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_hash_walk_first_compat(struct hash_desc *hdesc,
 59				  struct crypto_hash_walk *walk,
 60				  struct scatterlist *sg, unsigned int len);
 61
 62static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
 63{
 64	return !(walk->entrylen | walk->total);
 65}
 66
 67int crypto_register_ahash(struct ahash_alg *alg);
 68int crypto_unregister_ahash(struct ahash_alg *alg);
 69int ahash_register_instance(struct crypto_template *tmpl,
 70			    struct ahash_instance *inst);
 71void ahash_free_instance(struct crypto_instance *inst);
 72
 73int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
 74			    struct hash_alg_common *alg,
 75			    struct crypto_instance *inst);
 76
 77static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
 78{
 79	crypto_drop_spawn(&spawn->base);
 80}
 81
 82struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 83
 84int crypto_register_shash(struct shash_alg *alg);
 85int crypto_unregister_shash(struct shash_alg *alg);
 86int shash_register_instance(struct crypto_template *tmpl,
 87			    struct shash_instance *inst);
 88void shash_free_instance(struct crypto_instance *inst);
 89
 90int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 91			    struct shash_alg *alg,
 92			    struct crypto_instance *inst);
 93
 94static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 95{
 96	crypto_drop_spawn(&spawn->base);
 97}
 98
 99struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
100
101int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
102int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
103int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
104
105int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
106
107static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
108{
109	return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
110}
111
112static 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
118static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
119					    unsigned int reqsize)
120{
121	tfm->reqsize = reqsize;
122}
123
124static 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
130static 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
136static inline void *ahash_instance_ctx(struct ahash_instance *inst)
137{
138	return crypto_instance_ctx(ahash_crypto_instance(inst));
139}
140
141static inline unsigned int ahash_instance_headroom(void)
142{
143	return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
144}
145
146static 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
152static inline struct crypto_ahash *crypto_spawn_ahash(
153	struct crypto_ahash_spawn *spawn)
154{
155	return crypto_spawn_tfm2(&spawn->base);
156}
157
158static 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
164static inline struct ahash_request *ahash_dequeue_request(
165	struct crypto_queue *queue)
166{
167	return ahash_request_cast(crypto_dequeue_request(queue));
168}
169
170static 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
176static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
177{
178	return crypto_tfm_ctx(&tfm->base);
179}
180
181static 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
187static 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
194static inline void *shash_instance_ctx(struct shash_instance *inst)
195{
196	return crypto_instance_ctx(shash_crypto_instance(inst));
197}
198
199static 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
206static inline struct crypto_shash *crypto_spawn_shash(
207	struct crypto_shash_spawn *spawn)
208{
209	return crypto_spawn_tfm2(&spawn->base);
210}
211
212static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
213{
214	return crypto_tfm_ctx_aligned(&tfm->base);
215}
216
217static 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