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 | #include "internal.h" |
| 22 | |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 23 | static const struct crypto_type crypto_shash_type; |
| 24 | |
Herbert Xu | 57cfe44 | 2009-07-11 22:17:39 +0800 | [diff] [blame] | 25 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
| 26 | unsigned int keylen) |
| 27 | { |
| 28 | return -ENOSYS; |
| 29 | } |
| 30 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 31 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
| 32 | unsigned int keylen) |
| 33 | { |
| 34 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 35 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 36 | unsigned long absize; |
| 37 | u8 *buffer, *alignbuffer; |
| 38 | int err; |
| 39 | |
| 40 | absize = keylen + (alignmask & ~(CRYPTO_MINALIGN - 1)); |
| 41 | buffer = kmalloc(absize, GFP_KERNEL); |
| 42 | if (!buffer) |
| 43 | return -ENOMEM; |
| 44 | |
| 45 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
| 46 | memcpy(alignbuffer, key, keylen); |
| 47 | err = shash->setkey(tfm, alignbuffer, keylen); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 48 | kzfree(buffer); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 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 | |
| 58 | if ((unsigned long)key & alignmask) |
| 59 | return shash_setkey_unaligned(tfm, key, keylen); |
| 60 | |
| 61 | return shash->setkey(tfm, key, keylen); |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); |
| 64 | |
| 65 | static inline unsigned int shash_align_buffer_size(unsigned len, |
| 66 | unsigned long mask) |
| 67 | { |
| 68 | return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1)); |
| 69 | } |
| 70 | |
| 71 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
| 72 | unsigned int len) |
| 73 | { |
| 74 | struct crypto_shash *tfm = desc->tfm; |
| 75 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 76 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 77 | unsigned int unaligned_len = alignmask + 1 - |
| 78 | ((unsigned long)data & alignmask); |
| 79 | u8 buf[shash_align_buffer_size(unaligned_len, alignmask)] |
| 80 | __attribute__ ((aligned)); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 81 | int err; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 82 | |
Yehuda Sadeh | f4f6899 | 2009-03-27 13:03:51 +0800 | [diff] [blame] | 83 | if (unaligned_len > len) |
| 84 | unaligned_len = len; |
| 85 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 86 | memcpy(buf, data, unaligned_len); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 87 | err = shash->update(desc, buf, unaligned_len); |
| 88 | memset(buf, 0, unaligned_len); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 89 | |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 90 | return err ?: |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 91 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
| 92 | } |
| 93 | |
| 94 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
| 95 | unsigned int len) |
| 96 | { |
| 97 | struct crypto_shash *tfm = desc->tfm; |
| 98 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 99 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 100 | |
| 101 | if ((unsigned long)data & alignmask) |
| 102 | return shash_update_unaligned(desc, data, len); |
| 103 | |
| 104 | return shash->update(desc, data, len); |
| 105 | } |
| 106 | EXPORT_SYMBOL_GPL(crypto_shash_update); |
| 107 | |
| 108 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) |
| 109 | { |
| 110 | struct crypto_shash *tfm = desc->tfm; |
| 111 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 112 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 113 | unsigned int ds = crypto_shash_digestsize(tfm); |
| 114 | u8 buf[shash_align_buffer_size(ds, alignmask)] |
| 115 | __attribute__ ((aligned)); |
| 116 | int err; |
| 117 | |
| 118 | err = shash->final(desc, buf); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 119 | if (err) |
| 120 | goto out; |
| 121 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 122 | memcpy(out, buf, ds); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame^] | 123 | |
| 124 | out: |
| 125 | memset(buf, 0, ds); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 126 | return err; |
| 127 | } |
| 128 | |
| 129 | int crypto_shash_final(struct shash_desc *desc, u8 *out) |
| 130 | { |
| 131 | struct crypto_shash *tfm = desc->tfm; |
| 132 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 133 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 134 | |
| 135 | if ((unsigned long)out & alignmask) |
| 136 | return shash_final_unaligned(desc, out); |
| 137 | |
| 138 | return shash->final(desc, out); |
| 139 | } |
| 140 | EXPORT_SYMBOL_GPL(crypto_shash_final); |
| 141 | |
| 142 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, |
| 143 | unsigned int len, u8 *out) |
| 144 | { |
| 145 | return crypto_shash_update(desc, data, len) ?: |
| 146 | crypto_shash_final(desc, out); |
| 147 | } |
| 148 | |
| 149 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
| 150 | unsigned int len, u8 *out) |
| 151 | { |
| 152 | struct crypto_shash *tfm = desc->tfm; |
| 153 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 154 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 155 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 156 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 157 | return shash_finup_unaligned(desc, data, len, out); |
| 158 | |
| 159 | return shash->finup(desc, data, len, out); |
| 160 | } |
| 161 | EXPORT_SYMBOL_GPL(crypto_shash_finup); |
| 162 | |
| 163 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, |
| 164 | unsigned int len, u8 *out) |
| 165 | { |
| 166 | return crypto_shash_init(desc) ?: |
Herbert Xu | f88ad8d | 2009-07-08 23:32:08 +0800 | [diff] [blame] | 167 | crypto_shash_finup(desc, data, len, out); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
| 171 | unsigned int len, u8 *out) |
| 172 | { |
| 173 | struct crypto_shash *tfm = desc->tfm; |
| 174 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 175 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 176 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 177 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 178 | return shash_digest_unaligned(desc, data, len, out); |
| 179 | |
| 180 | return shash->digest(desc, data, len, out); |
| 181 | } |
| 182 | EXPORT_SYMBOL_GPL(crypto_shash_digest); |
| 183 | |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 184 | static int shash_no_export(struct shash_desc *desc, void *out) |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 185 | { |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 186 | return -ENOSYS; |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 187 | } |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 188 | |
| 189 | static int shash_no_import(struct shash_desc *desc, const void *in) |
| 190 | { |
| 191 | return -ENOSYS; |
| 192 | } |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 193 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 194 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
| 195 | unsigned int keylen) |
| 196 | { |
| 197 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); |
| 198 | |
| 199 | return crypto_shash_setkey(*ctx, key, keylen); |
| 200 | } |
| 201 | |
| 202 | static int shash_async_init(struct ahash_request *req) |
| 203 | { |
| 204 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 205 | struct shash_desc *desc = ahash_request_ctx(req); |
| 206 | |
| 207 | desc->tfm = *ctx; |
| 208 | desc->flags = req->base.flags; |
| 209 | |
| 210 | return crypto_shash_init(desc); |
| 211 | } |
| 212 | |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 213 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 214 | { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 215 | struct crypto_hash_walk walk; |
| 216 | int nbytes; |
| 217 | |
| 218 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; |
| 219 | nbytes = crypto_hash_walk_done(&walk, nbytes)) |
| 220 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
| 221 | |
| 222 | return nbytes; |
| 223 | } |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 224 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
| 225 | |
| 226 | static int shash_async_update(struct ahash_request *req) |
| 227 | { |
| 228 | return shash_ahash_update(req, ahash_request_ctx(req)); |
| 229 | } |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 230 | |
| 231 | static int shash_async_final(struct ahash_request *req) |
| 232 | { |
| 233 | return crypto_shash_final(ahash_request_ctx(req), req->result); |
| 234 | } |
| 235 | |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 236 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 237 | { |
| 238 | struct scatterlist *sg = req->src; |
| 239 | unsigned int offset = sg->offset; |
| 240 | unsigned int nbytes = req->nbytes; |
| 241 | int err; |
| 242 | |
| 243 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 244 | void *data; |
| 245 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 246 | data = crypto_kmap(sg_page(sg), 0); |
| 247 | err = crypto_shash_digest(desc, data + offset, nbytes, |
| 248 | req->result); |
| 249 | crypto_kunmap(data, 0); |
| 250 | crypto_yield(desc->flags); |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 251 | } else |
| 252 | err = crypto_shash_init(desc) ?: |
| 253 | shash_ahash_update(req, desc) ?: |
| 254 | crypto_shash_final(desc, req->result); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 255 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 256 | return err; |
| 257 | } |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 258 | EXPORT_SYMBOL_GPL(shash_ahash_digest); |
| 259 | |
| 260 | static int shash_async_digest(struct ahash_request *req) |
| 261 | { |
| 262 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 263 | struct shash_desc *desc = ahash_request_ctx(req); |
| 264 | |
| 265 | desc->tfm = *ctx; |
| 266 | desc->flags = req->base.flags; |
| 267 | |
| 268 | return shash_ahash_digest(req, desc); |
| 269 | } |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 270 | |
| 271 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
| 272 | { |
| 273 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 274 | |
| 275 | crypto_free_shash(*ctx); |
| 276 | } |
| 277 | |
Herbert Xu | 88056ec | 2009-07-14 12:28:26 +0800 | [diff] [blame] | 278 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 279 | { |
| 280 | struct crypto_alg *calg = tfm->__crt_alg; |
Herbert Xu | 88056ec | 2009-07-14 12:28:26 +0800 | [diff] [blame] | 281 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 282 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 283 | struct crypto_shash *shash; |
| 284 | |
| 285 | if (!crypto_mod_get(calg)) |
| 286 | return -EAGAIN; |
| 287 | |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 288 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 289 | if (IS_ERR(shash)) { |
| 290 | crypto_mod_put(calg); |
| 291 | return PTR_ERR(shash); |
| 292 | } |
| 293 | |
| 294 | *ctx = shash; |
| 295 | tfm->exit = crypto_exit_shash_ops_async; |
| 296 | |
| 297 | crt->init = shash_async_init; |
| 298 | crt->update = shash_async_update; |
| 299 | crt->final = shash_async_final; |
| 300 | crt->digest = shash_async_digest; |
| 301 | crt->setkey = shash_async_setkey; |
| 302 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 303 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 308 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
| 309 | unsigned int keylen) |
| 310 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 311 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
| 312 | struct shash_desc *desc = *descp; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 313 | |
| 314 | return crypto_shash_setkey(desc->tfm, key, keylen); |
| 315 | } |
| 316 | |
| 317 | static int shash_compat_init(struct hash_desc *hdesc) |
| 318 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 319 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
| 320 | struct shash_desc *desc = *descp; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 321 | |
| 322 | desc->flags = hdesc->flags; |
| 323 | |
| 324 | return crypto_shash_init(desc); |
| 325 | } |
| 326 | |
| 327 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, |
| 328 | unsigned int len) |
| 329 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 330 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
| 331 | struct shash_desc *desc = *descp; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 332 | struct crypto_hash_walk walk; |
| 333 | int nbytes; |
| 334 | |
| 335 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); |
| 336 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) |
| 337 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
| 338 | |
| 339 | return nbytes; |
| 340 | } |
| 341 | |
| 342 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) |
| 343 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 344 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
| 345 | |
| 346 | return crypto_shash_final(*descp, out); |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, |
| 350 | unsigned int nbytes, u8 *out) |
| 351 | { |
| 352 | unsigned int offset = sg->offset; |
| 353 | int err; |
| 354 | |
| 355 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 356 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
| 357 | struct shash_desc *desc = *descp; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 358 | void *data; |
| 359 | |
| 360 | desc->flags = hdesc->flags; |
| 361 | |
| 362 | data = crypto_kmap(sg_page(sg), 0); |
| 363 | err = crypto_shash_digest(desc, data + offset, nbytes, out); |
| 364 | crypto_kunmap(data, 0); |
| 365 | crypto_yield(desc->flags); |
| 366 | goto out; |
| 367 | } |
| 368 | |
| 369 | err = shash_compat_init(hdesc); |
| 370 | if (err) |
| 371 | goto out; |
| 372 | |
| 373 | err = shash_compat_update(hdesc, sg, nbytes); |
| 374 | if (err) |
| 375 | goto out; |
| 376 | |
| 377 | err = shash_compat_final(hdesc, out); |
| 378 | |
| 379 | out: |
| 380 | return err; |
| 381 | } |
| 382 | |
| 383 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) |
| 384 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 385 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
| 386 | struct shash_desc *desc = *descp; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 387 | |
| 388 | crypto_free_shash(desc->tfm); |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 389 | kzfree(desc); |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) |
| 393 | { |
| 394 | struct hash_tfm *crt = &tfm->crt_hash; |
| 395 | struct crypto_alg *calg = tfm->__crt_alg; |
| 396 | struct shash_alg *alg = __crypto_shash_alg(calg); |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 397 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 398 | struct crypto_shash *shash; |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 399 | struct shash_desc *desc; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 400 | |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 401 | if (!crypto_mod_get(calg)) |
| 402 | return -EAGAIN; |
| 403 | |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 404 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 405 | if (IS_ERR(shash)) { |
| 406 | crypto_mod_put(calg); |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 407 | return PTR_ERR(shash); |
Adrian-Ken Rueegsegger | 4abfd73 | 2009-02-05 16:19:31 +1100 | [diff] [blame] | 408 | } |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 409 | |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 410 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
| 411 | GFP_KERNEL); |
| 412 | if (!desc) { |
| 413 | crypto_free_shash(shash); |
| 414 | return -ENOMEM; |
| 415 | } |
| 416 | |
| 417 | *descp = desc; |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 418 | desc->tfm = shash; |
| 419 | tfm->exit = crypto_exit_shash_ops_compat; |
| 420 | |
| 421 | crt->init = shash_compat_init; |
| 422 | crt->update = shash_compat_update; |
| 423 | crt->final = shash_compat_final; |
| 424 | crt->digest = shash_compat_digest; |
| 425 | crt->setkey = shash_compat_setkey; |
| 426 | |
| 427 | crt->digestsize = alg->digestsize; |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 432 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
| 433 | { |
| 434 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 435 | case CRYPTO_ALG_TYPE_HASH_MASK: |
| 436 | return crypto_init_shash_ops_compat(tfm); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | return -EINVAL; |
| 440 | } |
| 441 | |
| 442 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, |
| 443 | u32 mask) |
| 444 | { |
| 445 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
Herbert Xu | 5f7082e | 2008-08-31 22:21:09 +1000 | [diff] [blame] | 446 | case CRYPTO_ALG_TYPE_HASH_MASK: |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 447 | return sizeof(struct shash_desc *); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
Herbert Xu | 2ca33da | 2009-07-13 20:46:25 +0800 | [diff] [blame] | 453 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 454 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 455 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
| 456 | |
| 457 | hash->descsize = crypto_shash_alg(hash)->descsize; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 458 | return 0; |
| 459 | } |
| 460 | |
Herbert Xu | 2ca33da | 2009-07-13 20:46:25 +0800 | [diff] [blame] | 461 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 462 | { |
| 463 | return alg->cra_ctxsize; |
| 464 | } |
| 465 | |
| 466 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 467 | __attribute__ ((unused)); |
| 468 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 469 | { |
| 470 | struct shash_alg *salg = __crypto_shash_alg(alg); |
| 471 | |
| 472 | seq_printf(m, "type : shash\n"); |
| 473 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 474 | seq_printf(m, "digestsize : %u\n", salg->digestsize); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | static const struct crypto_type crypto_shash_type = { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 478 | .ctxsize = crypto_shash_ctxsize, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 479 | .extsize = crypto_shash_extsize, |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 480 | .init = crypto_init_shash_ops, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 481 | .init_tfm = crypto_shash_init_tfm, |
| 482 | #ifdef CONFIG_PROC_FS |
| 483 | .show = crypto_shash_show, |
| 484 | #endif |
| 485 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
| 486 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 487 | .type = CRYPTO_ALG_TYPE_SHASH, |
| 488 | .tfmsize = offsetof(struct crypto_shash, base), |
| 489 | }; |
| 490 | |
| 491 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
| 492 | u32 mask) |
| 493 | { |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 494 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 495 | } |
| 496 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); |
| 497 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 498 | static int shash_prepare_alg(struct shash_alg *alg) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 499 | { |
| 500 | struct crypto_alg *base = &alg->base; |
| 501 | |
| 502 | if (alg->digestsize > PAGE_SIZE / 8 || |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 503 | alg->descsize > PAGE_SIZE / 8 || |
| 504 | alg->statesize > PAGE_SIZE / 8) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 505 | return -EINVAL; |
| 506 | |
| 507 | base->cra_type = &crypto_shash_type; |
| 508 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 509 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 510 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 511 | if (!alg->finup) |
| 512 | alg->finup = shash_finup_unaligned; |
| 513 | if (!alg->digest) |
| 514 | alg->digest = shash_digest_unaligned; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 515 | if (!alg->import) |
| 516 | alg->import = shash_no_import; |
| 517 | if (!alg->export) |
| 518 | alg->export = shash_no_export; |
Herbert Xu | 57cfe44 | 2009-07-11 22:17:39 +0800 | [diff] [blame] | 519 | if (!alg->setkey) |
| 520 | alg->setkey = shash_no_setkey; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 521 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | int crypto_register_shash(struct shash_alg *alg) |
| 526 | { |
| 527 | struct crypto_alg *base = &alg->base; |
| 528 | int err; |
| 529 | |
| 530 | err = shash_prepare_alg(alg); |
| 531 | if (err) |
| 532 | return err; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 533 | |
| 534 | return crypto_register_alg(base); |
| 535 | } |
| 536 | EXPORT_SYMBOL_GPL(crypto_register_shash); |
| 537 | |
| 538 | int crypto_unregister_shash(struct shash_alg *alg) |
| 539 | { |
| 540 | return crypto_unregister_alg(&alg->base); |
| 541 | } |
| 542 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); |
| 543 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 544 | int shash_register_instance(struct crypto_template *tmpl, |
| 545 | struct shash_instance *inst) |
| 546 | { |
| 547 | int err; |
| 548 | |
| 549 | err = shash_prepare_alg(&inst->alg); |
| 550 | if (err) |
| 551 | return err; |
| 552 | |
| 553 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); |
| 554 | } |
| 555 | EXPORT_SYMBOL_GPL(shash_register_instance); |
| 556 | |
Herbert Xu | 2e4fddd | 2009-07-07 15:17:12 +0800 | [diff] [blame] | 557 | void shash_free_instance(struct crypto_instance *inst) |
| 558 | { |
| 559 | crypto_drop_spawn(crypto_instance_ctx(inst)); |
| 560 | kfree(shash_instance(inst)); |
| 561 | } |
| 562 | EXPORT_SYMBOL_GPL(shash_free_instance); |
| 563 | |
Herbert Xu | 9429699 | 2009-07-08 17:21:37 +0800 | [diff] [blame] | 564 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
| 565 | struct shash_alg *alg, |
| 566 | struct crypto_instance *inst) |
| 567 | { |
| 568 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, |
| 569 | &crypto_shash_type); |
| 570 | } |
| 571 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); |
| 572 | |
Herbert Xu | 7d6f564 | 2009-07-08 17:56:28 +0800 | [diff] [blame] | 573 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
| 574 | { |
| 575 | struct crypto_alg *alg; |
| 576 | |
| 577 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); |
| 578 | return IS_ERR(alg) ? ERR_CAST(alg) : |
| 579 | container_of(alg, struct shash_alg, base); |
| 580 | } |
| 581 | EXPORT_SYMBOL_GPL(shash_attr_alg); |
| 582 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 583 | MODULE_LICENSE("GPL"); |
| 584 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |