drivers/s390/crypto/pkey_api.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  pkey device driver
   4  *
   5  *  Copyright IBM Corp. 2017, 2023
   6  *
   7  *  Author(s): Harald Freudenberger
   8  */
   9
  10 #define KMSG_COMPONENT "pkey"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/fs.h>
  14 #include <linux/init.h>
  15 #include <linux/miscdevice.h>
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/kallsyms.h>
  19 #include <linux/debugfs.h>
  20 #include <linux/random.h>
  21 #include <linux/cpufeature.h>
  22 #include <asm/zcrypt.h>
  23 #include <asm/cpacf.h>
  24 #include <asm/pkey.h>
  25 #include <crypto/aes.h>
  26
  27 #include "zcrypt_api.h"
  28 #include "zcrypt_ccamisc.h"
  29 #include "zcrypt_ep11misc.h"
  30
  31 MODULE_LICENSE("GPL");
  32 MODULE_AUTHOR("IBM Corporation");
  33 MODULE_DESCRIPTION("s390 protected key interface");
  34
  35 #define KEYBLOBBUFSIZE 8192     /* key buffer size used for internal processing */
  36 #define MINKEYBLOBBUFSIZE (sizeof(struct keytoken_header))
  37 #define PROTKEYBLOBBUFSIZE 256  /* protected key buffer size used internal */
  38 #define MAXAPQNSINLIST 64       /* max 64 apqns within a apqn list */
  39 #define AES_WK_VP_SIZE 32       /* Size of WK VP block appended to a prot key */
  40
  41 /*
  42  * debug feature data and functions
  43  */
  44
  45 static debug_info_t *pkey_dbf_info;
  46
  47 #define PKEY_DBF_INFO(...) debug_sprintf_event(pkey_dbf_info, 5, ##__VA_ARGS__)
  48 #define PKEY_DBF_WARN(...) debug_sprintf_event(pkey_dbf_info, 4, ##__VA_ARGS__)
  49 #define PKEY_DBF_ERR(...)  debug_sprintf_event(pkey_dbf_info, 3, ##__VA_ARGS__)
  50
  51 static void __init pkey_debug_init(void)
  52 {
  53         /* 5 arguments per dbf entry (including the format string ptr) */
  54         pkey_dbf_info = debug_register("pkey", 1, 1, 5 * sizeof(long));
  55         debug_register_view(pkey_dbf_info, &debug_sprintf_view);
  56         debug_set_level(pkey_dbf_info, 3);
  57 }
  58
  59 static void __exit pkey_debug_exit(void)
  60 {
  61         debug_unregister(pkey_dbf_info);
  62 }
  63
  64 /* inside view of a protected key token (only type 0x00 version 0x01) */
  65 struct protaeskeytoken {
  66         u8  type;     /* 0x00 for PAES specific key tokens */
  67         u8  res0[3];
  68         u8  version;  /* should be 0x01 for protected AES key token */
  69         u8  res1[3];
  70         u32 keytype;  /* key type, one of the PKEY_KEYTYPE values */
  71         u32 len;      /* bytes actually stored in protkey[] */
  72         u8  protkey[MAXPROTKEYSIZE]; /* the protected key blob */
  73 } __packed;
  74
  75 /* inside view of a clear key token (type 0x00 version 0x02) */
  76 struct clearkeytoken {
  77         u8  type;       /* 0x00 for PAES specific key tokens */
  78         u8  res0[3];
  79         u8  version;    /* 0x02 for clear key token */
  80         u8  res1[3];
  81         u32 keytype;    /* key type, one of the PKEY_KEYTYPE_* values */
  82         u32 len;        /* bytes actually stored in clearkey[] */
  83         u8  clearkey[]; /* clear key value */
  84 } __packed;
  85
  86 /* helper function which translates the PKEY_KEYTYPE_AES_* to their keysize */
  87 static inline u32 pkey_keytype_aes_to_size(u32 keytype)
  88 {
  89         switch (keytype) {
  90         case PKEY_KEYTYPE_AES_128:
  91                 return 16;
  92         case PKEY_KEYTYPE_AES_192:
  93                 return 24;
  94         case PKEY_KEYTYPE_AES_256:
  95                 return 32;
  96         default:
  97                 return 0;
  98         }
  99 }
 100
 101 /*
 102  * Create a protected key from a clear key value via PCKMO instruction.
 103  */
 104 static int pkey_clr2protkey(u32 keytype, const u8 *clrkey,
 105                             u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 106 {
 107         /* mask of available pckmo subfunctions */
 108         static cpacf_mask_t pckmo_functions;
 109
 110         u8 paramblock[112];
 111         u32 pkeytype;
 112         int keysize;
 113         long fc;
 114
 115         switch (keytype) {
 116         case PKEY_KEYTYPE_AES_128:
 117                 /* 16 byte key, 32 byte aes wkvp, total 48 bytes */
 118                 keysize = 16;
 119                 pkeytype = keytype;
 120                 fc = CPACF_PCKMO_ENC_AES_128_KEY;
 121                 break;
 122         case PKEY_KEYTYPE_AES_192:
 123                 /* 24 byte key, 32 byte aes wkvp, total 56 bytes */
 124                 keysize = 24;
 125                 pkeytype = keytype;
 126                 fc = CPACF_PCKMO_ENC_AES_192_KEY;
 127                 break;
 128         case PKEY_KEYTYPE_AES_256:
 129                 /* 32 byte key, 32 byte aes wkvp, total 64 bytes */
 130                 keysize = 32;
 131                 pkeytype = keytype;
 132                 fc = CPACF_PCKMO_ENC_AES_256_KEY;
 133                 break;
 134         case PKEY_KEYTYPE_ECC_P256:
 135                 /* 32 byte key, 32 byte aes wkvp, total 64 bytes */
 136                 keysize = 32;
 137                 pkeytype = PKEY_KEYTYPE_ECC;
 138                 fc = CPACF_PCKMO_ENC_ECC_P256_KEY;
 139                 break;
 140         case PKEY_KEYTYPE_ECC_P384:
 141                 /* 48 byte key, 32 byte aes wkvp, total 80 bytes */
 142                 keysize = 48;
 143                 pkeytype = PKEY_KEYTYPE_ECC;
 144                 fc = CPACF_PCKMO_ENC_ECC_P384_KEY;
 145                 break;
 146         case PKEY_KEYTYPE_ECC_P521:
 147                 /* 80 byte key, 32 byte aes wkvp, total 112 bytes */
 148                 keysize = 80;
 149                 pkeytype = PKEY_KEYTYPE_ECC;
 150                 fc = CPACF_PCKMO_ENC_ECC_P521_KEY;
 151                 break;
 152         case PKEY_KEYTYPE_ECC_ED25519:
 153                 /* 32 byte key, 32 byte aes wkvp, total 64 bytes */
 154                 keysize = 32;
 155                 pkeytype = PKEY_KEYTYPE_ECC;
 156                 fc = CPACF_PCKMO_ENC_ECC_ED25519_KEY;
 157                 break;
 158         case PKEY_KEYTYPE_ECC_ED448:
 159                 /* 64 byte key, 32 byte aes wkvp, total 96 bytes */
 160                 keysize = 64;
 161                 pkeytype = PKEY_KEYTYPE_ECC;
 162                 fc = CPACF_PCKMO_ENC_ECC_ED448_KEY;
 163                 break;
 164         default:
 165                 PKEY_DBF_ERR("%s unknown/unsupported keytype %u\n",
 166                              __func__, keytype);
 167                 return -EINVAL;
 168         }
 169
 170         if (*protkeylen < keysize + AES_WK_VP_SIZE) {
 171                 PKEY_DBF_ERR("%s prot key buffer size too small: %u < %d\n",
 172                              __func__, *protkeylen, keysize + AES_WK_VP_SIZE);
 173                 return -EINVAL;
 174         }
 175
 176         /* Did we already check for PCKMO ? */
 177         if (!pckmo_functions.bytes[0]) {
 178                 /* no, so check now */
 179                 if (!cpacf_query(CPACF_PCKMO, &pckmo_functions))
 180                         return -ENODEV;
 181         }
 182         /* check for the pckmo subfunction we need now */
 183         if (!cpacf_test_func(&pckmo_functions, fc)) {
 184                 PKEY_DBF_ERR("%s pckmo functions not available\n", __func__);
 185                 return -ENODEV;
 186         }
 187
 188         /* prepare param block */
 189         memset(paramblock, 0, sizeof(paramblock));
 190         memcpy(paramblock, clrkey, keysize);
 191
 192         /* call the pckmo instruction */
 193         cpacf_pckmo(fc, paramblock);
 194
 195         /* copy created protected key to key buffer including the wkvp block */
 196         *protkeylen = keysize + AES_WK_VP_SIZE;
 197         memcpy(protkey, paramblock, *protkeylen);
 198         *protkeytype = pkeytype;
 199
 200         return 0;
 201 }
 202
 203 /*
 204  * Find card and transform secure key into protected key.
 205  */
 206 static int pkey_skey2pkey(const u8 *key, u8 *protkey,
 207                           u32 *protkeylen, u32 *protkeytype)
 208 {
 209         struct keytoken_header *hdr = (struct keytoken_header *)key;
 210         u16 cardnr, domain;
 211         int rc, verify;
 212
 213         zcrypt_wait_api_operational();
 214
 215         /*
 216          * The cca_xxx2protkey call may fail when a card has been
 217          * addressed where the master key was changed after last fetch
 218          * of the mkvp into the cache. Try 3 times: First without verify
 219          * then with verify and last round with verify and old master
 220          * key verification pattern match not ignored.
 221          */
 222         for (verify = 0; verify < 3; verify++) {
 223                 rc = cca_findcard(key, &cardnr, &domain, verify);
 224                 if (rc < 0)
 225                         continue;
 226                 if (rc > 0 && verify < 2)
 227                         continue;
 228                 switch (hdr->version) {
 229                 case TOKVER_CCA_AES:
 230                         rc = cca_sec2protkey(cardnr, domain, key,
 231                                              protkey, protkeylen, protkeytype);
 232                         break;
 233                 case TOKVER_CCA_VLSC:
 234                         rc = cca_cipher2protkey(cardnr, domain, key,
 235                                                 protkey, protkeylen,
 236                                                 protkeytype);
 237                         break;
 238                 default:
 239                         return -EINVAL;
 240                 }
 241                 if (rc == 0)
 242                         break;
 243         }
 244
 245         if (rc)
 246                 pr_debug("%s failed rc=%d\n", __func__, rc);
 247
 248         return rc;
 249 }
 250
 251 /*
 252  * Construct EP11 key with given clear key value.
 253  */
 254 static int pkey_clr2ep11key(const u8 *clrkey, size_t clrkeylen,
 255                             u8 *keybuf, size_t *keybuflen)
 256 {
 257         u32 nr_apqns, *apqns = NULL;
 258         u16 card, dom;
 259         int i, rc;
 260
 261         zcrypt_wait_api_operational();
 262
 263         /* build a list of apqns suitable for ep11 keys with cpacf support */
 264         rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
 265                             ZCRYPT_CEX7,
 266                             ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4,
 267                             NULL);
 268         if (rc)
 269                 goto out;
 270
 271         /* go through the list of apqns and try to bild an ep11 key */
 272         for (rc = -ENODEV, i = 0; i < nr_apqns; i++) {
 273                 card = apqns[i] >> 16;
 274                 dom = apqns[i] & 0xFFFF;
 275                 rc = ep11_clr2keyblob(card, dom, clrkeylen * 8,
 276                                       0, clrkey, keybuf, keybuflen,
 277                                       PKEY_TYPE_EP11);
 278                 if (rc == 0)
 279                         break;
 280         }
 281
 282 out:
 283         kfree(apqns);
 284         if (rc)
 285                 pr_debug("%s failed rc=%d\n", __func__, rc);
 286         return rc;
 287 }
 288
 289 /*
 290  * Find card and transform EP11 secure key into protected key.
 291  */
 292 static int pkey_ep11key2pkey(const u8 *key, size_t keylen,
 293                              u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 294 {
 295         u32 nr_apqns, *apqns = NULL;
 296         int i, j, rc = -ENODEV;
 297         u16 card, dom;
 298
 299         zcrypt_wait_api_operational();
 300
 301         /* try two times in case of failure */
 302         for (i = 0; i < 2 && rc; i++) {
 303
 304                 /* build a list of apqns suitable for this key */
 305                 rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
 306                                     ZCRYPT_CEX7,
 307                                     ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4,
 308                                     ep11_kb_wkvp(key, keylen));
 309                 if (rc)
 310                         continue; /* retry findcard on failure */
 311
 312                 /* go through the list of apqns and try to derive an pkey */
 313                 for (rc = -ENODEV, j = 0; j < nr_apqns && rc; j++) {
 314                         card = apqns[j] >> 16;
 315                         dom = apqns[j] & 0xFFFF;
 316                         rc = ep11_kblob2protkey(card, dom, key, keylen,
 317                                                 protkey, protkeylen, protkeytype);
 318                 }
 319
 320                 kfree(apqns);
 321         }
 322
 323         if (rc)
 324                 pr_debug("%s failed rc=%d\n", __func__, rc);
 325
 326         return rc;
 327 }
 328
 329 /*
 330  * Verify key and give back some info about the key.
 331  */
 332 static int pkey_verifykey(const struct pkey_seckey *seckey,
 333                           u16 *pcardnr, u16 *pdomain,
 334                           u16 *pkeysize, u32 *pattributes)
 335 {
 336         struct secaeskeytoken *t = (struct secaeskeytoken *)seckey;
 337         u16 cardnr, domain;
 338         int rc;
 339
 340         /* check the secure key for valid AES secure key */
 341         rc = cca_check_secaeskeytoken(pkey_dbf_info, 3, (u8 *)seckey, 0);
 342         if (rc)
 343                 goto out;
 344         if (pattributes)
 345                 *pattributes = PKEY_VERIFY_ATTR_AES;
 346         if (pkeysize)
 347                 *pkeysize = t->bitsize;
 348
 349         /* try to find a card which can handle this key */
 350         rc = cca_findcard(seckey->seckey, &cardnr, &domain, 1);
 351         if (rc < 0)
 352                 goto out;
 353
 354         if (rc > 0) {
 355                 /* key mkvp matches to old master key mkvp */
 356                 pr_debug("%s secure key has old mkvp\n", __func__);
 357                 if (pattributes)
 358                         *pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP;
 359                 rc = 0;
 360         }
 361
 362         if (pcardnr)
 363                 *pcardnr = cardnr;
 364         if (pdomain)
 365                 *pdomain = domain;
 366
 367 out:
 368         pr_debug("%s rc=%d\n", __func__, rc);
 369         return rc;
 370 }
 371
 372 /*
 373  * Generate a random protected key
 374  */
 375 static int pkey_genprotkey(u32 keytype, u8 *protkey,
 376                            u32 *protkeylen, u32 *protkeytype)
 377 {
 378         u8 clrkey[32];
 379         int keysize;
 380         int rc;
 381
 382         keysize = pkey_keytype_aes_to_size(keytype);
 383         if (!keysize) {
 384                 PKEY_DBF_ERR("%s unknown/unsupported keytype %d\n", __func__,
 385                              keytype);
 386                 return -EINVAL;
 387         }
 388
 389         /* generate a dummy random clear key */
 390         get_random_bytes(clrkey, keysize);
 391
 392         /* convert it to a dummy protected key */
 393         rc = pkey_clr2protkey(keytype, clrkey,
 394                               protkey, protkeylen, protkeytype);
 395         if (rc)
 396                 return rc;
 397
 398         /* replace the key part of the protected key with random bytes */
 399         get_random_bytes(protkey, keysize);
 400
 401         return 0;
 402 }
 403
 404 /*
 405  * Verify if a protected key is still valid
 406  */
 407 static int pkey_verifyprotkey(const u8 *protkey, u32 protkeylen,
 408                               u32 protkeytype)
 409 {
 410         struct {
 411                 u8 iv[AES_BLOCK_SIZE];
 412                 u8 key[MAXPROTKEYSIZE];
 413         } param;
 414         u8 null_msg[AES_BLOCK_SIZE];
 415         u8 dest_buf[AES_BLOCK_SIZE];
 416         unsigned int k, pkeylen;
 417         unsigned long fc;
 418
 419         switch (protkeytype) {
 420         case PKEY_KEYTYPE_AES_128:
 421                 pkeylen = 16 + AES_WK_VP_SIZE;
 422                 fc = CPACF_KMC_PAES_128;
 423                 break;
 424         case PKEY_KEYTYPE_AES_192:
 425                 pkeylen = 24 + AES_WK_VP_SIZE;
 426                 fc = CPACF_KMC_PAES_192;
 427                 break;
 428         case PKEY_KEYTYPE_AES_256:
 429                 pkeylen = 32 + AES_WK_VP_SIZE;
 430                 fc = CPACF_KMC_PAES_256;
 431                 break;
 432         default:
 433                 PKEY_DBF_ERR("%s unknown/unsupported keytype %u\n", __func__,
 434                              protkeytype);
 435                 return -EINVAL;
 436         }
 437         if (protkeylen != pkeylen) {
 438                 PKEY_DBF_ERR("%s invalid protected key size %u for keytype %u\n",
 439                              __func__, protkeylen, protkeytype);
 440                 return -EINVAL;
 441         }
 442
 443         memset(null_msg, 0, sizeof(null_msg));
 444
 445         memset(param.iv, 0, sizeof(param.iv));
 446         memcpy(param.key, protkey, protkeylen);
 447
 448         k = cpacf_kmc(fc | CPACF_ENCRYPT, &param, null_msg, dest_buf,
 449                       sizeof(null_msg));
 450         if (k != sizeof(null_msg)) {
 451                 PKEY_DBF_ERR("%s protected key is not valid\n", __func__);
 452                 return -EKEYREJECTED;
 453         }
 454
 455         return 0;
 456 }
 457
 458 /* Helper for pkey_nonccatok2pkey, handles aes clear key token */
 459 static int nonccatokaes2pkey(const struct clearkeytoken *t,
 460                              u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 461 {
 462         size_t tmpbuflen = max_t(size_t, SECKEYBLOBSIZE, MAXEP11AESKEYBLOBSIZE);
 463         u8 *tmpbuf = NULL;
 464         u32 keysize;
 465         int rc;
 466
 467         keysize = pkey_keytype_aes_to_size(t->keytype);
 468         if (!keysize) {
 469                 PKEY_DBF_ERR("%s unknown/unsupported keytype %u\n",
 470                              __func__, t->keytype);
 471                 return -EINVAL;
 472         }
 473         if (t->len != keysize) {
 474                 PKEY_DBF_ERR("%s non clear key aes token: invalid key len %u\n",
 475                              __func__, t->len);
 476                 return -EINVAL;
 477         }
 478
 479         /* try direct way with the PCKMO instruction */
 480         rc = pkey_clr2protkey(t->keytype, t->clearkey,
 481                               protkey, protkeylen, protkeytype);
 482         if (!rc)
 483                 goto out;
 484
 485         /* PCKMO failed, so try the CCA secure key way */
 486         tmpbuf = kmalloc(tmpbuflen, GFP_ATOMIC);
 487         if (!tmpbuf)
 488                 return -ENOMEM;
 489         zcrypt_wait_api_operational();
 490         rc = cca_clr2seckey(0xFFFF, 0xFFFF, t->keytype, t->clearkey, tmpbuf);
 491         if (rc)
 492                 goto try_via_ep11;
 493         rc = pkey_skey2pkey(tmpbuf,
 494                             protkey, protkeylen, protkeytype);
 495         if (!rc)
 496                 goto out;
 497
 498 try_via_ep11:
 499         /* if the CCA way also failed, let's try via EP11 */
 500         rc = pkey_clr2ep11key(t->clearkey, t->len,
 501                               tmpbuf, &tmpbuflen);
 502         if (rc)
 503                 goto failure;
 504         rc = pkey_ep11key2pkey(tmpbuf, tmpbuflen,
 505                                protkey, protkeylen, protkeytype);
 506         if (!rc)
 507                 goto out;
 508
 509 failure:
 510         PKEY_DBF_ERR("%s unable to build protected key from clear", __func__);
 511
 512 out:
 513         kfree(tmpbuf);
 514         return rc;
 515 }
 516
 517 /* Helper for pkey_nonccatok2pkey, handles ecc clear key token */
 518 static int nonccatokecc2pkey(const struct clearkeytoken *t,
 519                              u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 520 {
 521         u32 keylen;
 522         int rc;
 523
 524         switch (t->keytype) {
 525         case PKEY_KEYTYPE_ECC_P256:
 526                 keylen = 32;
 527                 break;
 528         case PKEY_KEYTYPE_ECC_P384:
 529                 keylen = 48;
 530                 break;
 531         case PKEY_KEYTYPE_ECC_P521:
 532                 keylen = 80;
 533                 break;
 534         case PKEY_KEYTYPE_ECC_ED25519:
 535                 keylen = 32;
 536                 break;
 537         case PKEY_KEYTYPE_ECC_ED448:
 538                 keylen = 64;
 539                 break;
 540         default:
 541                 PKEY_DBF_ERR("%s unknown/unsupported keytype %u\n",
 542                              __func__, t->keytype);
 543                 return -EINVAL;
 544         }
 545
 546         if (t->len != keylen) {
 547                 PKEY_DBF_ERR("%s non clear key ecc token: invalid key len %u\n",
 548                              __func__, t->len);
 549                 return -EINVAL;
 550         }
 551
 552         /* only one path possible: via PCKMO instruction */
 553         rc = pkey_clr2protkey(t->keytype, t->clearkey,
 554                               protkey, protkeylen, protkeytype);
 555         if (rc) {
 556                 PKEY_DBF_ERR("%s unable to build protected key from clear",
 557                              __func__);
 558         }
 559
 560         return rc;
 561 }
 562
 563 /*
 564  * Transform a non-CCA key token into a protected key
 565  */
 566 static int pkey_nonccatok2pkey(const u8 *key, u32 keylen,
 567                                u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 568 {
 569         struct keytoken_header *hdr = (struct keytoken_header *)key;
 570         int rc = -EINVAL;
 571
 572         switch (hdr->version) {
 573         case TOKVER_PROTECTED_KEY: {
 574                 struct protaeskeytoken *t;
 575
 576                 if (keylen != sizeof(struct protaeskeytoken))
 577                         goto out;
 578                 t = (struct protaeskeytoken *)key;
 579                 rc = pkey_verifyprotkey(t->protkey, t->len, t->keytype);
 580                 if (rc)
 581                         goto out;
 582                 memcpy(protkey, t->protkey, t->len);
 583                 *protkeylen = t->len;
 584                 *protkeytype = t->keytype;
 585                 break;
 586         }
 587         case TOKVER_CLEAR_KEY: {
 588                 struct clearkeytoken *t = (struct clearkeytoken *)key;
 589
 590                 if (keylen < sizeof(struct clearkeytoken) ||
 591                     keylen != sizeof(*t) + t->len)
 592                         goto out;
 593                 switch (t->keytype) {
 594                 case PKEY_KEYTYPE_AES_128:
 595                 case PKEY_KEYTYPE_AES_192:
 596                 case PKEY_KEYTYPE_AES_256:
 597                         rc = nonccatokaes2pkey(t, protkey,
 598                                                protkeylen, protkeytype);
 599                         break;
 600                 case PKEY_KEYTYPE_ECC_P256:
 601                 case PKEY_KEYTYPE_ECC_P384:
 602                 case PKEY_KEYTYPE_ECC_P521:
 603                 case PKEY_KEYTYPE_ECC_ED25519:
 604                 case PKEY_KEYTYPE_ECC_ED448:
 605                         rc = nonccatokecc2pkey(t, protkey,
 606                                                protkeylen, protkeytype);
 607                         break;
 608                 default:
 609                         PKEY_DBF_ERR("%s unknown/unsupported non cca clear key type %u\n",
 610                                      __func__, t->keytype);
 611                         return -EINVAL;
 612                 }
 613                 break;
 614         }
 615         case TOKVER_EP11_AES: {
 616                 /* check ep11 key for exportable as protected key */
 617                 rc = ep11_check_aes_key(pkey_dbf_info, 3, key, keylen, 1);
 618                 if (rc)
 619                         goto out;
 620                 rc = pkey_ep11key2pkey(key, keylen,
 621                                        protkey, protkeylen, protkeytype);
 622                 break;
 623         }
 624         case TOKVER_EP11_AES_WITH_HEADER:
 625                 /* check ep11 key with header for exportable as protected key */
 626                 rc = ep11_check_aes_key_with_hdr(pkey_dbf_info,
 627                                                  3, key, keylen, 1);
 628                 if (rc)
 629                         goto out;
 630                 rc = pkey_ep11key2pkey(key, keylen,
 631                                        protkey, protkeylen, protkeytype);
 632                 break;
 633         default:
 634                 PKEY_DBF_ERR("%s unknown/unsupported non-CCA token version %d\n",
 635                              __func__, hdr->version);
 636         }
 637
 638 out:
 639         return rc;
 640 }
 641
 642 /*
 643  * Transform a CCA internal key token into a protected key
 644  */
 645 static int pkey_ccainttok2pkey(const u8 *key, u32 keylen,
 646                                u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 647 {
 648         struct keytoken_header *hdr = (struct keytoken_header *)key;
 649
 650         switch (hdr->version) {
 651         case TOKVER_CCA_AES:
 652                 if (keylen != sizeof(struct secaeskeytoken))
 653                         return -EINVAL;
 654                 break;
 655         case TOKVER_CCA_VLSC:
 656                 if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE)
 657                         return -EINVAL;
 658                 break;
 659         default:
 660                 PKEY_DBF_ERR("%s unknown/unsupported CCA internal token version %d\n",
 661                              __func__, hdr->version);
 662                 return -EINVAL;
 663         }
 664
 665         return pkey_skey2pkey(key, protkey, protkeylen, protkeytype);
 666 }
 667
 668 /*
 669  * Transform a key blob (of any type) into a protected key
 670  */
 671 int pkey_keyblob2pkey(const u8 *key, u32 keylen,
 672                       u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 673 {
 674         struct keytoken_header *hdr = (struct keytoken_header *)key;
 675         int rc;
 676
 677         if (keylen < sizeof(struct keytoken_header)) {
 678                 PKEY_DBF_ERR("%s invalid keylen %d\n", __func__, keylen);
 679                 return -EINVAL;
 680         }
 681
 682         switch (hdr->type) {
 683         case TOKTYPE_NON_CCA:
 684                 rc = pkey_nonccatok2pkey(key, keylen,
 685                                          protkey, protkeylen, protkeytype);
 686                 break;
 687         case TOKTYPE_CCA_INTERNAL:
 688                 rc = pkey_ccainttok2pkey(key, keylen,
 689                                          protkey, protkeylen, protkeytype);
 690                 break;
 691         default:
 692                 PKEY_DBF_ERR("%s unknown/unsupported blob type %d\n",
 693                              __func__, hdr->type);
 694                 return -EINVAL;
 695         }
 696
 697         pr_debug("%s rc=%d\n", __func__, rc);
 698         return rc;
 699 }
 700 EXPORT_SYMBOL(pkey_keyblob2pkey);
 701
 702 static int pkey_genseckey2(const struct pkey_apqn *apqns, size_t nr_apqns,
 703                            enum pkey_key_type ktype, enum pkey_key_size ksize,
 704                            u32 kflags, u8 *keybuf, size_t *keybufsize)
 705 {
 706         int i, card, dom, rc;
 707
 708         /* check for at least one apqn given */
 709         if (!apqns || !nr_apqns)
 710                 return -EINVAL;
 711
 712         /* check key type and size */
 713         switch (ktype) {
 714         case PKEY_TYPE_CCA_DATA:
 715         case PKEY_TYPE_CCA_CIPHER:
 716                 if (*keybufsize < SECKEYBLOBSIZE)
 717                         return -EINVAL;
 718                 break;
 719         case PKEY_TYPE_EP11:
 720                 if (*keybufsize < MINEP11AESKEYBLOBSIZE)
 721                         return -EINVAL;
 722                 break;
 723         case PKEY_TYPE_EP11_AES:
 724                 if (*keybufsize < (sizeof(struct ep11kblob_header) +
 725                                    MINEP11AESKEYBLOBSIZE))
 726                         return -EINVAL;
 727                 break;
 728         default:
 729                 return -EINVAL;
 730         }
 731         switch (ksize) {
 732         case PKEY_SIZE_AES_128:
 733         case PKEY_SIZE_AES_192:
 734         case PKEY_SIZE_AES_256:
 735                 break;
 736         default:
 737                 return -EINVAL;
 738         }
 739
 740         /* simple try all apqns from the list */
 741         for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
 742                 card = apqns[i].card;
 743                 dom = apqns[i].domain;
 744                 if (ktype == PKEY_TYPE_EP11 ||
 745                     ktype == PKEY_TYPE_EP11_AES) {
 746                         rc = ep11_genaeskey(card, dom, ksize, kflags,
 747                                             keybuf, keybufsize, ktype);
 748                 } else if (ktype == PKEY_TYPE_CCA_DATA) {
 749                         rc = cca_genseckey(card, dom, ksize, keybuf);
 750                         *keybufsize = (rc ? 0 : SECKEYBLOBSIZE);
 751                 } else {
 752                         /* TOKVER_CCA_VLSC */
 753                         rc = cca_gencipherkey(card, dom, ksize, kflags,
 754                                               keybuf, keybufsize);
 755                 }
 756                 if (rc == 0)
 757                         break;
 758         }
 759
 760         return rc;
 761 }
 762
 763 static int pkey_clr2seckey2(const struct pkey_apqn *apqns, size_t nr_apqns,
 764                             enum pkey_key_type ktype, enum pkey_key_size ksize,
 765                             u32 kflags, const u8 *clrkey,
 766                             u8 *keybuf, size_t *keybufsize)
 767 {
 768         int i, card, dom, rc;
 769
 770         /* check for at least one apqn given */
 771         if (!apqns || !nr_apqns)
 772                 return -EINVAL;
 773
 774         /* check key type and size */
 775         switch (ktype) {
 776         case PKEY_TYPE_CCA_DATA:
 777         case PKEY_TYPE_CCA_CIPHER:
 778                 if (*keybufsize < SECKEYBLOBSIZE)
 779                         return -EINVAL;
 780                 break;
 781         case PKEY_TYPE_EP11:
 782                 if (*keybufsize < MINEP11AESKEYBLOBSIZE)
 783                         return -EINVAL;
 784                 break;
 785         case PKEY_TYPE_EP11_AES:
 786                 if (*keybufsize < (sizeof(struct ep11kblob_header) +
 787                                    MINEP11AESKEYBLOBSIZE))
 788                         return -EINVAL;
 789                 break;
 790         default:
 791                 return -EINVAL;
 792         }
 793         switch (ksize) {
 794         case PKEY_SIZE_AES_128:
 795         case PKEY_SIZE_AES_192:
 796         case PKEY_SIZE_AES_256:
 797                 break;
 798         default:
 799                 return -EINVAL;
 800         }
 801
 802         zcrypt_wait_api_operational();
 803
 804         /* simple try all apqns from the list */
 805         for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
 806                 card = apqns[i].card;
 807                 dom = apqns[i].domain;
 808                 if (ktype == PKEY_TYPE_EP11 ||
 809                     ktype == PKEY_TYPE_EP11_AES) {
 810                         rc = ep11_clr2keyblob(card, dom, ksize, kflags,
 811                                               clrkey, keybuf, keybufsize,
 812                                               ktype);
 813                 } else if (ktype == PKEY_TYPE_CCA_DATA) {
 814                         rc = cca_clr2seckey(card, dom, ksize,
 815                                             clrkey, keybuf);
 816                         *keybufsize = (rc ? 0 : SECKEYBLOBSIZE);
 817                 } else {
 818                         /* TOKVER_CCA_VLSC */
 819                         rc = cca_clr2cipherkey(card, dom, ksize, kflags,
 820                                                clrkey, keybuf, keybufsize);
 821                 }
 822                 if (rc == 0)
 823                         break;
 824         }
 825
 826         return rc;
 827 }
 828
 829 static int pkey_verifykey2(const u8 *key, size_t keylen,
 830                            u16 *cardnr, u16 *domain,
 831                            enum pkey_key_type *ktype,
 832                            enum pkey_key_size *ksize, u32 *flags)
 833 {
 834         struct keytoken_header *hdr = (struct keytoken_header *)key;
 835         u32 _nr_apqns, *_apqns = NULL;
 836         int rc;
 837
 838         if (keylen < sizeof(struct keytoken_header))
 839                 return -EINVAL;
 840
 841         if (hdr->type == TOKTYPE_CCA_INTERNAL &&
 842             hdr->version == TOKVER_CCA_AES) {
 843                 struct secaeskeytoken *t = (struct secaeskeytoken *)key;
 844
 845                 rc = cca_check_secaeskeytoken(pkey_dbf_info, 3, key, 0);
 846                 if (rc)
 847                         goto out;
 848                 if (ktype)
 849                         *ktype = PKEY_TYPE_CCA_DATA;
 850                 if (ksize)
 851                         *ksize = (enum pkey_key_size)t->bitsize;
 852
 853                 rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain,
 854                                    ZCRYPT_CEX3C, AES_MK_SET, t->mkvp, 0, 1);
 855                 if (rc == 0 && flags)
 856                         *flags = PKEY_FLAGS_MATCH_CUR_MKVP;
 857                 if (rc == -ENODEV) {
 858                         rc = cca_findcard2(&_apqns, &_nr_apqns,
 859                                            *cardnr, *domain,
 860                                            ZCRYPT_CEX3C, AES_MK_SET,
 861                                            0, t->mkvp, 1);
 862                         if (rc == 0 && flags)
 863                                 *flags = PKEY_FLAGS_MATCH_ALT_MKVP;
 864                 }
 865                 if (rc)
 866                         goto out;
 867
 868                 *cardnr = ((struct pkey_apqn *)_apqns)->card;
 869                 *domain = ((struct pkey_apqn *)_apqns)->domain;
 870
 871         } else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
 872                    hdr->version == TOKVER_CCA_VLSC) {
 873                 struct cipherkeytoken *t = (struct cipherkeytoken *)key;
 874
 875                 rc = cca_check_secaescipherkey(pkey_dbf_info, 3, key, 0, 1);
 876                 if (rc)
 877                         goto out;
 878                 if (ktype)
 879                         *ktype = PKEY_TYPE_CCA_CIPHER;
 880                 if (ksize) {
 881                         *ksize = PKEY_SIZE_UNKNOWN;
 882                         if (!t->plfver && t->wpllen == 512)
 883                                 *ksize = PKEY_SIZE_AES_128;
 884                         else if (!t->plfver && t->wpllen == 576)
 885                                 *ksize = PKEY_SIZE_AES_192;
 886                         else if (!t->plfver && t->wpllen == 640)
 887                                 *ksize = PKEY_SIZE_AES_256;
 888                 }
 889
 890                 rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain,
 891                                    ZCRYPT_CEX6, AES_MK_SET, t->mkvp0, 0, 1);
 892                 if (rc == 0 && flags)
 893                         *flags = PKEY_FLAGS_MATCH_CUR_MKVP;
 894                 if (rc == -ENODEV) {
 895                         rc = cca_findcard2(&_apqns, &_nr_apqns,
 896                                            *cardnr, *domain,
 897                                            ZCRYPT_CEX6, AES_MK_SET,
 898                                            0, t->mkvp0, 1);
 899                         if (rc == 0 && flags)
 900                                 *flags = PKEY_FLAGS_MATCH_ALT_MKVP;
 901                 }
 902                 if (rc)
 903                         goto out;
 904
 905                 *cardnr = ((struct pkey_apqn *)_apqns)->card;
 906                 *domain = ((struct pkey_apqn *)_apqns)->domain;
 907
 908         } else if (hdr->type == TOKTYPE_NON_CCA &&
 909                    hdr->version == TOKVER_EP11_AES) {
 910                 struct ep11keyblob *kb = (struct ep11keyblob *)key;
 911                 int api;
 912
 913                 rc = ep11_check_aes_key(pkey_dbf_info, 3, key, keylen, 1);
 914                 if (rc)
 915                         goto out;
 916                 if (ktype)
 917                         *ktype = PKEY_TYPE_EP11;
 918                 if (ksize)
 919                         *ksize = kb->head.bitlen;
 920
 921                 api = ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4;
 922                 rc = ep11_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain,
 923                                     ZCRYPT_CEX7, api,
 924                                     ep11_kb_wkvp(key, keylen));
 925                 if (rc)
 926                         goto out;
 927
 928                 if (flags)
 929                         *flags = PKEY_FLAGS_MATCH_CUR_MKVP;
 930
 931                 *cardnr = ((struct pkey_apqn *)_apqns)->card;
 932                 *domain = ((struct pkey_apqn *)_apqns)->domain;
 933
 934         } else if (hdr->type == TOKTYPE_NON_CCA &&
 935                    hdr->version == TOKVER_EP11_AES_WITH_HEADER) {
 936                 struct ep11kblob_header *kh = (struct ep11kblob_header *)key;
 937                 int api;
 938
 939                 rc = ep11_check_aes_key_with_hdr(pkey_dbf_info,
 940                                                  3, key, keylen, 1);
 941                 if (rc)
 942                         goto out;
 943                 if (ktype)
 944                         *ktype = PKEY_TYPE_EP11_AES;
 945                 if (ksize)
 946                         *ksize = kh->bitlen;
 947
 948                 api = ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4;
 949                 rc = ep11_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain,
 950                                     ZCRYPT_CEX7, api,
 951                                     ep11_kb_wkvp(key, keylen));
 952                 if (rc)
 953                         goto out;
 954
 955                 if (flags)
 956                         *flags = PKEY_FLAGS_MATCH_CUR_MKVP;
 957
 958                 *cardnr = ((struct pkey_apqn *)_apqns)->card;
 959                 *domain = ((struct pkey_apqn *)_apqns)->domain;
 960         } else {
 961                 rc = -EINVAL;
 962         }
 963
 964 out:
 965         kfree(_apqns);
 966         return rc;
 967 }
 968
 969 static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns,
 970                               const u8 *key, size_t keylen,
 971                               u8 *protkey, u32 *protkeylen, u32 *protkeytype)
 972 {
 973         struct keytoken_header *hdr = (struct keytoken_header *)key;
 974         int i, card, dom, rc;
 975
 976         /* check for at least one apqn given */
 977         if (!apqns || !nr_apqns)
 978                 return -EINVAL;
 979
 980         if (keylen < sizeof(struct keytoken_header))
 981                 return -EINVAL;
 982
 983         if (hdr->type == TOKTYPE_CCA_INTERNAL) {
 984                 if (hdr->version == TOKVER_CCA_AES) {
 985                         if (keylen != sizeof(struct secaeskeytoken))
 986                                 return -EINVAL;
 987                         if (cca_check_secaeskeytoken(pkey_dbf_info, 3, key, 0))
 988                                 return -EINVAL;
 989                 } else if (hdr->version == TOKVER_CCA_VLSC) {
 990                         if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE)
 991                                 return -EINVAL;
 992                         if (cca_check_secaescipherkey(pkey_dbf_info,
 993                                                       3, key, 0, 1))
 994                                 return -EINVAL;
 995                 } else {
 996                         PKEY_DBF_ERR("%s unknown CCA internal token version %d\n",
 997                                      __func__, hdr->version);
 998                         return -EINVAL;
 999                 }
1000         } else if (hdr->type == TOKTYPE_NON_CCA) {
1001                 if (hdr->version == TOKVER_EP11_AES) {
1002                         if (ep11_check_aes_key(pkey_dbf_info,
1003                                                3, key, keylen, 1))
1004                                 return -EINVAL;
1005                 } else if (hdr->version == TOKVER_EP11_AES_WITH_HEADER) {
1006                         if (ep11_check_aes_key_with_hdr(pkey_dbf_info,
1007                                                         3, key, keylen, 1))
1008                                 return -EINVAL;
1009                 } else {
1010                         return pkey_nonccatok2pkey(key, keylen,
1011                                                    protkey, protkeylen,
1012                                                    protkeytype);
1013                 }
1014         } else {
1015                 PKEY_DBF_ERR("%s unknown/unsupported blob type %d\n",
1016                              __func__, hdr->type);
1017                 return -EINVAL;
1018         }
1019
1020         zcrypt_wait_api_operational();
1021
1022         /* simple try all apqns from the list */
1023         for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
1024                 card = apqns[i].card;
1025                 dom = apqns[i].domain;
1026                 if (hdr->type == TOKTYPE_CCA_INTERNAL &&
1027                     hdr->version == TOKVER_CCA_AES) {
1028                         rc = cca_sec2protkey(card, dom, key,
1029                                              protkey, protkeylen, protkeytype);
1030                 } else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
1031                            hdr->version == TOKVER_CCA_VLSC) {
1032                         rc = cca_cipher2protkey(card, dom, key,
1033                                                 protkey, protkeylen,
1034                                                 protkeytype);
1035                 } else {
1036                         rc = ep11_kblob2protkey(card, dom, key, keylen,
1037                                                 protkey, protkeylen,
1038                                                 protkeytype);
1039                 }
1040                 if (rc == 0)
1041                         break;
1042         }
1043
1044         return rc;
1045 }
1046
1047 static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags,
1048                           struct pkey_apqn *apqns, size_t *nr_apqns)
1049 {
1050         struct keytoken_header *hdr = (struct keytoken_header *)key;
1051         u32 _nr_apqns, *_apqns = NULL;
1052         int rc;
1053
1054         if (keylen < sizeof(struct keytoken_header) || flags == 0)
1055                 return -EINVAL;
1056
1057         zcrypt_wait_api_operational();
1058
1059         if (hdr->type == TOKTYPE_NON_CCA &&
1060             (hdr->version == TOKVER_EP11_AES_WITH_HEADER ||
1061              hdr->version == TOKVER_EP11_ECC_WITH_HEADER) &&
1062             is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) {
1063                 struct ep11keyblob *kb = (struct ep11keyblob *)
1064                         (key + sizeof(struct ep11kblob_header));
1065                 int minhwtype = 0, api = 0;
1066
1067                 if (flags != PKEY_FLAGS_MATCH_CUR_MKVP)
1068                         return -EINVAL;
1069                 if (kb->attr & EP11_BLOB_PKEY_EXTRACTABLE) {
1070                         minhwtype = ZCRYPT_CEX7;
1071                         api = ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4;
1072                 }
1073                 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1074                                     minhwtype, api, kb->wkvp);
1075                 if (rc)
1076                         goto out;
1077         } else if (hdr->type == TOKTYPE_NON_CCA &&
1078                    hdr->version == TOKVER_EP11_AES &&
1079                    is_ep11_keyblob(key)) {
1080                 struct ep11keyblob *kb = (struct ep11keyblob *)key;
1081                 int minhwtype = 0, api = 0;
1082
1083                 if (flags != PKEY_FLAGS_MATCH_CUR_MKVP)
1084                         return -EINVAL;
1085                 if (kb->attr & EP11_BLOB_PKEY_EXTRACTABLE) {
1086                         minhwtype = ZCRYPT_CEX7;
1087                         api = ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4;
1088                 }
1089                 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1090                                     minhwtype, api, kb->wkvp);
1091                 if (rc)
1092                         goto out;
1093         } else if (hdr->type == TOKTYPE_CCA_INTERNAL) {
1094                 u64 cur_mkvp = 0, old_mkvp = 0;
1095                 int minhwtype = ZCRYPT_CEX3C;
1096
1097                 if (hdr->version == TOKVER_CCA_AES) {
1098                         struct secaeskeytoken *t = (struct secaeskeytoken *)key;
1099
1100                         if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1101                                 cur_mkvp = t->mkvp;
1102                         if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
1103                                 old_mkvp = t->mkvp;
1104                 } else if (hdr->version == TOKVER_CCA_VLSC) {
1105                         struct cipherkeytoken *t = (struct cipherkeytoken *)key;
1106
1107                         minhwtype = ZCRYPT_CEX6;
1108                         if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1109                                 cur_mkvp = t->mkvp0;
1110                         if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
1111                                 old_mkvp = t->mkvp0;
1112                 } else {
1113                         /* unknown cca internal token type */
1114                         return -EINVAL;
1115                 }
1116                 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1117                                    minhwtype, AES_MK_SET,
1118                                    cur_mkvp, old_mkvp, 1);
1119                 if (rc)
1120                         goto out;
1121         } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) {
1122                 struct eccprivkeytoken *t = (struct eccprivkeytoken *)key;
1123                 u64 cur_mkvp = 0, old_mkvp = 0;
1124
1125                 if (t->secid == 0x20) {
1126                         if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1127                                 cur_mkvp = t->mkvp;
1128                         if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
1129                                 old_mkvp = t->mkvp;
1130                 } else {
1131                         /* unknown cca internal 2 token type */
1132                         return -EINVAL;
1133                 }
1134                 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1135                                    ZCRYPT_CEX7, APKA_MK_SET,
1136                                    cur_mkvp, old_mkvp, 1);
1137                 if (rc)
1138                         goto out;
1139         } else {
1140                 return -EINVAL;
1141         }
1142
1143         if (apqns) {
1144                 if (*nr_apqns < _nr_apqns)
1145                         rc = -ENOSPC;
1146                 else
1147                         memcpy(apqns, _apqns, _nr_apqns * sizeof(u32));
1148         }
1149         *nr_apqns = _nr_apqns;
1150
1151 out:
1152         kfree(_apqns);
1153         return rc;
1154 }
1155
1156 static int pkey_apqns4keytype(enum pkey_key_type ktype,
1157                               u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags,
1158                               struct pkey_apqn *apqns, size_t *nr_apqns)
1159 {
1160         u32 _nr_apqns, *_apqns = NULL;
1161         int rc;
1162
1163         zcrypt_wait_api_operational();
1164
1165         if (ktype == PKEY_TYPE_CCA_DATA || ktype == PKEY_TYPE_CCA_CIPHER) {
1166                 u64 cur_mkvp = 0, old_mkvp = 0;
1167                 int minhwtype = ZCRYPT_CEX3C;
1168
1169                 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1170                         cur_mkvp = *((u64 *)cur_mkvp);
1171                 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
1172                         old_mkvp = *((u64 *)alt_mkvp);
1173                 if (ktype == PKEY_TYPE_CCA_CIPHER)
1174                         minhwtype = ZCRYPT_CEX6;
1175                 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1176                                    minhwtype, AES_MK_SET,
1177                                    cur_mkvp, old_mkvp, 1);
1178                 if (rc)
1179                         goto out;
1180         } else if (ktype == PKEY_TYPE_CCA_ECC) {
1181                 u64 cur_mkvp = 0, old_mkvp = 0;
1182
1183                 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1184                         cur_mkvp = *((u64 *)cur_mkvp);
1185                 if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
1186                         old_mkvp = *((u64 *)alt_mkvp);
1187                 rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1188                                    ZCRYPT_CEX7, APKA_MK_SET,
1189                                    cur_mkvp, old_mkvp, 1);
1190                 if (rc)
1191                         goto out;
1192
1193         } else if (ktype == PKEY_TYPE_EP11 ||
1194                    ktype == PKEY_TYPE_EP11_AES ||
1195                    ktype == PKEY_TYPE_EP11_ECC) {
1196                 u8 *wkvp = NULL;
1197                 int api;
1198
1199                 if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
1200                         wkvp = cur_mkvp;
1201                 api = ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4;
1202                 rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
1203                                     ZCRYPT_CEX7, api, wkvp);
1204                 if (rc)
1205                         goto out;
1206
1207         } else {
1208                 return -EINVAL;
1209         }
1210
1211         if (apqns) {
1212                 if (*nr_apqns < _nr_apqns)
1213                         rc = -ENOSPC;
1214                 else
1215                         memcpy(apqns, _apqns, _nr_apqns * sizeof(u32));
1216         }
1217         *nr_apqns = _nr_apqns;
1218
1219 out:
1220         kfree(_apqns);
1221         return rc;
1222 }
1223
1224 static int pkey_keyblob2pkey3(const struct pkey_apqn *apqns, size_t nr_apqns,
1225                               const u8 *key, size_t keylen,
1226                               u8 *protkey, u32 *protkeylen, u32 *protkeytype)
1227 {
1228         struct keytoken_header *hdr = (struct keytoken_header *)key;
1229         int i, card, dom, rc;
1230
1231         /* check for at least one apqn given */
1232         if (!apqns || !nr_apqns)
1233                 return -EINVAL;
1234
1235         if (keylen < sizeof(struct keytoken_header))
1236                 return -EINVAL;
1237
1238         if (hdr->type == TOKTYPE_NON_CCA &&
1239             hdr->version == TOKVER_EP11_AES_WITH_HEADER &&
1240             is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) {
1241                 /* EP11 AES key blob with header */
1242                 if (ep11_check_aes_key_with_hdr(pkey_dbf_info,
1243                                                 3, key, keylen, 1))
1244                         return -EINVAL;
1245         } else if (hdr->type == TOKTYPE_NON_CCA &&
1246                    hdr->version == TOKVER_EP11_ECC_WITH_HEADER &&
1247                    is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) {
1248                 /* EP11 ECC key blob with header */
1249                 if (ep11_check_ecc_key_with_hdr(pkey_dbf_info,
1250                                                 3, key, keylen, 1))
1251                         return -EINVAL;
1252         } else if (hdr->type == TOKTYPE_NON_CCA &&
1253                    hdr->version == TOKVER_EP11_AES &&
1254                    is_ep11_keyblob(key)) {
1255                 /* EP11 AES key blob with header in session field */
1256                 if (ep11_check_aes_key(pkey_dbf_info, 3, key, keylen, 1))
1257                         return -EINVAL;
1258         } else  if (hdr->type == TOKTYPE_CCA_INTERNAL) {
1259                 if (hdr->version == TOKVER_CCA_AES) {
1260                         /* CCA AES data key */
1261                         if (keylen != sizeof(struct secaeskeytoken))
1262                                 return -EINVAL;
1263                         if (cca_check_secaeskeytoken(pkey_dbf_info, 3, key, 0))
1264                                 return -EINVAL;
1265                 } else if (hdr->version == TOKVER_CCA_VLSC) {
1266                         /* CCA AES cipher key */
1267                         if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE)
1268                                 return -EINVAL;
1269                         if (cca_check_secaescipherkey(pkey_dbf_info,
1270                                                       3, key, 0, 1))
1271                                 return -EINVAL;
1272                 } else {
1273                         PKEY_DBF_ERR("%s unknown CCA internal token version %d\n",
1274                                      __func__, hdr->version);
1275                         return -EINVAL;
1276                 }
1277         } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) {
1278                 /* CCA ECC (private) key */
1279                 if (keylen < sizeof(struct eccprivkeytoken))
1280                         return -EINVAL;
1281                 if (cca_check_sececckeytoken(pkey_dbf_info, 3, key, keylen, 1))
1282                         return -EINVAL;
1283         } else if (hdr->type == TOKTYPE_NON_CCA) {
1284                 return pkey_nonccatok2pkey(key, keylen,
1285                                            protkey, protkeylen, protkeytype);
1286         } else {
1287                 PKEY_DBF_ERR("%s unknown/unsupported blob type %d\n",
1288                              __func__, hdr->type);
1289                 return -EINVAL;
1290         }
1291
1292         /* simple try all apqns from the list */
1293         for (rc = -ENODEV, i = 0; rc && i < nr_apqns; i++) {
1294                 card = apqns[i].card;
1295                 dom = apqns[i].domain;
1296                 if (hdr->type == TOKTYPE_NON_CCA &&
1297                     (hdr->version == TOKVER_EP11_AES_WITH_HEADER ||
1298                      hdr->version == TOKVER_EP11_ECC_WITH_HEADER) &&
1299                     is_ep11_keyblob(key + sizeof(struct ep11kblob_header)))
1300                         rc = ep11_kblob2protkey(card, dom, key, hdr->len,
1301                                                 protkey, protkeylen,
1302                                                 protkeytype);
1303                 else if (hdr->type == TOKTYPE_NON_CCA &&
1304                          hdr->version == TOKVER_EP11_AES &&
1305                          is_ep11_keyblob(key))
1306                         rc = ep11_kblob2protkey(card, dom, key, hdr->len,
1307                                                 protkey, protkeylen,
1308                                                 protkeytype);
1309                 else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
1310                          hdr->version == TOKVER_CCA_AES)
1311                         rc = cca_sec2protkey(card, dom, key, protkey,
1312                                              protkeylen, protkeytype);
1313                 else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
1314                          hdr->version == TOKVER_CCA_VLSC)
1315                         rc = cca_cipher2protkey(card, dom, key, protkey,
1316                                                 protkeylen, protkeytype);
1317                 else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA)
1318                         rc = cca_ecc2protkey(card, dom, key, protkey,
1319                                              protkeylen, protkeytype);
1320                 else
1321                         return -EINVAL;
1322         }
1323
1324         return rc;
1325 }
1326
1327 /*
1328  * File io functions
1329  */
1330
1331 static void *_copy_key_from_user(void __user *ukey, size_t keylen)
1332 {
1333         if (!ukey || keylen < MINKEYBLOBBUFSIZE || keylen > KEYBLOBBUFSIZE)
1334                 return ERR_PTR(-EINVAL);
1335
1336         return memdup_user(ukey, keylen);
1337 }
1338
1339 static void *_copy_apqns_from_user(void __user *uapqns, size_t nr_apqns)
1340 {
1341         if (!uapqns || nr_apqns == 0)
1342                 return NULL;
1343
1344         return memdup_user(uapqns, nr_apqns * sizeof(struct pkey_apqn));
1345 }
1346
1347 static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
1348                                 unsigned long arg)
1349 {
1350         int rc;
1351
1352         switch (cmd) {
1353         case PKEY_GENSECK: {
1354                 struct pkey_genseck __user *ugs = (void __user *)arg;
1355                 struct pkey_genseck kgs;
1356
1357                 if (copy_from_user(&kgs, ugs, sizeof(kgs)))
1358                         return -EFAULT;
1359                 rc = cca_genseckey(kgs.cardnr, kgs.domain,
1360                                    kgs.keytype, kgs.seckey.seckey);
1361                 pr_debug("%s cca_genseckey()=%d\n", __func__, rc);
1362                 if (rc)
1363                         break;
1364                 if (copy_to_user(ugs, &kgs, sizeof(kgs)))
1365                         return -EFAULT;
1366                 break;
1367         }
1368         case PKEY_CLR2SECK: {
1369                 struct pkey_clr2seck __user *ucs = (void __user *)arg;
1370                 struct pkey_clr2seck kcs;
1371
1372                 if (copy_from_user(&kcs, ucs, sizeof(kcs)))
1373                         return -EFAULT;
1374                 rc = cca_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype,
1375                                     kcs.clrkey.clrkey, kcs.seckey.seckey);
1376                 pr_debug("%s cca_clr2seckey()=%d\n", __func__, rc);
1377                 if (rc)
1378                         break;
1379                 if (copy_to_user(ucs, &kcs, sizeof(kcs)))
1380                         return -EFAULT;
1381                 memzero_explicit(&kcs, sizeof(kcs));
1382                 break;
1383         }
1384         case PKEY_SEC2PROTK: {
1385                 struct pkey_sec2protk __user *usp = (void __user *)arg;
1386                 struct pkey_sec2protk ksp;
1387
1388                 if (copy_from_user(&ksp, usp, sizeof(ksp)))
1389                         return -EFAULT;
1390                 ksp.protkey.len = sizeof(ksp.protkey.protkey);
1391                 rc = cca_sec2protkey(ksp.cardnr, ksp.domain,
1392                                      ksp.seckey.seckey, ksp.protkey.protkey,
1393                                      &ksp.protkey.len, &ksp.protkey.type);
1394                 pr_debug("%s cca_sec2protkey()=%d\n", __func__, rc);
1395                 if (rc)
1396                         break;
1397                 if (copy_to_user(usp, &ksp, sizeof(ksp)))
1398                         return -EFAULT;
1399                 break;
1400         }
1401         case PKEY_CLR2PROTK: {
1402                 struct pkey_clr2protk __user *ucp = (void __user *)arg;
1403                 struct pkey_clr2protk kcp;
1404
1405                 if (copy_from_user(&kcp, ucp, sizeof(kcp)))
1406                         return -EFAULT;
1407                 kcp.protkey.len = sizeof(kcp.protkey.protkey);
1408                 rc = pkey_clr2protkey(kcp.keytype, kcp.clrkey.clrkey,
1409                                       kcp.protkey.protkey,
1410                                       &kcp.protkey.len, &kcp.protkey.type);
1411                 pr_debug("%s pkey_clr2protkey()=%d\n", __func__, rc);
1412                 if (rc)
1413                         break;
1414                 if (copy_to_user(ucp, &kcp, sizeof(kcp)))
1415                         return -EFAULT;
1416                 memzero_explicit(&kcp, sizeof(kcp));
1417                 break;
1418         }
1419         case PKEY_FINDCARD: {
1420                 struct pkey_findcard __user *ufc = (void __user *)arg;
1421                 struct pkey_findcard kfc;
1422
1423                 if (copy_from_user(&kfc, ufc, sizeof(kfc)))
1424                         return -EFAULT;
1425                 rc = cca_findcard(kfc.seckey.seckey,
1426                                   &kfc.cardnr, &kfc.domain, 1);
1427                 pr_debug("%s cca_findcard()=%d\n", __func__, rc);
1428                 if (rc < 0)
1429                         break;
1430                 if (copy_to_user(ufc, &kfc, sizeof(kfc)))
1431                         return -EFAULT;
1432                 break;
1433         }
1434         case PKEY_SKEY2PKEY: {
1435                 struct pkey_skey2pkey __user *usp = (void __user *)arg;
1436                 struct pkey_skey2pkey ksp;
1437
1438                 if (copy_from_user(&ksp, usp, sizeof(ksp)))
1439                         return -EFAULT;
1440                 ksp.protkey.len = sizeof(ksp.protkey.protkey);
1441                 rc = pkey_skey2pkey(ksp.seckey.seckey, ksp.protkey.protkey,
1442                                     &ksp.protkey.len, &ksp.protkey.type);
1443                 pr_debug("%s pkey_skey2pkey()=%d\n", __func__, rc);
1444                 if (rc)
1445                         break;
1446                 if (copy_to_user(usp, &ksp, sizeof(ksp)))
1447                         return -EFAULT;
1448                 break;
1449         }
1450         case PKEY_VERIFYKEY: {
1451                 struct pkey_verifykey __user *uvk = (void __user *)arg;
1452                 struct pkey_verifykey kvk;
1453
1454                 if (copy_from_user(&kvk, uvk, sizeof(kvk)))
1455                         return -EFAULT;
1456                 rc = pkey_verifykey(&kvk.seckey, &kvk.cardnr, &kvk.domain,
1457                                     &kvk.keysize, &kvk.attributes);
1458                 pr_debug("%s pkey_verifykey()=%d\n", __func__, rc);
1459                 if (rc)
1460                         break;
1461                 if (copy_to_user(uvk, &kvk, sizeof(kvk)))
1462                         return -EFAULT;
1463                 break;
1464         }
1465         case PKEY_GENPROTK: {
1466                 struct pkey_genprotk __user *ugp = (void __user *)arg;
1467                 struct pkey_genprotk kgp;
1468
1469                 if (copy_from_user(&kgp, ugp, sizeof(kgp)))
1470                         return -EFAULT;
1471                 kgp.protkey.len = sizeof(kgp.protkey.protkey);
1472                 rc = pkey_genprotkey(kgp.keytype, kgp.protkey.protkey,
1473                                      &kgp.protkey.len, &kgp.protkey.type);
1474                 pr_debug("%s pkey_genprotkey()=%d\n", __func__, rc);
1475                 if (rc)
1476                         break;
1477                 if (copy_to_user(ugp, &kgp, sizeof(kgp)))
1478                         return -EFAULT;
1479                 break;
1480         }
1481         case PKEY_VERIFYPROTK: {
1482                 struct pkey_verifyprotk __user *uvp = (void __user *)arg;
1483                 struct pkey_verifyprotk kvp;
1484
1485                 if (copy_from_user(&kvp, uvp, sizeof(kvp)))
1486                         return -EFAULT;
1487                 rc = pkey_verifyprotkey(kvp.protkey.protkey,
1488                                         kvp.protkey.len, kvp.protkey.type);
1489                 pr_debug("%s pkey_verifyprotkey()=%d\n", __func__, rc);
1490                 break;
1491         }
1492         case PKEY_KBLOB2PROTK: {
1493                 struct pkey_kblob2pkey __user *utp = (void __user *)arg;
1494                 struct pkey_kblob2pkey ktp;
1495                 u8 *kkey;
1496
1497                 if (copy_from_user(&ktp, utp, sizeof(ktp)))
1498                         return -EFAULT;
1499                 kkey = _copy_key_from_user(ktp.key, ktp.keylen);
1500                 if (IS_ERR(kkey))
1501                         return PTR_ERR(kkey);
1502                 ktp.protkey.len = sizeof(ktp.protkey.protkey);
1503                 rc = pkey_keyblob2pkey(kkey, ktp.keylen, ktp.protkey.protkey,
1504                                        &ktp.protkey.len, &ktp.protkey.type);
1505                 pr_debug("%s pkey_keyblob2pkey()=%d\n", __func__, rc);
1506                 memzero_explicit(kkey, ktp.keylen);
1507                 kfree(kkey);
1508                 if (rc)
1509                         break;
1510                 if (copy_to_user(utp, &ktp, sizeof(ktp)))
1511                         return -EFAULT;
1512                 break;
1513         }
1514         case PKEY_GENSECK2: {
1515                 struct pkey_genseck2 __user *ugs = (void __user *)arg;
1516                 size_t klen = KEYBLOBBUFSIZE;
1517                 struct pkey_genseck2 kgs;
1518                 struct pkey_apqn *apqns;
1519                 u8 *kkey;
1520
1521                 if (copy_from_user(&kgs, ugs, sizeof(kgs)))
1522                         return -EFAULT;
1523                 apqns = _copy_apqns_from_user(kgs.apqns, kgs.apqn_entries);
1524                 if (IS_ERR(apqns))
1525                         return PTR_ERR(apqns);
1526                 kkey = kzalloc(klen, GFP_KERNEL);
1527                 if (!kkey) {
1528                         kfree(apqns);
1529                         return -ENOMEM;
1530                 }
1531                 rc = pkey_genseckey2(apqns, kgs.apqn_entries,
1532                                      kgs.type, kgs.size, kgs.keygenflags,
1533                                      kkey, &klen);
1534                 pr_debug("%s pkey_genseckey2()=%d\n", __func__, rc);
1535                 kfree(apqns);
1536                 if (rc) {
1537                         kfree(kkey);
1538                         break;
1539                 }
1540                 if (kgs.key) {
1541                         if (kgs.keylen < klen) {
1542                                 kfree(kkey);
1543                                 return -EINVAL;
1544                         }
1545                         if (copy_to_user(kgs.key, kkey, klen)) {
1546                                 kfree(kkey);
1547                                 return -EFAULT;
1548                         }
1549                 }
1550                 kgs.keylen = klen;
1551                 if (copy_to_user(ugs, &kgs, sizeof(kgs)))
1552                         rc = -EFAULT;
1553                 kfree(kkey);
1554                 break;
1555         }
1556         case PKEY_CLR2SECK2: {
1557                 struct pkey_clr2seck2 __user *ucs = (void __user *)arg;
1558                 size_t klen = KEYBLOBBUFSIZE;
1559                 struct pkey_clr2seck2 kcs;
1560                 struct pkey_apqn *apqns;
1561                 u8 *kkey;
1562
1563                 if (copy_from_user(&kcs, ucs, sizeof(kcs)))
1564                         return -EFAULT;
1565                 apqns = _copy_apqns_from_user(kcs.apqns, kcs.apqn_entries);
1566                 if (IS_ERR(apqns))
1567                         return PTR_ERR(apqns);
1568                 kkey = kzalloc(klen, GFP_KERNEL);
1569                 if (!kkey) {
1570                         kfree(apqns);
1571                         return -ENOMEM;
1572                 }
1573                 rc = pkey_clr2seckey2(apqns, kcs.apqn_entries,
1574                                       kcs.type, kcs.size, kcs.keygenflags,
1575                                       kcs.clrkey.clrkey, kkey, &klen);
1576                 pr_debug("%s pkey_clr2seckey2()=%d\n", __func__, rc);
1577                 kfree(apqns);
1578                 if (rc) {
1579                         kfree(kkey);
1580                         break;
1581                 }
1582                 if (kcs.key) {
1583                         if (kcs.keylen < klen) {
1584                                 kfree(kkey);
1585                                 return -EINVAL;
1586                         }
1587                         if (copy_to_user(kcs.key, kkey, klen)) {
1588                                 kfree(kkey);
1589                                 return -EFAULT;
1590                         }
1591                 }
1592                 kcs.keylen = klen;
1593                 if (copy_to_user(ucs, &kcs, sizeof(kcs)))
1594                         rc = -EFAULT;
1595                 memzero_explicit(&kcs, sizeof(kcs));
1596                 kfree(kkey);
1597                 break;
1598         }
1599         case PKEY_VERIFYKEY2: {
1600                 struct pkey_verifykey2 __user *uvk = (void __user *)arg;
1601                 struct pkey_verifykey2 kvk;
1602                 u8 *kkey;
1603
1604                 if (copy_from_user(&kvk, uvk, sizeof(kvk)))
1605                         return -EFAULT;
1606                 kkey = _copy_key_from_user(kvk.key, kvk.keylen);
1607                 if (IS_ERR(kkey))
1608                         return PTR_ERR(kkey);
1609                 rc = pkey_verifykey2(kkey, kvk.keylen,
1610                                      &kvk.cardnr, &kvk.domain,
1611                                      &kvk.type, &kvk.size, &kvk.flags);
1612                 pr_debug("%s pkey_verifykey2()=%d\n", __func__, rc);
1613                 kfree(kkey);
1614                 if (rc)
1615                         break;
1616                 if (copy_to_user(uvk, &kvk, sizeof(kvk)))
1617                         return -EFAULT;
1618                 break;
1619         }
1620         case PKEY_KBLOB2PROTK2: {
1621                 struct pkey_kblob2pkey2 __user *utp = (void __user *)arg;
1622                 struct pkey_apqn *apqns = NULL;
1623                 struct pkey_kblob2pkey2 ktp;
1624                 u8 *kkey;
1625
1626                 if (copy_from_user(&ktp, utp, sizeof(ktp)))
1627                         return -EFAULT;
1628                 apqns = _copy_apqns_from_user(ktp.apqns, ktp.apqn_entries);
1629                 if (IS_ERR(apqns))
1630                         return PTR_ERR(apqns);
1631                 kkey = _copy_key_from_user(ktp.key, ktp.keylen);
1632                 if (IS_ERR(kkey)) {
1633                         kfree(apqns);
1634                         return PTR_ERR(kkey);
1635                 }
1636                 ktp.protkey.len = sizeof(ktp.protkey.protkey);
1637                 rc = pkey_keyblob2pkey2(apqns, ktp.apqn_entries,
1638                                         kkey, ktp.keylen,
1639                                         ktp.protkey.protkey, &ktp.protkey.len,
1640                                         &ktp.protkey.type);
1641                 pr_debug("%s pkey_keyblob2pkey2()=%d\n", __func__, rc);
1642                 kfree(apqns);
1643                 memzero_explicit(kkey, ktp.keylen);
1644                 kfree(kkey);
1645                 if (rc)
1646                         break;
1647                 if (copy_to_user(utp, &ktp, sizeof(ktp)))
1648                         return -EFAULT;
1649                 break;
1650         }
1651         case PKEY_APQNS4K: {
1652                 struct pkey_apqns4key __user *uak = (void __user *)arg;
1653                 struct pkey_apqn *apqns = NULL;
1654                 struct pkey_apqns4key kak;
1655                 size_t nr_apqns, len;
1656                 u8 *kkey;
1657
1658                 if (copy_from_user(&kak, uak, sizeof(kak)))
1659                         return -EFAULT;
1660                 nr_apqns = kak.apqn_entries;
1661                 if (nr_apqns) {
1662                         apqns = kmalloc_array(nr_apqns,
1663                                               sizeof(struct pkey_apqn),
1664                                               GFP_KERNEL);
1665                         if (!apqns)
1666                                 return -ENOMEM;
1667                 }
1668                 kkey = _copy_key_from_user(kak.key, kak.keylen);
1669                 if (IS_ERR(kkey)) {
1670                         kfree(apqns);
1671                         return PTR_ERR(kkey);
1672                 }
1673                 rc = pkey_apqns4key(kkey, kak.keylen, kak.flags,
1674                                     apqns, &nr_apqns);
1675                 pr_debug("%s pkey_apqns4key()=%d\n", __func__, rc);
1676                 kfree(kkey);
1677                 if (rc && rc != -ENOSPC) {
1678                         kfree(apqns);
1679                         break;
1680                 }
1681                 if (!rc && kak.apqns) {
1682                         if (nr_apqns > kak.apqn_entries) {
1683                                 kfree(apqns);
1684                                 return -EINVAL;
1685                         }
1686                         len = nr_apqns * sizeof(struct pkey_apqn);
1687                         if (len) {
1688                                 if (copy_to_user(kak.apqns, apqns, len)) {
1689                                         kfree(apqns);
1690                                         return -EFAULT;
1691                                 }
1692                         }
1693                 }
1694                 kak.apqn_entries = nr_apqns;
1695                 if (copy_to_user(uak, &kak, sizeof(kak)))
1696                         rc = -EFAULT;
1697                 kfree(apqns);
1698                 break;
1699         }
1700         case PKEY_APQNS4KT: {
1701                 struct pkey_apqns4keytype __user *uat = (void __user *)arg;
1702                 struct pkey_apqn *apqns = NULL;
1703                 struct pkey_apqns4keytype kat;
1704                 size_t nr_apqns, len;
1705
1706                 if (copy_from_user(&kat, uat, sizeof(kat)))
1707                         return -EFAULT;
1708                 nr_apqns = kat.apqn_entries;
1709                 if (nr_apqns) {
1710                         apqns = kmalloc_array(nr_apqns,
1711                                               sizeof(struct pkey_apqn),
1712                                               GFP_KERNEL);
1713                         if (!apqns)
1714                                 return -ENOMEM;
1715                 }
1716                 rc = pkey_apqns4keytype(kat.type, kat.cur_mkvp, kat.alt_mkvp,
1717                                         kat.flags, apqns, &nr_apqns);
1718                 pr_debug("%s pkey_apqns4keytype()=%d\n", __func__, rc);
1719                 if (rc && rc != -ENOSPC) {
1720                         kfree(apqns);
1721                         break;
1722                 }
1723                 if (!rc && kat.apqns) {
1724                         if (nr_apqns > kat.apqn_entries) {
1725                                 kfree(apqns);
1726                                 return -EINVAL;
1727                         }
1728                         len = nr_apqns * sizeof(struct pkey_apqn);
1729                         if (len) {
1730                                 if (copy_to_user(kat.apqns, apqns, len)) {
1731                                         kfree(apqns);
1732                                         return -EFAULT;
1733                                 }
1734                         }
1735                 }
1736                 kat.apqn_entries = nr_apqns;
1737                 if (copy_to_user(uat, &kat, sizeof(kat)))
1738                         rc = -EFAULT;
1739                 kfree(apqns);
1740                 break;
1741         }
1742         case PKEY_KBLOB2PROTK3: {
1743                 struct pkey_kblob2pkey3 __user *utp = (void __user *)arg;
1744                 u32 protkeylen = PROTKEYBLOBBUFSIZE;
1745                 struct pkey_apqn *apqns = NULL;
1746                 struct pkey_kblob2pkey3 ktp;
1747                 u8 *kkey, *protkey;
1748
1749                 if (copy_from_user(&ktp, utp, sizeof(ktp)))
1750                         return -EFAULT;
1751                 apqns = _copy_apqns_from_user(ktp.apqns, ktp.apqn_entries);
1752                 if (IS_ERR(apqns))
1753                         return PTR_ERR(apqns);
1754                 kkey = _copy_key_from_user(ktp.key, ktp.keylen);
1755                 if (IS_ERR(kkey)) {
1756                         kfree(apqns);
1757                         return PTR_ERR(kkey);
1758                 }
1759                 protkey = kmalloc(protkeylen, GFP_KERNEL);
1760                 if (!protkey) {
1761                         kfree(apqns);
1762                         kfree(kkey);
1763                         return -ENOMEM;
1764                 }
1765                 rc = pkey_keyblob2pkey3(apqns, ktp.apqn_entries,
1766                                         kkey, ktp.keylen,
1767                                         protkey, &protkeylen, &ktp.pkeytype);
1768                 pr_debug("%s pkey_keyblob2pkey3()=%d\n", __func__, rc);
1769                 kfree(apqns);
1770                 memzero_explicit(kkey, ktp.keylen);
1771                 kfree(kkey);
1772                 if (rc) {
1773                         kfree(protkey);
1774                         break;
1775                 }
1776                 if (ktp.pkey && ktp.pkeylen) {
1777                         if (protkeylen > ktp.pkeylen) {
1778                                 kfree(protkey);
1779                                 return -EINVAL;
1780                         }
1781                         if (copy_to_user(ktp.pkey, protkey, protkeylen)) {
1782                                 kfree(protkey);
1783                                 return -EFAULT;
1784                         }
1785                 }
1786                 kfree(protkey);
1787                 ktp.pkeylen = protkeylen;
1788                 if (copy_to_user(utp, &ktp, sizeof(ktp)))
1789                         return -EFAULT;
1790                 break;
1791         }
1792         default:
1793                 /* unknown/unsupported ioctl cmd */
1794                 return -ENOTTY;
1795         }
1796
1797         return rc;
1798 }
1799
1800 /*
1801  * Sysfs and file io operations
1802  */
1803
1804 /*
1805  * Sysfs attribute read function for all protected key binary attributes.
1806  * The implementation can not deal with partial reads, because a new random
1807  * protected key blob is generated with each read. In case of partial reads
1808  * (i.e. off != 0 or count < key blob size) -EINVAL is returned.
1809  */
1810 static ssize_t pkey_protkey_aes_attr_read(u32 keytype, bool is_xts, char *buf,
1811                                           loff_t off, size_t count)
1812 {
1813         struct protaeskeytoken protkeytoken;
1814         struct pkey_protkey protkey;
1815         int rc;
1816
1817         if (off != 0 || count < sizeof(protkeytoken))
1818                 return -EINVAL;
1819         if (is_xts)
1820                 if (count < 2 * sizeof(protkeytoken))
1821                         return -EINVAL;
1822
1823         memset(&protkeytoken, 0, sizeof(protkeytoken));
1824         protkeytoken.type = TOKTYPE_NON_CCA;
1825         protkeytoken.version = TOKVER_PROTECTED_KEY;
1826         protkeytoken.keytype = keytype;
1827
1828         protkey.len = sizeof(protkey.protkey);
1829         rc = pkey_genprotkey(protkeytoken.keytype,
1830                              protkey.protkey, &protkey.len, &protkey.type);
1831         if (rc)
1832                 return rc;
1833
1834         protkeytoken.len = protkey.len;
1835         memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len);
1836
1837         memcpy(buf, &protkeytoken, sizeof(protkeytoken));
1838
1839         if (is_xts) {
1840                 /* xts needs a second protected key, reuse protkey struct */
1841                 protkey.len = sizeof(protkey.protkey);
1842                 rc = pkey_genprotkey(protkeytoken.keytype,
1843                                      protkey.protkey, &protkey.len, &protkey.type);
1844                 if (rc)
1845                         return rc;
1846
1847                 protkeytoken.len = protkey.len;
1848                 memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len);
1849
1850                 memcpy(buf + sizeof(protkeytoken), &protkeytoken,
1851                        sizeof(protkeytoken));
1852
1853                 return 2 * sizeof(protkeytoken);
1854         }
1855
1856         return sizeof(protkeytoken);
1857 }
1858
1859 static ssize_t protkey_aes_128_read(struct file *filp,
1860                                     struct kobject *kobj,
1861                                     struct bin_attribute *attr,
1862                                     char *buf, loff_t off,
1863                                     size_t count)
1864 {
1865         return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf,
1866                                           off, count);
1867 }
1868
1869 static ssize_t protkey_aes_192_read(struct file *filp,
1870                                     struct kobject *kobj,
1871                                     struct bin_attribute *attr,
1872                                     char *buf, loff_t off,
1873                                     size_t count)
1874 {
1875         return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf,
1876                                           off, count);
1877 }
1878
1879 static ssize_t protkey_aes_256_read(struct file *filp,
1880                                     struct kobject *kobj,
1881                                     struct bin_attribute *attr,
1882                                     char *buf, loff_t off,
1883                                     size_t count)
1884 {
1885         return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf,
1886                                           off, count);
1887 }
1888
1889 static ssize_t protkey_aes_128_xts_read(struct file *filp,
1890                                         struct kobject *kobj,
1891                                         struct bin_attribute *attr,
1892                                         char *buf, loff_t off,
1893                                         size_t count)
1894 {
1895         return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf,
1896                                           off, count);
1897 }
1898
1899 static ssize_t protkey_aes_256_xts_read(struct file *filp,
1900                                         struct kobject *kobj,
1901                                         struct bin_attribute *attr,
1902                                         char *buf, loff_t off,
1903                                         size_t count)
1904 {
1905         return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf,
1906                                           off, count);
1907 }
1908
1909 static BIN_ATTR_RO(protkey_aes_128, sizeof(struct protaeskeytoken));
1910 static BIN_ATTR_RO(protkey_aes_192, sizeof(struct protaeskeytoken));
1911 static BIN_ATTR_RO(protkey_aes_256, sizeof(struct protaeskeytoken));
1912 static BIN_ATTR_RO(protkey_aes_128_xts, 2 * sizeof(struct protaeskeytoken));
1913 static BIN_ATTR_RO(protkey_aes_256_xts, 2 * sizeof(struct protaeskeytoken));
1914
1915 static struct bin_attribute *protkey_attrs[] = {
1916         &bin_attr_protkey_aes_128,
1917         &bin_attr_protkey_aes_192,
1918         &bin_attr_protkey_aes_256,
1919         &bin_attr_protkey_aes_128_xts,
1920         &bin_attr_protkey_aes_256_xts,
1921         NULL
1922 };
1923
1924 static struct attribute_group protkey_attr_group = {
1925         .name      = "protkey",
1926         .bin_attrs = protkey_attrs,
1927 };
1928
1929 /*
1930  * Sysfs attribute read function for all secure key ccadata binary attributes.
1931  * The implementation can not deal with partial reads, because a new random
1932  * protected key blob is generated with each read. In case of partial reads
1933  * (i.e. off != 0 or count < key blob size) -EINVAL is returned.
1934  */
1935 static ssize_t pkey_ccadata_aes_attr_read(u32 keytype, bool is_xts, char *buf,
1936                                           loff_t off, size_t count)
1937 {
1938         struct pkey_seckey *seckey = (struct pkey_seckey *)buf;
1939         int rc;
1940
1941         if (off != 0 || count < sizeof(struct secaeskeytoken))
1942                 return -EINVAL;
1943         if (is_xts)
1944                 if (count < 2 * sizeof(struct secaeskeytoken))
1945                         return -EINVAL;
1946
1947         rc = cca_genseckey(-1, -1, keytype, seckey->seckey);
1948         if (rc)
1949                 return rc;
1950
1951         if (is_xts) {
1952                 seckey++;
1953                 rc = cca_genseckey(-1, -1, keytype, seckey->seckey);
1954                 if (rc)
1955                         return rc;
1956
1957                 return 2 * sizeof(struct secaeskeytoken);
1958         }
1959
1960         return sizeof(struct secaeskeytoken);
1961 }
1962
1963 static ssize_t ccadata_aes_128_read(struct file *filp,
1964                                     struct kobject *kobj,
1965                                     struct bin_attribute *attr,
1966                                     char *buf, loff_t off,
1967                                     size_t count)
1968 {
1969         return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf,
1970                                           off, count);
1971 }
1972
1973 static ssize_t ccadata_aes_192_read(struct file *filp,
1974                                     struct kobject *kobj,
1975                                     struct bin_attribute *attr,
1976                                     char *buf, loff_t off,
1977                                     size_t count)
1978 {
1979         return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf,
1980                                           off, count);
1981 }
1982
1983 static ssize_t ccadata_aes_256_read(struct file *filp,
1984                                     struct kobject *kobj,
1985                                     struct bin_attribute *attr,
1986                                     char *buf, loff_t off,
1987                                     size_t count)
1988 {
1989         return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf,
1990                                           off, count);
1991 }
1992
1993 static ssize_t ccadata_aes_128_xts_read(struct file *filp,
1994                                         struct kobject *kobj,
1995                                         struct bin_attribute *attr,
1996                                         char *buf, loff_t off,
1997                                         size_t count)
1998 {
1999         return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf,
2000                                           off, count);
2001 }
2002
2003 static ssize_t ccadata_aes_256_xts_read(struct file *filp,
2004                                         struct kobject *kobj,
2005                                         struct bin_attribute *attr,
2006                                         char *buf, loff_t off,
2007                                         size_t count)
2008 {
2009         return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf,
2010                                           off, count);
2011 }
2012
2013 static BIN_ATTR_RO(ccadata_aes_128, sizeof(struct secaeskeytoken));
2014 static BIN_ATTR_RO(ccadata_aes_192, sizeof(struct secaeskeytoken));
2015 static BIN_ATTR_RO(ccadata_aes_256, sizeof(struct secaeskeytoken));
2016 static BIN_ATTR_RO(ccadata_aes_128_xts, 2 * sizeof(struct secaeskeytoken));
2017 static BIN_ATTR_RO(ccadata_aes_256_xts, 2 * sizeof(struct secaeskeytoken));
2018
2019 static struct bin_attribute *ccadata_attrs[] = {
2020         &bin_attr_ccadata_aes_128,
2021         &bin_attr_ccadata_aes_192,
2022         &bin_attr_ccadata_aes_256,
2023         &bin_attr_ccadata_aes_128_xts,
2024         &bin_attr_ccadata_aes_256_xts,
2025         NULL
2026 };
2027
2028 static struct attribute_group ccadata_attr_group = {
2029         .name      = "ccadata",
2030         .bin_attrs = ccadata_attrs,
2031 };
2032
2033 #define CCACIPHERTOKENSIZE      (sizeof(struct cipherkeytoken) + 80)
2034
2035 /*
2036  * Sysfs attribute read function for all secure key ccacipher binary attributes.
2037  * The implementation can not deal with partial reads, because a new random
2038  * secure key blob is generated with each read. In case of partial reads
2039  * (i.e. off != 0 or count < key blob size) -EINVAL is returned.
2040  */
2041 static ssize_t pkey_ccacipher_aes_attr_read(enum pkey_key_size keybits,
2042                                             bool is_xts, char *buf, loff_t off,
2043                                             size_t count)
2044 {
2045         size_t keysize = CCACIPHERTOKENSIZE;
2046         u32 nr_apqns, *apqns = NULL;
2047         int i, rc, card, dom;
2048
2049         if (off != 0 || count < CCACIPHERTOKENSIZE)
2050                 return -EINVAL;
2051         if (is_xts)
2052                 if (count < 2 * CCACIPHERTOKENSIZE)
2053                         return -EINVAL;
2054
2055         /* build a list of apqns able to generate an cipher key */
2056         rc = cca_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
2057                            ZCRYPT_CEX6, 0, 0, 0, 0);
2058         if (rc)
2059                 return rc;
2060
2061         memset(buf, 0, is_xts ? 2 * keysize : keysize);
2062
2063         /* simple try all apqns from the list */
2064         for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
2065                 card = apqns[i] >> 16;
2066                 dom = apqns[i] & 0xFFFF;
2067                 rc = cca_gencipherkey(card, dom, keybits, 0, buf, &keysize);
2068                 if (rc == 0)
2069                         break;
2070         }
2071         if (rc)
2072                 return rc;
2073
2074         if (is_xts) {
2075                 keysize = CCACIPHERTOKENSIZE;
2076                 buf += CCACIPHERTOKENSIZE;
2077                 rc = cca_gencipherkey(card, dom, keybits, 0, buf, &keysize);
2078                 if (rc == 0)
2079                         return 2 * CCACIPHERTOKENSIZE;
2080         }
2081
2082         return CCACIPHERTOKENSIZE;
2083 }
2084
2085 static ssize_t ccacipher_aes_128_read(struct file *filp,
2086                                       struct kobject *kobj,
2087                                       struct bin_attribute *attr,
2088                                       char *buf, loff_t off,
2089                                       size_t count)
2090 {
2091         return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_128, false, buf,
2092                                             off, count);
2093 }
2094
2095 static ssize_t ccacipher_aes_192_read(struct file *filp,
2096                                       struct kobject *kobj,
2097                                       struct bin_attribute *attr,
2098                                       char *buf, loff_t off,
2099                                       size_t count)
2100 {
2101         return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_192, false, buf,
2102                                             off, count);
2103 }
2104
2105 static ssize_t ccacipher_aes_256_read(struct file *filp,
2106                                       struct kobject *kobj,
2107                                       struct bin_attribute *attr,
2108                                       char *buf, loff_t off,
2109                                       size_t count)
2110 {
2111         return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_256, false, buf,
2112                                             off, count);
2113 }
2114
2115 static ssize_t ccacipher_aes_128_xts_read(struct file *filp,
2116                                           struct kobject *kobj,
2117                                           struct bin_attribute *attr,
2118                                           char *buf, loff_t off,
2119                                           size_t count)
2120 {
2121         return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_128, true, buf,
2122                                             off, count);
2123 }
2124
2125 static ssize_t ccacipher_aes_256_xts_read(struct file *filp,
2126                                           struct kobject *kobj,
2127                                           struct bin_attribute *attr,
2128                                           char *buf, loff_t off,
2129                                           size_t count)
2130 {
2131         return pkey_ccacipher_aes_attr_read(PKEY_SIZE_AES_256, true, buf,
2132                                             off, count);
2133 }
2134
2135 static BIN_ATTR_RO(ccacipher_aes_128, CCACIPHERTOKENSIZE);
2136 static BIN_ATTR_RO(ccacipher_aes_192, CCACIPHERTOKENSIZE);
2137 static BIN_ATTR_RO(ccacipher_aes_256, CCACIPHERTOKENSIZE);
2138 static BIN_ATTR_RO(ccacipher_aes_128_xts, 2 * CCACIPHERTOKENSIZE);
2139 static BIN_ATTR_RO(ccacipher_aes_256_xts, 2 * CCACIPHERTOKENSIZE);
2140
2141 static struct bin_attribute *ccacipher_attrs[] = {
2142         &bin_attr_ccacipher_aes_128,
2143         &bin_attr_ccacipher_aes_192,
2144         &bin_attr_ccacipher_aes_256,
2145         &bin_attr_ccacipher_aes_128_xts,
2146         &bin_attr_ccacipher_aes_256_xts,
2147         NULL
2148 };
2149
2150 static struct attribute_group ccacipher_attr_group = {
2151         .name      = "ccacipher",
2152         .bin_attrs = ccacipher_attrs,
2153 };
2154
2155 /*
2156  * Sysfs attribute read function for all ep11 aes key binary attributes.
2157  * The implementation can not deal with partial reads, because a new random
2158  * secure key blob is generated with each read. In case of partial reads
2159  * (i.e. off != 0 or count < key blob size) -EINVAL is returned.
2160  * This function and the sysfs attributes using it provide EP11 key blobs
2161  * padded to the upper limit of MAXEP11AESKEYBLOBSIZE which is currently
2162  * 336 bytes.
2163  */
2164 static ssize_t pkey_ep11_aes_attr_read(enum pkey_key_size keybits,
2165                                        bool is_xts, char *buf, loff_t off,
2166                                        size_t count)
2167 {
2168         size_t keysize = MAXEP11AESKEYBLOBSIZE;
2169         u32 nr_apqns, *apqns = NULL;
2170         int i, rc, card, dom;
2171
2172         if (off != 0 || count < MAXEP11AESKEYBLOBSIZE)
2173                 return -EINVAL;
2174         if (is_xts)
2175                 if (count < 2 * MAXEP11AESKEYBLOBSIZE)
2176                         return -EINVAL;
2177
2178         /* build a list of apqns able to generate an cipher key */
2179         rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
2180                             ZCRYPT_CEX7,
2181                             ap_is_se_guest() ? EP11_API_V6 : EP11_API_V4,
2182                             NULL);
2183         if (rc)
2184                 return rc;
2185
2186         memset(buf, 0, is_xts ? 2 * keysize : keysize);
2187
2188         /* simple try all apqns from the list */
2189         for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
2190                 card = apqns[i] >> 16;
2191                 dom = apqns[i] & 0xFFFF;
2192                 rc = ep11_genaeskey(card, dom, keybits, 0, buf, &keysize,
2193                                     PKEY_TYPE_EP11_AES);
2194                 if (rc == 0)
2195                         break;
2196         }
2197         if (rc)
2198                 return rc;
2199
2200         if (is_xts) {
2201                 keysize = MAXEP11AESKEYBLOBSIZE;
2202                 buf += MAXEP11AESKEYBLOBSIZE;
2203                 rc = ep11_genaeskey(card, dom, keybits, 0, buf, &keysize,
2204                                     PKEY_TYPE_EP11_AES);
2205                 if (rc == 0)
2206                         return 2 * MAXEP11AESKEYBLOBSIZE;
2207         }
2208
2209         return MAXEP11AESKEYBLOBSIZE;
2210 }
2211
2212 static ssize_t ep11_aes_128_read(struct file *filp,
2213                                  struct kobject *kobj,
2214                                  struct bin_attribute *attr,
2215                                  char *buf, loff_t off,
2216                                  size_t count)
2217 {
2218         return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_128, false, buf,
2219                                        off, count);
2220 }
2221
2222 static ssize_t ep11_aes_192_read(struct file *filp,
2223                                  struct kobject *kobj,
2224                                  struct bin_attribute *attr,
2225                                  char *buf, loff_t off,
2226                                  size_t count)
2227 {
2228         return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_192, false, buf,
2229                                        off, count);
2230 }
2231
2232 static ssize_t ep11_aes_256_read(struct file *filp,
2233                                  struct kobject *kobj,
2234                                  struct bin_attribute *attr,
2235                                  char *buf, loff_t off,
2236                                  size_t count)
2237 {
2238         return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_256, false, buf,
2239                                        off, count);
2240 }
2241
2242 static ssize_t ep11_aes_128_xts_read(struct file *filp,
2243                                      struct kobject *kobj,
2244                                      struct bin_attribute *attr,
2245                                      char *buf, loff_t off,
2246                                      size_t count)
2247 {
2248         return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_128, true, buf,
2249                                        off, count);
2250 }
2251
2252 static ssize_t ep11_aes_256_xts_read(struct file *filp,
2253                                      struct kobject *kobj,
2254                                      struct bin_attribute *attr,
2255                                      char *buf, loff_t off,
2256                                      size_t count)
2257 {
2258         return pkey_ep11_aes_attr_read(PKEY_SIZE_AES_256, true, buf,
2259                                        off, count);
2260 }
2261
2262 static BIN_ATTR_RO(ep11_aes_128, MAXEP11AESKEYBLOBSIZE);
2263 static BIN_ATTR_RO(ep11_aes_192, MAXEP11AESKEYBLOBSIZE);
2264 static BIN_ATTR_RO(ep11_aes_256, MAXEP11AESKEYBLOBSIZE);
2265 static BIN_ATTR_RO(ep11_aes_128_xts, 2 * MAXEP11AESKEYBLOBSIZE);
2266 static BIN_ATTR_RO(ep11_aes_256_xts, 2 * MAXEP11AESKEYBLOBSIZE);
2267
2268 static struct bin_attribute *ep11_attrs[] = {
2269         &bin_attr_ep11_aes_128,
2270         &bin_attr_ep11_aes_192,
2271         &bin_attr_ep11_aes_256,
2272         &bin_attr_ep11_aes_128_xts,
2273         &bin_attr_ep11_aes_256_xts,
2274         NULL
2275 };
2276
2277 static struct attribute_group ep11_attr_group = {
2278         .name      = "ep11",
2279         .bin_attrs = ep11_attrs,
2280 };
2281
2282 static const struct attribute_group *pkey_attr_groups[] = {
2283         &protkey_attr_group,
2284         &ccadata_attr_group,
2285         &ccacipher_attr_group,
2286         &ep11_attr_group,
2287         NULL,
2288 };
2289
2290 static const struct file_operations pkey_fops = {
2291         .owner          = THIS_MODULE,
2292         .open           = nonseekable_open,
2293         .llseek         = no_llseek,
2294         .unlocked_ioctl = pkey_unlocked_ioctl,
2295 };
2296
2297 static struct miscdevice pkey_dev = {
2298         .name   = "pkey",
2299         .minor  = MISC_DYNAMIC_MINOR,
2300         .mode   = 0666,
2301         .fops   = &pkey_fops,
2302         .groups = pkey_attr_groups,
2303 };
2304
2305 /*
2306  * Module init
2307  */
2308 static int __init pkey_init(void)
2309 {
2310         cpacf_mask_t func_mask;
2311
2312         /*
2313          * The pckmo instruction should be available - even if we don't
2314          * actually invoke it. This instruction comes with MSA 3 which
2315          * is also the minimum level for the kmc instructions which
2316          * are able to work with protected keys.
2317          */
2318         if (!cpacf_query(CPACF_PCKMO, &func_mask))
2319                 return -ENODEV;
2320
2321         /* check for kmc instructions available */
2322         if (!cpacf_query(CPACF_KMC, &func_mask))
2323                 return -ENODEV;
2324         if (!cpacf_test_func(&func_mask, CPACF_KMC_PAES_128) ||
2325             !cpacf_test_func(&func_mask, CPACF_KMC_PAES_192) ||
2326             !cpacf_test_func(&func_mask, CPACF_KMC_PAES_256))
2327                 return -ENODEV;
2328
2329         pkey_debug_init();
2330
2331         return misc_register(&pkey_dev);
2332 }
2333
2334 /*
2335  * Module exit
2336  */
2337 static void __exit pkey_exit(void)
2338 {
2339         misc_deregister(&pkey_dev);
2340         pkey_debug_exit();
2341 }
2342
2343 module_cpu_feature_match(S390_CPU_FEATURE_MSA, pkey_init);
2344 module_exit(pkey_exit);