aboutsummaryrefslogtreecommitdiffstats
path: root/include/crypto/hash.h
blob: d56bb71617c315e5cf13505f1ddc32c0cf698377 (plain) (blame)
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
/*
 * Hash: Hash algorithms under the crypto API
 * 
 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */

#ifndef _CRYPTO_HASH_H
#define _CRYPTO_HASH_H

#include <linux/crypto.h>

struct shash_desc {
	struct crypto_shash *tfm;
	u32 flags;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct shash_alg {
	int (*init)(struct shash_desc *desc);
	int (*reinit)(struct shash_desc *desc);
	int (*update)(struct shash_desc *desc, const u8 *data,
		      unsigned int len);
	int (*final)(struct shash_desc *desc, u8 *out);
	int (*finup)(struct shash_desc *desc, const u8 *data,
		     unsigned int len, u8 *out);
	int (*digest)(struct shash_desc *desc, const u8 *data,
		      unsigned int len, u8 *out);
	int (*setkey)(struct crypto_shash *tfm, const u8 *key,
		      unsigned int keylen);

	unsigned int descsize;
	unsigned int digestsize;

	struct crypto_alg base;
};

struct crypto_ahash {
	struct crypto_tfm base;
};

struct crypto_shash {
	struct crypto_tfm base;
};

static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
{
	return (struct crypto_ahash *)tfm;
}

static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
						      u32 type, u32 mask)
{
	type &= ~CRYPTO_ALG_TYPE_MASK;
	mask &= ~CRYPTO_ALG_TYPE_MASK;
	type |= CRYPTO_ALG_TYPE_AHASH;
	mask |= CRYPTO_ALG_TYPE_AHASH_MASK;

	return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
}

static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
{
	return &tfm->base;
}

static inline void crypto_free_ahash(struct crypto_ahash *tfm)
{
	crypto_free_tfm(crypto_ahash_tfm(tfm));
}

static inline unsigned int crypto_ahash_alignmask(
	struct crypto_ahash *tfm)
{
	return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
}

static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
{
	return &crypto_ahash_tfm(tfm)->crt_ahash;
}

static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
{
	return crypto_ahash_crt(tfm)->digestsize;
}

static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
{
	return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
}

static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
{
	crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
}

static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
{
	crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
}

static inline struct crypto_ahash *crypto_ahash_reqtfm(
	struct ahash_request *req)
{
	return __crypto_ahash_cast(req->base.tfm);
}

static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
{
	return crypto_ahash_crt(tfm)->reqsize;
}

static inline void *ahash_request_ctx(struct ahash_request *req)
{
	return req->__ctx;
}

static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
				      const u8 *key, unsigned int keylen)
{
	struct ahash_tfm *crt = crypto_ahash_crt(tfm);

	return crt->setkey(tfm, key, keylen);
}

static inline int crypto_ahash_digest(struct ahash_request *req)
{
	struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
	return crt->digest(req);
}

static inline void crypto_ahash_export(struct ahash_request *req, u8 *out)
{
	memcpy(out, ahash_request_ctx(req),
	       crypto_ahash_reqsize(crypto_ahash_reqtfm(req)));
}

int crypto_ahash_import(struct ahash_request *req, const u8 *in);

static inline int crypto_ahash_init(struct ahash_request *req)
{
	struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
	return crt->init(req);
}

static inline int crypto_ahash_update(struct ahash_request *req)
{
	struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
	return crt->update(req);
}

static inline int crypto_ahash_final(struct ahash_request *req)
{
	struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
	return crt->final(req);
}

static inline void ahash_request_set_tfm(struct ahash_request *req,
					 struct crypto_ahash *tfm)
{
	req->base.tfm = crypto_ahash_tfm(tfm);
}

static inline struct ahash_request *ahash_request_alloc(
	struct crypto_ahash *tfm, gfp_t gfp)
{
	struct ahash_request *req;

	req = kmalloc(sizeof(struct ahash_request) +
		      crypto_ahash_reqsize(tfm), gfp);

	if (likely(req))
		ahash_request_set_tfm(req, tfm);

	return req;
}

static inline void ahash_request_free(struct ahash_request *req)
{
	kfree(req);
}

static inline struct ahash_request *ahash_request_cast(
	struct crypto_async_request *req)
{
	return container_of(req, struct ahash_request, base);
}

static inline void ahash_request_set_callback(struct ahash_request *req,
					      u32 flags,
					      crypto_completion_t complete,
					      void *data)
{
	req->base.complete = complete;
	req->base.data = data;
	req->base.flags = flags;
}

static inline void ahash_request_set_crypt(struct ahash_request *req,
					   struct scatterlist *src, u8 *result,
					   unsigned int nbytes)
{
	req->src = src;
	req->nbytes = nbytes;
	req->result = result;
}

struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
					u32 mask);

static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
{
	return &tfm->base;
}

static inline void crypto_free_shash(struct crypto_shash *tfm)
{
	crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
}

static inline unsigned int crypto_shash_alignmask(
	struct crypto_shash *tfm)
{
	return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
}

static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
{
	return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
}

static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
{
	return container_of(alg, struct shash_alg, base);
}

static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
{
	return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
}

static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
{
	return crypto_shash_alg(tfm)->digestsize;
}

static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
{
	return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
}

static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
{
	crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
}

static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
{
	crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
}

static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
{
	return crypto_shash_alg(tfm)->descsize;
}

static inline void *shash_desc_ctx(struct shash_desc *desc)
{
	return desc->__ctx;
}

int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
			unsigned int keylen);
int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
			unsigned int len, u8 *out);

static inline void crypto_shash_export(struct shash_desc *desc, u8 *out)
{
	memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
}

int crypto_shash_import(struct shash_desc *desc, const u8 *in);

static inline int crypto_shash_init(struct shash_desc *desc)
{
	return crypto_shash_alg(desc->tfm)->init(desc);
}

int crypto_shash_update(struct shash_desc *desc, const u8 *data,
			unsigned int len);
int crypto_shash_final(struct shash_desc *desc, u8 *out);
int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
		       unsigned int len, u8 *out);

#endif	/* _CRYPTO_HASH_H */