Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
3c09f17c HX |
2 | /* |
3 | * Authenc: Simple AEAD wrapper for IPsec | |
4 | * | |
92d95ba9 | 5 | * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au> |
3c09f17c HX |
6 | */ |
7 | ||
68acbf84 | 8 | #include <crypto/internal/aead.h> |
5f7082ed | 9 | #include <crypto/internal/hash.h> |
9ffde35a | 10 | #include <crypto/internal/skcipher.h> |
e236d4a8 | 11 | #include <crypto/authenc.h> |
92d95ba9 | 12 | #include <crypto/null.h> |
42c271c6 | 13 | #include <crypto/scatterwalk.h> |
3c09f17c HX |
14 | #include <linux/err.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
e236d4a8 | 18 | #include <linux/rtnetlink.h> |
3c09f17c HX |
19 | #include <linux/slab.h> |
20 | #include <linux/spinlock.h> | |
21 | ||
3c09f17c | 22 | struct authenc_instance_ctx { |
cbdcf80d | 23 | struct crypto_ahash_spawn auth; |
9ffde35a | 24 | struct crypto_skcipher_spawn enc; |
92d95ba9 | 25 | unsigned int reqoff; |
3c09f17c HX |
26 | }; |
27 | ||
28 | struct crypto_authenc_ctx { | |
cbdcf80d | 29 | struct crypto_ahash *auth; |
7217d49f | 30 | struct crypto_skcipher *enc; |
8d605398 | 31 | struct crypto_sync_skcipher *null; |
3c09f17c HX |
32 | }; |
33 | ||
cbdcf80d | 34 | struct authenc_request_ctx { |
92d95ba9 HX |
35 | struct scatterlist src[2]; |
36 | struct scatterlist dst[2]; | |
cbdcf80d SK |
37 | char tail[]; |
38 | }; | |
39 | ||
180ce7e8 HX |
40 | static void authenc_request_complete(struct aead_request *req, int err) |
41 | { | |
42 | if (err != -EINPROGRESS) | |
43 | aead_request_complete(req, err); | |
44 | } | |
45 | ||
bc6e2bdb MK |
46 | int crypto_authenc_extractkeys(struct crypto_authenc_keys *keys, const u8 *key, |
47 | unsigned int keylen) | |
3c09f17c | 48 | { |
bc6e2bdb | 49 | struct rtattr *rta = (struct rtattr *)key; |
e236d4a8 | 50 | struct crypto_authenc_key_param *param; |
3c09f17c | 51 | |
12dc5e62 | 52 | if (!RTA_OK(rta, keylen)) |
bc6e2bdb | 53 | return -EINVAL; |
e236d4a8 | 54 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) |
bc6e2bdb | 55 | return -EINVAL; |
8f9c4693 EB |
56 | |
57 | /* | |
58 | * RTA_OK() didn't align the rtattr's payload when validating that it | |
59 | * fits in the buffer. Yet, the keys should start on the next 4-byte | |
60 | * aligned boundary. To avoid confusion, require that the rtattr | |
61 | * payload be exactly the param struct, which has a 4-byte aligned size. | |
62 | */ | |
63 | if (RTA_PAYLOAD(rta) != sizeof(*param)) | |
bc6e2bdb | 64 | return -EINVAL; |
8f9c4693 | 65 | BUILD_BUG_ON(sizeof(*param) % RTA_ALIGNTO); |
e236d4a8 HX |
66 | |
67 | param = RTA_DATA(rta); | |
bc6e2bdb | 68 | keys->enckeylen = be32_to_cpu(param->enckeylen); |
e236d4a8 | 69 | |
8f9c4693 EB |
70 | key += rta->rta_len; |
71 | keylen -= rta->rta_len; | |
e236d4a8 | 72 | |
bc6e2bdb MK |
73 | if (keylen < keys->enckeylen) |
74 | return -EINVAL; | |
75 | ||
76 | keys->authkeylen = keylen - keys->enckeylen; | |
77 | keys->authkey = key; | |
78 | keys->enckey = key + keys->authkeylen; | |
e236d4a8 | 79 | |
bc6e2bdb MK |
80 | return 0; |
81 | } | |
82 | EXPORT_SYMBOL_GPL(crypto_authenc_extractkeys); | |
83 | ||
84 | static int crypto_authenc_setkey(struct crypto_aead *authenc, const u8 *key, | |
85 | unsigned int keylen) | |
86 | { | |
87 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); | |
88 | struct crypto_ahash *auth = ctx->auth; | |
7217d49f | 89 | struct crypto_skcipher *enc = ctx->enc; |
bc6e2bdb MK |
90 | struct crypto_authenc_keys keys; |
91 | int err = -EINVAL; | |
92 | ||
93 | if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) | |
674f368a | 94 | goto out; |
3c09f17c | 95 | |
cbdcf80d SK |
96 | crypto_ahash_clear_flags(auth, CRYPTO_TFM_REQ_MASK); |
97 | crypto_ahash_set_flags(auth, crypto_aead_get_flags(authenc) & | |
3c09f17c | 98 | CRYPTO_TFM_REQ_MASK); |
bc6e2bdb | 99 | err = crypto_ahash_setkey(auth, keys.authkey, keys.authkeylen); |
3c09f17c HX |
100 | if (err) |
101 | goto out; | |
102 | ||
7217d49f HX |
103 | crypto_skcipher_clear_flags(enc, CRYPTO_TFM_REQ_MASK); |
104 | crypto_skcipher_set_flags(enc, crypto_aead_get_flags(authenc) & | |
105 | CRYPTO_TFM_REQ_MASK); | |
106 | err = crypto_skcipher_setkey(enc, keys.enckey, keys.enckeylen); | |
3c09f17c | 107 | out: |
ad2fdcdf | 108 | memzero_explicit(&keys, sizeof(keys)); |
3c09f17c HX |
109 | return err; |
110 | } | |
111 | ||
cbdcf80d SK |
112 | static void authenc_geniv_ahash_done(struct crypto_async_request *areq, int err) |
113 | { | |
114 | struct aead_request *req = areq->data; | |
115 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
92d95ba9 HX |
116 | struct aead_instance *inst = aead_alg_instance(authenc); |
117 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); | |
cbdcf80d | 118 | struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
92d95ba9 | 119 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); |
cbdcf80d SK |
120 | |
121 | if (err) | |
122 | goto out; | |
123 | ||
92d95ba9 HX |
124 | scatterwalk_map_and_copy(ahreq->result, req->dst, |
125 | req->assoclen + req->cryptlen, | |
cbdcf80d SK |
126 | crypto_aead_authsize(authenc), 1); |
127 | ||
128 | out: | |
129 | aead_request_complete(req, err); | |
130 | } | |
131 | ||
92d95ba9 | 132 | static int crypto_authenc_genicv(struct aead_request *req, unsigned int flags) |
cbdcf80d SK |
133 | { |
134 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
92d95ba9 | 135 | struct aead_instance *inst = aead_alg_instance(authenc); |
cbdcf80d | 136 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); |
92d95ba9 | 137 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); |
cbdcf80d SK |
138 | struct crypto_ahash *auth = ctx->auth; |
139 | struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); | |
92d95ba9 | 140 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); |
cbdcf80d SK |
141 | u8 *hash = areq_ctx->tail; |
142 | int err; | |
3c09f17c | 143 | |
cbdcf80d SK |
144 | hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), |
145 | crypto_ahash_alignmask(auth) + 1); | |
146 | ||
147 | ahash_request_set_tfm(ahreq, auth); | |
92d95ba9 HX |
148 | ahash_request_set_crypt(ahreq, req->dst, hash, |
149 | req->assoclen + req->cryptlen); | |
150 | ahash_request_set_callback(ahreq, flags, | |
151 | authenc_geniv_ahash_done, req); | |
cbdcf80d SK |
152 | |
153 | err = crypto_ahash_digest(ahreq); | |
3c09f17c | 154 | if (err) |
92d95ba9 | 155 | return err; |
3c09f17c | 156 | |
92d95ba9 | 157 | scatterwalk_map_and_copy(hash, req->dst, req->assoclen + req->cryptlen, |
7ba683a6 | 158 | crypto_aead_authsize(authenc), 1); |
92d95ba9 | 159 | |
3c09f17c HX |
160 | return 0; |
161 | } | |
162 | ||
163 | static void crypto_authenc_encrypt_done(struct crypto_async_request *req, | |
164 | int err) | |
165 | { | |
a697690b HX |
166 | struct aead_request *areq = req->data; |
167 | ||
92d95ba9 HX |
168 | if (err) |
169 | goto out; | |
e56dd564 | 170 | |
92d95ba9 | 171 | err = crypto_authenc_genicv(areq, 0); |
3c09f17c | 172 | |
92d95ba9 | 173 | out: |
180ce7e8 | 174 | authenc_request_complete(areq, err); |
3c09f17c HX |
175 | } |
176 | ||
92d95ba9 HX |
177 | static int crypto_authenc_copy_assoc(struct aead_request *req) |
178 | { | |
179 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
180 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); | |
8d605398 | 181 | SYNC_SKCIPHER_REQUEST_ON_STACK(skreq, ctx->null); |
92d95ba9 | 182 | |
8d605398 | 183 | skcipher_request_set_sync_tfm(skreq, ctx->null); |
7217d49f HX |
184 | skcipher_request_set_callback(skreq, aead_request_flags(req), |
185 | NULL, NULL); | |
186 | skcipher_request_set_crypt(skreq, req->src, req->dst, req->assoclen, | |
187 | NULL); | |
188 | ||
189 | return crypto_skcipher_encrypt(skreq); | |
92d95ba9 HX |
190 | } |
191 | ||
3c09f17c HX |
192 | static int crypto_authenc_encrypt(struct aead_request *req) |
193 | { | |
194 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
92d95ba9 | 195 | struct aead_instance *inst = aead_alg_instance(authenc); |
3c09f17c | 196 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); |
92d95ba9 | 197 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); |
50beceba | 198 | struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
7217d49f | 199 | struct crypto_skcipher *enc = ctx->enc; |
e56dd564 | 200 | unsigned int cryptlen = req->cryptlen; |
7217d49f HX |
201 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
202 | ictx->reqoff); | |
92d95ba9 | 203 | struct scatterlist *src, *dst; |
3c09f17c HX |
204 | int err; |
205 | ||
92d95ba9 HX |
206 | src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen); |
207 | dst = src; | |
208 | ||
209 | if (req->src != req->dst) { | |
210 | err = crypto_authenc_copy_assoc(req); | |
211 | if (err) | |
212 | return err; | |
213 | ||
92d95ba9 HX |
214 | dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen); |
215 | } | |
216 | ||
7217d49f HX |
217 | skcipher_request_set_tfm(skreq, enc); |
218 | skcipher_request_set_callback(skreq, aead_request_flags(req), | |
219 | crypto_authenc_encrypt_done, req); | |
220 | skcipher_request_set_crypt(skreq, src, dst, cryptlen, req->iv); | |
3c09f17c | 221 | |
7217d49f | 222 | err = crypto_skcipher_encrypt(skreq); |
3c09f17c HX |
223 | if (err) |
224 | return err; | |
225 | ||
92d95ba9 | 226 | return crypto_authenc_genicv(req, aead_request_flags(req)); |
e56dd564 HX |
227 | } |
228 | ||
92d95ba9 HX |
229 | static int crypto_authenc_decrypt_tail(struct aead_request *req, |
230 | unsigned int flags) | |
e56dd564 | 231 | { |
92d95ba9 HX |
232 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
233 | struct aead_instance *inst = aead_alg_instance(authenc); | |
234 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); | |
235 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); | |
236 | struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); | |
237 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); | |
7217d49f HX |
238 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
239 | ictx->reqoff); | |
92d95ba9 HX |
240 | unsigned int authsize = crypto_aead_authsize(authenc); |
241 | u8 *ihash = ahreq->result + authsize; | |
242 | struct scatterlist *src, *dst; | |
e56dd564 | 243 | |
92d95ba9 | 244 | scatterwalk_map_and_copy(ihash, req->src, ahreq->nbytes, authsize, 0); |
e56dd564 | 245 | |
92d95ba9 HX |
246 | if (crypto_memneq(ihash, ahreq->result, authsize)) |
247 | return -EBADMSG; | |
e56dd564 | 248 | |
92d95ba9 HX |
249 | src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen); |
250 | dst = src; | |
e56dd564 | 251 | |
c34252fd | 252 | if (req->src != req->dst) |
92d95ba9 | 253 | dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen); |
e56dd564 | 254 | |
7217d49f HX |
255 | skcipher_request_set_tfm(skreq, ctx->enc); |
256 | skcipher_request_set_callback(skreq, aead_request_flags(req), | |
257 | req->base.complete, req->base.data); | |
258 | skcipher_request_set_crypt(skreq, src, dst, | |
259 | req->cryptlen - authsize, req->iv); | |
3c09f17c | 260 | |
7217d49f | 261 | return crypto_skcipher_decrypt(skreq); |
3c09f17c HX |
262 | } |
263 | ||
92d95ba9 HX |
264 | static void authenc_verify_ahash_done(struct crypto_async_request *areq, |
265 | int err) | |
3c09f17c | 266 | { |
92d95ba9 | 267 | struct aead_request *req = areq->data; |
cbdcf80d | 268 | |
92d95ba9 HX |
269 | if (err) |
270 | goto out; | |
e56dd564 | 271 | |
92d95ba9 | 272 | err = crypto_authenc_decrypt_tail(req, 0); |
cbdcf80d | 273 | |
92d95ba9 HX |
274 | out: |
275 | authenc_request_complete(req, err); | |
3c09f17c HX |
276 | } |
277 | ||
278 | static int crypto_authenc_decrypt(struct aead_request *req) | |
279 | { | |
280 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
481f34ae | 281 | unsigned int authsize = crypto_aead_authsize(authenc); |
92d95ba9 HX |
282 | struct aead_instance *inst = aead_alg_instance(authenc); |
283 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); | |
284 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); | |
285 | struct crypto_ahash *auth = ctx->auth; | |
286 | struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); | |
287 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); | |
288 | u8 *hash = areq_ctx->tail; | |
3c09f17c HX |
289 | int err; |
290 | ||
92d95ba9 HX |
291 | hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), |
292 | crypto_ahash_alignmask(auth) + 1); | |
481f34ae | 293 | |
92d95ba9 HX |
294 | ahash_request_set_tfm(ahreq, auth); |
295 | ahash_request_set_crypt(ahreq, req->src, hash, | |
296 | req->assoclen + req->cryptlen - authsize); | |
297 | ahash_request_set_callback(ahreq, aead_request_flags(req), | |
298 | authenc_verify_ahash_done, req); | |
299 | ||
300 | err = crypto_ahash_digest(ahreq); | |
3c09f17c HX |
301 | if (err) |
302 | return err; | |
303 | ||
92d95ba9 | 304 | return crypto_authenc_decrypt_tail(req, aead_request_flags(req)); |
3c09f17c HX |
305 | } |
306 | ||
92d95ba9 | 307 | static int crypto_authenc_init_tfm(struct crypto_aead *tfm) |
3c09f17c | 308 | { |
92d95ba9 HX |
309 | struct aead_instance *inst = aead_alg_instance(tfm); |
310 | struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); | |
311 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(tfm); | |
cbdcf80d | 312 | struct crypto_ahash *auth; |
7217d49f | 313 | struct crypto_skcipher *enc; |
8d605398 | 314 | struct crypto_sync_skcipher *null; |
3c09f17c HX |
315 | int err; |
316 | ||
cbdcf80d | 317 | auth = crypto_spawn_ahash(&ictx->auth); |
3c09f17c HX |
318 | if (IS_ERR(auth)) |
319 | return PTR_ERR(auth); | |
320 | ||
60425a8b | 321 | enc = crypto_spawn_skcipher(&ictx->enc); |
3c09f17c HX |
322 | err = PTR_ERR(enc); |
323 | if (IS_ERR(enc)) | |
cbdcf80d | 324 | goto err_free_ahash; |
3c09f17c | 325 | |
3a2d4fb5 | 326 | null = crypto_get_default_null_skcipher(); |
92d95ba9 HX |
327 | err = PTR_ERR(null); |
328 | if (IS_ERR(null)) | |
329 | goto err_free_skcipher; | |
330 | ||
3c09f17c HX |
331 | ctx->auth = auth; |
332 | ctx->enc = enc; | |
92d95ba9 | 333 | ctx->null = null; |
f3542e6d | 334 | |
92d95ba9 HX |
335 | crypto_aead_set_reqsize( |
336 | tfm, | |
25df9194 | 337 | sizeof(struct authenc_request_ctx) + |
92d95ba9 | 338 | ictx->reqoff + |
25df9194 | 339 | max_t(unsigned int, |
92d95ba9 HX |
340 | crypto_ahash_reqsize(auth) + |
341 | sizeof(struct ahash_request), | |
7217d49f HX |
342 | sizeof(struct skcipher_request) + |
343 | crypto_skcipher_reqsize(enc))); | |
3c09f17c HX |
344 | |
345 | return 0; | |
346 | ||
92d95ba9 | 347 | err_free_skcipher: |
7217d49f | 348 | crypto_free_skcipher(enc); |
cbdcf80d SK |
349 | err_free_ahash: |
350 | crypto_free_ahash(auth); | |
3c09f17c HX |
351 | return err; |
352 | } | |
353 | ||
92d95ba9 | 354 | static void crypto_authenc_exit_tfm(struct crypto_aead *tfm) |
3c09f17c | 355 | { |
92d95ba9 | 356 | struct crypto_authenc_ctx *ctx = crypto_aead_ctx(tfm); |
3c09f17c | 357 | |
cbdcf80d | 358 | crypto_free_ahash(ctx->auth); |
7217d49f | 359 | crypto_free_skcipher(ctx->enc); |
3a2d4fb5 | 360 | crypto_put_default_null_skcipher(); |
3c09f17c HX |
361 | } |
362 | ||
92d95ba9 HX |
363 | static void crypto_authenc_free(struct aead_instance *inst) |
364 | { | |
365 | struct authenc_instance_ctx *ctx = aead_instance_ctx(inst); | |
366 | ||
367 | crypto_drop_skcipher(&ctx->enc); | |
368 | crypto_drop_ahash(&ctx->auth); | |
369 | kfree(inst); | |
370 | } | |
371 | ||
372 | static int crypto_authenc_create(struct crypto_template *tmpl, | |
373 | struct rtattr **tb) | |
3c09f17c | 374 | { |
9ffde35a | 375 | struct crypto_attr_type *algt; |
b9f76ddd | 376 | u32 mask; |
92d95ba9 | 377 | struct aead_instance *inst; |
37a861ad | 378 | struct authenc_instance_ctx *ctx; |
cbdcf80d SK |
379 | struct hash_alg_common *auth; |
380 | struct crypto_alg *auth_base; | |
7217d49f | 381 | struct skcipher_alg *enc; |
3c09f17c HX |
382 | int err; |
383 | ||
9ffde35a | 384 | algt = crypto_get_attr_type(tb); |
9ffde35a | 385 | if (IS_ERR(algt)) |
92d95ba9 | 386 | return PTR_ERR(algt); |
3c09f17c | 387 | |
5e4b8c1f | 388 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
92d95ba9 | 389 | return -EINVAL; |
9ffde35a | 390 | |
b9f76ddd EB |
391 | mask = crypto_requires_sync(algt->type, algt->mask); |
392 | ||
3c09f17c | 393 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
3c09f17c | 394 | if (!inst) |
37a861ad | 395 | return -ENOMEM; |
92d95ba9 | 396 | ctx = aead_instance_ctx(inst); |
3c09f17c | 397 | |
37a861ad EB |
398 | err = crypto_grab_ahash(&ctx->auth, aead_crypto_instance(inst), |
399 | crypto_attr_alg_name(tb[1]), 0, mask); | |
3c09f17c HX |
400 | if (err) |
401 | goto err_free_inst; | |
37a861ad EB |
402 | auth = crypto_spawn_ahash_alg(&ctx->auth); |
403 | auth_base = &auth->base; | |
3c09f17c | 404 | |
b9f76ddd | 405 | err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst), |
37a861ad | 406 | crypto_attr_alg_name(tb[2]), 0, mask); |
3c09f17c | 407 | if (err) |
37a861ad | 408 | goto err_free_inst; |
7217d49f | 409 | enc = crypto_spawn_skcipher_alg(&ctx->enc); |
9ffde35a | 410 | |
92d95ba9 HX |
411 | ctx->reqoff = ALIGN(2 * auth->digestsize + auth_base->cra_alignmask, |
412 | auth_base->cra_alignmask + 1); | |
413 | ||
9ffde35a | 414 | err = -ENAMETOOLONG; |
92d95ba9 | 415 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
7217d49f HX |
416 | "authenc(%s,%s)", auth_base->cra_name, |
417 | enc->base.cra_name) >= | |
9ffde35a | 418 | CRYPTO_MAX_ALG_NAME) |
37a861ad | 419 | goto err_free_inst; |
9ffde35a | 420 | |
92d95ba9 | 421 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
cbdcf80d | 422 | "authenc(%s,%s)", auth_base->cra_driver_name, |
7217d49f | 423 | enc->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
37a861ad | 424 | goto err_free_inst; |
9ffde35a | 425 | |
7217d49f HX |
426 | inst->alg.base.cra_flags = (auth_base->cra_flags | |
427 | enc->base.cra_flags) & CRYPTO_ALG_ASYNC; | |
428 | inst->alg.base.cra_priority = enc->base.cra_priority * 10 + | |
92d95ba9 | 429 | auth_base->cra_priority; |
7217d49f | 430 | inst->alg.base.cra_blocksize = enc->base.cra_blocksize; |
92d95ba9 | 431 | inst->alg.base.cra_alignmask = auth_base->cra_alignmask | |
7217d49f | 432 | enc->base.cra_alignmask; |
92d95ba9 HX |
433 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_ctx); |
434 | ||
7217d49f HX |
435 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(enc); |
436 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(enc); | |
92d95ba9 | 437 | inst->alg.maxauthsize = auth->digestsize; |
3c09f17c | 438 | |
92d95ba9 HX |
439 | inst->alg.init = crypto_authenc_init_tfm; |
440 | inst->alg.exit = crypto_authenc_exit_tfm; | |
3c09f17c | 441 | |
92d95ba9 HX |
442 | inst->alg.setkey = crypto_authenc_setkey; |
443 | inst->alg.encrypt = crypto_authenc_encrypt; | |
444 | inst->alg.decrypt = crypto_authenc_decrypt; | |
3c09f17c | 445 | |
92d95ba9 | 446 | inst->free = crypto_authenc_free; |
3c09f17c | 447 | |
92d95ba9 | 448 | err = aead_register_instance(tmpl, inst); |
37a861ad | 449 | if (err) { |
3c09f17c | 450 | err_free_inst: |
37a861ad EB |
451 | crypto_authenc_free(inst); |
452 | } | |
453 | return err; | |
3c09f17c HX |
454 | } |
455 | ||
3c09f17c HX |
456 | static struct crypto_template crypto_authenc_tmpl = { |
457 | .name = "authenc", | |
92d95ba9 | 458 | .create = crypto_authenc_create, |
3c09f17c HX |
459 | .module = THIS_MODULE, |
460 | }; | |
461 | ||
462 | static int __init crypto_authenc_module_init(void) | |
463 | { | |
464 | return crypto_register_template(&crypto_authenc_tmpl); | |
465 | } | |
466 | ||
467 | static void __exit crypto_authenc_module_exit(void) | |
468 | { | |
469 | crypto_unregister_template(&crypto_authenc_tmpl); | |
470 | } | |
471 | ||
c4741b23 | 472 | subsys_initcall(crypto_authenc_module_init); |
3c09f17c HX |
473 | module_exit(crypto_authenc_module_exit); |
474 | ||
475 | MODULE_LICENSE("GPL"); | |
476 | MODULE_DESCRIPTION("Simple AEAD wrapper for IPsec"); | |
4943ba16 | 477 | MODULE_ALIAS_CRYPTO("authenc"); |