arch/s390/crypto/des_s390.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Cryptographic API.
   4  *
   5  * s390 implementation of the DES Cipher Algorithm.
   6  *
   7  * Copyright IBM Corp. 2003, 2011
   8  * Author(s): Thomas Spatzier
   9  *            Jan Glauber (jan.glauber@de.ibm.com)
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/cpufeature.h>
  15 #include <linux/crypto.h>
  16 #include <linux/fips.h>
  17 #include <linux/mutex.h>
  18 #include <crypto/algapi.h>
  19 #include <crypto/des.h>
  20 #include <asm/cpacf.h>
  21
  22 #define DES3_KEY_SIZE   (3 * DES_KEY_SIZE)
  23
  24 static u8 *ctrblk;
  25 static DEFINE_MUTEX(ctrblk_lock);
  26
  27 static cpacf_mask_t km_functions, kmc_functions, kmctr_functions;
  28
  29 struct s390_des_ctx {
  30         u8 iv[DES_BLOCK_SIZE];
  31         u8 key[DES3_KEY_SIZE];
  32 };
  33
  34 static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
  35                       unsigned int key_len)
  36 {
  37         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
  38         u32 tmp[DES_EXPKEY_WORDS];
  39
  40         /* check for weak keys */
  41         if (!des_ekey(tmp, key) &&
  42             (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) {
  43                 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
  44                 return -EINVAL;
  45         }
  46
  47         memcpy(ctx->key, key, key_len);
  48         return 0;
  49 }
  50
  51 static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
  52 {
  53         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
  54
  55         cpacf_km(CPACF_KM_DEA, ctx->key, out, in, DES_BLOCK_SIZE);
  56 }
  57
  58 static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
  59 {
  60         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
  61
  62         cpacf_km(CPACF_KM_DEA | CPACF_DECRYPT,
  63                  ctx->key, out, in, DES_BLOCK_SIZE);
  64 }
  65
  66 static struct crypto_alg des_alg = {
  67         .cra_name               =       "des",
  68         .cra_driver_name        =       "des-s390",
  69         .cra_priority           =       300,
  70         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
  71         .cra_blocksize          =       DES_BLOCK_SIZE,
  72         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
  73         .cra_module             =       THIS_MODULE,
  74         .cra_u                  =       {
  75                 .cipher = {
  76                         .cia_min_keysize        =       DES_KEY_SIZE,
  77                         .cia_max_keysize        =       DES_KEY_SIZE,
  78                         .cia_setkey             =       des_setkey,
  79                         .cia_encrypt            =       des_encrypt,
  80                         .cia_decrypt            =       des_decrypt,
  81                 }
  82         }
  83 };
  84
  85 static int ecb_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
  86                             struct blkcipher_walk *walk)
  87 {
  88         struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
  89         unsigned int nbytes, n;
  90         int ret;
  91
  92         ret = blkcipher_walk_virt(desc, walk);
  93         while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
  94                 /* only use complete blocks */
  95                 n = nbytes & ~(DES_BLOCK_SIZE - 1);
  96                 cpacf_km(fc, ctx->key, walk->dst.virt.addr,
  97                          walk->src.virt.addr, n);
  98                 ret = blkcipher_walk_done(desc, walk, nbytes - n);
  99         }
 100         return ret;
 101 }
 102
 103 static int cbc_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
 104                             struct blkcipher_walk *walk)
 105 {
 106         struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 107         unsigned int nbytes, n;
 108         int ret;
 109         struct {
 110                 u8 iv[DES_BLOCK_SIZE];
 111                 u8 key[DES3_KEY_SIZE];
 112         } param;
 113
 114         ret = blkcipher_walk_virt(desc, walk);
 115         memcpy(param.iv, walk->iv, DES_BLOCK_SIZE);
 116         memcpy(param.key, ctx->key, DES3_KEY_SIZE);
 117         while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
 118                 /* only use complete blocks */
 119                 n = nbytes & ~(DES_BLOCK_SIZE - 1);
 120                 cpacf_kmc(fc, &param, walk->dst.virt.addr,
 121                           walk->src.virt.addr, n);
 122                 ret = blkcipher_walk_done(desc, walk, nbytes - n);
 123         }
 124         memcpy(walk->iv, param.iv, DES_BLOCK_SIZE);
 125         return ret;
 126 }
 127
 128 static int ecb_des_encrypt(struct blkcipher_desc *desc,
 129                            struct scatterlist *dst, struct scatterlist *src,
 130                            unsigned int nbytes)
 131 {
 132         struct blkcipher_walk walk;
 133
 134         blkcipher_walk_init(&walk, dst, src, nbytes);
 135         return ecb_desall_crypt(desc, CPACF_KM_DEA, &walk);
 136 }
 137
 138 static int ecb_des_decrypt(struct blkcipher_desc *desc,
 139                            struct scatterlist *dst, struct scatterlist *src,
 140                            unsigned int nbytes)
 141 {
 142         struct blkcipher_walk walk;
 143
 144         blkcipher_walk_init(&walk, dst, src, nbytes);
 145         return ecb_desall_crypt(desc, CPACF_KM_DEA | CPACF_DECRYPT, &walk);
 146 }
 147
 148 static struct crypto_alg ecb_des_alg = {
 149         .cra_name               =       "ecb(des)",
 150         .cra_driver_name        =       "ecb-des-s390",
 151         .cra_priority           =       400,    /* combo: des + ecb */
 152         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 153         .cra_blocksize          =       DES_BLOCK_SIZE,
 154         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 155         .cra_type               =       &crypto_blkcipher_type,
 156         .cra_module             =       THIS_MODULE,
 157         .cra_u                  =       {
 158                 .blkcipher = {
 159                         .min_keysize            =       DES_KEY_SIZE,
 160                         .max_keysize            =       DES_KEY_SIZE,
 161                         .setkey                 =       des_setkey,
 162                         .encrypt                =       ecb_des_encrypt,
 163                         .decrypt                =       ecb_des_decrypt,
 164                 }
 165         }
 166 };
 167
 168 static int cbc_des_encrypt(struct blkcipher_desc *desc,
 169                            struct scatterlist *dst, struct scatterlist *src,
 170                            unsigned int nbytes)
 171 {
 172         struct blkcipher_walk walk;
 173
 174         blkcipher_walk_init(&walk, dst, src, nbytes);
 175         return cbc_desall_crypt(desc, CPACF_KMC_DEA, &walk);
 176 }
 177
 178 static int cbc_des_decrypt(struct blkcipher_desc *desc,
 179                            struct scatterlist *dst, struct scatterlist *src,
 180                            unsigned int nbytes)
 181 {
 182         struct blkcipher_walk walk;
 183
 184         blkcipher_walk_init(&walk, dst, src, nbytes);
 185         return cbc_desall_crypt(desc, CPACF_KMC_DEA | CPACF_DECRYPT, &walk);
 186 }
 187
 188 static struct crypto_alg cbc_des_alg = {
 189         .cra_name               =       "cbc(des)",
 190         .cra_driver_name        =       "cbc-des-s390",
 191         .cra_priority           =       400,    /* combo: des + cbc */
 192         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 193         .cra_blocksize          =       DES_BLOCK_SIZE,
 194         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 195         .cra_type               =       &crypto_blkcipher_type,
 196         .cra_module             =       THIS_MODULE,
 197         .cra_u                  =       {
 198                 .blkcipher = {
 199                         .min_keysize            =       DES_KEY_SIZE,
 200                         .max_keysize            =       DES_KEY_SIZE,
 201                         .ivsize                 =       DES_BLOCK_SIZE,
 202                         .setkey                 =       des_setkey,
 203                         .encrypt                =       cbc_des_encrypt,
 204                         .decrypt                =       cbc_des_decrypt,
 205                 }
 206         }
 207 };
 208
 209 /*
 210  * RFC2451:
 211  *
 212  *   For DES-EDE3, there is no known need to reject weak or
 213  *   complementation keys.  Any weakness is obviated by the use of
 214  *   multiple keys.
 215  *
 216  *   However, if the first two or last two independent 64-bit keys are
 217  *   equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
 218  *   same as DES.  Implementers MUST reject keys that exhibit this
 219  *   property.
 220  *
 221  *   In fips mode additinally check for all 3 keys are unique.
 222  *
 223  */
 224 static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
 225                        unsigned int key_len)
 226 {
 227         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 228         int err;
 229
 230         err = __des3_verify_key(&tfm->crt_flags, key);
 231         if (unlikely(err))
 232                 return err;
 233
 234         memcpy(ctx->key, key, key_len);
 235         return 0;
 236 }
 237
 238 static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 239 {
 240         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 241
 242         cpacf_km(CPACF_KM_TDEA_192, ctx->key, dst, src, DES_BLOCK_SIZE);
 243 }
 244
 245 static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 246 {
 247         struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
 248
 249         cpacf_km(CPACF_KM_TDEA_192 | CPACF_DECRYPT,
 250                  ctx->key, dst, src, DES_BLOCK_SIZE);
 251 }
 252
 253 static struct crypto_alg des3_alg = {
 254         .cra_name               =       "des3_ede",
 255         .cra_driver_name        =       "des3_ede-s390",
 256         .cra_priority           =       300,
 257         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 258         .cra_blocksize          =       DES_BLOCK_SIZE,
 259         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 260         .cra_module             =       THIS_MODULE,
 261         .cra_u                  =       {
 262                 .cipher = {
 263                         .cia_min_keysize        =       DES3_KEY_SIZE,
 264                         .cia_max_keysize        =       DES3_KEY_SIZE,
 265                         .cia_setkey             =       des3_setkey,
 266                         .cia_encrypt            =       des3_encrypt,
 267                         .cia_decrypt            =       des3_decrypt,
 268                 }
 269         }
 270 };
 271
 272 static int ecb_des3_encrypt(struct blkcipher_desc *desc,
 273                             struct scatterlist *dst, struct scatterlist *src,
 274                             unsigned int nbytes)
 275 {
 276         struct blkcipher_walk walk;
 277
 278         blkcipher_walk_init(&walk, dst, src, nbytes);
 279         return ecb_desall_crypt(desc, CPACF_KM_TDEA_192, &walk);
 280 }
 281
 282 static int ecb_des3_decrypt(struct blkcipher_desc *desc,
 283                             struct scatterlist *dst, struct scatterlist *src,
 284                             unsigned int nbytes)
 285 {
 286         struct blkcipher_walk walk;
 287
 288         blkcipher_walk_init(&walk, dst, src, nbytes);
 289         return ecb_desall_crypt(desc, CPACF_KM_TDEA_192 | CPACF_DECRYPT,
 290                                 &walk);
 291 }
 292
 293 static struct crypto_alg ecb_des3_alg = {
 294         .cra_name               =       "ecb(des3_ede)",
 295         .cra_driver_name        =       "ecb-des3_ede-s390",
 296         .cra_priority           =       400,    /* combo: des3 + ecb */
 297         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 298         .cra_blocksize          =       DES_BLOCK_SIZE,
 299         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 300         .cra_type               =       &crypto_blkcipher_type,
 301         .cra_module             =       THIS_MODULE,
 302         .cra_u                  =       {
 303                 .blkcipher = {
 304                         .min_keysize            =       DES3_KEY_SIZE,
 305                         .max_keysize            =       DES3_KEY_SIZE,
 306                         .setkey                 =       des3_setkey,
 307                         .encrypt                =       ecb_des3_encrypt,
 308                         .decrypt                =       ecb_des3_decrypt,
 309                 }
 310         }
 311 };
 312
 313 static int cbc_des3_encrypt(struct blkcipher_desc *desc,
 314                             struct scatterlist *dst, struct scatterlist *src,
 315                             unsigned int nbytes)
 316 {
 317         struct blkcipher_walk walk;
 318
 319         blkcipher_walk_init(&walk, dst, src, nbytes);
 320         return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192, &walk);
 321 }
 322
 323 static int cbc_des3_decrypt(struct blkcipher_desc *desc,
 324                             struct scatterlist *dst, struct scatterlist *src,
 325                             unsigned int nbytes)
 326 {
 327         struct blkcipher_walk walk;
 328
 329         blkcipher_walk_init(&walk, dst, src, nbytes);
 330         return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192 | CPACF_DECRYPT,
 331                                 &walk);
 332 }
 333
 334 static struct crypto_alg cbc_des3_alg = {
 335         .cra_name               =       "cbc(des3_ede)",
 336         .cra_driver_name        =       "cbc-des3_ede-s390",
 337         .cra_priority           =       400,    /* combo: des3 + cbc */
 338         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 339         .cra_blocksize          =       DES_BLOCK_SIZE,
 340         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 341         .cra_type               =       &crypto_blkcipher_type,
 342         .cra_module             =       THIS_MODULE,
 343         .cra_u                  =       {
 344                 .blkcipher = {
 345                         .min_keysize            =       DES3_KEY_SIZE,
 346                         .max_keysize            =       DES3_KEY_SIZE,
 347                         .ivsize                 =       DES_BLOCK_SIZE,
 348                         .setkey                 =       des3_setkey,
 349                         .encrypt                =       cbc_des3_encrypt,
 350                         .decrypt                =       cbc_des3_decrypt,
 351                 }
 352         }
 353 };
 354
 355 static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
 356 {
 357         unsigned int i, n;
 358
 359         /* align to block size, max. PAGE_SIZE */
 360         n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1);
 361         memcpy(ctrptr, iv, DES_BLOCK_SIZE);
 362         for (i = (n / DES_BLOCK_SIZE) - 1; i > 0; i--) {
 363                 memcpy(ctrptr + DES_BLOCK_SIZE, ctrptr, DES_BLOCK_SIZE);
 364                 crypto_inc(ctrptr + DES_BLOCK_SIZE, DES_BLOCK_SIZE);
 365                 ctrptr += DES_BLOCK_SIZE;
 366         }
 367         return n;
 368 }
 369
 370 static int ctr_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
 371                             struct blkcipher_walk *walk)
 372 {
 373         struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 374         u8 buf[DES_BLOCK_SIZE], *ctrptr;
 375         unsigned int n, nbytes;
 376         int ret, locked;
 377
 378         locked = mutex_trylock(&ctrblk_lock);
 379
 380         ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
 381         while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
 382                 n = DES_BLOCK_SIZE;
 383                 if (nbytes >= 2*DES_BLOCK_SIZE && locked)
 384                         n = __ctrblk_init(ctrblk, walk->iv, nbytes);
 385                 ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk->iv;
 386                 cpacf_kmctr(fc, ctx->key, walk->dst.virt.addr,
 387                             walk->src.virt.addr, n, ctrptr);
 388                 if (ctrptr == ctrblk)
 389                         memcpy(walk->iv, ctrptr + n - DES_BLOCK_SIZE,
 390                                 DES_BLOCK_SIZE);
 391                 crypto_inc(walk->iv, DES_BLOCK_SIZE);
 392                 ret = blkcipher_walk_done(desc, walk, nbytes - n);
 393         }
 394         if (locked)
 395                 mutex_unlock(&ctrblk_lock);
 396         /* final block may be < DES_BLOCK_SIZE, copy only nbytes */
 397         if (nbytes) {
 398                 cpacf_kmctr(fc, ctx->key, buf, walk->src.virt.addr,
 399                             DES_BLOCK_SIZE, walk->iv);
 400                 memcpy(walk->dst.virt.addr, buf, nbytes);
 401                 crypto_inc(walk->iv, DES_BLOCK_SIZE);
 402                 ret = blkcipher_walk_done(desc, walk, 0);
 403         }
 404         return ret;
 405 }
 406
 407 static int ctr_des_encrypt(struct blkcipher_desc *desc,
 408                            struct scatterlist *dst, struct scatterlist *src,
 409                            unsigned int nbytes)
 410 {
 411         struct blkcipher_walk walk;
 412
 413         blkcipher_walk_init(&walk, dst, src, nbytes);
 414         return ctr_desall_crypt(desc, CPACF_KMCTR_DEA, &walk);
 415 }
 416
 417 static int ctr_des_decrypt(struct blkcipher_desc *desc,
 418                            struct scatterlist *dst, struct scatterlist *src,
 419                            unsigned int nbytes)
 420 {
 421         struct blkcipher_walk walk;
 422
 423         blkcipher_walk_init(&walk, dst, src, nbytes);
 424         return ctr_desall_crypt(desc, CPACF_KMCTR_DEA | CPACF_DECRYPT, &walk);
 425 }
 426
 427 static struct crypto_alg ctr_des_alg = {
 428         .cra_name               =       "ctr(des)",
 429         .cra_driver_name        =       "ctr-des-s390",
 430         .cra_priority           =       400,    /* combo: des + ctr */
 431         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 432         .cra_blocksize          =       1,
 433         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 434         .cra_type               =       &crypto_blkcipher_type,
 435         .cra_module             =       THIS_MODULE,
 436         .cra_u                  =       {
 437                 .blkcipher = {
 438                         .min_keysize            =       DES_KEY_SIZE,
 439                         .max_keysize            =       DES_KEY_SIZE,
 440                         .ivsize                 =       DES_BLOCK_SIZE,
 441                         .setkey                 =       des_setkey,
 442                         .encrypt                =       ctr_des_encrypt,
 443                         .decrypt                =       ctr_des_decrypt,
 444                 }
 445         }
 446 };
 447
 448 static int ctr_des3_encrypt(struct blkcipher_desc *desc,
 449                             struct scatterlist *dst, struct scatterlist *src,
 450                             unsigned int nbytes)
 451 {
 452         struct blkcipher_walk walk;
 453
 454         blkcipher_walk_init(&walk, dst, src, nbytes);
 455         return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192, &walk);
 456 }
 457
 458 static int ctr_des3_decrypt(struct blkcipher_desc *desc,
 459                             struct scatterlist *dst, struct scatterlist *src,
 460                             unsigned int nbytes)
 461 {
 462         struct blkcipher_walk walk;
 463
 464         blkcipher_walk_init(&walk, dst, src, nbytes);
 465         return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192 | CPACF_DECRYPT,
 466                                 &walk);
 467 }
 468
 469 static struct crypto_alg ctr_des3_alg = {
 470         .cra_name               =       "ctr(des3_ede)",
 471         .cra_driver_name        =       "ctr-des3_ede-s390",
 472         .cra_priority           =       400,    /* combo: des3 + ede */
 473         .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
 474         .cra_blocksize          =       1,
 475         .cra_ctxsize            =       sizeof(struct s390_des_ctx),
 476         .cra_type               =       &crypto_blkcipher_type,
 477         .cra_module             =       THIS_MODULE,
 478         .cra_u                  =       {
 479                 .blkcipher = {
 480                         .min_keysize            =       DES3_KEY_SIZE,
 481                         .max_keysize            =       DES3_KEY_SIZE,
 482                         .ivsize                 =       DES_BLOCK_SIZE,
 483                         .setkey                 =       des3_setkey,
 484                         .encrypt                =       ctr_des3_encrypt,
 485                         .decrypt                =       ctr_des3_decrypt,
 486                 }
 487         }
 488 };
 489
 490 static struct crypto_alg *des_s390_algs_ptr[8];
 491 static int des_s390_algs_num;
 492
 493 static int des_s390_register_alg(struct crypto_alg *alg)
 494 {
 495         int ret;
 496
 497         ret = crypto_register_alg(alg);
 498         if (!ret)
 499                 des_s390_algs_ptr[des_s390_algs_num++] = alg;
 500         return ret;
 501 }
 502
 503 static void des_s390_exit(void)
 504 {
 505         while (des_s390_algs_num--)
 506                 crypto_unregister_alg(des_s390_algs_ptr[des_s390_algs_num]);
 507         if (ctrblk)
 508                 free_page((unsigned long) ctrblk);
 509 }
 510
 511 static int __init des_s390_init(void)
 512 {
 513         int ret;
 514
 515         /* Query available functions for KM, KMC and KMCTR */
 516         cpacf_query(CPACF_KM, &km_functions);
 517         cpacf_query(CPACF_KMC, &kmc_functions);
 518         cpacf_query(CPACF_KMCTR, &kmctr_functions);
 519
 520         if (cpacf_test_func(&km_functions, CPACF_KM_DEA)) {
 521                 ret = des_s390_register_alg(&des_alg);
 522                 if (ret)
 523                         goto out_err;
 524                 ret = des_s390_register_alg(&ecb_des_alg);
 525                 if (ret)
 526                         goto out_err;
 527         }
 528         if (cpacf_test_func(&kmc_functions, CPACF_KMC_DEA)) {
 529                 ret = des_s390_register_alg(&cbc_des_alg);
 530                 if (ret)
 531                         goto out_err;
 532         }
 533         if (cpacf_test_func(&km_functions, CPACF_KM_TDEA_192)) {
 534                 ret = des_s390_register_alg(&des3_alg);
 535                 if (ret)
 536                         goto out_err;
 537                 ret = des_s390_register_alg(&ecb_des3_alg);
 538                 if (ret)
 539                         goto out_err;
 540         }
 541         if (cpacf_test_func(&kmc_functions, CPACF_KMC_TDEA_192)) {
 542                 ret = des_s390_register_alg(&cbc_des3_alg);
 543                 if (ret)
 544                         goto out_err;
 545         }
 546
 547         if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA) ||
 548             cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) {
 549                 ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
 550                 if (!ctrblk) {
 551                         ret = -ENOMEM;
 552                         goto out_err;
 553                 }
 554         }
 555
 556         if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA)) {
 557                 ret = des_s390_register_alg(&ctr_des_alg);
 558                 if (ret)
 559                         goto out_err;
 560         }
 561         if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) {
 562                 ret = des_s390_register_alg(&ctr_des3_alg);
 563                 if (ret)
 564                         goto out_err;
 565         }
 566
 567         return 0;
 568 out_err:
 569         des_s390_exit();
 570         return ret;
 571 }
 572
 573 module_cpu_feature_match(MSA, des_s390_init);
 574 module_exit(des_s390_exit);
 575
 576 MODULE_ALIAS_CRYPTO("des");
 577 MODULE_ALIAS_CRYPTO("des3_ede");
 578
 579 MODULE_LICENSE("GPL");
 580 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");