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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/skcipher.h>
13#include <linux/list.h>
14#include <linux/types.h>
15
16struct aead_request;
17struct rtattr;
18
19struct skcipher_instance {
20 void (*free)(struct skcipher_instance *inst);
21 union {
22 struct {
23 char head[offsetof(struct skcipher_alg, base)];
24 struct crypto_instance base;
25 } s;
26 struct skcipher_alg alg;
27 };
28};
29
30struct crypto_skcipher_spawn {
31 struct crypto_spawn base;
32};
33
34struct skcipher_walk {
35 union {
36 struct {
37 struct page *page;
38 unsigned long offset;
39 } phys;
40
41 struct {
42 u8 *page;
43 void *addr;
44 } virt;
45 } src, dst;
46
47 struct scatter_walk in;
48 unsigned int nbytes;
49
50 struct scatter_walk out;
51 unsigned int total;
52
53 struct list_head buffers;
54
55 u8 *page;
56 u8 *buffer;
57 u8 *oiv;
58 void *iv;
59
60 unsigned int ivsize;
61
62 int flags;
63 unsigned int blocksize;
64 unsigned int stride;
65 unsigned int alignmask;
66};
67
68static inline struct crypto_instance *skcipher_crypto_instance(
69 struct skcipher_instance *inst)
70{
71 return &inst->s.base;
72}
73
74static inline struct skcipher_instance *skcipher_alg_instance(
75 struct crypto_skcipher *skcipher)
76{
77 return container_of(crypto_skcipher_alg(skcipher),
78 struct skcipher_instance, alg);
79}
80
81static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
82{
83 return crypto_instance_ctx(skcipher_crypto_instance(inst));
84}
85
86static inline void skcipher_request_complete(struct skcipher_request *req, int err)
87{
88 req->base.complete(&req->base, err);
89}
90
91int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
92 struct crypto_instance *inst,
93 const char *name, u32 type, u32 mask);
94
95static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
96{
97 crypto_drop_spawn(&spawn->base);
98}
99
100static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
101 struct crypto_skcipher_spawn *spawn)
102{
103 return container_of(spawn->base.alg, struct skcipher_alg, base);
104}
105
106static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
107 struct crypto_skcipher_spawn *spawn)
108{
109 return crypto_skcipher_spawn_alg(spawn);
110}
111
112static inline struct crypto_skcipher *crypto_spawn_skcipher(
113 struct crypto_skcipher_spawn *spawn)
114{
115 return crypto_spawn_tfm2(&spawn->base);
116}
117
118static inline void crypto_skcipher_set_reqsize(
119 struct crypto_skcipher *skcipher, unsigned int reqsize)
120{
121 skcipher->reqsize = reqsize;
122}
123
124int crypto_register_skcipher(struct skcipher_alg *alg);
125void crypto_unregister_skcipher(struct skcipher_alg *alg);
126int crypto_register_skciphers(struct skcipher_alg *algs, int count);
127void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
128int skcipher_register_instance(struct crypto_template *tmpl,
129 struct skcipher_instance *inst);
130
131int skcipher_walk_done(struct skcipher_walk *walk, int err);
132int skcipher_walk_virt(struct skcipher_walk *walk,
133 struct skcipher_request *req,
134 bool atomic);
135void skcipher_walk_atomise(struct skcipher_walk *walk);
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