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