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
14 struct ahash_request;
15 struct scatterlist;
16
17 struct 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
32 struct 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
43 struct 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
54 struct crypto_ahash_spawn {
55 struct crypto_spawn base;
56 };
57
58 struct crypto_shash_spawn {
59 struct crypto_spawn base;
60 };
61
62 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
63 int crypto_hash_walk_first(struct ahash_request *req,
64 struct crypto_hash_walk *walk);
65
66 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
67 {
68 return !(walk->entrylen | walk->total);
69 }
70
71 int crypto_register_ahash(struct ahash_alg *alg);
72 void crypto_unregister_ahash(struct ahash_alg *alg);
73 int crypto_register_ahashes(struct ahash_alg *algs, int count);
74 void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
75 int ahash_register_instance(struct crypto_template *tmpl,
76 struct ahash_instance *inst);
77
78 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
79 unsigned int keylen);
80
81 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
82 {
83 return alg->setkey != shash_no_setkey;
84 }
85
86 static 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
92 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
93
94 int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
95 struct crypto_instance *inst,
96 const char *name, u32 type, u32 mask);
97
98 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
99 {
100 crypto_drop_spawn(&spawn->base);
101 }
102
103 static 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
109 int crypto_register_shash(struct shash_alg *alg);
110 void crypto_unregister_shash(struct shash_alg *alg);
111 int crypto_register_shashes(struct shash_alg *algs, int count);
112 void crypto_unregister_shashes(struct shash_alg *algs, int count);
113 int shash_register_instance(struct crypto_template *tmpl,
114 struct shash_instance *inst);
115 void shash_free_singlespawn_instance(struct shash_instance *inst);
116
117 int crypto_grab_shash(struct crypto_shash_spawn *spawn,
118 struct crypto_instance *inst,
119 const char *name, u32 type, u32 mask);
120
121 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
122 {
123 crypto_drop_spawn(&spawn->base);
124 }
125
126 static 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
132 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
133 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
134 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
135
136 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
137
138 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
139 {
140 return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
141 }
142
143 static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm)
144 {
145 return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
146 }
147
148 static 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
154 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
155 unsigned int reqsize)
156 {
157 tfm->reqsize = reqsize;
158 }
159
160 static 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
167 static inline struct crypto_instance *ahash_crypto_instance(
168 struct ahash_instance *inst)
169 {
170 return &inst->s.base;
171 }
172
173 static inline struct ahash_instance *ahash_instance(
174 struct crypto_instance *inst)
175 {
176 return container_of(inst, struct ahash_instance, s.base);
177 }
178
179 static 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
185 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
186 {
187 return crypto_instance_ctx(ahash_crypto_instance(inst));
188 }
189
190 static 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
200 static inline void ahash_request_complete(struct ahash_request *req, int err)
201 {
202 crypto_request_complete(&req->base, err);
203 }
204
205 static inline u32 ahash_request_flags(struct ahash_request *req)
206 {
207 return req->base.flags;
208 }
209
210 static inline struct crypto_ahash *crypto_spawn_ahash(
211 struct crypto_ahash_spawn *spawn)
212 {
213 return crypto_spawn_tfm2(&spawn->base);
214 }
215
216 static 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
222 static inline struct ahash_request *ahash_dequeue_request(
223 struct crypto_queue *queue)
224 {
225 return ahash_request_cast(crypto_dequeue_request(queue));
226 }
227
228 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
229 {
230 return crypto_tfm_ctx(&tfm->base);
231 }
232
233 static inline struct crypto_instance *shash_crypto_instance(
234 struct shash_instance *inst)
235 {
236 return &inst->s.base;
237 }
238
239 static inline struct shash_instance *shash_instance(
240 struct crypto_instance *inst)
241 {
242 return container_of(inst, struct shash_instance, s.base);
243 }
244
245 static 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
251 static inline void *shash_instance_ctx(struct shash_instance *inst)
252 {
253 return crypto_instance_ctx(shash_crypto_instance(inst));
254 }
255
256 static inline struct crypto_shash *crypto_spawn_shash(
257 struct crypto_shash_spawn *spawn)
258 {
259 return crypto_spawn_tfm2(&spawn->base);
260 }
261
262 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
263 {
264 return crypto_tfm_ctx_aligned(&tfm->base);
265 }
266
267 static 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
274
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