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