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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
194void crypto_inc(u8 *a, unsigned int size);
195void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size);
196
197static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
198{
199 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
200 __builtin_constant_p(size) &&
201 (size % sizeof(unsigned long)) == 0) {
202 unsigned long *d = (unsigned long *)dst;
203 unsigned long *s = (unsigned long *)src;
204
205 while (size > 0) {
206 *d++ ^= *s++;
207 size -= sizeof(unsigned long);
208 }
209 } else {
210 __crypto_xor(dst, dst, src, size);
211 }
212}
213
214static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
215 unsigned int size)
216{
217 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
218 __builtin_constant_p(size) &&
219 (size % sizeof(unsigned long)) == 0) {
220 unsigned long *d = (unsigned long *)dst;
221 unsigned long *s1 = (unsigned long *)src1;
222 unsigned long *s2 = (unsigned long *)src2;
223
224 while (size > 0) {
225 *d++ = *s1++ ^ *s2++;
226 size -= sizeof(unsigned long);
227 }
228 } else {
229 __crypto_xor(dst, src1, src2, size);
230 }
231}
232
233int blkcipher_walk_done(struct blkcipher_desc *desc,
234 struct blkcipher_walk *walk, int err);
235int blkcipher_walk_virt(struct blkcipher_desc *desc,
236 struct blkcipher_walk *walk);
237int blkcipher_walk_phys(struct blkcipher_desc *desc,
238 struct blkcipher_walk *walk);
239int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
240 struct blkcipher_walk *walk,
241 unsigned int blocksize);
242int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
243 struct blkcipher_walk *walk,
244 struct crypto_aead *tfm,
245 unsigned int blocksize);
246
247int ablkcipher_walk_done(struct ablkcipher_request *req,
248 struct ablkcipher_walk *walk, int err);
249int ablkcipher_walk_phys(struct ablkcipher_request *req,
250 struct ablkcipher_walk *walk);
251void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
252
253static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
254{
255 return PTR_ALIGN(crypto_tfm_ctx(tfm),
256 crypto_tfm_alg_alignmask(tfm) + 1);
257}
258
259static inline struct crypto_instance *crypto_tfm_alg_instance(
260 struct crypto_tfm *tfm)
261{
262 return container_of(tfm->__crt_alg, struct crypto_instance, alg);
263}
264
265static inline void *crypto_instance_ctx(struct crypto_instance *inst)
266{
267 return inst->__ctx;
268}
269
270static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
271 struct crypto_ablkcipher *tfm)
272{
273 return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
274}
275
276static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
277{
278 return crypto_tfm_ctx(&tfm->base);
279}
280
281static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
282{
283 return crypto_tfm_ctx_aligned(&tfm->base);
284}
285
286static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
287 struct crypto_spawn *spawn)
288{
289 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
290 u32 mask = CRYPTO_ALG_TYPE_MASK;
291
292 return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
293}
294
295static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
296{
297 return crypto_tfm_ctx(&tfm->base);
298}
299
300static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
301{
302 return crypto_tfm_ctx_aligned(&tfm->base);
303}
304
305static inline struct crypto_cipher *crypto_spawn_cipher(
306 struct crypto_spawn *spawn)
307{
308 u32 type = CRYPTO_ALG_TYPE_CIPHER;
309 u32 mask = CRYPTO_ALG_TYPE_MASK;
310
311 return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
312}
313
314static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
315{
316 return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
317}
318
319static inline void blkcipher_walk_init(struct blkcipher_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}
328
329static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
330 struct scatterlist *dst,
331 struct scatterlist *src,
332 unsigned int nbytes)
333{
334 walk->in.sg = src;
335 walk->out.sg = dst;
336 walk->total = nbytes;
337 INIT_LIST_HEAD(&walk->buffers);
338}
339
340static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
341{
342 if (unlikely(!list_empty(&walk->buffers)))
343 __ablkcipher_walk_complete(walk);
344}
345
346static inline struct crypto_async_request *crypto_get_backlog(
347 struct crypto_queue *queue)
348{
349 return queue->backlog == &queue->list ? NULL :
350 container_of(queue->backlog, struct crypto_async_request, list);
351}
352
353static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
354 struct ablkcipher_request *request)
355{
356 return crypto_enqueue_request(queue, &request->base);
357}
358
359static inline struct ablkcipher_request *ablkcipher_dequeue_request(
360 struct crypto_queue *queue)
361{
362 return ablkcipher_request_cast(crypto_dequeue_request(queue));
363}
364
365static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
366{
367 return req->__ctx;
368}
369
370static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
371 struct crypto_ablkcipher *tfm)
372{
373 return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
374}
375
376static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
377 u32 type, u32 mask)
378{
379 return crypto_attr_alg(tb[1], type, mask);
380}
381
382static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
383{
384 return (type ^ off) & mask & off;
385}
386
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391static inline int crypto_requires_sync(u32 type, u32 mask)
392{
393 return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
394}
395
396noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
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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
413static inline void crypto_yield(u32 flags)
414{
415#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
416 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
417 cond_resched();
418#endif
419}
420
421#endif
422