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 int crypto_hash_walk_first_compat(struct hash_desc *hdesc, 61 struct crypto_hash_walk *walk, 62 struct scatterlist *sg, unsigned int len); 63 64 static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk, 65 int err) 66 { 67 return crypto_hash_walk_done(walk, err); 68 } 69 70 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 71 { 72 return !(walk->entrylen | walk->total); 73 } 74 75 static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk) 76 { 77 return crypto_hash_walk_last(walk); 78 } 79 80 int crypto_register_ahash(struct ahash_alg *alg); 81 int crypto_unregister_ahash(struct ahash_alg *alg); 82 int ahash_register_instance(struct crypto_template *tmpl, 83 struct ahash_instance *inst); 84 void ahash_free_instance(struct crypto_instance *inst); 85 86 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, 87 struct hash_alg_common *alg, 88 struct crypto_instance *inst); 89 90 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 91 { 92 crypto_drop_spawn(&spawn->base); 93 } 94 95 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 96 97 int crypto_register_shash(struct shash_alg *alg); 98 int crypto_unregister_shash(struct shash_alg *alg); 99 int crypto_register_shashes(struct shash_alg *algs, int count); 100 int crypto_unregister_shashes(struct shash_alg *algs, int count); 101 int shash_register_instance(struct crypto_template *tmpl, 102 struct shash_instance *inst); 103 void shash_free_instance(struct crypto_instance *inst); 104 105 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, 106 struct shash_alg *alg, 107 struct crypto_instance *inst); 108 109 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 110 { 111 crypto_drop_spawn(&spawn->base); 112 } 113 114 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 115 116 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 117 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 118 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 119 120 int shash_ahash_mcryptd_update(struct ahash_request *req, 121 struct shash_desc *desc); 122 int shash_ahash_mcryptd_final(struct ahash_request *req, 123 struct shash_desc *desc); 124 int shash_ahash_mcryptd_finup(struct ahash_request *req, 125 struct shash_desc *desc); 126 int shash_ahash_mcryptd_digest(struct ahash_request *req, 127 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 struct crypto_ahash *crypto_spawn_ahash( 177 struct crypto_ahash_spawn *spawn) 178 { 179 return crypto_spawn_tfm2(&spawn->base); 180 } 181 182 static inline int ahash_enqueue_request(struct crypto_queue *queue, 183 struct ahash_request *request) 184 { 185 return crypto_enqueue_request(queue, &request->base); 186 } 187 188 static inline struct ahash_request *ahash_dequeue_request( 189 struct crypto_queue *queue) 190 { 191 return ahash_request_cast(crypto_dequeue_request(queue)); 192 } 193 194 static inline int ahash_tfm_in_queue(struct crypto_queue *queue, 195 struct crypto_ahash *tfm) 196 { 197 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); 198 } 199 200 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 201 { 202 return crypto_tfm_ctx(&tfm->base); 203 } 204 205 static inline struct crypto_instance *shash_crypto_instance( 206 struct shash_instance *inst) 207 { 208 return container_of(&inst->alg.base, struct crypto_instance, alg); 209 } 210 211 static inline struct shash_instance *shash_instance( 212 struct crypto_instance *inst) 213 { 214 return container_of(__crypto_shash_alg(&inst->alg), 215 struct shash_instance, alg); 216 } 217 218 static inline void *shash_instance_ctx(struct shash_instance *inst) 219 { 220 return crypto_instance_ctx(shash_crypto_instance(inst)); 221 } 222 223 static inline struct shash_instance *shash_alloc_instance( 224 const char *name, struct crypto_alg *alg) 225 { 226 return crypto_alloc_instance2(name, alg, 227 sizeof(struct shash_alg) - sizeof(*alg)); 228 } 229 230 static inline struct crypto_shash *crypto_spawn_shash( 231 struct crypto_shash_spawn *spawn) 232 { 233 return crypto_spawn_tfm2(&spawn->base); 234 } 235 236 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 237 { 238 return crypto_tfm_ctx_aligned(&tfm->base); 239 } 240 241 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 242 { 243 return container_of(tfm, struct crypto_shash, base); 244 } 245 246 #endif /* _CRYPTO_INTERNAL_HASH_H */ 247 248