xref: /openbmc/linux/include/crypto/internal/hash.h (revision 31e67366) 
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 struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
144 {
145 	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
146 			    halg);
147 }
148 
149 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
150 					    unsigned int reqsize)
151 {
152 	tfm->reqsize = reqsize;
153 }
154 
155 static inline struct crypto_instance *ahash_crypto_instance(
156 	struct ahash_instance *inst)
157 {
158 	return &inst->s.base;
159 }
160 
161 static inline struct ahash_instance *ahash_instance(
162 	struct crypto_instance *inst)
163 {
164 	return container_of(inst, struct ahash_instance, s.base);
165 }
166 
167 static inline struct ahash_instance *ahash_alg_instance(
168 	struct crypto_ahash *ahash)
169 {
170 	return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
171 }
172 
173 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
174 {
175 	return crypto_instance_ctx(ahash_crypto_instance(inst));
176 }
177 
178 static inline void ahash_request_complete(struct ahash_request *req, int err)
179 {
180 	req->base.complete(&req->base, err);
181 }
182 
183 static inline u32 ahash_request_flags(struct ahash_request *req)
184 {
185 	return req->base.flags;
186 }
187 
188 static inline struct crypto_ahash *crypto_spawn_ahash(
189 	struct crypto_ahash_spawn *spawn)
190 {
191 	return crypto_spawn_tfm2(&spawn->base);
192 }
193 
194 static inline int ahash_enqueue_request(struct crypto_queue *queue,
195 					     struct ahash_request *request)
196 {
197 	return crypto_enqueue_request(queue, &request->base);
198 }
199 
200 static inline struct ahash_request *ahash_dequeue_request(
201 	struct crypto_queue *queue)
202 {
203 	return ahash_request_cast(crypto_dequeue_request(queue));
204 }
205 
206 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
207 {
208 	return crypto_tfm_ctx(&tfm->base);
209 }
210 
211 static inline struct crypto_instance *shash_crypto_instance(
212 	struct shash_instance *inst)
213 {
214 	return &inst->s.base;
215 }
216 
217 static inline struct shash_instance *shash_instance(
218 	struct crypto_instance *inst)
219 {
220 	return container_of(inst, struct shash_instance, s.base);
221 }
222 
223 static inline struct shash_instance *shash_alg_instance(
224 	struct crypto_shash *shash)
225 {
226 	return shash_instance(crypto_tfm_alg_instance(&shash->base));
227 }
228 
229 static inline void *shash_instance_ctx(struct shash_instance *inst)
230 {
231 	return crypto_instance_ctx(shash_crypto_instance(inst));
232 }
233 
234 static inline struct crypto_shash *crypto_spawn_shash(
235 	struct crypto_shash_spawn *spawn)
236 {
237 	return crypto_spawn_tfm2(&spawn->base);
238 }
239 
240 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
241 {
242 	return crypto_tfm_ctx_aligned(&tfm->base);
243 }
244 
245 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
246 {
247 	return container_of(tfm, struct crypto_shash, base);
248 }
249 
250 #endif	/* _CRYPTO_INTERNAL_HASH_H */
251 
252