summaryrefslogtreecommitdiffstats
path: root/include/crypto/internal/skcipher.h
blob: 7ae42afdcf3ed6c8d3965dd14534b7fba9e7f668 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Symmetric key ciphers.
 * 
 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
 */

#ifndef _CRYPTO_INTERNAL_SKCIPHER_H
#define _CRYPTO_INTERNAL_SKCIPHER_H

#include <crypto/algapi.h>
#include <crypto/internal/cipher.h>
#include <crypto/skcipher.h>
#include <linux/list.h>
#include <linux/types.h>

/*
 * Set this if your algorithm is sync but needs a reqsize larger
 * than MAX_SYNC_SKCIPHER_REQSIZE.
 *
 * Reuse bit that is specific to hash algorithms.
 */
#define CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE CRYPTO_ALG_OPTIONAL_KEY

struct aead_request;
struct rtattr;

struct skcipher_instance {
	void (*free)(struct skcipher_instance *inst);
	union {
		struct {
			char head[offsetof(struct skcipher_alg, base)];
			struct crypto_instance base;
		} s;
		struct skcipher_alg alg;
	};
};

struct lskcipher_instance {
	void (*free)(struct lskcipher_instance *inst);
	union {
		struct {
			char head[offsetof(struct lskcipher_alg, co.base)];
			struct crypto_instance base;
		} s;
		struct lskcipher_alg alg;
	};
};

struct crypto_skcipher_spawn {
	struct crypto_spawn base;
};

struct crypto_lskcipher_spawn {
	struct crypto_spawn base;
};

struct skcipher_walk {
	union {
		struct {
			struct page *page;
			unsigned long offset;
		} phys;

		struct {
			u8 *page;
			void *addr;
		} virt;
	} src, dst;

	struct scatter_walk in;
	unsigned int nbytes;

	struct scatter_walk out;
	unsigned int total;

	struct list_head buffers;

	u8 *page;
	u8 *buffer;
	u8 *oiv;
	void *iv;

	unsigned int ivsize;

	int flags;
	unsigned int blocksize;
	unsigned int stride;
	unsigned int alignmask;
};

static inline struct crypto_instance *skcipher_crypto_instance(
	struct skcipher_instance *inst)
{
	return &inst->s.base;
}

static inline struct crypto_instance *lskcipher_crypto_instance(
	struct lskcipher_instance *inst)
{
	return &inst->s.base;
}

static inline struct skcipher_instance *skcipher_alg_instance(
	struct crypto_skcipher *skcipher)
{
	return container_of(crypto_skcipher_alg(skcipher),
			    struct skcipher_instance, alg);
}

static inline struct lskcipher_instance *lskcipher_alg_instance(
	struct crypto_lskcipher *lskcipher)
{
	return container_of(crypto_lskcipher_alg(lskcipher),
			    struct lskcipher_instance, alg);
}

static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
{
	return crypto_instance_ctx(skcipher_crypto_instance(inst));
}

static inline void *lskcipher_instance_ctx(struct lskcipher_instance *inst)
{
	return crypto_instance_ctx(lskcipher_crypto_instance(inst));
}

static inline void skcipher_request_complete(struct skcipher_request *req, int err)
{
	crypto_request_complete(&req->base, err);
}

int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
			 struct crypto_instance *inst,
			 const char *name, u32 type, u32 mask);

int crypto_grab_lskcipher(struct crypto_lskcipher_spawn *spawn,
			  struct crypto_instance *inst,
			  const char *name, u32 type, u32 mask);

static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
{
	crypto_drop_spawn(&spawn->base);
}

static inline void crypto_drop_lskcipher(struct crypto_lskcipher_spawn *spawn)
{
	crypto_drop_spawn(&spawn->base);
}

static inline struct lskcipher_alg *crypto_lskcipher_spawn_alg(
	struct crypto_lskcipher_spawn *spawn)
{
	return container_of(spawn->base.alg, struct lskcipher_alg, co.base);
}

static inline struct skcipher_alg_common *crypto_spawn_skcipher_alg_common(
	struct crypto_skcipher_spawn *spawn)
{
	return container_of(spawn->base.alg, struct skcipher_alg_common, base);
}

static inline struct lskcipher_alg *crypto_spawn_lskcipher_alg(
	struct crypto_lskcipher_spawn *spawn)
{
	return crypto_lskcipher_spawn_alg(spawn);
}

static inline struct crypto_skcipher *crypto_spawn_skcipher(
	struct crypto_skcipher_spawn *spawn)
{
	return crypto_spawn_tfm2(&spawn->base);
}

static inline struct crypto_lskcipher *crypto_spawn_lskcipher(
	struct crypto_lskcipher_spawn *spawn)
{
	return crypto_spawn_tfm2(&spawn->base);
}

static inline void crypto_skcipher_set_reqsize(
	struct crypto_skcipher *skcipher, unsigned int reqsize)
{
	skcipher->reqsize = reqsize;
}

static inline void crypto_skcipher_set_reqsize_dma(
	struct crypto_skcipher *skcipher, unsigned int reqsize)
{
	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
	skcipher->reqsize = reqsize;
}

int crypto_register_skcipher(struct skcipher_alg *alg);
void crypto_unregister_skcipher(struct skcipher_alg *alg);
int crypto_register_skciphers(struct skcipher_alg *algs, int count);
void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
int skcipher_register_instance(struct crypto_template *tmpl,
			       struct skcipher_instance *inst);

int crypto_register_lskcipher(struct lskcipher_alg *alg);
void crypto_unregister_lskcipher(struct lskcipher_alg *alg);
int crypto_register_lskciphers(struct lskcipher_alg *algs, int count);
void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count);
int lskcipher_register_instance(struct crypto_template *tmpl,
				struct lskcipher_instance *inst);

int skcipher_walk_done(struct skcipher_walk *walk, int err);
int skcipher_walk_virt(struct skcipher_walk *walk,
		       struct skcipher_request *req,
		       bool atomic);
int skcipher_walk_async(struct skcipher_walk *walk,
			struct skcipher_request *req);
int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
			       struct aead_request *req, bool atomic);
int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
			       struct aead_request *req, bool atomic);
void skcipher_walk_complete(struct skcipher_walk *walk, int err);

static inline void skcipher_walk_abort(struct skcipher_walk *walk)
{
	skcipher_walk_done(walk, -ECANCELED);
}

static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_lskcipher_ctx(struct crypto_lskcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_skcipher_ctx_dma(struct crypto_skcipher *tfm)
{
	return crypto_tfm_ctx_dma(&tfm->base);
}

static inline void *skcipher_request_ctx(struct skcipher_request *req)
{
	return req->__ctx;
}

static inline void *skcipher_request_ctx_dma(struct skcipher_request *req)
{
	unsigned int align = crypto_dma_align();

	if (align <= crypto_tfm_ctx_alignment())
		align = 1;

	return PTR_ALIGN(skcipher_request_ctx(req), align);
}

static inline u32 skcipher_request_flags(struct skcipher_request *req)
{
	return req->base.flags;
}

/* Helpers for simple block cipher modes of operation */
struct skcipher_ctx_simple {
	struct crypto_cipher *cipher;	/* underlying block cipher */
};
static inline struct crypto_cipher *
skcipher_cipher_simple(struct crypto_skcipher *tfm)
{
	struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);

	return ctx->cipher;
}

struct skcipher_instance *skcipher_alloc_instance_simple(
	struct crypto_template *tmpl, struct rtattr **tb);

static inline struct crypto_alg *skcipher_ialg_simple(
	struct skcipher_instance *inst)
{
	struct crypto_cipher_spawn *spawn = skcipher_instance_ctx(inst);

	return crypto_spawn_cipher_alg(spawn);
}

static inline struct crypto_lskcipher *lskcipher_cipher_simple(
	struct crypto_lskcipher *tfm)
{
	struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);

	return *ctx;
}

struct lskcipher_instance *lskcipher_alloc_instance_simple(
	struct crypto_template *tmpl, struct rtattr **tb);

static inline struct lskcipher_alg *lskcipher_ialg_simple(
	struct lskcipher_instance *inst)
{
	struct crypto_lskcipher_spawn *spawn = lskcipher_instance_ctx(inst);

	return crypto_lskcipher_spawn_alg(spawn);
}

#endif	/* _CRYPTO_INTERNAL_SKCIPHER_H */