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