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 SK |
89 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
90 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); | |
91 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
104880a6 HX |
92 | struct crypto_ahash *auth = ctx->auth; |
93 | u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail, | |
94 | crypto_ahash_alignmask(auth) + 1); | |
95 | unsigned int authsize = crypto_aead_authsize(authenc_esn); | |
96 | unsigned int assoclen = req->assoclen; | |
97 | unsigned int cryptlen = req->cryptlen; | |
98 | struct scatterlist *dst = req->dst; | |
99 | u32 tmp[2]; | |
a5079d08 | 100 | |
104880a6 HX |
101 | /* Move high-order bits of sequence number back. */ |
102 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); | |
103 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); | |
104 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); | |
a5079d08 | 105 | |
104880a6 HX |
106 | scatterwalk_map_and_copy(hash, dst, assoclen + cryptlen, authsize, 1); |
107 | return 0; | |
a5079d08 SK |
108 | } |
109 | ||
255e48eb | 110 | static void authenc_esn_geniv_ahash_done(void *data, int err) |
a5079d08 | 111 | { |
255e48eb | 112 | struct aead_request *req = data; |
a5079d08 | 113 | |
104880a6 | 114 | err = err ?: crypto_authenc_esn_genicv_tail(req, 0); |
a5079d08 SK |
115 | aead_request_complete(req, err); |
116 | } | |
117 | ||
104880a6 HX |
118 | static int crypto_authenc_esn_genicv(struct aead_request *req, |
119 | unsigned int flags) | |
a5079d08 | 120 | { |
a5079d08 | 121 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
a5079d08 | 122 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); |
a5079d08 | 123 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
104880a6 HX |
124 | struct crypto_ahash *auth = ctx->auth; |
125 | u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail, | |
126 | crypto_ahash_alignmask(auth) + 1); | |
a5079d08 | 127 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); |
104880a6 HX |
128 | unsigned int authsize = crypto_aead_authsize(authenc_esn); |
129 | unsigned int assoclen = req->assoclen; | |
a5079d08 | 130 | unsigned int cryptlen = req->cryptlen; |
104880a6 HX |
131 | struct scatterlist *dst = req->dst; |
132 | u32 tmp[2]; | |
a5079d08 | 133 | |
104880a6 HX |
134 | if (!authsize) |
135 | return 0; | |
a5079d08 | 136 | |
104880a6 HX |
137 | /* Move high-order bits of sequence number to the end. */ |
138 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); | |
139 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); | |
140 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); | |
a5079d08 | 141 | |
104880a6 HX |
142 | sg_init_table(areq_ctx->dst, 2); |
143 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); | |
a5079d08 | 144 | |
104880a6 HX |
145 | ahash_request_set_tfm(ahreq, auth); |
146 | ahash_request_set_crypt(ahreq, dst, hash, assoclen + cryptlen); | |
147 | ahash_request_set_callback(ahreq, flags, | |
148 | authenc_esn_geniv_ahash_done, req); | |
a5079d08 | 149 | |
104880a6 HX |
150 | return crypto_ahash_digest(ahreq) ?: |
151 | crypto_authenc_esn_genicv_tail(req, aead_request_flags(req)); | |
a5079d08 SK |
152 | } |
153 | ||
154 | ||
255e48eb | 155 | static void crypto_authenc_esn_encrypt_done(void *data, int err) |
a5079d08 | 156 | { |
255e48eb | 157 | struct aead_request *areq = data; |
a5079d08 | 158 | |
104880a6 HX |
159 | if (!err) |
160 | err = crypto_authenc_esn_genicv(areq, 0); | |
a5079d08 | 161 | |
104880a6 | 162 | authenc_esn_request_complete(areq, err); |
a5079d08 SK |
163 | } |
164 | ||
104880a6 | 165 | static int crypto_authenc_esn_copy(struct aead_request *req, unsigned int len) |
a5079d08 SK |
166 | { |
167 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
168 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); | |
8d605398 | 169 | SYNC_SKCIPHER_REQUEST_ON_STACK(skreq, ctx->null); |
a5079d08 | 170 | |
8d605398 | 171 | skcipher_request_set_sync_tfm(skreq, ctx->null); |
e75445a8 HX |
172 | skcipher_request_set_callback(skreq, aead_request_flags(req), |
173 | NULL, NULL); | |
174 | skcipher_request_set_crypt(skreq, req->src, req->dst, len, NULL); | |
175 | ||
176 | return crypto_skcipher_encrypt(skreq); | |
a5079d08 SK |
177 | } |
178 | ||
104880a6 | 179 | static int crypto_authenc_esn_encrypt(struct aead_request *req) |
a5079d08 SK |
180 | { |
181 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
182 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
104880a6 | 183 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
e75445a8 HX |
184 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
185 | ctx->reqoff); | |
186 | struct crypto_skcipher *enc = ctx->enc; | |
104880a6 | 187 | unsigned int assoclen = req->assoclen; |
a5079d08 | 188 | unsigned int cryptlen = req->cryptlen; |
104880a6 HX |
189 | struct scatterlist *src, *dst; |
190 | int err; | |
a5079d08 | 191 | |
104880a6 HX |
192 | sg_init_table(areq_ctx->src, 2); |
193 | src = scatterwalk_ffwd(areq_ctx->src, req->src, assoclen); | |
194 | dst = src; | |
a5079d08 | 195 | |
104880a6 HX |
196 | if (req->src != req->dst) { |
197 | err = crypto_authenc_esn_copy(req, assoclen); | |
198 | if (err) | |
199 | return err; | |
a5079d08 | 200 | |
104880a6 HX |
201 | sg_init_table(areq_ctx->dst, 2); |
202 | dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, assoclen); | |
a5079d08 SK |
203 | } |
204 | ||
e75445a8 HX |
205 | skcipher_request_set_tfm(skreq, enc); |
206 | skcipher_request_set_callback(skreq, aead_request_flags(req), | |
207 | crypto_authenc_esn_encrypt_done, req); | |
208 | skcipher_request_set_crypt(skreq, src, dst, cryptlen, req->iv); | |
a5079d08 | 209 | |
e75445a8 | 210 | err = crypto_skcipher_encrypt(skreq); |
a5079d08 SK |
211 | if (err) |
212 | return err; | |
213 | ||
104880a6 | 214 | return crypto_authenc_esn_genicv(req, aead_request_flags(req)); |
a5079d08 SK |
215 | } |
216 | ||
104880a6 HX |
217 | static int crypto_authenc_esn_decrypt_tail(struct aead_request *req, |
218 | unsigned int flags) | |
a5079d08 | 219 | { |
104880a6 HX |
220 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); |
221 | unsigned int authsize = crypto_aead_authsize(authenc_esn); | |
222 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
223 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); | |
e75445a8 HX |
224 | struct skcipher_request *skreq = (void *)(areq_ctx->tail + |
225 | ctx->reqoff); | |
104880a6 HX |
226 | struct crypto_ahash *auth = ctx->auth; |
227 | u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail, | |
228 | crypto_ahash_alignmask(auth) + 1); | |
229 | unsigned int cryptlen = req->cryptlen - authsize; | |
230 | unsigned int assoclen = req->assoclen; | |
231 | struct scatterlist *dst = req->dst; | |
232 | u8 *ihash = ohash + crypto_ahash_digestsize(auth); | |
233 | u32 tmp[2]; | |
a5079d08 | 234 | |
41cdf7a4 HX |
235 | if (!authsize) |
236 | goto decrypt; | |
237 | ||
104880a6 HX |
238 | /* Move high-order bits of sequence number back. */ |
239 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); | |
240 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); | |
241 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); | |
a5079d08 | 242 | |
104880a6 HX |
243 | if (crypto_memneq(ihash, ohash, authsize)) |
244 | return -EBADMSG; | |
a5079d08 | 245 | |
41cdf7a4 HX |
246 | decrypt: |
247 | ||
104880a6 HX |
248 | sg_init_table(areq_ctx->dst, 2); |
249 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, assoclen); | |
a5079d08 | 250 | |
e75445a8 HX |
251 | skcipher_request_set_tfm(skreq, ctx->enc); |
252 | skcipher_request_set_callback(skreq, flags, | |
253 | req->base.complete, req->base.data); | |
254 | skcipher_request_set_crypt(skreq, dst, dst, cryptlen, req->iv); | |
a5079d08 | 255 | |
e75445a8 | 256 | return crypto_skcipher_decrypt(skreq); |
a5079d08 SK |
257 | } |
258 | ||
255e48eb | 259 | static void authenc_esn_verify_ahash_done(void *data, int err) |
a5079d08 | 260 | { |
255e48eb | 261 | struct aead_request *req = data; |
a5079d08 | 262 | |
104880a6 | 263 | err = err ?: crypto_authenc_esn_decrypt_tail(req, 0); |
a7773363 | 264 | authenc_esn_request_complete(req, err); |
a5079d08 SK |
265 | } |
266 | ||
104880a6 | 267 | static int crypto_authenc_esn_decrypt(struct aead_request *req) |
a5079d08 SK |
268 | { |
269 | struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); | |
270 | struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); | |
104880a6 HX |
271 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); |
272 | struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); | |
273 | unsigned int authsize = crypto_aead_authsize(authenc_esn); | |
274 | struct crypto_ahash *auth = ctx->auth; | |
275 | u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail, | |
276 | crypto_ahash_alignmask(auth) + 1); | |
277 | unsigned int assoclen = req->assoclen; | |
278 | unsigned int cryptlen = req->cryptlen; | |
279 | u8 *ihash = ohash + crypto_ahash_digestsize(auth); | |
280 | struct scatterlist *dst = req->dst; | |
281 | u32 tmp[2]; | |
282 | int err; | |
a5079d08 | 283 | |
104880a6 | 284 | cryptlen -= authsize; |
a5079d08 | 285 | |
104880a6 HX |
286 | if (req->src != dst) { |
287 | err = crypto_authenc_esn_copy(req, assoclen + cryptlen); | |
288 | if (err) | |
289 | return err; | |
290 | } | |
a5079d08 | 291 | |
104880a6 HX |
292 | scatterwalk_map_and_copy(ihash, req->src, assoclen + cryptlen, |
293 | authsize, 0); | |
a5079d08 | 294 | |
104880a6 HX |
295 | if (!authsize) |
296 | goto tail; | |
a5079d08 | 297 | |
104880a6 HX |
298 | /* Move high-order bits of sequence number to the end. */ |
299 | scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); | |
300 | scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); | |
301 | scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); | |
a5079d08 | 302 | |
104880a6 HX |
303 | sg_init_table(areq_ctx->dst, 2); |
304 | dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); | |
a5079d08 | 305 | |
104880a6 HX |
306 | ahash_request_set_tfm(ahreq, auth); |
307 | ahash_request_set_crypt(ahreq, dst, ohash, assoclen + cryptlen); | |
308 | ahash_request_set_callback(ahreq, aead_request_flags(req), | |
309 | authenc_esn_verify_ahash_done, req); | |
a5079d08 | 310 | |
104880a6 | 311 | err = crypto_ahash_digest(ahreq); |
a5079d08 SK |
312 | if (err) |
313 | return err; | |
314 | ||
104880a6 HX |
315 | tail: |
316 | return crypto_authenc_esn_decrypt_tail(req, aead_request_flags(req)); | |
a5079d08 SK |
317 | } |
318 | ||
104880a6 | 319 | static int crypto_authenc_esn_init_tfm(struct crypto_aead *tfm) |
a5079d08 | 320 | { |
104880a6 HX |
321 | struct aead_instance *inst = aead_alg_instance(tfm); |
322 | struct authenc_esn_instance_ctx *ictx = aead_instance_ctx(inst); | |
323 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); | |
a5079d08 | 324 | struct crypto_ahash *auth; |
e75445a8 | 325 | struct crypto_skcipher *enc; |
8d605398 | 326 | struct crypto_sync_skcipher *null; |
a5079d08 SK |
327 | int err; |
328 | ||
329 | auth = crypto_spawn_ahash(&ictx->auth); | |
330 | if (IS_ERR(auth)) | |
331 | return PTR_ERR(auth); | |
332 | ||
60425a8b | 333 | enc = crypto_spawn_skcipher(&ictx->enc); |
a5079d08 SK |
334 | err = PTR_ERR(enc); |
335 | if (IS_ERR(enc)) | |
336 | goto err_free_ahash; | |
337 | ||
3a2d4fb5 | 338 | null = crypto_get_default_null_skcipher(); |
104880a6 HX |
339 | err = PTR_ERR(null); |
340 | if (IS_ERR(null)) | |
341 | goto err_free_skcipher; | |
342 | ||
a5079d08 SK |
343 | ctx->auth = auth; |
344 | ctx->enc = enc; | |
104880a6 | 345 | ctx->null = null; |
a5079d08 | 346 | |
104880a6 HX |
347 | ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth), |
348 | crypto_ahash_alignmask(auth) + 1); | |
a5079d08 | 349 | |
104880a6 HX |
350 | crypto_aead_set_reqsize( |
351 | tfm, | |
6650d09b HX |
352 | sizeof(struct authenc_esn_request_ctx) + |
353 | ctx->reqoff + | |
354 | max_t(unsigned int, | |
e75445a8 HX |
355 | crypto_ahash_reqsize(auth) + |
356 | sizeof(struct ahash_request), | |
357 | sizeof(struct skcipher_request) + | |
358 | crypto_skcipher_reqsize(enc))); | |
a5079d08 SK |
359 | |
360 | return 0; | |
361 | ||
104880a6 | 362 | err_free_skcipher: |
e75445a8 | 363 | crypto_free_skcipher(enc); |
a5079d08 SK |
364 | err_free_ahash: |
365 | crypto_free_ahash(auth); | |
366 | return err; | |
367 | } | |
368 | ||
104880a6 | 369 | static void crypto_authenc_esn_exit_tfm(struct crypto_aead *tfm) |
a5079d08 | 370 | { |
104880a6 | 371 | struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); |
a5079d08 SK |
372 | |
373 | crypto_free_ahash(ctx->auth); | |
e75445a8 | 374 | crypto_free_skcipher(ctx->enc); |
3a2d4fb5 | 375 | crypto_put_default_null_skcipher(); |
104880a6 HX |
376 | } |
377 | ||
378 | static void crypto_authenc_esn_free(struct aead_instance *inst) | |
379 | { | |
380 | struct authenc_esn_instance_ctx *ctx = aead_instance_ctx(inst); | |
381 | ||
382 | crypto_drop_skcipher(&ctx->enc); | |
383 | crypto_drop_ahash(&ctx->auth); | |
384 | kfree(inst); | |
a5079d08 SK |
385 | } |
386 | ||
104880a6 HX |
387 | static int crypto_authenc_esn_create(struct crypto_template *tmpl, |
388 | struct rtattr **tb) | |
a5079d08 | 389 | { |
b9f76ddd | 390 | u32 mask; |
104880a6 | 391 | struct aead_instance *inst; |
37073882 | 392 | struct authenc_esn_instance_ctx *ctx; |
a5079d08 SK |
393 | struct hash_alg_common *auth; |
394 | struct crypto_alg *auth_base; | |
e75445a8 | 395 | struct skcipher_alg *enc; |
a5079d08 SK |
396 | int err; |
397 | ||
7bcb2c99 EB |
398 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask); |
399 | if (err) | |
400 | return err; | |
b9f76ddd | 401 | |
a5079d08 | 402 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
a5079d08 | 403 | if (!inst) |
37073882 | 404 | return -ENOMEM; |
104880a6 | 405 | ctx = aead_instance_ctx(inst); |
a5079d08 | 406 | |
37073882 EB |
407 | err = crypto_grab_ahash(&ctx->auth, aead_crypto_instance(inst), |
408 | crypto_attr_alg_name(tb[1]), 0, mask); | |
a5079d08 SK |
409 | if (err) |
410 | goto err_free_inst; | |
37073882 EB |
411 | auth = crypto_spawn_ahash_alg(&ctx->auth); |
412 | auth_base = &auth->base; | |
a5079d08 | 413 | |
b9f76ddd | 414 | err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst), |
37073882 | 415 | crypto_attr_alg_name(tb[2]), 0, mask); |
a5079d08 | 416 | if (err) |
37073882 | 417 | goto err_free_inst; |
e75445a8 | 418 | enc = crypto_spawn_skcipher_alg(&ctx->enc); |
a5079d08 SK |
419 | |
420 | err = -ENAMETOOLONG; | |
104880a6 HX |
421 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
422 | "authencesn(%s,%s)", auth_base->cra_name, | |
e75445a8 | 423 | enc->base.cra_name) >= CRYPTO_MAX_ALG_NAME) |
37073882 | 424 | goto err_free_inst; |
a5079d08 | 425 | |
104880a6 | 426 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
a5079d08 | 427 | "authencesn(%s,%s)", auth_base->cra_driver_name, |
e75445a8 | 428 | enc->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
37073882 | 429 | goto err_free_inst; |
a5079d08 | 430 | |
e75445a8 | 431 | inst->alg.base.cra_priority = enc->base.cra_priority * 10 + |
104880a6 | 432 | auth_base->cra_priority; |
e75445a8 | 433 | inst->alg.base.cra_blocksize = enc->base.cra_blocksize; |
104880a6 | 434 | inst->alg.base.cra_alignmask = auth_base->cra_alignmask | |
e75445a8 | 435 | enc->base.cra_alignmask; |
104880a6 HX |
436 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx); |
437 | ||
e75445a8 HX |
438 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(enc); |
439 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(enc); | |
104880a6 | 440 | inst->alg.maxauthsize = auth->digestsize; |
a5079d08 | 441 | |
104880a6 HX |
442 | inst->alg.init = crypto_authenc_esn_init_tfm; |
443 | inst->alg.exit = crypto_authenc_esn_exit_tfm; | |
a5079d08 | 444 | |
104880a6 HX |
445 | inst->alg.setkey = crypto_authenc_esn_setkey; |
446 | inst->alg.setauthsize = crypto_authenc_esn_setauthsize; | |
447 | inst->alg.encrypt = crypto_authenc_esn_encrypt; | |
448 | inst->alg.decrypt = crypto_authenc_esn_decrypt; | |
a5079d08 | 449 | |
d1dc4df1 | 450 | inst->free = crypto_authenc_esn_free; |
a5079d08 | 451 | |
104880a6 | 452 | err = aead_register_instance(tmpl, inst); |
37073882 | 453 | if (err) { |
a5079d08 | 454 | err_free_inst: |
37073882 EB |
455 | crypto_authenc_esn_free(inst); |
456 | } | |
457 | return err; | |
a5079d08 SK |
458 | } |
459 | ||
a5079d08 SK |
460 | static struct crypto_template crypto_authenc_esn_tmpl = { |
461 | .name = "authencesn", | |
104880a6 | 462 | .create = crypto_authenc_esn_create, |
a5079d08 SK |
463 | .module = THIS_MODULE, |
464 | }; | |
465 | ||
466 | static int __init crypto_authenc_esn_module_init(void) | |
467 | { | |
468 | return crypto_register_template(&crypto_authenc_esn_tmpl); | |
469 | } | |
470 | ||
471 | static void __exit crypto_authenc_esn_module_exit(void) | |
472 | { | |
473 | crypto_unregister_template(&crypto_authenc_esn_tmpl); | |
474 | } | |
475 | ||
c4741b23 | 476 | subsys_initcall(crypto_authenc_esn_module_init); |
a5079d08 SK |
477 | module_exit(crypto_authenc_esn_module_exit); |
478 | ||
479 | MODULE_LICENSE("GPL"); | |
480 | MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>"); | |
481 | MODULE_DESCRIPTION("AEAD wrapper for IPsec with extended sequence numbers"); | |
4943ba16 | 482 | MODULE_ALIAS_CRYPTO("authencesn"); |