xref: /openbmc/linux/include/crypto/internal/hash.h (revision 35e6bcd1)
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 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
137 {
138 	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
139 }
140 
141 static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm)
142 {
143 	return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
144 }
145 
146 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
147 {
148 	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
149 			    halg);
150 }
151 
152 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
153 					    unsigned int reqsize)
154 {
155 	tfm->reqsize = reqsize;
156 }
157 
158 static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,
159 						unsigned int reqsize)
160 {
161 	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
162 	ahash->reqsize = reqsize;
163 }
164 
165 static inline struct crypto_instance *ahash_crypto_instance(
166 	struct ahash_instance *inst)
167 {
168 	return &inst->s.base;
169 }
170 
171 static inline struct ahash_instance *ahash_instance(
172 	struct crypto_instance *inst)
173 {
174 	return container_of(inst, struct ahash_instance, s.base);
175 }
176 
177 static inline struct ahash_instance *ahash_alg_instance(
178 	struct crypto_ahash *ahash)
179 {
180 	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
181 }
182 
183 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
184 {
185 	return crypto_instance_ctx(ahash_crypto_instance(inst));
186 }
187 
188 static inline void *ahash_request_ctx_dma(struct ahash_request *req)
189 {
190 	unsigned int align = crypto_dma_align();
191 
192 	if (align <= crypto_tfm_ctx_alignment())
193 		align = 1;
194 
195 	return PTR_ALIGN(ahash_request_ctx(req), align);
196 }
197 
198 static inline void ahash_request_complete(struct ahash_request *req, int err)
199 {
200 	crypto_request_complete(&req->base, err);
201 }
202 
203 static inline u32 ahash_request_flags(struct ahash_request *req)
204 {
205 	return req->base.flags;
206 }
207 
208 static inline struct crypto_ahash *crypto_spawn_ahash(
209 	struct crypto_ahash_spawn *spawn)
210 {
211 	return crypto_spawn_tfm2(&spawn->base);
212 }
213 
214 static inline int ahash_enqueue_request(struct crypto_queue *queue,
215 					     struct ahash_request *request)
216 {
217 	return crypto_enqueue_request(queue, &request->base);
218 }
219 
220 static inline struct ahash_request *ahash_dequeue_request(
221 	struct crypto_queue *queue)
222 {
223 	return ahash_request_cast(crypto_dequeue_request(queue));
224 }
225 
226 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
227 {
228 	return crypto_tfm_ctx(&tfm->base);
229 }
230 
231 static inline struct crypto_instance *shash_crypto_instance(
232 	struct shash_instance *inst)
233 {
234 	return &inst->s.base;
235 }
236 
237 static inline struct shash_instance *shash_instance(
238 	struct crypto_instance *inst)
239 {
240 	return container_of(inst, struct shash_instance, s.base);
241 }
242 
243 static inline struct shash_instance *shash_alg_instance(
244 	struct crypto_shash *shash)
245 {
246 	return shash_instance(crypto_tfm_alg_instance(&shash->base));
247 }
248 
249 static inline void *shash_instance_ctx(struct shash_instance *inst)
250 {
251 	return crypto_instance_ctx(shash_crypto_instance(inst));
252 }
253 
254 static inline struct crypto_shash *crypto_spawn_shash(
255 	struct crypto_shash_spawn *spawn)
256 {
257 	return crypto_spawn_tfm2(&spawn->base);
258 }
259 
260 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
261 {
262 	return crypto_tfm_ctx_aligned(&tfm->base);
263 }
264 
265 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
266 {
267 	return container_of(tfm, struct crypto_shash, base);
268 }
269 
270 #endif	/* _CRYPTO_INTERNAL_HASH_H */
271 
272