1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * Hash algorithms.
  4 * 
  5 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
  6 */
  7
  8#ifndef _CRYPTO_INTERNAL_HASH_H
  9#define _CRYPTO_INTERNAL_HASH_H
 10
 11#include <crypto/algapi.h>
 12#include <crypto/hash.h>
 13
 14struct ahash_request;
 15struct scatterlist;
 16
 17struct crypto_hash_walk {
 18	char *data;
 19
 20	unsigned int offset;
 21	unsigned int flags;
 22
 23	struct page *pg;
 24	unsigned int entrylen;
 25
 26	unsigned int total;
 27	struct scatterlist *sg;
 28};
 29
 30struct ahash_instance {
 31	void (*free)(struct ahash_instance *inst);
 32	union {
 33		struct {
 34			char head[offsetof(struct ahash_alg, halg.base)];
 35			struct crypto_instance base;
 36		} s;
 37		struct ahash_alg alg;
 38	};
 39};
 40
 41struct shash_instance {
 42	void (*free)(struct shash_instance *inst);
 43	union {
 44		struct {
 45			char head[offsetof(struct shash_alg, base)];
 46			struct crypto_instance base;
 47		} s;
 48		struct shash_alg alg;
 49	};
 50};
 51
 52struct crypto_ahash_spawn {
 53	struct crypto_spawn base;
 54};
 55
 56struct crypto_shash_spawn {
 57	struct crypto_spawn base;
 58};
 59
 60int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
 61int crypto_hash_walk_first(struct ahash_request *req,
 62			   struct crypto_hash_walk *walk);
 63
 64static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
 65{
 66	return !(walk->entrylen | walk->total);
 67}
 68
 69int crypto_register_ahash(struct ahash_alg *alg);
 70void crypto_unregister_ahash(struct ahash_alg *alg);
 71int crypto_register_ahashes(struct ahash_alg *algs, int count);
 72void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
 73int ahash_register_instance(struct crypto_template *tmpl,
 74			    struct ahash_instance *inst);
 75
 76int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
 77		    unsigned int keylen);
 78
 79static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
 80{
 81	return alg->setkey != shash_no_setkey;
 82}
 83
 84static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg)
 85{
 86	return crypto_shash_alg_has_setkey(alg) &&
 87		!(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
 88}
 89
 90int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
 91		      struct crypto_instance *inst,
 92		      const char *name, u32 type, u32 mask);
 93
 94static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
 95{
 96	crypto_drop_spawn(&spawn->base);
 97}
 98
 99static inline struct hash_alg_common *crypto_spawn_ahash_alg(
100	struct crypto_ahash_spawn *spawn)
101{
102	return __crypto_hash_alg_common(spawn->base.alg);
103}
104
105int crypto_register_shash(struct shash_alg *alg);
106void crypto_unregister_shash(struct shash_alg *alg);
107int crypto_register_shashes(struct shash_alg *algs, int count);
108void crypto_unregister_shashes(struct shash_alg *algs, int count);
109int shash_register_instance(struct crypto_template *tmpl,
110			    struct shash_instance *inst);
111void shash_free_singlespawn_instance(struct shash_instance *inst);
112
113int crypto_grab_shash(struct crypto_shash_spawn *spawn,
114		      struct crypto_instance *inst,
115		      const char *name, u32 type, u32 mask);
116
117static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
118{
119	crypto_drop_spawn(&spawn->base);
120}
121
122static inline struct shash_alg *crypto_spawn_shash_alg(
123	struct crypto_shash_spawn *spawn)
124{
125	return __crypto_shash_alg(spawn->base.alg);
126}
127
128int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
129int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
130int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
131
132static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
133{
134	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
135}
136
137static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm)
138{
139	return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
140}
141
142static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
143{
144	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
145			    halg);
146}
147
148static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash)
149{
150	return container_of(crypto_hash_alg_common(hash), struct ahash_alg,
151			    halg);
152}
153
154static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm,
155					      unsigned int size)
156{
157	tfm->statesize = size;
158}
159
160static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
161					    unsigned int reqsize)
162{
163	tfm->reqsize = reqsize;
164}
165
166static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,
167						unsigned int reqsize)
168{
169	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
170	ahash->reqsize = reqsize;
171}
172
173static inline struct crypto_instance *ahash_crypto_instance(
174	struct ahash_instance *inst)
175{
176	return &inst->s.base;
177}
178
179static inline struct ahash_instance *ahash_instance(
180	struct crypto_instance *inst)
181{
182	return container_of(inst, struct ahash_instance, s.base);
183}
184
185static inline struct ahash_instance *ahash_alg_instance(
186	struct crypto_ahash *ahash)
187{
188	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
189}
190
191static inline void *ahash_instance_ctx(struct ahash_instance *inst)
192{
193	return crypto_instance_ctx(ahash_crypto_instance(inst));
194}
195
196static inline void *ahash_request_ctx_dma(struct ahash_request *req)
197{
198	unsigned int align = crypto_dma_align();
199
200	if (align <= crypto_tfm_ctx_alignment())
201		align = 1;
202
203	return PTR_ALIGN(ahash_request_ctx(req), align);
204}
205
206static inline void ahash_request_complete(struct ahash_request *req, int err)
207{
208	crypto_request_complete(&req->base, err);
209}
210
211static inline u32 ahash_request_flags(struct ahash_request *req)
212{
213	return req->base.flags;
214}
215
216static inline struct crypto_ahash *crypto_spawn_ahash(
217	struct crypto_ahash_spawn *spawn)
218{
219	return crypto_spawn_tfm2(&spawn->base);
220}
221
222static inline int ahash_enqueue_request(struct crypto_queue *queue,
223					     struct ahash_request *request)
224{
225	return crypto_enqueue_request(queue, &request->base);
226}
227
228static inline struct ahash_request *ahash_dequeue_request(
229	struct crypto_queue *queue)
230{
231	return ahash_request_cast(crypto_dequeue_request(queue));
232}
233
234static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
235{
236	return crypto_tfm_ctx(&tfm->base);
237}
238
239static inline struct crypto_instance *shash_crypto_instance(
240	struct shash_instance *inst)
241{
242	return &inst->s.base;
243}
244
245static inline struct shash_instance *shash_instance(
246	struct crypto_instance *inst)
247{
248	return container_of(inst, struct shash_instance, s.base);
249}
250
251static inline struct shash_instance *shash_alg_instance(
252	struct crypto_shash *shash)
253{
254	return shash_instance(crypto_tfm_alg_instance(&shash->base));
255}
256
257static inline void *shash_instance_ctx(struct shash_instance *inst)
258{
259	return crypto_instance_ctx(shash_crypto_instance(inst));
260}
261
262static inline struct crypto_shash *crypto_spawn_shash(
263	struct crypto_shash_spawn *spawn)
264{
265	return crypto_spawn_tfm2(&spawn->base);
266}
267
268static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
269{
270	return container_of(tfm, struct crypto_shash, base);
271}
272
273#endif	/* _CRYPTO_INTERNAL_HASH_H */
274