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