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 flags; 22 23 struct page *pg; 24 unsigned int entrylen; 25 26 unsigned int total; 27 struct scatterlist *sg; 28 }; 29 30 struct ahash_instance { 31 void (*free)(struct ahash_instance *inst); 32 union { 33 struct { 34 char head[offsetof(struct ahash_alg, halg.base)]; 35 struct crypto_instance base; 36 } s; 37 struct ahash_alg alg; 38 }; 39 }; 40 41 struct shash_instance { 42 void (*free)(struct shash_instance *inst); 43 union { 44 struct { 45 char head[offsetof(struct shash_alg, base)]; 46 struct crypto_instance base; 47 } s; 48 struct shash_alg alg; 49 }; 50 }; 51 52 struct crypto_ahash_spawn { 53 struct crypto_spawn base; 54 }; 55 56 struct crypto_shash_spawn { 57 struct crypto_spawn base; 58 }; 59 60 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err); 61 int crypto_hash_walk_first(struct ahash_request *req, 62 struct crypto_hash_walk *walk); 63 64 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 65 { 66 return !(walk->entrylen | walk->total); 67 } 68 69 int crypto_register_ahash(struct ahash_alg *alg); 70 void crypto_unregister_ahash(struct ahash_alg *alg); 71 int crypto_register_ahashes(struct ahash_alg *algs, int count); 72 void crypto_unregister_ahashes(struct ahash_alg *algs, int count); 73 int ahash_register_instance(struct crypto_template *tmpl, 74 struct ahash_instance *inst); 75 76 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, 77 unsigned int keylen); 78 79 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg) 80 { 81 return alg->setkey != shash_no_setkey; 82 } 83 84 static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg) 85 { 86 return crypto_shash_alg_has_setkey(alg) && 87 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY); 88 } 89 90 int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, 91 struct crypto_instance *inst, 92 const char *name, u32 type, u32 mask); 93 94 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 95 { 96 crypto_drop_spawn(&spawn->base); 97 } 98 99 static inline struct hash_alg_common *crypto_spawn_ahash_alg( 100 struct crypto_ahash_spawn *spawn) 101 { 102 return __crypto_hash_alg_common(spawn->base.alg); 103 } 104 105 int crypto_register_shash(struct shash_alg *alg); 106 void crypto_unregister_shash(struct shash_alg *alg); 107 int crypto_register_shashes(struct shash_alg *algs, int count); 108 void crypto_unregister_shashes(struct shash_alg *algs, int count); 109 int shash_register_instance(struct crypto_template *tmpl, 110 struct shash_instance *inst); 111 void shash_free_singlespawn_instance(struct shash_instance *inst); 112 113 int crypto_grab_shash(struct crypto_shash_spawn *spawn, 114 struct crypto_instance *inst, 115 const char *name, u32 type, u32 mask); 116 117 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 118 { 119 crypto_drop_spawn(&spawn->base); 120 } 121 122 static inline struct shash_alg *crypto_spawn_shash_alg( 123 struct crypto_shash_spawn *spawn) 124 { 125 return __crypto_shash_alg(spawn->base.alg); 126 } 127 128 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 129 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 130 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 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 void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm) 138 { 139 return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm)); 140 } 141 142 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 143 { 144 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 145 halg); 146 } 147 148 static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash) 149 { 150 return container_of(crypto_hash_alg_common(hash), struct ahash_alg, 151 halg); 152 } 153 154 static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm, 155 unsigned int size) 156 { 157 tfm->statesize = size; 158 } 159 160 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 161 unsigned int reqsize) 162 { 163 tfm->reqsize = reqsize; 164 } 165 166 static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash, 167 unsigned int reqsize) 168 { 169 reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1); 170 ahash->reqsize = reqsize; 171 } 172 173 static inline struct crypto_instance *ahash_crypto_instance( 174 struct ahash_instance *inst) 175 { 176 return &inst->s.base; 177 } 178 179 static inline struct ahash_instance *ahash_instance( 180 struct crypto_instance *inst) 181 { 182 return container_of(inst, struct ahash_instance, s.base); 183 } 184 185 static inline struct ahash_instance *ahash_alg_instance( 186 struct crypto_ahash *ahash) 187 { 188 return ahash_instance(crypto_tfm_alg_instance(&ahash->base)); 189 } 190 191 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 192 { 193 return crypto_instance_ctx(ahash_crypto_instance(inst)); 194 } 195 196 static inline void *ahash_request_ctx_dma(struct ahash_request *req) 197 { 198 unsigned int align = crypto_dma_align(); 199 200 if (align <= crypto_tfm_ctx_alignment()) 201 align = 1; 202 203 return PTR_ALIGN(ahash_request_ctx(req), align); 204 } 205 206 static inline void ahash_request_complete(struct ahash_request *req, int err) 207 { 208 crypto_request_complete(&req->base, err); 209 } 210 211 static inline u32 ahash_request_flags(struct ahash_request *req) 212 { 213 return req->base.flags; 214 } 215 216 static inline struct crypto_ahash *crypto_spawn_ahash( 217 struct crypto_ahash_spawn *spawn) 218 { 219 return crypto_spawn_tfm2(&spawn->base); 220 } 221 222 static inline int ahash_enqueue_request(struct crypto_queue *queue, 223 struct ahash_request *request) 224 { 225 return crypto_enqueue_request(queue, &request->base); 226 } 227 228 static inline struct ahash_request *ahash_dequeue_request( 229 struct crypto_queue *queue) 230 { 231 return ahash_request_cast(crypto_dequeue_request(queue)); 232 } 233 234 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 235 { 236 return crypto_tfm_ctx(&tfm->base); 237 } 238 239 static inline struct crypto_instance *shash_crypto_instance( 240 struct shash_instance *inst) 241 { 242 return &inst->s.base; 243 } 244 245 static inline struct shash_instance *shash_instance( 246 struct crypto_instance *inst) 247 { 248 return container_of(inst, struct shash_instance, s.base); 249 } 250 251 static inline struct shash_instance *shash_alg_instance( 252 struct crypto_shash *shash) 253 { 254 return shash_instance(crypto_tfm_alg_instance(&shash->base)); 255 } 256 257 static inline void *shash_instance_ctx(struct shash_instance *inst) 258 { 259 return crypto_instance_ctx(shash_crypto_instance(inst)); 260 } 261 262 static inline struct crypto_shash *crypto_spawn_shash( 263 struct crypto_shash_spawn *spawn) 264 { 265 return crypto_spawn_tfm2(&spawn->base); 266 } 267 268 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 269 { 270 return container_of(tfm, struct crypto_shash, base); 271 } 272 273 #endif /* _CRYPTO_INTERNAL_HASH_H */ 274 275