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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
91static inline void crypto_set_skcipher_spawn(
92 struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
93{
94 crypto_set_spawn(&spawn->base, inst);
95}
96
97int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
98 u32 type, u32 mask);
99
100static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
101{
102 crypto_drop_spawn(&spawn->base);
103}
104
105static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
106 struct crypto_skcipher_spawn *spawn)
107{
108 return container_of(spawn->base.alg, struct skcipher_alg, base);
109}
110
111static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
112 struct crypto_skcipher_spawn *spawn)
113{
114 return crypto_skcipher_spawn_alg(spawn);
115}
116
117static inline struct crypto_skcipher *crypto_spawn_skcipher(
118 struct crypto_skcipher_spawn *spawn)
119{
120 return crypto_spawn_tfm2(&spawn->base);
121}
122
123static inline void crypto_skcipher_set_reqsize(
124 struct crypto_skcipher *skcipher, unsigned int reqsize)
125{
126 skcipher->reqsize = reqsize;
127}
128
129int crypto_register_skcipher(struct skcipher_alg *alg);
130void crypto_unregister_skcipher(struct skcipher_alg *alg);
131int crypto_register_skciphers(struct skcipher_alg *algs, int count);
132void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
133int skcipher_register_instance(struct crypto_template *tmpl,
134 struct skcipher_instance *inst);
135
136int skcipher_walk_done(struct skcipher_walk *walk, int err);
137int skcipher_walk_virt(struct skcipher_walk *walk,
138 struct skcipher_request *req,
139 bool atomic);
140void skcipher_walk_atomise(struct skcipher_walk *walk);
141int skcipher_walk_async(struct skcipher_walk *walk,
142 struct skcipher_request *req);
143int skcipher_walk_aead(struct skcipher_walk *walk, struct aead_request *req,
144 bool atomic);
145int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
146 struct aead_request *req, bool atomic);
147int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
148 struct aead_request *req, bool atomic);
149void skcipher_walk_complete(struct skcipher_walk *walk, int err);
150
151static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
152 int err)
153{
154 req->base.complete(&req->base, err);
155}
156
157static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
158{
159 return req->base.flags;
160}
161
162static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
163{
164 return crypto_tfm_ctx(&tfm->base);
165}
166
167static inline void *skcipher_request_ctx(struct skcipher_request *req)
168{
169 return req->__ctx;
170}
171
172static inline u32 skcipher_request_flags(struct skcipher_request *req)
173{
174 return req->base.flags;
175}
176
177static inline unsigned int crypto_skcipher_alg_min_keysize(
178 struct skcipher_alg *alg)
179{
180 if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
181 CRYPTO_ALG_TYPE_BLKCIPHER)
182 return alg->base.cra_blkcipher.min_keysize;
183
184 if (alg->base.cra_ablkcipher.encrypt)
185 return alg->base.cra_ablkcipher.min_keysize;
186
187 return alg->min_keysize;
188}
189
190static inline unsigned int crypto_skcipher_alg_max_keysize(
191 struct skcipher_alg *alg)
192{
193 if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
194 CRYPTO_ALG_TYPE_BLKCIPHER)
195 return alg->base.cra_blkcipher.max_keysize;
196
197 if (alg->base.cra_ablkcipher.encrypt)
198 return alg->base.cra_ablkcipher.max_keysize;
199
200 return alg->max_keysize;
201}
202
203static inline unsigned int crypto_skcipher_alg_chunksize(
204 struct skcipher_alg *alg)
205{
206 if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
207 CRYPTO_ALG_TYPE_BLKCIPHER)
208 return alg->base.cra_blocksize;
209
210 if (alg->base.cra_ablkcipher.encrypt)
211 return alg->base.cra_blocksize;
212
213 return alg->chunksize;
214}
215
216static inline unsigned int crypto_skcipher_alg_walksize(
217 struct skcipher_alg *alg)
218{
219 if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
220 CRYPTO_ALG_TYPE_BLKCIPHER)
221 return alg->base.cra_blocksize;
222
223 if (alg->base.cra_ablkcipher.encrypt)
224 return alg->base.cra_blocksize;
225
226 return alg->walksize;
227}
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240static inline unsigned int crypto_skcipher_chunksize(
241 struct crypto_skcipher *tfm)
242{
243 return crypto_skcipher_alg_chunksize(crypto_skcipher_alg(tfm));
244}
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257static inline unsigned int crypto_skcipher_walksize(
258 struct crypto_skcipher *tfm)
259{
260 return crypto_skcipher_alg_walksize(crypto_skcipher_alg(tfm));
261}
262
263
264struct skcipher_ctx_simple {
265 struct crypto_cipher *cipher;
266};
267static inline struct crypto_cipher *
268skcipher_cipher_simple(struct crypto_skcipher *tfm)
269{
270 struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
271
272 return ctx->cipher;
273}
274struct skcipher_instance *
275skcipher_alloc_instance_simple(struct crypto_template *tmpl, struct rtattr **tb,
276 struct crypto_alg **cipher_alg_ret);
277
278#endif
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