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);
60int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
61				  struct crypto_hash_walk *walk,
62				  struct scatterlist *sg, unsigned int len);
63
64static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk,
65					 int err)
66{
67	return crypto_hash_walk_done(walk, err);
68}
69
70static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
71{
72	return !(walk->entrylen | walk->total);
73}
74
75static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk)
76{
77	return crypto_hash_walk_last(walk);
78}
79
80int crypto_register_ahash(struct ahash_alg *alg);
81int crypto_unregister_ahash(struct ahash_alg *alg);
82int ahash_register_instance(struct crypto_template *tmpl,
83			    struct ahash_instance *inst);
84void ahash_free_instance(struct crypto_instance *inst);
85
86int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
87			    struct hash_alg_common *alg,
88			    struct crypto_instance *inst);
89
90static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
91{
92	crypto_drop_spawn(&spawn->base);
93}
94
95struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
96
97int crypto_register_shash(struct shash_alg *alg);
98int crypto_unregister_shash(struct shash_alg *alg);
99int crypto_register_shashes(struct shash_alg *algs, int count);
100int crypto_unregister_shashes(struct shash_alg *algs, int count);
101int shash_register_instance(struct crypto_template *tmpl,
102			    struct shash_instance *inst);
103void shash_free_instance(struct crypto_instance *inst);
104
105int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
106			    struct shash_alg *alg,
107			    struct crypto_instance *inst);
108
109static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
110{
111	crypto_drop_spawn(&spawn->base);
112}
113
114struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
115
116int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
117int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
118int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
119
120int shash_ahash_mcryptd_update(struct ahash_request *req,
121			       struct shash_desc *desc);
122int shash_ahash_mcryptd_final(struct ahash_request *req,
123			      struct shash_desc *desc);
124int shash_ahash_mcryptd_finup(struct ahash_request *req,
125			      struct shash_desc *desc);
126int shash_ahash_mcryptd_digest(struct ahash_request *req,
127			       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_instance2(name, alg, ahash_instance_headroom());
174}
175
176static inline struct crypto_ahash *crypto_spawn_ahash(
177	struct crypto_ahash_spawn *spawn)
178{
179	return crypto_spawn_tfm2(&spawn->base);
180}
181
182static inline int ahash_enqueue_request(struct crypto_queue *queue,
183					     struct ahash_request *request)
184{
185	return crypto_enqueue_request(queue, &request->base);
186}
187
188static inline struct ahash_request *ahash_dequeue_request(
189	struct crypto_queue *queue)
190{
191	return ahash_request_cast(crypto_dequeue_request(queue));
192}
193
194static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
195					  struct crypto_ahash *tfm)
196{
197	return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
198}
199
200static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
201{
202	return crypto_tfm_ctx(&tfm->base);
203}
204
205static inline struct crypto_instance *shash_crypto_instance(
206	struct shash_instance *inst)
207{
208	return container_of(&inst->alg.base, struct crypto_instance, alg);
209}
210
211static inline struct shash_instance *shash_instance(
212	struct crypto_instance *inst)
213{
214	return container_of(__crypto_shash_alg(&inst->alg),
215			    struct shash_instance, alg);
216}
217
218static inline void *shash_instance_ctx(struct shash_instance *inst)
219{
220	return crypto_instance_ctx(shash_crypto_instance(inst));
221}
222
223static inline struct shash_instance *shash_alloc_instance(
224	const char *name, struct crypto_alg *alg)
225{
226	return crypto_alloc_instance2(name, alg,
227				      sizeof(struct shash_alg) - sizeof(*alg));
228}
229
230static inline struct crypto_shash *crypto_spawn_shash(
231	struct crypto_shash_spawn *spawn)
232{
233	return crypto_spawn_tfm2(&spawn->base);
234}
235
236static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
237{
238	return crypto_tfm_ctx_aligned(&tfm->base);
239}
240
241static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
242{
243	return container_of(tfm, struct crypto_shash, base);
244}
245
246#endif	/* _CRYPTO_INTERNAL_HASH_H */
247
248