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7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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
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2008-08-31 crypto: hash - Export shash through ahash
13 #include <crypto/scatterwalk.h>
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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
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21 #include "internal.h"
22
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2009-02-18 crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention
23 static const struct crypto_type crypto_shash_type;
24
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2009-07-11 crypto: shash - Move null setkey check to registration time
25 static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
26 unsigned int keylen)
27 {
28 return -ENOSYS;
29 }
30
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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);
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48 kzfree(buffer);
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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));
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81 int err;
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82
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83 if (unaligned_len > len)
84 unaligned_len = len;
85
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86 memcpy(buf, data, unaligned_len);
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87 err = shash->update(desc, buf, unaligned_len);
88 memset(buf, 0, unaligned_len);
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89
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90 return err ?:
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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);
8c32c516 »
2009-07-14 crypto: hash - Zap unaligned buffers
119 if (err)
120 goto out;
121
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122 memcpy(out, buf, ds);
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123
124 out:
125 memset(buf, 0, ds);
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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
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2009-07-09 crypto: shash - Move finup/digest null checks to registration time
156 if (((unsigned long)data | (unsigned long)out) & alignmask)
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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) ?:
f88ad8de »
2009-07-08 crypto: shash - Use finup in default digest
167 crypto_shash_finup(desc, data, len, out);
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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
8267adab »
2009-07-09 crypto: shash - Move finup/digest null checks to registration time
177 if (((unsigned long)data | (unsigned long)out) & alignmask)
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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
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2009-07-09 crypto: shash - Export/import hash state only
184 static int shash_no_export(struct shash_desc *desc, void *out)
dec8b786 »
2008-11-02 crypto: hash - Add import/export interface
185 {
99d27e1c »
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186 return -ENOSYS;
187 }
dec8b786 »
2008-11-02 crypto: hash - Add import/export interface
188
99d27e1c »
2009-07-09 crypto: shash - Export/import hash state only
189 static int shash_no_import(struct shash_desc *desc, const void *in)
190 {
191 return -ENOSYS;
dec8b786 »
2008-11-02 crypto: hash - Add import/export interface
192 }
193
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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
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2009-07-12 crypto: shash - Export async functions
213 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
3b2f6df0 »
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214 {
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 }
7eddf95e »
2009-07-12 crypto: shash - Export async functions
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 }
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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
7eddf95e »
2009-07-12 crypto: shash - Export async functions
236 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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)) {
244 void *data;
245
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);
7eddf95e »
2009-07-12 crypto: shash - Export async functions
251 } else
252 err = crypto_shash_init(desc) ?:
253 shash_ahash_update(req, desc) ?:
254 crypto_shash_final(desc, req->result);
3b2f6df0 »
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255
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256 return err;
257 }
258 EXPORT_SYMBOL_GPL(shash_ahash_digest);
3b2f6df0 »
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259
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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);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
264
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265 desc->tfm = *ctx;
266 desc->flags = req->base.flags;
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
267
7eddf95e »
2009-07-12 crypto: shash - Export async functions
268 return shash_ahash_digest(req, desc);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
269 }
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
88056ec3 »
2009-07-14 crypto: ahash - Convert to new style algorithms
278 int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
279 {
280 struct crypto_alg *calg = tfm->__crt_alg;
88056ec3 »
2009-07-14 crypto: ahash - Convert to new style algorithms
281 struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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
3f683d61 »
2009-02-18 crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention
288 shash = crypto_create_tfm(calg, &crypto_shash_type);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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
303 crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);
304
305 return 0;
306 }
307
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
308 static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key,
309 unsigned int keylen)
310 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
311 struct shash_desc **descp = crypto_hash_ctx(tfm);
312 struct shash_desc *desc = *descp;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
313
314 return crypto_shash_setkey(desc->tfm, key, keylen);
315 }
316
317 static int shash_compat_init(struct hash_desc *hdesc)
318 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
319 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
320 struct shash_desc *desc = *descp;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
330 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
331 struct shash_desc *desc = *descp;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
344 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
345
346 return crypto_shash_final(*descp, out);
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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)) {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
356 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
357 struct shash_desc *desc = *descp;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
385 struct shash_desc **descp = crypto_tfm_ctx(tfm);
386 struct shash_desc *desc = *descp;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
387
388 crypto_free_shash(desc->tfm);
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
389 kzfree(desc);
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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);
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
397 struct shash_desc **descp = crypto_tfm_ctx(tfm);
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
398 struct crypto_shash *shash;
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
399 struct shash_desc *desc;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
400
4abfd73e »
2009-02-05 crypto: shash - Fix module refcount
401 if (!crypto_mod_get(calg))
402 return -EAGAIN;
403
3f683d61 »
2009-02-18 crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention
404 shash = crypto_create_tfm(calg, &crypto_shash_type);
4abfd73e »
2009-02-05 crypto: shash - Fix module refcount
405 if (IS_ERR(shash)) {
406 crypto_mod_put(calg);
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
407 return PTR_ERR(shash);
4abfd73e »
2009-02-05 crypto: shash - Fix module refcount
408 }
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
409
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
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;
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
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
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
432 static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
433 {
434 switch (mask & CRYPTO_ALG_TYPE_MASK) {
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
435 case CRYPTO_ALG_TYPE_HASH_MASK:
436 return crypto_init_shash_ops_compat(tfm);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
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) {
5f7082ed »
2008-08-31 crypto: hash - Export shash through hash
446 case CRYPTO_ALG_TYPE_HASH_MASK:
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
447 return sizeof(struct shash_desc *);
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
448 }
449
450 return 0;
451 }
452
2ca33da1 »
2009-07-13 crypto: api - Remove frontend argument from extsize/init_tfm
453 static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
7b5a080b »
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454 {
113adefc »
2009-07-14 crypto: shash - Make descsize a run-time attribute
455 struct crypto_shash *hash = __crypto_shash_cast(tfm);
456
457 hash->descsize = crypto_shash_alg(hash)->descsize;
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
458 return 0;
459 }
460
2ca33da1 »
2009-07-13 crypto: api - Remove frontend argument from extsize/init_tfm
461 static unsigned int crypto_shash_extsize(struct crypto_alg *alg)
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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);
475 }
476
477 static const struct crypto_type crypto_shash_type = {
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
478 .ctxsize = crypto_shash_ctxsize,
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
479 .extsize = crypto_shash_extsize,
3b2f6df0 »
2008-08-31 crypto: hash - Export shash through ahash
480 .init = crypto_init_shash_ops,
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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 {
3f683d61 »
2009-02-18 crypto: api - Fix crypto_alloc_tfm/create_create_tfm return convention
494 return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
495 }
496 EXPORT_SYMBOL_GPL(crypto_alloc_shash);
497
619a6ebd »
2009-07-08 crypto: shash - Add shash_register_instance
498 static int shash_prepare_alg(struct shash_alg *alg)
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
499 {
500 struct crypto_alg *base = &alg->base;
501
502 if (alg->digestsize > PAGE_SIZE / 8 ||
99d27e1c »
2009-07-09 crypto: shash - Export/import hash state only
503 alg->descsize > PAGE_SIZE / 8 ||
504 alg->statesize > PAGE_SIZE / 8)
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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;
99d27e1c »
2009-07-09 crypto: shash - Export/import hash state only
510
8267adab »
2009-07-09 crypto: shash - Move finup/digest null checks to registration time
511 if (!alg->finup)
512 alg->finup = shash_finup_unaligned;
513 if (!alg->digest)
514 alg->digest = shash_digest_unaligned;
99d27e1c »
2009-07-09 crypto: shash - Export/import hash state only
515 if (!alg->import)
516 alg->import = shash_no_import;
517 if (!alg->export)
518 alg->export = shash_no_export;
57cfe44b »
2009-07-11 crypto: shash - Move null setkey check to registration time
519 if (!alg->setkey)
520 alg->setkey = shash_no_setkey;
99d27e1c »
2009-07-09 crypto: shash - Export/import hash state only
521
619a6ebd »
2009-07-08 crypto: shash - Add shash_register_instance
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;
7b5a080b »
2008-08-31 crypto: hash - Add shash interface
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
619a6ebd »
2009-07-08 crypto: shash - Add shash_register_instance
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
2e4fddd8 »
2009-07-07 crypto: shash - Add shash_instance
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
94296999 »
2009-07-08 crypto: shash - Add spawn support
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
7d6f5640 »
2009-07-08 crypto: shash - Add shash_attr_alg2 helper
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
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2008-08-31 crypto: hash - Add shash interface
583 MODULE_LICENSE("GPL");
584 MODULE_DESCRIPTION("Synchronous cryptographic hash type");
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