2 * Cryptographic API for algorithms (i.e., low-level API).
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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)
12 #ifndef _CRYPTO_ALGAPI_H
13 #define _CRYPTO_ALGAPI_H
15 #include <linux/crypto.h>
16 #include <linux/list.h>
17 #include <linux/kernel.h>
24 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
25 unsigned int (*extsize)(struct crypto_alg *alg);
26 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
27 int (*init_tfm)(struct crypto_tfm *tfm);
28 void (*show)(struct seq_file *m, struct crypto_alg *alg);
29 struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
32 unsigned int maskclear;
37 struct crypto_instance {
38 struct crypto_alg alg;
40 struct crypto_template *tmpl;
41 struct hlist_node list;
43 void *__ctx[] CRYPTO_MINALIGN_ATTR;
46 struct crypto_template {
47 struct list_head list;
48 struct hlist_head instances;
49 struct module *module;
51 struct crypto_instance *(*alloc)(struct rtattr **tb);
52 void (*free)(struct crypto_instance *inst);
53 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
55 char name[CRYPTO_MAX_ALG_NAME];
59 struct list_head list;
60 struct crypto_alg *alg;
61 struct crypto_instance *inst;
62 const struct crypto_type *frontend;
67 struct list_head list;
68 struct list_head *backlog;
71 unsigned int max_qlen;
75 struct scatterlist *sg;
79 struct blkcipher_walk {
92 struct scatter_walk in;
95 struct scatter_walk out;
103 unsigned int blocksize;
106 struct ablkcipher_walk {
112 struct scatter_walk in;
114 struct scatter_walk out;
116 struct list_head buffers;
120 unsigned int blocksize;
123 extern const struct crypto_type crypto_ablkcipher_type;
124 extern const struct crypto_type crypto_aead_type;
125 extern const struct crypto_type crypto_blkcipher_type;
127 void crypto_mod_put(struct crypto_alg *alg);
129 int crypto_register_template(struct crypto_template *tmpl);
130 void crypto_unregister_template(struct crypto_template *tmpl);
131 struct crypto_template *crypto_lookup_template(const char *name);
133 int crypto_register_instance(struct crypto_template *tmpl,
134 struct crypto_instance *inst);
136 int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
137 struct crypto_instance *inst, u32 mask);
138 int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
139 struct crypto_instance *inst,
140 const struct crypto_type *frontend);
142 void crypto_drop_spawn(struct crypto_spawn *spawn);
143 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
145 void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
147 static inline void crypto_set_spawn(struct crypto_spawn *spawn,
148 struct crypto_instance *inst)
153 struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
154 int crypto_check_attr_type(struct rtattr **tb, u32 type);
155 const char *crypto_attr_alg_name(struct rtattr *rta);
156 struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
157 const struct crypto_type *frontend,
160 static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
163 return crypto_attr_alg2(rta, NULL, type, mask);
166 int crypto_attr_u32(struct rtattr *rta, u32 *num);
167 void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
169 struct crypto_instance *crypto_alloc_instance(const char *name,
170 struct crypto_alg *alg);
172 void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
173 int crypto_enqueue_request(struct crypto_queue *queue,
174 struct crypto_async_request *request);
175 void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
176 struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
177 int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
179 /* These functions require the input/output to be aligned as u32. */
180 void crypto_inc(u8 *a, unsigned int size);
181 void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
183 int blkcipher_walk_done(struct blkcipher_desc *desc,
184 struct blkcipher_walk *walk, int err);
185 int blkcipher_walk_virt(struct blkcipher_desc *desc,
186 struct blkcipher_walk *walk);
187 int blkcipher_walk_phys(struct blkcipher_desc *desc,
188 struct blkcipher_walk *walk);
189 int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
190 struct blkcipher_walk *walk,
191 unsigned int blocksize);
193 int ablkcipher_walk_done(struct ablkcipher_request *req,
194 struct ablkcipher_walk *walk, int err);
195 int ablkcipher_walk_phys(struct ablkcipher_request *req,
196 struct ablkcipher_walk *walk);
197 void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
199 static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
201 return PTR_ALIGN(crypto_tfm_ctx(tfm),
202 crypto_tfm_alg_alignmask(tfm) + 1);
205 static inline struct crypto_instance *crypto_tfm_alg_instance(
206 struct crypto_tfm *tfm)
208 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
211 static inline void *crypto_instance_ctx(struct crypto_instance *inst)
216 static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
217 struct crypto_ablkcipher *tfm)
219 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
222 static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
224 return crypto_tfm_ctx(&tfm->base);
227 static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
229 return crypto_tfm_ctx_aligned(&tfm->base);
232 static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
234 return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
237 static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
239 return crypto_tfm_ctx(&tfm->base);
242 static inline struct crypto_instance *crypto_aead_alg_instance(
243 struct crypto_aead *aead)
245 return crypto_tfm_alg_instance(&aead->base);
248 static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
249 struct crypto_spawn *spawn)
251 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
252 u32 mask = CRYPTO_ALG_TYPE_MASK;
254 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
257 static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
259 return crypto_tfm_ctx(&tfm->base);
262 static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
264 return crypto_tfm_ctx_aligned(&tfm->base);
267 static inline struct crypto_cipher *crypto_spawn_cipher(
268 struct crypto_spawn *spawn)
270 u32 type = CRYPTO_ALG_TYPE_CIPHER;
271 u32 mask = CRYPTO_ALG_TYPE_MASK;
273 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
276 static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
278 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
281 static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
283 u32 type = CRYPTO_ALG_TYPE_HASH;
284 u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
286 return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
289 static inline void *crypto_hash_ctx(struct crypto_hash *tfm)
291 return crypto_tfm_ctx(&tfm->base);
294 static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
296 return crypto_tfm_ctx_aligned(&tfm->base);
299 static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
300 struct scatterlist *dst,
301 struct scatterlist *src,
306 walk->total = nbytes;
309 static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
310 struct scatterlist *dst,
311 struct scatterlist *src,
316 walk->total = nbytes;
317 INIT_LIST_HEAD(&walk->buffers);
320 static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
322 if (unlikely(!list_empty(&walk->buffers)))
323 __ablkcipher_walk_complete(walk);
326 static inline struct crypto_async_request *crypto_get_backlog(
327 struct crypto_queue *queue)
329 return queue->backlog == &queue->list ? NULL :
330 container_of(queue->backlog, struct crypto_async_request, list);
333 static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
334 struct ablkcipher_request *request)
336 return crypto_enqueue_request(queue, &request->base);
339 static inline struct ablkcipher_request *ablkcipher_dequeue_request(
340 struct crypto_queue *queue)
342 return ablkcipher_request_cast(crypto_dequeue_request(queue));
345 static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
350 static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
351 struct crypto_ablkcipher *tfm)
353 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
356 static inline void *aead_request_ctx(struct aead_request *req)
361 static inline void aead_request_complete(struct aead_request *req, int err)
363 req->base.complete(&req->base, err);
366 static inline u32 aead_request_flags(struct aead_request *req)
368 return req->base.flags;
371 static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
374 return crypto_attr_alg(tb[1], type, mask);
378 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
379 * Otherwise returns zero.
381 static inline int crypto_requires_sync(u32 type, u32 mask)
383 return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
386 #endif /* _CRYPTO_ALGAPI_H */