1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Hash algorithms. 4 * 5 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> 6 */ 7 8 #ifndef _CRYPTO_INTERNAL_HASH_H 9 #define _CRYPTO_INTERNAL_HASH_H 10 11 #include <crypto/algapi.h> 12 #include <crypto/hash.h> 13 14 struct ahash_request; 15 struct scatterlist; 16 17 struct crypto_hash_walk { 18 char *data; 19 20 unsigned int offset; 21 unsigned int alignmask; 22 23 struct page *pg; 24 unsigned int entrylen; 25 26 unsigned int total; 27 struct scatterlist *sg; 28 29 unsigned int flags; 30 }; 31 32 struct ahash_instance { 33 struct ahash_alg alg; 34 }; 35 36 struct shash_instance { 37 struct shash_alg alg; 38 }; 39 40 struct crypto_ahash_spawn { 41 struct crypto_spawn base; 42 }; 43 44 struct crypto_shash_spawn { 45 struct crypto_spawn base; 46 }; 47 48 extern const struct crypto_type crypto_ahash_type; 49 50 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err); 51 int crypto_hash_walk_first(struct ahash_request *req, 52 struct crypto_hash_walk *walk); 53 int crypto_ahash_walk_first(struct ahash_request *req, 54 struct crypto_hash_walk *walk); 55 56 static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk, 57 int err) 58 { 59 return crypto_hash_walk_done(walk, err); 60 } 61 62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 63 { 64 return !(walk->entrylen | walk->total); 65 } 66 67 static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk) 68 { 69 return crypto_hash_walk_last(walk); 70 } 71 72 int crypto_register_ahash(struct ahash_alg *alg); 73 void crypto_unregister_ahash(struct ahash_alg *alg); 74 int crypto_register_ahashes(struct ahash_alg *algs, int count); 75 void crypto_unregister_ahashes(struct ahash_alg *algs, int count); 76 int ahash_register_instance(struct crypto_template *tmpl, 77 struct ahash_instance *inst); 78 void ahash_free_instance(struct crypto_instance *inst); 79 80 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, 81 unsigned int keylen); 82 83 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg) 84 { 85 return alg->setkey != shash_no_setkey; 86 } 87 88 static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg) 89 { 90 return crypto_shash_alg_has_setkey(alg) && 91 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY); 92 } 93 94 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg); 95 96 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, 97 struct hash_alg_common *alg, 98 struct crypto_instance *inst); 99 100 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 101 { 102 crypto_drop_spawn(&spawn->base); 103 } 104 105 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 106 107 int crypto_register_shash(struct shash_alg *alg); 108 void crypto_unregister_shash(struct shash_alg *alg); 109 int crypto_register_shashes(struct shash_alg *algs, int count); 110 void crypto_unregister_shashes(struct shash_alg *algs, int count); 111 int shash_register_instance(struct crypto_template *tmpl, 112 struct shash_instance *inst); 113 void shash_free_instance(struct crypto_instance *inst); 114 115 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, 116 struct shash_alg *alg, 117 struct crypto_instance *inst); 118 119 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 120 { 121 crypto_drop_spawn(&spawn->base); 122 } 123 124 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask); 125 126 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 127 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 128 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 129 130 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 131 132 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 133 { 134 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 135 } 136 137 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 138 { 139 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 140 halg); 141 } 142 143 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 144 unsigned int reqsize) 145 { 146 tfm->reqsize = reqsize; 147 } 148 149 static inline struct crypto_instance *ahash_crypto_instance( 150 struct ahash_instance *inst) 151 { 152 return container_of(&inst->alg.halg.base, struct crypto_instance, alg); 153 } 154 155 static inline struct ahash_instance *ahash_instance( 156 struct crypto_instance *inst) 157 { 158 return container_of(&inst->alg, struct ahash_instance, alg.halg.base); 159 } 160 161 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 162 { 163 return crypto_instance_ctx(ahash_crypto_instance(inst)); 164 } 165 166 static inline unsigned int ahash_instance_headroom(void) 167 { 168 return sizeof(struct ahash_alg) - sizeof(struct crypto_alg); 169 } 170 171 static inline struct ahash_instance *ahash_alloc_instance( 172 const char *name, struct crypto_alg *alg) 173 { 174 return crypto_alloc_instance(name, alg, ahash_instance_headroom()); 175 } 176 177 static inline void ahash_request_complete(struct ahash_request *req, int err) 178 { 179 req->base.complete(&req->base, err); 180 } 181 182 static inline u32 ahash_request_flags(struct ahash_request *req) 183 { 184 return req->base.flags; 185 } 186 187 static inline struct crypto_ahash *crypto_spawn_ahash( 188 struct crypto_ahash_spawn *spawn) 189 { 190 return crypto_spawn_tfm2(&spawn->base); 191 } 192 193 static inline int ahash_enqueue_request(struct crypto_queue *queue, 194 struct ahash_request *request) 195 { 196 return crypto_enqueue_request(queue, &request->base); 197 } 198 199 static inline struct ahash_request *ahash_dequeue_request( 200 struct crypto_queue *queue) 201 { 202 return ahash_request_cast(crypto_dequeue_request(queue)); 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 struct shash_instance *shash_alg_instance( 224 struct crypto_shash *shash) 225 { 226 return shash_instance(crypto_tfm_alg_instance(&shash->base)); 227 } 228 229 static inline void *shash_instance_ctx(struct shash_instance *inst) 230 { 231 return crypto_instance_ctx(shash_crypto_instance(inst)); 232 } 233 234 static inline struct shash_instance *shash_alloc_instance( 235 const char *name, struct crypto_alg *alg) 236 { 237 return crypto_alloc_instance(name, alg, 238 sizeof(struct shash_alg) - sizeof(*alg)); 239 } 240 241 static inline struct crypto_shash *crypto_spawn_shash( 242 struct crypto_shash_spawn *spawn) 243 { 244 return crypto_spawn_tfm2(&spawn->base); 245 } 246 247 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 248 { 249 return crypto_tfm_ctx_aligned(&tfm->base); 250 } 251 252 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 253 { 254 return container_of(tfm, struct crypto_shash, base); 255 } 256 257 #endif /* _CRYPTO_INTERNAL_HASH_H */ 258 259