| 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * s390 implementation of the DES Cipher Algorithm. |
| 5 | * |
| 6 | * Copyright IBM Corp. 2003, 2011 |
| 7 | * Author(s): Thomas Spatzier |
| 8 | * Jan Glauber (jan.glauber@de.ibm.com) |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/cpufeature.h> |
| 20 | #include <linux/crypto.h> |
| 21 | #include <crypto/algapi.h> |
| 22 | #include <crypto/des.h> |
| 23 | #include <asm/cpacf.h> |
| 24 | |
| 25 | #define DES3_KEY_SIZE (3 * DES_KEY_SIZE) |
| 26 | |
| 27 | static u8 *ctrblk; |
| 28 | static DEFINE_SPINLOCK(ctrblk_lock); |
| 29 | |
| 30 | static cpacf_mask_t km_functions, kmc_functions, kmctr_functions; |
| 31 | |
| 32 | struct s390_des_ctx { |
| 33 | u8 iv[DES_BLOCK_SIZE]; |
| 34 | u8 key[DES3_KEY_SIZE]; |
| 35 | }; |
| 36 | |
| 37 | static int des_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 38 | unsigned int key_len) |
| 39 | { |
| 40 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 41 | u32 tmp[DES_EXPKEY_WORDS]; |
| 42 | |
| 43 | /* check for weak keys */ |
| 44 | if (!des_ekey(tmp, key) && |
| 45 | (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { |
| 46 | tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; |
| 47 | return -EINVAL; |
| 48 | } |
| 49 | |
| 50 | memcpy(ctx->key, key, key_len); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 55 | { |
| 56 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 57 | |
| 58 | cpacf_km(CPACF_KM_DEA, ctx->key, out, in, DES_BLOCK_SIZE); |
| 59 | } |
| 60 | |
| 61 | static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 62 | { |
| 63 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 64 | |
| 65 | cpacf_km(CPACF_KM_DEA | CPACF_DECRYPT, |
| 66 | ctx->key, out, in, DES_BLOCK_SIZE); |
| 67 | } |
| 68 | |
| 69 | static struct crypto_alg des_alg = { |
| 70 | .cra_name = "des", |
| 71 | .cra_driver_name = "des-s390", |
| 72 | .cra_priority = 300, |
| 73 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 74 | .cra_blocksize = DES_BLOCK_SIZE, |
| 75 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 76 | .cra_module = THIS_MODULE, |
| 77 | .cra_u = { |
| 78 | .cipher = { |
| 79 | .cia_min_keysize = DES_KEY_SIZE, |
| 80 | .cia_max_keysize = DES_KEY_SIZE, |
| 81 | .cia_setkey = des_setkey, |
| 82 | .cia_encrypt = des_encrypt, |
| 83 | .cia_decrypt = des_decrypt, |
| 84 | } |
| 85 | } |
| 86 | }; |
| 87 | |
| 88 | static int ecb_desall_crypt(struct blkcipher_desc *desc, unsigned long fc, |
| 89 | struct blkcipher_walk *walk) |
| 90 | { |
| 91 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 92 | unsigned int nbytes, n; |
| 93 | int ret; |
| 94 | |
| 95 | ret = blkcipher_walk_virt(desc, walk); |
| 96 | while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) { |
| 97 | /* only use complete blocks */ |
| 98 | n = nbytes & ~(DES_BLOCK_SIZE - 1); |
| 99 | cpacf_km(fc, ctx->key, walk->dst.virt.addr, |
| 100 | walk->src.virt.addr, n); |
| 101 | ret = blkcipher_walk_done(desc, walk, nbytes - n); |
| 102 | } |
| 103 | return ret; |
| 104 | } |
| 105 | |
| 106 | static int cbc_desall_crypt(struct blkcipher_desc *desc, unsigned long fc, |
| 107 | struct blkcipher_walk *walk) |
| 108 | { |
| 109 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 110 | unsigned int nbytes, n; |
| 111 | int ret; |
| 112 | struct { |
| 113 | u8 iv[DES_BLOCK_SIZE]; |
| 114 | u8 key[DES3_KEY_SIZE]; |
| 115 | } param; |
| 116 | |
| 117 | ret = blkcipher_walk_virt(desc, walk); |
| 118 | memcpy(param.iv, walk->iv, DES_BLOCK_SIZE); |
| 119 | memcpy(param.key, ctx->key, DES3_KEY_SIZE); |
| 120 | while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) { |
| 121 | /* only use complete blocks */ |
| 122 | n = nbytes & ~(DES_BLOCK_SIZE - 1); |
| 123 | cpacf_kmc(fc, ¶m, walk->dst.virt.addr, |
| 124 | walk->src.virt.addr, n); |
| 125 | ret = blkcipher_walk_done(desc, walk, nbytes - n); |
| 126 | } |
| 127 | memcpy(walk->iv, param.iv, DES_BLOCK_SIZE); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | static int ecb_des_encrypt(struct blkcipher_desc *desc, |
| 132 | struct scatterlist *dst, struct scatterlist *src, |
| 133 | unsigned int nbytes) |
| 134 | { |
| 135 | struct blkcipher_walk walk; |
| 136 | |
| 137 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 138 | return ecb_desall_crypt(desc, CPACF_KM_DEA, &walk); |
| 139 | } |
| 140 | |
| 141 | static int ecb_des_decrypt(struct blkcipher_desc *desc, |
| 142 | struct scatterlist *dst, struct scatterlist *src, |
| 143 | unsigned int nbytes) |
| 144 | { |
| 145 | struct blkcipher_walk walk; |
| 146 | |
| 147 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 148 | return ecb_desall_crypt(desc, CPACF_KM_DEA | CPACF_DECRYPT, &walk); |
| 149 | } |
| 150 | |
| 151 | static struct crypto_alg ecb_des_alg = { |
| 152 | .cra_name = "ecb(des)", |
| 153 | .cra_driver_name = "ecb-des-s390", |
| 154 | .cra_priority = 400, /* combo: des + ecb */ |
| 155 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 156 | .cra_blocksize = DES_BLOCK_SIZE, |
| 157 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 158 | .cra_type = &crypto_blkcipher_type, |
| 159 | .cra_module = THIS_MODULE, |
| 160 | .cra_u = { |
| 161 | .blkcipher = { |
| 162 | .min_keysize = DES_KEY_SIZE, |
| 163 | .max_keysize = DES_KEY_SIZE, |
| 164 | .setkey = des_setkey, |
| 165 | .encrypt = ecb_des_encrypt, |
| 166 | .decrypt = ecb_des_decrypt, |
| 167 | } |
| 168 | } |
| 169 | }; |
| 170 | |
| 171 | static int cbc_des_encrypt(struct blkcipher_desc *desc, |
| 172 | struct scatterlist *dst, struct scatterlist *src, |
| 173 | unsigned int nbytes) |
| 174 | { |
| 175 | struct blkcipher_walk walk; |
| 176 | |
| 177 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 178 | return cbc_desall_crypt(desc, CPACF_KMC_DEA, &walk); |
| 179 | } |
| 180 | |
| 181 | static int cbc_des_decrypt(struct blkcipher_desc *desc, |
| 182 | struct scatterlist *dst, struct scatterlist *src, |
| 183 | unsigned int nbytes) |
| 184 | { |
| 185 | struct blkcipher_walk walk; |
| 186 | |
| 187 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 188 | return cbc_desall_crypt(desc, CPACF_KMC_DEA | CPACF_DECRYPT, &walk); |
| 189 | } |
| 190 | |
| 191 | static struct crypto_alg cbc_des_alg = { |
| 192 | .cra_name = "cbc(des)", |
| 193 | .cra_driver_name = "cbc-des-s390", |
| 194 | .cra_priority = 400, /* combo: des + cbc */ |
| 195 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 196 | .cra_blocksize = DES_BLOCK_SIZE, |
| 197 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 198 | .cra_type = &crypto_blkcipher_type, |
| 199 | .cra_module = THIS_MODULE, |
| 200 | .cra_u = { |
| 201 | .blkcipher = { |
| 202 | .min_keysize = DES_KEY_SIZE, |
| 203 | .max_keysize = DES_KEY_SIZE, |
| 204 | .ivsize = DES_BLOCK_SIZE, |
| 205 | .setkey = des_setkey, |
| 206 | .encrypt = cbc_des_encrypt, |
| 207 | .decrypt = cbc_des_decrypt, |
| 208 | } |
| 209 | } |
| 210 | }; |
| 211 | |
| 212 | /* |
| 213 | * RFC2451: |
| 214 | * |
| 215 | * For DES-EDE3, there is no known need to reject weak or |
| 216 | * complementation keys. Any weakness is obviated by the use of |
| 217 | * multiple keys. |
| 218 | * |
| 219 | * However, if the first two or last two independent 64-bit keys are |
| 220 | * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the |
| 221 | * same as DES. Implementers MUST reject keys that exhibit this |
| 222 | * property. |
| 223 | * |
| 224 | */ |
| 225 | static int des3_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 226 | unsigned int key_len) |
| 227 | { |
| 228 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 229 | |
| 230 | if (!(crypto_memneq(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) && |
| 231 | crypto_memneq(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2], |
| 232 | DES_KEY_SIZE)) && |
| 233 | (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { |
| 234 | tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; |
| 235 | return -EINVAL; |
| 236 | } |
| 237 | memcpy(ctx->key, key, key_len); |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 242 | { |
| 243 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 244 | |
| 245 | cpacf_km(CPACF_KM_TDEA_192, ctx->key, dst, src, DES_BLOCK_SIZE); |
| 246 | } |
| 247 | |
| 248 | static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 249 | { |
| 250 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 251 | |
| 252 | cpacf_km(CPACF_KM_TDEA_192 | CPACF_DECRYPT, |
| 253 | ctx->key, dst, src, DES_BLOCK_SIZE); |
| 254 | } |
| 255 | |
| 256 | static struct crypto_alg des3_alg = { |
| 257 | .cra_name = "des3_ede", |
| 258 | .cra_driver_name = "des3_ede-s390", |
| 259 | .cra_priority = 300, |
| 260 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 261 | .cra_blocksize = DES_BLOCK_SIZE, |
| 262 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 263 | .cra_module = THIS_MODULE, |
| 264 | .cra_u = { |
| 265 | .cipher = { |
| 266 | .cia_min_keysize = DES3_KEY_SIZE, |
| 267 | .cia_max_keysize = DES3_KEY_SIZE, |
| 268 | .cia_setkey = des3_setkey, |
| 269 | .cia_encrypt = des3_encrypt, |
| 270 | .cia_decrypt = des3_decrypt, |
| 271 | } |
| 272 | } |
| 273 | }; |
| 274 | |
| 275 | static int ecb_des3_encrypt(struct blkcipher_desc *desc, |
| 276 | struct scatterlist *dst, struct scatterlist *src, |
| 277 | unsigned int nbytes) |
| 278 | { |
| 279 | struct blkcipher_walk walk; |
| 280 | |
| 281 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 282 | return ecb_desall_crypt(desc, CPACF_KM_TDEA_192, &walk); |
| 283 | } |
| 284 | |
| 285 | static int ecb_des3_decrypt(struct blkcipher_desc *desc, |
| 286 | struct scatterlist *dst, struct scatterlist *src, |
| 287 | unsigned int nbytes) |
| 288 | { |
| 289 | struct blkcipher_walk walk; |
| 290 | |
| 291 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 292 | return ecb_desall_crypt(desc, CPACF_KM_TDEA_192 | CPACF_DECRYPT, |
| 293 | &walk); |
| 294 | } |
| 295 | |
| 296 | static struct crypto_alg ecb_des3_alg = { |
| 297 | .cra_name = "ecb(des3_ede)", |
| 298 | .cra_driver_name = "ecb-des3_ede-s390", |
| 299 | .cra_priority = 400, /* combo: des3 + ecb */ |
| 300 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 301 | .cra_blocksize = DES_BLOCK_SIZE, |
| 302 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 303 | .cra_type = &crypto_blkcipher_type, |
| 304 | .cra_module = THIS_MODULE, |
| 305 | .cra_u = { |
| 306 | .blkcipher = { |
| 307 | .min_keysize = DES3_KEY_SIZE, |
| 308 | .max_keysize = DES3_KEY_SIZE, |
| 309 | .setkey = des3_setkey, |
| 310 | .encrypt = ecb_des3_encrypt, |
| 311 | .decrypt = ecb_des3_decrypt, |
| 312 | } |
| 313 | } |
| 314 | }; |
| 315 | |
| 316 | static int cbc_des3_encrypt(struct blkcipher_desc *desc, |
| 317 | struct scatterlist *dst, struct scatterlist *src, |
| 318 | unsigned int nbytes) |
| 319 | { |
| 320 | struct blkcipher_walk walk; |
| 321 | |
| 322 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 323 | return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192, &walk); |
| 324 | } |
| 325 | |
| 326 | static int cbc_des3_decrypt(struct blkcipher_desc *desc, |
| 327 | struct scatterlist *dst, struct scatterlist *src, |
| 328 | unsigned int nbytes) |
| 329 | { |
| 330 | struct blkcipher_walk walk; |
| 331 | |
| 332 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 333 | return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192 | CPACF_DECRYPT, |
| 334 | &walk); |
| 335 | } |
| 336 | |
| 337 | static struct crypto_alg cbc_des3_alg = { |
| 338 | .cra_name = "cbc(des3_ede)", |
| 339 | .cra_driver_name = "cbc-des3_ede-s390", |
| 340 | .cra_priority = 400, /* combo: des3 + cbc */ |
| 341 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 342 | .cra_blocksize = DES_BLOCK_SIZE, |
| 343 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 344 | .cra_type = &crypto_blkcipher_type, |
| 345 | .cra_module = THIS_MODULE, |
| 346 | .cra_u = { |
| 347 | .blkcipher = { |
| 348 | .min_keysize = DES3_KEY_SIZE, |
| 349 | .max_keysize = DES3_KEY_SIZE, |
| 350 | .ivsize = DES_BLOCK_SIZE, |
| 351 | .setkey = des3_setkey, |
| 352 | .encrypt = cbc_des3_encrypt, |
| 353 | .decrypt = cbc_des3_decrypt, |
| 354 | } |
| 355 | } |
| 356 | }; |
| 357 | |
| 358 | static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes) |
| 359 | { |
| 360 | unsigned int i, n; |
| 361 | |
| 362 | /* align to block size, max. PAGE_SIZE */ |
| 363 | n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1); |
| 364 | memcpy(ctrptr, iv, DES_BLOCK_SIZE); |
| 365 | for (i = (n / DES_BLOCK_SIZE) - 1; i > 0; i--) { |
| 366 | memcpy(ctrptr + DES_BLOCK_SIZE, ctrptr, DES_BLOCK_SIZE); |
| 367 | crypto_inc(ctrptr + DES_BLOCK_SIZE, DES_BLOCK_SIZE); |
| 368 | ctrptr += DES_BLOCK_SIZE; |
| 369 | } |
| 370 | return n; |
| 371 | } |
| 372 | |
| 373 | static int ctr_desall_crypt(struct blkcipher_desc *desc, unsigned long fc, |
| 374 | struct blkcipher_walk *walk) |
| 375 | { |
| 376 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 377 | u8 buf[DES_BLOCK_SIZE], *ctrptr; |
| 378 | unsigned int n, nbytes; |
| 379 | int ret, locked; |
| 380 | |
| 381 | locked = spin_trylock(&ctrblk_lock); |
| 382 | |
| 383 | ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE); |
| 384 | while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) { |
| 385 | n = DES_BLOCK_SIZE; |
| 386 | if (nbytes >= 2*DES_BLOCK_SIZE && locked) |
| 387 | n = __ctrblk_init(ctrblk, walk->iv, nbytes); |
| 388 | ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk->iv; |
| 389 | cpacf_kmctr(fc, ctx->key, walk->dst.virt.addr, |
| 390 | walk->src.virt.addr, n, ctrptr); |
| 391 | if (ctrptr == ctrblk) |
| 392 | memcpy(walk->iv, ctrptr + n - DES_BLOCK_SIZE, |
| 393 | DES_BLOCK_SIZE); |
| 394 | crypto_inc(walk->iv, DES_BLOCK_SIZE); |
| 395 | ret = blkcipher_walk_done(desc, walk, nbytes - n); |
| 396 | } |
| 397 | if (locked) |
| 398 | spin_unlock(&ctrblk_lock); |
| 399 | /* final block may be < DES_BLOCK_SIZE, copy only nbytes */ |
| 400 | if (nbytes) { |
| 401 | cpacf_kmctr(fc, ctx->key, buf, walk->src.virt.addr, |
| 402 | DES_BLOCK_SIZE, walk->iv); |
| 403 | memcpy(walk->dst.virt.addr, buf, nbytes); |
| 404 | crypto_inc(walk->iv, DES_BLOCK_SIZE); |
| 405 | ret = blkcipher_walk_done(desc, walk, 0); |
| 406 | } |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | static int ctr_des_encrypt(struct blkcipher_desc *desc, |
| 411 | struct scatterlist *dst, struct scatterlist *src, |
| 412 | unsigned int nbytes) |
| 413 | { |
| 414 | struct blkcipher_walk walk; |
| 415 | |
| 416 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 417 | return ctr_desall_crypt(desc, CPACF_KMCTR_DEA, &walk); |
| 418 | } |
| 419 | |
| 420 | static int ctr_des_decrypt(struct blkcipher_desc *desc, |
| 421 | struct scatterlist *dst, struct scatterlist *src, |
| 422 | unsigned int nbytes) |
| 423 | { |
| 424 | struct blkcipher_walk walk; |
| 425 | |
| 426 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 427 | return ctr_desall_crypt(desc, CPACF_KMCTR_DEA | CPACF_DECRYPT, &walk); |
| 428 | } |
| 429 | |
| 430 | static struct crypto_alg ctr_des_alg = { |
| 431 | .cra_name = "ctr(des)", |
| 432 | .cra_driver_name = "ctr-des-s390", |
| 433 | .cra_priority = 400, /* combo: des + ctr */ |
| 434 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 435 | .cra_blocksize = 1, |
| 436 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 437 | .cra_type = &crypto_blkcipher_type, |
| 438 | .cra_module = THIS_MODULE, |
| 439 | .cra_u = { |
| 440 | .blkcipher = { |
| 441 | .min_keysize = DES_KEY_SIZE, |
| 442 | .max_keysize = DES_KEY_SIZE, |
| 443 | .ivsize = DES_BLOCK_SIZE, |
| 444 | .setkey = des_setkey, |
| 445 | .encrypt = ctr_des_encrypt, |
| 446 | .decrypt = ctr_des_decrypt, |
| 447 | } |
| 448 | } |
| 449 | }; |
| 450 | |
| 451 | static int ctr_des3_encrypt(struct blkcipher_desc *desc, |
| 452 | struct scatterlist *dst, struct scatterlist *src, |
| 453 | unsigned int nbytes) |
| 454 | { |
| 455 | struct blkcipher_walk walk; |
| 456 | |
| 457 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 458 | return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192, &walk); |
| 459 | } |
| 460 | |
| 461 | static int ctr_des3_decrypt(struct blkcipher_desc *desc, |
| 462 | struct scatterlist *dst, struct scatterlist *src, |
| 463 | unsigned int nbytes) |
| 464 | { |
| 465 | struct blkcipher_walk walk; |
| 466 | |
| 467 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 468 | return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192 | CPACF_DECRYPT, |
| 469 | &walk); |
| 470 | } |
| 471 | |
| 472 | static struct crypto_alg ctr_des3_alg = { |
| 473 | .cra_name = "ctr(des3_ede)", |
| 474 | .cra_driver_name = "ctr-des3_ede-s390", |
| 475 | .cra_priority = 400, /* combo: des3 + ede */ |
| 476 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 477 | .cra_blocksize = 1, |
| 478 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
| 479 | .cra_type = &crypto_blkcipher_type, |
| 480 | .cra_module = THIS_MODULE, |
| 481 | .cra_u = { |
| 482 | .blkcipher = { |
| 483 | .min_keysize = DES3_KEY_SIZE, |
| 484 | .max_keysize = DES3_KEY_SIZE, |
| 485 | .ivsize = DES_BLOCK_SIZE, |
| 486 | .setkey = des3_setkey, |
| 487 | .encrypt = ctr_des3_encrypt, |
| 488 | .decrypt = ctr_des3_decrypt, |
| 489 | } |
| 490 | } |
| 491 | }; |
| 492 | |
| 493 | static struct crypto_alg *des_s390_algs_ptr[8]; |
| 494 | static int des_s390_algs_num; |
| 495 | |
| 496 | static int des_s390_register_alg(struct crypto_alg *alg) |
| 497 | { |
| 498 | int ret; |
| 499 | |
| 500 | ret = crypto_register_alg(alg); |
| 501 | if (!ret) |
| 502 | des_s390_algs_ptr[des_s390_algs_num++] = alg; |
| 503 | return ret; |
| 504 | } |
| 505 | |
| 506 | static void des_s390_exit(void) |
| 507 | { |
| 508 | while (des_s390_algs_num--) |
| 509 | crypto_unregister_alg(des_s390_algs_ptr[des_s390_algs_num]); |
| 510 | if (ctrblk) |
| 511 | free_page((unsigned long) ctrblk); |
| 512 | } |
| 513 | |
| 514 | static int __init des_s390_init(void) |
| 515 | { |
| 516 | int ret; |
| 517 | |
| 518 | /* Query available functions for KM, KMC and KMCTR */ |
| 519 | cpacf_query(CPACF_KM, &km_functions); |
| 520 | cpacf_query(CPACF_KMC, &kmc_functions); |
| 521 | cpacf_query(CPACF_KMCTR, &kmctr_functions); |
| 522 | |
| 523 | if (cpacf_test_func(&km_functions, CPACF_KM_DEA)) { |
| 524 | ret = des_s390_register_alg(&des_alg); |
| 525 | if (ret) |
| 526 | goto out_err; |
| 527 | ret = des_s390_register_alg(&ecb_des_alg); |
| 528 | if (ret) |
| 529 | goto out_err; |
| 530 | } |
| 531 | if (cpacf_test_func(&kmc_functions, CPACF_KMC_DEA)) { |
| 532 | ret = des_s390_register_alg(&cbc_des_alg); |
| 533 | if (ret) |
| 534 | goto out_err; |
| 535 | } |
| 536 | if (cpacf_test_func(&km_functions, CPACF_KM_TDEA_192)) { |
| 537 | ret = des_s390_register_alg(&des3_alg); |
| 538 | if (ret) |
| 539 | goto out_err; |
| 540 | ret = des_s390_register_alg(&ecb_des3_alg); |
| 541 | if (ret) |
| 542 | goto out_err; |
| 543 | } |
| 544 | if (cpacf_test_func(&kmc_functions, CPACF_KMC_TDEA_192)) { |
| 545 | ret = des_s390_register_alg(&cbc_des3_alg); |
| 546 | if (ret) |
| 547 | goto out_err; |
| 548 | } |
| 549 | |
| 550 | if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA) || |
| 551 | cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) { |
| 552 | ctrblk = (u8 *) __get_free_page(GFP_KERNEL); |
| 553 | if (!ctrblk) { |
| 554 | ret = -ENOMEM; |
| 555 | goto out_err; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA)) { |
| 560 | ret = des_s390_register_alg(&ctr_des_alg); |
| 561 | if (ret) |
| 562 | goto out_err; |
| 563 | } |
| 564 | if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) { |
| 565 | ret = des_s390_register_alg(&ctr_des3_alg); |
| 566 | if (ret) |
| 567 | goto out_err; |
| 568 | } |
| 569 | |
| 570 | return 0; |
| 571 | out_err: |
| 572 | des_s390_exit(); |
| 573 | return ret; |
| 574 | } |
| 575 | |
| 576 | module_cpu_feature_match(MSA, des_s390_init); |
| 577 | module_exit(des_s390_exit); |
| 578 | |
| 579 | MODULE_ALIAS_CRYPTO("des"); |
| 580 | MODULE_ALIAS_CRYPTO("des3_ede"); |
| 581 | |
| 582 | MODULE_LICENSE("GPL"); |
| 583 | MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms"); |