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1/*
2 * Symmetric key ciphers.
3 *
4 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 *
11 */
12
13#ifndef _CRYPTO_INTERNAL_SKCIPHER_H
14#define _CRYPTO_INTERNAL_SKCIPHER_H
15
16#include <crypto/algapi.h>
17#include <crypto/skcipher.h>
18#include <linux/types.h>
19
20struct rtattr;
21
22struct crypto_skcipher_spawn {
23 struct crypto_spawn base;
24};
25
26extern const struct crypto_type crypto_givcipher_type;
27
28static inline void crypto_set_skcipher_spawn(
29 struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
30{
31 crypto_set_spawn(&spawn->base, inst);
32}
33
34int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
35 u32 type, u32 mask);
36
37static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
38{
39 crypto_drop_spawn(&spawn->base);
40}
41
42static inline struct crypto_alg *crypto_skcipher_spawn_alg(
43 struct crypto_skcipher_spawn *spawn)
44{
45 return spawn->base.alg;
46}
47
48static inline struct crypto_ablkcipher *crypto_spawn_skcipher(
49 struct crypto_skcipher_spawn *spawn)
50{
51 return __crypto_ablkcipher_cast(
52 crypto_spawn_tfm(&spawn->base, crypto_skcipher_type(0),
53 crypto_skcipher_mask(0)));
54}
55
56int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req);
57int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req);
58const char *crypto_default_geniv(const struct crypto_alg *alg);
59
60struct crypto_instance *skcipher_geniv_alloc(struct crypto_template *tmpl,
61 struct rtattr **tb, u32 type,
62 u32 mask);
63void skcipher_geniv_free(struct crypto_instance *inst);
64int skcipher_geniv_init(struct crypto_tfm *tfm);
65void skcipher_geniv_exit(struct crypto_tfm *tfm);
66
67static inline struct crypto_ablkcipher *skcipher_geniv_cipher(
68 struct crypto_ablkcipher *geniv)
69{
70 return crypto_ablkcipher_crt(geniv)->base;
71}
72
73static inline int skcipher_enqueue_givcrypt(
74 struct crypto_queue *queue, struct skcipher_givcrypt_request *request)
75{
76 return ablkcipher_enqueue_request(queue, &request->creq);
77}
78
79static inline struct skcipher_givcrypt_request *skcipher_dequeue_givcrypt(
80 struct crypto_queue *queue)
81{
82 return __crypto_dequeue_request(
83 queue, offsetof(struct skcipher_givcrypt_request, creq.base));
84}
85
86static inline void *skcipher_givcrypt_reqctx(
87 struct skcipher_givcrypt_request *req)
88{
89 return ablkcipher_request_ctx(&req->creq);
90}
91
92static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
93 int err)
94{
95 req->base.complete(&req->base, err);
96}
97
98static inline void skcipher_givcrypt_complete(
99 struct skcipher_givcrypt_request *req, int err)
100{
101 ablkcipher_request_complete(&req->creq, err);
102}
103
104static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
105{
106 return req->base.flags;
107}
108
109#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */
110
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Symmetric key ciphers.
4 *
5 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
6 */
7
8#ifndef _CRYPTO_INTERNAL_SKCIPHER_H
9#define _CRYPTO_INTERNAL_SKCIPHER_H
10
11#include <crypto/algapi.h>
12#include <crypto/internal/cipher.h>
13#include <crypto/skcipher.h>
14#include <linux/list.h>
15#include <linux/types.h>
16
17struct aead_request;
18struct rtattr;
19
20struct skcipher_instance {
21 void (*free)(struct skcipher_instance *inst);
22 union {
23 struct {
24 char head[offsetof(struct skcipher_alg, base)];
25 struct crypto_instance base;
26 } s;
27 struct skcipher_alg alg;
28 };
29};
30
31struct crypto_skcipher_spawn {
32 struct crypto_spawn base;
33};
34
35struct skcipher_walk {
36 union {
37 struct {
38 struct page *page;
39 unsigned long offset;
40 } phys;
41
42 struct {
43 u8 *page;
44 void *addr;
45 } virt;
46 } src, dst;
47
48 struct scatter_walk in;
49 unsigned int nbytes;
50
51 struct scatter_walk out;
52 unsigned int total;
53
54 struct list_head buffers;
55
56 u8 *page;
57 u8 *buffer;
58 u8 *oiv;
59 void *iv;
60
61 unsigned int ivsize;
62
63 int flags;
64 unsigned int blocksize;
65 unsigned int stride;
66 unsigned int alignmask;
67};
68
69static inline struct crypto_instance *skcipher_crypto_instance(
70 struct skcipher_instance *inst)
71{
72 return &inst->s.base;
73}
74
75static inline struct skcipher_instance *skcipher_alg_instance(
76 struct crypto_skcipher *skcipher)
77{
78 return container_of(crypto_skcipher_alg(skcipher),
79 struct skcipher_instance, alg);
80}
81
82static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
83{
84 return crypto_instance_ctx(skcipher_crypto_instance(inst));
85}
86
87static inline void skcipher_request_complete(struct skcipher_request *req, int err)
88{
89 req->base.complete(&req->base, err);
90}
91
92int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
93 struct crypto_instance *inst,
94 const char *name, u32 type, u32 mask);
95
96static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
97{
98 crypto_drop_spawn(&spawn->base);
99}
100
101static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
102 struct crypto_skcipher_spawn *spawn)
103{
104 return container_of(spawn->base.alg, struct skcipher_alg, base);
105}
106
107static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
108 struct crypto_skcipher_spawn *spawn)
109{
110 return crypto_skcipher_spawn_alg(spawn);
111}
112
113static inline struct crypto_skcipher *crypto_spawn_skcipher(
114 struct crypto_skcipher_spawn *spawn)
115{
116 return crypto_spawn_tfm2(&spawn->base);
117}
118
119static inline void crypto_skcipher_set_reqsize(
120 struct crypto_skcipher *skcipher, unsigned int reqsize)
121{
122 skcipher->reqsize = reqsize;
123}
124
125int crypto_register_skcipher(struct skcipher_alg *alg);
126void crypto_unregister_skcipher(struct skcipher_alg *alg);
127int crypto_register_skciphers(struct skcipher_alg *algs, int count);
128void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
129int skcipher_register_instance(struct crypto_template *tmpl,
130 struct skcipher_instance *inst);
131
132int skcipher_walk_done(struct skcipher_walk *walk, int err);
133int skcipher_walk_virt(struct skcipher_walk *walk,
134 struct skcipher_request *req,
135 bool atomic);
136int skcipher_walk_async(struct skcipher_walk *walk,
137 struct skcipher_request *req);
138int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
139 struct aead_request *req, bool atomic);
140int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
141 struct aead_request *req, bool atomic);
142void skcipher_walk_complete(struct skcipher_walk *walk, int err);
143
144static inline void skcipher_walk_abort(struct skcipher_walk *walk)
145{
146 skcipher_walk_done(walk, -ECANCELED);
147}
148
149static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
150{
151 return crypto_tfm_ctx(&tfm->base);
152}
153
154static inline void *skcipher_request_ctx(struct skcipher_request *req)
155{
156 return req->__ctx;
157}
158
159static inline u32 skcipher_request_flags(struct skcipher_request *req)
160{
161 return req->base.flags;
162}
163
164static inline unsigned int crypto_skcipher_alg_min_keysize(
165 struct skcipher_alg *alg)
166{
167 return alg->min_keysize;
168}
169
170static inline unsigned int crypto_skcipher_alg_max_keysize(
171 struct skcipher_alg *alg)
172{
173 return alg->max_keysize;
174}
175
176static inline unsigned int crypto_skcipher_alg_walksize(
177 struct skcipher_alg *alg)
178{
179 return alg->walksize;
180}
181
182/**
183 * crypto_skcipher_walksize() - obtain walk size
184 * @tfm: cipher handle
185 *
186 * In some cases, algorithms can only perform optimally when operating on
187 * multiple blocks in parallel. This is reflected by the walksize, which
188 * must be a multiple of the chunksize (or equal if the concern does not
189 * apply)
190 *
191 * Return: walk size in bytes
192 */
193static inline unsigned int crypto_skcipher_walksize(
194 struct crypto_skcipher *tfm)
195{
196 return crypto_skcipher_alg_walksize(crypto_skcipher_alg(tfm));
197}
198
199/* Helpers for simple block cipher modes of operation */
200struct skcipher_ctx_simple {
201 struct crypto_cipher *cipher; /* underlying block cipher */
202};
203static inline struct crypto_cipher *
204skcipher_cipher_simple(struct crypto_skcipher *tfm)
205{
206 struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
207
208 return ctx->cipher;
209}
210
211struct skcipher_instance *skcipher_alloc_instance_simple(
212 struct crypto_template *tmpl, struct rtattr **tb);
213
214static inline struct crypto_alg *skcipher_ialg_simple(
215 struct skcipher_instance *inst)
216{
217 struct crypto_cipher_spawn *spawn = skcipher_instance_ctx(inst);
218
219 return crypto_spawn_cipher_alg(spawn);
220}
221
222#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */
223