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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 | |
4cc7720c | 20 | struct module; |
ebc610e5 | 21 | struct rtattr; |
e853c3cf HX |
22 | struct seq_file; |
23 | ||
24 | struct crypto_type { | |
27d2a330 | 25 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
2ca33da1 | 26 | unsigned int (*extsize)(struct crypto_alg *alg); |
27d2a330 | 27 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
2ca33da1 | 28 | int (*init_tfm)(struct crypto_tfm *tfm); |
e853c3cf | 29 | void (*show)(struct seq_file *m, struct crypto_alg *alg); |
b6aa63c0 | 30 | int (*report)(struct sk_buff *skb, struct crypto_alg *alg); |
7b0bac64 HX |
31 | struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); |
32 | ||
33 | unsigned int type; | |
34 | unsigned int maskclear; | |
35 | unsigned int maskset; | |
36 | unsigned int tfmsize; | |
e853c3cf | 37 | }; |
4cc7720c HX |
38 | |
39 | struct crypto_instance { | |
40 | struct crypto_alg alg; | |
41 | ||
42 | struct crypto_template *tmpl; | |
43 | struct hlist_node list; | |
44 | ||
45 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
46 | }; | |
47 | ||
48 | struct crypto_template { | |
49 | struct list_head list; | |
50 | struct hlist_head instances; | |
51 | struct module *module; | |
52 | ||
ebc610e5 | 53 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c | 54 | void (*free)(struct crypto_instance *inst); |
f2ac72e8 | 55 | int (*create)(struct crypto_template *tmpl, struct rtattr **tb); |
4cc7720c HX |
56 | |
57 | char name[CRYPTO_MAX_ALG_NAME]; | |
58 | }; | |
59 | ||
6bfd4809 HX |
60 | struct crypto_spawn { |
61 | struct list_head list; | |
62 | struct crypto_alg *alg; | |
63 | struct crypto_instance *inst; | |
97eedce1 | 64 | const struct crypto_type *frontend; |
a73e6996 | 65 | u32 mask; |
6bfd4809 HX |
66 | }; |
67 | ||
b5b7f088 HX |
68 | struct crypto_queue { |
69 | struct list_head list; | |
70 | struct list_head *backlog; | |
71 | ||
72 | unsigned int qlen; | |
73 | unsigned int max_qlen; | |
74 | }; | |
75 | ||
5c64097a HX |
76 | struct scatter_walk { |
77 | struct scatterlist *sg; | |
78 | unsigned int offset; | |
79 | }; | |
80 | ||
5cde0af2 HX |
81 | struct blkcipher_walk { |
82 | union { | |
83 | struct { | |
84 | struct page *page; | |
85 | unsigned long offset; | |
86 | } phys; | |
87 | ||
88 | struct { | |
89 | u8 *page; | |
90 | u8 *addr; | |
91 | } virt; | |
92 | } src, dst; | |
93 | ||
94 | struct scatter_walk in; | |
95 | unsigned int nbytes; | |
96 | ||
97 | struct scatter_walk out; | |
98 | unsigned int total; | |
99 | ||
100 | void *page; | |
101 | u8 *buffer; | |
102 | u8 *iv; | |
103 | ||
104 | int flags; | |
7607bd8f | 105 | unsigned int blocksize; |
5cde0af2 HX |
106 | }; |
107 | ||
bf06099d DM |
108 | struct ablkcipher_walk { |
109 | struct { | |
110 | struct page *page; | |
111 | unsigned int offset; | |
112 | } src, dst; | |
113 | ||
114 | struct scatter_walk in; | |
115 | unsigned int nbytes; | |
116 | struct scatter_walk out; | |
117 | unsigned int total; | |
118 | struct list_head buffers; | |
119 | u8 *iv_buffer; | |
120 | u8 *iv; | |
121 | int flags; | |
122 | unsigned int blocksize; | |
123 | }; | |
124 | ||
b5b7f088 | 125 | extern const struct crypto_type crypto_ablkcipher_type; |
1ae97820 | 126 | extern const struct crypto_type crypto_aead_type; |
5cde0af2 HX |
127 | extern const struct crypto_type crypto_blkcipher_type; |
128 | ||
db131ef9 HX |
129 | void crypto_mod_put(struct crypto_alg *alg); |
130 | ||
4cc7720c HX |
131 | int crypto_register_template(struct crypto_template *tmpl); |
132 | void crypto_unregister_template(struct crypto_template *tmpl); | |
133 | struct crypto_template *crypto_lookup_template(const char *name); | |
134 | ||
9cd899a3 HX |
135 | int crypto_register_instance(struct crypto_template *tmpl, |
136 | struct crypto_instance *inst); | |
ce3fd840 | 137 | int crypto_unregister_instance(struct crypto_alg *alg); |
9cd899a3 | 138 | |
6bfd4809 | 139 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e6996 | 140 | struct crypto_instance *inst, u32 mask); |
97eedce1 HX |
141 | int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
142 | struct crypto_instance *inst, | |
143 | const struct crypto_type *frontend); | |
144 | ||
6bfd4809 | 145 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
2e306ee0 HX |
146 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
147 | u32 mask); | |
97eedce1 | 148 | void *crypto_spawn_tfm2(struct crypto_spawn *spawn); |
6bfd4809 | 149 | |
378f4f51 HX |
150 | static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
151 | struct crypto_instance *inst) | |
152 | { | |
153 | spawn->inst = inst; | |
154 | } | |
155 | ||
ebc610e5 HX |
156 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
157 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
68b6c7d6 | 158 | const char *crypto_attr_alg_name(struct rtattr *rta); |
d06854f0 HX |
159 | struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
160 | const struct crypto_type *frontend, | |
161 | u32 type, u32 mask); | |
162 | ||
163 | static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta, | |
164 | u32 type, u32 mask) | |
165 | { | |
166 | return crypto_attr_alg2(rta, NULL, type, mask); | |
167 | } | |
168 | ||
3c09f17c | 169 | int crypto_attr_u32(struct rtattr *rta, u32 *num); |
70ec7bb9 HX |
170 | void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
171 | unsigned int head); | |
7fed0bf2 HX |
172 | struct crypto_instance *crypto_alloc_instance(const char *name, |
173 | struct crypto_alg *alg); | |
174 | ||
b5b7f088 HX |
175 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
176 | int crypto_enqueue_request(struct crypto_queue *queue, | |
177 | struct crypto_async_request *request); | |
0c7d400f | 178 | void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset); |
b5b7f088 HX |
179 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
180 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); | |
181 | ||
7613636d HX |
182 | /* These functions require the input/output to be aligned as u32. */ |
183 | void crypto_inc(u8 *a, unsigned int size); | |
184 | void crypto_xor(u8 *dst, const u8 *src, unsigned int size); | |
185 | ||
5cde0af2 HX |
186 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
187 | struct blkcipher_walk *walk, int err); | |
188 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
189 | struct blkcipher_walk *walk); | |
190 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
191 | struct blkcipher_walk *walk); | |
7607bd8f HX |
192 | int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
193 | struct blkcipher_walk *walk, | |
194 | unsigned int blocksize); | |
5cde0af2 | 195 | |
bf06099d DM |
196 | int ablkcipher_walk_done(struct ablkcipher_request *req, |
197 | struct ablkcipher_walk *walk, int err); | |
198 | int ablkcipher_walk_phys(struct ablkcipher_request *req, | |
199 | struct ablkcipher_walk *walk); | |
200 | void __ablkcipher_walk_complete(struct ablkcipher_walk *walk); | |
201 | ||
5cde0af2 HX |
202 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
203 | { | |
ab300465 HX |
204 | return PTR_ALIGN(crypto_tfm_ctx(tfm), |
205 | crypto_tfm_alg_alignmask(tfm) + 1); | |
5cde0af2 HX |
206 | } |
207 | ||
124b53d0 HX |
208 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
209 | struct crypto_tfm *tfm) | |
210 | { | |
211 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); | |
212 | } | |
213 | ||
4cc7720c HX |
214 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
215 | { | |
216 | return inst->__ctx; | |
217 | } | |
218 | ||
b5b7f088 HX |
219 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
220 | struct crypto_ablkcipher *tfm) | |
221 | { | |
222 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; | |
223 | } | |
224 | ||
225 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) | |
226 | { | |
227 | return crypto_tfm_ctx(&tfm->base); | |
228 | } | |
229 | ||
aa379a6a SS |
230 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
231 | { | |
232 | return crypto_tfm_ctx_aligned(&tfm->base); | |
233 | } | |
234 | ||
1ae97820 HX |
235 | static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm) |
236 | { | |
237 | return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead; | |
238 | } | |
239 | ||
3c09f17c HX |
240 | static inline void *crypto_aead_ctx(struct crypto_aead *tfm) |
241 | { | |
242 | return crypto_tfm_ctx(&tfm->base); | |
243 | } | |
244 | ||
245 | static inline struct crypto_instance *crypto_aead_alg_instance( | |
246 | struct crypto_aead *aead) | |
247 | { | |
248 | return crypto_tfm_alg_instance(&aead->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 | ||
2e306ee0 HX |
284 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
285 | { | |
286 | u32 type = CRYPTO_ALG_TYPE_HASH; | |
287 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; | |
288 | ||
289 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); | |
290 | } | |
291 | ||
5f7082ed HX |
292 | static inline void *crypto_hash_ctx(struct crypto_hash *tfm) |
293 | { | |
294 | return crypto_tfm_ctx(&tfm->base); | |
295 | } | |
296 | ||
055bcee3 HX |
297 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
298 | { | |
299 | return crypto_tfm_ctx_aligned(&tfm->base); | |
300 | } | |
301 | ||
5cde0af2 HX |
302 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
303 | struct scatterlist *dst, | |
304 | struct scatterlist *src, | |
305 | unsigned int nbytes) | |
306 | { | |
307 | walk->in.sg = src; | |
308 | walk->out.sg = dst; | |
309 | walk->total = nbytes; | |
310 | } | |
311 | ||
bf06099d DM |
312 | static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk, |
313 | struct scatterlist *dst, | |
314 | struct scatterlist *src, | |
315 | unsigned int nbytes) | |
316 | { | |
317 | walk->in.sg = src; | |
318 | walk->out.sg = dst; | |
319 | walk->total = nbytes; | |
320 | INIT_LIST_HEAD(&walk->buffers); | |
321 | } | |
322 | ||
323 | static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk) | |
324 | { | |
325 | if (unlikely(!list_empty(&walk->buffers))) | |
326 | __ablkcipher_walk_complete(walk); | |
327 | } | |
328 | ||
b5b7f088 HX |
329 | static inline struct crypto_async_request *crypto_get_backlog( |
330 | struct crypto_queue *queue) | |
331 | { | |
332 | return queue->backlog == &queue->list ? NULL : | |
333 | container_of(queue->backlog, struct crypto_async_request, list); | |
334 | } | |
335 | ||
2de98e75 | 336 | static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
b5b7f088 HX |
337 | struct ablkcipher_request *request) |
338 | { | |
2de98e75 | 339 | return crypto_enqueue_request(queue, &request->base); |
b5b7f088 HX |
340 | } |
341 | ||
342 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( | |
2de98e75 | 343 | struct crypto_queue *queue) |
b5b7f088 | 344 | { |
2de98e75 | 345 | return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
b5b7f088 HX |
346 | } |
347 | ||
348 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) | |
349 | { | |
350 | return req->__ctx; | |
351 | } | |
352 | ||
2de98e75 HX |
353 | static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
354 | struct crypto_ablkcipher *tfm) | |
b5b7f088 | 355 | { |
2de98e75 | 356 | return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
b5b7f088 HX |
357 | } |
358 | ||
3c09f17c HX |
359 | static inline void *aead_request_ctx(struct aead_request *req) |
360 | { | |
361 | return req->__ctx; | |
362 | } | |
363 | ||
364 | static inline void aead_request_complete(struct aead_request *req, int err) | |
365 | { | |
366 | req->base.complete(&req->base, err); | |
367 | } | |
368 | ||
369 | static inline u32 aead_request_flags(struct aead_request *req) | |
370 | { | |
371 | return req->base.flags; | |
372 | } | |
373 | ||
374 | static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, | |
375 | u32 type, u32 mask) | |
376 | { | |
377 | return crypto_attr_alg(tb[1], type, mask); | |
378 | } | |
379 | ||
378f4f51 HX |
380 | /* |
381 | * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. | |
382 | * Otherwise returns zero. | |
383 | */ | |
384 | static inline int crypto_requires_sync(u32 type, u32 mask) | |
385 | { | |
386 | return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; | |
387 | } | |
388 | ||
cce9e06d HX |
389 | #endif /* _CRYPTO_ALGAPI_H */ |
390 |