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