Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Synchronous Cryptographic Hash operations. |
| 3 | * |
| 4 | * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the Free |
| 8 | * Software Foundation; either version 2 of the License, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 13 | #include <crypto/scatterwalk.h> |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 14 | #include <crypto/internal/hash.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/seq_file.h> |
| 20 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 21 | static const struct crypto_type crypto_shash_type; |
| 22 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 23 | static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) |
| 24 | { |
| 25 | return container_of(tfm, struct crypto_shash, base); |
| 26 | } |
| 27 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 28 | #include "internal.h" |
| 29 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 30 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
| 31 | unsigned int keylen) |
| 32 | { |
| 33 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 34 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 35 | unsigned long absize; |
| 36 | u8 *buffer, *alignbuffer; |
| 37 | int err; |
| 38 | |
| 39 | absize = keylen + (alignmask & ~(CRYPTO_MINALIGN - 1)); |
| 40 | buffer = kmalloc(absize, GFP_KERNEL); |
| 41 | if (!buffer) |
| 42 | return -ENOMEM; |
| 43 | |
| 44 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
| 45 | memcpy(alignbuffer, key, keylen); |
| 46 | err = shash->setkey(tfm, alignbuffer, keylen); |
| 47 | memset(alignbuffer, 0, keylen); |
| 48 | kfree(buffer); |
| 49 | return err; |
| 50 | } |
| 51 | |
| 52 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
| 53 | unsigned int keylen) |
| 54 | { |
| 55 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 56 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 57 | |
Herbert Xu | 3751f40 | 2008-11-08 08:56:57 +0800 | [diff] [blame] | 58 | if (!shash->setkey) |
| 59 | return -ENOSYS; |
| 60 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 61 | if ((unsigned long)key & alignmask) |
| 62 | return shash_setkey_unaligned(tfm, key, keylen); |
| 63 | |
| 64 | return shash->setkey(tfm, key, keylen); |
| 65 | } |
| 66 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); |
| 67 | |
| 68 | static inline unsigned int shash_align_buffer_size(unsigned len, |
| 69 | unsigned long mask) |
| 70 | { |
| 71 | return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1)); |
| 72 | } |
| 73 | |
| 74 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
| 75 | unsigned int len) |
| 76 | { |
| 77 | struct crypto_shash *tfm = desc->tfm; |
| 78 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 79 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 80 | unsigned int unaligned_len = alignmask + 1 - |
| 81 | ((unsigned long)data & alignmask); |
| 82 | u8 buf[shash_align_buffer_size(unaligned_len, alignmask)] |
| 83 | __attribute__ ((aligned)); |
| 84 | |
| 85 | memcpy(buf, data, unaligned_len); |
| 86 | |
| 87 | return shash->update(desc, buf, unaligned_len) ?: |
| 88 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
| 89 | } |
| 90 | |
| 91 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
| 92 | unsigned int len) |
| 93 | { |
| 94 | struct crypto_shash *tfm = desc->tfm; |
| 95 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 96 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 97 | |
| 98 | if ((unsigned long)data & alignmask) |
| 99 | return shash_update_unaligned(desc, data, len); |
| 100 | |
| 101 | return shash->update(desc, data, len); |
| 102 | } |
| 103 | EXPORT_SYMBOL_GPL(crypto_shash_update); |
| 104 | |
| 105 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) |
| 106 | { |
| 107 | struct crypto_shash *tfm = desc->tfm; |
| 108 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 109 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 110 | unsigned int ds = crypto_shash_digestsize(tfm); |
| 111 | u8 buf[shash_align_buffer_size(ds, alignmask)] |
| 112 | __attribute__ ((aligned)); |
| 113 | int err; |
| 114 | |
| 115 | err = shash->final(desc, buf); |
| 116 | memcpy(out, buf, ds); |
| 117 | return err; |
| 118 | } |
| 119 | |
| 120 | int crypto_shash_final(struct shash_desc *desc, u8 *out) |
| 121 | { |
| 122 | struct crypto_shash *tfm = desc->tfm; |
| 123 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 124 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 125 | |
| 126 | if ((unsigned long)out & alignmask) |
| 127 | return shash_final_unaligned(desc, out); |
| 128 | |
| 129 | return shash->final(desc, out); |
| 130 | } |
| 131 | EXPORT_SYMBOL_GPL(crypto_shash_final); |
| 132 | |
| 133 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, |
| 134 | unsigned int len, u8 *out) |
| 135 | { |
| 136 | return crypto_shash_update(desc, data, len) ?: |
| 137 | crypto_shash_final(desc, out); |
| 138 | } |
| 139 | |
| 140 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
| 141 | unsigned int len, u8 *out) |
| 142 | { |
| 143 | struct crypto_shash *tfm = desc->tfm; |
| 144 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 145 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 146 | |
| 147 | if (((unsigned long)data | (unsigned long)out) & alignmask || |
| 148 | !shash->finup) |
| 149 | return shash_finup_unaligned(desc, data, len, out); |
| 150 | |
| 151 | return shash->finup(desc, data, len, out); |
| 152 | } |
| 153 | EXPORT_SYMBOL_GPL(crypto_shash_finup); |
| 154 | |
| 155 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, |
| 156 | unsigned int len, u8 *out) |
| 157 | { |
| 158 | return crypto_shash_init(desc) ?: |
| 159 | crypto_shash_update(desc, data, len) ?: |
| 160 | crypto_shash_final(desc, out); |
| 161 | } |
| 162 | |
| 163 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
| 164 | unsigned int len, u8 *out) |
| 165 | { |
| 166 | struct crypto_shash *tfm = desc->tfm; |
| 167 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 168 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 169 | |
| 170 | if (((unsigned long)data | (unsigned long)out) & alignmask || |
| 171 | !shash->digest) |
| 172 | return shash_digest_unaligned(desc, data, len, out); |
| 173 | |
| 174 | return shash->digest(desc, data, len, out); |
| 175 | } |
| 176 | EXPORT_SYMBOL_GPL(crypto_shash_digest); |
| 177 | |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 178 | int crypto_shash_import(struct shash_desc *desc, const u8 *in) |
| 179 | { |
| 180 | struct crypto_shash *tfm = desc->tfm; |
| 181 | struct shash_alg *alg = crypto_shash_alg(tfm); |
| 182 | |
| 183 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(tfm)); |
| 184 | |
| 185 | if (alg->reinit) |
| 186 | alg->reinit(desc); |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | EXPORT_SYMBOL_GPL(crypto_shash_import); |
| 191 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 192 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
| 193 | unsigned int keylen) |
| 194 | { |
| 195 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); |
| 196 | |
| 197 | return crypto_shash_setkey(*ctx, key, keylen); |
| 198 | } |
| 199 | |
| 200 | static int shash_async_init(struct ahash_request *req) |
| 201 | { |
| 202 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 203 | struct shash_desc *desc = ahash_request_ctx(req); |
| 204 | |
| 205 | desc->tfm = *ctx; |
| 206 | desc->flags = req->base.flags; |
| 207 | |
| 208 | return crypto_shash_init(desc); |
| 209 | } |
| 210 | |
| 211 | static int shash_async_update(struct ahash_request *req) |
| 212 | { |
| 213 | struct shash_desc *desc = ahash_request_ctx(req); |
| 214 | struct crypto_hash_walk walk; |
| 215 | int nbytes; |
| 216 | |
| 217 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; |
| 218 | nbytes = crypto_hash_walk_done(&walk, nbytes)) |
| 219 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
| 220 | |
| 221 | return nbytes; |
| 222 | } |
| 223 | |
| 224 | static int shash_async_final(struct ahash_request *req) |
| 225 | { |
| 226 | return crypto_shash_final(ahash_request_ctx(req), req->result); |
| 227 | } |
| 228 | |
| 229 | static int shash_async_digest(struct ahash_request *req) |
| 230 | { |
| 231 | struct scatterlist *sg = req->src; |
| 232 | unsigned int offset = sg->offset; |
| 233 | unsigned int nbytes = req->nbytes; |
| 234 | int err; |
| 235 | |
| 236 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
| 237 | struct crypto_shash **ctx = |
| 238 | crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 239 | struct shash_desc *desc = ahash_request_ctx(req); |
| 240 | void *data; |
| 241 | |
| 242 | desc->tfm = *ctx; |
| 243 | desc->flags = req->base.flags; |
| 244 | |
| 245 | data = crypto_kmap(sg_page(sg), 0); |
| 246 | err = crypto_shash_digest(desc, data + offset, nbytes, |
| 247 | req->result); |
| 248 | crypto_kunmap(data, 0); |
| 249 | crypto_yield(desc->flags); |
| 250 | goto out; |
| 251 | } |
| 252 | |
| 253 | err = shash_async_init(req); |
| 254 | if (err) |
| 255 | goto out; |
| 256 | |
| 257 | err = shash_async_update(req); |
| 258 | if (err) |
| 259 | goto out; |
| 260 | |
| 261 | err = shash_async_final(req); |
| 262 | |
| 263 | out: |
| 264 | return err; |
| 265 | } |
| 266 | |
| 267 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
| 268 | { |
| 269 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 270 | |
| 271 | crypto_free_shash(*ctx); |
| 272 | } |
| 273 | |
| 274 | static int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
| 275 | { |
| 276 | struct crypto_alg *calg = tfm->__crt_alg; |
| 277 | struct shash_alg *alg = __crypto_shash_alg(calg); |
| 278 | struct ahash_tfm *crt = &tfm->crt_ahash; |
| 279 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 280 | struct crypto_shash *shash; |
| 281 | |
| 282 | if (!crypto_mod_get(calg)) |
| 283 | return -EAGAIN; |
| 284 | |
| 285 | shash = __crypto_shash_cast(crypto_create_tfm( |
| 286 | calg, &crypto_shash_type)); |
| 287 | if (IS_ERR(shash)) { |
| 288 | crypto_mod_put(calg); |
| 289 | return PTR_ERR(shash); |
| 290 | } |
| 291 | |
| 292 | *ctx = shash; |
| 293 | tfm->exit = crypto_exit_shash_ops_async; |
| 294 | |
| 295 | crt->init = shash_async_init; |
| 296 | crt->update = shash_async_update; |
| 297 | crt->final = shash_async_final; |
| 298 | crt->digest = shash_async_digest; |
| 299 | crt->setkey = shash_async_setkey; |
| 300 | |
| 301 | crt->digestsize = alg->digestsize; |
| 302 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 307 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
| 308 | unsigned int keylen) |
| 309 | { |
| 310 | struct shash_desc *desc = crypto_hash_ctx(tfm); |
| 311 | |
| 312 | return crypto_shash_setkey(desc->tfm, key, keylen); |
| 313 | } |
| 314 | |
| 315 | static int shash_compat_init(struct hash_desc *hdesc) |
| 316 | { |
| 317 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); |
| 318 | |
| 319 | desc->flags = hdesc->flags; |
| 320 | |
| 321 | return crypto_shash_init(desc); |
| 322 | } |
| 323 | |
| 324 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, |
| 325 | unsigned int len) |
| 326 | { |
| 327 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); |
| 328 | struct crypto_hash_walk walk; |
| 329 | int nbytes; |
| 330 | |
| 331 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); |
| 332 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) |
| 333 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
| 334 | |
| 335 | return nbytes; |
| 336 | } |
| 337 | |
| 338 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) |
| 339 | { |
| 340 | return crypto_shash_final(crypto_hash_ctx(hdesc->tfm), out); |
| 341 | } |
| 342 | |
| 343 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, |
| 344 | unsigned int nbytes, u8 *out) |
| 345 | { |
| 346 | unsigned int offset = sg->offset; |
| 347 | int err; |
| 348 | |
| 349 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
| 350 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); |
| 351 | void *data; |
| 352 | |
| 353 | desc->flags = hdesc->flags; |
| 354 | |
| 355 | data = crypto_kmap(sg_page(sg), 0); |
| 356 | err = crypto_shash_digest(desc, data + offset, nbytes, out); |
| 357 | crypto_kunmap(data, 0); |
| 358 | crypto_yield(desc->flags); |
| 359 | goto out; |
| 360 | } |
| 361 | |
| 362 | err = shash_compat_init(hdesc); |
| 363 | if (err) |
| 364 | goto out; |
| 365 | |
| 366 | err = shash_compat_update(hdesc, sg, nbytes); |
| 367 | if (err) |
| 368 | goto out; |
| 369 | |
| 370 | err = shash_compat_final(hdesc, out); |
| 371 | |
| 372 | out: |
| 373 | return err; |
| 374 | } |
| 375 | |
| 376 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) |
| 377 | { |
| 378 | struct shash_desc *desc= crypto_tfm_ctx(tfm); |
| 379 | |
| 380 | crypto_free_shash(desc->tfm); |
| 381 | } |
| 382 | |
| 383 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) |
| 384 | { |
| 385 | struct hash_tfm *crt = &tfm->crt_hash; |
| 386 | struct crypto_alg *calg = tfm->__crt_alg; |
| 387 | struct shash_alg *alg = __crypto_shash_alg(calg); |
| 388 | struct shash_desc *desc = crypto_tfm_ctx(tfm); |
| 389 | struct crypto_shash *shash; |
| 390 | |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 391 | if (!crypto_mod_get(calg)) |
| 392 | return -EAGAIN; |
| 393 | |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 394 | shash = __crypto_shash_cast(crypto_create_tfm( |
| 395 | calg, &crypto_shash_type)); |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 396 | if (IS_ERR(shash)) { |
| 397 | crypto_mod_put(calg); |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 398 | return PTR_ERR(shash); |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 399 | } |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 400 | |
| 401 | desc->tfm = shash; |
| 402 | tfm->exit = crypto_exit_shash_ops_compat; |
| 403 | |
| 404 | crt->init = shash_compat_init; |
| 405 | crt->update = shash_compat_update; |
| 406 | crt->final = shash_compat_final; |
| 407 | crt->digest = shash_compat_digest; |
| 408 | crt->setkey = shash_compat_setkey; |
| 409 | |
| 410 | crt->digestsize = alg->digestsize; |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 415 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
| 416 | { |
| 417 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 418 | case CRYPTO_ALG_TYPE_HASH_MASK: |
| 419 | return crypto_init_shash_ops_compat(tfm); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 420 | case CRYPTO_ALG_TYPE_AHASH_MASK: |
| 421 | return crypto_init_shash_ops_async(tfm); |
| 422 | } |
| 423 | |
| 424 | return -EINVAL; |
| 425 | } |
| 426 | |
| 427 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, |
| 428 | u32 mask) |
| 429 | { |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 430 | struct shash_alg *salg = __crypto_shash_alg(alg); |
| 431 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 432 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 433 | case CRYPTO_ALG_TYPE_HASH_MASK: |
| 434 | return sizeof(struct shash_desc) + salg->descsize; |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 435 | case CRYPTO_ALG_TYPE_AHASH_MASK: |
| 436 | return sizeof(struct crypto_shash *); |
| 437 | } |
| 438 | |
| 439 | return 0; |
| 440 | } |
| 441 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 442 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm, |
| 443 | const struct crypto_type *frontend) |
| 444 | { |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg, |
| 449 | const struct crypto_type *frontend) |
| 450 | { |
| 451 | return alg->cra_ctxsize; |
| 452 | } |
| 453 | |
| 454 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 455 | __attribute__ ((unused)); |
| 456 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 457 | { |
| 458 | struct shash_alg *salg = __crypto_shash_alg(alg); |
| 459 | |
| 460 | seq_printf(m, "type : shash\n"); |
| 461 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 462 | seq_printf(m, "digestsize : %u\n", salg->digestsize); |
| 463 | seq_printf(m, "descsize : %u\n", salg->descsize); |
| 464 | } |
| 465 | |
| 466 | static const struct crypto_type crypto_shash_type = { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 467 | .ctxsize = crypto_shash_ctxsize, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 468 | .extsize = crypto_shash_extsize, |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 469 | .init = crypto_init_shash_ops, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 470 | .init_tfm = crypto_shash_init_tfm, |
| 471 | #ifdef CONFIG_PROC_FS |
| 472 | .show = crypto_shash_show, |
| 473 | #endif |
| 474 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
| 475 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 476 | .type = CRYPTO_ALG_TYPE_SHASH, |
| 477 | .tfmsize = offsetof(struct crypto_shash, base), |
| 478 | }; |
| 479 | |
| 480 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
| 481 | u32 mask) |
| 482 | { |
| 483 | return __crypto_shash_cast( |
| 484 | crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask)); |
| 485 | } |
| 486 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); |
| 487 | |
| 488 | int crypto_register_shash(struct shash_alg *alg) |
| 489 | { |
| 490 | struct crypto_alg *base = &alg->base; |
| 491 | |
| 492 | if (alg->digestsize > PAGE_SIZE / 8 || |
| 493 | alg->descsize > PAGE_SIZE / 8) |
| 494 | return -EINVAL; |
| 495 | |
| 496 | base->cra_type = &crypto_shash_type; |
| 497 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 498 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; |
| 499 | |
| 500 | return crypto_register_alg(base); |
| 501 | } |
| 502 | EXPORT_SYMBOL_GPL(crypto_register_shash); |
| 503 | |
| 504 | int crypto_unregister_shash(struct shash_alg *alg) |
| 505 | { |
| 506 | return crypto_unregister_alg(&alg->base); |
| 507 | } |
| 508 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); |
| 509 | |
| 510 | MODULE_LICENSE("GPL"); |
| 511 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |