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cce9e06d HX |
1 | /* |
2 | * Cryptographic API for algorithms (i.e., low-level API). | |
3 | * | |
4 | * Copyright (c) 2006 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 | #ifndef _CRYPTO_ALGAPI_H | |
13 | #define _CRYPTO_ALGAPI_H | |
14 | ||
15 | #include <linux/crypto.h> | |
b5b7f088 HX |
16 | #include <linux/list.h> |
17 | #include <linux/kernel.h> | |
b6aa63c0 | 18 | #include <linux/skbuff.h> |
cce9e06d | 19 | |
5d1d65f8 | 20 | struct crypto_aead; |
319382a6 | 21 | struct crypto_instance; |
4cc7720c | 22 | struct module; |
ebc610e5 | 23 | struct rtattr; |
e853c3cf HX |
24 | struct seq_file; |
25 | ||
26 | struct crypto_type { | |
27d2a330 | 27 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
2ca33da1 | 28 | unsigned int (*extsize)(struct crypto_alg *alg); |
27d2a330 | 29 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
2ca33da1 | 30 | int (*init_tfm)(struct crypto_tfm *tfm); |
e853c3cf | 31 | void (*show)(struct seq_file *m, struct crypto_alg *alg); |
b6aa63c0 | 32 | int (*report)(struct sk_buff *skb, struct crypto_alg *alg); |
7b0bac64 | 33 | struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); |
319382a6 | 34 | void (*free)(struct crypto_instance *inst); |
7b0bac64 HX |
35 | |
36 | unsigned int type; | |
37 | unsigned int maskclear; | |
38 | unsigned int maskset; | |
39 | unsigned int tfmsize; | |
e853c3cf | 40 | }; |
4cc7720c HX |
41 | |
42 | struct crypto_instance { | |
43 | struct crypto_alg alg; | |
44 | ||
45 | struct crypto_template *tmpl; | |
46 | struct hlist_node list; | |
47 | ||
48 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
49 | }; | |
50 | ||
51 | struct crypto_template { | |
52 | struct list_head list; | |
53 | struct hlist_head instances; | |
54 | struct module *module; | |
55 | ||
ebc610e5 | 56 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c | 57 | void (*free)(struct crypto_instance *inst); |
f2ac72e8 | 58 | int (*create)(struct crypto_template *tmpl, struct rtattr **tb); |
4cc7720c HX |
59 | |
60 | char name[CRYPTO_MAX_ALG_NAME]; | |
61 | }; | |
62 | ||
6bfd4809 HX |
63 | struct crypto_spawn { |
64 | struct list_head list; | |
65 | struct crypto_alg *alg; | |
66 | struct crypto_instance *inst; | |
97eedce1 | 67 | const struct crypto_type *frontend; |
a73e6996 | 68 | u32 mask; |
6bfd4809 HX |
69 | }; |
70 | ||
b5b7f088 HX |
71 | struct crypto_queue { |
72 | struct list_head list; | |
73 | struct list_head *backlog; | |
74 | ||
75 | unsigned int qlen; | |
76 | unsigned int max_qlen; | |
77 | }; | |
78 | ||
5c64097a HX |
79 | struct scatter_walk { |
80 | struct scatterlist *sg; | |
81 | unsigned int offset; | |
82 | }; | |
83 | ||
5cde0af2 HX |
84 | struct blkcipher_walk { |
85 | union { | |
86 | struct { | |
87 | struct page *page; | |
88 | unsigned long offset; | |
89 | } phys; | |
90 | ||
91 | struct { | |
92 | u8 *page; | |
93 | u8 *addr; | |
94 | } virt; | |
95 | } src, dst; | |
96 | ||
97 | struct scatter_walk in; | |
98 | unsigned int nbytes; | |
99 | ||
100 | struct scatter_walk out; | |
101 | unsigned int total; | |
102 | ||
103 | void *page; | |
104 | u8 *buffer; | |
105 | u8 *iv; | |
822be00f | 106 | unsigned int ivsize; |
5cde0af2 HX |
107 | |
108 | int flags; | |
822be00f AB |
109 | unsigned int walk_blocksize; |
110 | unsigned int cipher_blocksize; | |
111 | unsigned int alignmask; | |
5cde0af2 HX |
112 | }; |
113 | ||
bf06099d DM |
114 | struct ablkcipher_walk { |
115 | struct { | |
116 | struct page *page; | |
117 | unsigned int offset; | |
118 | } src, dst; | |
119 | ||
120 | struct scatter_walk in; | |
121 | unsigned int nbytes; | |
122 | struct scatter_walk out; | |
123 | unsigned int total; | |
124 | struct list_head buffers; | |
125 | u8 *iv_buffer; | |
126 | u8 *iv; | |
127 | int flags; | |
128 | unsigned int blocksize; | |
129 | }; | |
130 | ||
b5b7f088 | 131 | extern const struct crypto_type crypto_ablkcipher_type; |
5cde0af2 HX |
132 | extern const struct crypto_type crypto_blkcipher_type; |
133 | ||
db131ef9 HX |
134 | void crypto_mod_put(struct crypto_alg *alg); |
135 | ||
4cc7720c HX |
136 | int crypto_register_template(struct crypto_template *tmpl); |
137 | void crypto_unregister_template(struct crypto_template *tmpl); | |
138 | struct crypto_template *crypto_lookup_template(const char *name); | |
139 | ||
9cd899a3 HX |
140 | int crypto_register_instance(struct crypto_template *tmpl, |
141 | struct crypto_instance *inst); | |
87b16756 | 142 | int crypto_unregister_instance(struct crypto_instance *inst); |
9cd899a3 | 143 | |
6bfd4809 | 144 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e6996 | 145 | struct crypto_instance *inst, u32 mask); |
97eedce1 HX |
146 | int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
147 | struct crypto_instance *inst, | |
148 | const struct crypto_type *frontend); | |
d6ef2f19 HX |
149 | int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, |
150 | u32 type, u32 mask); | |
97eedce1 | 151 | |
6bfd4809 | 152 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
2e306ee0 HX |
153 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
154 | u32 mask); | |
97eedce1 | 155 | void *crypto_spawn_tfm2(struct crypto_spawn *spawn); |
6bfd4809 | 156 | |
378f4f51 HX |
157 | static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
158 | struct crypto_instance *inst) | |
159 | { | |
160 | spawn->inst = inst; | |
161 | } | |
162 | ||
ebc610e5 HX |
163 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
164 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
68b6c7d6 | 165 | const char *crypto_attr_alg_name(struct rtattr *rta); |
d06854f0 HX |
166 | struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
167 | const struct crypto_type *frontend, | |
168 | u32 type, u32 mask); | |
169 | ||
170 | static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta, | |
171 | u32 type, u32 mask) | |
172 | { | |
173 | return crypto_attr_alg2(rta, NULL, type, mask); | |
174 | } | |
175 | ||
3c09f17c | 176 | int crypto_attr_u32(struct rtattr *rta, u32 *num); |
32f27c74 HX |
177 | int crypto_inst_setname(struct crypto_instance *inst, const char *name, |
178 | struct crypto_alg *alg); | |
70ec7bb9 HX |
179 | void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
180 | unsigned int head); | |
7fed0bf2 HX |
181 | struct crypto_instance *crypto_alloc_instance(const char *name, |
182 | struct crypto_alg *alg); | |
183 | ||
b5b7f088 HX |
184 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
185 | int crypto_enqueue_request(struct crypto_queue *queue, | |
186 | struct crypto_async_request *request); | |
187 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); | |
188 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); | |
9f93a8a0 BW |
189 | static inline unsigned int crypto_queue_len(struct crypto_queue *queue) |
190 | { | |
191 | return queue->qlen; | |
192 | } | |
b5b7f088 | 193 | |
7613636d HX |
194 | /* These functions require the input/output to be aligned as u32. */ |
195 | void crypto_inc(u8 *a, unsigned int size); | |
196 | void crypto_xor(u8 *dst, const u8 *src, unsigned int size); | |
197 | ||
5cde0af2 HX |
198 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
199 | struct blkcipher_walk *walk, int err); | |
200 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
201 | struct blkcipher_walk *walk); | |
202 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
203 | struct blkcipher_walk *walk); | |
7607bd8f HX |
204 | int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
205 | struct blkcipher_walk *walk, | |
206 | unsigned int blocksize); | |
4f7f1d7c AB |
207 | int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, |
208 | struct blkcipher_walk *walk, | |
209 | struct crypto_aead *tfm, | |
210 | unsigned int blocksize); | |
5cde0af2 | 211 | |
bf06099d DM |
212 | int ablkcipher_walk_done(struct ablkcipher_request *req, |
213 | struct ablkcipher_walk *walk, int err); | |
214 | int ablkcipher_walk_phys(struct ablkcipher_request *req, | |
215 | struct ablkcipher_walk *walk); | |
216 | void __ablkcipher_walk_complete(struct ablkcipher_walk *walk); | |
217 | ||
5cde0af2 HX |
218 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
219 | { | |
ab300465 HX |
220 | return PTR_ALIGN(crypto_tfm_ctx(tfm), |
221 | crypto_tfm_alg_alignmask(tfm) + 1); | |
5cde0af2 HX |
222 | } |
223 | ||
124b53d0 HX |
224 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
225 | struct crypto_tfm *tfm) | |
226 | { | |
227 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); | |
228 | } | |
229 | ||
4cc7720c HX |
230 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
231 | { | |
232 | return inst->__ctx; | |
233 | } | |
234 | ||
b5b7f088 HX |
235 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
236 | struct crypto_ablkcipher *tfm) | |
237 | { | |
238 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; | |
239 | } | |
240 | ||
241 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) | |
242 | { | |
243 | return crypto_tfm_ctx(&tfm->base); | |
244 | } | |
245 | ||
aa379a6a SS |
246 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
247 | { | |
248 | return crypto_tfm_ctx_aligned(&tfm->base); | |
249 | } | |
250 | ||
124b53d0 HX |
251 | static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
252 | struct crypto_spawn *spawn) | |
253 | { | |
254 | u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; | |
332f8840 | 255 | u32 mask = CRYPTO_ALG_TYPE_MASK; |
124b53d0 HX |
256 | |
257 | return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
258 | } | |
259 | ||
5cde0af2 HX |
260 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
261 | { | |
262 | return crypto_tfm_ctx(&tfm->base); | |
263 | } | |
264 | ||
265 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | |
266 | { | |
267 | return crypto_tfm_ctx_aligned(&tfm->base); | |
268 | } | |
269 | ||
2e306ee0 HX |
270 | static inline struct crypto_cipher *crypto_spawn_cipher( |
271 | struct crypto_spawn *spawn) | |
272 | { | |
273 | u32 type = CRYPTO_ALG_TYPE_CIPHER; | |
274 | u32 mask = CRYPTO_ALG_TYPE_MASK; | |
275 | ||
276 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
277 | } | |
278 | ||
f28776a3 HX |
279 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
280 | { | |
281 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | |
282 | } | |
283 | ||
5cde0af2 HX |
284 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
285 | struct scatterlist *dst, | |
286 | struct scatterlist *src, | |
287 | unsigned int nbytes) | |
288 | { | |
289 | walk->in.sg = src; | |
290 | walk->out.sg = dst; | |
291 | walk->total = nbytes; | |
292 | } | |
293 | ||
bf06099d DM |
294 | static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk, |
295 | struct scatterlist *dst, | |
296 | struct scatterlist *src, | |
297 | unsigned int nbytes) | |
298 | { | |
299 | walk->in.sg = src; | |
300 | walk->out.sg = dst; | |
301 | walk->total = nbytes; | |
302 | INIT_LIST_HEAD(&walk->buffers); | |
303 | } | |
304 | ||
305 | static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk) | |
306 | { | |
307 | if (unlikely(!list_empty(&walk->buffers))) | |
308 | __ablkcipher_walk_complete(walk); | |
309 | } | |
310 | ||
b5b7f088 HX |
311 | static inline struct crypto_async_request *crypto_get_backlog( |
312 | struct crypto_queue *queue) | |
313 | { | |
314 | return queue->backlog == &queue->list ? NULL : | |
315 | container_of(queue->backlog, struct crypto_async_request, list); | |
316 | } | |
317 | ||
2de98e75 | 318 | static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
b5b7f088 HX |
319 | struct ablkcipher_request *request) |
320 | { | |
2de98e75 | 321 | return crypto_enqueue_request(queue, &request->base); |
b5b7f088 HX |
322 | } |
323 | ||
324 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( | |
2de98e75 | 325 | struct crypto_queue *queue) |
b5b7f088 | 326 | { |
2de98e75 | 327 | return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
b5b7f088 HX |
328 | } |
329 | ||
330 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) | |
331 | { | |
332 | return req->__ctx; | |
333 | } | |
334 | ||
2de98e75 HX |
335 | static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
336 | struct crypto_ablkcipher *tfm) | |
b5b7f088 | 337 | { |
2de98e75 | 338 | return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
b5b7f088 HX |
339 | } |
340 | ||
3c09f17c HX |
341 | static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, |
342 | u32 type, u32 mask) | |
343 | { | |
344 | return crypto_attr_alg(tb[1], type, mask); | |
345 | } | |
346 | ||
378f4f51 HX |
347 | /* |
348 | * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. | |
349 | * Otherwise returns zero. | |
350 | */ | |
351 | static inline int crypto_requires_sync(u32 type, u32 mask) | |
352 | { | |
353 | return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; | |
354 | } | |
355 | ||
6bf37e5a JY |
356 | noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size); |
357 | ||
358 | /** | |
359 | * crypto_memneq - Compare two areas of memory without leaking | |
360 | * timing information. | |
361 | * | |
362 | * @a: One area of memory | |
363 | * @b: Another area of memory | |
364 | * @size: The size of the area. | |
365 | * | |
366 | * Returns 0 when data is equal, 1 otherwise. | |
367 | */ | |
368 | static inline int crypto_memneq(const void *a, const void *b, size_t size) | |
369 | { | |
370 | return __crypto_memneq(a, b, size) != 0UL ? 1 : 0; | |
371 | } | |
cce9e06d | 372 | |
bb55a4c1 MV |
373 | static inline void crypto_yield(u32 flags) |
374 | { | |
41401397 | 375 | #if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY) |
bb55a4c1 MV |
376 | if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
377 | cond_resched(); | |
41401397 | 378 | #endif |
bb55a4c1 MV |
379 | } |
380 | ||
6bf37e5a | 381 | #endif /* _CRYPTO_ALGAPI_H */ |