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