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 shash_ahash_mcryptd_update(struct ahash_request *req, 118 struct shash_desc *desc); 119 int shash_ahash_mcryptd_final(struct ahash_request *req, 120 struct shash_desc *desc); 121 int shash_ahash_mcryptd_finup(struct ahash_request *req, 122 struct shash_desc *desc); 123 int shash_ahash_mcryptd_digest(struct ahash_request *req, 124 struct shash_desc *desc); 125 126 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 127 128 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 129 { 130 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 131 } 132 133 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 134 { 135 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 136 halg); 137 } 138 139 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 140 unsigned int reqsize) 141 { 142 tfm->reqsize = reqsize; 143 } 144 145 static inline struct crypto_instance *ahash_crypto_instance( 146 struct ahash_instance *inst) 147 { 148 return container_of(&inst->alg.halg.base, struct crypto_instance, alg); 149 } 150 151 static inline struct ahash_instance *ahash_instance( 152 struct crypto_instance *inst) 153 { 154 return container_of(&inst->alg, struct ahash_instance, alg.halg.base); 155 } 156 157 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 158 { 159 return crypto_instance_ctx(ahash_crypto_instance(inst)); 160 } 161 162 static inline unsigned int ahash_instance_headroom(void) 163 { 164 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg); 165 } 166 167 static inline struct ahash_instance *ahash_alloc_instance( 168 const char *name, struct crypto_alg *alg) 169 { 170 return crypto_alloc_instance2(name, alg, ahash_instance_headroom()); 171 } 172 173 static inline struct crypto_ahash *crypto_spawn_ahash( 174 struct crypto_ahash_spawn *spawn) 175 { 176 return crypto_spawn_tfm2(&spawn->base); 177 } 178 179 static inline int ahash_enqueue_request(struct crypto_queue *queue, 180 struct ahash_request *request) 181 { 182 return crypto_enqueue_request(queue, &request->base); 183 } 184 185 static inline struct ahash_request *ahash_dequeue_request( 186 struct crypto_queue *queue) 187 { 188 return ahash_request_cast(crypto_dequeue_request(queue)); 189 } 190 191 static inline int ahash_tfm_in_queue(struct crypto_queue *queue, 192 struct crypto_ahash *tfm) 193 { 194 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); 195 } 196 197 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 198 { 199 return crypto_tfm_ctx(&tfm->base); 200 } 201 202 static inline struct crypto_instance *shash_crypto_instance( 203 struct shash_instance *inst) 204 { 205 return container_of(&inst->alg.base, struct crypto_instance, alg); 206 } 207 208 static inline struct shash_instance *shash_instance( 209 struct crypto_instance *inst) 210 { 211 return container_of(__crypto_shash_alg(&inst->alg), 212 struct shash_instance, alg); 213 } 214 215 static inline void *shash_instance_ctx(struct shash_instance *inst) 216 { 217 return crypto_instance_ctx(shash_crypto_instance(inst)); 218 } 219 220 static inline struct shash_instance *shash_alloc_instance( 221 const char *name, struct crypto_alg *alg) 222 { 223 return crypto_alloc_instance2(name, alg, 224 sizeof(struct shash_alg) - sizeof(*alg)); 225 } 226 227 static inline struct crypto_shash *crypto_spawn_shash( 228 struct crypto_shash_spawn *spawn) 229 { 230 return crypto_spawn_tfm2(&spawn->base); 231 } 232 233 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 234 { 235 return crypto_tfm_ctx_aligned(&tfm->base); 236 } 237 238 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 239 { 240 return container_of(tfm, struct crypto_shash, base); 241 } 242 243 #endif /* _CRYPTO_INTERNAL_HASH_H */ 244 245