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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> | |
cce9e06d | 18 | |
4cc7720c | 19 | struct module; |
ebc610e5 | 20 | struct rtattr; |
e853c3cf HX |
21 | struct seq_file; |
22 | ||
23 | struct crypto_type { | |
27d2a330 | 24 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
2ca33da1 | 25 | unsigned int (*extsize)(struct crypto_alg *alg); |
27d2a330 | 26 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
2ca33da1 | 27 | int (*init_tfm)(struct crypto_tfm *tfm); |
e853c3cf | 28 | void (*show)(struct seq_file *m, struct crypto_alg *alg); |
7b0bac64 HX |
29 | struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); |
30 | ||
31 | unsigned int type; | |
32 | unsigned int maskclear; | |
33 | unsigned int maskset; | |
34 | unsigned int tfmsize; | |
e853c3cf | 35 | }; |
4cc7720c HX |
36 | |
37 | struct crypto_instance { | |
38 | struct crypto_alg alg; | |
39 | ||
40 | struct crypto_template *tmpl; | |
41 | struct hlist_node list; | |
42 | ||
43 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
44 | }; | |
45 | ||
46 | struct crypto_template { | |
47 | struct list_head list; | |
48 | struct hlist_head instances; | |
49 | struct module *module; | |
50 | ||
ebc610e5 | 51 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c | 52 | void (*free)(struct crypto_instance *inst); |
f2ac72e8 | 53 | int (*create)(struct crypto_template *tmpl, struct rtattr **tb); |
4cc7720c HX |
54 | |
55 | char name[CRYPTO_MAX_ALG_NAME]; | |
56 | }; | |
57 | ||
6bfd4809 HX |
58 | struct crypto_spawn { |
59 | struct list_head list; | |
60 | struct crypto_alg *alg; | |
61 | struct crypto_instance *inst; | |
97eedce1 | 62 | const struct crypto_type *frontend; |
a73e6996 | 63 | u32 mask; |
6bfd4809 HX |
64 | }; |
65 | ||
b5b7f088 HX |
66 | struct crypto_queue { |
67 | struct list_head list; | |
68 | struct list_head *backlog; | |
69 | ||
70 | unsigned int qlen; | |
71 | unsigned int max_qlen; | |
72 | }; | |
73 | ||
5c64097a HX |
74 | struct scatter_walk { |
75 | struct scatterlist *sg; | |
76 | unsigned int offset; | |
77 | }; | |
78 | ||
5cde0af2 HX |
79 | struct blkcipher_walk { |
80 | union { | |
81 | struct { | |
82 | struct page *page; | |
83 | unsigned long offset; | |
84 | } phys; | |
85 | ||
86 | struct { | |
87 | u8 *page; | |
88 | u8 *addr; | |
89 | } virt; | |
90 | } src, dst; | |
91 | ||
92 | struct scatter_walk in; | |
93 | unsigned int nbytes; | |
94 | ||
95 | struct scatter_walk out; | |
96 | unsigned int total; | |
97 | ||
98 | void *page; | |
99 | u8 *buffer; | |
100 | u8 *iv; | |
101 | ||
102 | int flags; | |
7607bd8f | 103 | unsigned int blocksize; |
5cde0af2 HX |
104 | }; |
105 | ||
b5b7f088 | 106 | extern const struct crypto_type crypto_ablkcipher_type; |
1ae97820 | 107 | extern const struct crypto_type crypto_aead_type; |
5cde0af2 HX |
108 | extern const struct crypto_type crypto_blkcipher_type; |
109 | ||
db131ef9 HX |
110 | void crypto_mod_put(struct crypto_alg *alg); |
111 | ||
4cc7720c HX |
112 | int crypto_register_template(struct crypto_template *tmpl); |
113 | void crypto_unregister_template(struct crypto_template *tmpl); | |
114 | struct crypto_template *crypto_lookup_template(const char *name); | |
115 | ||
9cd899a3 HX |
116 | int crypto_register_instance(struct crypto_template *tmpl, |
117 | struct crypto_instance *inst); | |
118 | ||
6bfd4809 | 119 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e6996 | 120 | struct crypto_instance *inst, u32 mask); |
97eedce1 HX |
121 | int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
122 | struct crypto_instance *inst, | |
123 | const struct crypto_type *frontend); | |
124 | ||
6bfd4809 | 125 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
2e306ee0 HX |
126 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
127 | u32 mask); | |
97eedce1 | 128 | void *crypto_spawn_tfm2(struct crypto_spawn *spawn); |
6bfd4809 | 129 | |
378f4f51 HX |
130 | static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
131 | struct crypto_instance *inst) | |
132 | { | |
133 | spawn->inst = inst; | |
134 | } | |
135 | ||
ebc610e5 HX |
136 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
137 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
68b6c7d6 | 138 | const char *crypto_attr_alg_name(struct rtattr *rta); |
d06854f0 HX |
139 | struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
140 | const struct crypto_type *frontend, | |
141 | u32 type, u32 mask); | |
142 | ||
143 | static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta, | |
144 | u32 type, u32 mask) | |
145 | { | |
146 | return crypto_attr_alg2(rta, NULL, type, mask); | |
147 | } | |
148 | ||
3c09f17c | 149 | int crypto_attr_u32(struct rtattr *rta, u32 *num); |
70ec7bb9 HX |
150 | void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
151 | unsigned int head); | |
7fed0bf2 HX |
152 | struct crypto_instance *crypto_alloc_instance(const char *name, |
153 | struct crypto_alg *alg); | |
154 | ||
b5b7f088 HX |
155 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
156 | int crypto_enqueue_request(struct crypto_queue *queue, | |
157 | struct crypto_async_request *request); | |
0c7d400f | 158 | void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset); |
b5b7f088 HX |
159 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
160 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); | |
161 | ||
7613636d HX |
162 | /* These functions require the input/output to be aligned as u32. */ |
163 | void crypto_inc(u8 *a, unsigned int size); | |
164 | void crypto_xor(u8 *dst, const u8 *src, unsigned int size); | |
165 | ||
5cde0af2 HX |
166 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
167 | struct blkcipher_walk *walk, int err); | |
168 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
169 | struct blkcipher_walk *walk); | |
170 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
171 | struct blkcipher_walk *walk); | |
7607bd8f HX |
172 | int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
173 | struct blkcipher_walk *walk, | |
174 | unsigned int blocksize); | |
5cde0af2 HX |
175 | |
176 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) | |
177 | { | |
ab300465 HX |
178 | return PTR_ALIGN(crypto_tfm_ctx(tfm), |
179 | crypto_tfm_alg_alignmask(tfm) + 1); | |
5cde0af2 HX |
180 | } |
181 | ||
124b53d0 HX |
182 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
183 | struct crypto_tfm *tfm) | |
184 | { | |
185 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); | |
186 | } | |
187 | ||
4cc7720c HX |
188 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
189 | { | |
190 | return inst->__ctx; | |
191 | } | |
192 | ||
b5b7f088 HX |
193 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
194 | struct crypto_ablkcipher *tfm) | |
195 | { | |
196 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; | |
197 | } | |
198 | ||
199 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) | |
200 | { | |
201 | return crypto_tfm_ctx(&tfm->base); | |
202 | } | |
203 | ||
aa379a6a SS |
204 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
205 | { | |
206 | return crypto_tfm_ctx_aligned(&tfm->base); | |
207 | } | |
208 | ||
1ae97820 HX |
209 | static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm) |
210 | { | |
211 | return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead; | |
212 | } | |
213 | ||
3c09f17c HX |
214 | static inline void *crypto_aead_ctx(struct crypto_aead *tfm) |
215 | { | |
216 | return crypto_tfm_ctx(&tfm->base); | |
217 | } | |
218 | ||
219 | static inline struct crypto_instance *crypto_aead_alg_instance( | |
220 | struct crypto_aead *aead) | |
221 | { | |
222 | return crypto_tfm_alg_instance(&aead->base); | |
223 | } | |
224 | ||
124b53d0 HX |
225 | static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
226 | struct crypto_spawn *spawn) | |
227 | { | |
228 | u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; | |
332f8840 | 229 | u32 mask = CRYPTO_ALG_TYPE_MASK; |
124b53d0 HX |
230 | |
231 | return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
232 | } | |
233 | ||
5cde0af2 HX |
234 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
235 | { | |
236 | return crypto_tfm_ctx(&tfm->base); | |
237 | } | |
238 | ||
239 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | |
240 | { | |
241 | return crypto_tfm_ctx_aligned(&tfm->base); | |
242 | } | |
243 | ||
2e306ee0 HX |
244 | static inline struct crypto_cipher *crypto_spawn_cipher( |
245 | struct crypto_spawn *spawn) | |
246 | { | |
247 | u32 type = CRYPTO_ALG_TYPE_CIPHER; | |
248 | u32 mask = CRYPTO_ALG_TYPE_MASK; | |
249 | ||
250 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
251 | } | |
252 | ||
f28776a3 HX |
253 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
254 | { | |
255 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | |
256 | } | |
257 | ||
2e306ee0 HX |
258 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
259 | { | |
260 | u32 type = CRYPTO_ALG_TYPE_HASH; | |
261 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; | |
262 | ||
263 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); | |
264 | } | |
265 | ||
5f7082ed HX |
266 | static inline void *crypto_hash_ctx(struct crypto_hash *tfm) |
267 | { | |
268 | return crypto_tfm_ctx(&tfm->base); | |
269 | } | |
270 | ||
055bcee3 HX |
271 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
272 | { | |
273 | return crypto_tfm_ctx_aligned(&tfm->base); | |
274 | } | |
275 | ||
5cde0af2 HX |
276 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
277 | struct scatterlist *dst, | |
278 | struct scatterlist *src, | |
279 | unsigned int nbytes) | |
280 | { | |
281 | walk->in.sg = src; | |
282 | walk->out.sg = dst; | |
283 | walk->total = nbytes; | |
284 | } | |
285 | ||
b5b7f088 HX |
286 | static inline struct crypto_async_request *crypto_get_backlog( |
287 | struct crypto_queue *queue) | |
288 | { | |
289 | return queue->backlog == &queue->list ? NULL : | |
290 | container_of(queue->backlog, struct crypto_async_request, list); | |
291 | } | |
292 | ||
2de98e75 | 293 | static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
b5b7f088 HX |
294 | struct ablkcipher_request *request) |
295 | { | |
2de98e75 | 296 | return crypto_enqueue_request(queue, &request->base); |
b5b7f088 HX |
297 | } |
298 | ||
299 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( | |
2de98e75 | 300 | struct crypto_queue *queue) |
b5b7f088 | 301 | { |
2de98e75 | 302 | return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
b5b7f088 HX |
303 | } |
304 | ||
305 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) | |
306 | { | |
307 | return req->__ctx; | |
308 | } | |
309 | ||
2de98e75 HX |
310 | static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
311 | struct crypto_ablkcipher *tfm) | |
b5b7f088 | 312 | { |
2de98e75 | 313 | return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
b5b7f088 HX |
314 | } |
315 | ||
3c09f17c HX |
316 | static inline void *aead_request_ctx(struct aead_request *req) |
317 | { | |
318 | return req->__ctx; | |
319 | } | |
320 | ||
321 | static inline void aead_request_complete(struct aead_request *req, int err) | |
322 | { | |
323 | req->base.complete(&req->base, err); | |
324 | } | |
325 | ||
326 | static inline u32 aead_request_flags(struct aead_request *req) | |
327 | { | |
328 | return req->base.flags; | |
329 | } | |
330 | ||
331 | static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, | |
332 | u32 type, u32 mask) | |
333 | { | |
334 | return crypto_attr_alg(tb[1], type, mask); | |
335 | } | |
336 | ||
378f4f51 HX |
337 | /* |
338 | * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. | |
339 | * Otherwise returns zero. | |
340 | */ | |
341 | static inline int crypto_requires_sync(u32 type, u32 mask) | |
342 | { | |
343 | return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; | |
344 | } | |
345 | ||
cce9e06d HX |
346 | #endif /* _CRYPTO_ALGAPI_H */ |
347 |