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 crypto_register_ahashes(struct ahash_alg *algs, int count); 80 void crypto_unregister_ahashes(struct ahash_alg *algs, int count); 81 int ahash_register_instance(struct crypto_template *tmpl, 82 struct ahash_instance *inst); 83 void ahash_free_instance(struct crypto_instance *inst); 84 85 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, 86 unsigned int keylen); 87 88 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg) 89 { 90 return alg->setkey != shash_no_setkey; 91 } 92 93 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, 94 struct hash_alg_common *alg, 95 struct crypto_instance *inst); 96 97 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 98 { 99 crypto_drop_spawn(&spawn->base); 100 } 101 102 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 103 104 int crypto_register_shash(struct shash_alg *alg); 105 int crypto_unregister_shash(struct shash_alg *alg); 106 int crypto_register_shashes(struct shash_alg *algs, int count); 107 int crypto_unregister_shashes(struct shash_alg *algs, int count); 108 int shash_register_instance(struct crypto_template *tmpl, 109 struct shash_instance *inst); 110 void shash_free_instance(struct crypto_instance *inst); 111 112 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, 113 struct shash_alg *alg, 114 struct crypto_instance *inst); 115 116 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 117 { 118 crypto_drop_spawn(&spawn->base); 119 } 120 121 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 122 123 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 124 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 125 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 126 127 int ahash_mcryptd_update(struct ahash_request *desc); 128 int ahash_mcryptd_final(struct ahash_request *desc); 129 int ahash_mcryptd_finup(struct ahash_request *desc); 130 int ahash_mcryptd_digest(struct ahash_request *desc); 131 132 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 133 134 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 135 { 136 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 137 } 138 139 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 140 { 141 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 142 halg); 143 } 144 145 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 146 unsigned int reqsize) 147 { 148 tfm->reqsize = reqsize; 149 } 150 151 static inline struct crypto_instance *ahash_crypto_instance( 152 struct ahash_instance *inst) 153 { 154 return container_of(&inst->alg.halg.base, struct crypto_instance, alg); 155 } 156 157 static inline struct ahash_instance *ahash_instance( 158 struct crypto_instance *inst) 159 { 160 return container_of(&inst->alg, struct ahash_instance, alg.halg.base); 161 } 162 163 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 164 { 165 return crypto_instance_ctx(ahash_crypto_instance(inst)); 166 } 167 168 static inline unsigned int ahash_instance_headroom(void) 169 { 170 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg); 171 } 172 173 static inline struct ahash_instance *ahash_alloc_instance( 174 const char *name, struct crypto_alg *alg) 175 { 176 return crypto_alloc_instance2(name, alg, ahash_instance_headroom()); 177 } 178 179 static inline void ahash_request_complete(struct ahash_request *req, int err) 180 { 181 req->base.complete(&req->base, err); 182 } 183 184 static inline u32 ahash_request_flags(struct ahash_request *req) 185 { 186 return req->base.flags; 187 } 188 189 static inline struct crypto_ahash *crypto_spawn_ahash( 190 struct crypto_ahash_spawn *spawn) 191 { 192 return crypto_spawn_tfm2(&spawn->base); 193 } 194 195 static inline int ahash_enqueue_request(struct crypto_queue *queue, 196 struct ahash_request *request) 197 { 198 return crypto_enqueue_request(queue, &request->base); 199 } 200 201 static inline struct ahash_request *ahash_dequeue_request( 202 struct crypto_queue *queue) 203 { 204 return ahash_request_cast(crypto_dequeue_request(queue)); 205 } 206 207 static inline int ahash_tfm_in_queue(struct crypto_queue *queue, 208 struct crypto_ahash *tfm) 209 { 210 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); 211 } 212 213 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 214 { 215 return crypto_tfm_ctx(&tfm->base); 216 } 217 218 static inline struct crypto_instance *shash_crypto_instance( 219 struct shash_instance *inst) 220 { 221 return container_of(&inst->alg.base, struct crypto_instance, alg); 222 } 223 224 static inline struct shash_instance *shash_instance( 225 struct crypto_instance *inst) 226 { 227 return container_of(__crypto_shash_alg(&inst->alg), 228 struct shash_instance, alg); 229 } 230 231 static inline void *shash_instance_ctx(struct shash_instance *inst) 232 { 233 return crypto_instance_ctx(shash_crypto_instance(inst)); 234 } 235 236 static inline struct shash_instance *shash_alloc_instance( 237 const char *name, struct crypto_alg *alg) 238 { 239 return crypto_alloc_instance2(name, alg, 240 sizeof(struct shash_alg) - sizeof(*alg)); 241 } 242 243 static inline struct crypto_shash *crypto_spawn_shash( 244 struct crypto_shash_spawn *spawn) 245 { 246 return crypto_spawn_tfm2(&spawn->base); 247 } 248 249 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 250 { 251 return crypto_tfm_ctx_aligned(&tfm->base); 252 } 253 254 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 255 { 256 return container_of(tfm, struct crypto_shash, base); 257 } 258 259 #endif /* _CRYPTO_INTERNAL_HASH_H */ 260 261