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 /* default iv used here */
33 static const u8 def_iv[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
34 			       0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };
35 
36 /* ep11 card info cache */
37 struct card_list_entry {
38 	struct list_head list;
39 	u16 cardnr;
40 	struct ep11_card_info info;
41 };
42 static LIST_HEAD(card_list);
43 static DEFINE_SPINLOCK(card_list_lock);
44 
card_cache_fetch(u16 cardnr,struct ep11_card_info * ci)45 static int card_cache_fetch(u16 cardnr, struct ep11_card_info *ci)
46 {
47 	int rc = -ENOENT;
48 	struct card_list_entry *ptr;
49 
50 	spin_lock_bh(&card_list_lock);
51 	list_for_each_entry(ptr, &card_list, list) {
52 		if (ptr->cardnr == cardnr) {
53 			memcpy(ci, &ptr->info, sizeof(*ci));
54 			rc = 0;
55 			break;
56 		}
57 	}
58 	spin_unlock_bh(&card_list_lock);
59 
60 	return rc;
61 }
62 
card_cache_update(u16 cardnr,const struct ep11_card_info * ci)63 static void card_cache_update(u16 cardnr, const struct ep11_card_info *ci)
64 {
65 	int found = 0;
66 	struct card_list_entry *ptr;
67 
68 	spin_lock_bh(&card_list_lock);
69 	list_for_each_entry(ptr, &card_list, list) {
70 		if (ptr->cardnr == cardnr) {
71 			memcpy(&ptr->info, ci, sizeof(*ci));
72 			found = 1;
73 			break;
74 		}
75 	}
76 	if (!found) {
77 		ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
78 		if (!ptr) {
79 			spin_unlock_bh(&card_list_lock);
80 			return;
81 		}
82 		ptr->cardnr = cardnr;
83 		memcpy(&ptr->info, ci, sizeof(*ci));
84 		list_add(&ptr->list, &card_list);
85 	}
86 	spin_unlock_bh(&card_list_lock);
87 }
88 
card_cache_scrub(u16 cardnr)89 static void card_cache_scrub(u16 cardnr)
90 {
91 	struct card_list_entry *ptr;
92 
93 	spin_lock_bh(&card_list_lock);
94 	list_for_each_entry(ptr, &card_list, list) {
95 		if (ptr->cardnr == cardnr) {
96 			list_del(&ptr->list);
97 			kfree(ptr);
98 			break;
99 		}
100 	}
101 	spin_unlock_bh(&card_list_lock);
102 }
103 
card_cache_free(void)104 static void __exit card_cache_free(void)
105 {
106 	struct card_list_entry *ptr, *pnext;
107 
108 	spin_lock_bh(&card_list_lock);
109 	list_for_each_entry_safe(ptr, pnext, &card_list, list) {
110 		list_del(&ptr->list);
111 		kfree(ptr);
112 	}
113 	spin_unlock_bh(&card_list_lock);
114 }
115 
116 /*
117  * Simple check if the key blob is a valid EP11 AES key blob with header.
118  */
ep11_check_aes_key_with_hdr(debug_info_t * dbg,int dbflvl,const u8 * key,size_t keylen,int checkcpacfexp)119 int ep11_check_aes_key_with_hdr(debug_info_t *dbg, int dbflvl,
120 				const u8 *key, size_t keylen, int checkcpacfexp)
121 {
122 	struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
123 	struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
124 
125 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
126 
127 	if (keylen < sizeof(*hdr) + sizeof(*kb)) {
128 		DBF("%s key check failed, keylen %zu < %zu\n",
129 		    __func__, keylen, sizeof(*hdr) + sizeof(*kb));
130 		return -EINVAL;
131 	}
132 
133 	if (hdr->type != TOKTYPE_NON_CCA) {
134 		if (dbg)
135 			DBF("%s key check failed, type 0x%02x != 0x%02x\n",
136 			    __func__, (int)hdr->type, TOKTYPE_NON_CCA);
137 		return -EINVAL;
138 	}
139 	if (hdr->hver != 0x00) {
140 		if (dbg)
141 			DBF("%s key check failed, header version 0x%02x != 0x00\n",
142 			    __func__, (int)hdr->hver);
143 		return -EINVAL;
144 	}
145 	if (hdr->version != TOKVER_EP11_AES_WITH_HEADER) {
146 		if (dbg)
147 			DBF("%s key check failed, version 0x%02x != 0x%02x\n",
148 			    __func__, (int)hdr->version, TOKVER_EP11_AES_WITH_HEADER);
149 		return -EINVAL;
150 	}
151 	if (hdr->len > keylen) {
152 		if (dbg)
153 			DBF("%s key check failed, header len %d keylen %zu mismatch\n",
154 			    __func__, (int)hdr->len, keylen);
155 		return -EINVAL;
156 	}
157 	if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
158 		if (dbg)
159 			DBF("%s key check failed, header len %d < %zu\n",
160 			    __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
161 		return -EINVAL;
162 	}
163 
164 	if (kb->version != EP11_STRUCT_MAGIC) {
165 		if (dbg)
166 			DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
167 			    __func__, (int)kb->version, EP11_STRUCT_MAGIC);
168 		return -EINVAL;
169 	}
170 	if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
171 		if (dbg)
172 			DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
173 			    __func__);
174 		return -EINVAL;
175 	}
176 
177 #undef DBF
178 
179 	return 0;
180 }
181 EXPORT_SYMBOL(ep11_check_aes_key_with_hdr);
182 
183 /*
184  * Simple check if the key blob is a valid EP11 ECC key blob with header.
185  */
ep11_check_ecc_key_with_hdr(debug_info_t * dbg,int dbflvl,const u8 * key,size_t keylen,int checkcpacfexp)186 int ep11_check_ecc_key_with_hdr(debug_info_t *dbg, int dbflvl,
187 				const u8 *key, size_t keylen, int checkcpacfexp)
188 {
189 	struct ep11kblob_header *hdr = (struct ep11kblob_header *)key;
190 	struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr));
191 
192 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
193 
194 	if (keylen < sizeof(*hdr) + sizeof(*kb)) {
195 		DBF("%s key check failed, keylen %zu < %zu\n",
196 		    __func__, keylen, sizeof(*hdr) + sizeof(*kb));
197 		return -EINVAL;
198 	}
199 
200 	if (hdr->type != TOKTYPE_NON_CCA) {
201 		if (dbg)
202 			DBF("%s key check failed, type 0x%02x != 0x%02x\n",
203 			    __func__, (int)hdr->type, TOKTYPE_NON_CCA);
204 		return -EINVAL;
205 	}
206 	if (hdr->hver != 0x00) {
207 		if (dbg)
208 			DBF("%s key check failed, header version 0x%02x != 0x00\n",
209 			    __func__, (int)hdr->hver);
210 		return -EINVAL;
211 	}
212 	if (hdr->version != TOKVER_EP11_ECC_WITH_HEADER) {
213 		if (dbg)
214 			DBF("%s key check failed, version 0x%02x != 0x%02x\n",
215 			    __func__, (int)hdr->version, TOKVER_EP11_ECC_WITH_HEADER);
216 		return -EINVAL;
217 	}
218 	if (hdr->len > keylen) {
219 		if (dbg)
220 			DBF("%s key check failed, header len %d keylen %zu mismatch\n",
221 			    __func__, (int)hdr->len, keylen);
222 		return -EINVAL;
223 	}
224 	if (hdr->len < sizeof(*hdr) + sizeof(*kb)) {
225 		if (dbg)
226 			DBF("%s key check failed, header len %d < %zu\n",
227 			    __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb));
228 		return -EINVAL;
229 	}
230 
231 	if (kb->version != EP11_STRUCT_MAGIC) {
232 		if (dbg)
233 			DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
234 			    __func__, (int)kb->version, EP11_STRUCT_MAGIC);
235 		return -EINVAL;
236 	}
237 	if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
238 		if (dbg)
239 			DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
240 			    __func__);
241 		return -EINVAL;
242 	}
243 
244 #undef DBF
245 
246 	return 0;
247 }
248 EXPORT_SYMBOL(ep11_check_ecc_key_with_hdr);
249 
250 /*
251  * Simple check if the key blob is a valid EP11 AES key blob with
252  * the header in the session field (old style EP11 AES key).
253  */
ep11_check_aes_key(debug_info_t * dbg,int dbflvl,const u8 * key,size_t keylen,int checkcpacfexp)254 int ep11_check_aes_key(debug_info_t *dbg, int dbflvl,
255 		       const u8 *key, size_t keylen, int checkcpacfexp)
256 {
257 	struct ep11keyblob *kb = (struct ep11keyblob *)key;
258 
259 #define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
260 
261 	if (keylen < sizeof(*kb)) {
262 		DBF("%s key check failed, keylen %zu < %zu\n",
263 		    __func__, keylen, sizeof(*kb));
264 		return -EINVAL;
265 	}
266 
267 	if (kb->head.type != TOKTYPE_NON_CCA) {
268 		if (dbg)
269 			DBF("%s key check failed, type 0x%02x != 0x%02x\n",
270 			    __func__, (int)kb->head.type, TOKTYPE_NON_CCA);
271 		return -EINVAL;
272 	}
273 	if (kb->head.version != TOKVER_EP11_AES) {
274 		if (dbg)
275 			DBF("%s key check failed, version 0x%02x != 0x%02x\n",
276 			    __func__, (int)kb->head.version, TOKVER_EP11_AES);
277 		return -EINVAL;
278 	}
279 	if (kb->head.len > keylen) {
280 		if (dbg)
281 			DBF("%s key check failed, header len %d keylen %zu mismatch\n",
282 			    __func__, (int)kb->head.len, keylen);
283 		return -EINVAL;
284 	}
285 	if (kb->head.len < sizeof(*kb)) {
286 		if (dbg)
287 			DBF("%s key check failed, header len %d < %zu\n",
288 			    __func__, (int)kb->head.len, sizeof(*kb));
289 		return -EINVAL;
290 	}
291 
292 	if (kb->version != EP11_STRUCT_MAGIC) {
293 		if (dbg)
294 			DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n",
295 			    __func__, (int)kb->version, EP11_STRUCT_MAGIC);
296 		return -EINVAL;
297 	}
298 	if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
299 		if (dbg)
300 			DBF("%s key check failed, PKEY_EXTRACTABLE is off\n",
301 			    __func__);
302 		return -EINVAL;
303 	}
304 
305 #undef DBF
306 
307 	return 0;
308 }
309 EXPORT_SYMBOL(ep11_check_aes_key);
310 
311 /*
312  * Allocate and prepare ep11 cprb plus additional payload.
313  */
alloc_cprb(size_t payload_len)314 static inline struct ep11_cprb *alloc_cprb(size_t payload_len)
315 {
316 	size_t len = sizeof(struct ep11_cprb) + payload_len;
317 	struct ep11_cprb *cprb;
318 
319 	cprb = kzalloc(len, GFP_KERNEL);
320 	if (!cprb)
321 		return NULL;
322 
323 	cprb->cprb_len = sizeof(struct ep11_cprb);
324 	cprb->cprb_ver_id = 0x04;
325 	memcpy(cprb->func_id, "T4", 2);
326 	cprb->ret_code = 0xFFFFFFFF;
327 	cprb->payload_len = payload_len;
328 
329 	return cprb;
330 }
331 
332 /*
333  * Some helper functions related to ASN1 encoding.
334  * Limited to length info <= 2 byte.
335  */
336 
337 #define ASN1TAGLEN(x) (2 + (x) + ((x) > 127 ? 1 : 0) + ((x) > 255 ? 1 : 0))
338 
asn1tag_write(u8 * ptr,u8 tag,const u8 * pvalue,u16 valuelen)339 static int asn1tag_write(u8 *ptr, u8 tag, const u8 *pvalue, u16 valuelen)
340 {
341 	ptr[0] = tag;
342 	if (valuelen > 255) {
343 		ptr[1] = 0x82;
344 		*((u16 *)(ptr + 2)) = valuelen;
345 		memcpy(ptr + 4, pvalue, valuelen);
346 		return 4 + valuelen;
347 	}
348 	if (valuelen > 127) {
349 		ptr[1] = 0x81;
350 		ptr[2] = (u8)valuelen;
351 		memcpy(ptr + 3, pvalue, valuelen);
352 		return 3 + valuelen;
353 	}
354 	ptr[1] = (u8)valuelen;
355 	memcpy(ptr + 2, pvalue, valuelen);
356 	return 2 + valuelen;
357 }
358 
359 /* EP11 payload > 127 bytes starts with this struct */
360 struct pl_head {
361 	u8  tag;
362 	u8  lenfmt;
363 	u16 len;
364 	u8  func_tag;
365 	u8  func_len;
366 	u32 func;
367 	u8  dom_tag;
368 	u8  dom_len;
369 	u32 dom;
370 } __packed;
371 
372 /* prep ep11 payload head helper function */
prep_head(struct pl_head * h,size_t pl_size,int api,int func)373 static inline void prep_head(struct pl_head *h,
374 			     size_t pl_size, int api, int func)
375 {
376 	h->tag = 0x30;
377 	h->lenfmt = 0x82;
378 	h->len = pl_size - 4;
379 	h->func_tag = 0x04;
380 	h->func_len = sizeof(u32);
381 	h->func = (api << 16) + func;
382 	h->dom_tag = 0x04;
383 	h->dom_len = sizeof(u32);
384 }
385 
386 /* 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)387 static inline void prep_urb(struct ep11_urb *u,
388 			    struct ep11_target_dev *t, int nt,
389 			    struct ep11_cprb *req, size_t req_len,
390 			    struct ep11_cprb *rep, size_t rep_len)
391 {
392 	u->targets = (u8 __user *)t;
393 	u->targets_num = nt;
394 	u->req = (u8 __user *)req;
395 	u->req_len = req_len;
396 	u->resp = (u8 __user *)rep;
397 	u->resp_len = rep_len;
398 }
399 
400 /* Check ep11 reply payload, return 0 or suggested errno value. */
check_reply_pl(const u8 * pl,const char * func)401 static int check_reply_pl(const u8 *pl, const char *func)
402 {
403 	int len;
404 	u32 ret;
405 
406 	/* start tag */
407 	if (*pl++ != 0x30) {
408 		DEBUG_ERR("%s reply start tag mismatch\n", func);
409 		return -EIO;
410 	}
411 
412 	/* payload length format */
413 	if (*pl < 127) {
414 		len = *pl;
415 		pl++;
416 	} else if (*pl == 0x81) {
417 		pl++;
418 		len = *pl;
419 		pl++;
420 	} else if (*pl == 0x82) {
421 		pl++;
422 		len = *((u16 *)pl);
423 		pl += 2;
424 	} else {
425 		DEBUG_ERR("%s reply start tag lenfmt mismatch 0x%02hhx\n",
426 			  func, *pl);
427 		return -EIO;
428 	}
429 
430 	/* len should cover at least 3 fields with 32 bit value each */
431 	if (len < 3 * 6) {
432 		DEBUG_ERR("%s reply length %d too small\n", func, len);
433 		return -EIO;
434 	}
435 
436 	/* function tag, length and value */
437 	if (pl[0] != 0x04 || pl[1] != 0x04) {
438 		DEBUG_ERR("%s function tag or length mismatch\n", func);
439 		return -EIO;
440 	}
441 	pl += 6;
442 
443 	/* dom tag, length and value */
444 	if (pl[0] != 0x04 || pl[1] != 0x04) {
445 		DEBUG_ERR("%s dom tag or length mismatch\n", func);
446 		return -EIO;
447 	}
448 	pl += 6;
449 
450 	/* return value tag, length and value */
451 	if (pl[0] != 0x04 || pl[1] != 0x04) {
452 		DEBUG_ERR("%s return value tag or length mismatch\n", func);
453 		return -EIO;
454 	}
455 	pl += 2;
456 	ret = *((u32 *)pl);
457 	if (ret != 0) {
458 		DEBUG_ERR("%s return value 0x%04x != 0\n", func, ret);
459 		return -EIO;
460 	}
461 
462 	return 0;
463 }
464 
465 /*
466  * Helper function which does an ep11 query with given query type.
467  */
ep11_query_info(u16 cardnr,u16 domain,u32 query_type,size_t buflen,u8 * buf)468 static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type,
469 			   size_t buflen, u8 *buf)
470 {
471 	struct ep11_info_req_pl {
472 		struct pl_head head;
473 		u8  query_type_tag;
474 		u8  query_type_len;
475 		u32 query_type;
476 		u8  query_subtype_tag;
477 		u8  query_subtype_len;
478 		u32 query_subtype;
479 	} __packed * req_pl;
480 	struct ep11_info_rep_pl {
481 		struct pl_head head;
482 		u8  rc_tag;
483 		u8  rc_len;
484 		u32 rc;
485 		u8  data_tag;
486 		u8  data_lenfmt;
487 		u16 data_len;
488 	} __packed * rep_pl;
489 	struct ep11_cprb *req = NULL, *rep = NULL;
490 	struct ep11_target_dev target;
491 	struct ep11_urb *urb = NULL;
492 	int api = 1, rc = -ENOMEM;
493 
494 	/* request cprb and payload */
495 	req = alloc_cprb(sizeof(struct ep11_info_req_pl));
496 	if (!req)
497 		goto out;
498 	req_pl = (struct ep11_info_req_pl *)(((u8 *)req) + sizeof(*req));
499 	prep_head(&req_pl->head, sizeof(*req_pl), api, 38); /* get xcp info */
500 	req_pl->query_type_tag = 0x04;
501 	req_pl->query_type_len = sizeof(u32);
502 	req_pl->query_type = query_type;
503 	req_pl->query_subtype_tag = 0x04;
504 	req_pl->query_subtype_len = sizeof(u32);
505 
506 	/* reply cprb and payload */
507 	rep = alloc_cprb(sizeof(struct ep11_info_rep_pl) + buflen);
508 	if (!rep)
509 		goto out;
510 	rep_pl = (struct ep11_info_rep_pl *)(((u8 *)rep) + sizeof(*rep));
511 
512 	/* urb and target */
513 	urb = kmalloc(sizeof(*urb), GFP_KERNEL);
514 	if (!urb)
515 		goto out;
516 	target.ap_id = cardnr;
517 	target.dom_id = domain;
518 	prep_urb(urb, &target, 1,
519 		 req, sizeof(*req) + sizeof(*req_pl),
520 		 rep, sizeof(*rep) + sizeof(*rep_pl) + buflen);
521 
522 	rc = zcrypt_send_ep11_cprb(urb);
523 	if (rc) {
524 		DEBUG_ERR(
525 			"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
526 			__func__, (int)cardnr, (int)domain, rc);
527 		goto out;
528 	}
529 
530 	rc = check_reply_pl((u8 *)rep_pl, __func__);
531 	if (rc)
532 		goto out;
533 	if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
534 		DEBUG_ERR("%s unknown reply data format\n", __func__);
535 		rc = -EIO;
536 		goto out;
537 	}
538 	if (rep_pl->data_len > buflen) {
539 		DEBUG_ERR("%s mismatch between reply data len and buffer len\n",
540 			  __func__);
541 		rc = -ENOSPC;
542 		goto out;
543 	}
544 
545 	memcpy(buf, ((u8 *)rep_pl) + sizeof(*rep_pl), rep_pl->data_len);
546 
547 out:
548 	kfree(req);
549 	kfree(rep);
550 	kfree(urb);
551 	return rc;
552 }
553 
554 /*
555  * Provide information about an EP11 card.
556  */
ep11_get_card_info(u16 card,struct ep11_card_info * info,int verify)557 int ep11_get_card_info(u16 card, struct ep11_card_info *info, int verify)
558 {
559 	int rc;
560 	struct ep11_module_query_info {
561 		u32 API_ord_nr;
562 		u32 firmware_id;
563 		u8  FW_major_vers;
564 		u8  FW_minor_vers;
565 		u8  CSP_major_vers;
566 		u8  CSP_minor_vers;
567 		u8  fwid[32];
568 		u8  xcp_config_hash[32];
569 		u8  CSP_config_hash[32];
570 		u8  serial[16];
571 		u8  module_date_time[16];
572 		u64 op_mode;
573 		u32 PKCS11_flags;
574 		u32 ext_flags;
575 		u32 domains;
576 		u32 sym_state_bytes;
577 		u32 digest_state_bytes;
578 		u32 pin_blob_bytes;
579 		u32 SPKI_bytes;
580 		u32 priv_key_blob_bytes;
581 		u32 sym_blob_bytes;
582 		u32 max_payload_bytes;
583 		u32 CP_profile_bytes;
584 		u32 max_CP_index;
585 	} __packed * pmqi = NULL;
586 
587 	rc = card_cache_fetch(card, info);
588 	if (rc || verify) {
589 		pmqi = kmalloc(sizeof(*pmqi), GFP_KERNEL);
590 		if (!pmqi)
591 			return -ENOMEM;
592 		rc = ep11_query_info(card, AUTOSEL_DOM,
593 				     0x01 /* module info query */,
594 				     sizeof(*pmqi), (u8 *)pmqi);
595 		if (rc) {
596 			if (rc == -ENODEV)
597 				card_cache_scrub(card);
598 			goto out;
599 		}
600 		memset(info, 0, sizeof(*info));
601 		info->API_ord_nr = pmqi->API_ord_nr;
602 		info->FW_version =
603 			(pmqi->FW_major_vers << 8) + pmqi->FW_minor_vers;
604 		memcpy(info->serial, pmqi->serial, sizeof(info->serial));
605 		info->op_mode = pmqi->op_mode;
606 		card_cache_update(card, info);
607 	}
608 
609 out:
610 	kfree(pmqi);
611 	return rc;
612 }
613 EXPORT_SYMBOL(ep11_get_card_info);
614 
615 /*
616  * Provide information about a domain within an EP11 card.
617  */
ep11_get_domain_info(u16 card,u16 domain,struct ep11_domain_info * info)618 int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info)
619 {
620 	int rc;
621 	struct ep11_domain_query_info {
622 		u32 dom_index;
623 		u8  cur_WK_VP[32];
624 		u8  new_WK_VP[32];
625 		u32 dom_flags;
626 		u64 op_mode;
627 	} __packed * p_dom_info;
628 
629 	p_dom_info = kmalloc(sizeof(*p_dom_info), GFP_KERNEL);
630 	if (!p_dom_info)
631 		return -ENOMEM;
632 
633 	rc = ep11_query_info(card, domain, 0x03 /* domain info query */,
634 			     sizeof(*p_dom_info), (u8 *)p_dom_info);
635 	if (rc)
636 		goto out;
637 
638 	memset(info, 0, sizeof(*info));
639 	info->cur_wk_state = '0';
640 	info->new_wk_state = '0';
641 	if (p_dom_info->dom_flags & 0x10 /* left imprint mode */) {
642 		if (p_dom_info->dom_flags & 0x02 /* cur wk valid */) {
643 			info->cur_wk_state = '1';
644 			memcpy(info->cur_wkvp, p_dom_info->cur_WK_VP, 32);
645 		}
646 		if (p_dom_info->dom_flags & 0x04 || /* new wk present */
647 		    p_dom_info->dom_flags & 0x08 /* new wk committed */) {
648 			info->new_wk_state =
649 				p_dom_info->dom_flags & 0x08 ? '2' : '1';
650 			memcpy(info->new_wkvp, p_dom_info->new_WK_VP, 32);
651 		}
652 	}
653 	info->op_mode = p_dom_info->op_mode;
654 
655 out:
656 	kfree(p_dom_info);
657 	return rc;
658 }
659 EXPORT_SYMBOL(ep11_get_domain_info);
660 
661 /*
662  * Default EP11 AES key generate attributes, used when no keygenflags given:
663  * XCP_BLOB_ENCRYPT | XCP_BLOB_DECRYPT | XCP_BLOB_PROTKEY_EXTRACTABLE
664  */
665 #define KEY_ATTR_DEFAULTS 0x00200c00
666 
ep11_genaeskey(u16 card,u16 domain,u32 keybitsize,u32 keygenflags,u8 * keybuf,size_t * keybufsize)667 int ep11_genaeskey(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
668 		   u8 *keybuf, size_t *keybufsize)
669 {
670 	struct keygen_req_pl {
671 		struct pl_head head;
672 		u8  var_tag;
673 		u8  var_len;
674 		u32 var;
675 		u8  keybytes_tag;
676 		u8  keybytes_len;
677 		u32 keybytes;
678 		u8  mech_tag;
679 		u8  mech_len;
680 		u32 mech;
681 		u8  attr_tag;
682 		u8  attr_len;
683 		u32 attr_header;
684 		u32 attr_bool_mask;
685 		u32 attr_bool_bits;
686 		u32 attr_val_len_type;
687 		u32 attr_val_len_value;
688 		u8  pin_tag;
689 		u8  pin_len;
690 	} __packed * req_pl;
691 	struct keygen_rep_pl {
692 		struct pl_head head;
693 		u8  rc_tag;
694 		u8  rc_len;
695 		u32 rc;
696 		u8  data_tag;
697 		u8  data_lenfmt;
698 		u16 data_len;
699 		u8  data[512];
700 	} __packed * rep_pl;
701 	struct ep11_cprb *req = NULL, *rep = NULL;
702 	struct ep11_target_dev target;
703 	struct ep11_urb *urb = NULL;
704 	struct ep11keyblob *kb;
705 	int api, rc = -ENOMEM;
706 
707 	switch (keybitsize) {
708 	case 128:
709 	case 192:
710 	case 256:
711 		break;
712 	default:
713 		DEBUG_ERR(
714 			"%s unknown/unsupported keybitsize %d\n",
715 			__func__, keybitsize);
716 		rc = -EINVAL;
717 		goto out;
718 	}
719 
720 	/* request cprb and payload */
721 	req = alloc_cprb(sizeof(struct keygen_req_pl));
722 	if (!req)
723 		goto out;
724 	req_pl = (struct keygen_req_pl *)(((u8 *)req) + sizeof(*req));
725 	api = (!keygenflags || keygenflags & 0x00200000) ? 4 : 1;
726 	prep_head(&req_pl->head, sizeof(*req_pl), api, 21); /* GenerateKey */
727 	req_pl->var_tag = 0x04;
728 	req_pl->var_len = sizeof(u32);
729 	req_pl->keybytes_tag = 0x04;
730 	req_pl->keybytes_len = sizeof(u32);
731 	req_pl->keybytes = keybitsize / 8;
732 	req_pl->mech_tag = 0x04;
733 	req_pl->mech_len = sizeof(u32);
734 	req_pl->mech = 0x00001080; /* CKM_AES_KEY_GEN */
735 	req_pl->attr_tag = 0x04;
736 	req_pl->attr_len = 5 * sizeof(u32);
737 	req_pl->attr_header = 0x10010000;
738 	req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
739 	req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
740 	req_pl->attr_val_len_type = 0x00000161; /* CKA_VALUE_LEN */
741 	req_pl->attr_val_len_value = keybitsize / 8;
742 	req_pl->pin_tag = 0x04;
743 
744 	/* reply cprb and payload */
745 	rep = alloc_cprb(sizeof(struct keygen_rep_pl));
746 	if (!rep)
747 		goto out;
748 	rep_pl = (struct keygen_rep_pl *)(((u8 *)rep) + sizeof(*rep));
749 
750 	/* urb and target */
751 	urb = kmalloc(sizeof(*urb), GFP_KERNEL);
752 	if (!urb)
753 		goto out;
754 	target.ap_id = card;
755 	target.dom_id = domain;
756 	prep_urb(urb, &target, 1,
757 		 req, sizeof(*req) + sizeof(*req_pl),
758 		 rep, sizeof(*rep) + sizeof(*rep_pl));
759 
760 	rc = zcrypt_send_ep11_cprb(urb);
761 	if (rc) {
762 		DEBUG_ERR(
763 			"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
764 			__func__, (int)card, (int)domain, rc);
765 		goto out;
766 	}
767 
768 	rc = check_reply_pl((u8 *)rep_pl, __func__);
769 	if (rc)
770 		goto out;
771 	if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
772 		DEBUG_ERR("%s unknown reply data format\n", __func__);
773 		rc = -EIO;
774 		goto out;
775 	}
776 	if (rep_pl->data_len > *keybufsize) {
777 		DEBUG_ERR("%s mismatch reply data len / key buffer len\n",
778 			  __func__);
779 		rc = -ENOSPC;
780 		goto out;
781 	}
782 
783 	/* copy key blob and set header values */
784 	memcpy(keybuf, rep_pl->data, rep_pl->data_len);
785 	*keybufsize = rep_pl->data_len;
786 	kb = (struct ep11keyblob *)keybuf;
787 	kb->head.type = TOKTYPE_NON_CCA;
788 	kb->head.len = rep_pl->data_len;
789 	kb->head.version = TOKVER_EP11_AES;
790 	kb->head.keybitlen = keybitsize;
791 
792 out:
793 	kfree(req);
794 	kfree(rep);
795 	kfree(urb);
796 	return rc;
797 }
798 EXPORT_SYMBOL(ep11_genaeskey);
799 
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)800 static int ep11_cryptsingle(u16 card, u16 domain,
801 			    u16 mode, u32 mech, const u8 *iv,
802 			    const u8 *key, size_t keysize,
803 			    const u8 *inbuf, size_t inbufsize,
804 			    u8 *outbuf, size_t *outbufsize)
805 {
806 	struct crypt_req_pl {
807 		struct pl_head head;
808 		u8  var_tag;
809 		u8  var_len;
810 		u32 var;
811 		u8  mech_tag;
812 		u8  mech_len;
813 		u32 mech;
814 		/*
815 		 * maybe followed by iv data
816 		 * followed by key tag + key blob
817 		 * followed by plaintext tag + plaintext
818 		 */
819 	} __packed * req_pl;
820 	struct crypt_rep_pl {
821 		struct pl_head head;
822 		u8  rc_tag;
823 		u8  rc_len;
824 		u32 rc;
825 		u8  data_tag;
826 		u8  data_lenfmt;
827 		/* data follows */
828 	} __packed * rep_pl;
829 	struct ep11_cprb *req = NULL, *rep = NULL;
830 	struct ep11_target_dev target;
831 	struct ep11_urb *urb = NULL;
832 	size_t req_pl_size, rep_pl_size;
833 	int n, api = 1, rc = -ENOMEM;
834 	u8 *p;
835 
836 	/* the simple asn1 coding used has length limits */
837 	if (keysize > 0xFFFF || inbufsize > 0xFFFF)
838 		return -EINVAL;
839 
840 	/* request cprb and payload */
841 	req_pl_size = sizeof(struct crypt_req_pl) + (iv ? 16 : 0)
842 		+ ASN1TAGLEN(keysize) + ASN1TAGLEN(inbufsize);
843 	req = alloc_cprb(req_pl_size);
844 	if (!req)
845 		goto out;
846 	req_pl = (struct crypt_req_pl *)(((u8 *)req) + sizeof(*req));
847 	prep_head(&req_pl->head, req_pl_size, api, (mode ? 20 : 19));
848 	req_pl->var_tag = 0x04;
849 	req_pl->var_len = sizeof(u32);
850 	/* mech is mech + mech params (iv here) */
851 	req_pl->mech_tag = 0x04;
852 	req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
853 	req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
854 	p = ((u8 *)req_pl) + sizeof(*req_pl);
855 	if (iv) {
856 		memcpy(p, iv, 16);
857 		p += 16;
858 	}
859 	/* key and input data */
860 	p += asn1tag_write(p, 0x04, key, keysize);
861 	p += asn1tag_write(p, 0x04, inbuf, inbufsize);
862 
863 	/* reply cprb and payload, assume out data size <= in data size + 32 */
864 	rep_pl_size = sizeof(struct crypt_rep_pl) + ASN1TAGLEN(inbufsize + 32);
865 	rep = alloc_cprb(rep_pl_size);
866 	if (!rep)
867 		goto out;
868 	rep_pl = (struct crypt_rep_pl *)(((u8 *)rep) + sizeof(*rep));
869 
870 	/* urb and target */
871 	urb = kmalloc(sizeof(*urb), GFP_KERNEL);
872 	if (!urb)
873 		goto out;
874 	target.ap_id = card;
875 	target.dom_id = domain;
876 	prep_urb(urb, &target, 1,
877 		 req, sizeof(*req) + req_pl_size,
878 		 rep, sizeof(*rep) + rep_pl_size);
879 
880 	rc = zcrypt_send_ep11_cprb(urb);
881 	if (rc) {
882 		DEBUG_ERR(
883 			"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
884 			__func__, (int)card, (int)domain, rc);
885 		goto out;
886 	}
887 
888 	rc = check_reply_pl((u8 *)rep_pl, __func__);
889 	if (rc)
890 		goto out;
891 	if (rep_pl->data_tag != 0x04) {
892 		DEBUG_ERR("%s unknown reply data format\n", __func__);
893 		rc = -EIO;
894 		goto out;
895 	}
896 	p = ((u8 *)rep_pl) + sizeof(*rep_pl);
897 	if (rep_pl->data_lenfmt <= 127) {
898 		n = rep_pl->data_lenfmt;
899 	} else if (rep_pl->data_lenfmt == 0x81) {
900 		n = *p++;
901 	} else if (rep_pl->data_lenfmt == 0x82) {
902 		n = *((u16 *)p);
903 		p += 2;
904 	} else {
905 		DEBUG_ERR("%s unknown reply data length format 0x%02hhx\n",
906 			  __func__, rep_pl->data_lenfmt);
907 		rc = -EIO;
908 		goto out;
909 	}
910 	if (n > *outbufsize) {
911 		DEBUG_ERR("%s mismatch reply data len %d / output buffer %zu\n",
912 			  __func__, n, *outbufsize);
913 		rc = -ENOSPC;
914 		goto out;
915 	}
916 
917 	memcpy(outbuf, p, n);
918 	*outbufsize = n;
919 
920 out:
921 	kfree(req);
922 	kfree(rep);
923 	kfree(urb);
924 	return rc;
925 }
926 
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)927 static int ep11_unwrapkey(u16 card, u16 domain,
928 			  const u8 *kek, size_t keksize,
929 			  const u8 *enckey, size_t enckeysize,
930 			  u32 mech, const u8 *iv,
931 			  u32 keybitsize, u32 keygenflags,
932 			  u8 *keybuf, size_t *keybufsize)
933 {
934 	struct uw_req_pl {
935 		struct pl_head head;
936 		u8  attr_tag;
937 		u8  attr_len;
938 		u32 attr_header;
939 		u32 attr_bool_mask;
940 		u32 attr_bool_bits;
941 		u32 attr_key_type;
942 		u32 attr_key_type_value;
943 		u32 attr_val_len;
944 		u32 attr_val_len_value;
945 		u8  mech_tag;
946 		u8  mech_len;
947 		u32 mech;
948 		/*
949 		 * maybe followed by iv data
950 		 * followed by kek tag + kek blob
951 		 * followed by empty mac tag
952 		 * followed by empty pin tag
953 		 * followed by encryted key tag + bytes
954 		 */
955 	} __packed * req_pl;
956 	struct uw_rep_pl {
957 		struct pl_head head;
958 		u8  rc_tag;
959 		u8  rc_len;
960 		u32 rc;
961 		u8  data_tag;
962 		u8  data_lenfmt;
963 		u16 data_len;
964 		u8  data[512];
965 	} __packed * rep_pl;
966 	struct ep11_cprb *req = NULL, *rep = NULL;
967 	struct ep11_target_dev target;
968 	struct ep11_urb *urb = NULL;
969 	struct ep11keyblob *kb;
970 	size_t req_pl_size;
971 	int api, rc = -ENOMEM;
972 	u8 *p;
973 
974 	/* request cprb and payload */
975 	req_pl_size = sizeof(struct uw_req_pl) + (iv ? 16 : 0)
976 		+ ASN1TAGLEN(keksize) + 4 + ASN1TAGLEN(enckeysize);
977 	req = alloc_cprb(req_pl_size);
978 	if (!req)
979 		goto out;
980 	req_pl = (struct uw_req_pl *)(((u8 *)req) + sizeof(*req));
981 	api = (!keygenflags || keygenflags & 0x00200000) ? 4 : 1;
982 	prep_head(&req_pl->head, req_pl_size, api, 34); /* UnwrapKey */
983 	req_pl->attr_tag = 0x04;
984 	req_pl->attr_len = 7 * sizeof(u32);
985 	req_pl->attr_header = 0x10020000;
986 	req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
987 	req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
988 	req_pl->attr_key_type = 0x00000100; /* CKA_KEY_TYPE */
989 	req_pl->attr_key_type_value = 0x0000001f; /* CKK_AES */
990 	req_pl->attr_val_len = 0x00000161; /* CKA_VALUE_LEN */
991 	req_pl->attr_val_len_value = keybitsize / 8;
992 	/* mech is mech + mech params (iv here) */
993 	req_pl->mech_tag = 0x04;
994 	req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
995 	req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
996 	p = ((u8 *)req_pl) + sizeof(*req_pl);
997 	if (iv) {
998 		memcpy(p, iv, 16);
999 		p += 16;
1000 	}
1001 	/* kek */
1002 	p += asn1tag_write(p, 0x04, kek, keksize);
1003 	/* empty mac key tag */
1004 	*p++ = 0x04;
1005 	*p++ = 0;
1006 	/* empty pin tag */
1007 	*p++ = 0x04;
1008 	*p++ = 0;
1009 	/* encrypted key value tag and bytes */
1010 	p += asn1tag_write(p, 0x04, enckey, enckeysize);
1011 
1012 	/* reply cprb and payload */
1013 	rep = alloc_cprb(sizeof(struct uw_rep_pl));
1014 	if (!rep)
1015 		goto out;
1016 	rep_pl = (struct uw_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1017 
1018 	/* urb and target */
1019 	urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1020 	if (!urb)
1021 		goto out;
1022 	target.ap_id = card;
1023 	target.dom_id = domain;
1024 	prep_urb(urb, &target, 1,
1025 		 req, sizeof(*req) + req_pl_size,
1026 		 rep, sizeof(*rep) + sizeof(*rep_pl));
1027 
1028 	rc = zcrypt_send_ep11_cprb(urb);
1029 	if (rc) {
1030 		DEBUG_ERR(
1031 			"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1032 			__func__, (int)card, (int)domain, rc);
1033 		goto out;
1034 	}
1035 
1036 	rc = check_reply_pl((u8 *)rep_pl, __func__);
1037 	if (rc)
1038 		goto out;
1039 	if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1040 		DEBUG_ERR("%s unknown reply data format\n", __func__);
1041 		rc = -EIO;
1042 		goto out;
1043 	}
1044 	if (rep_pl->data_len > *keybufsize) {
1045 		DEBUG_ERR("%s mismatch reply data len / key buffer len\n",
1046 			  __func__);
1047 		rc = -ENOSPC;
1048 		goto out;
1049 	}
1050 
1051 	/* copy key blob and set header values */
1052 	memcpy(keybuf, rep_pl->data, rep_pl->data_len);
1053 	*keybufsize = rep_pl->data_len;
1054 	kb = (struct ep11keyblob *)keybuf;
1055 	kb->head.type = TOKTYPE_NON_CCA;
1056 	kb->head.len = rep_pl->data_len;
1057 	kb->head.version = TOKVER_EP11_AES;
1058 	kb->head.keybitlen = keybitsize;
1059 
1060 out:
1061 	kfree(req);
1062 	kfree(rep);
1063 	kfree(urb);
1064 	return rc;
1065 }
1066 
ep11_wrapkey(u16 card,u16 domain,const u8 * key,size_t keysize,u32 mech,const u8 * iv,u8 * databuf,size_t * datasize)1067 static int ep11_wrapkey(u16 card, u16 domain,
1068 			const u8 *key, size_t keysize,
1069 			u32 mech, const u8 *iv,
1070 			u8 *databuf, size_t *datasize)
1071 {
1072 	struct wk_req_pl {
1073 		struct pl_head head;
1074 		u8  var_tag;
1075 		u8  var_len;
1076 		u32 var;
1077 		u8  mech_tag;
1078 		u8  mech_len;
1079 		u32 mech;
1080 		/*
1081 		 * followed by iv data
1082 		 * followed by key tag + key blob
1083 		 * followed by dummy kek param
1084 		 * followed by dummy mac param
1085 		 */
1086 	} __packed * req_pl;
1087 	struct wk_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[1024];
1096 	} __packed * rep_pl;
1097 	struct ep11_cprb *req = NULL, *rep = NULL;
1098 	struct ep11_target_dev target;
1099 	struct ep11_urb *urb = NULL;
1100 	struct ep11keyblob *kb;
1101 	size_t req_pl_size;
1102 	int api, rc = -ENOMEM;
1103 	bool has_header = false;
1104 	u8 *p;
1105 
1106 	/* maybe the session field holds a header with key info */
1107 	kb = (struct ep11keyblob *)key;
1108 	if (kb->head.type == TOKTYPE_NON_CCA &&
1109 	    kb->head.version == TOKVER_EP11_AES) {
1110 		has_header = true;
1111 		keysize = min_t(size_t, kb->head.len, keysize);
1112 	}
1113 
1114 	/* request cprb and payload */
1115 	req_pl_size = sizeof(struct wk_req_pl) + (iv ? 16 : 0)
1116 		+ ASN1TAGLEN(keysize) + 4;
1117 	req = alloc_cprb(req_pl_size);
1118 	if (!req)
1119 		goto out;
1120 	if (!mech || mech == 0x80060001)
1121 		req->flags |= 0x20; /* CPACF_WRAP needs special bit */
1122 	req_pl = (struct wk_req_pl *)(((u8 *)req) + sizeof(*req));
1123 	api = (!mech || mech == 0x80060001) ? 4 : 1; /* CKM_IBM_CPACF_WRAP */
1124 	prep_head(&req_pl->head, req_pl_size, api, 33); /* WrapKey */
1125 	req_pl->var_tag = 0x04;
1126 	req_pl->var_len = sizeof(u32);
1127 	/* mech is mech + mech params (iv here) */
1128 	req_pl->mech_tag = 0x04;
1129 	req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
1130 	req_pl->mech = (mech ? mech : 0x80060001); /* CKM_IBM_CPACF_WRAP */
1131 	p = ((u8 *)req_pl) + sizeof(*req_pl);
1132 	if (iv) {
1133 		memcpy(p, iv, 16);
1134 		p += 16;
1135 	}
1136 	/* key blob */
1137 	p += asn1tag_write(p, 0x04, key, keysize);
1138 	/* maybe the key argument needs the head data cleaned out */
1139 	if (has_header) {
1140 		kb = (struct ep11keyblob *)(p - keysize);
1141 		memset(&kb->head, 0, sizeof(kb->head));
1142 	}
1143 	/* empty kek tag */
1144 	*p++ = 0x04;
1145 	*p++ = 0;
1146 	/* empty mac tag */
1147 	*p++ = 0x04;
1148 	*p++ = 0;
1149 
1150 	/* reply cprb and payload */
1151 	rep = alloc_cprb(sizeof(struct wk_rep_pl));
1152 	if (!rep)
1153 		goto out;
1154 	rep_pl = (struct wk_rep_pl *)(((u8 *)rep) + sizeof(*rep));
1155 
1156 	/* urb and target */
1157 	urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1158 	if (!urb)
1159 		goto out;
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);
1167 	if (rc) {
1168 		DEBUG_ERR(
1169 			"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
1170 			__func__, (int)card, (int)domain, rc);
1171 		goto out;
1172 	}
1173 
1174 	rc = check_reply_pl((u8 *)rep_pl, __func__);
1175 	if (rc)
1176 		goto out;
1177 	if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
1178 		DEBUG_ERR("%s unknown reply data format\n", __func__);
1179 		rc = -EIO;
1180 		goto out;
1181 	}
1182 	if (rep_pl->data_len > *datasize) {
1183 		DEBUG_ERR("%s mismatch reply data len / data buffer len\n",
1184 			  __func__);
1185 		rc = -ENOSPC;
1186 		goto out;
1187 	}
1188 
1189 	/* copy the data from the cprb to the data buffer */
1190 	memcpy(databuf, rep_pl->data, rep_pl->data_len);
1191 	*datasize = rep_pl->data_len;
1192 
1193 out:
1194 	kfree(req);
1195 	kfree(rep);
1196 	kfree(urb);
1197 	return rc;
1198 }
1199 
ep11_clr2keyblob(u16 card,u16 domain,u32 keybitsize,u32 keygenflags,const u8 * clrkey,u8 * keybuf,size_t * keybufsize)1200 int ep11_clr2keyblob(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
1201 		     const u8 *clrkey, u8 *keybuf, size_t *keybufsize)
1202 {
1203 	int rc;
1204 	struct ep11keyblob *kb;
1205 	u8 encbuf[64], *kek = NULL;
1206 	size_t clrkeylen, keklen, encbuflen = sizeof(encbuf);
1207 
1208 	if (keybitsize == 128 || keybitsize == 192 || keybitsize == 256) {
1209 		clrkeylen = keybitsize / 8;
1210 	} else {
1211 		DEBUG_ERR(
1212 			"%s unknown/unsupported keybitsize %d\n",
1213 			__func__, keybitsize);
1214 		return -EINVAL;
1215 	}
1216 
1217 	/* allocate memory for the temp kek */
1218 	keklen = MAXEP11AESKEYBLOBSIZE;
1219 	kek = kmalloc(keklen, GFP_ATOMIC);
1220 	if (!kek) {
1221 		rc = -ENOMEM;
1222 		goto out;
1223 	}
1224 
1225 	/* Step 1: generate AES 256 bit random kek key */
1226 	rc = ep11_genaeskey(card, domain, 256,
1227 			    0x00006c00, /* EN/DECRYPT, WRAP/UNWRAP */
1228 			    kek, &keklen);
1229 	if (rc) {
1230 		DEBUG_ERR(
1231 			"%s generate kek key failed, rc=%d\n",
1232 			__func__, rc);
1233 		goto out;
1234 	}
1235 	kb = (struct ep11keyblob *)kek;
1236 	memset(&kb->head, 0, sizeof(kb->head));
1237 
1238 	/* Step 2: encrypt clear key value with the kek key */
1239 	rc = ep11_cryptsingle(card, domain, 0, 0, def_iv, kek, keklen,
1240 			      clrkey, clrkeylen, encbuf, &encbuflen);
1241 	if (rc) {
1242 		DEBUG_ERR(
1243 			"%s encrypting key value with kek key failed, rc=%d\n",
1244 			__func__, rc);
1245 		goto out;
1246 	}
1247 
1248 	/* Step 3: import the encrypted key value as a new key */
1249 	rc = ep11_unwrapkey(card, domain, kek, keklen,
1250 			    encbuf, encbuflen, 0, def_iv,
1251 			    keybitsize, 0, keybuf, keybufsize);
1252 	if (rc) {
1253 		DEBUG_ERR(
1254 			"%s importing key value as new key failed,, rc=%d\n",
1255 			__func__, rc);
1256 		goto out;
1257 	}
1258 
1259 out:
1260 	kfree(kek);
1261 	return rc;
1262 }
1263 EXPORT_SYMBOL(ep11_clr2keyblob);
1264 
ep11_kblob2protkey(u16 card,u16 dom,const u8 * keyblob,size_t keybloblen,u8 * protkey,u32 * protkeylen,u32 * protkeytype)1265 int ep11_kblob2protkey(u16 card, u16 dom, const u8 *keyblob, size_t keybloblen,
1266 		       u8 *protkey, u32 *protkeylen, u32 *protkeytype)
1267 {
1268 	int rc = -EIO;
1269 	u8 *wkbuf = NULL;
1270 	size_t wkbuflen, keylen;
1271 	struct wk_info {
1272 		u16 version;
1273 		u8  res1[16];
1274 		u32 pkeytype;
1275 		u32 pkeybitsize;
1276 		u64 pkeysize;
1277 		u8  res2[8];
1278 		u8  pkey[0];
1279 	} __packed * wki;
1280 	const u8 *key;
1281 	struct ep11kblob_header *hdr;
1282 
1283 	/* key with or without header ? */
1284 	hdr = (struct ep11kblob_header *)keyblob;
1285 	if (hdr->type == TOKTYPE_NON_CCA &&
1286 	    (hdr->version == TOKVER_EP11_AES_WITH_HEADER ||
1287 	     hdr->version == TOKVER_EP11_ECC_WITH_HEADER) &&
1288 	    is_ep11_keyblob(keyblob + sizeof(struct ep11kblob_header))) {
1289 		/* EP11 AES or ECC key with header */
1290 		key = keyblob + sizeof(struct ep11kblob_header);
1291 		keylen = hdr->len - sizeof(struct ep11kblob_header);
1292 	} else if (hdr->type == TOKTYPE_NON_CCA &&
1293 		   hdr->version == TOKVER_EP11_AES &&
1294 		   is_ep11_keyblob(keyblob)) {
1295 		/* EP11 AES key (old style) */
1296 		key = keyblob;
1297 		keylen = hdr->len;
1298 	} else if (is_ep11_keyblob(keyblob)) {
1299 		/* raw EP11 key blob */
1300 		key = keyblob;
1301 		keylen = keybloblen;
1302 	} else {
1303 		return -EINVAL;
1304 	}
1305 
1306 	/* alloc temp working buffer */
1307 	wkbuflen = (keylen + AES_BLOCK_SIZE) & (~(AES_BLOCK_SIZE - 1));
1308 	wkbuf = kmalloc(wkbuflen, GFP_ATOMIC);
1309 	if (!wkbuf)
1310 		return -ENOMEM;
1311 
1312 	/* ep11 secure key -> protected key + info */
1313 	rc = ep11_wrapkey(card, dom, key, keylen,
1314 			  0, def_iv, wkbuf, &wkbuflen);
1315 	if (rc) {
1316 		DEBUG_ERR(
1317 			"%s rewrapping ep11 key to pkey failed, rc=%d\n",
1318 			__func__, rc);
1319 		goto out;
1320 	}
1321 	wki = (struct wk_info *)wkbuf;
1322 
1323 	/* check struct version and pkey type */
1324 	if (wki->version != 1 || wki->pkeytype < 1 || wki->pkeytype > 5) {
1325 		DEBUG_ERR("%s wk info version %d or pkeytype %d mismatch.\n",
1326 			  __func__, (int)wki->version, (int)wki->pkeytype);
1327 		rc = -EIO;
1328 		goto out;
1329 	}
1330 
1331 	/* check protected key type field */
1332 	switch (wki->pkeytype) {
1333 	case 1: /* AES */
1334 		switch (wki->pkeysize) {
1335 		case 16 + 32:
1336 			/* AES 128 protected key */
1337 			if (protkeytype)
1338 				*protkeytype = PKEY_KEYTYPE_AES_128;
1339 			break;
1340 		case 24 + 32:
1341 			/* AES 192 protected key */
1342 			if (protkeytype)
1343 				*protkeytype = PKEY_KEYTYPE_AES_192;
1344 			break;
1345 		case 32 + 32:
1346 			/* AES 256 protected key */
1347 			if (protkeytype)
1348 				*protkeytype = PKEY_KEYTYPE_AES_256;
1349 			break;
1350 		default:
1351 			DEBUG_ERR("%s unknown/unsupported AES pkeysize %d\n",
1352 				  __func__, (int)wki->pkeysize);
1353 			rc = -EIO;
1354 			goto out;
1355 		}
1356 		break;
1357 	case 3: /* EC-P */
1358 	case 4: /* EC-ED */
1359 	case 5: /* EC-BP */
1360 		if (protkeytype)
1361 			*protkeytype = PKEY_KEYTYPE_ECC;
1362 		break;
1363 	case 2: /* TDES */
1364 	default:
1365 		DEBUG_ERR("%s unknown/unsupported key type %d\n",
1366 			  __func__, (int)wki->pkeytype);
1367 		rc = -EIO;
1368 		goto out;
1369 	}
1370 
1371 	/* copy the tanslated protected key */
1372 	if (wki->pkeysize > *protkeylen) {
1373 		DEBUG_ERR("%s wk info pkeysize %llu > protkeysize %u\n",
1374 			  __func__, wki->pkeysize, *protkeylen);
1375 		rc = -EINVAL;
1376 		goto out;
1377 	}
1378 	memcpy(protkey, wki->pkey, wki->pkeysize);
1379 	*protkeylen = wki->pkeysize;
1380 
1381 out:
1382 	kfree(wkbuf);
1383 	return rc;
1384 }
1385 EXPORT_SYMBOL(ep11_kblob2protkey);
1386 
ep11_findcard2(u32 ** apqns,u32 * nr_apqns,u16 cardnr,u16 domain,int minhwtype,int minapi,const u8 * wkvp)1387 int ep11_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
1388 		   int minhwtype, int minapi, const u8 *wkvp)
1389 {
1390 	struct zcrypt_device_status_ext *device_status;
1391 	u32 *_apqns = NULL, _nr_apqns = 0;
1392 	int i, card, dom, rc = -ENOMEM;
1393 	struct ep11_domain_info edi;
1394 	struct ep11_card_info eci;
1395 
1396 	/* fetch status of all crypto cards */
1397 	device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1398 				       sizeof(struct zcrypt_device_status_ext),
1399 				       GFP_KERNEL);
1400 	if (!device_status)
1401 		return -ENOMEM;
1402 	zcrypt_device_status_mask_ext(device_status);
1403 
1404 	/* allocate 1k space for up to 256 apqns */
1405 	_apqns = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
1406 	if (!_apqns) {
1407 		kvfree(device_status);
1408 		return -ENOMEM;
1409 	}
1410 
1411 	/* walk through all the crypto apqnss */
1412 	for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) {
1413 		card = AP_QID_CARD(device_status[i].qid);
1414 		dom = AP_QID_QUEUE(device_status[i].qid);
1415 		/* check online state */
1416 		if (!device_status[i].online)
1417 			continue;
1418 		/* check for ep11 functions */
1419 		if (!(device_status[i].functions & 0x01))
1420 			continue;
1421 		/* check cardnr */
1422 		if (cardnr != 0xFFFF && card != cardnr)
1423 			continue;
1424 		/* check domain */
1425 		if (domain != 0xFFFF && dom != domain)
1426 			continue;
1427 		/* check min hardware type */
1428 		if (minhwtype && device_status[i].hwtype < minhwtype)
1429 			continue;
1430 		/* check min api version if given */
1431 		if (minapi > 0) {
1432 			if (ep11_get_card_info(card, &eci, 0))
1433 				continue;
1434 			if (minapi > eci.API_ord_nr)
1435 				continue;
1436 		}
1437 		/* check wkvp if given */
1438 		if (wkvp) {
1439 			if (ep11_get_domain_info(card, dom, &edi))
1440 				continue;
1441 			if (edi.cur_wk_state != '1')
1442 				continue;
1443 			if (memcmp(wkvp, edi.cur_wkvp, 16))
1444 				continue;
1445 		}
1446 		/* apqn passed all filtering criterons, add to the array */
1447 		if (_nr_apqns < 256)
1448 			_apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom);
1449 	}
1450 
1451 	/* nothing found ? */
1452 	if (!_nr_apqns) {
1453 		kfree(_apqns);
1454 		rc = -ENODEV;
1455 	} else {
1456 		/* no re-allocation, simple return the _apqns array */
1457 		*apqns = _apqns;
1458 		*nr_apqns = _nr_apqns;
1459 		rc = 0;
1460 	}
1461 
1462 	kvfree(device_status);
1463 	return rc;
1464 }
1465 EXPORT_SYMBOL(ep11_findcard2);
1466 
zcrypt_ep11misc_exit(void)1467 void __exit zcrypt_ep11misc_exit(void)
1468 {
1469 	card_cache_free();
1470 }
1471