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