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 14struct ahash_request; 15struct scatterlist; 16 17struct 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 30struct 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 41struct 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 52struct crypto_ahash_spawn { 53 struct crypto_spawn base; 54}; 55 56struct crypto_shash_spawn { 57 struct crypto_spawn base; 58}; 59 60int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err); 61int crypto_hash_walk_first(struct ahash_request *req, 62 struct crypto_hash_walk *walk); 63 64static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk) 65{ 66 return !(walk->entrylen | walk->total); 67} 68 69int crypto_register_ahash(struct ahash_alg *alg); 70void crypto_unregister_ahash(struct ahash_alg *alg); 71int crypto_register_ahashes(struct ahash_alg *algs, int count); 72void crypto_unregister_ahashes(struct ahash_alg *algs, int count); 73int ahash_register_instance(struct crypto_template *tmpl, 74 struct ahash_instance *inst); 75 76int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, 77 unsigned int keylen); 78 79static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg) 80{ 81 return alg->setkey != shash_no_setkey; 82} 83 84static 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 90int crypto_grab_ahash(struct crypto_ahash_spawn *spawn, 91 struct crypto_instance *inst, 92 const char *name, u32 type, u32 mask); 93 94static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn) 95{ 96 crypto_drop_spawn(&spawn->base); 97} 98 99static 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 105int crypto_register_shash(struct shash_alg *alg); 106void crypto_unregister_shash(struct shash_alg *alg); 107int crypto_register_shashes(struct shash_alg *algs, int count); 108void crypto_unregister_shashes(struct shash_alg *algs, int count); 109int shash_register_instance(struct crypto_template *tmpl, 110 struct shash_instance *inst); 111void shash_free_singlespawn_instance(struct shash_instance *inst); 112 113int crypto_grab_shash(struct crypto_shash_spawn *spawn, 114 struct crypto_instance *inst, 115 const char *name, u32 type, u32 mask); 116 117static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn) 118{ 119 crypto_drop_spawn(&spawn->base); 120} 121 122static 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 128int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc); 129int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc); 130int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc); 131 132static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm) 133{ 134 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 135} 136 137static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm) 138{ 139 return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm)); 140} 141 142static 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 148static 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 154static inline void crypto_ahash_set_statesize(struct crypto_ahash *tfm, 155 unsigned int size) 156{ 157 tfm->statesize = size; 158} 159 160static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm, 161 unsigned int reqsize) 162{ 163 tfm->reqsize = reqsize; 164} 165 166static 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 173static inline struct crypto_instance *ahash_crypto_instance( 174 struct ahash_instance *inst) 175{ 176 return &inst->s.base; 177} 178 179static inline struct ahash_instance *ahash_instance( 180 struct crypto_instance *inst) 181{ 182 return container_of(inst, struct ahash_instance, s.base); 183} 184 185static 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 191static inline void *ahash_instance_ctx(struct ahash_instance *inst) 192{ 193 return crypto_instance_ctx(ahash_crypto_instance(inst)); 194} 195 196static 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 206static inline void ahash_request_complete(struct ahash_request *req, int err) 207{ 208 crypto_request_complete(&req->base, err); 209} 210 211static inline u32 ahash_request_flags(struct ahash_request *req) 212{ 213 return req->base.flags; 214} 215 216static inline struct crypto_ahash *crypto_spawn_ahash( 217 struct crypto_ahash_spawn *spawn) 218{ 219 return crypto_spawn_tfm2(&spawn->base); 220} 221 222static 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 228static inline struct ahash_request *ahash_dequeue_request( 229 struct crypto_queue *queue) 230{ 231 return ahash_request_cast(crypto_dequeue_request(queue)); 232} 233 234static inline void *crypto_shash_ctx(struct crypto_shash *tfm) 235{ 236 return crypto_tfm_ctx(&tfm->base); 237} 238 239static inline struct crypto_instance *shash_crypto_instance( 240 struct shash_instance *inst) 241{ 242 return &inst->s.base; 243} 244 245static inline struct shash_instance *shash_instance( 246 struct crypto_instance *inst) 247{ 248 return container_of(inst, struct shash_instance, s.base); 249} 250 251static 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 257static inline void *shash_instance_ctx(struct shash_instance *inst) 258{ 259 return crypto_instance_ctx(shash_crypto_instance(inst)); 260} 261 262static inline struct crypto_shash *crypto_spawn_shash( 263 struct crypto_shash_spawn *spawn) 264{ 265 return crypto_spawn_tfm2(&spawn->base); 266} 267 268static 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