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
19struct ahash_request;
20struct scatterlist;
21
22struct 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
37struct ahash_instance {
38 struct ahash_alg alg;
39};
40
41struct shash_instance {
42 struct shash_alg alg;
43};
44
45struct crypto_ahash_spawn {
46 struct crypto_spawn base;
47};
48
49struct crypto_shash_spawn {
50 struct crypto_spawn base;
51};
52
53extern const struct crypto_type crypto_ahash_type;
54
55int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
56int crypto_hash_walk_first(struct ahash_request *req,
57 struct crypto_hash_walk *walk);
58int crypto_ahash_walk_first(struct ahash_request *req,
59 struct crypto_hash_walk *walk);
60
61static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk,
62 int err)
63{
64 return crypto_hash_walk_done(walk, err);
65}
66
67static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
68{
69 return !(walk->entrylen | walk->total);
70}
71
72static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk)
73{
74 return crypto_hash_walk_last(walk);
75}
76
77int crypto_register_ahash(struct ahash_alg *alg);
78int crypto_unregister_ahash(struct ahash_alg *alg);
79int crypto_register_ahashes(struct ahash_alg *algs, int count);
80void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
81int ahash_register_instance(struct crypto_template *tmpl,
82 struct ahash_instance *inst);
83void ahash_free_instance(struct crypto_instance *inst);
84
85int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
86 unsigned int keylen);
87
88static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
89{
90 return alg->setkey != shash_no_setkey;
91}
92
93bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
94
95int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
96 struct hash_alg_common *alg,
97 struct crypto_instance *inst);
98
99static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
100{
101 crypto_drop_spawn(&spawn->base);
102}
103
104struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
105
106int crypto_register_shash(struct shash_alg *alg);
107int crypto_unregister_shash(struct shash_alg *alg);
108int crypto_register_shashes(struct shash_alg *algs, int count);
109int crypto_unregister_shashes(struct shash_alg *algs, int count);
110int shash_register_instance(struct crypto_template *tmpl,
111 struct shash_instance *inst);
112void shash_free_instance(struct crypto_instance *inst);
113
114int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
115 struct shash_alg *alg,
116 struct crypto_instance *inst);
117
118static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
119{
120 crypto_drop_spawn(&spawn->base);
121}
122
123struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
124
125int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
126int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
127int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
128
129int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
130
131static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
132{
133 return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
134}
135
136static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
137{
138 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
139 halg);
140}
141
142static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
143 unsigned int reqsize)
144{
145 tfm->reqsize = reqsize;
146}
147
148static inline struct crypto_instance *ahash_crypto_instance(
149 struct ahash_instance *inst)
150{
151 return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
152}
153
154static inline struct ahash_instance *ahash_instance(
155 struct crypto_instance *inst)
156{
157 return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
158}
159
160static inline void *ahash_instance_ctx(struct ahash_instance *inst)
161{
162 return crypto_instance_ctx(ahash_crypto_instance(inst));
163}
164
165static inline unsigned int ahash_instance_headroom(void)
166{
167 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
168}
169
170static inline struct ahash_instance *ahash_alloc_instance(
171 const char *name, struct crypto_alg *alg)
172{
173 return crypto_alloc_instance(name, alg, ahash_instance_headroom());
174}
175
176static inline void ahash_request_complete(struct ahash_request *req, int err)
177{
178 req->base.complete(&req->base, err);
179}
180
181static inline u32 ahash_request_flags(struct ahash_request *req)
182{
183 return req->base.flags;
184}
185
186static inline struct crypto_ahash *crypto_spawn_ahash(
187 struct crypto_ahash_spawn *spawn)
188{
189 return crypto_spawn_tfm2(&spawn->base);
190}
191
192static inline int ahash_enqueue_request(struct crypto_queue *queue,
193 struct ahash_request *request)
194{
195 return crypto_enqueue_request(queue, &request->base);
196}
197
198static inline struct ahash_request *ahash_dequeue_request(
199 struct crypto_queue *queue)
200{
201 return ahash_request_cast(crypto_dequeue_request(queue));
202}
203
204static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
205 struct crypto_ahash *tfm)
206{
207 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
208}
209
210static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
211{
212 return crypto_tfm_ctx(&tfm->base);
213}
214
215static inline struct crypto_instance *shash_crypto_instance(
216 struct shash_instance *inst)
217{
218 return container_of(&inst->alg.base, struct crypto_instance, alg);
219}
220
221static inline struct shash_instance *shash_instance(
222 struct crypto_instance *inst)
223{
224 return container_of(__crypto_shash_alg(&inst->alg),
225 struct shash_instance, alg);
226}
227
228static inline void *shash_instance_ctx(struct shash_instance *inst)
229{
230 return crypto_instance_ctx(shash_crypto_instance(inst));
231}
232
233static inline struct shash_instance *shash_alloc_instance(
234 const char *name, struct crypto_alg *alg)
235{
236 return crypto_alloc_instance(name, alg,
237 sizeof(struct shash_alg) - sizeof(*alg));
238}
239
240static inline struct crypto_shash *crypto_spawn_shash(
241 struct crypto_shash_spawn *spawn)
242{
243 return crypto_spawn_tfm2(&spawn->base);
244}
245
246static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
247{
248 return crypto_tfm_ctx_aligned(&tfm->base);
249}
250
251static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
252{
253 return container_of(tfm, struct crypto_shash, base);
254}
255
256#endif /* _CRYPTO_INTERNAL_HASH_H */
257
258