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_hash_walk_first_compat(struct hash_desc *hdesc, 59 struct crypto_hash_walk *walk, 60 struct scatterlist *sg, unsigned int len); 61 62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 63 { 64 return !(walk->entrylen | walk->total); 65 } 66 67 int crypto_register_ahash(struct ahash_alg *alg); 68 int crypto_unregister_ahash(struct ahash_alg *alg); 69 int ahash_register_instance(struct crypto_template *tmpl, 70 struct ahash_instance *inst); 71 void ahash_free_instance(struct crypto_instance *inst); 72 73 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, 74 struct hash_alg_common *alg, 75 struct crypto_instance *inst); 76 77 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 78 { 79 crypto_drop_spawn(&spawn->base); 80 } 81 82 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 83 84 int crypto_register_shash(struct shash_alg *alg); 85 int crypto_unregister_shash(struct shash_alg *alg); 86 int crypto_register_shashes(struct shash_alg *algs, int count); 87 int crypto_unregister_shashes(struct shash_alg *algs, int count); 88 int shash_register_instance(struct crypto_template *tmpl, 89 struct shash_instance *inst); 90 void shash_free_instance(struct crypto_instance *inst); 91 92 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, 93 struct shash_alg *alg, 94 struct crypto_instance *inst); 95 96 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 97 { 98 crypto_drop_spawn(&spawn->base); 99 } 100 101 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 102 103 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 104 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 105 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 106 107 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 108 109 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 110 { 111 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 112 } 113 114 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 115 { 116 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 117 halg); 118 } 119 120 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 121 unsigned int reqsize) 122 { 123 tfm->reqsize = reqsize; 124 } 125 126 static inline struct crypto_instance *ahash_crypto_instance( 127 struct ahash_instance *inst) 128 { 129 return container_of(&inst->alg.halg.base, struct crypto_instance, alg); 130 } 131 132 static inline struct ahash_instance *ahash_instance( 133 struct crypto_instance *inst) 134 { 135 return container_of(&inst->alg, struct ahash_instance, alg.halg.base); 136 } 137 138 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 139 { 140 return crypto_instance_ctx(ahash_crypto_instance(inst)); 141 } 142 143 static inline unsigned int ahash_instance_headroom(void) 144 { 145 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg); 146 } 147 148 static inline struct ahash_instance *ahash_alloc_instance( 149 const char *name, struct crypto_alg *alg) 150 { 151 return crypto_alloc_instance2(name, alg, ahash_instance_headroom()); 152 } 153 154 static inline struct crypto_ahash *crypto_spawn_ahash( 155 struct crypto_ahash_spawn *spawn) 156 { 157 return crypto_spawn_tfm2(&spawn->base); 158 } 159 160 static inline int ahash_enqueue_request(struct crypto_queue *queue, 161 struct ahash_request *request) 162 { 163 return crypto_enqueue_request(queue, &request->base); 164 } 165 166 static inline struct ahash_request *ahash_dequeue_request( 167 struct crypto_queue *queue) 168 { 169 return ahash_request_cast(crypto_dequeue_request(queue)); 170 } 171 172 static inline int ahash_tfm_in_queue(struct crypto_queue *queue, 173 struct crypto_ahash *tfm) 174 { 175 return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm)); 176 } 177 178 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 179 { 180 return crypto_tfm_ctx(&tfm->base); 181 } 182 183 static inline struct crypto_instance *shash_crypto_instance( 184 struct shash_instance *inst) 185 { 186 return container_of(&inst->alg.base, struct crypto_instance, alg); 187 } 188 189 static inline struct shash_instance *shash_instance( 190 struct crypto_instance *inst) 191 { 192 return container_of(__crypto_shash_alg(&inst->alg), 193 struct shash_instance, alg); 194 } 195 196 static inline void *shash_instance_ctx(struct shash_instance *inst) 197 { 198 return crypto_instance_ctx(shash_crypto_instance(inst)); 199 } 200 201 static inline struct shash_instance *shash_alloc_instance( 202 const char *name, struct crypto_alg *alg) 203 { 204 return crypto_alloc_instance2(name, alg, 205 sizeof(struct shash_alg) - sizeof(*alg)); 206 } 207 208 static inline struct crypto_shash *crypto_spawn_shash( 209 struct crypto_shash_spawn *spawn) 210 { 211 return crypto_spawn_tfm2(&spawn->base); 212 } 213 214 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 215 { 216 return crypto_tfm_ctx_aligned(&tfm->base); 217 } 218 219 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 220 { 221 return container_of(tfm, struct crypto_shash, base); 222 } 223 224 #endif /* _CRYPTO_INTERNAL_HASH_H */ 225 226