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> |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 20 | #include <linux/cryptouser.h> |
| 21 | #include <net/netlink.h> |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 22 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 23 | #include "internal.h" |
| 24 | |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 25 | static const struct crypto_type crypto_shash_type; |
| 26 | |
Eric Biggers | 43259d0 | 2017-11-28 18:01:38 -0800 | [diff] [blame] | 27 | int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
| 28 | unsigned int keylen) |
Herbert Xu | 57cfe44 | 2009-07-11 22:17:39 +0800 | [diff] [blame] | 29 | { |
| 30 | return -ENOSYS; |
| 31 | } |
Eric Biggers | 43259d0 | 2017-11-28 18:01:38 -0800 | [diff] [blame] | 32 | EXPORT_SYMBOL_GPL(shash_no_setkey); |
Herbert Xu | 57cfe44 | 2009-07-11 22:17:39 +0800 | [diff] [blame] | 33 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 34 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
| 35 | unsigned int keylen) |
| 36 | { |
| 37 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 38 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 39 | unsigned long absize; |
| 40 | u8 *buffer, *alignbuffer; |
| 41 | int err; |
| 42 | |
Herbert Xu | 18eb8ea | 2010-05-19 11:50:58 +1000 | [diff] [blame] | 43 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 44 | buffer = kmalloc(absize, GFP_KERNEL); |
| 45 | if (!buffer) |
| 46 | return -ENOMEM; |
| 47 | |
| 48 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
| 49 | memcpy(alignbuffer, key, keylen); |
| 50 | err = shash->setkey(tfm, alignbuffer, keylen); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 51 | kzfree(buffer); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 52 | return err; |
| 53 | } |
| 54 | |
| 55 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
| 56 | unsigned int keylen) |
| 57 | { |
| 58 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 59 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 60 | |
| 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 | { |
Mark Charlebois | 66d8ea5 | 2012-11-20 21:18:16 +0100 | [diff] [blame] | 71 | typedef u8 __attribute__ ((aligned)) u8_aligned; |
| 72 | return len + (mask & ~(__alignof__(u8_aligned) - 1)); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
| 76 | unsigned int len) |
| 77 | { |
| 78 | struct crypto_shash *tfm = desc->tfm; |
| 79 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 80 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 81 | unsigned int unaligned_len = alignmask + 1 - |
| 82 | ((unsigned long)data & alignmask); |
Herbert Xu | 0e2d3a1 | 2009-07-14 21:43:56 +0800 | [diff] [blame] | 83 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 84 | __attribute__ ((aligned)); |
Herbert Xu | 0e2d3a1 | 2009-07-14 21:43:56 +0800 | [diff] [blame] | 85 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 86 | int err; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 87 | |
Yehuda Sadeh | f4f6899 | 2009-03-27 13:03:51 +0800 | [diff] [blame] | 88 | if (unaligned_len > len) |
| 89 | unaligned_len = len; |
| 90 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 91 | memcpy(buf, data, unaligned_len); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 92 | err = shash->update(desc, buf, unaligned_len); |
| 93 | memset(buf, 0, unaligned_len); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 94 | |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 95 | return err ?: |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 96 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
| 97 | } |
| 98 | |
| 99 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
| 100 | unsigned int len) |
| 101 | { |
| 102 | struct crypto_shash *tfm = desc->tfm; |
| 103 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 104 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 105 | |
| 106 | if ((unsigned long)data & alignmask) |
| 107 | return shash_update_unaligned(desc, data, len); |
| 108 | |
| 109 | return shash->update(desc, data, len); |
| 110 | } |
| 111 | EXPORT_SYMBOL_GPL(crypto_shash_update); |
| 112 | |
| 113 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) |
| 114 | { |
| 115 | struct crypto_shash *tfm = desc->tfm; |
| 116 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 117 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 118 | unsigned int ds = crypto_shash_digestsize(tfm); |
Herbert Xu | 0e2d3a1 | 2009-07-14 21:43:56 +0800 | [diff] [blame] | 119 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 120 | __attribute__ ((aligned)); |
Herbert Xu | 0e2d3a1 | 2009-07-14 21:43:56 +0800 | [diff] [blame] | 121 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 122 | int err; |
| 123 | |
| 124 | err = shash->final(desc, buf); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 125 | if (err) |
| 126 | goto out; |
| 127 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 128 | memcpy(out, buf, ds); |
Herbert Xu | 8c32c51 | 2009-07-14 21:35:36 +0800 | [diff] [blame] | 129 | |
| 130 | out: |
| 131 | memset(buf, 0, ds); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 132 | return err; |
| 133 | } |
| 134 | |
| 135 | int crypto_shash_final(struct shash_desc *desc, u8 *out) |
| 136 | { |
| 137 | struct crypto_shash *tfm = desc->tfm; |
| 138 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 139 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 140 | |
| 141 | if ((unsigned long)out & alignmask) |
| 142 | return shash_final_unaligned(desc, out); |
| 143 | |
| 144 | return shash->final(desc, out); |
| 145 | } |
| 146 | EXPORT_SYMBOL_GPL(crypto_shash_final); |
| 147 | |
| 148 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, |
| 149 | unsigned int len, u8 *out) |
| 150 | { |
| 151 | return crypto_shash_update(desc, data, len) ?: |
| 152 | crypto_shash_final(desc, out); |
| 153 | } |
| 154 | |
| 155 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
| 156 | unsigned int len, u8 *out) |
| 157 | { |
| 158 | struct crypto_shash *tfm = desc->tfm; |
| 159 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 160 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 161 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 162 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 163 | return shash_finup_unaligned(desc, data, len, out); |
| 164 | |
| 165 | return shash->finup(desc, data, len, out); |
| 166 | } |
| 167 | EXPORT_SYMBOL_GPL(crypto_shash_finup); |
| 168 | |
| 169 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, |
| 170 | unsigned int len, u8 *out) |
| 171 | { |
| 172 | return crypto_shash_init(desc) ?: |
Herbert Xu | f88ad8d | 2009-07-08 23:32:08 +0800 | [diff] [blame] | 173 | crypto_shash_finup(desc, data, len, out); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
| 177 | unsigned int len, u8 *out) |
| 178 | { |
| 179 | struct crypto_shash *tfm = desc->tfm; |
| 180 | struct shash_alg *shash = crypto_shash_alg(tfm); |
| 181 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
| 182 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 183 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 184 | return shash_digest_unaligned(desc, data, len, out); |
| 185 | |
| 186 | return shash->digest(desc, data, len, out); |
| 187 | } |
| 188 | EXPORT_SYMBOL_GPL(crypto_shash_digest); |
| 189 | |
Herbert Xu | f592682 | 2009-07-22 12:37:06 +0800 | [diff] [blame] | 190 | static int shash_default_export(struct shash_desc *desc, void *out) |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 191 | { |
Herbert Xu | f592682 | 2009-07-22 12:37:06 +0800 | [diff] [blame] | 192 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
| 193 | return 0; |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 194 | } |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 195 | |
Herbert Xu | f592682 | 2009-07-22 12:37:06 +0800 | [diff] [blame] | 196 | static int shash_default_import(struct shash_desc *desc, const void *in) |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 197 | { |
Herbert Xu | f592682 | 2009-07-22 12:37:06 +0800 | [diff] [blame] | 198 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
| 199 | return 0; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 200 | } |
Herbert Xu | dec8b78 | 2008-11-02 21:38:11 +0800 | [diff] [blame] | 201 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 202 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
| 203 | unsigned int keylen) |
| 204 | { |
| 205 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); |
| 206 | |
| 207 | return crypto_shash_setkey(*ctx, key, keylen); |
| 208 | } |
| 209 | |
| 210 | static int shash_async_init(struct ahash_request *req) |
| 211 | { |
| 212 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 213 | struct shash_desc *desc = ahash_request_ctx(req); |
| 214 | |
| 215 | desc->tfm = *ctx; |
| 216 | desc->flags = req->base.flags; |
| 217 | |
| 218 | return crypto_shash_init(desc); |
| 219 | } |
| 220 | |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 221 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 222 | { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 223 | struct crypto_hash_walk walk; |
| 224 | int nbytes; |
| 225 | |
| 226 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; |
| 227 | nbytes = crypto_hash_walk_done(&walk, nbytes)) |
| 228 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
| 229 | |
| 230 | return nbytes; |
| 231 | } |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 232 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
| 233 | |
| 234 | static int shash_async_update(struct ahash_request *req) |
| 235 | { |
| 236 | return shash_ahash_update(req, ahash_request_ctx(req)); |
| 237 | } |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 238 | |
| 239 | static int shash_async_final(struct ahash_request *req) |
| 240 | { |
| 241 | return crypto_shash_final(ahash_request_ctx(req), req->result); |
| 242 | } |
| 243 | |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 244 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
| 245 | { |
| 246 | struct crypto_hash_walk walk; |
| 247 | int nbytes; |
| 248 | |
Herbert Xu | cbc86b9 | 2009-07-15 21:26:41 +0800 | [diff] [blame] | 249 | nbytes = crypto_hash_walk_first(req, &walk); |
| 250 | if (!nbytes) |
| 251 | return crypto_shash_final(desc, req->result); |
| 252 | |
| 253 | do { |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 254 | nbytes = crypto_hash_walk_last(&walk) ? |
| 255 | crypto_shash_finup(desc, walk.data, nbytes, |
| 256 | req->result) : |
| 257 | crypto_shash_update(desc, walk.data, nbytes); |
Herbert Xu | cbc86b9 | 2009-07-15 21:26:41 +0800 | [diff] [blame] | 258 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
| 259 | } while (nbytes > 0); |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 260 | |
| 261 | return nbytes; |
| 262 | } |
| 263 | EXPORT_SYMBOL_GPL(shash_ahash_finup); |
| 264 | |
| 265 | static int shash_async_finup(struct ahash_request *req) |
| 266 | { |
| 267 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 268 | struct shash_desc *desc = ahash_request_ctx(req); |
| 269 | |
| 270 | desc->tfm = *ctx; |
| 271 | desc->flags = req->base.flags; |
| 272 | |
| 273 | return shash_ahash_finup(req, desc); |
| 274 | } |
| 275 | |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 276 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 277 | { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 278 | unsigned int nbytes = req->nbytes; |
Herbert Xu | 91daaef | 2017-10-09 23:30:02 +0800 | [diff] [blame] | 279 | struct scatterlist *sg; |
| 280 | unsigned int offset; |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 281 | int err; |
| 282 | |
Herbert Xu | 91daaef | 2017-10-09 23:30:02 +0800 | [diff] [blame] | 283 | if (nbytes && |
| 284 | (sg = req->src, offset = sg->offset, |
| 285 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 286 | void *data; |
| 287 | |
Cong Wang | f0dfc0b | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 288 | data = kmap_atomic(sg_page(sg)); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 289 | err = crypto_shash_digest(desc, data + offset, nbytes, |
| 290 | req->result); |
Cong Wang | f0dfc0b | 2011-11-25 23:14:17 +0800 | [diff] [blame] | 291 | kunmap_atomic(data); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 292 | crypto_yield(desc->flags); |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 293 | } else |
| 294 | err = crypto_shash_init(desc) ?: |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 295 | shash_ahash_finup(req, desc); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 296 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 297 | return err; |
| 298 | } |
Herbert Xu | 7eddf95 | 2009-07-12 21:25:20 +0800 | [diff] [blame] | 299 | EXPORT_SYMBOL_GPL(shash_ahash_digest); |
| 300 | |
| 301 | static int shash_async_digest(struct ahash_request *req) |
| 302 | { |
| 303 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 304 | struct shash_desc *desc = ahash_request_ctx(req); |
| 305 | |
| 306 | desc->tfm = *ctx; |
| 307 | desc->flags = req->base.flags; |
| 308 | |
| 309 | return shash_ahash_digest(req, desc); |
| 310 | } |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 311 | |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 312 | static int shash_async_export(struct ahash_request *req, void *out) |
| 313 | { |
| 314 | return crypto_shash_export(ahash_request_ctx(req), out); |
| 315 | } |
| 316 | |
| 317 | static int shash_async_import(struct ahash_request *req, const void *in) |
| 318 | { |
Herbert Xu | 90246e7 | 2010-11-04 13:00:22 -0500 | [diff] [blame] | 319 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
| 320 | struct shash_desc *desc = ahash_request_ctx(req); |
| 321 | |
| 322 | desc->tfm = *ctx; |
| 323 | desc->flags = req->base.flags; |
| 324 | |
| 325 | return crypto_shash_import(desc, in); |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 326 | } |
| 327 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 328 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
| 329 | { |
| 330 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 331 | |
| 332 | crypto_free_shash(*ctx); |
| 333 | } |
| 334 | |
Herbert Xu | 88056ec | 2009-07-14 12:28:26 +0800 | [diff] [blame] | 335 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 336 | { |
| 337 | struct crypto_alg *calg = tfm->__crt_alg; |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 338 | struct shash_alg *alg = __crypto_shash_alg(calg); |
Herbert Xu | 88056ec | 2009-07-14 12:28:26 +0800 | [diff] [blame] | 339 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 340 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
| 341 | struct crypto_shash *shash; |
| 342 | |
| 343 | if (!crypto_mod_get(calg)) |
| 344 | return -EAGAIN; |
| 345 | |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 346 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 347 | if (IS_ERR(shash)) { |
| 348 | crypto_mod_put(calg); |
| 349 | return PTR_ERR(shash); |
| 350 | } |
| 351 | |
| 352 | *ctx = shash; |
| 353 | tfm->exit = crypto_exit_shash_ops_async; |
| 354 | |
| 355 | crt->init = shash_async_init; |
| 356 | crt->update = shash_async_update; |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 357 | crt->final = shash_async_final; |
| 358 | crt->finup = shash_async_finup; |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 359 | crt->digest = shash_async_digest; |
Herbert Xu | 00420a6 | 2016-01-27 00:16:37 +0800 | [diff] [blame] | 360 | crt->setkey = shash_async_setkey; |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 361 | |
Herbert Xu | 00420a6 | 2016-01-27 00:16:37 +0800 | [diff] [blame] | 362 | crt->has_setkey = alg->setkey != shash_no_setkey; |
| 363 | |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 364 | if (alg->export) |
| 365 | crt->export = shash_async_export; |
Steffen Klassert | 0044f3e | 2009-07-24 13:57:13 +0800 | [diff] [blame] | 366 | if (alg->import) |
Herbert Xu | 66f6ce5 | 2009-07-15 12:40:40 +0800 | [diff] [blame] | 367 | crt->import = shash_async_import; |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 368 | |
Herbert Xu | 3b2f6df | 2008-08-31 18:52:18 +1000 | [diff] [blame] | 369 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
Herbert Xu | 2ca33da | 2009-07-13 20:46:25 +0800 | [diff] [blame] | 374 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 375 | { |
Herbert Xu | 113adef | 2009-07-14 12:50:12 +0800 | [diff] [blame] | 376 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
| 377 | |
| 378 | hash->descsize = crypto_shash_alg(hash)->descsize; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 379 | return 0; |
| 380 | } |
| 381 | |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 382 | #ifdef CONFIG_NET |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 383 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 384 | { |
| 385 | struct crypto_report_hash rhash; |
| 386 | struct shash_alg *salg = __crypto_shash_alg(alg); |
| 387 | |
Mathias Krause | 9a5467b | 2013-02-05 18:19:13 +0100 | [diff] [blame] | 388 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
| 389 | |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 390 | rhash.blocksize = alg->cra_blocksize; |
| 391 | rhash.digestsize = salg->digestsize; |
| 392 | |
David S. Miller | 6662df3 | 2012-04-01 20:19:05 -0400 | [diff] [blame] | 393 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
| 394 | sizeof(struct crypto_report_hash), &rhash)) |
| 395 | goto nla_put_failure; |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 396 | return 0; |
| 397 | |
| 398 | nla_put_failure: |
| 399 | return -EMSGSIZE; |
| 400 | } |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 401 | #else |
| 402 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 403 | { |
| 404 | return -ENOSYS; |
| 405 | } |
| 406 | #endif |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 407 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 408 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 409 | __attribute__ ((unused)); |
| 410 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
| 411 | { |
| 412 | struct shash_alg *salg = __crypto_shash_alg(alg); |
| 413 | |
| 414 | seq_printf(m, "type : shash\n"); |
| 415 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 416 | seq_printf(m, "digestsize : %u\n", salg->digestsize); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | static const struct crypto_type crypto_shash_type = { |
Herbert Xu | ac61168 | 2015-04-20 13:39:01 +0800 | [diff] [blame] | 420 | .extsize = crypto_alg_extsize, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 421 | .init_tfm = crypto_shash_init_tfm, |
| 422 | #ifdef CONFIG_PROC_FS |
| 423 | .show = crypto_shash_show, |
| 424 | #endif |
Steffen Klassert | f4d663c | 2011-09-27 07:26:10 +0200 | [diff] [blame] | 425 | .report = crypto_shash_report, |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 426 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
| 427 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 428 | .type = CRYPTO_ALG_TYPE_SHASH, |
| 429 | .tfmsize = offsetof(struct crypto_shash, base), |
| 430 | }; |
| 431 | |
| 432 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
| 433 | u32 mask) |
| 434 | { |
Herbert Xu | 3f683d6 | 2009-02-18 16:56:59 +0800 | [diff] [blame] | 435 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 436 | } |
| 437 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); |
| 438 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 439 | static int shash_prepare_alg(struct shash_alg *alg) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 440 | { |
| 441 | struct crypto_alg *base = &alg->base; |
| 442 | |
| 443 | if (alg->digestsize > PAGE_SIZE / 8 || |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 444 | alg->descsize > PAGE_SIZE / 8 || |
| 445 | alg->statesize > PAGE_SIZE / 8) |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 446 | return -EINVAL; |
| 447 | |
| 448 | base->cra_type = &crypto_shash_type; |
| 449 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 450 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 451 | |
Herbert Xu | 8267ada | 2009-07-09 20:36:44 +0800 | [diff] [blame] | 452 | if (!alg->finup) |
| 453 | alg->finup = shash_finup_unaligned; |
| 454 | if (!alg->digest) |
| 455 | alg->digest = shash_digest_unaligned; |
Herbert Xu | f592682 | 2009-07-22 12:37:06 +0800 | [diff] [blame] | 456 | if (!alg->export) { |
| 457 | alg->export = shash_default_export; |
| 458 | alg->import = shash_default_import; |
| 459 | alg->statesize = alg->descsize; |
| 460 | } |
Herbert Xu | 57cfe44 | 2009-07-11 22:17:39 +0800 | [diff] [blame] | 461 | if (!alg->setkey) |
| 462 | alg->setkey = shash_no_setkey; |
Herbert Xu | 99d27e1 | 2009-07-09 20:30:57 +0800 | [diff] [blame] | 463 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | int crypto_register_shash(struct shash_alg *alg) |
| 468 | { |
| 469 | struct crypto_alg *base = &alg->base; |
| 470 | int err; |
| 471 | |
| 472 | err = shash_prepare_alg(alg); |
| 473 | if (err) |
| 474 | return err; |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 475 | |
| 476 | return crypto_register_alg(base); |
| 477 | } |
| 478 | EXPORT_SYMBOL_GPL(crypto_register_shash); |
| 479 | |
| 480 | int crypto_unregister_shash(struct shash_alg *alg) |
| 481 | { |
| 482 | return crypto_unregister_alg(&alg->base); |
| 483 | } |
| 484 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); |
| 485 | |
Jussi Kivilinna | 50fc3e8 | 2012-07-11 14:20:20 +0300 | [diff] [blame] | 486 | int crypto_register_shashes(struct shash_alg *algs, int count) |
| 487 | { |
| 488 | int i, ret; |
| 489 | |
| 490 | for (i = 0; i < count; i++) { |
| 491 | ret = crypto_register_shash(&algs[i]); |
| 492 | if (ret) |
| 493 | goto err; |
| 494 | } |
| 495 | |
| 496 | return 0; |
| 497 | |
| 498 | err: |
| 499 | for (--i; i >= 0; --i) |
| 500 | crypto_unregister_shash(&algs[i]); |
| 501 | |
| 502 | return ret; |
| 503 | } |
| 504 | EXPORT_SYMBOL_GPL(crypto_register_shashes); |
| 505 | |
| 506 | int crypto_unregister_shashes(struct shash_alg *algs, int count) |
| 507 | { |
| 508 | int i, ret; |
| 509 | |
| 510 | for (i = count - 1; i >= 0; --i) { |
| 511 | ret = crypto_unregister_shash(&algs[i]); |
| 512 | if (ret) |
| 513 | pr_err("Failed to unregister %s %s: %d\n", |
| 514 | algs[i].base.cra_driver_name, |
| 515 | algs[i].base.cra_name, ret); |
| 516 | } |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); |
| 521 | |
Herbert Xu | 619a6eb | 2009-07-08 18:46:23 +0800 | [diff] [blame] | 522 | int shash_register_instance(struct crypto_template *tmpl, |
| 523 | struct shash_instance *inst) |
| 524 | { |
| 525 | int err; |
| 526 | |
| 527 | err = shash_prepare_alg(&inst->alg); |
| 528 | if (err) |
| 529 | return err; |
| 530 | |
| 531 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); |
| 532 | } |
| 533 | EXPORT_SYMBOL_GPL(shash_register_instance); |
| 534 | |
Herbert Xu | 2e4fddd | 2009-07-07 15:17:12 +0800 | [diff] [blame] | 535 | void shash_free_instance(struct crypto_instance *inst) |
| 536 | { |
| 537 | crypto_drop_spawn(crypto_instance_ctx(inst)); |
| 538 | kfree(shash_instance(inst)); |
| 539 | } |
| 540 | EXPORT_SYMBOL_GPL(shash_free_instance); |
| 541 | |
Herbert Xu | 9429699 | 2009-07-08 17:21:37 +0800 | [diff] [blame] | 542 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
| 543 | struct shash_alg *alg, |
| 544 | struct crypto_instance *inst) |
| 545 | { |
| 546 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, |
| 547 | &crypto_shash_type); |
| 548 | } |
| 549 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); |
| 550 | |
Herbert Xu | 7d6f564 | 2009-07-08 17:56:28 +0800 | [diff] [blame] | 551 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
| 552 | { |
| 553 | struct crypto_alg *alg; |
| 554 | |
| 555 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); |
| 556 | return IS_ERR(alg) ? ERR_CAST(alg) : |
| 557 | container_of(alg, struct shash_alg, base); |
| 558 | } |
| 559 | EXPORT_SYMBOL_GPL(shash_attr_alg); |
| 560 | |
Herbert Xu | 7b5a080b | 2008-08-31 15:47:27 +1000 | [diff] [blame] | 561 | MODULE_LICENSE("GPL"); |
| 562 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |