1 /*
2  * Hash algorithms.
3  *
4  * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the Free
8  * Software Foundation; either version 2 of the License, or (at your option)
9  * any later version.
10  *
11  */
12 
13 #ifndef _CRYPTO_INTERNAL_HASH_H
14 #define _CRYPTO_INTERNAL_HASH_H
15 
16 #include <crypto/algapi.h>
17 #include <crypto/hash.h>
18 
19 struct ahash_request;
20 struct scatterlist;
21 
22 struct crypto_hash_walk {
23 	char *data;
24 
25 	unsigned int offset;
26 	unsigned int alignmask;
27 
28 	struct page *pg;
29 	unsigned int entrylen;
30 
31 	unsigned int total;
32 	struct scatterlist *sg;
33 
34 	unsigned int flags;
35 };
36 
37 struct ahash_instance {
38 	struct ahash_alg alg;
39 };
40 
41 struct shash_instance {
42 	struct shash_alg alg;
43 };
44 
45 struct crypto_ahash_spawn {
46 	struct crypto_spawn base;
47 };
48 
49 struct crypto_shash_spawn {
50 	struct crypto_spawn base;
51 };
52 
53 extern const struct crypto_type crypto_ahash_type;
54 
55 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
56 int crypto_hash_walk_first(struct ahash_request *req,
57 			   struct crypto_hash_walk *walk);
58 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
59 				  struct crypto_hash_walk *walk,
60 				  struct scatterlist *sg, unsigned int len);
61 
crypto_hash_walk_last(struct crypto_hash_walk * walk)62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
63 {
64 	return !(walk->entrylen | walk->total);
65 }
66 
67 int crypto_register_ahash(struct ahash_alg *alg);
68 int crypto_unregister_ahash(struct ahash_alg *alg);
69 int ahash_register_instance(struct crypto_template *tmpl,
70 			    struct ahash_instance *inst);
71 void ahash_free_instance(struct crypto_instance *inst);
72 
73 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
74 			    struct hash_alg_common *alg,
75 			    struct crypto_instance *inst);
76 
crypto_drop_ahash(struct crypto_ahash_spawn * spawn)77 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
78 {
79 	crypto_drop_spawn(&spawn->base);
80 }
81 
82 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
83 
84 int crypto_register_shash(struct shash_alg *alg);
85 int crypto_unregister_shash(struct shash_alg *alg);
86 int shash_register_instance(struct crypto_template *tmpl,
87 			    struct shash_instance *inst);
88 void shash_free_instance(struct crypto_instance *inst);
89 
90 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
91 			    struct shash_alg *alg,
92 			    struct crypto_instance *inst);
93 
crypto_drop_shash(struct crypto_shash_spawn * spawn)94 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
95 {
96 	crypto_drop_spawn(&spawn->base);
97 }
98 
99 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
100 
101 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
102 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
103 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
104 
105 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
106 
crypto_ahash_ctx(struct crypto_ahash * tfm)107 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
108 {
109 	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
110 }
111 
__crypto_ahash_alg(struct crypto_alg * alg)112 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
113 {
114 	return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
115 			    halg);
116 }
117 
crypto_ahash_set_reqsize(struct crypto_ahash * tfm,unsigned int reqsize)118 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
119 					    unsigned int reqsize)
120 {
121 	tfm->reqsize = reqsize;
122 }
123 
ahash_crypto_instance(struct ahash_instance * inst)124 static inline struct crypto_instance *ahash_crypto_instance(
125 	struct ahash_instance *inst)
126 {
127 	return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
128 }
129 
ahash_instance(struct crypto_instance * inst)130 static inline struct ahash_instance *ahash_instance(
131 	struct crypto_instance *inst)
132 {
133 	return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
134 }
135 
ahash_instance_ctx(struct ahash_instance * inst)136 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
137 {
138 	return crypto_instance_ctx(ahash_crypto_instance(inst));
139 }
140 
ahash_instance_headroom(void)141 static inline unsigned int ahash_instance_headroom(void)
142 {
143 	return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
144 }
145 
ahash_alloc_instance(const char * name,struct crypto_alg * alg)146 static inline struct ahash_instance *ahash_alloc_instance(
147 	const char *name, struct crypto_alg *alg)
148 {
149 	return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
150 }
151 
crypto_spawn_ahash(struct crypto_ahash_spawn * spawn)152 static inline struct crypto_ahash *crypto_spawn_ahash(
153 	struct crypto_ahash_spawn *spawn)
154 {
155 	return crypto_spawn_tfm2(&spawn->base);
156 }
157 
ahash_enqueue_request(struct crypto_queue * queue,struct ahash_request * request)158 static inline int ahash_enqueue_request(struct crypto_queue *queue,
159 					     struct ahash_request *request)
160 {
161 	return crypto_enqueue_request(queue, &request->base);
162 }
163 
ahash_dequeue_request(struct crypto_queue * queue)164 static inline struct ahash_request *ahash_dequeue_request(
165 	struct crypto_queue *queue)
166 {
167 	return ahash_request_cast(crypto_dequeue_request(queue));
168 }
169 
ahash_tfm_in_queue(struct crypto_queue * queue,struct crypto_ahash * tfm)170 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
171 					  struct crypto_ahash *tfm)
172 {
173 	return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
174 }
175 
crypto_shash_ctx(struct crypto_shash * tfm)176 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
177 {
178 	return crypto_tfm_ctx(&tfm->base);
179 }
180 
shash_crypto_instance(struct shash_instance * inst)181 static inline struct crypto_instance *shash_crypto_instance(
182 	struct shash_instance *inst)
183 {
184 	return container_of(&inst->alg.base, struct crypto_instance, alg);
185 }
186 
shash_instance(struct crypto_instance * inst)187 static inline struct shash_instance *shash_instance(
188 	struct crypto_instance *inst)
189 {
190 	return container_of(__crypto_shash_alg(&inst->alg),
191 			    struct shash_instance, alg);
192 }
193 
shash_instance_ctx(struct shash_instance * inst)194 static inline void *shash_instance_ctx(struct shash_instance *inst)
195 {
196 	return crypto_instance_ctx(shash_crypto_instance(inst));
197 }
198 
shash_alloc_instance(const char * name,struct crypto_alg * alg)199 static inline struct shash_instance *shash_alloc_instance(
200 	const char *name, struct crypto_alg *alg)
201 {
202 	return crypto_alloc_instance2(name, alg,
203 				      sizeof(struct shash_alg) - sizeof(*alg));
204 }
205 
crypto_spawn_shash(struct crypto_shash_spawn * spawn)206 static inline struct crypto_shash *crypto_spawn_shash(
207 	struct crypto_shash_spawn *spawn)
208 {
209 	return crypto_spawn_tfm2(&spawn->base);
210 }
211 
crypto_shash_ctx_aligned(struct crypto_shash * tfm)212 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
213 {
214 	return crypto_tfm_ctx_aligned(&tfm->base);
215 }
216 
__crypto_shash_cast(struct crypto_tfm * tfm)217 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
218 {
219 	return container_of(tfm, struct crypto_shash, base);
220 }
221 
222 #endif	/* _CRYPTO_INTERNAL_HASH_H */
223 
224