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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 | ||
7b5a080b HX |
18 | struct shash_desc { |
19 | struct crypto_shash *tfm; | |
20 | u32 flags; | |
21 | ||
22 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
23 | }; | |
24 | ||
25 | struct shash_alg { | |
26 | int (*init)(struct shash_desc *desc); | |
27 | int (*update)(struct shash_desc *desc, const u8 *data, | |
28 | unsigned int len); | |
29 | int (*final)(struct shash_desc *desc, u8 *out); | |
30 | int (*finup)(struct shash_desc *desc, const u8 *data, | |
31 | unsigned int len, u8 *out); | |
32 | int (*digest)(struct shash_desc *desc, const u8 *data, | |
33 | unsigned int len, u8 *out); | |
99d27e1c HX |
34 | int (*export)(struct shash_desc *desc, void *out); |
35 | int (*import)(struct shash_desc *desc, const void *in); | |
7b5a080b HX |
36 | int (*setkey)(struct crypto_shash *tfm, const u8 *key, |
37 | unsigned int keylen); | |
38 | ||
39 | unsigned int descsize; | |
40 | unsigned int digestsize; | |
99d27e1c | 41 | unsigned int statesize; |
7b5a080b HX |
42 | |
43 | struct crypto_alg base; | |
44 | }; | |
45 | ||
18e33e6d HX |
46 | struct crypto_ahash { |
47 | struct crypto_tfm base; | |
48 | }; | |
49 | ||
7b5a080b | 50 | struct crypto_shash { |
113adefc | 51 | unsigned int descsize; |
7b5a080b HX |
52 | struct crypto_tfm base; |
53 | }; | |
54 | ||
18e33e6d HX |
55 | static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm) |
56 | { | |
57 | return (struct crypto_ahash *)tfm; | |
58 | } | |
59 | ||
60 | static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, | |
61 | u32 type, u32 mask) | |
62 | { | |
63 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
64 | mask &= ~CRYPTO_ALG_TYPE_MASK; | |
65 | type |= CRYPTO_ALG_TYPE_AHASH; | |
66 | mask |= CRYPTO_ALG_TYPE_AHASH_MASK; | |
67 | ||
68 | return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask)); | |
69 | } | |
70 | ||
71 | static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm) | |
72 | { | |
73 | return &tfm->base; | |
74 | } | |
75 | ||
76 | static inline void crypto_free_ahash(struct crypto_ahash *tfm) | |
77 | { | |
78 | crypto_free_tfm(crypto_ahash_tfm(tfm)); | |
79 | } | |
80 | ||
81 | static inline unsigned int crypto_ahash_alignmask( | |
82 | struct crypto_ahash *tfm) | |
83 | { | |
84 | return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm)); | |
85 | } | |
86 | ||
87 | static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm) | |
88 | { | |
89 | return &crypto_ahash_tfm(tfm)->crt_ahash; | |
90 | } | |
91 | ||
92 | static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm) | |
93 | { | |
94 | return crypto_ahash_crt(tfm)->digestsize; | |
95 | } | |
96 | ||
97 | static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm) | |
98 | { | |
99 | return crypto_tfm_get_flags(crypto_ahash_tfm(tfm)); | |
100 | } | |
101 | ||
102 | static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags) | |
103 | { | |
104 | crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags); | |
105 | } | |
106 | ||
107 | static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags) | |
108 | { | |
109 | crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags); | |
110 | } | |
111 | ||
112 | static inline struct crypto_ahash *crypto_ahash_reqtfm( | |
113 | struct ahash_request *req) | |
114 | { | |
115 | return __crypto_ahash_cast(req->base.tfm); | |
116 | } | |
117 | ||
118 | static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm) | |
119 | { | |
120 | return crypto_ahash_crt(tfm)->reqsize; | |
121 | } | |
122 | ||
dec8b786 HX |
123 | static inline void *ahash_request_ctx(struct ahash_request *req) |
124 | { | |
125 | return req->__ctx; | |
126 | } | |
127 | ||
18e33e6d HX |
128 | static inline int crypto_ahash_setkey(struct crypto_ahash *tfm, |
129 | const u8 *key, unsigned int keylen) | |
130 | { | |
131 | struct ahash_tfm *crt = crypto_ahash_crt(tfm); | |
132 | ||
133 | return crt->setkey(tfm, key, keylen); | |
134 | } | |
135 | ||
136 | static inline int crypto_ahash_digest(struct ahash_request *req) | |
137 | { | |
138 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); | |
139 | return crt->digest(req); | |
140 | } | |
141 | ||
dec8b786 HX |
142 | static inline void crypto_ahash_export(struct ahash_request *req, u8 *out) |
143 | { | |
144 | memcpy(out, ahash_request_ctx(req), | |
145 | crypto_ahash_reqsize(crypto_ahash_reqtfm(req))); | |
146 | } | |
147 | ||
148 | int crypto_ahash_import(struct ahash_request *req, const u8 *in); | |
149 | ||
318e5313 HX |
150 | static inline int crypto_ahash_init(struct ahash_request *req) |
151 | { | |
152 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); | |
153 | return crt->init(req); | |
154 | } | |
155 | ||
156 | static inline int crypto_ahash_update(struct ahash_request *req) | |
157 | { | |
158 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); | |
159 | return crt->update(req); | |
160 | } | |
161 | ||
162 | static inline int crypto_ahash_final(struct ahash_request *req) | |
163 | { | |
164 | struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); | |
165 | return crt->final(req); | |
166 | } | |
167 | ||
18e33e6d HX |
168 | static inline void ahash_request_set_tfm(struct ahash_request *req, |
169 | struct crypto_ahash *tfm) | |
170 | { | |
171 | req->base.tfm = crypto_ahash_tfm(tfm); | |
172 | } | |
173 | ||
174 | static inline struct ahash_request *ahash_request_alloc( | |
175 | struct crypto_ahash *tfm, gfp_t gfp) | |
176 | { | |
177 | struct ahash_request *req; | |
178 | ||
179 | req = kmalloc(sizeof(struct ahash_request) + | |
180 | crypto_ahash_reqsize(tfm), gfp); | |
181 | ||
182 | if (likely(req)) | |
183 | ahash_request_set_tfm(req, tfm); | |
184 | ||
185 | return req; | |
186 | } | |
187 | ||
188 | static inline void ahash_request_free(struct ahash_request *req) | |
189 | { | |
aef73cfc | 190 | kzfree(req); |
18e33e6d HX |
191 | } |
192 | ||
193 | static inline struct ahash_request *ahash_request_cast( | |
194 | struct crypto_async_request *req) | |
195 | { | |
196 | return container_of(req, struct ahash_request, base); | |
197 | } | |
198 | ||
199 | static inline void ahash_request_set_callback(struct ahash_request *req, | |
200 | u32 flags, | |
201 | crypto_completion_t complete, | |
202 | void *data) | |
203 | { | |
204 | req->base.complete = complete; | |
205 | req->base.data = data; | |
206 | req->base.flags = flags; | |
207 | } | |
208 | ||
209 | static inline void ahash_request_set_crypt(struct ahash_request *req, | |
210 | struct scatterlist *src, u8 *result, | |
211 | unsigned int nbytes) | |
212 | { | |
213 | req->src = src; | |
214 | req->nbytes = nbytes; | |
215 | req->result = result; | |
216 | } | |
217 | ||
7b5a080b HX |
218 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
219 | u32 mask); | |
220 | ||
221 | static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm) | |
222 | { | |
223 | return &tfm->base; | |
224 | } | |
225 | ||
226 | static inline void crypto_free_shash(struct crypto_shash *tfm) | |
227 | { | |
412e87ae | 228 | crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm)); |
7b5a080b HX |
229 | } |
230 | ||
231 | static inline unsigned int crypto_shash_alignmask( | |
232 | struct crypto_shash *tfm) | |
233 | { | |
234 | return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm)); | |
235 | } | |
236 | ||
97495986 HX |
237 | static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm) |
238 | { | |
239 | return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm)); | |
240 | } | |
241 | ||
7b5a080b HX |
242 | static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg) |
243 | { | |
244 | return container_of(alg, struct shash_alg, base); | |
245 | } | |
246 | ||
247 | static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm) | |
248 | { | |
249 | return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg); | |
250 | } | |
251 | ||
252 | static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm) | |
253 | { | |
254 | return crypto_shash_alg(tfm)->digestsize; | |
255 | } | |
256 | ||
99d27e1c HX |
257 | static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm) |
258 | { | |
259 | return crypto_shash_alg(tfm)->statesize; | |
260 | } | |
261 | ||
7b5a080b HX |
262 | static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm) |
263 | { | |
264 | return crypto_tfm_get_flags(crypto_shash_tfm(tfm)); | |
265 | } | |
266 | ||
267 | static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags) | |
268 | { | |
269 | crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags); | |
270 | } | |
271 | ||
272 | static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags) | |
273 | { | |
274 | crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags); | |
275 | } | |
276 | ||
277 | static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm) | |
278 | { | |
113adefc | 279 | return tfm->descsize; |
7b5a080b HX |
280 | } |
281 | ||
282 | static inline void *shash_desc_ctx(struct shash_desc *desc) | |
283 | { | |
284 | return desc->__ctx; | |
285 | } | |
286 | ||
287 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
288 | unsigned int keylen); | |
289 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
290 | unsigned int len, u8 *out); | |
291 | ||
99d27e1c | 292 | static inline int crypto_shash_export(struct shash_desc *desc, void *out) |
dec8b786 | 293 | { |
99d27e1c | 294 | return crypto_shash_alg(desc->tfm)->export(desc, out); |
dec8b786 HX |
295 | } |
296 | ||
99d27e1c HX |
297 | static inline int crypto_shash_import(struct shash_desc *desc, const void *in) |
298 | { | |
299 | return crypto_shash_alg(desc->tfm)->import(desc, in); | |
300 | } | |
dec8b786 | 301 | |
7b5a080b HX |
302 | static inline int crypto_shash_init(struct shash_desc *desc) |
303 | { | |
304 | return crypto_shash_alg(desc->tfm)->init(desc); | |
305 | } | |
306 | ||
307 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
308 | unsigned int len); | |
309 | int crypto_shash_final(struct shash_desc *desc, u8 *out); | |
310 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
311 | unsigned int len, u8 *out); | |
312 | ||
18e33e6d | 313 | #endif /* _CRYPTO_HASH_H */ |