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18e33e6d HX |
1 | /* |
2 | * Hash: Hash algorithms under the crypto API | |
3 | * | |
4 | * Copyright (c) 2008 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_HASH_H | |
14 | #define _CRYPTO_HASH_H | |
15 | ||
16 | #include <linux/crypto.h> | |
17 | ||
88056ec3 HX |
18 | struct crypto_ahash; |
19 | ||
20 | struct hash_alg_common { | |
21 | unsigned int digestsize; | |
22 | unsigned int statesize; | |
23 | ||
24 | struct crypto_alg base; | |
25 | }; | |
26 | ||
27 | struct ahash_request { | |
28 | struct crypto_async_request base; | |
29 | ||
30 | unsigned int nbytes; | |
31 | struct scatterlist *src; | |
32 | u8 *result; | |
33 | ||
66f6ce5e HX |
34 | /* This field may only be used by the ahash API code. */ |
35 | void *priv; | |
36 | ||
88056ec3 HX |
37 | void *__ctx[] CRYPTO_MINALIGN_ATTR; |
38 | }; | |
39 | ||
40 | struct ahash_alg { | |
41 | int (*init)(struct ahash_request *req); | |
42 | int (*update)(struct ahash_request *req); | |
43 | int (*final)(struct ahash_request *req); | |
44 | int (*finup)(struct ahash_request *req); | |
45 | int (*digest)(struct ahash_request *req); | |
46 | int (*export)(struct ahash_request *req, void *out); | |
47 | int (*import)(struct ahash_request *req, const void *in); | |
48 | int (*setkey)(struct crypto_ahash *tfm, const u8 *key, | |
49 | unsigned int keylen); | |
50 | ||
51 | struct hash_alg_common halg; | |
52 | }; | |
53 | ||
7b5a080b HX |
54 | struct shash_desc { |
55 | struct crypto_shash *tfm; | |
56 | u32 flags; | |
57 | ||
58 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
59 | }; | |
60 | ||
a0a77af1 BW |
61 | #define SHASH_DESC_ON_STACK(shash, ctx) \ |
62 | char __##shash##_desc[sizeof(struct shash_desc) + \ | |
63 | crypto_shash_descsize(ctx)] CRYPTO_MINALIGN_ATTR; \ | |
64 | struct shash_desc *shash = (struct shash_desc *)__##shash##_desc | |
65 | ||
7b5a080b HX |
66 | struct shash_alg { |
67 | int (*init)(struct shash_desc *desc); | |
68 | int (*update)(struct shash_desc *desc, const u8 *data, | |
69 | unsigned int len); | |
70 | int (*final)(struct shash_desc *desc, u8 *out); | |
71 | int (*finup)(struct shash_desc *desc, const u8 *data, | |
72 | unsigned int len, u8 *out); | |
73 | int (*digest)(struct shash_desc *desc, const u8 *data, | |
74 | unsigned int len, u8 *out); | |
99d27e1c HX |
75 | int (*export)(struct shash_desc *desc, void *out); |
76 | int (*import)(struct shash_desc *desc, const void *in); | |
7b5a080b HX |
77 | int (*setkey)(struct crypto_shash *tfm, const u8 *key, |
78 | unsigned int keylen); | |
79 | ||
80 | unsigned int descsize; | |
88056ec3 HX |
81 | |
82 | /* These fields must match hash_alg_common. */ | |
fa649664 HX |
83 | unsigned int digestsize |
84 | __attribute__ ((aligned(__alignof__(struct hash_alg_common)))); | |
99d27e1c | 85 | unsigned int statesize; |
7b5a080b HX |
86 | |
87 | struct crypto_alg base; | |
88 | }; | |
89 | ||
18e33e6d | 90 | struct crypto_ahash { |
88056ec3 HX |
91 | int (*init)(struct ahash_request *req); |
92 | int (*update)(struct ahash_request *req); | |
93 | int (*final)(struct ahash_request *req); | |
94 | int (*finup)(struct ahash_request *req); | |
95 | int (*digest)(struct ahash_request *req); | |
96 | int (*export)(struct ahash_request *req, void *out); | |
97 | int (*import)(struct ahash_request *req, const void *in); | |
98 | int (*setkey)(struct crypto_ahash *tfm, const u8 *key, | |
99 | unsigned int keylen); | |
100 | ||
88056ec3 | 101 | unsigned int reqsize; |
18e33e6d HX |
102 | struct crypto_tfm base; |
103 | }; | |
104 | ||
7b5a080b | 105 | struct crypto_shash { |
113adefc | 106 | unsigned int descsize; |
7b5a080b HX |
107 | struct crypto_tfm base; |
108 | }; | |
109 | ||
18e33e6d HX |
110 | static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm) |
111 | { | |
88056ec3 | 112 | return container_of(tfm, struct crypto_ahash, base); |
18e33e6d HX |
113 | } |
114 | ||
88056ec3 HX |
115 | struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, |
116 | u32 mask); | |
18e33e6d HX |
117 | |
118 | static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm) | |
119 | { | |
120 | return &tfm->base; | |
121 | } | |
122 | ||
123 | static inline void crypto_free_ahash(struct crypto_ahash *tfm) | |
124 | { | |
88056ec3 | 125 | crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm)); |
18e33e6d HX |
126 | } |
127 | ||
128 | static inline unsigned int crypto_ahash_alignmask( | |
129 | struct crypto_ahash *tfm) | |
130 | { | |
131 | return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm)); | |
132 | } | |
133 | ||
88056ec3 HX |
134 | static inline struct hash_alg_common *__crypto_hash_alg_common( |
135 | struct crypto_alg *alg) | |
136 | { | |
137 | return container_of(alg, struct hash_alg_common, base); | |
138 | } | |
139 | ||
140 | static inline struct hash_alg_common *crypto_hash_alg_common( | |
141 | struct crypto_ahash *tfm) | |
18e33e6d | 142 | { |
88056ec3 | 143 | return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg); |
18e33e6d HX |
144 | } |
145 | ||
146 | static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm) | |
147 | { | |
500b3e3c | 148 | return crypto_hash_alg_common(tfm)->digestsize; |
88056ec3 HX |
149 | } |
150 | ||
151 | static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm) | |
152 | { | |
153 | return crypto_hash_alg_common(tfm)->statesize; | |
18e33e6d HX |
154 | } |
155 | ||
156 | static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm) | |
157 | { | |
158 | return crypto_tfm_get_flags(crypto_ahash_tfm(tfm)); | |
159 | } | |
160 | ||
161 | static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags) | |
162 | { | |
163 | crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags); | |
164 | } | |
165 | ||
166 | static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags) | |
167 | { | |
168 | crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags); | |
169 | } | |
170 | ||
171 | static inline struct crypto_ahash *crypto_ahash_reqtfm( | |
172 | struct ahash_request *req) | |
173 | { | |
174 | return __crypto_ahash_cast(req->base.tfm); | |
175 | } | |
176 | ||
177 | static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm) | |
178 | { | |
88056ec3 | 179 | return tfm->reqsize; |
18e33e6d HX |
180 | } |
181 | ||
dec8b786 HX |
182 | static inline void *ahash_request_ctx(struct ahash_request *req) |
183 | { | |
184 | return req->__ctx; | |
185 | } | |
186 | ||
66f6ce5e HX |
187 | int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, |
188 | unsigned int keylen); | |
189 | int crypto_ahash_finup(struct ahash_request *req); | |
190 | int crypto_ahash_final(struct ahash_request *req); | |
191 | int crypto_ahash_digest(struct ahash_request *req); | |
18e33e6d | 192 | |
88056ec3 | 193 | static inline int crypto_ahash_export(struct ahash_request *req, void *out) |
dec8b786 | 194 | { |
88056ec3 | 195 | return crypto_ahash_reqtfm(req)->export(req, out); |
dec8b786 HX |
196 | } |
197 | ||
88056ec3 HX |
198 | static inline int crypto_ahash_import(struct ahash_request *req, const void *in) |
199 | { | |
200 | return crypto_ahash_reqtfm(req)->import(req, in); | |
201 | } | |
dec8b786 | 202 | |
318e5313 HX |
203 | static inline int crypto_ahash_init(struct ahash_request *req) |
204 | { | |
88056ec3 | 205 | return crypto_ahash_reqtfm(req)->init(req); |
318e5313 HX |
206 | } |
207 | ||
208 | static inline int crypto_ahash_update(struct ahash_request *req) | |
209 | { | |
88056ec3 | 210 | return crypto_ahash_reqtfm(req)->update(req); |
318e5313 HX |
211 | } |
212 | ||
18e33e6d HX |
213 | static inline void ahash_request_set_tfm(struct ahash_request *req, |
214 | struct crypto_ahash *tfm) | |
215 | { | |
216 | req->base.tfm = crypto_ahash_tfm(tfm); | |
217 | } | |
218 | ||
219 | static inline struct ahash_request *ahash_request_alloc( | |
220 | struct crypto_ahash *tfm, gfp_t gfp) | |
221 | { | |
222 | struct ahash_request *req; | |
223 | ||
224 | req = kmalloc(sizeof(struct ahash_request) + | |
225 | crypto_ahash_reqsize(tfm), gfp); | |
226 | ||
227 | if (likely(req)) | |
228 | ahash_request_set_tfm(req, tfm); | |
229 | ||
230 | return req; | |
231 | } | |
232 | ||
233 | static inline void ahash_request_free(struct ahash_request *req) | |
234 | { | |
aef73cfc | 235 | kzfree(req); |
18e33e6d HX |
236 | } |
237 | ||
238 | static inline struct ahash_request *ahash_request_cast( | |
239 | struct crypto_async_request *req) | |
240 | { | |
241 | return container_of(req, struct ahash_request, base); | |
242 | } | |
243 | ||
244 | static inline void ahash_request_set_callback(struct ahash_request *req, | |
245 | u32 flags, | |
3e3dc25f | 246 | crypto_completion_t compl, |
18e33e6d HX |
247 | void *data) |
248 | { | |
3e3dc25f | 249 | req->base.complete = compl; |
18e33e6d HX |
250 | req->base.data = data; |
251 | req->base.flags = flags; | |
252 | } | |
253 | ||
254 | static inline void ahash_request_set_crypt(struct ahash_request *req, | |
255 | struct scatterlist *src, u8 *result, | |
256 | unsigned int nbytes) | |
257 | { | |
258 | req->src = src; | |
259 | req->nbytes = nbytes; | |
260 | req->result = result; | |
261 | } | |
262 | ||
7b5a080b HX |
263 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
264 | u32 mask); | |
265 | ||
266 | static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm) | |
267 | { | |
268 | return &tfm->base; | |
269 | } | |
270 | ||
271 | static inline void crypto_free_shash(struct crypto_shash *tfm) | |
272 | { | |
412e87ae | 273 | crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm)); |
7b5a080b HX |
274 | } |
275 | ||
276 | static inline unsigned int crypto_shash_alignmask( | |
277 | struct crypto_shash *tfm) | |
278 | { | |
279 | return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm)); | |
280 | } | |
281 | ||
97495986 HX |
282 | static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm) |
283 | { | |
284 | return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm)); | |
285 | } | |
286 | ||
7b5a080b HX |
287 | static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg) |
288 | { | |
289 | return container_of(alg, struct shash_alg, base); | |
290 | } | |
291 | ||
292 | static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm) | |
293 | { | |
294 | return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg); | |
295 | } | |
296 | ||
297 | static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm) | |
298 | { | |
299 | return crypto_shash_alg(tfm)->digestsize; | |
300 | } | |
301 | ||
99d27e1c HX |
302 | static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm) |
303 | { | |
304 | return crypto_shash_alg(tfm)->statesize; | |
305 | } | |
306 | ||
7b5a080b HX |
307 | static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm) |
308 | { | |
309 | return crypto_tfm_get_flags(crypto_shash_tfm(tfm)); | |
310 | } | |
311 | ||
312 | static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags) | |
313 | { | |
314 | crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags); | |
315 | } | |
316 | ||
317 | static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags) | |
318 | { | |
319 | crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags); | |
320 | } | |
321 | ||
322 | static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm) | |
323 | { | |
113adefc | 324 | return tfm->descsize; |
7b5a080b HX |
325 | } |
326 | ||
327 | static inline void *shash_desc_ctx(struct shash_desc *desc) | |
328 | { | |
329 | return desc->__ctx; | |
330 | } | |
331 | ||
332 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
333 | unsigned int keylen); | |
334 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
335 | unsigned int len, u8 *out); | |
336 | ||
99d27e1c | 337 | static inline int crypto_shash_export(struct shash_desc *desc, void *out) |
dec8b786 | 338 | { |
99d27e1c | 339 | return crypto_shash_alg(desc->tfm)->export(desc, out); |
dec8b786 HX |
340 | } |
341 | ||
99d27e1c HX |
342 | static inline int crypto_shash_import(struct shash_desc *desc, const void *in) |
343 | { | |
344 | return crypto_shash_alg(desc->tfm)->import(desc, in); | |
345 | } | |
dec8b786 | 346 | |
7b5a080b HX |
347 | static inline int crypto_shash_init(struct shash_desc *desc) |
348 | { | |
349 | return crypto_shash_alg(desc->tfm)->init(desc); | |
350 | } | |
351 | ||
352 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
353 | unsigned int len); | |
354 | int crypto_shash_final(struct shash_desc *desc, u8 *out); | |
355 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
356 | unsigned int len, u8 *out); | |
357 | ||
18e33e6d | 358 | #endif /* _CRYPTO_HASH_H */ |