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 void (*free)(struct ahash_instance *inst); 34 union { 35 struct { 36 char head[offsetof(struct ahash_alg, halg.base)]; 37 struct crypto_instance base; 38 } s; 39 struct ahash_alg alg; 40 }; 41 }; 42 43 struct shash_instance { 44 void (*free)(struct shash_instance *inst); 45 union { 46 struct { 47 char head[offsetof(struct shash_alg, base)]; 48 struct crypto_instance base; 49 } s; 50 struct shash_alg alg; 51 }; 52 }; 53 54 struct crypto_ahash_spawn { 55 struct crypto_spawn base; 56 }; 57 58 struct crypto_shash_spawn { 59 struct crypto_spawn base; 60 }; 61 62 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err); 63 int crypto_hash_walk_first(struct ahash_request *req, 64 struct crypto_hash_walk *walk); 65 66 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 67 { 68 return !(walk->entrylen | walk->total); 69 } 70 71 int crypto_register_ahash(struct ahash_alg *alg); 72 void crypto_unregister_ahash(struct ahash_alg *alg); 73 int crypto_register_ahashes(struct ahash_alg *algs, int count); 74 void crypto_unregister_ahashes(struct ahash_alg *algs, int count); 75 int ahash_register_instance(struct crypto_template *tmpl, 76 struct ahash_instance *inst); 77 78 bool crypto_shash_alg_has_setkey(struct shash_alg *alg); 79 80 static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg) 81 { 82 return crypto_shash_alg_has_setkey(alg) && 83 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY); 84 } 85 86 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg); 87 88 int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, 89 struct crypto_instance *inst, 90 const char *name, u32 type, u32 mask); 91 92 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 93 { 94 crypto_drop_spawn(&spawn->base); 95 } 96 97 static inline struct hash_alg_common *crypto_spawn_ahash_alg( 98 struct crypto_ahash_spawn *spawn) 99 { 100 return __crypto_hash_alg_common(spawn->base.alg); 101 } 102 103 int crypto_register_shash(struct shash_alg *alg); 104 void crypto_unregister_shash(struct shash_alg *alg); 105 int crypto_register_shashes(struct shash_alg *algs, int count); 106 void crypto_unregister_shashes(struct shash_alg *algs, int count); 107 int shash_register_instance(struct crypto_template *tmpl, 108 struct shash_instance *inst); 109 void shash_free_singlespawn_instance(struct shash_instance *inst); 110 111 int crypto_grab_shash(struct crypto_shash_spawn *spawn, 112 struct crypto_instance *inst, 113 const char *name, u32 type, u32 mask); 114 115 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 116 { 117 crypto_drop_spawn(&spawn->base); 118 } 119 120 static inline struct shash_alg *crypto_spawn_shash_alg( 121 struct crypto_shash_spawn *spawn) 122 { 123 return __crypto_shash_alg(spawn->base.alg); 124 } 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 &inst->s.base; 153 } 154 155 static inline struct ahash_instance *ahash_instance( 156 struct crypto_instance *inst) 157 { 158 return container_of(inst, struct ahash_instance, s.base); 159 } 160 161 static inline struct ahash_instance *ahash_alg_instance( 162 struct crypto_ahash *ahash) 163 { 164 return ahash_instance(crypto_tfm_alg_instance(&ahash->base)); 165 } 166 167 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 168 { 169 return crypto_instance_ctx(ahash_crypto_instance(inst)); 170 } 171 172 static inline void ahash_request_complete(struct ahash_request *req, int err) 173 { 174 req->base.complete(&req->base, err); 175 } 176 177 static inline u32 ahash_request_flags(struct ahash_request *req) 178 { 179 return req->base.flags; 180 } 181 182 static inline struct crypto_ahash *crypto_spawn_ahash( 183 struct crypto_ahash_spawn *spawn) 184 { 185 return crypto_spawn_tfm2(&spawn->base); 186 } 187 188 static inline int ahash_enqueue_request(struct crypto_queue *queue, 189 struct ahash_request *request) 190 { 191 return crypto_enqueue_request(queue, &request->base); 192 } 193 194 static inline struct ahash_request *ahash_dequeue_request( 195 struct crypto_queue *queue) 196 { 197 return ahash_request_cast(crypto_dequeue_request(queue)); 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 &inst->s.base; 209 } 210 211 static inline struct shash_instance *shash_instance( 212 struct crypto_instance *inst) 213 { 214 return container_of(inst, struct shash_instance, s.base); 215 } 216 217 static inline struct shash_instance *shash_alg_instance( 218 struct crypto_shash *shash) 219 { 220 return shash_instance(crypto_tfm_alg_instance(&shash->base)); 221 } 222 223 static inline void *shash_instance_ctx(struct shash_instance *inst) 224 { 225 return crypto_instance_ctx(shash_crypto_instance(inst)); 226 } 227 228 static inline struct crypto_shash *crypto_spawn_shash( 229 struct crypto_shash_spawn *spawn) 230 { 231 return crypto_spawn_tfm2(&spawn->base); 232 } 233 234 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 235 { 236 return crypto_tfm_ctx_aligned(&tfm->base); 237 } 238 239 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 240 { 241 return container_of(tfm, struct crypto_shash, base); 242 } 243 244 #endif /* _CRYPTO_INTERNAL_HASH_H */ 245 246