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1 /*
2  *  pkey device driver
3  *
4  *  Copyright IBM Corp. 2017
5  *  Author(s): Harald Freudenberger
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License (version 2 only)
9  * as published by the Free Software Foundation.
10  *
11  */
12 
13 #define KMSG_COMPONENT "pkey"
14 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
15 
16 #include <linux/fs.h>
17 #include <linux/init.h>
18 #include <linux/miscdevice.h>
19 #include <linux/module.h>
20 #include <linux/slab.h>
21 #include <linux/kallsyms.h>
22 #include <linux/debugfs.h>
23 #include <asm/zcrypt.h>
24 #include <asm/cpacf.h>
25 #include <asm/pkey.h>
26 
27 #include "zcrypt_api.h"
28 
29 MODULE_LICENSE("GPL");
30 MODULE_AUTHOR("IBM Corporation");
31 MODULE_DESCRIPTION("s390 protected key interface");
32 
33 /* Size of parameter block used for all cca requests/replies */
34 #define PARMBSIZE 512
35 
36 /* Size of vardata block used for some of the cca requests/replies */
37 #define VARDATASIZE 4096
38 
39 /*
40  * debug feature data and functions
41  */
42 
43 static debug_info_t *debug_info;
44 
45 #define DEBUG_DBG(...)	debug_sprintf_event(debug_info, 6, ##__VA_ARGS__)
46 #define DEBUG_INFO(...) debug_sprintf_event(debug_info, 5, ##__VA_ARGS__)
47 #define DEBUG_WARN(...) debug_sprintf_event(debug_info, 4, ##__VA_ARGS__)
48 #define DEBUG_ERR(...)	debug_sprintf_event(debug_info, 3, ##__VA_ARGS__)
49 
pkey_debug_init(void)50 static void __init pkey_debug_init(void)
51 {
52 	/* 5 arguments per dbf entry (including the format string ptr) */
53 	debug_info = debug_register("pkey", 1, 1, 5 * sizeof(long));
54 	debug_register_view(debug_info, &debug_sprintf_view);
55 	debug_set_level(debug_info, 3);
56 }
57 
pkey_debug_exit(void)58 static void __exit pkey_debug_exit(void)
59 {
60 	debug_unregister(debug_info);
61 }
62 
63 /* inside view of a secure key token (only type 0x01 version 0x04) */
64 struct secaeskeytoken {
65 	u8  type;     /* 0x01 for internal key token */
66 	u8  res0[3];
67 	u8  version;  /* should be 0x04 */
68 	u8  res1[1];
69 	u8  flag;     /* key flags */
70 	u8  res2[1];
71 	u64 mkvp;     /* master key verification pattern */
72 	u8  key[32];  /* key value (encrypted) */
73 	u8  cv[8];    /* control vector */
74 	u16 bitsize;  /* key bit size */
75 	u16 keysize;  /* key byte size */
76 	u8  tvv[4];   /* token validation value */
77 } __packed;
78 
79 /*
80  * Simple check if the token is a valid CCA secure AES key
81  * token. If keybitsize is given, the bitsize of the key is
82  * also checked. Returns 0 on success or errno value on failure.
83  */
check_secaeskeytoken(const u8 * token,int keybitsize)84 static int check_secaeskeytoken(const u8 *token, int keybitsize)
85 {
86 	struct secaeskeytoken *t = (struct secaeskeytoken *) token;
87 
88 	if (t->type != 0x01) {
89 		DEBUG_ERR(
90 			"check_secaeskeytoken secure token check failed, type mismatch 0x%02x != 0x01\n",
91 			(int) t->type);
92 		return -EINVAL;
93 	}
94 	if (t->version != 0x04) {
95 		DEBUG_ERR(
96 			"check_secaeskeytoken secure token check failed, version mismatch 0x%02x != 0x04\n",
97 			(int) t->version);
98 		return -EINVAL;
99 	}
100 	if (keybitsize > 0 && t->bitsize != keybitsize) {
101 		DEBUG_ERR(
102 			"check_secaeskeytoken secure token check failed, bitsize mismatch %d != %d\n",
103 			(int) t->bitsize, keybitsize);
104 		return -EINVAL;
105 	}
106 
107 	return 0;
108 }
109 
110 /*
111  * Allocate consecutive memory for request CPRB, request param
112  * block, reply CPRB and reply param block and fill in values
113  * for the common fields. Returns 0 on success or errno value
114  * on failure.
115  */
alloc_and_prep_cprbmem(size_t paramblen,u8 ** pcprbmem,struct CPRBX ** preqCPRB,struct CPRBX ** prepCPRB)116 static int alloc_and_prep_cprbmem(size_t paramblen,
117 				  u8 **pcprbmem,
118 				  struct CPRBX **preqCPRB,
119 				  struct CPRBX **prepCPRB)
120 {
121 	u8 *cprbmem;
122 	size_t cprbplusparamblen = sizeof(struct CPRBX) + paramblen;
123 	struct CPRBX *preqcblk, *prepcblk;
124 
125 	/*
126 	 * allocate consecutive memory for request CPRB, request param
127 	 * block, reply CPRB and reply param block
128 	 */
129 	cprbmem = kmalloc(2 * cprbplusparamblen, GFP_KERNEL);
130 	if (!cprbmem)
131 		return -ENOMEM;
132 	memset(cprbmem, 0, 2 * cprbplusparamblen);
133 
134 	preqcblk = (struct CPRBX *) cprbmem;
135 	prepcblk = (struct CPRBX *) (cprbmem + cprbplusparamblen);
136 
137 	/* fill request cprb struct */
138 	preqcblk->cprb_len = sizeof(struct CPRBX);
139 	preqcblk->cprb_ver_id = 0x02;
140 	memcpy(preqcblk->func_id, "T2", 2);
141 	preqcblk->rpl_msgbl = cprbplusparamblen;
142 	if (paramblen) {
143 		preqcblk->req_parmb =
144 			((u8 *) preqcblk) + sizeof(struct CPRBX);
145 		preqcblk->rpl_parmb =
146 			((u8 *) prepcblk) + sizeof(struct CPRBX);
147 	}
148 
149 	*pcprbmem = cprbmem;
150 	*preqCPRB = preqcblk;
151 	*prepCPRB = prepcblk;
152 
153 	return 0;
154 }
155 
156 /*
157  * Free the cprb memory allocated with the function above.
158  * If the scrub value is not zero, the memory is filled
159  * with zeros before freeing (useful if there was some
160  * clear key material in there).
161  */
free_cprbmem(void * mem,size_t paramblen,int scrub)162 static void free_cprbmem(void *mem, size_t paramblen, int scrub)
163 {
164 	if (scrub)
165 		memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen));
166 	kfree(mem);
167 }
168 
169 /*
170  * Helper function to prepare the xcrb struct
171  */
prep_xcrb(struct ica_xcRB * pxcrb,u16 cardnr,struct CPRBX * preqcblk,struct CPRBX * prepcblk)172 static inline void prep_xcrb(struct ica_xcRB *pxcrb,
173 			     u16 cardnr,
174 			     struct CPRBX *preqcblk,
175 			     struct CPRBX *prepcblk)
176 {
177 	memset(pxcrb, 0, sizeof(*pxcrb));
178 	pxcrb->agent_ID = 0x4341; /* 'CA' */
179 	pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr);
180 	pxcrb->request_control_blk_length =
181 		preqcblk->cprb_len + preqcblk->req_parml;
182 	pxcrb->request_control_blk_addr = (void __user *) preqcblk;
183 	pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl;
184 	pxcrb->reply_control_blk_addr = (void __user *) prepcblk;
185 }
186 
187 /*
188  * Helper function which calls zcrypt_send_cprb with
189  * memory management segment adjusted to kernel space
190  * so that the copy_from_user called within this
191  * function do in fact copy from kernel space.
192  */
_zcrypt_send_cprb(struct ica_xcRB * xcrb)193 static inline int _zcrypt_send_cprb(struct ica_xcRB *xcrb)
194 {
195 	int rc;
196 	mm_segment_t old_fs = get_fs();
197 
198 	set_fs(KERNEL_DS);
199 	rc = zcrypt_send_cprb(xcrb);
200 	set_fs(old_fs);
201 
202 	return rc;
203 }
204 
205 /*
206  * Generate (random) AES secure key.
207  */
pkey_genseckey(u16 cardnr,u16 domain,u32 keytype,struct pkey_seckey * seckey)208 int pkey_genseckey(u16 cardnr, u16 domain,
209 		   u32 keytype, struct pkey_seckey *seckey)
210 {
211 	int i, rc, keysize;
212 	int seckeysize;
213 	u8 *mem;
214 	struct CPRBX *preqcblk, *prepcblk;
215 	struct ica_xcRB xcrb;
216 	struct kgreqparm {
217 		u8  subfunc_code[2];
218 		u16 rule_array_len;
219 		struct lv1 {
220 			u16 len;
221 			char  key_form[8];
222 			char  key_length[8];
223 			char  key_type1[8];
224 			char  key_type2[8];
225 		} lv1;
226 		struct lv2 {
227 			u16 len;
228 			struct keyid {
229 				u16 len;
230 				u16 attr;
231 				u8  data[SECKEYBLOBSIZE];
232 			} keyid[6];
233 		} lv2;
234 	} *preqparm;
235 	struct kgrepparm {
236 		u8  subfunc_code[2];
237 		u16 rule_array_len;
238 		struct lv3 {
239 			u16 len;
240 			u16 keyblocklen;
241 			struct {
242 				u16 toklen;
243 				u16 tokattr;
244 				u8  tok[0];
245 				/* ... some more data ... */
246 			} keyblock;
247 		} lv3;
248 	} *prepparm;
249 
250 	/* get already prepared memory for 2 cprbs with param block each */
251 	rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
252 	if (rc)
253 		return rc;
254 
255 	/* fill request cprb struct */
256 	preqcblk->domain = domain;
257 
258 	/* fill request cprb param block with KG request */
259 	preqparm = (struct kgreqparm *) preqcblk->req_parmb;
260 	memcpy(preqparm->subfunc_code, "KG", 2);
261 	preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
262 	preqparm->lv1.len = sizeof(struct lv1);
263 	memcpy(preqparm->lv1.key_form,	 "OP      ", 8);
264 	switch (keytype) {
265 	case PKEY_KEYTYPE_AES_128:
266 		keysize = 16;
267 		memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8);
268 		break;
269 	case PKEY_KEYTYPE_AES_192:
270 		keysize = 24;
271 		memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8);
272 		break;
273 	case PKEY_KEYTYPE_AES_256:
274 		keysize = 32;
275 		memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8);
276 		break;
277 	default:
278 		DEBUG_ERR(
279 			"pkey_genseckey unknown/unsupported keytype %d\n",
280 			keytype);
281 		rc = -EINVAL;
282 		goto out;
283 	}
284 	memcpy(preqparm->lv1.key_type1,  "AESDATA ", 8);
285 	preqparm->lv2.len = sizeof(struct lv2);
286 	for (i = 0; i < 6; i++) {
287 		preqparm->lv2.keyid[i].len = sizeof(struct keyid);
288 		preqparm->lv2.keyid[i].attr = (i == 2 ? 0x30 : 0x10);
289 	}
290 	preqcblk->req_parml = sizeof(struct kgreqparm);
291 
292 	/* fill xcrb struct */
293 	prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
294 
295 	/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
296 	rc = _zcrypt_send_cprb(&xcrb);
297 	if (rc) {
298 		DEBUG_ERR(
299 			"pkey_genseckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
300 			(int) cardnr, (int) domain, rc);
301 		goto out;
302 	}
303 
304 	/* check response returncode and reasoncode */
305 	if (prepcblk->ccp_rtcode != 0) {
306 		DEBUG_ERR(
307 			"pkey_genseckey secure key generate failure, card response %d/%d\n",
308 			(int) prepcblk->ccp_rtcode,
309 			(int) prepcblk->ccp_rscode);
310 		rc = -EIO;
311 		goto out;
312 	}
313 
314 	/* process response cprb param block */
315 	prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
316 	prepparm = (struct kgrepparm *) prepcblk->rpl_parmb;
317 
318 	/* check length of the returned secure key token */
319 	seckeysize = prepparm->lv3.keyblock.toklen
320 		- sizeof(prepparm->lv3.keyblock.toklen)
321 		- sizeof(prepparm->lv3.keyblock.tokattr);
322 	if (seckeysize != SECKEYBLOBSIZE) {
323 		DEBUG_ERR(
324 			"pkey_genseckey secure token size mismatch %d != %d bytes\n",
325 			seckeysize, SECKEYBLOBSIZE);
326 		rc = -EIO;
327 		goto out;
328 	}
329 
330 	/* check secure key token */
331 	rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
332 	if (rc) {
333 		rc = -EIO;
334 		goto out;
335 	}
336 
337 	/* copy the generated secure key token */
338 	memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
339 
340 out:
341 	free_cprbmem(mem, PARMBSIZE, 0);
342 	return rc;
343 }
344 EXPORT_SYMBOL(pkey_genseckey);
345 
346 /*
347  * Generate an AES secure key with given key value.
348  */
pkey_clr2seckey(u16 cardnr,u16 domain,u32 keytype,const struct pkey_clrkey * clrkey,struct pkey_seckey * seckey)349 int pkey_clr2seckey(u16 cardnr, u16 domain, u32 keytype,
350 		    const struct pkey_clrkey *clrkey,
351 		    struct pkey_seckey *seckey)
352 {
353 	int rc, keysize, seckeysize;
354 	u8 *mem;
355 	struct CPRBX *preqcblk, *prepcblk;
356 	struct ica_xcRB xcrb;
357 	struct cmreqparm {
358 		u8  subfunc_code[2];
359 		u16 rule_array_len;
360 		char  rule_array[8];
361 		struct lv1 {
362 			u16 len;
363 			u8  clrkey[0];
364 		} lv1;
365 		struct lv2 {
366 			u16 len;
367 			struct keyid {
368 				u16 len;
369 				u16 attr;
370 				u8  data[SECKEYBLOBSIZE];
371 			} keyid;
372 		} lv2;
373 	} *preqparm;
374 	struct lv2 *plv2;
375 	struct cmrepparm {
376 		u8  subfunc_code[2];
377 		u16 rule_array_len;
378 		struct lv3 {
379 			u16 len;
380 			u16 keyblocklen;
381 			struct {
382 				u16 toklen;
383 				u16 tokattr;
384 				u8  tok[0];
385 				/* ... some more data ... */
386 			} keyblock;
387 		} lv3;
388 	} *prepparm;
389 
390 	/* get already prepared memory for 2 cprbs with param block each */
391 	rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
392 	if (rc)
393 		return rc;
394 
395 	/* fill request cprb struct */
396 	preqcblk->domain = domain;
397 
398 	/* fill request cprb param block with CM request */
399 	preqparm = (struct cmreqparm *) preqcblk->req_parmb;
400 	memcpy(preqparm->subfunc_code, "CM", 2);
401 	memcpy(preqparm->rule_array, "AES     ", 8);
402 	preqparm->rule_array_len =
403 		sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
404 	switch (keytype) {
405 	case PKEY_KEYTYPE_AES_128:
406 		keysize = 16;
407 		break;
408 	case PKEY_KEYTYPE_AES_192:
409 		keysize = 24;
410 		break;
411 	case PKEY_KEYTYPE_AES_256:
412 		keysize = 32;
413 		break;
414 	default:
415 		DEBUG_ERR(
416 			"pkey_clr2seckey unknown/unsupported keytype %d\n",
417 			keytype);
418 		rc = -EINVAL;
419 		goto out;
420 	}
421 	preqparm->lv1.len = sizeof(struct lv1) + keysize;
422 	memcpy(preqparm->lv1.clrkey, clrkey->clrkey, keysize);
423 	plv2 = (struct lv2 *) (((u8 *) &preqparm->lv2) + keysize);
424 	plv2->len = sizeof(struct lv2);
425 	plv2->keyid.len = sizeof(struct keyid);
426 	plv2->keyid.attr = 0x30;
427 	preqcblk->req_parml = sizeof(struct cmreqparm) + keysize;
428 
429 	/* fill xcrb struct */
430 	prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
431 
432 	/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
433 	rc = _zcrypt_send_cprb(&xcrb);
434 	if (rc) {
435 		DEBUG_ERR(
436 			"pkey_clr2seckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
437 			(int) cardnr, (int) domain, rc);
438 		goto out;
439 	}
440 
441 	/* check response returncode and reasoncode */
442 	if (prepcblk->ccp_rtcode != 0) {
443 		DEBUG_ERR(
444 			"pkey_clr2seckey clear key import failure, card response %d/%d\n",
445 			(int) prepcblk->ccp_rtcode,
446 			(int) prepcblk->ccp_rscode);
447 		rc = -EIO;
448 		goto out;
449 	}
450 
451 	/* process response cprb param block */
452 	prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
453 	prepparm = (struct cmrepparm *) prepcblk->rpl_parmb;
454 
455 	/* check length of the returned secure key token */
456 	seckeysize = prepparm->lv3.keyblock.toklen
457 		- sizeof(prepparm->lv3.keyblock.toklen)
458 		- sizeof(prepparm->lv3.keyblock.tokattr);
459 	if (seckeysize != SECKEYBLOBSIZE) {
460 		DEBUG_ERR(
461 			"pkey_clr2seckey secure token size mismatch %d != %d bytes\n",
462 			seckeysize, SECKEYBLOBSIZE);
463 		rc = -EIO;
464 		goto out;
465 	}
466 
467 	/* check secure key token */
468 	rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
469 	if (rc) {
470 		rc = -EIO;
471 		goto out;
472 	}
473 
474 	/* copy the generated secure key token */
475 	memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
476 
477 out:
478 	free_cprbmem(mem, PARMBSIZE, 1);
479 	return rc;
480 }
481 EXPORT_SYMBOL(pkey_clr2seckey);
482 
483 /*
484  * Derive a proteced key from the secure key blob.
485  */
pkey_sec2protkey(u16 cardnr,u16 domain,const struct pkey_seckey * seckey,struct pkey_protkey * protkey)486 int pkey_sec2protkey(u16 cardnr, u16 domain,
487 		     const struct pkey_seckey *seckey,
488 		     struct pkey_protkey *protkey)
489 {
490 	int rc;
491 	u8 *mem;
492 	struct CPRBX *preqcblk, *prepcblk;
493 	struct ica_xcRB xcrb;
494 	struct uskreqparm {
495 		u8  subfunc_code[2];
496 		u16 rule_array_len;
497 		struct lv1 {
498 			u16 len;
499 			u16 attr_len;
500 			u16 attr_flags;
501 		} lv1;
502 		struct lv2 {
503 			u16 len;
504 			u16 attr_len;
505 			u16 attr_flags;
506 			u8  token[0];	      /* cca secure key token */
507 		} lv2 __packed;
508 	} *preqparm;
509 	struct uskrepparm {
510 		u8  subfunc_code[2];
511 		u16 rule_array_len;
512 		struct lv3 {
513 			u16 len;
514 			u16 attr_len;
515 			u16 attr_flags;
516 			struct cpacfkeyblock {
517 				u8  version;  /* version of this struct */
518 				u8  flags[2];
519 				u8  algo;
520 				u8  form;
521 				u8  pad1[3];
522 				u16 keylen;
523 				u8  key[64];  /* the key (keylen bytes) */
524 				u16 keyattrlen;
525 				u8  keyattr[32];
526 				u8  pad2[1];
527 				u8  vptype;
528 				u8  vp[32];  /* verification pattern */
529 			} keyblock;
530 		} lv3 __packed;
531 	} *prepparm;
532 
533 	/* get already prepared memory for 2 cprbs with param block each */
534 	rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
535 	if (rc)
536 		return rc;
537 
538 	/* fill request cprb struct */
539 	preqcblk->domain = domain;
540 
541 	/* fill request cprb param block with USK request */
542 	preqparm = (struct uskreqparm *) preqcblk->req_parmb;
543 	memcpy(preqparm->subfunc_code, "US", 2);
544 	preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
545 	preqparm->lv1.len = sizeof(struct lv1);
546 	preqparm->lv1.attr_len = sizeof(struct lv1) - sizeof(preqparm->lv1.len);
547 	preqparm->lv1.attr_flags = 0x0001;
548 	preqparm->lv2.len = sizeof(struct lv2) + SECKEYBLOBSIZE;
549 	preqparm->lv2.attr_len = sizeof(struct lv2)
550 		- sizeof(preqparm->lv2.len) + SECKEYBLOBSIZE;
551 	preqparm->lv2.attr_flags = 0x0000;
552 	memcpy(preqparm->lv2.token, seckey->seckey, SECKEYBLOBSIZE);
553 	preqcblk->req_parml = sizeof(struct uskreqparm) + SECKEYBLOBSIZE;
554 
555 	/* fill xcrb struct */
556 	prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
557 
558 	/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
559 	rc = _zcrypt_send_cprb(&xcrb);
560 	if (rc) {
561 		DEBUG_ERR(
562 			"pkey_sec2protkey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
563 			(int) cardnr, (int) domain, rc);
564 		goto out;
565 	}
566 
567 	/* check response returncode and reasoncode */
568 	if (prepcblk->ccp_rtcode != 0) {
569 		DEBUG_ERR(
570 			"pkey_sec2protkey unwrap secure key failure, card response %d/%d\n",
571 			(int) prepcblk->ccp_rtcode,
572 			(int) prepcblk->ccp_rscode);
573 		rc = -EIO;
574 		goto out;
575 	}
576 	if (prepcblk->ccp_rscode != 0) {
577 		DEBUG_WARN(
578 			"pkey_sec2protkey unwrap secure key warning, card response %d/%d\n",
579 			(int) prepcblk->ccp_rtcode,
580 			(int) prepcblk->ccp_rscode);
581 	}
582 
583 	/* process response cprb param block */
584 	prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
585 	prepparm = (struct uskrepparm *) prepcblk->rpl_parmb;
586 
587 	/* check the returned keyblock */
588 	if (prepparm->lv3.keyblock.version != 0x01) {
589 		DEBUG_ERR(
590 			"pkey_sec2protkey reply param keyblock version mismatch 0x%02x != 0x01\n",
591 			(int) prepparm->lv3.keyblock.version);
592 		rc = -EIO;
593 		goto out;
594 	}
595 
596 	/* copy the tanslated protected key */
597 	switch (prepparm->lv3.keyblock.keylen) {
598 	case 16+32:
599 		protkey->type = PKEY_KEYTYPE_AES_128;
600 		break;
601 	case 24+32:
602 		protkey->type = PKEY_KEYTYPE_AES_192;
603 		break;
604 	case 32+32:
605 		protkey->type = PKEY_KEYTYPE_AES_256;
606 		break;
607 	default:
608 		DEBUG_ERR("pkey_sec2protkey unknown/unsupported keytype %d\n",
609 			  prepparm->lv3.keyblock.keylen);
610 		rc = -EIO;
611 		goto out;
612 	}
613 	protkey->len = prepparm->lv3.keyblock.keylen;
614 	memcpy(protkey->protkey, prepparm->lv3.keyblock.key, protkey->len);
615 
616 out:
617 	free_cprbmem(mem, PARMBSIZE, 0);
618 	return rc;
619 }
620 EXPORT_SYMBOL(pkey_sec2protkey);
621 
622 /*
623  * Create a protected key from a clear key value.
624  */
pkey_clr2protkey(u32 keytype,const struct pkey_clrkey * clrkey,struct pkey_protkey * protkey)625 int pkey_clr2protkey(u32 keytype,
626 		     const struct pkey_clrkey *clrkey,
627 		     struct pkey_protkey *protkey)
628 {
629 	long fc;
630 	int keysize;
631 	u8 paramblock[64];
632 
633 	switch (keytype) {
634 	case PKEY_KEYTYPE_AES_128:
635 		keysize = 16;
636 		fc = CPACF_PCKMO_ENC_AES_128_KEY;
637 		break;
638 	case PKEY_KEYTYPE_AES_192:
639 		keysize = 24;
640 		fc = CPACF_PCKMO_ENC_AES_192_KEY;
641 		break;
642 	case PKEY_KEYTYPE_AES_256:
643 		keysize = 32;
644 		fc = CPACF_PCKMO_ENC_AES_256_KEY;
645 		break;
646 	default:
647 		DEBUG_ERR("pkey_clr2protkey unknown/unsupported keytype %d\n",
648 			  keytype);
649 		return -EINVAL;
650 	}
651 
652 	/* prepare param block */
653 	memset(paramblock, 0, sizeof(paramblock));
654 	memcpy(paramblock, clrkey->clrkey, keysize);
655 
656 	/* call the pckmo instruction */
657 	cpacf_pckmo(fc, paramblock);
658 
659 	/* copy created protected key */
660 	protkey->type = keytype;
661 	protkey->len = keysize + 32;
662 	memcpy(protkey->protkey, paramblock, keysize + 32);
663 
664 	return 0;
665 }
666 EXPORT_SYMBOL(pkey_clr2protkey);
667 
668 /*
669  * query cryptographic facility from adapter
670  */
query_crypto_facility(u16 cardnr,u16 domain,const char * keyword,u8 * rarray,size_t * rarraylen,u8 * varray,size_t * varraylen)671 static int query_crypto_facility(u16 cardnr, u16 domain,
672 				 const char *keyword,
673 				 u8 *rarray, size_t *rarraylen,
674 				 u8 *varray, size_t *varraylen)
675 {
676 	int rc;
677 	u16 len;
678 	u8 *mem, *ptr;
679 	struct CPRBX *preqcblk, *prepcblk;
680 	struct ica_xcRB xcrb;
681 	struct fqreqparm {
682 		u8  subfunc_code[2];
683 		u16 rule_array_len;
684 		char  rule_array[8];
685 		struct lv1 {
686 			u16 len;
687 			u8  data[VARDATASIZE];
688 		} lv1;
689 		u16 dummylen;
690 	} *preqparm;
691 	size_t parmbsize = sizeof(struct fqreqparm);
692 	struct fqrepparm {
693 		u8  subfunc_code[2];
694 		u8  lvdata[0];
695 	} *prepparm;
696 
697 	/* get already prepared memory for 2 cprbs with param block each */
698 	rc = alloc_and_prep_cprbmem(parmbsize, &mem, &preqcblk, &prepcblk);
699 	if (rc)
700 		return rc;
701 
702 	/* fill request cprb struct */
703 	preqcblk->domain = domain;
704 
705 	/* fill request cprb param block with FQ request */
706 	preqparm = (struct fqreqparm *) preqcblk->req_parmb;
707 	memcpy(preqparm->subfunc_code, "FQ", 2);
708 	strncpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
709 	preqparm->rule_array_len =
710 		sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
711 	preqparm->lv1.len = sizeof(preqparm->lv1);
712 	preqparm->dummylen = sizeof(preqparm->dummylen);
713 	preqcblk->req_parml = parmbsize;
714 
715 	/* fill xcrb struct */
716 	prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
717 
718 	/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
719 	rc = _zcrypt_send_cprb(&xcrb);
720 	if (rc) {
721 		DEBUG_ERR(
722 			"query_crypto_facility zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
723 			(int) cardnr, (int) domain, rc);
724 		goto out;
725 	}
726 
727 	/* check response returncode and reasoncode */
728 	if (prepcblk->ccp_rtcode != 0) {
729 		DEBUG_ERR(
730 			"query_crypto_facility unwrap secure key failure, card response %d/%d\n",
731 			(int) prepcblk->ccp_rtcode,
732 			(int) prepcblk->ccp_rscode);
733 		rc = -EIO;
734 		goto out;
735 	}
736 
737 	/* process response cprb param block */
738 	prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
739 	prepparm = (struct fqrepparm *) prepcblk->rpl_parmb;
740 	ptr = prepparm->lvdata;
741 
742 	/* check and possibly copy reply rule array */
743 	len = *((u16 *) ptr);
744 	if (len > sizeof(u16)) {
745 		ptr += sizeof(u16);
746 		len -= sizeof(u16);
747 		if (rarray && rarraylen && *rarraylen > 0) {
748 			*rarraylen = (len > *rarraylen ? *rarraylen : len);
749 			memcpy(rarray, ptr, *rarraylen);
750 		}
751 		ptr += len;
752 	}
753 	/* check and possible copy reply var array */
754 	len = *((u16 *) ptr);
755 	if (len > sizeof(u16)) {
756 		ptr += sizeof(u16);
757 		len -= sizeof(u16);
758 		if (varray && varraylen && *varraylen > 0) {
759 			*varraylen = (len > *varraylen ? *varraylen : len);
760 			memcpy(varray, ptr, *varraylen);
761 		}
762 		ptr += len;
763 	}
764 
765 out:
766 	free_cprbmem(mem, parmbsize, 0);
767 	return rc;
768 }
769 
770 /*
771  * Fetch the current and old mkvp values via
772  * query_crypto_facility from adapter.
773  */
fetch_mkvp(u16 cardnr,u16 domain,u64 mkvp[2])774 static int fetch_mkvp(u16 cardnr, u16 domain, u64 mkvp[2])
775 {
776 	int rc, found = 0;
777 	size_t rlen, vlen;
778 	u8 *rarray, *varray, *pg;
779 
780 	pg = (u8 *) __get_free_page(GFP_KERNEL);
781 	if (!pg)
782 		return -ENOMEM;
783 	rarray = pg;
784 	varray = pg + PAGE_SIZE/2;
785 	rlen = vlen = PAGE_SIZE/2;
786 
787 	rc = query_crypto_facility(cardnr, domain, "STATICSA",
788 				   rarray, &rlen, varray, &vlen);
789 	if (rc == 0 && rlen > 8*8 && vlen > 184+8) {
790 		if (rarray[8*8] == '2') {
791 			/* current master key state is valid */
792 			mkvp[0] = *((u64 *)(varray + 184));
793 			mkvp[1] = *((u64 *)(varray + 172));
794 			found = 1;
795 		}
796 	}
797 
798 	free_page((unsigned long) pg);
799 
800 	return found ? 0 : -ENOENT;
801 }
802 
803 /* struct to hold cached mkvp info for each card/domain */
804 struct mkvp_info {
805 	struct list_head list;
806 	u16 cardnr;
807 	u16 domain;
808 	u64 mkvp[2];
809 };
810 
811 /* a list with mkvp_info entries */
812 static LIST_HEAD(mkvp_list);
813 static DEFINE_SPINLOCK(mkvp_list_lock);
814 
mkvp_cache_fetch(u16 cardnr,u16 domain,u64 mkvp[2])815 static int mkvp_cache_fetch(u16 cardnr, u16 domain, u64 mkvp[2])
816 {
817 	int rc = -ENOENT;
818 	struct mkvp_info *ptr;
819 
820 	spin_lock_bh(&mkvp_list_lock);
821 	list_for_each_entry(ptr, &mkvp_list, list) {
822 		if (ptr->cardnr == cardnr &&
823 		    ptr->domain == domain) {
824 			memcpy(mkvp, ptr->mkvp, 2 * sizeof(u64));
825 			rc = 0;
826 			break;
827 		}
828 	}
829 	spin_unlock_bh(&mkvp_list_lock);
830 
831 	return rc;
832 }
833 
mkvp_cache_update(u16 cardnr,u16 domain,u64 mkvp[2])834 static void mkvp_cache_update(u16 cardnr, u16 domain, u64 mkvp[2])
835 {
836 	int found = 0;
837 	struct mkvp_info *ptr;
838 
839 	spin_lock_bh(&mkvp_list_lock);
840 	list_for_each_entry(ptr, &mkvp_list, list) {
841 		if (ptr->cardnr == cardnr &&
842 		    ptr->domain == domain) {
843 			memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64));
844 			found = 1;
845 			break;
846 		}
847 	}
848 	if (!found) {
849 		ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
850 		if (!ptr) {
851 			spin_unlock_bh(&mkvp_list_lock);
852 			return;
853 		}
854 		ptr->cardnr = cardnr;
855 		ptr->domain = domain;
856 		memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64));
857 		list_add(&ptr->list, &mkvp_list);
858 	}
859 	spin_unlock_bh(&mkvp_list_lock);
860 }
861 
mkvp_cache_scrub(u16 cardnr,u16 domain)862 static void mkvp_cache_scrub(u16 cardnr, u16 domain)
863 {
864 	struct mkvp_info *ptr;
865 
866 	spin_lock_bh(&mkvp_list_lock);
867 	list_for_each_entry(ptr, &mkvp_list, list) {
868 		if (ptr->cardnr == cardnr &&
869 		    ptr->domain == domain) {
870 			list_del(&ptr->list);
871 			kfree(ptr);
872 			break;
873 		}
874 	}
875 	spin_unlock_bh(&mkvp_list_lock);
876 }
877 
mkvp_cache_free(void)878 static void __exit mkvp_cache_free(void)
879 {
880 	struct mkvp_info *ptr, *pnext;
881 
882 	spin_lock_bh(&mkvp_list_lock);
883 	list_for_each_entry_safe(ptr, pnext, &mkvp_list, list) {
884 		list_del(&ptr->list);
885 		kfree(ptr);
886 	}
887 	spin_unlock_bh(&mkvp_list_lock);
888 }
889 
890 /*
891  * Search for a matching crypto card based on the Master Key
892  * Verification Pattern provided inside a secure key.
893  */
pkey_findcard(const struct pkey_seckey * seckey,u16 * pcardnr,u16 * pdomain,int verify)894 int pkey_findcard(const struct pkey_seckey *seckey,
895 		  u16 *pcardnr, u16 *pdomain, int verify)
896 {
897 	struct secaeskeytoken *t = (struct secaeskeytoken *) seckey;
898 	struct zcrypt_device_matrix *device_matrix;
899 	u16 card, dom;
900 	u64 mkvp[2];
901 	int i, rc, oi = -1;
902 
903 	/* mkvp must not be zero */
904 	if (t->mkvp == 0)
905 		return -EINVAL;
906 
907 	/* fetch status of all crypto cards */
908 	device_matrix = kmalloc(sizeof(struct zcrypt_device_matrix),
909 				GFP_KERNEL);
910 	if (!device_matrix)
911 		return -ENOMEM;
912 	zcrypt_device_status_mask(device_matrix);
913 
914 	/* walk through all crypto cards */
915 	for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
916 		card = AP_QID_CARD(device_matrix->device[i].qid);
917 		dom = AP_QID_QUEUE(device_matrix->device[i].qid);
918 		if (device_matrix->device[i].online &&
919 		    device_matrix->device[i].functions & 0x04) {
920 			/* an enabled CCA Coprocessor card */
921 			/* try cached mkvp */
922 			if (mkvp_cache_fetch(card, dom, mkvp) == 0 &&
923 			    t->mkvp == mkvp[0]) {
924 				if (!verify)
925 					break;
926 				/* verify: fetch mkvp from adapter */
927 				if (fetch_mkvp(card, dom, mkvp) == 0) {
928 					mkvp_cache_update(card, dom, mkvp);
929 					if (t->mkvp == mkvp[0])
930 						break;
931 				}
932 			}
933 		} else {
934 			/* Card is offline and/or not a CCA card. */
935 			/* del mkvp entry from cache if it exists */
936 			mkvp_cache_scrub(card, dom);
937 		}
938 	}
939 	if (i >= MAX_ZDEV_ENTRIES) {
940 		/* nothing found, so this time without cache */
941 		for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
942 			if (!(device_matrix->device[i].online &&
943 			      device_matrix->device[i].functions & 0x04))
944 				continue;
945 			card = AP_QID_CARD(device_matrix->device[i].qid);
946 			dom = AP_QID_QUEUE(device_matrix->device[i].qid);
947 			/* fresh fetch mkvp from adapter */
948 			if (fetch_mkvp(card, dom, mkvp) == 0) {
949 				mkvp_cache_update(card, dom, mkvp);
950 				if (t->mkvp == mkvp[0])
951 					break;
952 				if (t->mkvp == mkvp[1] && oi < 0)
953 					oi = i;
954 			}
955 		}
956 		if (i >= MAX_ZDEV_ENTRIES && oi >= 0) {
957 			/* old mkvp matched, use this card then */
958 			card = AP_QID_CARD(device_matrix->device[oi].qid);
959 			dom = AP_QID_QUEUE(device_matrix->device[oi].qid);
960 		}
961 	}
962 	if (i < MAX_ZDEV_ENTRIES || oi >= 0) {
963 		if (pcardnr)
964 			*pcardnr = card;
965 		if (pdomain)
966 			*pdomain = dom;
967 		rc = 0;
968 	} else
969 		rc = -ENODEV;
970 
971 	kfree(device_matrix);
972 	return rc;
973 }
974 EXPORT_SYMBOL(pkey_findcard);
975 
976 /*
977  * Find card and transform secure key into protected key.
978  */
pkey_skey2pkey(const struct pkey_seckey * seckey,struct pkey_protkey * protkey)979 int pkey_skey2pkey(const struct pkey_seckey *seckey,
980 		   struct pkey_protkey *protkey)
981 {
982 	u16 cardnr, domain;
983 	int rc, verify;
984 
985 	/*
986 	 * The pkey_sec2protkey call may fail when a card has been
987 	 * addressed where the master key was changed after last fetch
988 	 * of the mkvp into the cache. So first try without verify then
989 	 * with verify enabled (thus refreshing the mkvp for each card).
990 	 */
991 	for (verify = 0; verify < 2; verify++) {
992 		rc = pkey_findcard(seckey, &cardnr, &domain, verify);
993 		if (rc)
994 			continue;
995 		rc = pkey_sec2protkey(cardnr, domain, seckey, protkey);
996 		if (rc == 0)
997 			break;
998 	}
999 
1000 	if (rc)
1001 		DEBUG_DBG("pkey_skey2pkey failed rc=%d\n", rc);
1002 
1003 	return rc;
1004 }
1005 EXPORT_SYMBOL(pkey_skey2pkey);
1006 
1007 /*
1008  * Verify key and give back some info about the key.
1009  */
pkey_verifykey(const struct pkey_seckey * seckey,u16 * pcardnr,u16 * pdomain,u16 * pkeysize,u32 * pattributes)1010 int pkey_verifykey(const struct pkey_seckey *seckey,
1011 		   u16 *pcardnr, u16 *pdomain,
1012 		   u16 *pkeysize, u32 *pattributes)
1013 {
1014 	struct secaeskeytoken *t = (struct secaeskeytoken *) seckey;
1015 	u16 cardnr, domain;
1016 	u64 mkvp[2];
1017 	int rc;
1018 
1019 	/* check the secure key for valid AES secure key */
1020 	rc = check_secaeskeytoken((u8 *) seckey, 0);
1021 	if (rc)
1022 		goto out;
1023 	if (pattributes)
1024 		*pattributes = PKEY_VERIFY_ATTR_AES;
1025 	if (pkeysize)
1026 		*pkeysize = t->bitsize;
1027 
1028 	/* try to find a card which can handle this key */
1029 	rc = pkey_findcard(seckey, &cardnr, &domain, 1);
1030 	if (rc)
1031 		goto out;
1032 
1033 	/* check mkvp for old mkvp match */
1034 	rc = mkvp_cache_fetch(cardnr, domain, mkvp);
1035 	if (rc)
1036 		goto out;
1037 	if (t->mkvp == mkvp[1]) {
1038 		DEBUG_DBG("pkey_verifykey secure key has old mkvp\n");
1039 		if (pattributes)
1040 			*pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP;
1041 	}
1042 
1043 	if (pcardnr)
1044 		*pcardnr = cardnr;
1045 	if (pdomain)
1046 		*pdomain = domain;
1047 
1048 out:
1049 	DEBUG_DBG("pkey_verifykey rc=%d\n", rc);
1050 	return rc;
1051 }
1052 EXPORT_SYMBOL(pkey_verifykey);
1053 
1054 /*
1055  * File io functions
1056  */
1057 
pkey_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1058 static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
1059 				unsigned long arg)
1060 {
1061 	int rc;
1062 
1063 	switch (cmd) {
1064 	case PKEY_GENSECK: {
1065 		struct pkey_genseck __user *ugs = (void __user *) arg;
1066 		struct pkey_genseck kgs;
1067 
1068 		if (copy_from_user(&kgs, ugs, sizeof(kgs)))
1069 			return -EFAULT;
1070 		rc = pkey_genseckey(kgs.cardnr, kgs.domain,
1071 				    kgs.keytype, &kgs.seckey);
1072 		DEBUG_DBG("pkey_ioctl pkey_genseckey()=%d\n", rc);
1073 		if (rc)
1074 			break;
1075 		if (copy_to_user(ugs, &kgs, sizeof(kgs)))
1076 			return -EFAULT;
1077 		break;
1078 	}
1079 	case PKEY_CLR2SECK: {
1080 		struct pkey_clr2seck __user *ucs = (void __user *) arg;
1081 		struct pkey_clr2seck kcs;
1082 
1083 		if (copy_from_user(&kcs, ucs, sizeof(kcs)))
1084 			return -EFAULT;
1085 		rc = pkey_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype,
1086 				     &kcs.clrkey, &kcs.seckey);
1087 		DEBUG_DBG("pkey_ioctl pkey_clr2seckey()=%d\n", rc);
1088 		if (rc)
1089 			break;
1090 		if (copy_to_user(ucs, &kcs, sizeof(kcs)))
1091 			return -EFAULT;
1092 		memzero_explicit(&kcs, sizeof(kcs));
1093 		break;
1094 	}
1095 	case PKEY_SEC2PROTK: {
1096 		struct pkey_sec2protk __user *usp = (void __user *) arg;
1097 		struct pkey_sec2protk ksp;
1098 
1099 		if (copy_from_user(&ksp, usp, sizeof(ksp)))
1100 			return -EFAULT;
1101 		rc = pkey_sec2protkey(ksp.cardnr, ksp.domain,
1102 				      &ksp.seckey, &ksp.protkey);
1103 		DEBUG_DBG("pkey_ioctl pkey_sec2protkey()=%d\n", rc);
1104 		if (rc)
1105 			break;
1106 		if (copy_to_user(usp, &ksp, sizeof(ksp)))
1107 			return -EFAULT;
1108 		break;
1109 	}
1110 	case PKEY_CLR2PROTK: {
1111 		struct pkey_clr2protk __user *ucp = (void __user *) arg;
1112 		struct pkey_clr2protk kcp;
1113 
1114 		if (copy_from_user(&kcp, ucp, sizeof(kcp)))
1115 			return -EFAULT;
1116 		rc = pkey_clr2protkey(kcp.keytype,
1117 				      &kcp.clrkey, &kcp.protkey);
1118 		DEBUG_DBG("pkey_ioctl pkey_clr2protkey()=%d\n", rc);
1119 		if (rc)
1120 			break;
1121 		if (copy_to_user(ucp, &kcp, sizeof(kcp)))
1122 			return -EFAULT;
1123 		memzero_explicit(&kcp, sizeof(kcp));
1124 		break;
1125 	}
1126 	case PKEY_FINDCARD: {
1127 		struct pkey_findcard __user *ufc = (void __user *) arg;
1128 		struct pkey_findcard kfc;
1129 
1130 		if (copy_from_user(&kfc, ufc, sizeof(kfc)))
1131 			return -EFAULT;
1132 		rc = pkey_findcard(&kfc.seckey,
1133 				   &kfc.cardnr, &kfc.domain, 1);
1134 		DEBUG_DBG("pkey_ioctl pkey_findcard()=%d\n", rc);
1135 		if (rc)
1136 			break;
1137 		if (copy_to_user(ufc, &kfc, sizeof(kfc)))
1138 			return -EFAULT;
1139 		break;
1140 	}
1141 	case PKEY_SKEY2PKEY: {
1142 		struct pkey_skey2pkey __user *usp = (void __user *) arg;
1143 		struct pkey_skey2pkey ksp;
1144 
1145 		if (copy_from_user(&ksp, usp, sizeof(ksp)))
1146 			return -EFAULT;
1147 		rc = pkey_skey2pkey(&ksp.seckey, &ksp.protkey);
1148 		DEBUG_DBG("pkey_ioctl pkey_skey2pkey()=%d\n", rc);
1149 		if (rc)
1150 			break;
1151 		if (copy_to_user(usp, &ksp, sizeof(ksp)))
1152 			return -EFAULT;
1153 		break;
1154 	}
1155 	case PKEY_VERIFYKEY: {
1156 		struct pkey_verifykey __user *uvk = (void __user *) arg;
1157 		struct pkey_verifykey kvk;
1158 
1159 		if (copy_from_user(&kvk, uvk, sizeof(kvk)))
1160 			return -EFAULT;
1161 		rc = pkey_verifykey(&kvk.seckey, &kvk.cardnr, &kvk.domain,
1162 				    &kvk.keysize, &kvk.attributes);
1163 		DEBUG_DBG("pkey_ioctl pkey_verifykey()=%d\n", rc);
1164 		if (rc)
1165 			break;
1166 		if (copy_to_user(uvk, &kvk, sizeof(kvk)))
1167 			return -EFAULT;
1168 		break;
1169 	}
1170 	default:
1171 		/* unknown/unsupported ioctl cmd */
1172 		return -ENOTTY;
1173 	}
1174 
1175 	return rc;
1176 }
1177 
1178 /*
1179  * Sysfs and file io operations
1180  */
1181 static const struct file_operations pkey_fops = {
1182 	.owner		= THIS_MODULE,
1183 	.open		= nonseekable_open,
1184 	.llseek		= no_llseek,
1185 	.unlocked_ioctl = pkey_unlocked_ioctl,
1186 };
1187 
1188 static struct miscdevice pkey_dev = {
1189 	.name	= "pkey",
1190 	.minor	= MISC_DYNAMIC_MINOR,
1191 	.mode	= 0666,
1192 	.fops	= &pkey_fops,
1193 };
1194 
1195 /*
1196  * Module init
1197  */
pkey_init(void)1198 static int __init pkey_init(void)
1199 {
1200 	cpacf_mask_t pckmo_functions;
1201 
1202 	/* check for pckmo instructions available */
1203 	if (!cpacf_query(CPACF_PCKMO, &pckmo_functions))
1204 		return -EOPNOTSUPP;
1205 	if (!cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_128_KEY) ||
1206 	    !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_192_KEY) ||
1207 	    !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_256_KEY))
1208 		return -EOPNOTSUPP;
1209 
1210 	pkey_debug_init();
1211 
1212 	return misc_register(&pkey_dev);
1213 }
1214 
1215 /*
1216  * Module exit
1217  */
pkey_exit(void)1218 static void __exit pkey_exit(void)
1219 {
1220 	misc_deregister(&pkey_dev);
1221 	mkvp_cache_free();
1222 	pkey_debug_exit();
1223 }
1224 
1225 module_init(pkey_init);
1226 module_exit(pkey_exit);
1227