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_ahash_walk_first(struct ahash_request *req, 59 struct crypto_hash_walk *walk); 60 61 static 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 67 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 68 { 69 return !(walk->entrylen | walk->total); 70 } 71 72 static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk) 73 { 74 return crypto_hash_walk_last(walk); 75 } 76 77 int crypto_register_ahash(struct ahash_alg *alg); 78 int crypto_unregister_ahash(struct ahash_alg *alg); 79 int ahash_register_instance(struct crypto_template *tmpl, 80 struct ahash_instance *inst); 81 void ahash_free_instance(struct crypto_instance *inst); 82 83 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, 84 struct hash_alg_common *alg, 85 struct crypto_instance *inst); 86 87 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 88 { 89 crypto_drop_spawn(&spawn->base); 90 } 91 92 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 93 94 int crypto_register_shash(struct shash_alg *alg); 95 int crypto_unregister_shash(struct shash_alg *alg); 96 int crypto_register_shashes(struct shash_alg *algs, int count); 97 int crypto_unregister_shashes(struct shash_alg *algs, int count); 98 int shash_register_instance(struct crypto_template *tmpl, 99 struct shash_instance *inst); 100 void shash_free_instance(struct crypto_instance *inst); 101 102 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, 103 struct shash_alg *alg, 104 struct crypto_instance *inst); 105 106 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 107 { 108 crypto_drop_spawn(&spawn->base); 109 } 110 111 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 112 113 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 114 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 115 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 116 117 int ahash_mcryptd_update(struct ahash_request *desc); 118 int ahash_mcryptd_final(struct ahash_request *desc); 119 int ahash_mcryptd_finup(struct ahash_request *desc); 120 int ahash_mcryptd_digest(struct ahash_request *desc); 121 122 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 123 124 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 125 { 126 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 127 } 128 129 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 130 { 131 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 132 halg); 133 } 134 135 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 136 unsigned int reqsize) 137 { 138 tfm->reqsize = reqsize; 139 } 140 141 static inline struct crypto_instance *ahash_crypto_instance( 142 struct ahash_instance *inst) 143 { 144 return container_of(&inst->alg.halg.base, struct crypto_instance, alg); 145 } 146 147 static inline struct ahash_instance *ahash_instance( 148 struct crypto_instance *inst) 149 { 150 return container_of(&inst->alg, struct ahash_instance, alg.halg.base); 151 } 152 153 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 154 { 155 return crypto_instance_ctx(ahash_crypto_instance(inst)); 156 } 157 158 static inline unsigned int ahash_instance_headroom(void) 159 { 160 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg); 161 } 162 163 static inline struct ahash_instance *ahash_alloc_instance( 164 const char *name, struct crypto_alg *alg) 165 { 166 return crypto_alloc_instance2(name, alg, ahash_instance_headroom()); 167 } 168 169 static inline struct crypto_ahash *crypto_spawn_ahash( 170 struct crypto_ahash_spawn *spawn) 171 { 172 return crypto_spawn_tfm2(&spawn->base); 173 } 174 175 static inline int ahash_enqueue_request(struct crypto_queue *queue, 176 struct ahash_request *request) 177 { 178 return crypto_enqueue_request(queue, &request->base); 179 } 180 181 static inline struct ahash_request *ahash_dequeue_request( 182 struct crypto_queue *queue) 183 { 184 return ahash_request_cast(crypto_dequeue_request(queue)); 185 } 186 187 static inline int ahash_tfm_in_queue(struct crypto_queue *queue, 188 struct crypto_ahash *tfm) 189 { 190 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); 191 } 192 193 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 194 { 195 return crypto_tfm_ctx(&tfm->base); 196 } 197 198 static inline struct crypto_instance *shash_crypto_instance( 199 struct shash_instance *inst) 200 { 201 return container_of(&inst->alg.base, struct crypto_instance, alg); 202 } 203 204 static inline struct shash_instance *shash_instance( 205 struct crypto_instance *inst) 206 { 207 return container_of(__crypto_shash_alg(&inst->alg), 208 struct shash_instance, alg); 209 } 210 211 static inline void *shash_instance_ctx(struct shash_instance *inst) 212 { 213 return crypto_instance_ctx(shash_crypto_instance(inst)); 214 } 215 216 static inline struct shash_instance *shash_alloc_instance( 217 const char *name, struct crypto_alg *alg) 218 { 219 return crypto_alloc_instance2(name, alg, 220 sizeof(struct shash_alg) - sizeof(*alg)); 221 } 222 223 static inline struct crypto_shash *crypto_spawn_shash( 224 struct crypto_shash_spawn *spawn) 225 { 226 return crypto_spawn_tfm2(&spawn->base); 227 } 228 229 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 230 { 231 return crypto_tfm_ctx_aligned(&tfm->base); 232 } 233 234 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 235 { 236 return container_of(tfm, struct crypto_shash, base); 237 } 238 239 #endif /* _CRYPTO_INTERNAL_HASH_H */ 240 241