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