4 * Copyright IBM Corp. 2017
5 * Author(s): Harald Freudenberger
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.
13 #define KMSG_COMPONENT "pkey"
14 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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>
27 #include "zcrypt_api.h"
29 MODULE_LICENSE("GPL");
30 MODULE_AUTHOR("IBM Corporation");
31 MODULE_DESCRIPTION("s390 protected key interface");
33 /* Size of parameter block used for all cca requests/replies */
36 /* Size of vardata block used for some of the cca requests/replies */
37 #define VARDATASIZE 4096
40 * debug feature data and functions
43 static debug_info_t *debug_info;
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__)
50 static void __init pkey_debug_init(void)
52 debug_info = debug_register("pkey", 1, 1, 4 * sizeof(long));
53 debug_register_view(debug_info, &debug_sprintf_view);
54 debug_set_level(debug_info, 3);
57 static void __exit pkey_debug_exit(void)
59 debug_unregister(debug_info);
62 /* inside view of a secure key token (only type 0x01 version 0x04) */
63 struct secaeskeytoken {
64 u8 type; /* 0x01 for internal key token */
66 u8 version; /* should be 0x04 */
68 u8 flag; /* key flags */
70 u64 mkvp; /* master key verification pattern */
71 u8 key[32]; /* key value (encrypted) */
72 u8 cv[8]; /* control vector */
73 u16 bitsize; /* key bit size */
74 u16 keysize; /* key byte size */
75 u8 tvv[4]; /* token validation value */
79 * Simple check if the token is a valid CCA secure AES key
80 * token. If keybitsize is given, the bitsize of the key is
81 * also checked. Returns 0 on success or errno value on failure.
83 static int check_secaeskeytoken(const u8 *token, int keybitsize)
85 struct secaeskeytoken *t = (struct secaeskeytoken *) token;
87 if (t->type != 0x01) {
89 "check_secaeskeytoken secure token check failed, type mismatch 0x%02x != 0x01\n",
93 if (t->version != 0x04) {
95 "check_secaeskeytoken secure token check failed, version mismatch 0x%02x != 0x04\n",
99 if (keybitsize > 0 && t->bitsize != keybitsize) {
101 "check_secaeskeytoken secure token check failed, bitsize mismatch %d != %d\n",
102 (int) t->bitsize, keybitsize);
110 * Allocate consecutive memory for request CPRB, request param
111 * block, reply CPRB and reply param block and fill in values
112 * for the common fields. Returns 0 on success or errno value
115 static int alloc_and_prep_cprbmem(size_t paramblen,
117 struct CPRBX **preqCPRB,
118 struct CPRBX **prepCPRB)
121 size_t cprbplusparamblen = sizeof(struct CPRBX) + paramblen;
122 struct CPRBX *preqcblk, *prepcblk;
125 * allocate consecutive memory for request CPRB, request param
126 * block, reply CPRB and reply param block
128 cprbmem = kzalloc(2 * cprbplusparamblen, GFP_KERNEL);
132 preqcblk = (struct CPRBX *) cprbmem;
133 prepcblk = (struct CPRBX *) (cprbmem + cprbplusparamblen);
135 /* fill request cprb struct */
136 preqcblk->cprb_len = sizeof(struct CPRBX);
137 preqcblk->cprb_ver_id = 0x02;
138 memcpy(preqcblk->func_id, "T2", 2);
139 preqcblk->rpl_msgbl = cprbplusparamblen;
141 preqcblk->req_parmb =
142 ((u8 *) preqcblk) + sizeof(struct CPRBX);
143 preqcblk->rpl_parmb =
144 ((u8 *) prepcblk) + sizeof(struct CPRBX);
148 *preqCPRB = preqcblk;
149 *prepCPRB = prepcblk;
155 * Free the cprb memory allocated with the function above.
156 * If the scrub value is not zero, the memory is filled
157 * with zeros before freeing (useful if there was some
158 * clear key material in there).
160 static void free_cprbmem(void *mem, size_t paramblen, int scrub)
163 memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen));
168 * Helper function to prepare the xcrb struct
170 static inline void prep_xcrb(struct ica_xcRB *pxcrb,
172 struct CPRBX *preqcblk,
173 struct CPRBX *prepcblk)
175 memset(pxcrb, 0, sizeof(*pxcrb));
176 pxcrb->agent_ID = 0x4341; /* 'CA' */
177 pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr);
178 pxcrb->request_control_blk_length =
179 preqcblk->cprb_len + preqcblk->req_parml;
180 pxcrb->request_control_blk_addr = (void __user *) preqcblk;
181 pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl;
182 pxcrb->reply_control_blk_addr = (void __user *) prepcblk;
186 * Helper function which calls zcrypt_send_cprb with
187 * memory management segment adjusted to kernel space
188 * so that the copy_from_user called within this
189 * function do in fact copy from kernel space.
191 static inline int _zcrypt_send_cprb(struct ica_xcRB *xcrb)
194 mm_segment_t old_fs = get_fs();
197 rc = zcrypt_send_cprb(xcrb);
204 * Generate (random) AES secure key.
206 int pkey_genseckey(u16 cardnr, u16 domain,
207 u32 keytype, struct pkey_seckey *seckey)
212 struct CPRBX *preqcblk, *prepcblk;
213 struct ica_xcRB xcrb;
229 u8 data[SECKEYBLOBSIZE];
243 /* ... some more data ... */
248 /* get already prepared memory for 2 cprbs with param block each */
249 rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
253 /* fill request cprb struct */
254 preqcblk->domain = domain;
256 /* fill request cprb param block with KG request */
257 preqparm = (struct kgreqparm *) preqcblk->req_parmb;
258 memcpy(preqparm->subfunc_code, "KG", 2);
259 preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
260 preqparm->lv1.len = sizeof(struct lv1);
261 memcpy(preqparm->lv1.key_form, "OP ", 8);
263 case PKEY_KEYTYPE_AES_128:
265 memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8);
267 case PKEY_KEYTYPE_AES_192:
269 memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8);
271 case PKEY_KEYTYPE_AES_256:
273 memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8);
277 "pkey_genseckey unknown/unsupported keytype %d\n",
282 memcpy(preqparm->lv1.key_type1, "AESDATA ", 8);
283 preqparm->lv2.len = sizeof(struct lv2);
284 for (i = 0; i < 6; i++) {
285 preqparm->lv2.keyid[i].len = sizeof(struct keyid);
286 preqparm->lv2.keyid[i].attr = (i == 2 ? 0x30 : 0x10);
288 preqcblk->req_parml = sizeof(struct kgreqparm);
290 /* fill xcrb struct */
291 prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
293 /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
294 rc = _zcrypt_send_cprb(&xcrb);
297 "pkey_genseckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
298 (int) cardnr, (int) domain, rc);
302 /* check response returncode and reasoncode */
303 if (prepcblk->ccp_rtcode != 0) {
305 "pkey_genseckey secure key generate failure, card response %d/%d\n",
306 (int) prepcblk->ccp_rtcode,
307 (int) prepcblk->ccp_rscode);
312 /* process response cprb param block */
313 prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
314 prepparm = (struct kgrepparm *) prepcblk->rpl_parmb;
316 /* check length of the returned secure key token */
317 seckeysize = prepparm->lv3.keyblock.toklen
318 - sizeof(prepparm->lv3.keyblock.toklen)
319 - sizeof(prepparm->lv3.keyblock.tokattr);
320 if (seckeysize != SECKEYBLOBSIZE) {
322 "pkey_genseckey secure token size mismatch %d != %d bytes\n",
323 seckeysize, SECKEYBLOBSIZE);
328 /* check secure key token */
329 rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
335 /* copy the generated secure key token */
336 memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
339 free_cprbmem(mem, PARMBSIZE, 0);
342 EXPORT_SYMBOL(pkey_genseckey);
345 * Generate an AES secure key with given key value.
347 int pkey_clr2seckey(u16 cardnr, u16 domain, u32 keytype,
348 const struct pkey_clrkey *clrkey,
349 struct pkey_seckey *seckey)
351 int rc, keysize, seckeysize;
353 struct CPRBX *preqcblk, *prepcblk;
354 struct ica_xcRB xcrb;
368 u8 data[SECKEYBLOBSIZE];
383 /* ... some more data ... */
388 /* get already prepared memory for 2 cprbs with param block each */
389 rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
393 /* fill request cprb struct */
394 preqcblk->domain = domain;
396 /* fill request cprb param block with CM request */
397 preqparm = (struct cmreqparm *) preqcblk->req_parmb;
398 memcpy(preqparm->subfunc_code, "CM", 2);
399 memcpy(preqparm->rule_array, "AES ", 8);
400 preqparm->rule_array_len =
401 sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
403 case PKEY_KEYTYPE_AES_128:
406 case PKEY_KEYTYPE_AES_192:
409 case PKEY_KEYTYPE_AES_256:
414 "pkey_clr2seckey unknown/unsupported keytype %d\n",
419 preqparm->lv1.len = sizeof(struct lv1) + keysize;
420 memcpy(preqparm->lv1.clrkey, clrkey->clrkey, keysize);
421 plv2 = (struct lv2 *) (((u8 *) &preqparm->lv2) + keysize);
422 plv2->len = sizeof(struct lv2);
423 plv2->keyid.len = sizeof(struct keyid);
424 plv2->keyid.attr = 0x30;
425 preqcblk->req_parml = sizeof(struct cmreqparm) + keysize;
427 /* fill xcrb struct */
428 prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
430 /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
431 rc = _zcrypt_send_cprb(&xcrb);
434 "pkey_clr2seckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
435 (int) cardnr, (int) domain, rc);
439 /* check response returncode and reasoncode */
440 if (prepcblk->ccp_rtcode != 0) {
442 "pkey_clr2seckey clear key import failure, card response %d/%d\n",
443 (int) prepcblk->ccp_rtcode,
444 (int) prepcblk->ccp_rscode);
449 /* process response cprb param block */
450 prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
451 prepparm = (struct cmrepparm *) prepcblk->rpl_parmb;
453 /* check length of the returned secure key token */
454 seckeysize = prepparm->lv3.keyblock.toklen
455 - sizeof(prepparm->lv3.keyblock.toklen)
456 - sizeof(prepparm->lv3.keyblock.tokattr);
457 if (seckeysize != SECKEYBLOBSIZE) {
459 "pkey_clr2seckey secure token size mismatch %d != %d bytes\n",
460 seckeysize, SECKEYBLOBSIZE);
465 /* check secure key token */
466 rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
472 /* copy the generated secure key token */
473 memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
476 free_cprbmem(mem, PARMBSIZE, 1);
479 EXPORT_SYMBOL(pkey_clr2seckey);
482 * Derive a proteced key from the secure key blob.
484 int pkey_sec2protkey(u16 cardnr, u16 domain,
485 const struct pkey_seckey *seckey,
486 struct pkey_protkey *protkey)
490 struct CPRBX *preqcblk, *prepcblk;
491 struct ica_xcRB xcrb;
504 u8 token[0]; /* cca secure key token */
514 struct cpacfkeyblock {
515 u8 version; /* version of this struct */
521 u8 key[64]; /* the key (keylen bytes) */
526 u8 vp[32]; /* verification pattern */
531 /* get already prepared memory for 2 cprbs with param block each */
532 rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
536 /* fill request cprb struct */
537 preqcblk->domain = domain;
539 /* fill request cprb param block with USK request */
540 preqparm = (struct uskreqparm *) preqcblk->req_parmb;
541 memcpy(preqparm->subfunc_code, "US", 2);
542 preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
543 preqparm->lv1.len = sizeof(struct lv1);
544 preqparm->lv1.attr_len = sizeof(struct lv1) - sizeof(preqparm->lv1.len);
545 preqparm->lv1.attr_flags = 0x0001;
546 preqparm->lv2.len = sizeof(struct lv2) + SECKEYBLOBSIZE;
547 preqparm->lv2.attr_len = sizeof(struct lv2)
548 - sizeof(preqparm->lv2.len) + SECKEYBLOBSIZE;
549 preqparm->lv2.attr_flags = 0x0000;
550 memcpy(preqparm->lv2.token, seckey->seckey, SECKEYBLOBSIZE);
551 preqcblk->req_parml = sizeof(struct uskreqparm) + SECKEYBLOBSIZE;
553 /* fill xcrb struct */
554 prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
556 /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
557 rc = _zcrypt_send_cprb(&xcrb);
560 "pkey_sec2protkey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
561 (int) cardnr, (int) domain, rc);
565 /* check response returncode and reasoncode */
566 if (prepcblk->ccp_rtcode != 0) {
568 "pkey_sec2protkey unwrap secure key failure, card response %d/%d\n",
569 (int) prepcblk->ccp_rtcode,
570 (int) prepcblk->ccp_rscode);
574 if (prepcblk->ccp_rscode != 0) {
576 "pkey_sec2protkey unwrap secure key warning, card response %d/%d\n",
577 (int) prepcblk->ccp_rtcode,
578 (int) prepcblk->ccp_rscode);
581 /* process response cprb param block */
582 prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
583 prepparm = (struct uskrepparm *) prepcblk->rpl_parmb;
585 /* check the returned keyblock */
586 if (prepparm->lv3.keyblock.version != 0x01) {
588 "pkey_sec2protkey reply param keyblock version mismatch 0x%02x != 0x01\n",
589 (int) prepparm->lv3.keyblock.version);
594 /* copy the tanslated protected key */
595 switch (prepparm->lv3.keyblock.keylen) {
597 protkey->type = PKEY_KEYTYPE_AES_128;
600 protkey->type = PKEY_KEYTYPE_AES_192;
603 protkey->type = PKEY_KEYTYPE_AES_256;
606 DEBUG_ERR("pkey_sec2protkey unknown/unsupported keytype %d\n",
607 prepparm->lv3.keyblock.keylen);
611 protkey->len = prepparm->lv3.keyblock.keylen;
612 memcpy(protkey->protkey, prepparm->lv3.keyblock.key, protkey->len);
615 free_cprbmem(mem, PARMBSIZE, 0);
618 EXPORT_SYMBOL(pkey_sec2protkey);
621 * Create a protected key from a clear key value.
623 int pkey_clr2protkey(u32 keytype,
624 const struct pkey_clrkey *clrkey,
625 struct pkey_protkey *protkey)
632 case PKEY_KEYTYPE_AES_128:
634 fc = CPACF_PCKMO_ENC_AES_128_KEY;
636 case PKEY_KEYTYPE_AES_192:
638 fc = CPACF_PCKMO_ENC_AES_192_KEY;
640 case PKEY_KEYTYPE_AES_256:
642 fc = CPACF_PCKMO_ENC_AES_256_KEY;
645 DEBUG_ERR("pkey_clr2protkey unknown/unsupported keytype %d\n",
650 /* prepare param block */
651 memset(paramblock, 0, sizeof(paramblock));
652 memcpy(paramblock, clrkey->clrkey, keysize);
654 /* call the pckmo instruction */
655 cpacf_pckmo(fc, paramblock);
657 /* copy created protected key */
658 protkey->type = keytype;
659 protkey->len = keysize + 32;
660 memcpy(protkey->protkey, paramblock, keysize + 32);
664 EXPORT_SYMBOL(pkey_clr2protkey);
667 * query cryptographic facility from adapter
669 static int query_crypto_facility(u16 cardnr, u16 domain,
671 u8 *rarray, size_t *rarraylen,
672 u8 *varray, size_t *varraylen)
677 struct CPRBX *preqcblk, *prepcblk;
678 struct ica_xcRB xcrb;
685 u8 data[VARDATASIZE];
689 size_t parmbsize = sizeof(struct fqreqparm);
695 /* get already prepared memory for 2 cprbs with param block each */
696 rc = alloc_and_prep_cprbmem(parmbsize, &mem, &preqcblk, &prepcblk);
700 /* fill request cprb struct */
701 preqcblk->domain = domain;
703 /* fill request cprb param block with FQ request */
704 preqparm = (struct fqreqparm *) preqcblk->req_parmb;
705 memcpy(preqparm->subfunc_code, "FQ", 2);
706 strncpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
707 preqparm->rule_array_len =
708 sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
709 preqparm->lv1.len = sizeof(preqparm->lv1);
710 preqparm->dummylen = sizeof(preqparm->dummylen);
711 preqcblk->req_parml = parmbsize;
713 /* fill xcrb struct */
714 prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
716 /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
717 rc = _zcrypt_send_cprb(&xcrb);
720 "query_crypto_facility zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
721 (int) cardnr, (int) domain, rc);
725 /* check response returncode and reasoncode */
726 if (prepcblk->ccp_rtcode != 0) {
728 "query_crypto_facility unwrap secure key failure, card response %d/%d\n",
729 (int) prepcblk->ccp_rtcode,
730 (int) prepcblk->ccp_rscode);
735 /* process response cprb param block */
736 prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
737 prepparm = (struct fqrepparm *) prepcblk->rpl_parmb;
738 ptr = prepparm->lvdata;
740 /* check and possibly copy reply rule array */
741 len = *((u16 *) ptr);
742 if (len > sizeof(u16)) {
745 if (rarray && rarraylen && *rarraylen > 0) {
746 *rarraylen = (len > *rarraylen ? *rarraylen : len);
747 memcpy(rarray, ptr, *rarraylen);
751 /* check and possible copy reply var array */
752 len = *((u16 *) ptr);
753 if (len > sizeof(u16)) {
756 if (varray && varraylen && *varraylen > 0) {
757 *varraylen = (len > *varraylen ? *varraylen : len);
758 memcpy(varray, ptr, *varraylen);
764 free_cprbmem(mem, parmbsize, 0);
769 * Fetch the current and old mkvp values via
770 * query_crypto_facility from adapter.
772 static int fetch_mkvp(u16 cardnr, u16 domain, u64 mkvp[2])
776 u8 *rarray, *varray, *pg;
778 pg = (u8 *) __get_free_page(GFP_KERNEL);
782 varray = pg + PAGE_SIZE/2;
783 rlen = vlen = PAGE_SIZE/2;
785 rc = query_crypto_facility(cardnr, domain, "STATICSA",
786 rarray, &rlen, varray, &vlen);
787 if (rc == 0 && rlen > 8*8 && vlen > 184+8) {
788 if (rarray[8*8] == '2') {
789 /* current master key state is valid */
790 mkvp[0] = *((u64 *)(varray + 184));
791 mkvp[1] = *((u64 *)(varray + 172));
796 free_page((unsigned long) pg);
798 return found ? 0 : -ENOENT;
801 /* struct to hold cached mkvp info for each card/domain */
803 struct list_head list;
809 /* a list with mkvp_info entries */
810 static LIST_HEAD(mkvp_list);
811 static DEFINE_SPINLOCK(mkvp_list_lock);
813 static int mkvp_cache_fetch(u16 cardnr, u16 domain, u64 mkvp[2])
816 struct mkvp_info *ptr;
818 spin_lock_bh(&mkvp_list_lock);
819 list_for_each_entry(ptr, &mkvp_list, list) {
820 if (ptr->cardnr == cardnr &&
821 ptr->domain == domain) {
822 memcpy(mkvp, ptr->mkvp, 2 * sizeof(u64));
827 spin_unlock_bh(&mkvp_list_lock);
832 static void mkvp_cache_update(u16 cardnr, u16 domain, u64 mkvp[2])
835 struct mkvp_info *ptr;
837 spin_lock_bh(&mkvp_list_lock);
838 list_for_each_entry(ptr, &mkvp_list, list) {
839 if (ptr->cardnr == cardnr &&
840 ptr->domain == domain) {
841 memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64));
847 ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
849 spin_unlock_bh(&mkvp_list_lock);
852 ptr->cardnr = cardnr;
853 ptr->domain = domain;
854 memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64));
855 list_add(&ptr->list, &mkvp_list);
857 spin_unlock_bh(&mkvp_list_lock);
860 static void mkvp_cache_scrub(u16 cardnr, u16 domain)
862 struct mkvp_info *ptr;
864 spin_lock_bh(&mkvp_list_lock);
865 list_for_each_entry(ptr, &mkvp_list, list) {
866 if (ptr->cardnr == cardnr &&
867 ptr->domain == domain) {
868 list_del(&ptr->list);
873 spin_unlock_bh(&mkvp_list_lock);
876 static void __exit mkvp_cache_free(void)
878 struct mkvp_info *ptr, *pnext;
880 spin_lock_bh(&mkvp_list_lock);
881 list_for_each_entry_safe(ptr, pnext, &mkvp_list, list) {
882 list_del(&ptr->list);
885 spin_unlock_bh(&mkvp_list_lock);
889 * Search for a matching crypto card based on the Master Key
890 * Verification Pattern provided inside a secure key.
892 int pkey_findcard(const struct pkey_seckey *seckey,
893 u16 *pcardnr, u16 *pdomain, int verify)
895 struct secaeskeytoken *t = (struct secaeskeytoken *) seckey;
896 struct zcrypt_device_matrix *device_matrix;
901 /* mkvp must not be zero */
905 /* fetch status of all crypto cards */
906 device_matrix = kmalloc(sizeof(struct zcrypt_device_matrix),
910 zcrypt_device_status_mask(device_matrix);
912 /* walk through all crypto cards */
913 for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
914 card = AP_QID_CARD(device_matrix->device[i].qid);
915 dom = AP_QID_QUEUE(device_matrix->device[i].qid);
916 if (device_matrix->device[i].online &&
917 device_matrix->device[i].functions & 0x04) {
918 /* an enabled CCA Coprocessor card */
919 /* try cached mkvp */
920 if (mkvp_cache_fetch(card, dom, mkvp) == 0 &&
921 t->mkvp == mkvp[0]) {
924 /* verify: fetch mkvp from adapter */
925 if (fetch_mkvp(card, dom, mkvp) == 0) {
926 mkvp_cache_update(card, dom, mkvp);
927 if (t->mkvp == mkvp[0])
932 /* Card is offline and/or not a CCA card. */
933 /* del mkvp entry from cache if it exists */
934 mkvp_cache_scrub(card, dom);
937 if (i >= MAX_ZDEV_ENTRIES) {
938 /* nothing found, so this time without cache */
939 for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
940 if (!(device_matrix->device[i].online &&
941 device_matrix->device[i].functions & 0x04))
943 card = AP_QID_CARD(device_matrix->device[i].qid);
944 dom = AP_QID_QUEUE(device_matrix->device[i].qid);
945 /* fresh fetch mkvp from adapter */
946 if (fetch_mkvp(card, dom, mkvp) == 0) {
947 mkvp_cache_update(card, dom, mkvp);
948 if (t->mkvp == mkvp[0])
950 if (t->mkvp == mkvp[1] && oi < 0)
954 if (i >= MAX_ZDEV_ENTRIES && oi >= 0) {
955 /* old mkvp matched, use this card then */
956 card = AP_QID_CARD(device_matrix->device[oi].qid);
957 dom = AP_QID_QUEUE(device_matrix->device[oi].qid);
960 if (i < MAX_ZDEV_ENTRIES || oi >= 0) {
969 kfree(device_matrix);
972 EXPORT_SYMBOL(pkey_findcard);
975 * Find card and transform secure key into protected key.
977 int pkey_skey2pkey(const struct pkey_seckey *seckey,
978 struct pkey_protkey *protkey)
984 * The pkey_sec2protkey call may fail when a card has been
985 * addressed where the master key was changed after last fetch
986 * of the mkvp into the cache. So first try without verify then
987 * with verify enabled (thus refreshing the mkvp for each card).
989 for (verify = 0; verify < 2; verify++) {
990 rc = pkey_findcard(seckey, &cardnr, &domain, verify);
993 rc = pkey_sec2protkey(cardnr, domain, seckey, protkey);
999 DEBUG_DBG("pkey_skey2pkey failed rc=%d\n", rc);
1003 EXPORT_SYMBOL(pkey_skey2pkey);
1006 * Verify key and give back some info about the key.
1008 int pkey_verifykey(const struct pkey_seckey *seckey,
1009 u16 *pcardnr, u16 *pdomain,
1010 u16 *pkeysize, u32 *pattributes)
1012 struct secaeskeytoken *t = (struct secaeskeytoken *) seckey;
1017 /* check the secure key for valid AES secure key */
1018 rc = check_secaeskeytoken((u8 *) seckey, 0);
1022 *pattributes = PKEY_VERIFY_ATTR_AES;
1024 *pkeysize = t->bitsize;
1026 /* try to find a card which can handle this key */
1027 rc = pkey_findcard(seckey, &cardnr, &domain, 1);
1031 /* check mkvp for old mkvp match */
1032 rc = mkvp_cache_fetch(cardnr, domain, mkvp);
1035 if (t->mkvp == mkvp[1]) {
1036 DEBUG_DBG("pkey_verifykey secure key has old mkvp\n");
1038 *pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP;
1047 DEBUG_DBG("pkey_verifykey rc=%d\n", rc);
1050 EXPORT_SYMBOL(pkey_verifykey);
1056 static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
1062 case PKEY_GENSECK: {
1063 struct pkey_genseck __user *ugs = (void __user *) arg;
1064 struct pkey_genseck kgs;
1066 if (copy_from_user(&kgs, ugs, sizeof(kgs)))
1068 rc = pkey_genseckey(kgs.cardnr, kgs.domain,
1069 kgs.keytype, &kgs.seckey);
1070 DEBUG_DBG("pkey_ioctl pkey_genseckey()=%d\n", rc);
1073 if (copy_to_user(ugs, &kgs, sizeof(kgs)))
1077 case PKEY_CLR2SECK: {
1078 struct pkey_clr2seck __user *ucs = (void __user *) arg;
1079 struct pkey_clr2seck kcs;
1081 if (copy_from_user(&kcs, ucs, sizeof(kcs)))
1083 rc = pkey_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype,
1084 &kcs.clrkey, &kcs.seckey);
1085 DEBUG_DBG("pkey_ioctl pkey_clr2seckey()=%d\n", rc);
1088 if (copy_to_user(ucs, &kcs, sizeof(kcs)))
1090 memzero_explicit(&kcs, sizeof(kcs));
1093 case PKEY_SEC2PROTK: {
1094 struct pkey_sec2protk __user *usp = (void __user *) arg;
1095 struct pkey_sec2protk ksp;
1097 if (copy_from_user(&ksp, usp, sizeof(ksp)))
1099 rc = pkey_sec2protkey(ksp.cardnr, ksp.domain,
1100 &ksp.seckey, &ksp.protkey);
1101 DEBUG_DBG("pkey_ioctl pkey_sec2protkey()=%d\n", rc);
1104 if (copy_to_user(usp, &ksp, sizeof(ksp)))
1108 case PKEY_CLR2PROTK: {
1109 struct pkey_clr2protk __user *ucp = (void __user *) arg;
1110 struct pkey_clr2protk kcp;
1112 if (copy_from_user(&kcp, ucp, sizeof(kcp)))
1114 rc = pkey_clr2protkey(kcp.keytype,
1115 &kcp.clrkey, &kcp.protkey);
1116 DEBUG_DBG("pkey_ioctl pkey_clr2protkey()=%d\n", rc);
1119 if (copy_to_user(ucp, &kcp, sizeof(kcp)))
1121 memzero_explicit(&kcp, sizeof(kcp));
1124 case PKEY_FINDCARD: {
1125 struct pkey_findcard __user *ufc = (void __user *) arg;
1126 struct pkey_findcard kfc;
1128 if (copy_from_user(&kfc, ufc, sizeof(kfc)))
1130 rc = pkey_findcard(&kfc.seckey,
1131 &kfc.cardnr, &kfc.domain, 1);
1132 DEBUG_DBG("pkey_ioctl pkey_findcard()=%d\n", rc);
1135 if (copy_to_user(ufc, &kfc, sizeof(kfc)))
1139 case PKEY_SKEY2PKEY: {
1140 struct pkey_skey2pkey __user *usp = (void __user *) arg;
1141 struct pkey_skey2pkey ksp;
1143 if (copy_from_user(&ksp, usp, sizeof(ksp)))
1145 rc = pkey_skey2pkey(&ksp.seckey, &ksp.protkey);
1146 DEBUG_DBG("pkey_ioctl pkey_skey2pkey()=%d\n", rc);
1149 if (copy_to_user(usp, &ksp, sizeof(ksp)))
1153 case PKEY_VERIFYKEY: {
1154 struct pkey_verifykey __user *uvk = (void __user *) arg;
1155 struct pkey_verifykey kvk;
1157 if (copy_from_user(&kvk, uvk, sizeof(kvk)))
1159 rc = pkey_verifykey(&kvk.seckey, &kvk.cardnr, &kvk.domain,
1160 &kvk.keysize, &kvk.attributes);
1161 DEBUG_DBG("pkey_ioctl pkey_verifykey()=%d\n", rc);
1164 if (copy_to_user(uvk, &kvk, sizeof(kvk)))
1169 /* unknown/unsupported ioctl cmd */
1177 * Sysfs and file io operations
1179 static const struct file_operations pkey_fops = {
1180 .owner = THIS_MODULE,
1181 .open = nonseekable_open,
1182 .llseek = no_llseek,
1183 .unlocked_ioctl = pkey_unlocked_ioctl,
1186 static struct miscdevice pkey_dev = {
1188 .minor = MISC_DYNAMIC_MINOR,
1196 static int __init pkey_init(void)
1198 cpacf_mask_t pckmo_functions;
1200 /* check for pckmo instructions available */
1201 if (!cpacf_query(CPACF_PCKMO, &pckmo_functions))
1203 if (!cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_128_KEY) ||
1204 !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_192_KEY) ||
1205 !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_256_KEY))
1210 return misc_register(&pkey_dev);
1216 static void __exit pkey_exit(void)
1218 misc_deregister(&pkey_dev);
1223 module_init(pkey_init);
1224 module_exit(pkey_exit);