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 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, 79 unsigned int keylen); 80 81 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg) 82 { 83 return alg->setkey != shash_no_setkey; 84 } 85 86 static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg) 87 { 88 return crypto_shash_alg_has_setkey(alg) && 89 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY); 90 } 91 92 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg); 93 94 int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, 95 struct crypto_instance *inst, 96 const char *name, u32 type, u32 mask); 97 98 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 99 { 100 crypto_drop_spawn(&spawn->base); 101 } 102 103 static inline struct hash_alg_common *crypto_spawn_ahash_alg( 104 struct crypto_ahash_spawn *spawn) 105 { 106 return __crypto_hash_alg_common(spawn->base.alg); 107 } 108 109 int crypto_register_shash(struct shash_alg *alg); 110 void crypto_unregister_shash(struct shash_alg *alg); 111 int crypto_register_shashes(struct shash_alg *algs, int count); 112 void crypto_unregister_shashes(struct shash_alg *algs, int count); 113 int shash_register_instance(struct crypto_template *tmpl, 114 struct shash_instance *inst); 115 void shash_free_singlespawn_instance(struct shash_instance *inst); 116 117 int crypto_grab_shash(struct crypto_shash_spawn *spawn, 118 struct crypto_instance *inst, 119 const char *name, u32 type, u32 mask); 120 121 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 122 { 123 crypto_drop_spawn(&spawn->base); 124 } 125 126 static inline struct shash_alg *crypto_spawn_shash_alg( 127 struct crypto_shash_spawn *spawn) 128 { 129 return __crypto_shash_alg(spawn->base.alg); 130 } 131 132 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 133 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 134 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 135 136 int crypto_init_shash_ops_async(struct crypto_tfm *tfm); 137 138 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 139 { 140 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 141 } 142 143 static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm) 144 { 145 return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm)); 146 } 147 148 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 149 { 150 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 151 halg); 152 } 153 154 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 155 unsigned int reqsize) 156 { 157 tfm->reqsize = reqsize; 158 } 159 160 static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash, 161 unsigned int reqsize) 162 { 163 reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1); 164 ahash->reqsize = reqsize; 165 } 166 167 static inline struct crypto_instance *ahash_crypto_instance( 168 struct ahash_instance *inst) 169 { 170 return &inst->s.base; 171 } 172 173 static inline struct ahash_instance *ahash_instance( 174 struct crypto_instance *inst) 175 { 176 return container_of(inst, struct ahash_instance, s.base); 177 } 178 179 static inline struct ahash_instance *ahash_alg_instance( 180 struct crypto_ahash *ahash) 181 { 182 return ahash_instance(crypto_tfm_alg_instance(&ahash->base)); 183 } 184 185 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 186 { 187 return crypto_instance_ctx(ahash_crypto_instance(inst)); 188 } 189 190 static inline void *ahash_request_ctx_dma(struct ahash_request *req) 191 { 192 unsigned int align = crypto_dma_align(); 193 194 if (align <= crypto_tfm_ctx_alignment()) 195 align = 1; 196 197 return PTR_ALIGN(ahash_request_ctx(req), align); 198 } 199 200 static inline void ahash_request_complete(struct ahash_request *req, int err) 201 { 202 req->base.complete(&req->base, err); 203 } 204 205 static inline u32 ahash_request_flags(struct ahash_request *req) 206 { 207 return req->base.flags; 208 } 209 210 static inline struct crypto_ahash *crypto_spawn_ahash( 211 struct crypto_ahash_spawn *spawn) 212 { 213 return crypto_spawn_tfm2(&spawn->base); 214 } 215 216 static inline int ahash_enqueue_request(struct crypto_queue *queue, 217 struct ahash_request *request) 218 { 219 return crypto_enqueue_request(queue, &request->base); 220 } 221 222 static inline struct ahash_request *ahash_dequeue_request( 223 struct crypto_queue *queue) 224 { 225 return ahash_request_cast(crypto_dequeue_request(queue)); 226 } 227 228 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 229 { 230 return crypto_tfm_ctx(&tfm->base); 231 } 232 233 static inline struct crypto_instance *shash_crypto_instance( 234 struct shash_instance *inst) 235 { 236 return &inst->s.base; 237 } 238 239 static inline struct shash_instance *shash_instance( 240 struct crypto_instance *inst) 241 { 242 return container_of(inst, struct shash_instance, s.base); 243 } 244 245 static inline struct shash_instance *shash_alg_instance( 246 struct crypto_shash *shash) 247 { 248 return shash_instance(crypto_tfm_alg_instance(&shash->base)); 249 } 250 251 static inline void *shash_instance_ctx(struct shash_instance *inst) 252 { 253 return crypto_instance_ctx(shash_crypto_instance(inst)); 254 } 255 256 static inline struct crypto_shash *crypto_spawn_shash( 257 struct crypto_shash_spawn *spawn) 258 { 259 return crypto_spawn_tfm2(&spawn->base); 260 } 261 262 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 263 { 264 return crypto_tfm_ctx_aligned(&tfm->base); 265 } 266 267 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 268 { 269 return container_of(tfm, struct crypto_shash, base); 270 } 271 272 #endif /* _CRYPTO_INTERNAL_HASH_H */ 273 274