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 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 137 { 138 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 139 } 140 141 static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm) 142 { 143 return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm)); 144 } 145 146 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg) 147 { 148 return container_of(__crypto_hash_alg_common(alg), struct ahash_alg, 149 halg); 150 } 151 152 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 153 unsigned int reqsize) 154 { 155 tfm->reqsize = reqsize; 156 } 157 158 static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash, 159 unsigned int reqsize) 160 { 161 reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1); 162 ahash->reqsize = reqsize; 163 } 164 165 static inline struct crypto_instance *ahash_crypto_instance( 166 struct ahash_instance *inst) 167 { 168 return &inst->s.base; 169 } 170 171 static inline struct ahash_instance *ahash_instance( 172 struct crypto_instance *inst) 173 { 174 return container_of(inst, struct ahash_instance, s.base); 175 } 176 177 static inline struct ahash_instance *ahash_alg_instance( 178 struct crypto_ahash *ahash) 179 { 180 return ahash_instance(crypto_tfm_alg_instance(&ahash->base)); 181 } 182 183 static inline void *ahash_instance_ctx(struct ahash_instance *inst) 184 { 185 return crypto_instance_ctx(ahash_crypto_instance(inst)); 186 } 187 188 static inline void *ahash_request_ctx_dma(struct ahash_request *req) 189 { 190 unsigned int align = crypto_dma_align(); 191 192 if (align <= crypto_tfm_ctx_alignment()) 193 align = 1; 194 195 return PTR_ALIGN(ahash_request_ctx(req), align); 196 } 197 198 static inline void ahash_request_complete(struct ahash_request *req, int err) 199 { 200 crypto_request_complete(&req->base, err); 201 } 202 203 static inline u32 ahash_request_flags(struct ahash_request *req) 204 { 205 return req->base.flags; 206 } 207 208 static inline struct crypto_ahash *crypto_spawn_ahash( 209 struct crypto_ahash_spawn *spawn) 210 { 211 return crypto_spawn_tfm2(&spawn->base); 212 } 213 214 static inline int ahash_enqueue_request(struct crypto_queue *queue, 215 struct ahash_request *request) 216 { 217 return crypto_enqueue_request(queue, &request->base); 218 } 219 220 static inline struct ahash_request *ahash_dequeue_request( 221 struct crypto_queue *queue) 222 { 223 return ahash_request_cast(crypto_dequeue_request(queue)); 224 } 225 226 static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 227 { 228 return crypto_tfm_ctx(&tfm->base); 229 } 230 231 static inline struct crypto_instance *shash_crypto_instance( 232 struct shash_instance *inst) 233 { 234 return &inst->s.base; 235 } 236 237 static inline struct shash_instance *shash_instance( 238 struct crypto_instance *inst) 239 { 240 return container_of(inst, struct shash_instance, s.base); 241 } 242 243 static inline struct shash_instance *shash_alg_instance( 244 struct crypto_shash *shash) 245 { 246 return shash_instance(crypto_tfm_alg_instance(&shash->base)); 247 } 248 249 static inline void *shash_instance_ctx(struct shash_instance *inst) 250 { 251 return crypto_instance_ctx(shash_crypto_instance(inst)); 252 } 253 254 static inline struct crypto_shash *crypto_spawn_shash( 255 struct crypto_shash_spawn *spawn) 256 { 257 return crypto_spawn_tfm2(&spawn->base); 258 } 259 260 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm) 261 { 262 return crypto_tfm_ctx_aligned(&tfm->base); 263 } 264 265 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm) 266 { 267 return container_of(tfm, struct crypto_shash, base); 268 } 269 270 #endif /* _CRYPTO_INTERNAL_HASH_H */ 271 272