, domain, keybitsize, keygenflags,
913 pl, &pl_size, xflags);
914 if (rc)
915 return rc;
916
917 *keybufsize = hdr_size + pl_size;
918
919 /* update header information */
920 hdr->type = TOKTYPE_NON_CCA;
921 hdr->len = *keybufsize;
922 hdr->version = keybufver;
923 hdr->bitlen = keybitsize;
924
925 return 0;
926}
927EXPORT_SYMBOL(ep11_genaeskey);
928
929static int ep11_cryptsingle(u16 card, u16 domain,
930 u16 mode, u32 mech, const u8 *iv,
931 const u8 *key, size_t keysize,
932 const u8 *inbuf, size_t inbufsize,
933 u8 *outbuf, size_t *outbufsize,
934 u32 xflags)
935{
936 struct crypt_req_pl {
937 struct pl_head head;
938 u8 var_tag;
939 u8 var_len;
940 u32 var;
941 u8 mech_tag;
942 u8 mech_len;
943 u32 mech;
944 /*
945 * maybe followed by iv data
946 * followed by key tag + key blob
947 * followed by plaintext tag + plaintext
948 */
949 } __packed * req_pl;
950 struct crypt_rep_pl {
951 struct pl_head head;
952 u8 rc_tag;
953 u8 rc_len;
954 u32 rc;
955 u8 data_tag;
956 u8 data_lenfmt;
957 /* data follows */
958 } __packed * rep_pl;
959 struct ep11_cprb *req = NULL, *rep = NULL;
960 struct ep11_target_dev target;
961 struct ep11_urb urb;
962 size_t req_pl_size, rep_pl_size = 0;
963 int n, api = EP11_API_V1, rc = -ENOMEM;
964 u8 *p;
965
966 /* the simple asn1 coding used has length limits */
967 if (keysize > 0xFFFF || inbufsize > 0xFFFF)
968 return -EINVAL;
969
970 /* request cprb and payload */
971 req_pl_size = sizeof(struct crypt_req_pl) + (iv ? 16 : 0)
972 + ASN1TAGLEN(keysize) + ASN1TAGLEN(inbufsize);
973 req = alloc_cprbmem(req_pl_size, xflags);
974 if (!req)
975 goto out;
976 req_pl = (struct crypt_req_pl *)(((u8 *)req) + sizeof(*req));
977 prep_head(&req_pl->head, req_pl_size, api, (mode ? 20 : 19));
978 req_pl->var_tag = 0x04;
979 req_pl->var_len = sizeof(u32);
980 /* mech is mech + mech params (iv here) */
981 req_pl->mech_tag = 0x04;
982 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
983 req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
984 p = ((u8 *)req_pl) + sizeof(*req_pl);
985 if (iv) {
986 memcpy(p, iv, 16);
987 p += 16;
988 }
989 /* key and input data */
990 p += asn1tag_write(p, 0x04, key, keysize);
991 p += asn1tag_write(p, 0x04, inbuf, inbufsize);
992
993 /* reply cprb and payload, assume out data size <= in data size + 32 */
994 rep_pl_size = sizeof(struct crypt_rep_pl) + ASN1TAGLEN(inbufsize + 32);
995 rep = alloc_cprbmem(rep_pl_size, xflags);
996 if (!rep)
997 goto out;
998 rep_pl = (struct crypt_rep_pl *)(((u8 *)rep) + sizeof(*rep));
999
1000 /* urb and target */
1001 target.ap_id = card;
1002 target.dom_id = domain;
1003 prep_urb(&urb, &target, 1,
1004 req, sizeof(*req) + req_pl_size,
1005 rep, sizeof(*rep) + rep_pl_size);
1006
1007 rc = zcrypt_send_ep11_cprb(&urb, xflags);
1008 if (rc) {
1009 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1010 __func__, (int)card, (int)domain, rc);
1011 goto out;
1012 }
1013
1014 /* check ep11 reply cprb */
1015 rc = check_reply_cprb(rep, __func__);
1016 if (rc)
1017 goto out;
1018
1019 /* check payload */
1020 rc = check_reply_pl((u8 *)rep_pl, __func__);
1021 if (rc)
1022 goto out;
1023 if (rep_pl->data_tag != 0x04) {
1024 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1025 rc = -EIO;
1026 goto out;
1027 }
1028 p = ((u8 *)rep_pl) + sizeof(*rep_pl);
1029 if (rep_pl->data_lenfmt <= 127) {
1030 n = rep_pl->data_lenfmt;
1031 } else if (rep_pl->data_lenfmt == 0x81) {
1032 n = *p++;
1033 } else if (rep_pl->data_lenfmt == 0x82) {
1034 n = *((u16 *)p);
1035 p += 2;
1036 } else {
1037 ZCRYPT_DBF_ERR("%s unknown reply data length format 0x%02hhx\n",
1038 __func__, rep_pl->data_lenfmt);
1039 rc = -EIO;
1040 goto out;
1041 }
1042 if (n > *outbufsize) {
1043 ZCRYPT_DBF_ERR("%s mismatch reply data len %d / output buffer %zu\n",
1044 __func__, n, *outbufsize);
1045 rc = -ENOSPC;
1046 goto out;
1047 }
1048
1049 memcpy(outbuf, p, n);
1050 *outbufsize = n;
1051
1052out:
1053 free_cprbmem(req, req_pl_size, true, xflags);
1054 free_cprbmem(rep, rep_pl_size, true, xflags);
1055 return rc;
1056}
1057
1058static int _ep11_unwrapkey(u16 card, u16 domain,
1059 const u8 *kek, size_t keksize,
1060 const u8 *enckey, size_t enckeysize,
1061 u32 mech, const u8 *iv,
1062 u32 keybitsize, u32 keygenflags,
1063 u8 *keybuf, size_t *keybufsize, u32 xflags)
1064{
1065 struct uw_req_pl {
1066 struct pl_head head;
1067 u8 attr_tag;
1068 u8 attr_len;
1069 u32 attr_header;
1070 u32 attr_bool_mask;
1071 u32 attr_bool_bits;
1072 u32 attr_key_type;
1073 u32 attr_key_type_value;
1074 u32 attr_val_len;
1075 u32 attr_val_len_value;
1076 u8 mech_tag;
1077 u8 mech_len;
1078 u32 mech;
1079 /*
1080 * maybe followed by iv data
1081 * followed by kek tag + kek blob
1082 * followed by empty mac tag
1083 * followed by empty pin tag or empty pinblob tag
1084 * followed by encryted key tag + bytes
1085 */
1086 } __packed * req_pl;
1087 struct uw_rep_pl {
1088 struct pl_head head;
1089 u8 rc_tag;
1090 u8 rc_len;
1091 u32 rc;
1092 u8 data_tag;
1093 u8 data_lenfmt;
1094 u16 data_len;
1095 u8 data[512];
1096 } __packed * rep_pl;
1097 struct ep11_cprb *req = NULL, *rep = NULL;
1098 size_t req_pl_size, pinblob_size = 0;
1099 struct ep11_target_dev target;
1100 struct ep11_urb urb;
1101 int api, rc = -ENOMEM;
1102 u8 *p;
1103
1104 /* request cprb and payload */
1105 api = (!keygenflags || keygenflags & 0x00200000) ?
1106 EP11_API_V4 : EP11_API_V1;
1107 if (ap_is_se_guest()) {
1108 /*
1109 * unwrap within SE environment requires API ordinal 6
1110 * with empty pinblob
1111 */
1112 api = EP11_API_V6;
1113 pinblob_size = EP11_PINBLOB_V1_BYTES;
1114 }
1115 req_pl_size = sizeof(struct uw_req_pl) + (iv ? 16 : 0)
1116 + ASN1TAGLEN(keksize) + ASN1TAGLEN(0)
1117 + ASN1TAGLEN(pinblob_size) + ASN1TAGLEN(enckeysize);
1118 req = alloc_cprbmem(req_pl_size, xflags);
1119 if (!req)
1120 goto out;
1121 req_pl = (struct uw_req_pl *)(((u8 *)req) + sizeof(*req));
1122 prep_head(&req_pl->head, req_pl_size, api, 34); /* UnwrapKey */
1123 req_pl->attr_tag = 0x04;
1124 req_pl->attr_len = 7 * sizeof(u32);
1125 req_pl->attr_header = 0x10020000;
1126 req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
1127 req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
1128 req_pl->attr_key_type = 0x00000100; /* CKA_KEY_TYPE */
1129 req_pl->attr_key_type_value = 0x0000001f; /* CKK_AES */
1130 req_pl->attr_val_len = 0x00000161; /* CKA_VALUE_LEN */
1131 req_pl->attr_val_len_value = keybitsize / 8;
1132 /* mech is mech + mech params (iv here) */
1133 req_pl->mech_tag = 0x04;
1134 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1135 req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
1136 p = ((u8 *)req_pl) + sizeof(*req_pl);
1137 if (iv) {
1138 memcpy(p, iv, 16);
1139 p += 16;
1140 }
1141 /* kek */
1142 p += asn1tag_write(p, 0x04, kek, keksize);
1143 /* empty mac key tag */
1144 *p++ = 0x04;
1145 *p++ = 0;
1146 /* pin tag */
1147 *p++ = 0x04;
1148 *p++ = pinblob_size;
1149 p += pinblob_size;
1150 /* encrypted key value tag and bytes */
1151 p += asn1tag_write(p, 0x04, enckey, enckeysize);
1152
1153 /* reply cprb and payload */
1154 rep = alloc_cprbmem(sizeof(struct uw_rep_pl), xflags);
1155 if (!rep)
1156 goto out;
1157 rep_pl = (struct uw_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1158
1159 /* urb and target */
1160 target.ap_id = card;
1161 target.dom_id = domain;
1162 prep_urb(&urb, &target, 1,
1163 req, sizeof(*req) + req_pl_size,
1164 rep, sizeof(*rep) + sizeof(*rep_pl));
1165
1166 rc = zcrypt_send_ep11_cprb(&urb, xflags);
1167 if (rc) {
1168 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1169 __func__, (int)card, (int)domain, rc);
1170 goto out;
1171 }
1172
1173 /* check ep11 reply cprb */
1174 rc = check_reply_cprb(rep, __func__);
1175 if (rc)
1176 goto out;
1177
1178 /* check payload */
1179 rc = check_reply_pl((u8 *)rep_pl, __func__);
1180 if (rc)
1181 goto out;
1182 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1183 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1184 rc = -EIO;
1185 goto out;
1186 }
1187 if (rep_pl->data_len > *keybufsize) {
1188 ZCRYPT_DBF_ERR("%s mismatch reply data len / key buffer len\n",
1189 __func__);
1190 rc = -ENOSPC;
1191 goto out;
1192 }
1193
1194 /* copy key blob */
1195 memcpy(keybuf, rep_pl->data, rep_pl->data_len);
1196 *keybufsize = rep_pl->data_len;
1197
1198out:
1199 free_cprbmem(req, req_pl_size, true, xflags);
1200 free_cprbmem(rep, sizeof(struct uw_rep_pl), true, xflags);
1201 return rc;
1202}
1203
1204static int ep11_unwrapkey(u16 card, u16 domain,
1205 const u8 *kek, size_t keksize,
1206 const u8 *enckey, size_t enckeysize,
1207 u32 mech, const u8 *iv,
1208 u32 keybitsize, u32 keygenflags,
1209 u8 *keybuf, u32 *keybufsize,
1210 u8 keybufver, u32 xflags)
1211{
1212 struct ep11kblob_header *hdr;
1213 size_t hdr_size, pl_size;
1214 u8 *pl;
1215 int rc;
1216
1217 rc = ep11_kb_split(keybuf, *keybufsize, keybufver,
1218 &hdr, &hdr_size, &pl, &pl_size);
1219 if (rc)
1220 return rc;
1221
1222 rc = _ep11_unwrapkey(card, domain, kek, keksize, enckey, enckeysize,
1223 mech, iv, keybitsize, keygenflags,
1224 pl, &pl_size, xflags);
1225 if (rc)
1226 return rc;
1227
1228 *keybufsize = hdr_size + pl_size;
1229
1230 /* update header information */
1231 hdr = (struct ep11kblob_header *)keybuf;
1232 hdr->type = TOKTYPE_NON_CCA;
1233 hdr->len = *keybufsize;
1234 hdr->version = keybufver;
1235 hdr->bitlen = keybitsize;
1236
1237 return 0;
1238}
1239
1240static int _ep11_wrapkey(u16 card, u16 domain,
1241 const u8 *key, size_t keysize,
1242 u32 mech, const u8 *iv,
1243 u8 *databuf, size_t *datasize, u32 xflags)
1244{
1245 struct wk_req_pl {
1246 struct pl_head head;
1247 u8 var_tag;
1248 u8 var_len;
1249 u32 var;
1250 u8 mech_tag;
1251 u8 mech_len;
1252 u32 mech;
1253 /*
1254 * followed by iv data
1255 * followed by key tag + key blob
1256 * followed by dummy kek param
1257 * followed by dummy mac param
1258 */
1259 } __packed * req_pl;
1260 struct wk_rep_pl {
1261 struct pl_head head;
1262 u8 rc_tag;
1263 u8 rc_len;
1264 u32 rc;
1265 u8 data_tag;
1266 u8 data_lenfmt;
1267 u16 data_len;
1268 u8 data[1024];
1269 } __packed * rep_pl;
1270 struct ep11_cprb *req = NULL, *rep = NULL;
1271 struct ep11_target_dev target;
1272 struct ep11_urb urb;
1273 size_t req_pl_size;
1274 int api, rc = -ENOMEM;
1275 u8 *p;
1276
1277 /* request cprb and payload */
1278 req_pl_size = sizeof(struct wk_req_pl) + (iv ? 16 : 0)
1279 + ASN1TAGLEN(keysize) + 4;
1280 req = alloc_cprbmem(req_pl_size, xflags);
1281 if (!req)
1282 goto out;
1283 if (!mech || mech == 0x80060001)
1284 req->flags |= 0x20; /* CPACF_WRAP needs special bit */
1285 req_pl = (struct wk_req_pl *)(((u8 *)req) + sizeof(*req));
1286 api = (!mech || mech == 0x80060001) ? /* CKM_IBM_CPACF_WRAP */
1287 EP11_API_V4 : EP11_API_V1;
1288 prep_head(&req_pl->head, req_pl_size, api, 33); /* WrapKey */
1289 req_pl->var_tag = 0x04;
1290 req_pl->var_len = sizeof(u32);
1291 /* mech is mech + mech params (iv here) */
1292 req_pl->mech_tag = 0x04;
1293 req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1294 req_pl->mech = (mech ? mech : 0x80060001); /* CKM_IBM_CPACF_WRAP */
1295 p = ((u8 *)req_pl) + sizeof(*req_pl);
1296 if (iv) {
1297 memcpy(p, iv, 16);
1298 p += 16;
1299 }
1300 /* key blob */
1301 p += asn1tag_write(p, 0x04, key, keysize);
1302 /* empty kek tag */
1303 *p++ = 0x04;
1304 *p++ = 0;
1305 /* empty mac tag */
1306 *p++ = 0x04;
1307 *p++ = 0;
1308
1309 /* reply cprb and payload */
1310 rep = alloc_cprbmem(sizeof(struct wk_rep_pl), xflags);
1311 if (!rep)
1312 goto out;
1313 rep_pl = (struct wk_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1314
1315 /* urb and target */
1316 target.ap_id = card;
1317 target.dom_id = domain;
1318 prep_urb(&urb, &target, 1,
1319 req, sizeof(*req) + req_pl_size,
1320 rep, sizeof(*rep) + sizeof(*rep_pl));
1321
1322 rc = zcrypt_send_ep11_cprb(&urb, xflags);
1323 if (rc) {
1324 ZCRYPT_DBF_ERR("%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1325 __func__, (int)card, (int)domain, rc);
1326 goto out;
1327 }
1328
1329 /* check ep11 reply cprb */
1330 rc = check_reply_cprb(rep, __func__);
1331 if (rc)
1332 goto out;
1333
1334 /* check payload */
1335 rc = check_reply_pl((u8 *)rep_pl, __func__);
1336 if (rc)
1337 goto out;
1338 if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1339 ZCRYPT_DBF_ERR("%s unknown reply data format\n", __func__);
1340 rc = -EIO;
1341 goto out;
1342 }
1343 if (rep_pl->data_len > *datasize) {
1344 ZCRYPT_DBF_ERR("%s mismatch reply data len / data buffer len\n",
1345 __func__);
1346 rc = -ENOSPC;
1347 goto out;
1348 }
1349
1350 /* copy the data from the cprb to the data buffer */
1351 memcpy(databuf, rep_pl->data, rep_pl->data_len);
1352 *datasize = rep_pl->data_len;
1353
1354out:
1355 free_cprbmem(req, req_pl_size, true, xflags);
1356 free_cprbmem(rep, sizeof(struct wk_rep_pl), true, xflags);
1357 return rc;
1358}
1359
1360int ep11_clr2keyblob(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
1361 const u8 *clrkey, u8 *keybuf, u32 *keybufsize,
1362 u32 keytype, u32 xflags)
1363{
1364 int rc;
1365 void *mem;
1366 u8 encbuf[64], *kek;
1367 size_t clrkeylen, keklen, encbuflen = sizeof(encbuf);
1368
1369 if (keybitsize == 128 || keybitsize == 192 || keybitsize == 256) {
1370 clrkeylen = keybitsize / 8;
1371 } else {
1372 ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
1373 __func__, keybitsize);
1374 return -EINVAL;
1375 }
1376
1377 /*
1378 * Allocate space for the temp kek.
1379 * Also we only need up to MAXEP11AESKEYBLOBSIZE bytes for this
1380 * we use the already existing cprb mempool to solve this
1381 * short term memory requirement.
1382 */
1383 mem = (xflags & ZCRYPT_XFLAG_NOMEMALLOC) ?
1384 mempool_alloc_preallocated(cprb_mempool) :
1385 mempool_alloc(cprb_mempool, GFP_KERNEL);
1386 if (!mem)
1387 return -ENOMEM;
1388 kek = (u8 *)mem;
1389 keklen = MAXEP11AESKEYBLOBSIZE;
1390
1391 /* Step 1: generate AES 256 bit random kek key */
1392 rc = _ep11_genaeskey(card, domain, 256,
1393 0x00006c00, /* EN/DECRYPT, WRAP/UNWRAP */
1394 kek, &keklen, xflags);
1395 if (rc) {
1396 ZCRYPT_DBF_ERR("%s generate kek key failed, rc=%d\n",
1397 __func__, rc);
1398 goto out;
1399 }
1400
1401 /* Step 2: encrypt clear key value with the kek key */
1402 rc = ep11_cryptsingle(card, domain, 0, 0, def_iv, kek, keklen,
1403 clrkey, clrkeylen, encbuf, &encbuflen, xflags);
1404 if (rc) {
1405 ZCRYPT_DBF_ERR("%s encrypting key value with kek key failed, rc=%d\n",
1406 __func__, rc);
1407 goto out;
1408 }
1409
1410 /* Step 3: import the encrypted key value as a new key */
1411 rc = ep11_unwrapkey(card, domain, kek, keklen,
1412 encbuf, encbuflen, 0, def_iv,
1413 keybitsize, keygenflags,
1414 keybuf, keybufsize,
1415 keytype, xflags);
1416 if (rc) {
1417 ZCRYPT_DBF_ERR("%s importing key value as new key failed, rc=%d\n",
1418 __func__, rc);
1419 goto out;
1420 }
1421
1422out:
1423 mempool_free(mem, cprb_mempool);
1424 return rc;
1425}
1426EXPORT_SYMBOL(ep11_clr2keyblob);
1427
1428int ep11_kblob2protkey(u16 card, u16 dom,
1429 const u8 *keyblob, u32 keybloblen,
1430 u8 *protkey, u32 *protkeylen, u32 *protkeytype,
1431 u32 xflags)
1432{
1433 struct ep11kblob_header *hdr;
1434 struct ep11keyblob *key;
1435 size_t wkbuflen, keylen;
1436 struct wk_info {
1437 u16 version;
1438 u8 res1[16];
1439 u32 pkeytype;
1440 u32 pkeybitsize;
1441 u64 pkeysize;
1442 u8 res2[8];
1443 u8 pkey[];
1444 } __packed * wki;
1445 u8 *wkbuf = NULL;
1446 int rc = -EIO;
1447
1448 if (ep11_kb_decode((u8 *)keyblob, keybloblen, &hdr, NULL, &key, &keylen))
1449 return -EINVAL;
1450
1451 if (hdr->version == TOKVER_EP11_AES) {
1452 /* wipe overlayed header */
1453 memset(hdr, 0, sizeof(*hdr));
1454 }
1455 /* !!! hdr is no longer a valid header !!! */
1456
1457 /* need a temp working buffer */
1458 wkbuflen = (keylen + AES_BLOCK_SIZE) & (~(AES_BLOCK_SIZE - 1));
1459 if (wkbuflen > CPRB_MEMPOOL_ITEM_SIZE) {
1460 /* this should never happen */
1461 rc = -ENOMEM;
1462 ZCRYPT_DBF_WARN("%s wkbuflen %d > cprb mempool item size %d, rc=%d\n",
1463 __func__, (int)wkbuflen, CPRB_MEMPOOL_ITEM_SIZE, rc);
1464 return rc;
1465 }
1466 /* use the cprb mempool to satisfy this short term mem allocation */
1467 wkbuf = (xflags & ZCRYPT_XFLAG_NOMEMALLOC) ?
1468 mempool_alloc_preallocated(cprb_mempool) :
1469 mempool_alloc(cprb_mempool, GFP_ATOMIC);
1470 if (!wkbuf) {
1471 rc = -ENOMEM;
1472 ZCRYPT_DBF_WARN("%s allocating tmp buffer via cprb mempool failed, rc=%d\n",
1473 __func__, rc);
1474 return rc;
1475 }
1476
1477 /* ep11 secure key -> protected key + info */
1478 rc = _ep11_wrapkey(card, dom, (u8 *)key, keylen,
1479 0, def_iv, wkbuf, &wkbuflen, xflags);
1480 if (rc) {
1481 ZCRYPT_DBF_ERR("%s rewrapping ep11 key to pkey failed, rc=%d\n",
1482 __func__, rc);
1483 goto out;
1484 }
1485 wki = (struct wk_info *)wkbuf;
1486
1487 /* check struct version and pkey type */
1488 if (wki->version != 1 || wki->pkeytype < 1 || wki->pkeytype > 5) {
1489 ZCRYPT_DBF_ERR("%s wk info version %d or pkeytype %d mismatch.\n",
1490 __func__, (int)wki->version, (int)wki->pkeytype);
1491 rc = -EIO;
1492 goto out;
1493 }
1494
1495 /* check protected key type field */
1496 switch (wki->pkeytype) {
1497 case 1: /* AES */
1498 switch (wki->pkeysize) {
1499 case 16 + 32:
1500 /* AES 128 protected key */
1501 if (protkeytype)
1502 *protkeytype = PKEY_KEYTYPE_AES_128;
1503 break;
1504 case 24 + 32:
1505 /* AES 192 protected key */
1506 if (protkeytype)
1507 *protkeytype = PKEY_KEYTYPE_AES_192;
1508 break;
1509 case 32 + 32:
1510 /* AES 256 protected key */
1511 if (protkeytype)
1512 *protkeytype = PKEY_KEYTYPE_AES_256;
1513 break;
1514 default:
1515 ZCRYPT_DBF_ERR("%s unknown/unsupported AES pkeysize %d\n",
1516 __func__, (int)wki->pkeysize);
1517 rc = -EIO;
1518 goto out;
1519 }
1520 break;
1521 case 3: /* EC-P */
1522 case 4: /* EC-ED */
1523 case 5: /* EC-BP */
1524 if (protkeytype)
1525 *protkeytype = PKEY_KEYTYPE_ECC;
1526 break;
1527 case 2: /* TDES */
1528 default:
1529 ZCRYPT_DBF_ERR("%s unknown/unsupported key type %d\n",
1530 __func__, (int)wki->pkeytype);
1531 rc = -EIO;
1532 goto out;
1533 }
1534
1535 /* copy the translated protected key */
1536 if (wki->pkeysize > *protkeylen) {
1537 ZCRYPT_DBF_ERR("%s wk info pkeysize %llu > protkeysize %u\n",
1538 __func__, wki->pkeysize, *protkeylen);
1539 rc = -EINVAL;
1540 goto out;
1541 }
1542 memcpy(protkey, wki->pkey, wki->pkeysize);
1543 *protkeylen = wki->pkeysize;
1544
1545out:
1546 mempool_free(wkbuf, cprb_mempool);
1547 return rc;
1548}
1549EXPORT_SYMBOL(ep11_kblob2protkey);
1550
1551int ep11_findcard2(u32 *apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
1552 int minhwtype, int minapi, const u8 *wkvp, u32 xflags)
1553{
1554 struct zcrypt_device_status_ext *device_status;
1555 struct ep11_domain_info edi;
1556 struct ep11_card_info eci;
1557 u32 _nr_apqns = 0;
1558 int i, card, dom;
1559
1560 /* occupy the device status memory */
1561 mutex_lock(&dev_status_mem_mutex);
1562 memset(dev_status_mem, 0, ZCRYPT_DEV_STATUS_EXT_SIZE);
1563 device_status = (struct zcrypt_device_status_ext *)dev_status_mem;
1564
1565 /* fetch crypto device status into this struct */
1566 zcrypt_device_status_mask_ext(device_status,
1567 ZCRYPT_DEV_STATUS_CARD_MAX,
1568 ZCRYPT_DEV_STATUS_QUEUE_MAX);
1569
1570 /* walk through all the crypto apqnss */
1571 for (i = 0; i < ZCRYPT_DEV_STATUS_ENTRIES; i++) {
1572 card = AP_QID_CARD(device_status[i].qid);
1573 dom = AP_QID_QUEUE(device_status[i].qid);
1574 /* check online state */
1575 if (!device_status[i].online)
1576 continue;
1577 /* check for ep11 functions */
1578 if (!(device_status[i].functions & 0x01))
1579 continue;
1580 /* check cardnr */
1581 if (cardnr != 0xFFFF && card != cardnr)
1582 continue;
1583 /* check domain */
1584 if (domain != 0xFFFF && dom != domain)
1585 continue;
1586 /* check min hardware type */
1587 if (minhwtype && device_status[i].hwtype < minhwtype)
1588 continue;
1589 /* check min api version if given */
1590 if (minapi > 0) {
1591 if (ep11_get_card_info(card, &eci, xflags))
1592 continue;
1593 if (minapi > eci.API_ord_nr)
1594 continue;
1595 }
1596 /* check wkvp if given */
1597 if (wkvp) {
1598 if (ep11_get_domain_info(card, dom, &edi, xflags))
1599 continue;
1600 if (edi.cur_wk_state != '1')
1601 continue;
1602 if (memcmp(wkvp, edi.cur_wkvp, 16))
1603 continue;
1604 }
1605 /* apqn passed all filtering criterons, add to the array */
1606 if (_nr_apqns < *nr_apqns)
1607 apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom);
1608 }
1609
1610 *nr_apqns = _nr_apqns;
1611
1612 mutex_unlock(&dev_status_mem_mutex);
1613
1614 return _nr_apqns ? 0 : -ENODEV;
1615}
1616EXPORT_SYMBOL(ep11_findcard2);
1617
1618int __init zcrypt_ep11misc_init(void)
1619{
1620 /* Pre-allocate a small memory pool for ep11 cprbs. */
1621 cprb_mempool = mempool_create_kmalloc_pool(2 * zcrypt_mempool_threshold,
1622 CPRB_MEMPOOL_ITEM_SIZE);
1623 if (!cprb_mempool)
1624 return -ENOMEM;
1625
1626 /* Pre-allocate one crypto status card struct used in ep11_findcard2() */
1627 dev_status_mem = kvmalloc(ZCRYPT_DEV_STATUS_EXT_SIZE, GFP_KERNEL);
1628 if (!dev_status_mem) {
1629 mempool_destroy(cprb_mempool);
1630 return -ENOMEM;
1631 }
1632
1633 return 0;
1634}
1635
1636void zcrypt_ep11misc_exit(void)
1637{
1638 mutex_lock(&dev_status_mem_mutex);
1639 kvfree(dev_status_mem);
1640 mutex_unlock(&dev_status_mem_mutex);
1641 mempool_destroy(cprb_mempool);
1642}