1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Symmetric key ciphers.
5 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
8 #ifndef _CRYPTO_INTERNAL_SKCIPHER_H
9 #define _CRYPTO_INTERNAL_SKCIPHER_H
11 #include <crypto/algapi.h>
12 #include <crypto/skcipher.h>
13 #include <linux/list.h>
14 #include <linux/types.h>
19 struct skcipher_instance {
20 void (*free)(struct skcipher_instance *inst);
23 char head[offsetof(struct skcipher_alg, base)];
24 struct crypto_instance base;
26 struct skcipher_alg alg;
30 struct crypto_skcipher_spawn {
31 struct crypto_spawn base;
34 struct skcipher_walk {
47 struct scatter_walk in;
50 struct scatter_walk out;
53 struct list_head buffers;
63 unsigned int blocksize;
65 unsigned int alignmask;
68 static inline struct crypto_instance *skcipher_crypto_instance(
69 struct skcipher_instance *inst)
74 static inline struct skcipher_instance *skcipher_alg_instance(
75 struct crypto_skcipher *skcipher)
77 return container_of(crypto_skcipher_alg(skcipher),
78 struct skcipher_instance, alg);
81 static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
83 return crypto_instance_ctx(skcipher_crypto_instance(inst));
86 static inline void skcipher_request_complete(struct skcipher_request *req, int err)
88 req->base.complete(&req->base, err);
91 static inline void crypto_set_skcipher_spawn(
92 struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
94 crypto_set_spawn(&spawn->base, inst);
97 int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
100 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
102 crypto_drop_spawn(&spawn->base);
105 static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
106 struct crypto_skcipher_spawn *spawn)
108 return container_of(spawn->base.alg, struct skcipher_alg, base);
111 static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
112 struct crypto_skcipher_spawn *spawn)
114 return crypto_skcipher_spawn_alg(spawn);
117 static inline struct crypto_skcipher *crypto_spawn_skcipher(
118 struct crypto_skcipher_spawn *spawn)
120 return crypto_spawn_tfm2(&spawn->base);
123 static inline void crypto_skcipher_set_reqsize(
124 struct crypto_skcipher *skcipher, unsigned int reqsize)
126 skcipher->reqsize = reqsize;
129 int crypto_register_skcipher(struct skcipher_alg *alg);
130 void crypto_unregister_skcipher(struct skcipher_alg *alg);
131 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
132 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
133 int skcipher_register_instance(struct crypto_template *tmpl,
134 struct skcipher_instance *inst);
136 int skcipher_walk_done(struct skcipher_walk *walk, int err);
137 int skcipher_walk_virt(struct skcipher_walk *walk,
138 struct skcipher_request *req,
140 void skcipher_walk_atomise(struct skcipher_walk *walk);
141 int skcipher_walk_async(struct skcipher_walk *walk,
142 struct skcipher_request *req);
143 int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
144 struct aead_request *req, bool atomic);
145 int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
146 struct aead_request *req, bool atomic);
147 void skcipher_walk_complete(struct skcipher_walk *walk, int err);
149 static inline void skcipher_walk_abort(struct skcipher_walk *walk)
151 skcipher_walk_done(walk, -ECANCELED);
154 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
156 return crypto_tfm_ctx(&tfm->base);
159 static inline void *skcipher_request_ctx(struct skcipher_request *req)
164 static inline u32 skcipher_request_flags(struct skcipher_request *req)
166 return req->base.flags;
169 static inline unsigned int crypto_skcipher_alg_min_keysize(
170 struct skcipher_alg *alg)
172 return alg->min_keysize;
175 static inline unsigned int crypto_skcipher_alg_max_keysize(
176 struct skcipher_alg *alg)
178 return alg->max_keysize;
181 static inline unsigned int crypto_skcipher_alg_walksize(
182 struct skcipher_alg *alg)
184 return alg->walksize;
188 * crypto_skcipher_walksize() - obtain walk size
189 * @tfm: cipher handle
191 * In some cases, algorithms can only perform optimally when operating on
192 * multiple blocks in parallel. This is reflected by the walksize, which
193 * must be a multiple of the chunksize (or equal if the concern does not
196 * Return: walk size in bytes
198 static inline unsigned int crypto_skcipher_walksize(
199 struct crypto_skcipher *tfm)
201 return crypto_skcipher_alg_walksize(crypto_skcipher_alg(tfm));
204 /* Helpers for simple block cipher modes of operation */
205 struct skcipher_ctx_simple {
206 struct crypto_cipher *cipher; /* underlying block cipher */
208 static inline struct crypto_cipher *
209 skcipher_cipher_simple(struct crypto_skcipher *tfm)
211 struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
216 struct skcipher_instance *skcipher_alloc_instance_simple(
217 struct crypto_template *tmpl, struct rtattr **tb);
219 static inline struct crypto_alg *skcipher_ialg_simple(
220 struct skcipher_instance *inst)
222 struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
227 #endif /* _CRYPTO_INTERNAL_SKCIPHER_H */