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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>
16#include <linux/list.h>
17#include <linux/kernel.h>
18#include <linux/skbuff.h>
19
20struct crypto_aead;
21struct crypto_instance;
22struct module;
23struct rtattr;
24struct seq_file;
25
26struct crypto_type {
27 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
28 unsigned int (*extsize)(struct crypto_alg *alg);
29 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
30 int (*init_tfm)(struct crypto_tfm *tfm);
31 void (*show)(struct seq_file *m, struct crypto_alg *alg);
32 int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
33 struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
34 void (*free)(struct crypto_instance *inst);
35
36 unsigned int type;
37 unsigned int maskclear;
38 unsigned int maskset;
39 unsigned int tfmsize;
40};
41
42struct 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
51struct crypto_template {
52 struct list_head list;
53 struct hlist_head instances;
54 struct module *module;
55
56 struct crypto_instance *(*alloc)(struct rtattr **tb);
57 void (*free)(struct crypto_instance *inst);
58 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
59
60 char name[CRYPTO_MAX_ALG_NAME];
61};
62
63struct crypto_spawn {
64 struct list_head list;
65 struct crypto_alg *alg;
66 struct crypto_instance *inst;
67 const struct crypto_type *frontend;
68 u32 mask;
69};
70
71struct crypto_queue {
72 struct list_head list;
73 struct list_head *backlog;
74
75 unsigned int qlen;
76 unsigned int max_qlen;
77};
78
79struct scatter_walk {
80 struct scatterlist *sg;
81 unsigned int offset;
82};
83
84struct 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;
106 unsigned int ivsize;
107
108 int flags;
109 unsigned int walk_blocksize;
110 unsigned int cipher_blocksize;
111 unsigned int alignmask;
112};
113
114struct 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
131extern const struct crypto_type crypto_ablkcipher_type;
132extern const struct crypto_type crypto_blkcipher_type;
133
134void crypto_mod_put(struct crypto_alg *alg);
135
136int crypto_register_template(struct crypto_template *tmpl);
137void crypto_unregister_template(struct crypto_template *tmpl);
138struct crypto_template *crypto_lookup_template(const char *name);
139
140int crypto_register_instance(struct crypto_template *tmpl,
141 struct crypto_instance *inst);
142int crypto_unregister_instance(struct crypto_instance *inst);
143
144int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
145 struct crypto_instance *inst, u32 mask);
146int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
147 struct crypto_instance *inst,
148 const struct crypto_type *frontend);
149int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
150 u32 type, u32 mask);
151
152void crypto_drop_spawn(struct crypto_spawn *spawn);
153struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
154 u32 mask);
155void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
156
157static inline void crypto_set_spawn(struct crypto_spawn *spawn,
158 struct crypto_instance *inst)
159{
160 spawn->inst = inst;
161}
162
163struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
164int crypto_check_attr_type(struct rtattr **tb, u32 type);
165const char *crypto_attr_alg_name(struct rtattr *rta);
166struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
167 const struct crypto_type *frontend,
168 u32 type, u32 mask);
169
170static 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
176int crypto_attr_u32(struct rtattr *rta, u32 *num);
177int crypto_inst_setname(struct crypto_instance *inst, const char *name,
178 struct crypto_alg *alg);
179void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
180 unsigned int head);
181struct crypto_instance *crypto_alloc_instance(const char *name,
182 struct crypto_alg *alg);
183
184void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
185int crypto_enqueue_request(struct crypto_queue *queue,
186 struct crypto_async_request *request);
187struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
188int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
189static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
190{
191 return queue->qlen;
192}
193
194/* These functions require the input/output to be aligned as u32. */
195void crypto_inc(u8 *a, unsigned int size);
196void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
197
198int blkcipher_walk_done(struct blkcipher_desc *desc,
199 struct blkcipher_walk *walk, int err);
200int blkcipher_walk_virt(struct blkcipher_desc *desc,
201 struct blkcipher_walk *walk);
202int blkcipher_walk_phys(struct blkcipher_desc *desc,
203 struct blkcipher_walk *walk);
204int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
205 struct blkcipher_walk *walk,
206 unsigned int blocksize);
207int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
208 struct blkcipher_walk *walk,
209 struct crypto_aead *tfm,
210 unsigned int blocksize);
211
212int ablkcipher_walk_done(struct ablkcipher_request *req,
213 struct ablkcipher_walk *walk, int err);
214int ablkcipher_walk_phys(struct ablkcipher_request *req,
215 struct ablkcipher_walk *walk);
216void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
217
218static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
219{
220 return PTR_ALIGN(crypto_tfm_ctx(tfm),
221 crypto_tfm_alg_alignmask(tfm) + 1);
222}
223
224static 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
230static inline void *crypto_instance_ctx(struct crypto_instance *inst)
231{
232 return inst->__ctx;
233}
234
235static 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
241static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
242{
243 return crypto_tfm_ctx(&tfm->base);
244}
245
246static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
247{
248 return crypto_tfm_ctx_aligned(&tfm->base);
249}
250
251static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
252 struct crypto_spawn *spawn)
253{
254 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
255 u32 mask = CRYPTO_ALG_TYPE_MASK;
256
257 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
258}
259
260static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
261{
262 return crypto_tfm_ctx(&tfm->base);
263}
264
265static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
266{
267 return crypto_tfm_ctx_aligned(&tfm->base);
268}
269
270static 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
279static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
280{
281 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
282}
283
284static 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
294static 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
305static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
306{
307 if (unlikely(!list_empty(&walk->buffers)))
308 __ablkcipher_walk_complete(walk);
309}
310
311static 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
318static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
319 struct ablkcipher_request *request)
320{
321 return crypto_enqueue_request(queue, &request->base);
322}
323
324static inline struct ablkcipher_request *ablkcipher_dequeue_request(
325 struct crypto_queue *queue)
326{
327 return ablkcipher_request_cast(crypto_dequeue_request(queue));
328}
329
330static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
331{
332 return req->__ctx;
333}
334
335static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
336 struct crypto_ablkcipher *tfm)
337{
338 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
339}
340
341static 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
347static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
348{
349 return (type ^ off) & mask & off;
350}
351
352/*
353 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
354 * Otherwise returns zero.
355 */
356static inline int crypto_requires_sync(u32 type, u32 mask)
357{
358 return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
359}
360
361noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
362
363/**
364 * crypto_memneq - Compare two areas of memory without leaking
365 * timing information.
366 *
367 * @a: One area of memory
368 * @b: Another area of memory
369 * @size: The size of the area.
370 *
371 * Returns 0 when data is equal, 1 otherwise.
372 */
373static inline int crypto_memneq(const void *a, const void *b, size_t size)
374{
375 return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
376}
377
378static inline void crypto_yield(u32 flags)
379{
380#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
381 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
382 cond_resched();
383#endif
384}
385
386#endif /* _CRYPTO_ALGAPI_H */
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>
16#include <linux/list.h>
17#include <linux/kernel.h>
18#include <linux/skbuff.h>
19
20struct module;
21struct rtattr;
22struct seq_file;
23
24struct crypto_type {
25 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
26 unsigned int (*extsize)(struct crypto_alg *alg);
27 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
28 int (*init_tfm)(struct crypto_tfm *tfm);
29 void (*show)(struct seq_file *m, struct crypto_alg *alg);
30 int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
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;
37};
38
39struct 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
48struct crypto_template {
49 struct list_head list;
50 struct hlist_head instances;
51 struct module *module;
52
53 struct crypto_instance *(*alloc)(struct rtattr **tb);
54 void (*free)(struct crypto_instance *inst);
55 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
56
57 char name[CRYPTO_MAX_ALG_NAME];
58};
59
60struct crypto_spawn {
61 struct list_head list;
62 struct crypto_alg *alg;
63 struct crypto_instance *inst;
64 const struct crypto_type *frontend;
65 u32 mask;
66};
67
68struct crypto_queue {
69 struct list_head list;
70 struct list_head *backlog;
71
72 unsigned int qlen;
73 unsigned int max_qlen;
74};
75
76struct scatter_walk {
77 struct scatterlist *sg;
78 unsigned int offset;
79};
80
81struct 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 unsigned int ivsize;
104
105 int flags;
106 unsigned int walk_blocksize;
107 unsigned int cipher_blocksize;
108 unsigned int alignmask;
109};
110
111struct ablkcipher_walk {
112 struct {
113 struct page *page;
114 unsigned int offset;
115 } src, dst;
116
117 struct scatter_walk in;
118 unsigned int nbytes;
119 struct scatter_walk out;
120 unsigned int total;
121 struct list_head buffers;
122 u8 *iv_buffer;
123 u8 *iv;
124 int flags;
125 unsigned int blocksize;
126};
127
128extern const struct crypto_type crypto_ablkcipher_type;
129extern const struct crypto_type crypto_aead_type;
130extern const struct crypto_type crypto_blkcipher_type;
131
132void crypto_mod_put(struct crypto_alg *alg);
133
134int crypto_register_template(struct crypto_template *tmpl);
135void crypto_unregister_template(struct crypto_template *tmpl);
136struct crypto_template *crypto_lookup_template(const char *name);
137
138int crypto_register_instance(struct crypto_template *tmpl,
139 struct crypto_instance *inst);
140int crypto_unregister_instance(struct crypto_alg *alg);
141
142int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
143 struct crypto_instance *inst, u32 mask);
144int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
145 struct crypto_instance *inst,
146 const struct crypto_type *frontend);
147
148void crypto_drop_spawn(struct crypto_spawn *spawn);
149struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
150 u32 mask);
151void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
152
153static inline void crypto_set_spawn(struct crypto_spawn *spawn,
154 struct crypto_instance *inst)
155{
156 spawn->inst = inst;
157}
158
159struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
160int crypto_check_attr_type(struct rtattr **tb, u32 type);
161const char *crypto_attr_alg_name(struct rtattr *rta);
162struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
163 const struct crypto_type *frontend,
164 u32 type, u32 mask);
165
166static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
167 u32 type, u32 mask)
168{
169 return crypto_attr_alg2(rta, NULL, type, mask);
170}
171
172int crypto_attr_u32(struct rtattr *rta, u32 *num);
173void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
174 unsigned int head);
175struct crypto_instance *crypto_alloc_instance(const char *name,
176 struct crypto_alg *alg);
177
178void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
179int crypto_enqueue_request(struct crypto_queue *queue,
180 struct crypto_async_request *request);
181void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
182struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
183int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
184
185/* These functions require the input/output to be aligned as u32. */
186void crypto_inc(u8 *a, unsigned int size);
187void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
188
189int blkcipher_walk_done(struct blkcipher_desc *desc,
190 struct blkcipher_walk *walk, int err);
191int blkcipher_walk_virt(struct blkcipher_desc *desc,
192 struct blkcipher_walk *walk);
193int blkcipher_walk_phys(struct blkcipher_desc *desc,
194 struct blkcipher_walk *walk);
195int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
196 struct blkcipher_walk *walk,
197 unsigned int blocksize);
198int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
199 struct blkcipher_walk *walk,
200 struct crypto_aead *tfm,
201 unsigned int blocksize);
202
203int ablkcipher_walk_done(struct ablkcipher_request *req,
204 struct ablkcipher_walk *walk, int err);
205int ablkcipher_walk_phys(struct ablkcipher_request *req,
206 struct ablkcipher_walk *walk);
207void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
208
209static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
210{
211 return PTR_ALIGN(crypto_tfm_ctx(tfm),
212 crypto_tfm_alg_alignmask(tfm) + 1);
213}
214
215static inline struct crypto_instance *crypto_tfm_alg_instance(
216 struct crypto_tfm *tfm)
217{
218 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
219}
220
221static inline void *crypto_instance_ctx(struct crypto_instance *inst)
222{
223 return inst->__ctx;
224}
225
226static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
227 struct crypto_ablkcipher *tfm)
228{
229 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
230}
231
232static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
233{
234 return crypto_tfm_ctx(&tfm->base);
235}
236
237static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
238{
239 return crypto_tfm_ctx_aligned(&tfm->base);
240}
241
242static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
243{
244 return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
245}
246
247static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
248{
249 return crypto_tfm_ctx(&tfm->base);
250}
251
252static inline struct crypto_instance *crypto_aead_alg_instance(
253 struct crypto_aead *aead)
254{
255 return crypto_tfm_alg_instance(&aead->base);
256}
257
258static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
259 struct crypto_spawn *spawn)
260{
261 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
262 u32 mask = CRYPTO_ALG_TYPE_MASK;
263
264 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
265}
266
267static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
268{
269 return crypto_tfm_ctx(&tfm->base);
270}
271
272static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
273{
274 return crypto_tfm_ctx_aligned(&tfm->base);
275}
276
277static inline struct crypto_cipher *crypto_spawn_cipher(
278 struct crypto_spawn *spawn)
279{
280 u32 type = CRYPTO_ALG_TYPE_CIPHER;
281 u32 mask = CRYPTO_ALG_TYPE_MASK;
282
283 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
284}
285
286static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
287{
288 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
289}
290
291static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
292{
293 u32 type = CRYPTO_ALG_TYPE_HASH;
294 u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
295
296 return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
297}
298
299static inline void *crypto_hash_ctx(struct crypto_hash *tfm)
300{
301 return crypto_tfm_ctx(&tfm->base);
302}
303
304static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
305{
306 return crypto_tfm_ctx_aligned(&tfm->base);
307}
308
309static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
310 struct scatterlist *dst,
311 struct scatterlist *src,
312 unsigned int nbytes)
313{
314 walk->in.sg = src;
315 walk->out.sg = dst;
316 walk->total = nbytes;
317}
318
319static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
320 struct scatterlist *dst,
321 struct scatterlist *src,
322 unsigned int nbytes)
323{
324 walk->in.sg = src;
325 walk->out.sg = dst;
326 walk->total = nbytes;
327 INIT_LIST_HEAD(&walk->buffers);
328}
329
330static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
331{
332 if (unlikely(!list_empty(&walk->buffers)))
333 __ablkcipher_walk_complete(walk);
334}
335
336static inline struct crypto_async_request *crypto_get_backlog(
337 struct crypto_queue *queue)
338{
339 return queue->backlog == &queue->list ? NULL :
340 container_of(queue->backlog, struct crypto_async_request, list);
341}
342
343static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
344 struct ablkcipher_request *request)
345{
346 return crypto_enqueue_request(queue, &request->base);
347}
348
349static inline struct ablkcipher_request *ablkcipher_dequeue_request(
350 struct crypto_queue *queue)
351{
352 return ablkcipher_request_cast(crypto_dequeue_request(queue));
353}
354
355static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
356{
357 return req->__ctx;
358}
359
360static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
361 struct crypto_ablkcipher *tfm)
362{
363 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
364}
365
366static inline void *aead_request_ctx(struct aead_request *req)
367{
368 return req->__ctx;
369}
370
371static inline void aead_request_complete(struct aead_request *req, int err)
372{
373 req->base.complete(&req->base, err);
374}
375
376static inline u32 aead_request_flags(struct aead_request *req)
377{
378 return req->base.flags;
379}
380
381static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
382 u32 type, u32 mask)
383{
384 return crypto_attr_alg(tb[1], type, mask);
385}
386
387/*
388 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
389 * Otherwise returns zero.
390 */
391static inline int crypto_requires_sync(u32 type, u32 mask)
392{
393 return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
394}
395
396noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
397
398/**
399 * crypto_memneq - Compare two areas of memory without leaking
400 * timing information.
401 *
402 * @a: One area of memory
403 * @b: Another area of memory
404 * @size: The size of the area.
405 *
406 * Returns 0 when data is equal, 1 otherwise.
407 */
408static inline int crypto_memneq(const void *a, const void *b, size_t size)
409{
410 return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
411}
412
413#endif /* _CRYPTO_ALGAPI_H */