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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
19struct module;
20struct rtattr;
21struct seq_file;
22
23struct crypto_type {
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);
30
31 unsigned int type;
32 unsigned int maskclear;
33 unsigned int maskset;
34 unsigned int tfmsize;
35};
36
37struct 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
46struct crypto_template {
47 struct list_head list;
48 struct hlist_head instances;
49 struct module *module;
50
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);
54
55 char name[CRYPTO_MAX_ALG_NAME];
56};
57
58struct crypto_spawn {
59 struct list_head list;
60 struct crypto_alg *alg;
61 struct crypto_instance *inst;
62 const struct crypto_type *frontend;
63 u32 mask;
64};
65
66struct crypto_queue {
67 struct list_head list;
68 struct list_head *backlog;
69
70 unsigned int qlen;
71 unsigned int max_qlen;
72};
73
74struct scatter_walk {
75 struct scatterlist *sg;
76 unsigned int offset;
77};
78
79struct 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;
103 unsigned int blocksize;
104};
105
106struct ablkcipher_walk {
107 struct {
108 struct page *page;
109 unsigned int offset;
110 } src, dst;
111
112 struct scatter_walk in;
113 unsigned int nbytes;
114 struct scatter_walk out;
115 unsigned int total;
116 struct list_head buffers;
117 u8 *iv_buffer;
118 u8 *iv;
119 int flags;
120 unsigned int blocksize;
121};
122
123extern const struct crypto_type crypto_ablkcipher_type;
124extern const struct crypto_type crypto_aead_type;
125extern const struct crypto_type crypto_blkcipher_type;
126
127void crypto_mod_put(struct crypto_alg *alg);
128
129int crypto_register_template(struct crypto_template *tmpl);
130void crypto_unregister_template(struct crypto_template *tmpl);
131struct crypto_template *crypto_lookup_template(const char *name);
132
133int crypto_register_instance(struct crypto_template *tmpl,
134 struct crypto_instance *inst);
135
136int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
137 struct crypto_instance *inst, u32 mask);
138int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
139 struct crypto_instance *inst,
140 const struct crypto_type *frontend);
141
142void crypto_drop_spawn(struct crypto_spawn *spawn);
143struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
144 u32 mask);
145void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
146
147static inline void crypto_set_spawn(struct crypto_spawn *spawn,
148 struct crypto_instance *inst)
149{
150 spawn->inst = inst;
151}
152
153struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
154int crypto_check_attr_type(struct rtattr **tb, u32 type);
155const char *crypto_attr_alg_name(struct rtattr *rta);
156struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
157 const struct crypto_type *frontend,
158 u32 type, u32 mask);
159
160static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
161 u32 type, u32 mask)
162{
163 return crypto_attr_alg2(rta, NULL, type, mask);
164}
165
166int crypto_attr_u32(struct rtattr *rta, u32 *num);
167void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
168 unsigned int head);
169struct crypto_instance *crypto_alloc_instance(const char *name,
170 struct crypto_alg *alg);
171
172void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
173int crypto_enqueue_request(struct crypto_queue *queue,
174 struct crypto_async_request *request);
175void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
176struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
177int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
178
179/* These functions require the input/output to be aligned as u32. */
180void crypto_inc(u8 *a, unsigned int size);
181void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
182
183int blkcipher_walk_done(struct blkcipher_desc *desc,
184 struct blkcipher_walk *walk, int err);
185int blkcipher_walk_virt(struct blkcipher_desc *desc,
186 struct blkcipher_walk *walk);
187int blkcipher_walk_phys(struct blkcipher_desc *desc,
188 struct blkcipher_walk *walk);
189int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
190 struct blkcipher_walk *walk,
191 unsigned int blocksize);
192
193int ablkcipher_walk_done(struct ablkcipher_request *req,
194 struct ablkcipher_walk *walk, int err);
195int ablkcipher_walk_phys(struct ablkcipher_request *req,
196 struct ablkcipher_walk *walk);
197void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
198
199static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
200{
201 return PTR_ALIGN(crypto_tfm_ctx(tfm),
202 crypto_tfm_alg_alignmask(tfm) + 1);
203}
204
205static inline struct crypto_instance *crypto_tfm_alg_instance(
206 struct crypto_tfm *tfm)
207{
208 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
209}
210
211static inline void *crypto_instance_ctx(struct crypto_instance *inst)
212{
213 return inst->__ctx;
214}
215
216static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
217 struct crypto_ablkcipher *tfm)
218{
219 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
220}
221
222static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
223{
224 return crypto_tfm_ctx(&tfm->base);
225}
226
227static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
228{
229 return crypto_tfm_ctx_aligned(&tfm->base);
230}
231
232static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
233{
234 return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
235}
236
237static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
238{
239 return crypto_tfm_ctx(&tfm->base);
240}
241
242static inline struct crypto_instance *crypto_aead_alg_instance(
243 struct crypto_aead *aead)
244{
245 return crypto_tfm_alg_instance(&aead->base);
246}
247
248static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
249 struct crypto_spawn *spawn)
250{
251 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
252 u32 mask = CRYPTO_ALG_TYPE_MASK;
253
254 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
255}
256
257static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
258{
259 return crypto_tfm_ctx(&tfm->base);
260}
261
262static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
263{
264 return crypto_tfm_ctx_aligned(&tfm->base);
265}
266
267static inline struct crypto_cipher *crypto_spawn_cipher(
268 struct crypto_spawn *spawn)
269{
270 u32 type = CRYPTO_ALG_TYPE_CIPHER;
271 u32 mask = CRYPTO_ALG_TYPE_MASK;
272
273 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
274}
275
276static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
277{
278 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
279}
280
281static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
282{
283 u32 type = CRYPTO_ALG_TYPE_HASH;
284 u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
285
286 return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
287}
288
289static inline void *crypto_hash_ctx(struct crypto_hash *tfm)
290{
291 return crypto_tfm_ctx(&tfm->base);
292}
293
294static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
295{
296 return crypto_tfm_ctx_aligned(&tfm->base);
297}
298
299static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
300 struct scatterlist *dst,
301 struct scatterlist *src,
302 unsigned int nbytes)
303{
304 walk->in.sg = src;
305 walk->out.sg = dst;
306 walk->total = nbytes;
307}
308
309static inline void ablkcipher_walk_init(struct ablkcipher_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 INIT_LIST_HEAD(&walk->buffers);
318}
319
320static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
321{
322 if (unlikely(!list_empty(&walk->buffers)))
323 __ablkcipher_walk_complete(walk);
324}
325
326static inline struct crypto_async_request *crypto_get_backlog(
327 struct crypto_queue *queue)
328{
329 return queue->backlog == &queue->list ? NULL :
330 container_of(queue->backlog, struct crypto_async_request, list);
331}
332
333static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
334 struct ablkcipher_request *request)
335{
336 return crypto_enqueue_request(queue, &request->base);
337}
338
339static inline struct ablkcipher_request *ablkcipher_dequeue_request(
340 struct crypto_queue *queue)
341{
342 return ablkcipher_request_cast(crypto_dequeue_request(queue));
343}
344
345static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
346{
347 return req->__ctx;
348}
349
350static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
351 struct crypto_ablkcipher *tfm)
352{
353 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
354}
355
356static inline void *aead_request_ctx(struct aead_request *req)
357{
358 return req->__ctx;
359}
360
361static inline void aead_request_complete(struct aead_request *req, int err)
362{
363 req->base.complete(&req->base, err);
364}
365
366static inline u32 aead_request_flags(struct aead_request *req)
367{
368 return req->base.flags;
369}
370
371static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
372 u32 type, u32 mask)
373{
374 return crypto_attr_alg(tb[1], type, mask);
375}
376
377/*
378 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
379 * Otherwise returns zero.
380 */
381static inline int crypto_requires_sync(u32 type, u32 mask)
382{
383 return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
384}
385
386#endif /* _CRYPTO_ALGAPI_H */
387
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 void (*free)(struct crypto_instance *inst);
34
35 unsigned int type;
36 unsigned int maskclear;
37 unsigned int maskset;
38 unsigned int tfmsize;
39};
40
41struct crypto_instance {
42 struct crypto_alg alg;
43
44 struct crypto_template *tmpl;
45 struct hlist_node list;
46
47 void *__ctx[] CRYPTO_MINALIGN_ATTR;
48};
49
50struct crypto_template {
51 struct list_head list;
52 struct hlist_head instances;
53 struct module *module;
54
55 struct crypto_instance *(*alloc)(struct rtattr **tb);
56 void (*free)(struct crypto_instance *inst);
57 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
58
59 char name[CRYPTO_MAX_ALG_NAME];
60};
61
62struct crypto_spawn {
63 struct list_head list;
64 struct crypto_alg *alg;
65 struct crypto_instance *inst;
66 const struct crypto_type *frontend;
67 u32 mask;
68};
69
70struct crypto_queue {
71 struct list_head list;
72 struct list_head *backlog;
73
74 unsigned int qlen;
75 unsigned int max_qlen;
76};
77
78struct scatter_walk {
79 struct scatterlist *sg;
80 unsigned int offset;
81};
82
83struct blkcipher_walk {
84 union {
85 struct {
86 struct page *page;
87 unsigned long offset;
88 } phys;
89
90 struct {
91 u8 *page;
92 u8 *addr;
93 } virt;
94 } src, dst;
95
96 struct scatter_walk in;
97 unsigned int nbytes;
98
99 struct scatter_walk out;
100 unsigned int total;
101
102 void *page;
103 u8 *buffer;
104 u8 *iv;
105 unsigned int ivsize;
106
107 int flags;
108 unsigned int walk_blocksize;
109 unsigned int cipher_blocksize;
110 unsigned int alignmask;
111};
112
113struct ablkcipher_walk {
114 struct {
115 struct page *page;
116 unsigned int offset;
117 } src, dst;
118
119 struct scatter_walk in;
120 unsigned int nbytes;
121 struct scatter_walk out;
122 unsigned int total;
123 struct list_head buffers;
124 u8 *iv_buffer;
125 u8 *iv;
126 int flags;
127 unsigned int blocksize;
128};
129
130extern const struct crypto_type crypto_ablkcipher_type;
131extern const struct crypto_type crypto_blkcipher_type;
132
133void crypto_mod_put(struct crypto_alg *alg);
134
135int crypto_register_template(struct crypto_template *tmpl);
136void crypto_unregister_template(struct crypto_template *tmpl);
137struct crypto_template *crypto_lookup_template(const char *name);
138
139int crypto_register_instance(struct crypto_template *tmpl,
140 struct crypto_instance *inst);
141int crypto_unregister_instance(struct crypto_instance *inst);
142
143int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
144 struct crypto_instance *inst, u32 mask);
145int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
146 struct crypto_instance *inst,
147 const struct crypto_type *frontend);
148int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
149 u32 type, u32 mask);
150
151void crypto_drop_spawn(struct crypto_spawn *spawn);
152struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
153 u32 mask);
154void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
155
156static inline void crypto_set_spawn(struct crypto_spawn *spawn,
157 struct crypto_instance *inst)
158{
159 spawn->inst = inst;
160}
161
162struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
163int crypto_check_attr_type(struct rtattr **tb, u32 type);
164const char *crypto_attr_alg_name(struct rtattr *rta);
165struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
166 const struct crypto_type *frontend,
167 u32 type, u32 mask);
168
169static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
170 u32 type, u32 mask)
171{
172 return crypto_attr_alg2(rta, NULL, type, mask);
173}
174
175int crypto_attr_u32(struct rtattr *rta, u32 *num);
176int crypto_inst_setname(struct crypto_instance *inst, const char *name,
177 struct crypto_alg *alg);
178void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
179 unsigned int head);
180struct crypto_instance *crypto_alloc_instance(const char *name,
181 struct crypto_alg *alg);
182
183void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
184int crypto_enqueue_request(struct crypto_queue *queue,
185 struct crypto_async_request *request);
186struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
187int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
188static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
189{
190 return queue->qlen;
191}
192
193void crypto_inc(u8 *a, unsigned int size);
194void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);
195
196static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
197{
198 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
199 __builtin_constant_p(size) &&
200 (size % sizeof(unsigned long)) == 0) {
201 unsigned long *d = (unsigned long *)dst;
202 unsigned long *s = (unsigned long *)src;
203
204 while (size > 0) {
205 *d++ ^= *s++;
206 size -= sizeof(unsigned long);
207 }
208 } else {
209 __crypto_xor(dst, dst, src, size);
210 }
211}
212
213static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
214 unsigned int size)
215{
216 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
217 __builtin_constant_p(size) &&
218 (size % sizeof(unsigned long)) == 0) {
219 unsigned long *d = (unsigned long *)dst;
220 unsigned long *s1 = (unsigned long *)src1;
221 unsigned long *s2 = (unsigned long *)src2;
222
223 while (size > 0) {
224 *d++ = *s1++ ^ *s2++;
225 size -= sizeof(unsigned long);
226 }
227 } else {
228 __crypto_xor(dst, src1, src2, size);
229 }
230}
231
232int blkcipher_walk_done(struct blkcipher_desc *desc,
233 struct blkcipher_walk *walk, int err);
234int blkcipher_walk_virt(struct blkcipher_desc *desc,
235 struct blkcipher_walk *walk);
236int blkcipher_walk_phys(struct blkcipher_desc *desc,
237 struct blkcipher_walk *walk);
238int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
239 struct blkcipher_walk *walk,
240 unsigned int blocksize);
241int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
242 struct blkcipher_walk *walk,
243 struct crypto_aead *tfm,
244 unsigned int blocksize);
245
246int ablkcipher_walk_done(struct ablkcipher_request *req,
247 struct ablkcipher_walk *walk, int err);
248int ablkcipher_walk_phys(struct ablkcipher_request *req,
249 struct ablkcipher_walk *walk);
250void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
251
252static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
253{
254 return PTR_ALIGN(crypto_tfm_ctx(tfm),
255 crypto_tfm_alg_alignmask(tfm) + 1);
256}
257
258static inline struct crypto_instance *crypto_tfm_alg_instance(
259 struct crypto_tfm *tfm)
260{
261 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
262}
263
264static inline void *crypto_instance_ctx(struct crypto_instance *inst)
265{
266 return inst->__ctx;
267}
268
269static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
270 struct crypto_ablkcipher *tfm)
271{
272 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
273}
274
275static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
276{
277 return crypto_tfm_ctx(&tfm->base);
278}
279
280static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
281{
282 return crypto_tfm_ctx_aligned(&tfm->base);
283}
284
285static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
286 struct crypto_spawn *spawn)
287{
288 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
289 u32 mask = CRYPTO_ALG_TYPE_MASK;
290
291 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
292}
293
294static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
295{
296 return crypto_tfm_ctx(&tfm->base);
297}
298
299static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
300{
301 return crypto_tfm_ctx_aligned(&tfm->base);
302}
303
304static inline struct crypto_cipher *crypto_spawn_cipher(
305 struct crypto_spawn *spawn)
306{
307 u32 type = CRYPTO_ALG_TYPE_CIPHER;
308 u32 mask = CRYPTO_ALG_TYPE_MASK;
309
310 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
311}
312
313static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
314{
315 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
316}
317
318static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
319 struct scatterlist *dst,
320 struct scatterlist *src,
321 unsigned int nbytes)
322{
323 walk->in.sg = src;
324 walk->out.sg = dst;
325 walk->total = nbytes;
326}
327
328static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
329 struct scatterlist *dst,
330 struct scatterlist *src,
331 unsigned int nbytes)
332{
333 walk->in.sg = src;
334 walk->out.sg = dst;
335 walk->total = nbytes;
336 INIT_LIST_HEAD(&walk->buffers);
337}
338
339static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
340{
341 if (unlikely(!list_empty(&walk->buffers)))
342 __ablkcipher_walk_complete(walk);
343}
344
345static inline struct crypto_async_request *crypto_get_backlog(
346 struct crypto_queue *queue)
347{
348 return queue->backlog == &queue->list ? NULL :
349 container_of(queue->backlog, struct crypto_async_request, list);
350}
351
352static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
353 struct ablkcipher_request *request)
354{
355 return crypto_enqueue_request(queue, &request->base);
356}
357
358static inline struct ablkcipher_request *ablkcipher_dequeue_request(
359 struct crypto_queue *queue)
360{
361 return ablkcipher_request_cast(crypto_dequeue_request(queue));
362}
363
364static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
365{
366 return req->__ctx;
367}
368
369static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
370 struct crypto_ablkcipher *tfm)
371{
372 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
373}
374
375static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
376 u32 type, u32 mask)
377{
378 return crypto_attr_alg(tb[1], type, mask);
379}
380
381static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
382{
383 return (type ^ off) & mask & off;
384}
385
386/*
387 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
388 * Otherwise returns zero.
389 */
390static inline int crypto_requires_sync(u32 type, u32 mask)
391{
392 return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
393}
394
395noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
396
397/**
398 * crypto_memneq - Compare two areas of memory without leaking
399 * timing information.
400 *
401 * @a: One area of memory
402 * @b: Another area of memory
403 * @size: The size of the area.
404 *
405 * Returns 0 when data is equal, 1 otherwise.
406 */
407static inline int crypto_memneq(const void *a, const void *b, size_t size)
408{
409 return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
410}
411
412static inline void crypto_yield(u32 flags)
413{
414#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
415 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
416 cond_resched();
417#endif
418}
419
420#endif /* _CRYPTO_ALGAPI_H */