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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/kthread.h>
19#include <linux/skbuff.h>
20
21struct crypto_aead;
22struct crypto_instance;
23struct module;
24struct rtattr;
25struct seq_file;
26
27struct crypto_type {
28 unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
29 unsigned int (*extsize)(struct crypto_alg *alg);
30 int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
31 int (*init_tfm)(struct crypto_tfm *tfm);
32 void (*show)(struct seq_file *m, struct crypto_alg *alg);
33 int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
34 struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
35 void (*free)(struct crypto_instance *inst);
36
37 unsigned int type;
38 unsigned int maskclear;
39 unsigned int maskset;
40 unsigned int tfmsize;
41};
42
43struct crypto_instance {
44 struct crypto_alg alg;
45
46 struct crypto_template *tmpl;
47 struct hlist_node list;
48
49 void *__ctx[] CRYPTO_MINALIGN_ATTR;
50};
51
52struct crypto_template {
53 struct list_head list;
54 struct hlist_head instances;
55 struct module *module;
56
57 struct crypto_instance *(*alloc)(struct rtattr **tb);
58 void (*free)(struct crypto_instance *inst);
59 int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
60
61 char name[CRYPTO_MAX_ALG_NAME];
62};
63
64struct crypto_spawn {
65 struct list_head list;
66 struct crypto_alg *alg;
67 struct crypto_instance *inst;
68 const struct crypto_type *frontend;
69 u32 mask;
70};
71
72struct crypto_queue {
73 struct list_head list;
74 struct list_head *backlog;
75
76 unsigned int qlen;
77 unsigned int max_qlen;
78};
79
80struct scatter_walk {
81 struct scatterlist *sg;
82 unsigned int offset;
83};
84
85struct blkcipher_walk {
86 union {
87 struct {
88 struct page *page;
89 unsigned long offset;
90 } phys;
91
92 struct {
93 u8 *page;
94 u8 *addr;
95 } virt;
96 } src, dst;
97
98 struct scatter_walk in;
99 unsigned int nbytes;
100
101 struct scatter_walk out;
102 unsigned int total;
103
104 void *page;
105 u8 *buffer;
106 u8 *iv;
107 unsigned int ivsize;
108
109 int flags;
110 unsigned int walk_blocksize;
111 unsigned int cipher_blocksize;
112 unsigned int alignmask;
113};
114
115struct ablkcipher_walk {
116 struct {
117 struct page *page;
118 unsigned int offset;
119 } src, dst;
120
121 struct scatter_walk in;
122 unsigned int nbytes;
123 struct scatter_walk out;
124 unsigned int total;
125 struct list_head buffers;
126 u8 *iv_buffer;
127 u8 *iv;
128 int flags;
129 unsigned int blocksize;
130};
131
132#define ENGINE_NAME_LEN 30
133/*
134 * struct crypto_engine - crypto hardware engine
135 * @name: the engine name
136 * @idling: the engine is entering idle state
137 * @busy: request pump is busy
138 * @running: the engine is on working
139 * @cur_req_prepared: current request is prepared
140 * @list: link with the global crypto engine list
141 * @queue_lock: spinlock to syncronise access to request queue
142 * @queue: the crypto queue of the engine
143 * @rt: whether this queue is set to run as a realtime task
144 * @prepare_crypt_hardware: a request will soon arrive from the queue
145 * so the subsystem requests the driver to prepare the hardware
146 * by issuing this call
147 * @unprepare_crypt_hardware: there are currently no more requests on the
148 * queue so the subsystem notifies the driver that it may relax the
149 * hardware by issuing this call
150 * @prepare_request: do some prepare if need before handle the current request
151 * @unprepare_request: undo any work done by prepare_message()
152 * @crypt_one_request: do encryption for current request
153 * @kworker: thread struct for request pump
154 * @kworker_task: pointer to task for request pump kworker thread
155 * @pump_requests: work struct for scheduling work to the request pump
156 * @priv_data: the engine private data
157 * @cur_req: the current request which is on processing
158 */
159struct crypto_engine {
160 char name[ENGINE_NAME_LEN];
161 bool idling;
162 bool busy;
163 bool running;
164 bool cur_req_prepared;
165
166 struct list_head list;
167 spinlock_t queue_lock;
168 struct crypto_queue queue;
169
170 bool rt;
171
172 int (*prepare_crypt_hardware)(struct crypto_engine *engine);
173 int (*unprepare_crypt_hardware)(struct crypto_engine *engine);
174
175 int (*prepare_request)(struct crypto_engine *engine,
176 struct ablkcipher_request *req);
177 int (*unprepare_request)(struct crypto_engine *engine,
178 struct ablkcipher_request *req);
179 int (*crypt_one_request)(struct crypto_engine *engine,
180 struct ablkcipher_request *req);
181
182 struct kthread_worker kworker;
183 struct task_struct *kworker_task;
184 struct kthread_work pump_requests;
185
186 void *priv_data;
187 struct ablkcipher_request *cur_req;
188};
189
190int crypto_transfer_request(struct crypto_engine *engine,
191 struct ablkcipher_request *req, bool need_pump);
192int crypto_transfer_request_to_engine(struct crypto_engine *engine,
193 struct ablkcipher_request *req);
194void crypto_finalize_request(struct crypto_engine *engine,
195 struct ablkcipher_request *req, int err);
196int crypto_engine_start(struct crypto_engine *engine);
197int crypto_engine_stop(struct crypto_engine *engine);
198struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
199int crypto_engine_exit(struct crypto_engine *engine);
200
201extern const struct crypto_type crypto_ablkcipher_type;
202extern const struct crypto_type crypto_blkcipher_type;
203
204void crypto_mod_put(struct crypto_alg *alg);
205
206int crypto_register_template(struct crypto_template *tmpl);
207void crypto_unregister_template(struct crypto_template *tmpl);
208struct crypto_template *crypto_lookup_template(const char *name);
209
210int crypto_register_instance(struct crypto_template *tmpl,
211 struct crypto_instance *inst);
212int crypto_unregister_instance(struct crypto_instance *inst);
213
214int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
215 struct crypto_instance *inst, u32 mask);
216int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
217 struct crypto_instance *inst,
218 const struct crypto_type *frontend);
219int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
220 u32 type, u32 mask);
221
222void crypto_drop_spawn(struct crypto_spawn *spawn);
223struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
224 u32 mask);
225void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
226
227static inline void crypto_set_spawn(struct crypto_spawn *spawn,
228 struct crypto_instance *inst)
229{
230 spawn->inst = inst;
231}
232
233struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
234int crypto_check_attr_type(struct rtattr **tb, u32 type);
235const char *crypto_attr_alg_name(struct rtattr *rta);
236struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
237 const struct crypto_type *frontend,
238 u32 type, u32 mask);
239
240static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
241 u32 type, u32 mask)
242{
243 return crypto_attr_alg2(rta, NULL, type, mask);
244}
245
246int crypto_attr_u32(struct rtattr *rta, u32 *num);
247void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
248 unsigned int head);
249struct crypto_instance *crypto_alloc_instance(const char *name,
250 struct crypto_alg *alg);
251
252void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
253int crypto_enqueue_request(struct crypto_queue *queue,
254 struct crypto_async_request *request);
255struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
256int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
257static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
258{
259 return queue->qlen;
260}
261
262/* These functions require the input/output to be aligned as u32. */
263void crypto_inc(u8 *a, unsigned int size);
264void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
265
266int blkcipher_walk_done(struct blkcipher_desc *desc,
267 struct blkcipher_walk *walk, int err);
268int blkcipher_walk_virt(struct blkcipher_desc *desc,
269 struct blkcipher_walk *walk);
270int blkcipher_walk_phys(struct blkcipher_desc *desc,
271 struct blkcipher_walk *walk);
272int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
273 struct blkcipher_walk *walk,
274 unsigned int blocksize);
275int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
276 struct blkcipher_walk *walk,
277 struct crypto_aead *tfm,
278 unsigned int blocksize);
279
280int ablkcipher_walk_done(struct ablkcipher_request *req,
281 struct ablkcipher_walk *walk, int err);
282int ablkcipher_walk_phys(struct ablkcipher_request *req,
283 struct ablkcipher_walk *walk);
284void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
285
286static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
287{
288 return PTR_ALIGN(crypto_tfm_ctx(tfm),
289 crypto_tfm_alg_alignmask(tfm) + 1);
290}
291
292static inline struct crypto_instance *crypto_tfm_alg_instance(
293 struct crypto_tfm *tfm)
294{
295 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
296}
297
298static inline void *crypto_instance_ctx(struct crypto_instance *inst)
299{
300 return inst->__ctx;
301}
302
303static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
304 struct crypto_ablkcipher *tfm)
305{
306 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
307}
308
309static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
310{
311 return crypto_tfm_ctx(&tfm->base);
312}
313
314static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
315{
316 return crypto_tfm_ctx_aligned(&tfm->base);
317}
318
319static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
320 struct crypto_spawn *spawn)
321{
322 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
323 u32 mask = CRYPTO_ALG_TYPE_MASK;
324
325 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
326}
327
328static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
329{
330 return crypto_tfm_ctx(&tfm->base);
331}
332
333static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
334{
335 return crypto_tfm_ctx_aligned(&tfm->base);
336}
337
338static inline struct crypto_cipher *crypto_spawn_cipher(
339 struct crypto_spawn *spawn)
340{
341 u32 type = CRYPTO_ALG_TYPE_CIPHER;
342 u32 mask = CRYPTO_ALG_TYPE_MASK;
343
344 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
345}
346
347static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
348{
349 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
350}
351
352static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
353 struct scatterlist *dst,
354 struct scatterlist *src,
355 unsigned int nbytes)
356{
357 walk->in.sg = src;
358 walk->out.sg = dst;
359 walk->total = nbytes;
360}
361
362static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
363 struct scatterlist *dst,
364 struct scatterlist *src,
365 unsigned int nbytes)
366{
367 walk->in.sg = src;
368 walk->out.sg = dst;
369 walk->total = nbytes;
370 INIT_LIST_HEAD(&walk->buffers);
371}
372
373static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
374{
375 if (unlikely(!list_empty(&walk->buffers)))
376 __ablkcipher_walk_complete(walk);
377}
378
379static inline struct crypto_async_request *crypto_get_backlog(
380 struct crypto_queue *queue)
381{
382 return queue->backlog == &queue->list ? NULL :
383 container_of(queue->backlog, struct crypto_async_request, list);
384}
385
386static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
387 struct ablkcipher_request *request)
388{
389 return crypto_enqueue_request(queue, &request->base);
390}
391
392static inline struct ablkcipher_request *ablkcipher_dequeue_request(
393 struct crypto_queue *queue)
394{
395 return ablkcipher_request_cast(crypto_dequeue_request(queue));
396}
397
398static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
399{
400 return req->__ctx;
401}
402
403static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
404 struct crypto_ablkcipher *tfm)
405{
406 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
407}
408
409static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
410 u32 type, u32 mask)
411{
412 return crypto_attr_alg(tb[1], type, mask);
413}
414
415/*
416 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
417 * Otherwise returns zero.
418 */
419static inline int crypto_requires_sync(u32 type, u32 mask)
420{
421 return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
422}
423
424noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
425
426/**
427 * crypto_memneq - Compare two areas of memory without leaking
428 * timing information.
429 *
430 * @a: One area of memory
431 * @b: Another area of memory
432 * @size: The size of the area.
433 *
434 * Returns 0 when data is equal, 1 otherwise.
435 */
436static inline int crypto_memneq(const void *a, const void *b, size_t size)
437{
438 return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
439}
440
441static inline void crypto_yield(u32 flags)
442{
443 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
444 cond_resched();
445}
446
447#endif /* _CRYPTO_ALGAPI_H */