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