Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a5079d08 SK |
2 | /* |
3 | * authencesn.c - AEAD wrapper for IPsec with extended sequence numbers, | |
4 | * derived from authenc.c | |
5 | * | |
6 | * Copyright (C) 2010 secunet Security Networks AG | |
7 | * Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com> | |
104880a6 | 8 | * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au> |
a5079d08 SK |
9 | */ |
10 | ||
7fb2a4bd | 11 | #include <crypto/internal/aead.h> |
a5079d08 SK |
12 | #include <crypto/internal/hash.h> |
13 | #include <crypto/internal/skcipher.h> | |
14 | #include <crypto/authenc.h> | |
104880a6 | 15 | #include <crypto/null.h> |
a5079d08 SK |
16 | #include <crypto/scatterwalk.h> |
17 | #include <linux/err.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/spinlock.h> | |
24 | ||
25 | struct authenc_esn_instance_ctx { | |
26 | struct crypto_ahash_spawn auth; | |
27 | struct crypto_skcipher_spawn enc; | |
28 | }; | |
29 | ||
30 | struct crypto_authenc_esn_ctx { | |
31 | unsigned int reqoff; | |
32 | struct crypto_ahash *auth; | |
e75445a8 | 33 | struct crypto_skcipher *enc; |
8d605398 | 34 | struct crypto_sync_skcipher *null; |
a5079d08 SK |
35 | }; |
36 | ||
37 | struct authenc_esn_request_ctx { | |
104880a6 HX |
38 | struct scatterlist src[2]; |
39 | struct scatterlist dst[2]; | |
a5079d08 SK |
40 | char tail[]; |
41 | }; | |
42 | ||
43 | static void authenc_esn_request_complete(struct aead_request *req, int err) | |
44 | { | |
45 | if (err != -EINPROGRESS) | |
46 | aead_request_complete(req, err); | |
47 | } | |
48 | ||
104880a6 HX |
49 | static int crypto_authenc_esn_setauthsize(struct crypto_aead *authenc_esn, |
50 | unsigned int authsize) | |
51 | { | |
52 | if (authsize > 0 && authsize < 4) | |
53 | return -EINVAL; | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
a5079d08 SK |
58 | static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key, |
59 | unsigned int keylen) | |
60 | { | |
a5079d08 SK |
61 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
62 | struct crypto_ahash *auth = ctx->auth; | |
e75445a8 | 63 | struct crypto_skcipher *enc = ctx->enc; |
fddc2c43 | 64 | struct crypto_authenc_keys keys; |
a5079d08 SK |
65 | int err = -EINVAL; |
66 | ||
fddc2c43 | 67 | if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) |
674f368a | 68 | goto out; |
a5079d08 SK |
69 | |
70 | crypto_ahash_clear_flags(auth, CRYPTO_TFM_REQ_MASK); | |
71 | crypto_ahash_set_flags(auth, crypto_aead_get_flags(authenc_esn) & | |
72 | CRYPTO_TFM_REQ_MASK); | |
fddc2c43 | 73 | err = crypto_ahash_setkey(auth, keys.authkey, keys.authkeylen); |
a5079d08 SK |
74 | if (err) |
75 | goto out; | |
76 | ||
e75445a8 HX |
77 | crypto_skcipher_clear_flags(enc, CRYPTO_TFM_REQ_MASK); |
78 | crypto_skcipher_set_flags(enc, crypto_aead_get_flags(authenc_esn) & | |
a5079d08 | 79 | CRYPTO_TFM_REQ_MASK); |
e75445a8 | 80 | err = crypto_skcipher_setkey(enc, keys.enckey, keys.enckeylen); |
a5079d08 | 81 | out: |
31545df3 | 82 | memzero_explicit(&keys, sizeof(keys)); |
a5079d08 | 83 | return err; |
a5079d08 SK |
84 | } |
85 | ||
104880a6 HX |
86 | static int crypto_authenc_esn_genicv_tail(struct aead_request *req, |
87 | unsigned int flags) | |
a5079d08 | 88 | { |
a5079d08 | 89 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
a5079d08 | 90 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); |
03be4e45 | 91 | u8 *hash = areq_ctx->tail; |
104880a6 HX |
92 | unsigned int authsize = crypto_aead_authsize(authenc_esn); |
93 | unsigned int assoclen = req->assoclen; | |
94 | unsigned int cryptlen = req->cryptlen; | |
95 | struct scatterlist *dst = req->dst; | |
96 | u32 tmp[2]; | |
a5079d08 | 97 | |
104880a6 HX |
98 | /* Move high-order bits of sequence number back. */ |
99 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); | |
100 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); | |
101 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); | |
a5079d08 | 102 | |
104880a6 HX |
103 | scatterwalk_map_and_copy(hash, dst, assoclen + cryptlen, authsize, 1); |
104 | return 0; | |
a5079d08 SK |
105 | } |
106 | ||
255e48eb | 107 | static void authenc_esn_geniv_ahash_done(void *data, int err) |
a5079d08 | 108 | { |
255e48eb | 109 | struct aead_request *req = data; |
a5079d08 | 110 | |
104880a6 | 111 | err = err ?: crypto_authenc_esn_genicv_tail(req, 0); |
a5079d08 SK |
112 | aead_request_complete(req, err); |
113 | } | |
114 | ||
104880a6 HX |
115 | static int crypto_authenc_esn_genicv(struct aead_request *req, |
116 | unsigned int flags) | |
a5079d08 | 117 | { |
a5079d08 | 118 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
a5079d08 | 119 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); |
a5079d08 | 120 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
104880a6 | 121 | struct crypto_ahash *auth = ctx->auth; |
03be4e45 | 122 | u8 *hash = areq_ctx->tail; |
a5079d08 | 123 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); |
104880a6 HX |
124 | unsigned int authsize = crypto_aead_authsize(authenc_esn); |
125 | unsigned int assoclen = req->assoclen; | |
a5079d08 | 126 | unsigned int cryptlen = req->cryptlen; |
104880a6 HX |
127 | struct scatterlist *dst = req->dst; |
128 | u32 tmp[2]; | |
a5079d08 | 129 | |
104880a6 HX |
130 | if (!authsize) |
131 | return 0; | |
a5079d08 | 132 | |
104880a6 HX |
133 | /* Move high-order bits of sequence number to the end. */ |
134 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); | |
135 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); | |
136 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); | |
a5079d08 | 137 | |
104880a6 HX |
138 | sg_init_table(areq_ctx->dst, 2); |
139 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); | |
a5079d08 | 140 | |
104880a6 HX |
141 | ahash_request_set_tfm(ahreq, auth); |
142 | ahash_request_set_crypt(ahreq, dst, hash, assoclen + cryptlen); | |
143 | ahash_request_set_callback(ahreq, flags, | |
144 | authenc_esn_geniv_ahash_done, req); | |
a5079d08 | 145 | |
104880a6 HX |
146 | return crypto_ahash_digest(ahreq) ?: |
147 | crypto_authenc_esn_genicv_tail(req, aead_request_flags(req)); | |
a5079d08 SK |
148 | } |
149 | ||
150 | ||
255e48eb | 151 | static void crypto_authenc_esn_encrypt_done(void *data, int err) |
a5079d08 | 152 | { |
255e48eb | 153 | struct aead_request *areq = data; |
a5079d08 | 154 | |
104880a6 HX |
155 | if (!err) |
156 | err = crypto_authenc_esn_genicv(areq, 0); | |
a5079d08 | 157 | |
104880a6 | 158 | authenc_esn_request_complete(areq, err); |
a5079d08 SK |
159 | } |
160 | ||
104880a6 | 161 | static int crypto_authenc_esn_copy(struct aead_request *req, unsigned int len) |
a5079d08 SK |
162 | { |
163 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
164 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); | |
8d605398 | 165 | SYNC_SKCIPHER_REQUEST_ON_STACK(skreq, ctx->null); |
a5079d08 | 166 | |
8d605398 | 167 | skcipher_request_set_sync_tfm(skreq, ctx->null); |
e75445a8 HX |
168 | skcipher_request_set_callback(skreq, aead_request_flags(req), |
169 | NULL, NULL); | |
170 | skcipher_request_set_crypt(skreq, req->src, req->dst, len, NULL); | |
171 | ||
172 | return crypto_skcipher_encrypt(skreq); | |
a5079d08 SK |
173 | } |
174 | ||
104880a6 | 175 | static int crypto_authenc_esn_encrypt(struct aead_request *req) |
a5079d08 SK |
176 | { |
177 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
178 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
104880a6 | 179 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
e75445a8 HX |
180 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
181 | ctx->reqoff); | |
182 | struct crypto_skcipher *enc = ctx->enc; | |
104880a6 | 183 | unsigned int assoclen = req->assoclen; |
a5079d08 | 184 | unsigned int cryptlen = req->cryptlen; |
104880a6 HX |
185 | struct scatterlist *src, *dst; |
186 | int err; | |
a5079d08 | 187 | |
104880a6 HX |
188 | sg_init_table(areq_ctx->src, 2); |
189 | src = scatterwalk_ffwd(areq_ctx->src, req->src, assoclen); | |
190 | dst = src; | |
a5079d08 | 191 | |
104880a6 HX |
192 | if (req->src != req->dst) { |
193 | err = crypto_authenc_esn_copy(req, assoclen); | |
194 | if (err) | |
195 | return err; | |
a5079d08 | 196 | |
104880a6 HX |
197 | sg_init_table(areq_ctx->dst, 2); |
198 | dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, assoclen); | |
a5079d08 SK |
199 | } |
200 | ||
e75445a8 HX |
201 | skcipher_request_set_tfm(skreq, enc); |
202 | skcipher_request_set_callback(skreq, aead_request_flags(req), | |
203 | crypto_authenc_esn_encrypt_done, req); | |
204 | skcipher_request_set_crypt(skreq, src, dst, cryptlen, req->iv); | |
a5079d08 | 205 | |
e75445a8 | 206 | err = crypto_skcipher_encrypt(skreq); |
a5079d08 SK |
207 | if (err) |
208 | return err; | |
209 | ||
104880a6 | 210 | return crypto_authenc_esn_genicv(req, aead_request_flags(req)); |
a5079d08 SK |
211 | } |
212 | ||
104880a6 HX |
213 | static int crypto_authenc_esn_decrypt_tail(struct aead_request *req, |
214 | unsigned int flags) | |
a5079d08 | 215 | { |
104880a6 HX |
216 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
217 | unsigned int authsize = crypto_aead_authsize(authenc_esn); | |
218 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
219 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); | |
e75445a8 HX |
220 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
221 | ctx->reqoff); | |
104880a6 | 222 | struct crypto_ahash *auth = ctx->auth; |
03be4e45 | 223 | u8 *ohash = areq_ctx->tail; |
104880a6 HX |
224 | unsigned int cryptlen = req->cryptlen - authsize; |
225 | unsigned int assoclen = req->assoclen; | |
226 | struct scatterlist *dst = req->dst; | |
227 | u8 *ihash = ohash + crypto_ahash_digestsize(auth); | |
228 | u32 tmp[2]; | |
a5079d08 | 229 | |
41cdf7a4 HX |
230 | if (!authsize) |
231 | goto decrypt; | |
232 | ||
104880a6 HX |
233 | /* Move high-order bits of sequence number back. */ |
234 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); | |
235 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); | |
236 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); | |
a5079d08 | 237 | |
104880a6 HX |
238 | if (crypto_memneq(ihash, ohash, authsize)) |
239 | return -EBADMSG; | |
a5079d08 | 240 | |
41cdf7a4 HX |
241 | decrypt: |
242 | ||
104880a6 HX |
243 | sg_init_table(areq_ctx->dst, 2); |
244 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, assoclen); | |
a5079d08 | 245 | |
e75445a8 HX |
246 | skcipher_request_set_tfm(skreq, ctx->enc); |
247 | skcipher_request_set_callback(skreq, flags, | |
248 | req->base.complete, req->base.data); | |
249 | skcipher_request_set_crypt(skreq, dst, dst, cryptlen, req->iv); | |
a5079d08 | 250 | |
e75445a8 | 251 | return crypto_skcipher_decrypt(skreq); |
a5079d08 SK |
252 | } |
253 | ||
255e48eb | 254 | static void authenc_esn_verify_ahash_done(void *data, int err) |
a5079d08 | 255 | { |
255e48eb | 256 | struct aead_request *req = data; |
a5079d08 | 257 | |
104880a6 | 258 | err = err ?: crypto_authenc_esn_decrypt_tail(req, 0); |
a7773363 | 259 | authenc_esn_request_complete(req, err); |
a5079d08 SK |
260 | } |
261 | ||
104880a6 | 262 | static int crypto_authenc_esn_decrypt(struct aead_request *req) |
a5079d08 SK |
263 | { |
264 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
265 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
104880a6 HX |
266 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
267 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); | |
268 | unsigned int authsize = crypto_aead_authsize(authenc_esn); | |
269 | struct crypto_ahash *auth = ctx->auth; | |
03be4e45 | 270 | u8 *ohash = areq_ctx->tail; |
104880a6 HX |
271 | unsigned int assoclen = req->assoclen; |
272 | unsigned int cryptlen = req->cryptlen; | |
273 | u8 *ihash = ohash + crypto_ahash_digestsize(auth); | |
274 | struct scatterlist *dst = req->dst; | |
275 | u32 tmp[2]; | |
276 | int err; | |
a5079d08 | 277 | |
104880a6 | 278 | cryptlen -= authsize; |
a5079d08 | 279 | |
104880a6 HX |
280 | if (req->src != dst) { |
281 | err = crypto_authenc_esn_copy(req, assoclen + cryptlen); | |
282 | if (err) | |
283 | return err; | |
284 | } | |
a5079d08 | 285 | |
104880a6 HX |
286 | scatterwalk_map_and_copy(ihash, req->src, assoclen + cryptlen, |
287 | authsize, 0); | |
a5079d08 | 288 | |
104880a6 HX |
289 | if (!authsize) |
290 | goto tail; | |
a5079d08 | 291 | |
104880a6 HX |
292 | /* Move high-order bits of sequence number to the end. */ |
293 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); | |
294 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); | |
295 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); | |
a5079d08 | 296 | |
104880a6 HX |
297 | sg_init_table(areq_ctx->dst, 2); |
298 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); | |
a5079d08 | 299 | |
104880a6 HX |
300 | ahash_request_set_tfm(ahreq, auth); |
301 | ahash_request_set_crypt(ahreq, dst, ohash, assoclen + cryptlen); | |
302 | ahash_request_set_callback(ahreq, aead_request_flags(req), | |
303 | authenc_esn_verify_ahash_done, req); | |
a5079d08 | 304 | |
104880a6 | 305 | err = crypto_ahash_digest(ahreq); |
a5079d08 SK |
306 | if (err) |
307 | return err; | |
308 | ||
104880a6 HX |
309 | tail: |
310 | return crypto_authenc_esn_decrypt_tail(req, aead_request_flags(req)); | |
a5079d08 SK |
311 | } |
312 | ||
104880a6 | 313 | static int crypto_authenc_esn_init_tfm(struct crypto_aead *tfm) |
a5079d08 | 314 | { |
104880a6 HX |
315 | struct aead_instance *inst = aead_alg_instance(tfm); |
316 | struct authenc_esn_instance_ctx *ictx = aead_instance_ctx(inst); | |
317 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); | |
a5079d08 | 318 | struct crypto_ahash *auth; |
e75445a8 | 319 | struct crypto_skcipher *enc; |
8d605398 | 320 | struct crypto_sync_skcipher *null; |
a5079d08 SK |
321 | int err; |
322 | ||
323 | auth = crypto_spawn_ahash(&ictx->auth); | |
324 | if (IS_ERR(auth)) | |
325 | return PTR_ERR(auth); | |
326 | ||
60425a8b | 327 | enc = crypto_spawn_skcipher(&ictx->enc); |
a5079d08 SK |
328 | err = PTR_ERR(enc); |
329 | if (IS_ERR(enc)) | |
330 | goto err_free_ahash; | |
331 | ||
3a2d4fb5 | 332 | null = crypto_get_default_null_skcipher(); |
104880a6 HX |
333 | err = PTR_ERR(null); |
334 | if (IS_ERR(null)) | |
335 | goto err_free_skcipher; | |
336 | ||
a5079d08 SK |
337 | ctx->auth = auth; |
338 | ctx->enc = enc; | |
104880a6 | 339 | ctx->null = null; |
a5079d08 | 340 | |
03be4e45 | 341 | ctx->reqoff = 2 * crypto_ahash_digestsize(auth); |
a5079d08 | 342 | |
104880a6 HX |
343 | crypto_aead_set_reqsize( |
344 | tfm, | |
6650d09b HX |
345 | sizeof(struct authenc_esn_request_ctx) + |
346 | ctx->reqoff + | |
347 | max_t(unsigned int, | |
e75445a8 HX |
348 | crypto_ahash_reqsize(auth) + |
349 | sizeof(struct ahash_request), | |
350 | sizeof(struct skcipher_request) + | |
351 | crypto_skcipher_reqsize(enc))); | |
a5079d08 SK |
352 | |
353 | return 0; | |
354 | ||
104880a6 | 355 | err_free_skcipher: |
e75445a8 | 356 | crypto_free_skcipher(enc); |
a5079d08 SK |
357 | err_free_ahash: |
358 | crypto_free_ahash(auth); | |
359 | return err; | |
360 | } | |
361 | ||
104880a6 | 362 | static void crypto_authenc_esn_exit_tfm(struct crypto_aead *tfm) |
a5079d08 | 363 | { |
104880a6 | 364 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); |
a5079d08 SK |
365 | |
366 | crypto_free_ahash(ctx->auth); | |
e75445a8 | 367 | crypto_free_skcipher(ctx->enc); |
3a2d4fb5 | 368 | crypto_put_default_null_skcipher(); |
104880a6 HX |
369 | } |
370 | ||
371 | static void crypto_authenc_esn_free(struct aead_instance *inst) | |
372 | { | |
373 | struct authenc_esn_instance_ctx *ctx = aead_instance_ctx(inst); | |
374 | ||
375 | crypto_drop_skcipher(&ctx->enc); | |
376 | crypto_drop_ahash(&ctx->auth); | |
377 | kfree(inst); | |
a5079d08 SK |
378 | } |
379 | ||
104880a6 HX |
380 | static int crypto_authenc_esn_create(struct crypto_template *tmpl, |
381 | struct rtattr **tb) | |
a5079d08 | 382 | { |
b9f76ddd | 383 | u32 mask; |
104880a6 | 384 | struct aead_instance *inst; |
37073882 | 385 | struct authenc_esn_instance_ctx *ctx; |
24a285ce | 386 | struct skcipher_alg_common *enc; |
a5079d08 SK |
387 | struct hash_alg_common *auth; |
388 | struct crypto_alg *auth_base; | |
a5079d08 SK |
389 | int err; |
390 | ||
7bcb2c99 EB |
391 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask); |
392 | if (err) | |
393 | return err; | |
b9f76ddd | 394 | |
a5079d08 | 395 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
a5079d08 | 396 | if (!inst) |
37073882 | 397 | return -ENOMEM; |
104880a6 | 398 | ctx = aead_instance_ctx(inst); |
a5079d08 | 399 | |
37073882 EB |
400 | err = crypto_grab_ahash(&ctx->auth, aead_crypto_instance(inst), |
401 | crypto_attr_alg_name(tb[1]), 0, mask); | |
a5079d08 SK |
402 | if (err) |
403 | goto err_free_inst; | |
37073882 EB |
404 | auth = crypto_spawn_ahash_alg(&ctx->auth); |
405 | auth_base = &auth->base; | |
a5079d08 | 406 | |
b9f76ddd | 407 | err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst), |
37073882 | 408 | crypto_attr_alg_name(tb[2]), 0, mask); |
a5079d08 | 409 | if (err) |
37073882 | 410 | goto err_free_inst; |
24a285ce | 411 | enc = crypto_spawn_skcipher_alg_common(&ctx->enc); |
a5079d08 SK |
412 | |
413 | err = -ENAMETOOLONG; | |
104880a6 HX |
414 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
415 | "authencesn(%s,%s)", auth_base->cra_name, | |
e75445a8 | 416 | enc->base.cra_name) >= CRYPTO_MAX_ALG_NAME) |
37073882 | 417 | goto err_free_inst; |
a5079d08 | 418 | |
104880a6 | 419 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
a5079d08 | 420 | "authencesn(%s,%s)", auth_base->cra_driver_name, |
e75445a8 | 421 | enc->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
37073882 | 422 | goto err_free_inst; |
a5079d08 | 423 | |
e75445a8 | 424 | inst->alg.base.cra_priority = enc->base.cra_priority * 10 + |
104880a6 | 425 | auth_base->cra_priority; |
e75445a8 | 426 | inst->alg.base.cra_blocksize = enc->base.cra_blocksize; |
03be4e45 | 427 | inst->alg.base.cra_alignmask = enc->base.cra_alignmask; |
104880a6 HX |
428 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx); |
429 | ||
24a285ce HX |
430 | inst->alg.ivsize = enc->ivsize; |
431 | inst->alg.chunksize = enc->chunksize; | |
104880a6 | 432 | inst->alg.maxauthsize = auth->digestsize; |
a5079d08 | 433 | |
104880a6 HX |
434 | inst->alg.init = crypto_authenc_esn_init_tfm; |
435 | inst->alg.exit = crypto_authenc_esn_exit_tfm; | |
a5079d08 | 436 | |
104880a6 HX |
437 | inst->alg.setkey = crypto_authenc_esn_setkey; |
438 | inst->alg.setauthsize = crypto_authenc_esn_setauthsize; | |
439 | inst->alg.encrypt = crypto_authenc_esn_encrypt; | |
440 | inst->alg.decrypt = crypto_authenc_esn_decrypt; | |
a5079d08 | 441 | |
d1dc4df1 | 442 | inst->free = crypto_authenc_esn_free; |
a5079d08 | 443 | |
104880a6 | 444 | err = aead_register_instance(tmpl, inst); |
37073882 | 445 | if (err) { |
a5079d08 | 446 | err_free_inst: |
37073882 EB |
447 | crypto_authenc_esn_free(inst); |
448 | } | |
449 | return err; | |
a5079d08 SK |
450 | } |
451 | ||
a5079d08 SK |
452 | static struct crypto_template crypto_authenc_esn_tmpl = { |
453 | .name = "authencesn", | |
104880a6 | 454 | .create = crypto_authenc_esn_create, |
a5079d08 SK |
455 | .module = THIS_MODULE, |
456 | }; | |
457 | ||
458 | static int __init crypto_authenc_esn_module_init(void) | |
459 | { | |
460 | return crypto_register_template(&crypto_authenc_esn_tmpl); | |
461 | } | |
462 | ||
463 | static void __exit crypto_authenc_esn_module_exit(void) | |
464 | { | |
465 | crypto_unregister_template(&crypto_authenc_esn_tmpl); | |
466 | } | |
467 | ||
c4741b23 | 468 | subsys_initcall(crypto_authenc_esn_module_init); |
a5079d08 SK |
469 | module_exit(crypto_authenc_esn_module_exit); |
470 | ||
471 | MODULE_LICENSE("GPL"); | |
472 | MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>"); | |
473 | MODULE_DESCRIPTION("AEAD wrapper for IPsec with extended sequence numbers"); | |
4943ba16 | 474 | MODULE_ALIAS_CRYPTO("authencesn"); |