1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * pkey device driver 4 * 5 * Copyright IBM Corp. 2017,2019 6 * Author(s): Harald Freudenberger 7 */ 8 9 #define KMSG_COMPONENT "pkey" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/fs.h> 13 #include <linux/init.h> 14 #include <linux/miscdevice.h> 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/kallsyms.h> 18 #include <linux/debugfs.h> 19 #include <linux/random.h> 20 #include <linux/cpufeature.h> 21 #include <asm/zcrypt.h> 22 #include <asm/cpacf.h> 23 #include <asm/pkey.h> 24 #include <crypto/aes.h> 25 26 #include "zcrypt_api.h" 27 #include "zcrypt_ccamisc.h" 28 #include "zcrypt_ep11misc.h" 29 30 MODULE_LICENSE("GPL"); 31 MODULE_AUTHOR("IBM Corporation"); 32 MODULE_DESCRIPTION("s390 protected key interface"); 33 34 #define KEYBLOBBUFSIZE 8192 /* key buffer size used for internal processing */ 35 #define PROTKEYBLOBBUFSIZE 256 /* protected key buffer size used internal */ 36 #define MAXAPQNSINLIST 64 /* max 64 apqns within a apqn list */ 37 38 /* 39 * debug feature data and functions 40 */ 41 42 static debug_info_t *debug_info; 43 44 #define DEBUG_DBG(...) debug_sprintf_event(debug_info, 6, ##__VA_ARGS__) 45 #define DEBUG_INFO(...) debug_sprintf_event(debug_info, 5, ##__VA_ARGS__) 46 #define DEBUG_WARN(...) debug_sprintf_event(debug_info, 4, ##__VA_ARGS__) 47 #define DEBUG_ERR(...) debug_sprintf_event(debug_info, 3, ##__VA_ARGS__) 48 49 static void __init pkey_debug_init(void) 50 { 51 /* 5 arguments per dbf entry (including the format string ptr) */ 52 debug_info = debug_register("pkey", 1, 1, 5 * sizeof(long)); 53 debug_register_view(debug_info, &debug_sprintf_view); 54 debug_set_level(debug_info, 3); 55 } 56 57 static void __exit pkey_debug_exit(void) 58 { 59 debug_unregister(debug_info); 60 } 61 62 /* inside view of a protected key token (only type 0x00 version 0x01) */ 63 struct protaeskeytoken { 64 u8 type; /* 0x00 for PAES specific key tokens */ 65 u8 res0[3]; 66 u8 version; /* should be 0x01 for protected AES key token */ 67 u8 res1[3]; 68 u32 keytype; /* key type, one of the PKEY_KEYTYPE values */ 69 u32 len; /* bytes actually stored in protkey[] */ 70 u8 protkey[MAXPROTKEYSIZE]; /* the protected key blob */ 71 } __packed; 72 73 /* inside view of a clear key token (type 0x00 version 0x02) */ 74 struct clearaeskeytoken { 75 u8 type; /* 0x00 for PAES specific key tokens */ 76 u8 res0[3]; 77 u8 version; /* 0x02 for clear AES key token */ 78 u8 res1[3]; 79 u32 keytype; /* key type, one of the PKEY_KEYTYPE values */ 80 u32 len; /* bytes actually stored in clearkey[] */ 81 u8 clearkey[]; /* clear key value */ 82 } __packed; 83 84 /* 85 * Create a protected key from a clear key value. 86 */ 87 static int pkey_clr2protkey(u32 keytype, 88 const struct pkey_clrkey *clrkey, 89 struct pkey_protkey *protkey) 90 { 91 /* mask of available pckmo subfunctions */ 92 static cpacf_mask_t pckmo_functions; 93 94 long fc; 95 int keysize; 96 u8 paramblock[64]; 97 98 switch (keytype) { 99 case PKEY_KEYTYPE_AES_128: 100 keysize = 16; 101 fc = CPACF_PCKMO_ENC_AES_128_KEY; 102 break; 103 case PKEY_KEYTYPE_AES_192: 104 keysize = 24; 105 fc = CPACF_PCKMO_ENC_AES_192_KEY; 106 break; 107 case PKEY_KEYTYPE_AES_256: 108 keysize = 32; 109 fc = CPACF_PCKMO_ENC_AES_256_KEY; 110 break; 111 default: 112 DEBUG_ERR("%s unknown/unsupported keytype %d\n", 113 __func__, keytype); 114 return -EINVAL; 115 } 116 117 /* Did we already check for PCKMO ? */ 118 if (!pckmo_functions.bytes[0]) { 119 /* no, so check now */ 120 if (!cpacf_query(CPACF_PCKMO, &pckmo_functions)) 121 return -ENODEV; 122 } 123 /* check for the pckmo subfunction we need now */ 124 if (!cpacf_test_func(&pckmo_functions, fc)) { 125 DEBUG_ERR("%s pckmo functions not available\n", __func__); 126 return -ENODEV; 127 } 128 129 /* prepare param block */ 130 memset(paramblock, 0, sizeof(paramblock)); 131 memcpy(paramblock, clrkey->clrkey, keysize); 132 133 /* call the pckmo instruction */ 134 cpacf_pckmo(fc, paramblock); 135 136 /* copy created protected key */ 137 protkey->type = keytype; 138 protkey->len = keysize + 32; 139 memcpy(protkey->protkey, paramblock, keysize + 32); 140 141 return 0; 142 } 143 144 /* 145 * Find card and transform secure key into protected key. 146 */ 147 static int pkey_skey2pkey(const u8 *key, struct pkey_protkey *pkey) 148 { 149 int rc, verify; 150 u16 cardnr, domain; 151 struct keytoken_header *hdr = (struct keytoken_header *)key; 152 153 zcrypt_wait_api_operational(); 154 155 /* 156 * The cca_xxx2protkey call may fail when a card has been 157 * addressed where the master key was changed after last fetch 158 * of the mkvp into the cache. Try 3 times: First without verify 159 * then with verify and last round with verify and old master 160 * key verification pattern match not ignored. 161 */ 162 for (verify = 0; verify < 3; verify++) { 163 rc = cca_findcard(key, &cardnr, &domain, verify); 164 if (rc < 0) 165 continue; 166 if (rc > 0 && verify < 2) 167 continue; 168 switch (hdr->version) { 169 case TOKVER_CCA_AES: 170 rc = cca_sec2protkey(cardnr, domain, 171 key, pkey->protkey, 172 &pkey->len, &pkey->type); 173 break; 174 case TOKVER_CCA_VLSC: 175 rc = cca_cipher2protkey(cardnr, domain, 176 key, pkey->protkey, 177 &pkey->len, &pkey->type); 178 break; 179 default: 180 return -EINVAL; 181 } 182 if (rc == 0) 183 break; 184 } 185 186 if (rc) 187 DEBUG_DBG("%s failed rc=%d\n", __func__, rc); 188 189 return rc; 190 } 191 192 /* 193 * Construct EP11 key with given clear key value. 194 */ 195 static int pkey_clr2ep11key(const u8 *clrkey, size_t clrkeylen, 196 u8 *keybuf, size_t *keybuflen) 197 { 198 int i, rc; 199 u16 card, dom; 200 u32 nr_apqns, *apqns = NULL; 201 202 zcrypt_wait_api_operational(); 203 204 /* build a list of apqns suitable for ep11 keys with cpacf support */ 205 rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF, 206 ZCRYPT_CEX7, EP11_API_V, NULL); 207 if (rc) 208 goto out; 209 210 /* go through the list of apqns and try to bild an ep11 key */ 211 for (rc = -ENODEV, i = 0; i < nr_apqns; i++) { 212 card = apqns[i] >> 16; 213 dom = apqns[i] & 0xFFFF; 214 rc = ep11_clr2keyblob(card, dom, clrkeylen * 8, 215 0, clrkey, keybuf, keybuflen); 216 if (rc == 0) 217 break; 218 } 219 220 out: 221 kfree(apqns); 222 if (rc) 223 DEBUG_DBG("%s failed rc=%d\n", __func__, rc); 224 return rc; 225 } 226 227 /* 228 * Find card and transform EP11 secure key into protected key. 229 */ 230 static int pkey_ep11key2pkey(const u8 *key, struct pkey_protkey *pkey) 231 { 232 int i, rc; 233 u16 card, dom; 234 u32 nr_apqns, *apqns = NULL; 235 struct ep11keyblob *kb = (struct ep11keyblob *)key; 236 237 zcrypt_wait_api_operational(); 238 239 /* build a list of apqns suitable for this key */ 240 rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF, 241 ZCRYPT_CEX7, EP11_API_V, kb->wkvp); 242 if (rc) 243 goto out; 244 245 /* go through the list of apqns and try to derive an pkey */ 246 for (rc = -ENODEV, i = 0; i < nr_apqns; i++) { 247 card = apqns[i] >> 16; 248 dom = apqns[i] & 0xFFFF; 249 pkey->len = sizeof(pkey->protkey); 250 rc = ep11_kblob2protkey(card, dom, key, kb->head.len, 251 pkey->protkey, &pkey->len, &pkey->type); 252 if (rc == 0) 253 break; 254 } 255 256 out: 257 kfree(apqns); 258 if (rc) 259 DEBUG_DBG("%s failed rc=%d\n", __func__, rc); 260 return rc; 261 } 262 263 /* 264 * Verify key and give back some info about the key. 265 */ 266 static int pkey_verifykey(const struct pkey_seckey *seckey, 267 u16 *pcardnr, u16 *pdomain, 268 u16 *pkeysize, u32 *pattributes) 269 { 270 struct secaeskeytoken *t = (struct secaeskeytoken *)seckey; 271 u16 cardnr, domain; 272 int rc; 273 274 /* check the secure key for valid AES secure key */ 275 rc = cca_check_secaeskeytoken(debug_info, 3, (u8 *)seckey, 0); 276 if (rc) 277 goto out; 278 if (pattributes) 279 *pattributes = PKEY_VERIFY_ATTR_AES; 280 if (pkeysize) 281 *pkeysize = t->bitsize; 282 283 /* try to find a card which can handle this key */ 284 rc = cca_findcard(seckey->seckey, &cardnr, &domain, 1); 285 if (rc < 0) 286 goto out; 287 288 if (rc > 0) { 289 /* key mkvp matches to old master key mkvp */ 290 DEBUG_DBG("%s secure key has old mkvp\n", __func__); 291 if (pattributes) 292 *pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP; 293 rc = 0; 294 } 295 296 if (pcardnr) 297 *pcardnr = cardnr; 298 if (pdomain) 299 *pdomain = domain; 300 301 out: 302 DEBUG_DBG("%s rc=%d\n", __func__, rc); 303 return rc; 304 } 305 306 /* 307 * Generate a random protected key 308 */ 309 static int pkey_genprotkey(u32 keytype, struct pkey_protkey *protkey) 310 { 311 struct pkey_clrkey clrkey; 312 int keysize; 313 int rc; 314 315 switch (keytype) { 316 case PKEY_KEYTYPE_AES_128: 317 keysize = 16; 318 break; 319 case PKEY_KEYTYPE_AES_192: 320 keysize = 24; 321 break; 322 case PKEY_KEYTYPE_AES_256: 323 keysize = 32; 324 break; 325 default: 326 DEBUG_ERR("%s unknown/unsupported keytype %d\n", __func__, 327 keytype); 328 return -EINVAL; 329 } 330 331 /* generate a dummy random clear key */ 332 get_random_bytes(clrkey.clrkey, keysize); 333 334 /* convert it to a dummy protected key */ 335 rc = pkey_clr2protkey(keytype, &clrkey, protkey); 336 if (rc) 337 return rc; 338 339 /* replace the key part of the protected key with random bytes */ 340 get_random_bytes(protkey->protkey, keysize); 341 342 return 0; 343 } 344 345 /* 346 * Verify if a protected key is still valid 347 */ 348 static int pkey_verifyprotkey(const struct pkey_protkey *protkey) 349 { 350 unsigned long fc; 351 struct { 352 u8 iv[AES_BLOCK_SIZE]; 353 u8 key[MAXPROTKEYSIZE]; 354 } param; 355 u8 null_msg[AES_BLOCK_SIZE]; 356 u8 dest_buf[AES_BLOCK_SIZE]; 357 unsigned int k; 358 359 switch (protkey->type) { 360 case PKEY_KEYTYPE_AES_128: 361 fc = CPACF_KMC_PAES_128; 362 break; 363 case PKEY_KEYTYPE_AES_192: 364 fc = CPACF_KMC_PAES_192; 365 break; 366 case PKEY_KEYTYPE_AES_256: 367 fc = CPACF_KMC_PAES_256; 368 break; 369 default: 370 DEBUG_ERR("%s unknown/unsupported keytype %d\n", __func__, 371 protkey->type); 372 return -EINVAL; 373 } 374 375 memset(null_msg, 0, sizeof(null_msg)); 376 377 memset(param.iv, 0, sizeof(param.iv)); 378 memcpy(param.key, protkey->protkey, sizeof(param.key)); 379 380 k = cpacf_kmc(fc | CPACF_ENCRYPT, ¶m, null_msg, dest_buf, 381 sizeof(null_msg)); 382 if (k != sizeof(null_msg)) { 383 DEBUG_ERR("%s protected key is not valid\n", __func__); 384 return -EKEYREJECTED; 385 } 386 387 return 0; 388 } 389 390 /* 391 * Transform a non-CCA key token into a protected key 392 */ 393 static int pkey_nonccatok2pkey(const u8 *key, u32 keylen, 394 struct pkey_protkey *protkey) 395 { 396 int rc = -EINVAL; 397 u8 *tmpbuf = NULL; 398 struct keytoken_header *hdr = (struct keytoken_header *)key; 399 400 switch (hdr->version) { 401 case TOKVER_PROTECTED_KEY: { 402 struct protaeskeytoken *t; 403 404 if (keylen != sizeof(struct protaeskeytoken)) 405 goto out; 406 t = (struct protaeskeytoken *)key; 407 protkey->len = t->len; 408 protkey->type = t->keytype; 409 memcpy(protkey->protkey, t->protkey, 410 sizeof(protkey->protkey)); 411 rc = pkey_verifyprotkey(protkey); 412 break; 413 } 414 case TOKVER_CLEAR_KEY: { 415 struct clearaeskeytoken *t; 416 struct pkey_clrkey ckey; 417 union u_tmpbuf { 418 u8 skey[SECKEYBLOBSIZE]; 419 u8 ep11key[MAXEP11AESKEYBLOBSIZE]; 420 }; 421 size_t tmpbuflen = sizeof(union u_tmpbuf); 422 423 if (keylen < sizeof(struct clearaeskeytoken)) 424 goto out; 425 t = (struct clearaeskeytoken *)key; 426 if (keylen != sizeof(*t) + t->len) 427 goto out; 428 if ((t->keytype == PKEY_KEYTYPE_AES_128 && t->len == 16) || 429 (t->keytype == PKEY_KEYTYPE_AES_192 && t->len == 24) || 430 (t->keytype == PKEY_KEYTYPE_AES_256 && t->len == 32)) 431 memcpy(ckey.clrkey, t->clearkey, t->len); 432 else 433 goto out; 434 /* alloc temp key buffer space */ 435 tmpbuf = kmalloc(tmpbuflen, GFP_ATOMIC); 436 if (!tmpbuf) { 437 rc = -ENOMEM; 438 goto out; 439 } 440 /* try direct way with the PCKMO instruction */ 441 rc = pkey_clr2protkey(t->keytype, &ckey, protkey); 442 if (rc == 0) 443 break; 444 /* PCKMO failed, so try the CCA secure key way */ 445 zcrypt_wait_api_operational(); 446 rc = cca_clr2seckey(0xFFFF, 0xFFFF, t->keytype, 447 ckey.clrkey, tmpbuf); 448 if (rc == 0) 449 rc = pkey_skey2pkey(tmpbuf, protkey); 450 if (rc == 0) 451 break; 452 /* if the CCA way also failed, let's try via EP11 */ 453 rc = pkey_clr2ep11key(ckey.clrkey, t->len, 454 tmpbuf, &tmpbuflen); 455 if (rc == 0) 456 rc = pkey_ep11key2pkey(tmpbuf, protkey); 457 /* now we should really have an protected key */ 458 DEBUG_ERR("%s unable to build protected key from clear", 459 __func__); 460 break; 461 } 462 case TOKVER_EP11_AES: { 463 /* check ep11 key for exportable as protected key */ 464 rc = ep11_check_aes_key(debug_info, 3, key, keylen, 1); 465 if (rc) 466 goto out; 467 rc = pkey_ep11key2pkey(key, protkey); 468 break; 469 } 470 case TOKVER_EP11_AES_WITH_HEADER: 471 /* check ep11 key with header for exportable as protected key */ 472 rc = ep11_check_aes_key_with_hdr(debug_info, 3, key, keylen, 1); 473 if (rc) 474 goto out; 475 rc = pkey_ep11key2pkey(key + sizeof(struct ep11kblob_header), 476 protkey); 477 break; 478 default: 479 DEBUG_ERR("%s unknown/unsupported non-CCA token version %d\n", 480 __func__, hdr->version); 481 rc = -EINVAL; 482 } 483 484 out: 485 kfree(tmpbuf); 486 return rc; 487 } 488 489 /* 490 * Transform a CCA internal key token into a protected key 491 */ 492 static int pkey_ccainttok2pkey(const u8 *key, u32 keylen, 493 struct pkey_protkey *protkey) 494 { 495 struct keytoken_header *hdr = (struct keytoken_header *)key; 496 497 switch (hdr->version) { 498 case TOKVER_CCA_AES: 499 if (keylen != sizeof(struct secaeskeytoken)) 500 return -EINVAL; 501 break; 502 case TOKVER_CCA_VLSC: 503 if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE) 504 return -EINVAL; 505 break; 506 default: 507 DEBUG_ERR("%s unknown/unsupported CCA internal token version %d\n", 508 __func__, hdr->version); 509 return -EINVAL; 510 } 511 512 return pkey_skey2pkey(key, protkey); 513 } 514 515 /* 516 * Transform a key blob (of any type) into a protected key 517 */ 518 int pkey_keyblob2pkey(const u8 *key, u32 keylen, 519 struct pkey_protkey *protkey) 520 { 521 int rc; 522 struct keytoken_header *hdr = (struct keytoken_header *)key; 523 524 if (keylen < sizeof(struct keytoken_header)) { 525 DEBUG_ERR("%s invalid keylen %d\n", __func__, keylen); 526 return -EINVAL; 527 } 528 529 switch (hdr->type) { 530 case TOKTYPE_NON_CCA: 531 rc = pkey_nonccatok2pkey(key, keylen, protkey); 532 break; 533 case TOKTYPE_CCA_INTERNAL: 534 rc = pkey_ccainttok2pkey(key, keylen, protkey); 535 break; 536 default: 537 DEBUG_ERR("%s unknown/unsupported blob type %d\n", 538 __func__, hdr->type); 539 return -EINVAL; 540 } 541 542 DEBUG_DBG("%s rc=%d\n", __func__, rc); 543 return rc; 544 } 545 EXPORT_SYMBOL(pkey_keyblob2pkey); 546 547 static int pkey_genseckey2(const struct pkey_apqn *apqns, size_t nr_apqns, 548 enum pkey_key_type ktype, enum pkey_key_size ksize, 549 u32 kflags, u8 *keybuf, size_t *keybufsize) 550 { 551 int i, card, dom, rc; 552 553 /* check for at least one apqn given */ 554 if (!apqns || !nr_apqns) 555 return -EINVAL; 556 557 /* check key type and size */ 558 switch (ktype) { 559 case PKEY_TYPE_CCA_DATA: 560 case PKEY_TYPE_CCA_CIPHER: 561 if (*keybufsize < SECKEYBLOBSIZE) 562 return -EINVAL; 563 break; 564 case PKEY_TYPE_EP11: 565 if (*keybufsize < MINEP11AESKEYBLOBSIZE) 566 return -EINVAL; 567 break; 568 default: 569 return -EINVAL; 570 } 571 switch (ksize) { 572 case PKEY_SIZE_AES_128: 573 case PKEY_SIZE_AES_192: 574 case PKEY_SIZE_AES_256: 575 break; 576 default: 577 return -EINVAL; 578 } 579 580 /* simple try all apqns from the list */ 581 for (i = 0, rc = -ENODEV; i < nr_apqns; i++) { 582 card = apqns[i].card; 583 dom = apqns[i].domain; 584 if (ktype == PKEY_TYPE_EP11) { 585 rc = ep11_genaeskey(card, dom, ksize, kflags, 586 keybuf, keybufsize); 587 } else if (ktype == PKEY_TYPE_CCA_DATA) { 588 rc = cca_genseckey(card, dom, ksize, keybuf); 589 *keybufsize = (rc ? 0 : SECKEYBLOBSIZE); 590 } else { 591 /* TOKVER_CCA_VLSC */ 592 rc = cca_gencipherkey(card, dom, ksize, kflags, 593 keybuf, keybufsize); 594 } 595 if (rc == 0) 596 break; 597 } 598 599 return rc; 600 } 601 602 static int pkey_clr2seckey2(const struct pkey_apqn *apqns, size_t nr_apqns, 603 enum pkey_key_type ktype, enum pkey_key_size ksize, 604 u32 kflags, const u8 *clrkey, 605 u8 *keybuf, size_t *keybufsize) 606 { 607 int i, card, dom, rc; 608 609 /* check for at least one apqn given */ 610 if (!apqns || !nr_apqns) 611 return -EINVAL; 612 613 /* check key type and size */ 614 switch (ktype) { 615 case PKEY_TYPE_CCA_DATA: 616 case PKEY_TYPE_CCA_CIPHER: 617 if (*keybufsize < SECKEYBLOBSIZE) 618 return -EINVAL; 619 break; 620 case PKEY_TYPE_EP11: 621 if (*keybufsize < MINEP11AESKEYBLOBSIZE) 622 return -EINVAL; 623 break; 624 default: 625 return -EINVAL; 626 } 627 switch (ksize) { 628 case PKEY_SIZE_AES_128: 629 case PKEY_SIZE_AES_192: 630 case PKEY_SIZE_AES_256: 631 break; 632 default: 633 return -EINVAL; 634 } 635 636 zcrypt_wait_api_operational(); 637 638 /* simple try all apqns from the list */ 639 for (i = 0, rc = -ENODEV; i < nr_apqns; i++) { 640 card = apqns[i].card; 641 dom = apqns[i].domain; 642 if (ktype == PKEY_TYPE_EP11) { 643 rc = ep11_clr2keyblob(card, dom, ksize, kflags, 644 clrkey, keybuf, keybufsize); 645 } else if (ktype == PKEY_TYPE_CCA_DATA) { 646 rc = cca_clr2seckey(card, dom, ksize, 647 clrkey, keybuf); 648 *keybufsize = (rc ? 0 : SECKEYBLOBSIZE); 649 } else { 650 /* TOKVER_CCA_VLSC */ 651 rc = cca_clr2cipherkey(card, dom, ksize, kflags, 652 clrkey, keybuf, keybufsize); 653 } 654 if (rc == 0) 655 break; 656 } 657 658 return rc; 659 } 660 661 static int pkey_verifykey2(const u8 *key, size_t keylen, 662 u16 *cardnr, u16 *domain, 663 enum pkey_key_type *ktype, 664 enum pkey_key_size *ksize, u32 *flags) 665 { 666 int rc; 667 u32 _nr_apqns, *_apqns = NULL; 668 struct keytoken_header *hdr = (struct keytoken_header *)key; 669 670 if (keylen < sizeof(struct keytoken_header)) 671 return -EINVAL; 672 673 if (hdr->type == TOKTYPE_CCA_INTERNAL && 674 hdr->version == TOKVER_CCA_AES) { 675 struct secaeskeytoken *t = (struct secaeskeytoken *)key; 676 677 rc = cca_check_secaeskeytoken(debug_info, 3, key, 0); 678 if (rc) 679 goto out; 680 if (ktype) 681 *ktype = PKEY_TYPE_CCA_DATA; 682 if (ksize) 683 *ksize = (enum pkey_key_size)t->bitsize; 684 685 rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, 686 ZCRYPT_CEX3C, AES_MK_SET, t->mkvp, 0, 1); 687 if (rc == 0 && flags) 688 *flags = PKEY_FLAGS_MATCH_CUR_MKVP; 689 if (rc == -ENODEV) { 690 rc = cca_findcard2(&_apqns, &_nr_apqns, 691 *cardnr, *domain, 692 ZCRYPT_CEX3C, AES_MK_SET, 693 0, t->mkvp, 1); 694 if (rc == 0 && flags) 695 *flags = PKEY_FLAGS_MATCH_ALT_MKVP; 696 } 697 if (rc) 698 goto out; 699 700 *cardnr = ((struct pkey_apqn *)_apqns)->card; 701 *domain = ((struct pkey_apqn *)_apqns)->domain; 702 703 } else if (hdr->type == TOKTYPE_CCA_INTERNAL && 704 hdr->version == TOKVER_CCA_VLSC) { 705 struct cipherkeytoken *t = (struct cipherkeytoken *)key; 706 707 rc = cca_check_secaescipherkey(debug_info, 3, key, 0, 1); 708 if (rc) 709 goto out; 710 if (ktype) 711 *ktype = PKEY_TYPE_CCA_CIPHER; 712 if (ksize) { 713 *ksize = PKEY_SIZE_UNKNOWN; 714 if (!t->plfver && t->wpllen == 512) 715 *ksize = PKEY_SIZE_AES_128; 716 else if (!t->plfver && t->wpllen == 576) 717 *ksize = PKEY_SIZE_AES_192; 718 else if (!t->plfver && t->wpllen == 640) 719 *ksize = PKEY_SIZE_AES_256; 720 } 721 722 rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, 723 ZCRYPT_CEX6, AES_MK_SET, t->mkvp0, 0, 1); 724 if (rc == 0 && flags) 725 *flags = PKEY_FLAGS_MATCH_CUR_MKVP; 726 if (rc == -ENODEV) { 727 rc = cca_findcard2(&_apqns, &_nr_apqns, 728 *cardnr, *domain, 729 ZCRYPT_CEX6, AES_MK_SET, 730 0, t->mkvp0, 1); 731 if (rc == 0 && flags) 732 *flags = PKEY_FLAGS_MATCH_ALT_MKVP; 733 } 734 if (rc) 735 goto out; 736 737 *cardnr = ((struct pkey_apqn *)_apqns)->card; 738 *domain = ((struct pkey_apqn *)_apqns)->domain; 739 740 } else if (hdr->type == TOKTYPE_NON_CCA && 741 hdr->version == TOKVER_EP11_AES) { 742 struct ep11keyblob *kb = (struct ep11keyblob *)key; 743 744 rc = ep11_check_aes_key(debug_info, 3, key, keylen, 1); 745 if (rc) 746 goto out; 747 if (ktype) 748 *ktype = PKEY_TYPE_EP11; 749 if (ksize) 750 *ksize = kb->head.keybitlen; 751 752 rc = ep11_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, 753 ZCRYPT_CEX7, EP11_API_V, kb->wkvp); 754 if (rc) 755 goto out; 756 757 if (flags) 758 *flags = PKEY_FLAGS_MATCH_CUR_MKVP; 759 760 *cardnr = ((struct pkey_apqn *)_apqns)->card; 761 *domain = ((struct pkey_apqn *)_apqns)->domain; 762 763 } else { 764 rc = -EINVAL; 765 } 766 767 out: 768 kfree(_apqns); 769 return rc; 770 } 771 772 static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns, 773 const u8 *key, size_t keylen, 774 struct pkey_protkey *pkey) 775 { 776 int i, card, dom, rc; 777 struct keytoken_header *hdr = (struct keytoken_header *)key; 778 779 /* check for at least one apqn given */ 780 if (!apqns || !nr_apqns) 781 return -EINVAL; 782 783 if (keylen < sizeof(struct keytoken_header)) 784 return -EINVAL; 785 786 if (hdr->type == TOKTYPE_CCA_INTERNAL) { 787 if (hdr->version == TOKVER_CCA_AES) { 788 if (keylen != sizeof(struct secaeskeytoken)) 789 return -EINVAL; 790 if (cca_check_secaeskeytoken(debug_info, 3, key, 0)) 791 return -EINVAL; 792 } else if (hdr->version == TOKVER_CCA_VLSC) { 793 if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE) 794 return -EINVAL; 795 if (cca_check_secaescipherkey(debug_info, 3, key, 0, 1)) 796 return -EINVAL; 797 } else { 798 DEBUG_ERR("%s unknown CCA internal token version %d\n", 799 __func__, hdr->version); 800 return -EINVAL; 801 } 802 } else if (hdr->type == TOKTYPE_NON_CCA) { 803 if (hdr->version == TOKVER_EP11_AES) { 804 if (keylen < sizeof(struct ep11keyblob)) 805 return -EINVAL; 806 if (ep11_check_aes_key(debug_info, 3, key, keylen, 1)) 807 return -EINVAL; 808 } else { 809 return pkey_nonccatok2pkey(key, keylen, pkey); 810 } 811 } else { 812 DEBUG_ERR("%s unknown/unsupported blob type %d\n", 813 __func__, hdr->type); 814 return -EINVAL; 815 } 816 817 zcrypt_wait_api_operational(); 818 819 /* simple try all apqns from the list */ 820 for (i = 0, rc = -ENODEV; i < nr_apqns; i++) { 821 card = apqns[i].card; 822 dom = apqns[i].domain; 823 if (hdr->type == TOKTYPE_CCA_INTERNAL && 824 hdr->version == TOKVER_CCA_AES) { 825 rc = cca_sec2protkey(card, dom, key, pkey->protkey, 826 &pkey->len, &pkey->type); 827 } else if (hdr->type == TOKTYPE_CCA_INTERNAL && 828 hdr->version == TOKVER_CCA_VLSC) { 829 rc = cca_cipher2protkey(card, dom, key, pkey->protkey, 830 &pkey->len, &pkey->type); 831 } else { 832 /* EP11 AES secure key blob */ 833 struct ep11keyblob *kb = (struct ep11keyblob *)key; 834 835 pkey->len = sizeof(pkey->protkey); 836 rc = ep11_kblob2protkey(card, dom, key, kb->head.len, 837 pkey->protkey, &pkey->len, 838 &pkey->type); 839 } 840 if (rc == 0) 841 break; 842 } 843 844 return rc; 845 } 846 847 static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags, 848 struct pkey_apqn *apqns, size_t *nr_apqns) 849 { 850 int rc; 851 u32 _nr_apqns, *_apqns = NULL; 852 struct keytoken_header *hdr = (struct keytoken_header *)key; 853 854 if (keylen < sizeof(struct keytoken_header) || flags == 0) 855 return -EINVAL; 856 857 zcrypt_wait_api_operational(); 858 859 if (hdr->type == TOKTYPE_NON_CCA && 860 (hdr->version == TOKVER_EP11_AES_WITH_HEADER || 861 hdr->version == TOKVER_EP11_ECC_WITH_HEADER) && 862 is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { 863 int minhwtype = 0, api = 0; 864 struct ep11keyblob *kb = (struct ep11keyblob *) 865 (key + sizeof(struct ep11kblob_header)); 866 867 if (flags != PKEY_FLAGS_MATCH_CUR_MKVP) 868 return -EINVAL; 869 if (kb->attr & EP11_BLOB_PKEY_EXTRACTABLE) { 870 minhwtype = ZCRYPT_CEX7; 871 api = EP11_API_V; 872 } 873 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 874 minhwtype, api, kb->wkvp); 875 if (rc) 876 goto out; 877 } else if (hdr->type == TOKTYPE_NON_CCA && 878 hdr->version == TOKVER_EP11_AES && 879 is_ep11_keyblob(key)) { 880 int minhwtype = 0, api = 0; 881 struct ep11keyblob *kb = (struct ep11keyblob *)key; 882 883 if (flags != PKEY_FLAGS_MATCH_CUR_MKVP) 884 return -EINVAL; 885 if (kb->attr & EP11_BLOB_PKEY_EXTRACTABLE) { 886 minhwtype = ZCRYPT_CEX7; 887 api = EP11_API_V; 888 } 889 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 890 minhwtype, api, kb->wkvp); 891 if (rc) 892 goto out; 893 } else if (hdr->type == TOKTYPE_CCA_INTERNAL) { 894 int minhwtype = ZCRYPT_CEX3C; 895 u64 cur_mkvp = 0, old_mkvp = 0; 896 897 if (hdr->version == TOKVER_CCA_AES) { 898 struct secaeskeytoken *t = (struct secaeskeytoken *)key; 899 900 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 901 cur_mkvp = t->mkvp; 902 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) 903 old_mkvp = t->mkvp; 904 } else if (hdr->version == TOKVER_CCA_VLSC) { 905 struct cipherkeytoken *t = (struct cipherkeytoken *)key; 906 907 minhwtype = ZCRYPT_CEX6; 908 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 909 cur_mkvp = t->mkvp0; 910 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) 911 old_mkvp = t->mkvp0; 912 } else { 913 /* unknown cca internal token type */ 914 return -EINVAL; 915 } 916 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 917 minhwtype, AES_MK_SET, 918 cur_mkvp, old_mkvp, 1); 919 if (rc) 920 goto out; 921 } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) { 922 u64 cur_mkvp = 0, old_mkvp = 0; 923 struct eccprivkeytoken *t = (struct eccprivkeytoken *)key; 924 925 if (t->secid == 0x20) { 926 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 927 cur_mkvp = t->mkvp; 928 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) 929 old_mkvp = t->mkvp; 930 } else { 931 /* unknown cca internal 2 token type */ 932 return -EINVAL; 933 } 934 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 935 ZCRYPT_CEX7, APKA_MK_SET, 936 cur_mkvp, old_mkvp, 1); 937 if (rc) 938 goto out; 939 } else { 940 return -EINVAL; 941 } 942 943 if (apqns) { 944 if (*nr_apqns < _nr_apqns) 945 rc = -ENOSPC; 946 else 947 memcpy(apqns, _apqns, _nr_apqns * sizeof(u32)); 948 } 949 *nr_apqns = _nr_apqns; 950 951 out: 952 kfree(_apqns); 953 return rc; 954 } 955 956 static int pkey_apqns4keytype(enum pkey_key_type ktype, 957 u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags, 958 struct pkey_apqn *apqns, size_t *nr_apqns) 959 { 960 int rc; 961 u32 _nr_apqns, *_apqns = NULL; 962 963 zcrypt_wait_api_operational(); 964 965 if (ktype == PKEY_TYPE_CCA_DATA || ktype == PKEY_TYPE_CCA_CIPHER) { 966 u64 cur_mkvp = 0, old_mkvp = 0; 967 int minhwtype = ZCRYPT_CEX3C; 968 969 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 970 cur_mkvp = *((u64 *)cur_mkvp); 971 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) 972 old_mkvp = *((u64 *)alt_mkvp); 973 if (ktype == PKEY_TYPE_CCA_CIPHER) 974 minhwtype = ZCRYPT_CEX6; 975 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 976 minhwtype, AES_MK_SET, 977 cur_mkvp, old_mkvp, 1); 978 if (rc) 979 goto out; 980 } else if (ktype == PKEY_TYPE_CCA_ECC) { 981 u64 cur_mkvp = 0, old_mkvp = 0; 982 983 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 984 cur_mkvp = *((u64 *)cur_mkvp); 985 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) 986 old_mkvp = *((u64 *)alt_mkvp); 987 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 988 ZCRYPT_CEX7, APKA_MK_SET, 989 cur_mkvp, old_mkvp, 1); 990 if (rc) 991 goto out; 992 993 } else if (ktype == PKEY_TYPE_EP11 || 994 ktype == PKEY_TYPE_EP11_AES || 995 ktype == PKEY_TYPE_EP11_ECC) { 996 u8 *wkvp = NULL; 997 998 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) 999 wkvp = cur_mkvp; 1000 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, 1001 ZCRYPT_CEX7, EP11_API_V, wkvp); 1002 if (rc) 1003 goto out; 1004 1005 } else { 1006 return -EINVAL; 1007 } 1008 1009 if (apqns) { 1010 if (*nr_apqns < _nr_apqns) 1011 rc = -ENOSPC; 1012 else 1013 memcpy(apqns, _apqns, _nr_apqns * sizeof(u32)); 1014 } 1015 *nr_apqns = _nr_apqns; 1016 1017 out: 1018 kfree(_apqns); 1019 return rc; 1020 } 1021 1022 static int pkey_keyblob2pkey3(const struct pkey_apqn *apqns, size_t nr_apqns, 1023 const u8 *key, size_t keylen, u32 *protkeytype, 1024 u8 *protkey, u32 *protkeylen) 1025 { 1026 int i, card, dom, rc; 1027 struct keytoken_header *hdr = (struct keytoken_header *)key; 1028 1029 /* check for at least one apqn given */ 1030 if (!apqns || !nr_apqns) 1031 return -EINVAL; 1032 1033 if (keylen < sizeof(struct keytoken_header)) 1034 return -EINVAL; 1035 1036 if (hdr->type == TOKTYPE_NON_CCA && 1037 hdr->version == TOKVER_EP11_AES_WITH_HEADER && 1038 is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { 1039 /* EP11 AES key blob with header */ 1040 if (ep11_check_aes_key_with_hdr(debug_info, 3, key, keylen, 1)) 1041 return -EINVAL; 1042 } else if (hdr->type == TOKTYPE_NON_CCA && 1043 hdr->version == TOKVER_EP11_ECC_WITH_HEADER && 1044 is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { 1045 /* EP11 ECC key blob with header */ 1046 if (ep11_check_ecc_key_with_hdr(debug_info, 3, key, keylen, 1)) 1047 return -EINVAL; 1048 } else if (hdr->type == TOKTYPE_NON_CCA && 1049 hdr->version == TOKVER_EP11_AES && 1050 is_ep11_keyblob(key)) { 1051 /* EP11 AES key blob with header in session field */ 1052 if (ep11_check_aes_key(debug_info, 3, key, keylen, 1)) 1053 return -EINVAL; 1054 } else if (hdr->type == TOKTYPE_CCA_INTERNAL) { 1055 if (hdr->version == TOKVER_CCA_AES) { 1056 /* CCA AES data key */ 1057 if (keylen != sizeof(struct secaeskeytoken)) 1058 return -EINVAL; 1059 if (cca_check_secaeskeytoken(debug_info, 3, key, 0)) 1060 return -EINVAL; 1061 } else if (hdr->version == TOKVER_CCA_VLSC) { 1062 /* CCA AES cipher key */ 1063 if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE) 1064 return -EINVAL; 1065 if (cca_check_secaescipherkey(debug_info, 3, key, 0, 1)) 1066 return -EINVAL; 1067 } else { 1068 DEBUG_ERR("%s unknown CCA internal token version %d\n", 1069 __func__, hdr->version); 1070 return -EINVAL; 1071 } 1072 } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) { 1073 /* CCA ECC (private) key */ 1074 if (keylen < sizeof(struct eccprivkeytoken)) 1075 return -EINVAL; 1076 if (cca_check_sececckeytoken(debug_info, 3, key, keylen, 1)) 1077 return -EINVAL; 1078 } else if (hdr->type == TOKTYPE_NON_CCA) { 1079 struct pkey_protkey pkey; 1080 1081 rc = pkey_nonccatok2pkey(key, keylen, &pkey); 1082 if (rc) 1083 return rc; 1084 memcpy(protkey, pkey.protkey, pkey.len); 1085 *protkeylen = pkey.len; 1086 *protkeytype = pkey.type; 1087 return 0; 1088 } else { 1089 DEBUG_ERR("%s unknown/unsupported blob type %d\n", 1090 __func__, hdr->type); 1091 return -EINVAL; 1092 } 1093 1094 /* simple try all apqns from the list */ 1095 for (rc = -ENODEV, i = 0; rc && i < nr_apqns; i++) { 1096 card = apqns[i].card; 1097 dom = apqns[i].domain; 1098 if (hdr->type == TOKTYPE_NON_CCA && 1099 (hdr->version == TOKVER_EP11_AES_WITH_HEADER || 1100 hdr->version == TOKVER_EP11_ECC_WITH_HEADER) && 1101 is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) 1102 rc = ep11_kblob2protkey(card, dom, key, hdr->len, 1103 protkey, protkeylen, protkeytype); 1104 else if (hdr->type == TOKTYPE_NON_CCA && 1105 hdr->version == TOKVER_EP11_AES && 1106 is_ep11_keyblob(key)) 1107 rc = ep11_kblob2protkey(card, dom, key, hdr->len, 1108 protkey, protkeylen, protkeytype); 1109 else if (hdr->type == TOKTYPE_CCA_INTERNAL && 1110 hdr->version == TOKVER_CCA_AES) 1111 rc = cca_sec2protkey(card, dom, key, protkey, 1112 protkeylen, protkeytype); 1113 else if (hdr->type == TOKTYPE_CCA_INTERNAL && 1114 hdr->version == TOKVER_CCA_VLSC) 1115 rc = cca_cipher2protkey(card, dom, key, protkey, 1116 protkeylen, protkeytype); 1117 else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) 1118 rc = cca_ecc2protkey(card, dom, key, protkey, 1119 protkeylen, protkeytype); 1120 else 1121 return -EINVAL; 1122 } 1123 1124 return rc; 1125 } 1126 1127 /* 1128 * File io functions 1129 */ 1130 1131 static void *_copy_key_from_user(void __user *ukey, size_t keylen) 1132 { 1133 if (!ukey || keylen < MINKEYBLOBSIZE || keylen > KEYBLOBBUFSIZE) 1134 return ERR_PTR(-EINVAL); 1135 1136 return memdup_user(ukey, keylen); 1137 } 1138 1139 static void *_copy_apqns_from_user(void __user *uapqns, size_t nr_apqns) 1140 { 1141 if (!uapqns || nr_apqns == 0) 1142 return NULL; 1143 1144 return memdup_user(uapqns, nr_apqns * sizeof(struct pkey_apqn)); 1145 } 1146 1147 static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, 1148 unsigned long arg) 1149 { 1150 int rc; 1151 1152 switch (cmd) { 1153 case PKEY_GENSECK: { 1154 struct pkey_genseck __user *ugs = (void __user *)arg; 1155 struct pkey_genseck kgs; 1156 1157 if (copy_from_user(&kgs, ugs, sizeof(kgs))) 1158 return -EFAULT; 1159 rc = cca_genseckey(kgs.cardnr, kgs.domain, 1160 kgs.keytype, kgs.seckey.seckey); 1161 DEBUG_DBG("%s cca_genseckey()=%d\n", __func__, rc); 1162 if (rc) 1163 break; 1164 if (copy_to_user(ugs, &kgs, sizeof(kgs))) 1165 return -EFAULT; 1166 break; 1167 } 1168 case PKEY_CLR2SECK: { 1169 struct pkey_clr2seck __user *ucs = (void __user *)arg; 1170 struct pkey_clr2seck kcs; 1171 1172 if (copy_from_user(&kcs, ucs, sizeof(kcs))) 1173 return -EFAULT; 1174 rc = cca_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype, 1175 kcs.clrkey.clrkey, kcs.seckey.seckey); 1176 DEBUG_DBG("%s cca_clr2seckey()=%d\n", __func__, rc); 1177 if (rc) 1178 break; 1179 if (copy_to_user(ucs, &kcs, sizeof(kcs))) 1180 return -EFAULT; 1181 memzero_explicit(&kcs, sizeof(kcs)); 1182 break; 1183 } 1184 case PKEY_SEC2PROTK: { 1185 struct pkey_sec2protk __user *usp = (void __user *)arg; 1186 struct pkey_sec2protk ksp; 1187 1188 if (copy_from_user(&ksp, usp, sizeof(ksp))) 1189 return -EFAULT; 1190 rc = cca_sec2protkey(ksp.cardnr, ksp.domain, 1191 ksp.seckey.seckey, ksp.protkey.protkey, 1192 &ksp.protkey.len, &ksp.protkey.type); 1193 DEBUG_DBG("%s cca_sec2protkey()=%d\n", __func__, rc); 1194 if (rc) 1195 break; 1196 if (copy_to_user(usp, &ksp, sizeof(ksp))) 1197 return -EFAULT; 1198 break; 1199 } 1200 case PKEY_CLR2PROTK: { 1201 struct pkey_clr2protk __user *ucp = (void __user *)arg; 1202 struct pkey_clr2protk kcp; 1203 1204 if (copy_from_user(&kcp, ucp, sizeof(kcp))) 1205 return -EFAULT; 1206 rc = pkey_clr2protkey(kcp.keytype, 1207 &kcp.clrkey, &kcp.protkey); 1208 DEBUG_DBG("%s pkey_clr2protkey()=%d\n", __func__, rc); 1209 if (rc) 1210 break; 1211 if (copy_to_user(ucp, &kcp, sizeof(kcp))) 1212 return -EFAULT; 1213 memzero_explicit(&kcp, sizeof(kcp)); 1214 break; 1215 } 1216 case PKEY_FINDCARD: { 1217 struct pkey_findcard __user *ufc = (void __user *)arg; 1218 struct pkey_findcard kfc; 1219 1220 if (copy_from_user(&kfc, ufc, sizeof(kfc))) 1221 return -EFAULT; 1222 rc = cca_findcard(kfc.seckey.seckey, 1223 &kfc.cardnr, &kfc.domain, 1); 1224 DEBUG_DBG("%s cca_findcard()=%d\n", __func__, rc); 1225 if (rc < 0) 1226 break; 1227 if (copy_to_user(ufc, &kfc, sizeof(kfc))) 1228 return -EFAULT; 1229 break; 1230 } 1231 case PKEY_SKEY2PKEY: { 1232 struct pkey_skey2pkey __user *usp = (void __user *)arg; 1233 struct pkey_skey2pkey ksp; 1234 1235 if (copy_from_user(&ksp, usp, sizeof(ksp))) 1236 return -EFAULT; 1237 rc = pkey_skey2pkey(ksp.seckey.seckey, &ksp.protkey); 1238 DEBUG_DBG("%s pkey_skey2pkey()=%d\n", __func__, rc); 1239 if (rc) 1240 break; 1241 if (copy_to_user(usp, &ksp, sizeof(ksp))) 1242 return -EFAULT; 1243 break; 1244 } 1245 case PKEY_VERIFYKEY: { 1246 struct pkey_verifykey __user *uvk = (void __user *)arg; 1247 struct pkey_verifykey kvk; 1248 1249 if (copy_from_user(&kvk, uvk, sizeof(kvk))) 1250 return -EFAULT; 1251 rc = pkey_verifykey(&kvk.seckey, &kvk.cardnr, &kvk.domain, 1252 &kvk.keysize, &kvk.attributes); 1253 DEBUG_DBG("%s pkey_verifykey()=%d\n", __func__, rc); 1254 if (rc) 1255 break; 1256 if (copy_to_user(uvk, &kvk, sizeof(kvk))) 1257 return -EFAULT; 1258 break; 1259 } 1260 case PKEY_GENPROTK: { 1261 struct pkey_genprotk __user *ugp = (void __user *)arg; 1262 struct pkey_genprotk kgp; 1263 1264 if (copy_from_user(&kgp, ugp, sizeof(kgp))) 1265 return -EFAULT; 1266 rc = pkey_genprotkey(kgp.keytype, &kgp.protkey); 1267 DEBUG_DBG("%s pkey_genprotkey()=%d\n", __func__, rc); 1268 if (rc) 1269 break; 1270 if (copy_to_user(ugp, &kgp, sizeof(kgp))) 1271 return -EFAULT; 1272 break; 1273 } 1274 case PKEY_VERIFYPROTK: { 1275 struct pkey_verifyprotk __user *uvp = (void __user *)arg; 1276 struct pkey_verifyprotk kvp; 1277 1278 if (copy_from_user(&kvp, uvp, sizeof(kvp))) 1279 return -EFAULT; 1280 rc = pkey_verifyprotkey(&kvp.protkey); 1281 DEBUG_DBG("%s pkey_verifyprotkey()=%d\n", __func__, rc); 1282 break; 1283 } 1284 case PKEY_KBLOB2PROTK: { 1285 struct pkey_kblob2pkey __user *utp = (void __user *)arg; 1286 struct pkey_kblob2pkey ktp; 1287 u8 *kkey; 1288 1289 if (copy_from_user(&ktp, utp, sizeof(ktp))) 1290 return -EFAULT; 1291 kkey = _copy_key_from_user(ktp.key, ktp.keylen); 1292 if (IS_ERR(kkey)) 1293 return PTR_ERR(kkey); 1294 rc = pkey_keyblob2pkey(kkey, ktp.keylen, &ktp.protkey); 1295 DEBUG_DBG("%s pkey_keyblob2pkey()=%d\n", __func__, rc); 1296 kfree(kkey); 1297 if (rc) 1298 break; 1299 if (copy_to_user(utp, &ktp, sizeof(ktp))) 1300 return -EFAULT; 1301 break; 1302 } 1303 case PKEY_GENSECK2: { 1304 struct pkey_genseck2 __user *ugs = (void __user *)arg; 1305 struct pkey_genseck2 kgs; 1306 struct pkey_apqn *apqns; 1307 size_t klen = KEYBLOBBUFSIZE; 1308 u8 *kkey; 1309 1310 if (copy_from_user(&kgs, ugs, sizeof(kgs))) 1311 return -EFAULT; 1312 apqns = _copy_apqns_from_user(kgs.apqns, kgs.apqn_entries); 1313 if (IS_ERR(apqns)) 1314 return PTR_ERR(apqns); 1315 kkey = kmalloc(klen, GFP_KERNEL); 1316 if (!kkey) { 1317 kfree(apqns); 1318 return -ENOMEM; 1319 } 1320 rc = pkey_genseckey2(apqns, kgs.apqn_entries, 1321 kgs.type, kgs.size, kgs.keygenflags, 1322 kkey, &klen); 1323 DEBUG_DBG("%s pkey_genseckey2()=%d\n", __func__, rc); 1324 kfree(apqns); 1325 if (rc) { 1326 kfree(kkey); 1327 break; 1328 } 1329 if (kgs.key) { 1330 if (kgs.keylen < klen) { 1331 kfree(kkey); 1332 return -EINVAL; 1333 } 1334 if (copy_to_user(kgs.key, kkey, klen)) { 1335 kfree(kkey); 1336 return -EFAULT; 1337 } 1338 } 1339 kgs.keylen = klen; 1340 if (copy_to_user(ugs, &kgs, sizeof(kgs))) 1341 rc = -EFAULT; 1342 kfree(kkey); 1343 break; 1344 } 1345 case PKEY_CLR2SECK2: { 1346 struct pkey_clr2seck2 __user *ucs = (void __user *)arg; 1347 struct pkey_clr2seck2 kcs; 1348 struct pkey_apqn *apqns; 1349 size_t klen = KEYBLOBBUFSIZE; 1350 u8 *kkey; 1351 1352 if (copy_from_user(&kcs, ucs, sizeof(kcs))) 1353 return -EFAULT; 1354 apqns = _copy_apqns_from_user(kcs.apqns, kcs.apqn_entries); 1355 if (IS_ERR(apqns)) 1356 return PTR_ERR(apqns); 1357 kkey = kmalloc(klen, GFP_KERNEL); 1358 if (!kkey) { 1359 kfree(apqns); 1360 return -ENOMEM; 1361 } 1362 rc = pkey_clr2seckey2(apqns, kcs.apqn_entries, 1363 kcs.type, kcs.size, kcs.keygenflags, 1364 kcs.clrkey.clrkey, kkey, &klen); 1365 DEBUG_DBG("%s pkey_clr2seckey2()=%d\n", __func__, rc); 1366 kfree(apqns); 1367 if (rc) { 1368 kfree(kkey); 1369 break; 1370 } 1371 if (kcs.key) { 1372 if (kcs.keylen < klen) { 1373 kfree(kkey); 1374 return -EINVAL; 1375 } 1376 if (copy_to_user(kcs.key, kkey, klen)) { 1377 kfree(kkey); 1378 return -EFAULT; 1379 } 1380 } 1381 kcs.keylen = klen; 1382 if (copy_to_user(ucs, &kcs, sizeof(kcs))) 1383 rc = -EFAULT; 1384 memzero_explicit(&kcs, sizeof(kcs)); 1385 kfree(kkey); 1386 break; 1387 } 1388 case PKEY_VERIFYKEY2: { 1389 struct pkey_verifykey2 __user *uvk = (void __user *)arg; 1390 struct pkey_verifykey2 kvk; 1391 u8 *kkey; 1392 1393 if (copy_from_user(&kvk, uvk, sizeof(kvk))) 1394 return -EFAULT; 1395 kkey = _copy_key_from_user(kvk.key, kvk.keylen); 1396 if (IS_ERR(kkey)) 1397 return PTR_ERR(kkey); 1398 rc = pkey_verifykey2(kkey, kvk.keylen, 1399 &kvk.cardnr, &kvk.domain, 1400 &kvk.type, &kvk.size, &kvk.flags); 1401 DEBUG_DBG("%s pkey_verifykey2()=%d\n", __func__, rc); 1402 kfree(kkey); 1403 if (rc) 1404 break; 1405 if (copy_to_user(uvk, &kvk, sizeof(kvk))) 1406 return -EFAULT; 1407 break; 1408 } 1409 case PKEY_KBLOB2PROTK2: { 1410 struct pkey_kblob2pkey2 __user *utp = (void __user *)arg; 1411 struct pkey_kblob2pkey2 ktp; 1412 struct pkey_apqn *apqns = NULL; 1413 u8 *kkey; 1414 1415 if (copy_from_user(&ktp, utp, sizeof(ktp))) 1416 return -EFAULT; 1417 apqns = _copy_apqns_from_user(ktp.apqns, ktp.apqn_entries); 1418 if (IS_ERR(apqns)) 1419 return PTR_ERR(apqns); 1420 kkey = _copy_key_from_user(ktp.key, ktp.keylen); 1421 if (IS_ERR(kkey)) { 1422 kfree(apqns); 1423 return PTR_ERR(kkey); 1424 } 1425 rc = pkey_keyblob2pkey2(apqns, ktp.apqn_entries, 1426 kkey, ktp.keylen, &ktp.protkey); 1427 DEBUG_DBG("%s pkey_keyblob2pkey2()=%d\n", __func__, rc); 1428 kfree(apqns); 1429 kfree(kkey); 1430 if (rc) 1431 break; 1432 if (copy_to_user(utp, &ktp, sizeof(ktp))) 1433 return -EFAULT; 1434 break; 1435 } 1436 case PKEY_APQNS4K: { 1437 struct pkey_apqns4key __user *uak = (void __user *)arg; 1438 struct pkey_apqns4key kak; 1439 struct pkey_apqn *apqns = NULL; 1440 size_t nr_apqns, len; 1441 u8 *kkey; 1442 1443 if (copy_from_user(&kak, uak, sizeof(kak))) 1444 return -EFAULT; 1445 nr_apqns = kak.apqn_entries; 1446 if (nr_apqns) { 1447 apqns = kmalloc_array(nr_apqns, 1448 sizeof(struct pkey_apqn), 1449 GFP_KERNEL); 1450 if (!apqns) 1451 return -ENOMEM; 1452 } 1453 kkey = _copy_key_from_user(kak.key, kak.keylen); 1454 if (IS_ERR(kkey)) { 1455 kfree(apqns); 1456 return PTR_ERR(kkey); 1457 } 1458 rc = pkey_apqns4key(kkey, kak.keylen, kak.flags, 1459 apqns, &nr_apqns); 1460 DEBUG_DBG("%s pkey_apqns4key()=%d\n", __func__, rc); 1461 kfree(kkey); 1462 if (rc && rc != -ENOSPC) { 1463 kfree(apqns); 1464 break; 1465 } 1466 if (!rc && kak.apqns) { 1467 if (nr_apqns > kak.apqn_entries) { 1468 kfree(apqns); 1469 return -EINVAL; 1470 } 1471 len = nr_apqns * sizeof(struct pkey_apqn); 1472 if (len) { 1473 if (copy_to_user(kak.apqns, apqns, len)) { 1474 kfree(apqns); 1475 return -EFAULT; 1476 } 1477 } 1478 } 1479 kak.apqn_entries = nr_apqns; 1480 if (copy_to_user(uak, &kak, sizeof(kak))) 1481 rc = -EFAULT; 1482 kfree(apqns); 1483 break; 1484 } 1485 case PKEY_APQNS4KT: { 1486 struct pkey_apqns4keytype __user *uat = (void __user *)arg; 1487 struct pkey_apqns4keytype kat; 1488 struct pkey_apqn *apqns = NULL; 1489 size_t nr_apqns, len; 1490 1491 if (copy_from_user(&kat, uat, sizeof(kat))) 1492 return -EFAULT; 1493 nr_apqns = kat.apqn_entries; 1494 if (nr_apqns) { 1495 apqns = kmalloc_array(nr_apqns, 1496 sizeof(struct pkey_apqn), 1497 GFP_KERNEL); 1498 if (!apqns) 1499 return -ENOMEM; 1500 } 1501 rc = pkey_apqns4keytype(kat.type, kat.cur_mkvp, kat.alt_mkvp, 1502 kat.flags, apqns, &nr_apqns); 1503 DEBUG_DBG("%s pkey_apqns4keytype()=%d\n", __func__, rc); 1504 if (rc && rc != -ENOSPC) { 1505 kfree(apqns); 1506 break; 1507 } 1508 if (!rc && kat.apqns) { 1509 if (nr_apqns > kat.apqn_entries) { 1510 kfree(apqns); 1511 return -EINVAL; 1512 } 1513 len = nr_apqns * sizeof(struct pkey_apqn); 1514 if (len) { 1515 if (copy_to_user(kat.apqns, apqns, len)) { 1516 kfree(apqns); 1517 return -EFAULT; 1518 } 1519 } 1520 } 1521 kat.apqn_entries = nr_apqns; 1522 if (copy_to_user(uat, &kat, sizeof(kat))) 1523 rc = -EFAULT; 1524 kfree(apqns); 1525 break; 1526 } 1527 case PKEY_KBLOB2PROTK3: { 1528 struct pkey_kblob2pkey3 __user *utp = (void __user *)arg; 1529 struct pkey_kblob2pkey3 ktp; 1530 struct pkey_apqn *apqns = NULL; 1531 u32 protkeylen = PROTKEYBLOBBUFSIZE; 1532 u8 *kkey, *protkey; 1533 1534 if (copy_from_user(&ktp, utp, sizeof(ktp))) 1535 return -EFAULT; 1536 apqns = _copy_apqns_from_user(ktp.apqns, ktp.apqn_entries); 1537 if (IS_ERR(apqns)) 1538 return PTR_ERR(apqns); 1539 kkey = _copy_key_from_user(ktp.key, ktp.keylen); 1540 if (IS_ERR(kkey)) { 1541 kfree(apqns); 1542 return PTR_ERR(kkey); 1543 } 1544 protkey = kmalloc(protkeylen, GFP_KERNEL); 1545 if (!protkey) { 1546 kfree(apqns); 1547 kfree(kkey); 1548 return -ENOMEM; 1549 } 1550 rc = pkey_keyblob2pkey3(apqns, ktp.apqn_entries, kkey, 1551 ktp.keylen, &ktp.pkeytype, 1552 protkey, &protkeylen); 1553 DEBUG_DBG("%s pkey_keyblob2pkey3()=%d\n", __func__, rc); 1554 kfree(apqns); 1555 kfree(kkey); 1556 if (rc) { 1557 kfree(protkey); 1558 break; 1559 } 1560 if (ktp.pkey && ktp.pkeylen) { 1561 if (protkeylen > ktp.pkeylen) { 1562 kfree(protkey); 1563 return -EINVAL; 1564 } 1565 if (copy_to_user(ktp.pkey, protkey, protkeylen)) { 1566 kfree(protkey); 1567 return -EFAULT; 1568 } 1569 } 1570 kfree(protkey); 1571 ktp.pkeylen = protkeylen; 1572 if (copy_to_user(utp, &ktp, sizeof(ktp))) 1573 return -EFAULT; 1574 break; 1575 } 1576 default: 1577 /* unknown/unsupported ioctl cmd */ 1578 return -ENOTTY; 1579 } 1580 1581 return rc; 1582 } 1583 1584 /* 1585 * Sysfs and file io operations 1586 */ 1587 1588 /* 1589 * Sysfs attribute read function for all protected key binary attributes. 1590 * The implementation can not deal with partial reads, because a new random 1591 * protected key blob is generated with each read. In case of partial reads 1592 * (i.e. off != 0 or count < key blob size) -EINVAL is returned. 1593 */ 1594 static ssize_t pkey_protkey_aes_attr_read(u32 keytype, bool is_xts, char *buf, 1595 loff_t off, size_t count) 1596 { 1597 struct protaeskeytoken protkeytoken; 1598 struct pkey_protkey protkey; 1599 int rc; 1600 1601 if (off != 0 || count < sizeof(protkeytoken)) 1602 return -EINVAL; 1603 if (is_xts) 1604 if (count < 2 * sizeof(protkeytoken)) 1605 return -EINVAL; 1606 1607 memset(&protkeytoken, 0, sizeof(protkeytoken)); 1608 protkeytoken.type = TOKTYPE_NON_CCA; 1609 protkeytoken.version = TOKVER_PROTECTED_KEY; 1610 protkeytoken.keytype = keytype; 1611 1612 rc = pkey_genprotkey(protkeytoken.keytype, &protkey); 1613 if (rc) 1614 return rc; 1615 1616 protkeytoken.len = protkey.len; 1617 memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len); 1618 1619 memcpy(buf, &protkeytoken, sizeof(protkeytoken)); 1620 1621 if (is_xts) { 1622 rc = pkey_genprotkey(protkeytoken.keytype, &protkey); 1623 if (rc) 1624 return rc; 1625 1626 protkeytoken.len = protkey.len; 1627 memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len); 1628 1629 memcpy(buf + sizeof(protkeytoken), &protkeytoken, 1630 sizeof(protkeytoken)); 1631 1632 return 2 * sizeof(protkeytoken); 1633 } 1634 1635 return sizeof(protkeytoken); 1636 } 1637 1638 static ssize_t protkey_aes_128_read(struct file *filp, 1639 struct kobject *kobj, 1640 struct bin_attribute *attr, 1641 char *buf, loff_t off, 1642 size_t count) 1643 { 1644 return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf, 1645 off, count); 1646 } 1647 1648 static ssize_t protkey_aes_192_read(struct file *filp, 1649 struct kobject *kobj, 1650 struct bin_attribute *attr, 1651 char *buf, loff_t off, 1652 size_t count) 1653 { 1654 return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf, 1655 off, count); 1656 } 1657 1658 static ssize_t protkey_aes_256_read(struct file *filp, 1659 struct kobject *kobj, 1660 struct bin_attribute *attr, 1661 char *buf, loff_t off, 1662 size_t count) 1663 { 1664 return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf, 1665 off, count); 1666 } 1667 1668 static ssize_t protkey_aes_128_xts_read(struct file *filp, 1669 struct kobject *kobj, 1670 struct bin_attribute *attr, 1671 char *buf, loff_t off, 1672 size_t count) 1673 { 1674 return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf, 1675 off, count); 1676 } 1677 1678 static ssize_t protkey_aes_256_xts_read(struct file *filp, 1679 struct kobject *kobj, 1680 struct bin_attribute *attr, 1681 char *buf, loff_t off, 1682 size_t count) 1683 { 1684 return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf, 1685 off, count); 1686 } 1687 1688 static BIN_ATTR_RO(protkey_aes_128, sizeof(struct protaeskeytoken)); 1689 static BIN_ATTR_RO(protkey_aes_192, sizeof(struct protaeskeytoken)); 1690 static BIN_ATTR_RO(protkey_aes_256, sizeof(struct protaeskeytoken)); 1691 static BIN_ATTR_RO(protkey_aes_128_xts, 2 * sizeof(struct protaeskeytoken)); 1692 static BIN_ATTR_RO(protkey_aes_256_xts, 2 * sizeof(struct protaeskeytoken)); 1693 1694 static struct bin_attribute *protkey_attrs[] = { 1695 &bin_attr_protkey_aes_128, 1696 &bin_attr_protkey_aes_192, 1697 &bin_attr_protkey_aes_256, 1698 &bin_attr_protkey_aes_128_xts, 1699 &bin_attr_protkey_aes_256_xts, 1700 NULL 1701 }; 1702 1703 static struct attribute_group protkey_attr_group = { 1704 .name = "protkey", 1705 .bin_attrs = protkey_attrs, 1706 }; 1707 1708 /* 1709 * Sysfs attribute read function for all secure key ccadata binary attributes. 1710 * The implementation can not deal with partial reads, because a new random 1711 * protected key blob is generated with each read. In case of partial reads 1712 * (i.e. off != 0 or count < key blob size) -EINVAL is returned. 1713 */ 1714 static ssize_t pkey_ccadata_aes_attr_read(u32 keytype, bool is_xts, char *buf, 1715 loff_t off, size_t count) 1716 { 1717 int rc; 1718 struct pkey_seckey *seckey = (struct pkey_seckey *)buf; 1719 1720 if (off != 0 || count < sizeof(struct secaeskeytoken)) 1721 return -EINVAL; 1722 if (is_xts) 1723 if (count < 2 * sizeof(struct secaeskeytoken)) 1724 return -EINVAL; 1725 1726 rc = cca_genseckey(-1, -1, keytype, seckey->seckey); 1727 if (rc) 1728 return rc; 1729 1730 if (is_xts) { 1731 seckey++; 1732 rc = cca_genseckey(-1, -1, keytype, seckey->seckey); 1733 if (rc) 1734 return rc; 1735 1736 return 2 * sizeof(struct secaeskeytoken); 1737 } 1738 1739 return sizeof(struct secaeskeytoken); 1740 } 1741 1742 static ssize_t ccadata_aes_128_read(struct file *filp, 1743 struct kobject *kobj, 1744 struct bin_attribute *attr, 1745 char *buf, loff_t off, 1746 size_t count) 1747 { 1748 return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf, 1749 off, count); 1750 } 1751 1752 static ssize_t ccadata_aes_192_read(struct file *filp, 1753 struct kobject *kobj, 1754 struct bin_attribute *attr, 1755 char *buf, loff_t off, 1756 size_t count) 1757 { 1758 return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf, 1759 off, count); 1760 } 1761 1762 static ssize_t ccadata_aes_256_read(struct file *filp, 1763 struct kobject *kobj, 1764 struct bin_attribute *attr, 1765 char *buf, loff_t off, 1766 size_t count) 1767 { 1768 return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf, 1769 off, count); 1770 } 1771 1772 static ssize_t ccadata_aes_128_xts_read(struct file *filp, 1773 struct kobject *kobj, 1774 struct bin_attribute *attr, 1775 char *buf, loff_t off, 1776 size_t count) 1777 { 1778 return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf, 1779 off, count); 1780 } 1781 1782 static ssize_t ccadata_aes_256_xts_read(struct file *filp, 1783 struct kobject *kobj, 1784 struct bin_attribute *attr, 1785 char *buf, loff_t off, 1786 size_t count) 1787 { 1788 return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf, 1789 off, count); 1790 } 1791 1792 static BIN_ATTR_RO(ccadata_aes_128, sizeof(struct secaeskeytoken)); 1793 static BIN_ATTR_RO(ccadata_aes_192, sizeof(struct secaeskeytoken)); 1794 static BIN_ATTR_RO(ccadata_aes_256, sizeof(struct secaeskeytoken)); 1795 static BIN_ATTR_RO(ccadata_aes_128_xts, 2 * sizeof(struct secaeskeytoken)); 1796 static BIN_ATTR_RO(ccadata_aes_256_xts, 2 * sizeof(struct secaeskeytoken)); 1797 1798 static struct bin_attribute *ccadata_attrs[] = { 1799 &bin_attr_ccadata_aes_128, 1800 &bin_attr_ccadata_aes_192, 1801 &bin_attr_ccadata_aes_256, 1802 &bin_attr_ccadata_aes_128_xts, 1803 &bin_attr_ccadata_aes_256_xts, 1804 NULL 1805 }; 1806 1807 static struct attribute_group ccadata_attr_group = { 1808 .name = "ccadata", 1809 .bin_attrs = ccadata_attrs, 1810 }; 1811 1812 #define CCACIPHERTOKENSIZE (sizeof(struct cipherkeytoken) + 80) 1813 1814 /* 1815 * Sysfs attribute read function for all secure key ccacipher binary attributes. 1816 * The implementation can not deal with partial reads, because a new random 1817 * secure key blob is generated with each read. In case of partial reads 1818 * (i.e. off != 0 or count < key blob size) -EINVAL is returned. 1819 */ 1820 static ssize_t pkey_ccacipher_aes_attr_read(enum pkey_key_size keybits, 1821 bool is_xts, char *buf, loff_t off, 1822 size_t count) 1823 { 1824 int i, rc, card, dom; 1825 u32 nr_apqns, *apqns = NULL; 1826 size_t keysize = CCACIPHERTOKENSIZE; 1827 1828 if (off != 0 || count < CCACIPHERTOKENSIZE) 1829 return -EINVAL; 1830 if (is_xts) 1831 if (count < 2 * CCACIPHERTOKENSIZE) 1832 return -EINVAL; 1833 1834 /* build a list of apqns able to generate an cipher key */ 1835 rc = cca_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF, 1836 ZCRYPT_CEX6, 0, 0, 0, 0); 1837 if (rc) 1838 return rc; 1839 1840 memset(buf, 0, is_xts ? 2 * keysize : keysize); 1841 1842 /* simple try all apqns from the list */ 1843 for (i = 0, rc = -ENODEV; i < nr_apqns; i++) { 1844 card = apqns[i] >> 16; 1845 dom = apqns[i] & 0xFFFF; 1846 rc = cca_gencipherkey(card, dom, keybits, 0, buf, &keysize); 1847 if (rc == 0) 1848 break; 1849 } 1850 if (rc) 1851 return rc; 1852 1853 if (is_xts) { 1854 keysize = CCACIPHERTOKENSIZE; 1855 buf += CCACIPHERTOKENSIZE; 1856 rc = cca_gencipherkey(card, dom, keybits, 0, buf, &keysize); 1857 if (rc == 0) 1858 return 2 * CCACIPHERTOKENSIZE; 1859 } 1860 1861 return CCACIPHERTOKENSIZE; 1862 } 1863 1864 static ssize_t ccacipher_aes_128_read(struct file *filp, 1865 struct kobject *kobj, 1866 struct bin_attribute *attr, 1867 char *buf, loff_t off, 1868 size_t count) 1869 { 1870 return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_128, false, buf, 1871 off, count); 1872 } 1873 1874 static ssize_t ccacipher_aes_192_read(struct file *filp, 1875 struct kobject *kobj, 1876 struct bin_attribute *attr, 1877 char *buf, loff_t off, 1878 size_t count) 1879 { 1880 return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_192, false, buf, 1881 off, count); 1882 } 1883 1884 static ssize_t ccacipher_aes_256_read(struct file *filp, 1885 struct kobject *kobj, 1886 struct bin_attribute *attr, 1887 char *buf, loff_t off, 1888 size_t count) 1889 { 1890 return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_256, false, buf, 1891 off, count); 1892 } 1893 1894 static ssize_t ccacipher_aes_128_xts_read(struct file *filp, 1895 struct kobject *kobj, 1896 struct bin_attribute *attr, 1897 char *buf, loff_t off, 1898 size_t count) 1899 { 1900 return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_128, true, buf, 1901 off, count); 1902 } 1903 1904 static ssize_t ccacipher_aes_256_xts_read(struct file *filp, 1905 struct kobject *kobj, 1906 struct bin_attribute *attr, 1907 char *buf, loff_t off, 1908 size_t count) 1909 { 1910 return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_256, true, buf, 1911 off, count); 1912 } 1913 1914 static BIN_ATTR_RO(ccacipher_aes_128, CCACIPHERTOKENSIZE); 1915 static BIN_ATTR_RO(ccacipher_aes_192, CCACIPHERTOKENSIZE); 1916 static BIN_ATTR_RO(ccacipher_aes_256, CCACIPHERTOKENSIZE); 1917 static BIN_ATTR_RO(ccacipher_aes_128_xts, 2 * CCACIPHERTOKENSIZE); 1918 static BIN_ATTR_RO(ccacipher_aes_256_xts, 2 * CCACIPHERTOKENSIZE); 1919 1920 static struct bin_attribute *ccacipher_attrs[] = { 1921 &bin_attr_ccacipher_aes_128, 1922 &bin_attr_ccacipher_aes_192, 1923 &bin_attr_ccacipher_aes_256, 1924 &bin_attr_ccacipher_aes_128_xts, 1925 &bin_attr_ccacipher_aes_256_xts, 1926 NULL 1927 }; 1928 1929 static struct attribute_group ccacipher_attr_group = { 1930 .name = "ccacipher", 1931 .bin_attrs = ccacipher_attrs, 1932 }; 1933 1934 /* 1935 * Sysfs attribute read function for all ep11 aes key binary attributes. 1936 * The implementation can not deal with partial reads, because a new random 1937 * secure key blob is generated with each read. In case of partial reads 1938 * (i.e. off != 0 or count < key blob size) -EINVAL is returned. 1939 * This function and the sysfs attributes using it provide EP11 key blobs 1940 * padded to the upper limit of MAXEP11AESKEYBLOBSIZE which is currently 1941 * 320 bytes. 1942 */ 1943 static ssize_t pkey_ep11_aes_attr_read(enum pkey_key_size keybits, 1944 bool is_xts, char *buf, loff_t off, 1945 size_t count) 1946 { 1947 int i, rc, card, dom; 1948 u32 nr_apqns, *apqns = NULL; 1949 size_t keysize = MAXEP11AESKEYBLOBSIZE; 1950 1951 if (off != 0 || count < MAXEP11AESKEYBLOBSIZE) 1952 return -EINVAL; 1953 if (is_xts) 1954 if (count < 2 * MAXEP11AESKEYBLOBSIZE) 1955 return -EINVAL; 1956 1957 /* build a list of apqns able to generate an cipher key */ 1958 rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF, 1959 ZCRYPT_CEX7, EP11_API_V, NULL); 1960 if (rc) 1961 return rc; 1962 1963 memset(buf, 0, is_xts ? 2 * keysize : keysize); 1964 1965 /* simple try all apqns from the list */ 1966 for (i = 0, rc = -ENODEV; i < nr_apqns; i++) { 1967 card = apqns[i] >> 16; 1968 dom = apqns[i] & 0xFFFF; 1969 rc = ep11_genaeskey(card, dom, keybits, 0, buf, &keysize); 1970 if (rc == 0) 1971 break; 1972 } 1973 if (rc) 1974 return rc; 1975 1976 if (is_xts) { 1977 keysize = MAXEP11AESKEYBLOBSIZE; 1978 buf += MAXEP11AESKEYBLOBSIZE; 1979 rc = ep11_genaeskey(card, dom, keybits, 0, buf, &keysize); 1980 if (rc == 0) 1981 return 2 * MAXEP11AESKEYBLOBSIZE; 1982 } 1983 1984 return MAXEP11AESKEYBLOBSIZE; 1985 } 1986 1987 static ssize_t ep11_aes_128_read(struct file *filp, 1988 struct kobject *kobj, 1989 struct bin_attribute *attr, 1990 char *buf, loff_t off, 1991 size_t count) 1992 { 1993 return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_128, false, buf, 1994 off, count); 1995 } 1996 1997 static ssize_t ep11_aes_192_read(struct file *filp, 1998 struct kobject *kobj, 1999 struct bin_attribute *attr, 2000 char *buf, loff_t off, 2001 size_t count) 2002 { 2003 return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_192, false, buf, 2004 off, count); 2005 } 2006 2007 static ssize_t ep11_aes_256_read(struct file *filp, 2008 struct kobject *kobj, 2009 struct bin_attribute *attr, 2010 char *buf, loff_t off, 2011 size_t count) 2012 { 2013 return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_256, false, buf, 2014 off, count); 2015 } 2016 2017 static ssize_t ep11_aes_128_xts_read(struct file *filp, 2018 struct kobject *kobj, 2019 struct bin_attribute *attr, 2020 char *buf, loff_t off, 2021 size_t count) 2022 { 2023 return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_128, true, buf, 2024 off, count); 2025 } 2026 2027 static ssize_t ep11_aes_256_xts_read(struct file *filp, 2028 struct kobject *kobj, 2029 struct bin_attribute *attr, 2030 char *buf, loff_t off, 2031 size_t count) 2032 { 2033 return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_256, true, buf, 2034 off, count); 2035 } 2036 2037 static BIN_ATTR_RO(ep11_aes_128, MAXEP11AESKEYBLOBSIZE); 2038 static BIN_ATTR_RO(ep11_aes_192, MAXEP11AESKEYBLOBSIZE); 2039 static BIN_ATTR_RO(ep11_aes_256, MAXEP11AESKEYBLOBSIZE); 2040 static BIN_ATTR_RO(ep11_aes_128_xts, 2 * MAXEP11AESKEYBLOBSIZE); 2041 static BIN_ATTR_RO(ep11_aes_256_xts, 2 * MAXEP11AESKEYBLOBSIZE); 2042 2043 static struct bin_attribute *ep11_attrs[] = { 2044 &bin_attr_ep11_aes_128, 2045 &bin_attr_ep11_aes_192, 2046 &bin_attr_ep11_aes_256, 2047 &bin_attr_ep11_aes_128_xts, 2048 &bin_attr_ep11_aes_256_xts, 2049 NULL 2050 }; 2051 2052 static struct attribute_group ep11_attr_group = { 2053 .name = "ep11", 2054 .bin_attrs = ep11_attrs, 2055 }; 2056 2057 static const struct attribute_group *pkey_attr_groups[] = { 2058 &protkey_attr_group, 2059 &ccadata_attr_group, 2060 &ccacipher_attr_group, 2061 &ep11_attr_group, 2062 NULL, 2063 }; 2064 2065 static const struct file_operations pkey_fops = { 2066 .owner = THIS_MODULE, 2067 .open = nonseekable_open, 2068 .llseek = no_llseek, 2069 .unlocked_ioctl = pkey_unlocked_ioctl, 2070 }; 2071 2072 static struct miscdevice pkey_dev = { 2073 .name = "pkey", 2074 .minor = MISC_DYNAMIC_MINOR, 2075 .mode = 0666, 2076 .fops = &pkey_fops, 2077 .groups = pkey_attr_groups, 2078 }; 2079 2080 /* 2081 * Module init 2082 */ 2083 static int __init pkey_init(void) 2084 { 2085 cpacf_mask_t func_mask; 2086 2087 /* 2088 * The pckmo instruction should be available - even if we don't 2089 * actually invoke it. This instruction comes with MSA 3 which 2090 * is also the minimum level for the kmc instructions which 2091 * are able to work with protected keys. 2092 */ 2093 if (!cpacf_query(CPACF_PCKMO, &func_mask)) 2094 return -ENODEV; 2095 2096 /* check for kmc instructions available */ 2097 if (!cpacf_query(CPACF_KMC, &func_mask)) 2098 return -ENODEV; 2099 if (!cpacf_test_func(&func_mask, CPACF_KMC_PAES_128) || 2100 !cpacf_test_func(&func_mask, CPACF_KMC_PAES_192) || 2101 !cpacf_test_func(&func_mask, CPACF_KMC_PAES_256)) 2102 return -ENODEV; 2103 2104 pkey_debug_init(); 2105 2106 return misc_register(&pkey_dev); 2107 } 2108 2109 /* 2110 * Module exit 2111 */ 2112 static void __exit pkey_exit(void) 2113 { 2114 misc_deregister(&pkey_dev); 2115 pkey_debug_exit(); 2116 } 2117 2118 module_cpu_feature_match(S390_CPU_FEATURE_MSA, pkey_init); 2119 module_exit(pkey_exit); 2120