Commit | Line | Data |
---|---|---|
4a49b499 JL |
1 | /* |
2 | * CCM: Counter with CBC-MAC | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com> | |
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 | #include <crypto/internal/aead.h> | |
f15f05b0 | 14 | #include <crypto/internal/hash.h> |
4a49b499 JL |
15 | #include <crypto/internal/skcipher.h> |
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/slab.h> | |
22 | ||
23 | #include "internal.h" | |
24 | ||
25 | struct ccm_instance_ctx { | |
26 | struct crypto_skcipher_spawn ctr; | |
f15f05b0 | 27 | struct crypto_ahash_spawn mac; |
4a49b499 JL |
28 | }; |
29 | ||
30 | struct crypto_ccm_ctx { | |
f15f05b0 | 31 | struct crypto_ahash *mac; |
464b93a3 | 32 | struct crypto_skcipher *ctr; |
4a49b499 JL |
33 | }; |
34 | ||
35 | struct crypto_rfc4309_ctx { | |
36 | struct crypto_aead *child; | |
37 | u8 nonce[3]; | |
38 | }; | |
39 | ||
81c4c35e HX |
40 | struct crypto_rfc4309_req_ctx { |
41 | struct scatterlist src[3]; | |
42 | struct scatterlist dst[3]; | |
43 | struct aead_request subreq; | |
44 | }; | |
45 | ||
4a49b499 JL |
46 | struct crypto_ccm_req_priv_ctx { |
47 | u8 odata[16]; | |
3b30460c | 48 | u8 idata[16]; |
4a49b499 | 49 | u8 auth_tag[16]; |
4a49b499 | 50 | u32 flags; |
81c4c35e HX |
51 | struct scatterlist src[3]; |
52 | struct scatterlist dst[3]; | |
ebf533ad AB |
53 | union { |
54 | struct ahash_request ahreq; | |
55 | struct skcipher_request skreq; | |
56 | }; | |
4a49b499 JL |
57 | }; |
58 | ||
f15f05b0 AB |
59 | struct cbcmac_tfm_ctx { |
60 | struct crypto_cipher *child; | |
61 | }; | |
62 | ||
63 | struct cbcmac_desc_ctx { | |
64 | unsigned int len; | |
f15f05b0 AB |
65 | }; |
66 | ||
4a49b499 JL |
67 | static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx( |
68 | struct aead_request *req) | |
69 | { | |
70 | unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req)); | |
71 | ||
72 | return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1); | |
73 | } | |
74 | ||
75 | static int set_msg_len(u8 *block, unsigned int msglen, int csize) | |
76 | { | |
77 | __be32 data; | |
78 | ||
79 | memset(block, 0, csize); | |
80 | block += csize; | |
81 | ||
82 | if (csize >= 4) | |
83 | csize = 4; | |
84 | else if (msglen > (1 << (8 * csize))) | |
85 | return -EOVERFLOW; | |
86 | ||
87 | data = cpu_to_be32(msglen); | |
88 | memcpy(block - csize, (u8 *)&data + 4 - csize, csize); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key, | |
94 | unsigned int keylen) | |
95 | { | |
96 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
464b93a3 | 97 | struct crypto_skcipher *ctr = ctx->ctr; |
f15f05b0 | 98 | struct crypto_ahash *mac = ctx->mac; |
4a49b499 JL |
99 | int err = 0; |
100 | ||
464b93a3 HX |
101 | crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK); |
102 | crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) & | |
103 | CRYPTO_TFM_REQ_MASK); | |
104 | err = crypto_skcipher_setkey(ctr, key, keylen); | |
105 | crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) & | |
4a49b499 JL |
106 | CRYPTO_TFM_RES_MASK); |
107 | if (err) | |
108 | goto out; | |
109 | ||
f15f05b0 AB |
110 | crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK); |
111 | crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) & | |
4a49b499 | 112 | CRYPTO_TFM_REQ_MASK); |
f15f05b0 AB |
113 | err = crypto_ahash_setkey(mac, key, keylen); |
114 | crypto_aead_set_flags(aead, crypto_ahash_get_flags(mac) & | |
4a49b499 JL |
115 | CRYPTO_TFM_RES_MASK); |
116 | ||
117 | out: | |
118 | return err; | |
119 | } | |
120 | ||
121 | static int crypto_ccm_setauthsize(struct crypto_aead *tfm, | |
122 | unsigned int authsize) | |
123 | { | |
124 | switch (authsize) { | |
125 | case 4: | |
126 | case 6: | |
127 | case 8: | |
128 | case 10: | |
129 | case 12: | |
130 | case 14: | |
131 | case 16: | |
132 | break; | |
133 | default: | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int format_input(u8 *info, struct aead_request *req, | |
141 | unsigned int cryptlen) | |
142 | { | |
143 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
144 | unsigned int lp = req->iv[0]; | |
145 | unsigned int l = lp + 1; | |
146 | unsigned int m; | |
147 | ||
148 | m = crypto_aead_authsize(aead); | |
149 | ||
150 | memcpy(info, req->iv, 16); | |
151 | ||
152 | /* format control info per RFC 3610 and | |
153 | * NIST Special Publication 800-38C | |
154 | */ | |
155 | *info |= (8 * ((m - 2) / 2)); | |
156 | if (req->assoclen) | |
157 | *info |= 64; | |
158 | ||
159 | return set_msg_len(info + 16 - l, cryptlen, l); | |
160 | } | |
161 | ||
162 | static int format_adata(u8 *adata, unsigned int a) | |
163 | { | |
164 | int len = 0; | |
165 | ||
166 | /* add control info for associated data | |
167 | * RFC 3610 and NIST Special Publication 800-38C | |
168 | */ | |
169 | if (a < 65280) { | |
170 | *(__be16 *)adata = cpu_to_be16(a); | |
171 | len = 2; | |
172 | } else { | |
173 | *(__be16 *)adata = cpu_to_be16(0xfffe); | |
174 | *(__be32 *)&adata[2] = cpu_to_be32(a); | |
175 | len = 6; | |
176 | } | |
177 | ||
178 | return len; | |
179 | } | |
180 | ||
4a49b499 JL |
181 | static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain, |
182 | unsigned int cryptlen) | |
183 | { | |
f15f05b0 | 184 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
4a49b499 JL |
185 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
186 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
ebf533ad | 187 | struct ahash_request *ahreq = &pctx->ahreq; |
4a49b499 | 188 | unsigned int assoclen = req->assoclen; |
f15f05b0 | 189 | struct scatterlist sg[3]; |
3b30460c AB |
190 | u8 *odata = pctx->odata; |
191 | u8 *idata = pctx->idata; | |
f15f05b0 | 192 | int ilen, err; |
4a49b499 JL |
193 | |
194 | /* format control data for input */ | |
195 | err = format_input(odata, req, cryptlen); | |
196 | if (err) | |
197 | goto out; | |
198 | ||
f15f05b0 AB |
199 | sg_init_table(sg, 3); |
200 | sg_set_buf(&sg[0], odata, 16); | |
4a49b499 JL |
201 | |
202 | /* format associated data and compute into mac */ | |
203 | if (assoclen) { | |
f15f05b0 AB |
204 | ilen = format_adata(idata, assoclen); |
205 | sg_set_buf(&sg[1], idata, ilen); | |
206 | sg_chain(sg, 3, req->src); | |
516280e7 | 207 | } else { |
f15f05b0 AB |
208 | ilen = 0; |
209 | sg_chain(sg, 2, req->src); | |
4a49b499 JL |
210 | } |
211 | ||
f15f05b0 AB |
212 | ahash_request_set_tfm(ahreq, ctx->mac); |
213 | ahash_request_set_callback(ahreq, pctx->flags, NULL, NULL); | |
214 | ahash_request_set_crypt(ahreq, sg, NULL, assoclen + ilen + 16); | |
215 | err = crypto_ahash_init(ahreq); | |
216 | if (err) | |
217 | goto out; | |
218 | err = crypto_ahash_update(ahreq); | |
219 | if (err) | |
220 | goto out; | |
4a49b499 | 221 | |
f15f05b0 AB |
222 | /* we need to pad the MAC input to a round multiple of the block size */ |
223 | ilen = 16 - (assoclen + ilen) % 16; | |
224 | if (ilen < 16) { | |
225 | memset(idata, 0, ilen); | |
226 | sg_init_table(sg, 2); | |
227 | sg_set_buf(&sg[0], idata, ilen); | |
228 | if (plain) | |
229 | sg_chain(sg, 2, plain); | |
230 | plain = sg; | |
231 | cryptlen += ilen; | |
232 | } | |
233 | ||
234 | ahash_request_set_crypt(ahreq, plain, pctx->odata, cryptlen); | |
235 | err = crypto_ahash_finup(ahreq); | |
4a49b499 JL |
236 | out: |
237 | return err; | |
238 | } | |
239 | ||
240 | static void crypto_ccm_encrypt_done(struct crypto_async_request *areq, int err) | |
241 | { | |
242 | struct aead_request *req = areq->data; | |
243 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
244 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
245 | u8 *odata = pctx->odata; | |
246 | ||
247 | if (!err) | |
81c4c35e HX |
248 | scatterwalk_map_and_copy(odata, req->dst, |
249 | req->assoclen + req->cryptlen, | |
4a49b499 JL |
250 | crypto_aead_authsize(aead), 1); |
251 | aead_request_complete(req, err); | |
252 | } | |
253 | ||
254 | static inline int crypto_ccm_check_iv(const u8 *iv) | |
255 | { | |
256 | /* 2 <= L <= 8, so 1 <= L' <= 7. */ | |
257 | if (1 > iv[0] || iv[0] > 7) | |
258 | return -EINVAL; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
81c4c35e HX |
263 | static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag) |
264 | { | |
265 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
266 | struct scatterlist *sg; | |
267 | u8 *iv = req->iv; | |
268 | int err; | |
269 | ||
270 | err = crypto_ccm_check_iv(iv); | |
271 | if (err) | |
272 | return err; | |
273 | ||
274 | pctx->flags = aead_request_flags(req); | |
275 | ||
276 | /* Note: rfc 3610 and NIST 800-38C require counter of | |
277 | * zero to encrypt auth tag. | |
278 | */ | |
279 | memset(iv + 15 - iv[0], 0, iv[0] + 1); | |
280 | ||
281 | sg_init_table(pctx->src, 3); | |
282 | sg_set_buf(pctx->src, tag, 16); | |
283 | sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen); | |
284 | if (sg != pctx->src + 1) | |
285 | sg_chain(pctx->src, 2, sg); | |
286 | ||
287 | if (req->src != req->dst) { | |
288 | sg_init_table(pctx->dst, 3); | |
289 | sg_set_buf(pctx->dst, tag, 16); | |
290 | sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen); | |
291 | if (sg != pctx->dst + 1) | |
292 | sg_chain(pctx->dst, 2, sg); | |
293 | } | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
4a49b499 JL |
298 | static int crypto_ccm_encrypt(struct aead_request *req) |
299 | { | |
300 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
301 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
302 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
464b93a3 | 303 | struct skcipher_request *skreq = &pctx->skreq; |
4a49b499 JL |
304 | struct scatterlist *dst; |
305 | unsigned int cryptlen = req->cryptlen; | |
306 | u8 *odata = pctx->odata; | |
307 | u8 *iv = req->iv; | |
308 | int err; | |
309 | ||
81c4c35e | 310 | err = crypto_ccm_init_crypt(req, odata); |
4a49b499 JL |
311 | if (err) |
312 | return err; | |
313 | ||
81c4c35e | 314 | err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen); |
4a49b499 JL |
315 | if (err) |
316 | return err; | |
317 | ||
4a49b499 | 318 | dst = pctx->src; |
81c4c35e | 319 | if (req->src != req->dst) |
4a49b499 | 320 | dst = pctx->dst; |
4a49b499 | 321 | |
464b93a3 HX |
322 | skcipher_request_set_tfm(skreq, ctx->ctr); |
323 | skcipher_request_set_callback(skreq, pctx->flags, | |
324 | crypto_ccm_encrypt_done, req); | |
325 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); | |
326 | err = crypto_skcipher_encrypt(skreq); | |
4a49b499 JL |
327 | if (err) |
328 | return err; | |
329 | ||
330 | /* copy authtag to end of dst */ | |
81c4c35e | 331 | scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen, |
4a49b499 JL |
332 | crypto_aead_authsize(aead), 1); |
333 | return err; | |
334 | } | |
335 | ||
336 | static void crypto_ccm_decrypt_done(struct crypto_async_request *areq, | |
337 | int err) | |
338 | { | |
339 | struct aead_request *req = areq->data; | |
340 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
341 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
342 | unsigned int authsize = crypto_aead_authsize(aead); | |
343 | unsigned int cryptlen = req->cryptlen - authsize; | |
81c4c35e HX |
344 | struct scatterlist *dst; |
345 | ||
346 | pctx->flags = 0; | |
347 | ||
348 | dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst); | |
4a49b499 JL |
349 | |
350 | if (!err) { | |
81c4c35e | 351 | err = crypto_ccm_auth(req, dst, cryptlen); |
6bf37e5a | 352 | if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize)) |
4a49b499 JL |
353 | err = -EBADMSG; |
354 | } | |
355 | aead_request_complete(req, err); | |
356 | } | |
357 | ||
358 | static int crypto_ccm_decrypt(struct aead_request *req) | |
359 | { | |
360 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
361 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
362 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
464b93a3 | 363 | struct skcipher_request *skreq = &pctx->skreq; |
4a49b499 JL |
364 | struct scatterlist *dst; |
365 | unsigned int authsize = crypto_aead_authsize(aead); | |
366 | unsigned int cryptlen = req->cryptlen; | |
367 | u8 *authtag = pctx->auth_tag; | |
368 | u8 *odata = pctx->odata; | |
441f99c9 | 369 | u8 *iv = pctx->idata; |
4a49b499 JL |
370 | int err; |
371 | ||
4a49b499 JL |
372 | cryptlen -= authsize; |
373 | ||
81c4c35e | 374 | err = crypto_ccm_init_crypt(req, authtag); |
4a49b499 JL |
375 | if (err) |
376 | return err; | |
377 | ||
81c4c35e HX |
378 | scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen, |
379 | authsize, 0); | |
4a49b499 JL |
380 | |
381 | dst = pctx->src; | |
81c4c35e | 382 | if (req->src != req->dst) |
4a49b499 | 383 | dst = pctx->dst; |
4a49b499 | 384 | |
441f99c9 RI |
385 | memcpy(iv, req->iv, 16); |
386 | ||
464b93a3 HX |
387 | skcipher_request_set_tfm(skreq, ctx->ctr); |
388 | skcipher_request_set_callback(skreq, pctx->flags, | |
389 | crypto_ccm_decrypt_done, req); | |
390 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); | |
391 | err = crypto_skcipher_decrypt(skreq); | |
4a49b499 JL |
392 | if (err) |
393 | return err; | |
394 | ||
81c4c35e | 395 | err = crypto_ccm_auth(req, sg_next(dst), cryptlen); |
4a49b499 JL |
396 | if (err) |
397 | return err; | |
398 | ||
399 | /* verify */ | |
6bf37e5a | 400 | if (crypto_memneq(authtag, odata, authsize)) |
4a49b499 JL |
401 | return -EBADMSG; |
402 | ||
403 | return err; | |
404 | } | |
405 | ||
81c4c35e | 406 | static int crypto_ccm_init_tfm(struct crypto_aead *tfm) |
4a49b499 | 407 | { |
81c4c35e HX |
408 | struct aead_instance *inst = aead_alg_instance(tfm); |
409 | struct ccm_instance_ctx *ictx = aead_instance_ctx(inst); | |
410 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); | |
f15f05b0 | 411 | struct crypto_ahash *mac; |
464b93a3 | 412 | struct crypto_skcipher *ctr; |
4a49b499 JL |
413 | unsigned long align; |
414 | int err; | |
415 | ||
f15f05b0 AB |
416 | mac = crypto_spawn_ahash(&ictx->mac); |
417 | if (IS_ERR(mac)) | |
418 | return PTR_ERR(mac); | |
4a49b499 | 419 | |
60425a8b | 420 | ctr = crypto_spawn_skcipher(&ictx->ctr); |
4a49b499 JL |
421 | err = PTR_ERR(ctr); |
422 | if (IS_ERR(ctr)) | |
f15f05b0 | 423 | goto err_free_mac; |
4a49b499 | 424 | |
f15f05b0 | 425 | ctx->mac = mac; |
4a49b499 JL |
426 | ctx->ctr = ctr; |
427 | ||
81c4c35e | 428 | align = crypto_aead_alignmask(tfm); |
4a49b499 | 429 | align &= ~(crypto_tfm_ctx_alignment() - 1); |
81c4c35e HX |
430 | crypto_aead_set_reqsize( |
431 | tfm, | |
2c221ad3 | 432 | align + sizeof(struct crypto_ccm_req_priv_ctx) + |
ebf533ad | 433 | max(crypto_ahash_reqsize(mac), crypto_skcipher_reqsize(ctr))); |
4a49b499 JL |
434 | |
435 | return 0; | |
436 | ||
f15f05b0 AB |
437 | err_free_mac: |
438 | crypto_free_ahash(mac); | |
4a49b499 JL |
439 | return err; |
440 | } | |
441 | ||
81c4c35e | 442 | static void crypto_ccm_exit_tfm(struct crypto_aead *tfm) |
4a49b499 | 443 | { |
81c4c35e | 444 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); |
4a49b499 | 445 | |
f15f05b0 | 446 | crypto_free_ahash(ctx->mac); |
464b93a3 | 447 | crypto_free_skcipher(ctx->ctr); |
4a49b499 JL |
448 | } |
449 | ||
81c4c35e HX |
450 | static void crypto_ccm_free(struct aead_instance *inst) |
451 | { | |
452 | struct ccm_instance_ctx *ctx = aead_instance_ctx(inst); | |
453 | ||
f15f05b0 | 454 | crypto_drop_ahash(&ctx->mac); |
81c4c35e HX |
455 | crypto_drop_skcipher(&ctx->ctr); |
456 | kfree(inst); | |
457 | } | |
458 | ||
459 | static int crypto_ccm_create_common(struct crypto_template *tmpl, | |
460 | struct rtattr **tb, | |
81c4c35e | 461 | const char *ctr_name, |
f15f05b0 | 462 | const char *mac_name) |
4a49b499 JL |
463 | { |
464 | struct crypto_attr_type *algt; | |
81c4c35e | 465 | struct aead_instance *inst; |
464b93a3 | 466 | struct skcipher_alg *ctr; |
f15f05b0 AB |
467 | struct crypto_alg *mac_alg; |
468 | struct hash_alg_common *mac; | |
4a49b499 JL |
469 | struct ccm_instance_ctx *ictx; |
470 | int err; | |
471 | ||
472 | algt = crypto_get_attr_type(tb); | |
4a49b499 | 473 | if (IS_ERR(algt)) |
81c4c35e | 474 | return PTR_ERR(algt); |
4a49b499 | 475 | |
5e4b8c1f | 476 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
81c4c35e | 477 | return -EINVAL; |
4a49b499 | 478 | |
f15f05b0 AB |
479 | mac_alg = crypto_find_alg(mac_name, &crypto_ahash_type, |
480 | CRYPTO_ALG_TYPE_HASH, | |
481 | CRYPTO_ALG_TYPE_AHASH_MASK | | |
482 | CRYPTO_ALG_ASYNC); | |
483 | if (IS_ERR(mac_alg)) | |
484 | return PTR_ERR(mac_alg); | |
4a49b499 | 485 | |
f15f05b0 | 486 | mac = __crypto_hash_alg_common(mac_alg); |
4a49b499 | 487 | err = -EINVAL; |
6a1faa4a EB |
488 | if (strncmp(mac->base.cra_name, "cbcmac(", 7) != 0 || |
489 | mac->digestsize != 16) | |
f15f05b0 | 490 | goto out_put_mac; |
4a49b499 JL |
491 | |
492 | inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL); | |
493 | err = -ENOMEM; | |
494 | if (!inst) | |
f15f05b0 | 495 | goto out_put_mac; |
4a49b499 | 496 | |
81c4c35e | 497 | ictx = aead_instance_ctx(inst); |
f15f05b0 AB |
498 | err = crypto_init_ahash_spawn(&ictx->mac, mac, |
499 | aead_crypto_instance(inst)); | |
4a49b499 JL |
500 | if (err) |
501 | goto err_free_inst; | |
502 | ||
81c4c35e | 503 | crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst)); |
a35528ec EB |
504 | err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0, |
505 | crypto_requires_sync(algt->type, | |
506 | algt->mask)); | |
4a49b499 | 507 | if (err) |
f15f05b0 | 508 | goto err_drop_mac; |
4a49b499 | 509 | |
464b93a3 | 510 | ctr = crypto_spawn_skcipher_alg(&ictx->ctr); |
4a49b499 | 511 | |
6a1faa4a | 512 | /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */ |
4a49b499 | 513 | err = -EINVAL; |
6a1faa4a EB |
514 | if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 || |
515 | crypto_skcipher_alg_ivsize(ctr) != 16 || | |
516 | ctr->base.cra_blocksize != 1) | |
4a49b499 JL |
517 | goto err_drop_ctr; |
518 | ||
6a1faa4a EB |
519 | /* ctr and cbcmac must use the same underlying block cipher. */ |
520 | if (strcmp(ctr->base.cra_name + 4, mac->base.cra_name + 7) != 0) | |
4a49b499 JL |
521 | goto err_drop_ctr; |
522 | ||
523 | err = -ENAMETOOLONG; | |
6a1faa4a EB |
524 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
525 | "ccm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME) | |
526 | goto err_drop_ctr; | |
527 | ||
81c4c35e | 528 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
464b93a3 | 529 | "ccm_base(%s,%s)", ctr->base.cra_driver_name, |
f15f05b0 | 530 | mac->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
4a49b499 JL |
531 | goto err_drop_ctr; |
532 | ||
464b93a3 | 533 | inst->alg.base.cra_flags = ctr->base.cra_flags & CRYPTO_ALG_ASYNC; |
f15f05b0 | 534 | inst->alg.base.cra_priority = (mac->base.cra_priority + |
464b93a3 | 535 | ctr->base.cra_priority) / 2; |
81c4c35e | 536 | inst->alg.base.cra_blocksize = 1; |
f15f05b0 | 537 | inst->alg.base.cra_alignmask = mac->base.cra_alignmask | |
5ba8e2a0 | 538 | ctr->base.cra_alignmask; |
81c4c35e | 539 | inst->alg.ivsize = 16; |
464b93a3 | 540 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr); |
81c4c35e HX |
541 | inst->alg.maxauthsize = 16; |
542 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx); | |
543 | inst->alg.init = crypto_ccm_init_tfm; | |
544 | inst->alg.exit = crypto_ccm_exit_tfm; | |
545 | inst->alg.setkey = crypto_ccm_setkey; | |
546 | inst->alg.setauthsize = crypto_ccm_setauthsize; | |
547 | inst->alg.encrypt = crypto_ccm_encrypt; | |
548 | inst->alg.decrypt = crypto_ccm_decrypt; | |
549 | ||
550 | inst->free = crypto_ccm_free; | |
551 | ||
552 | err = aead_register_instance(tmpl, inst); | |
553 | if (err) | |
554 | goto err_drop_ctr; | |
4a49b499 | 555 | |
f15f05b0 AB |
556 | out_put_mac: |
557 | crypto_mod_put(mac_alg); | |
81c4c35e | 558 | return err; |
4a49b499 JL |
559 | |
560 | err_drop_ctr: | |
561 | crypto_drop_skcipher(&ictx->ctr); | |
f15f05b0 AB |
562 | err_drop_mac: |
563 | crypto_drop_ahash(&ictx->mac); | |
4a49b499 JL |
564 | err_free_inst: |
565 | kfree(inst); | |
f15f05b0 | 566 | goto out_put_mac; |
4a49b499 JL |
567 | } |
568 | ||
81c4c35e | 569 | static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb) |
4a49b499 | 570 | { |
4a49b499 JL |
571 | const char *cipher_name; |
572 | char ctr_name[CRYPTO_MAX_ALG_NAME]; | |
f15f05b0 | 573 | char mac_name[CRYPTO_MAX_ALG_NAME]; |
4a49b499 JL |
574 | |
575 | cipher_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 576 | if (IS_ERR(cipher_name)) |
81c4c35e | 577 | return PTR_ERR(cipher_name); |
4a49b499 JL |
578 | |
579 | if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", | |
580 | cipher_name) >= CRYPTO_MAX_ALG_NAME) | |
81c4c35e | 581 | return -ENAMETOOLONG; |
4a49b499 | 582 | |
f15f05b0 AB |
583 | if (snprintf(mac_name, CRYPTO_MAX_ALG_NAME, "cbcmac(%s)", |
584 | cipher_name) >= CRYPTO_MAX_ALG_NAME) | |
585 | return -ENAMETOOLONG; | |
586 | ||
6a1faa4a | 587 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
4a49b499 JL |
588 | } |
589 | ||
81c4c35e HX |
590 | static int crypto_ccm_base_create(struct crypto_template *tmpl, |
591 | struct rtattr **tb) | |
4a49b499 | 592 | { |
4a49b499 | 593 | const char *ctr_name; |
6a1faa4a | 594 | const char *mac_name; |
4a49b499 JL |
595 | |
596 | ctr_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 597 | if (IS_ERR(ctr_name)) |
81c4c35e | 598 | return PTR_ERR(ctr_name); |
4a49b499 | 599 | |
6a1faa4a EB |
600 | mac_name = crypto_attr_alg_name(tb[2]); |
601 | if (IS_ERR(mac_name)) | |
602 | return PTR_ERR(mac_name); | |
4a49b499 | 603 | |
6a1faa4a | 604 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
4a49b499 JL |
605 | } |
606 | ||
4a49b499 JL |
607 | static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key, |
608 | unsigned int keylen) | |
609 | { | |
610 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); | |
611 | struct crypto_aead *child = ctx->child; | |
612 | int err; | |
613 | ||
614 | if (keylen < 3) | |
615 | return -EINVAL; | |
616 | ||
617 | keylen -= 3; | |
618 | memcpy(ctx->nonce, key + keylen, 3); | |
619 | ||
620 | crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK); | |
621 | crypto_aead_set_flags(child, crypto_aead_get_flags(parent) & | |
622 | CRYPTO_TFM_REQ_MASK); | |
623 | err = crypto_aead_setkey(child, key, keylen); | |
624 | crypto_aead_set_flags(parent, crypto_aead_get_flags(child) & | |
625 | CRYPTO_TFM_RES_MASK); | |
626 | ||
627 | return err; | |
628 | } | |
629 | ||
630 | static int crypto_rfc4309_setauthsize(struct crypto_aead *parent, | |
631 | unsigned int authsize) | |
632 | { | |
633 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); | |
634 | ||
635 | switch (authsize) { | |
636 | case 8: | |
637 | case 12: | |
638 | case 16: | |
639 | break; | |
640 | default: | |
641 | return -EINVAL; | |
642 | } | |
643 | ||
644 | return crypto_aead_setauthsize(ctx->child, authsize); | |
645 | } | |
646 | ||
647 | static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req) | |
648 | { | |
81c4c35e HX |
649 | struct crypto_rfc4309_req_ctx *rctx = aead_request_ctx(req); |
650 | struct aead_request *subreq = &rctx->subreq; | |
4a49b499 JL |
651 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
652 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(aead); | |
653 | struct crypto_aead *child = ctx->child; | |
81c4c35e | 654 | struct scatterlist *sg; |
4a49b499 JL |
655 | u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child), |
656 | crypto_aead_alignmask(child) + 1); | |
657 | ||
658 | /* L' */ | |
659 | iv[0] = 3; | |
660 | ||
661 | memcpy(iv + 1, ctx->nonce, 3); | |
662 | memcpy(iv + 4, req->iv, 8); | |
663 | ||
81c4c35e HX |
664 | scatterwalk_map_and_copy(iv + 16, req->src, 0, req->assoclen - 8, 0); |
665 | ||
666 | sg_init_table(rctx->src, 3); | |
667 | sg_set_buf(rctx->src, iv + 16, req->assoclen - 8); | |
668 | sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen); | |
669 | if (sg != rctx->src + 1) | |
670 | sg_chain(rctx->src, 2, sg); | |
671 | ||
672 | if (req->src != req->dst) { | |
673 | sg_init_table(rctx->dst, 3); | |
674 | sg_set_buf(rctx->dst, iv + 16, req->assoclen - 8); | |
675 | sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen); | |
676 | if (sg != rctx->dst + 1) | |
677 | sg_chain(rctx->dst, 2, sg); | |
678 | } | |
679 | ||
4a49b499 JL |
680 | aead_request_set_tfm(subreq, child); |
681 | aead_request_set_callback(subreq, req->base.flags, req->base.complete, | |
682 | req->base.data); | |
81c4c35e HX |
683 | aead_request_set_crypt(subreq, rctx->src, |
684 | req->src == req->dst ? rctx->src : rctx->dst, | |
685 | req->cryptlen, iv); | |
686 | aead_request_set_ad(subreq, req->assoclen - 8); | |
4a49b499 JL |
687 | |
688 | return subreq; | |
689 | } | |
690 | ||
691 | static int crypto_rfc4309_encrypt(struct aead_request *req) | |
692 | { | |
81c4c35e HX |
693 | if (req->assoclen != 16 && req->assoclen != 20) |
694 | return -EINVAL; | |
695 | ||
4a49b499 JL |
696 | req = crypto_rfc4309_crypt(req); |
697 | ||
698 | return crypto_aead_encrypt(req); | |
699 | } | |
700 | ||
701 | static int crypto_rfc4309_decrypt(struct aead_request *req) | |
702 | { | |
81c4c35e HX |
703 | if (req->assoclen != 16 && req->assoclen != 20) |
704 | return -EINVAL; | |
705 | ||
4a49b499 JL |
706 | req = crypto_rfc4309_crypt(req); |
707 | ||
708 | return crypto_aead_decrypt(req); | |
709 | } | |
710 | ||
81c4c35e | 711 | static int crypto_rfc4309_init_tfm(struct crypto_aead *tfm) |
4a49b499 | 712 | { |
81c4c35e HX |
713 | struct aead_instance *inst = aead_alg_instance(tfm); |
714 | struct crypto_aead_spawn *spawn = aead_instance_ctx(inst); | |
715 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); | |
4a49b499 JL |
716 | struct crypto_aead *aead; |
717 | unsigned long align; | |
718 | ||
719 | aead = crypto_spawn_aead(spawn); | |
720 | if (IS_ERR(aead)) | |
721 | return PTR_ERR(aead); | |
722 | ||
723 | ctx->child = aead; | |
724 | ||
725 | align = crypto_aead_alignmask(aead); | |
726 | align &= ~(crypto_tfm_ctx_alignment() - 1); | |
81c4c35e HX |
727 | crypto_aead_set_reqsize( |
728 | tfm, | |
729 | sizeof(struct crypto_rfc4309_req_ctx) + | |
2c221ad3 | 730 | ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) + |
81c4c35e | 731 | align + 32); |
4a49b499 JL |
732 | |
733 | return 0; | |
734 | } | |
735 | ||
81c4c35e | 736 | static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm) |
4a49b499 | 737 | { |
81c4c35e | 738 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); |
4a49b499 JL |
739 | |
740 | crypto_free_aead(ctx->child); | |
741 | } | |
742 | ||
81c4c35e HX |
743 | static void crypto_rfc4309_free(struct aead_instance *inst) |
744 | { | |
745 | crypto_drop_aead(aead_instance_ctx(inst)); | |
746 | kfree(inst); | |
747 | } | |
748 | ||
749 | static int crypto_rfc4309_create(struct crypto_template *tmpl, | |
750 | struct rtattr **tb) | |
4a49b499 JL |
751 | { |
752 | struct crypto_attr_type *algt; | |
81c4c35e | 753 | struct aead_instance *inst; |
4a49b499 | 754 | struct crypto_aead_spawn *spawn; |
81c4c35e | 755 | struct aead_alg *alg; |
4a49b499 JL |
756 | const char *ccm_name; |
757 | int err; | |
758 | ||
759 | algt = crypto_get_attr_type(tb); | |
4a49b499 | 760 | if (IS_ERR(algt)) |
81c4c35e | 761 | return PTR_ERR(algt); |
4a49b499 | 762 | |
5e4b8c1f | 763 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
81c4c35e | 764 | return -EINVAL; |
4a49b499 JL |
765 | |
766 | ccm_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 767 | if (IS_ERR(ccm_name)) |
81c4c35e | 768 | return PTR_ERR(ccm_name); |
4a49b499 JL |
769 | |
770 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); | |
771 | if (!inst) | |
81c4c35e | 772 | return -ENOMEM; |
4a49b499 | 773 | |
81c4c35e HX |
774 | spawn = aead_instance_ctx(inst); |
775 | crypto_set_aead_spawn(spawn, aead_crypto_instance(inst)); | |
4a49b499 JL |
776 | err = crypto_grab_aead(spawn, ccm_name, 0, |
777 | crypto_requires_sync(algt->type, algt->mask)); | |
778 | if (err) | |
779 | goto out_free_inst; | |
780 | ||
81c4c35e | 781 | alg = crypto_spawn_aead_alg(spawn); |
4a49b499 JL |
782 | |
783 | err = -EINVAL; | |
784 | ||
785 | /* We only support 16-byte blocks. */ | |
81c4c35e | 786 | if (crypto_aead_alg_ivsize(alg) != 16) |
4a49b499 JL |
787 | goto out_drop_alg; |
788 | ||
789 | /* Not a stream cipher? */ | |
81c4c35e | 790 | if (alg->base.cra_blocksize != 1) |
4a49b499 JL |
791 | goto out_drop_alg; |
792 | ||
793 | err = -ENAMETOOLONG; | |
81c4c35e HX |
794 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
795 | "rfc4309(%s)", alg->base.cra_name) >= | |
796 | CRYPTO_MAX_ALG_NAME || | |
797 | snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
798 | "rfc4309(%s)", alg->base.cra_driver_name) >= | |
4a49b499 JL |
799 | CRYPTO_MAX_ALG_NAME) |
800 | goto out_drop_alg; | |
801 | ||
81c4c35e | 802 | inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; |
81c4c35e HX |
803 | inst->alg.base.cra_priority = alg->base.cra_priority; |
804 | inst->alg.base.cra_blocksize = 1; | |
805 | inst->alg.base.cra_alignmask = alg->base.cra_alignmask; | |
4a49b499 | 806 | |
81c4c35e | 807 | inst->alg.ivsize = 8; |
464b93a3 | 808 | inst->alg.chunksize = crypto_aead_alg_chunksize(alg); |
81c4c35e | 809 | inst->alg.maxauthsize = 16; |
4a49b499 | 810 | |
81c4c35e | 811 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx); |
4a49b499 | 812 | |
81c4c35e HX |
813 | inst->alg.init = crypto_rfc4309_init_tfm; |
814 | inst->alg.exit = crypto_rfc4309_exit_tfm; | |
4a49b499 | 815 | |
81c4c35e HX |
816 | inst->alg.setkey = crypto_rfc4309_setkey; |
817 | inst->alg.setauthsize = crypto_rfc4309_setauthsize; | |
818 | inst->alg.encrypt = crypto_rfc4309_encrypt; | |
819 | inst->alg.decrypt = crypto_rfc4309_decrypt; | |
4a49b499 | 820 | |
81c4c35e HX |
821 | inst->free = crypto_rfc4309_free; |
822 | ||
823 | err = aead_register_instance(tmpl, inst); | |
824 | if (err) | |
825 | goto out_drop_alg; | |
4a49b499 JL |
826 | |
827 | out: | |
81c4c35e | 828 | return err; |
4a49b499 JL |
829 | |
830 | out_drop_alg: | |
831 | crypto_drop_aead(spawn); | |
832 | out_free_inst: | |
833 | kfree(inst); | |
4a49b499 JL |
834 | goto out; |
835 | } | |
836 | ||
f15f05b0 AB |
837 | static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent, |
838 | const u8 *inkey, unsigned int keylen) | |
839 | { | |
840 | struct cbcmac_tfm_ctx *ctx = crypto_shash_ctx(parent); | |
841 | ||
842 | return crypto_cipher_setkey(ctx->child, inkey, keylen); | |
843 | } | |
844 | ||
845 | static int crypto_cbcmac_digest_init(struct shash_desc *pdesc) | |
846 | { | |
847 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
848 | int bs = crypto_shash_digestsize(pdesc->tfm); | |
5338ad70 | 849 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(pdesc->tfm) - bs; |
f15f05b0 AB |
850 | |
851 | ctx->len = 0; | |
5338ad70 | 852 | memset(dg, 0, bs); |
f15f05b0 AB |
853 | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p, | |
858 | unsigned int len) | |
859 | { | |
860 | struct crypto_shash *parent = pdesc->tfm; | |
861 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); | |
862 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
863 | struct crypto_cipher *tfm = tctx->child; | |
864 | int bs = crypto_shash_digestsize(parent); | |
5338ad70 | 865 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; |
f15f05b0 AB |
866 | |
867 | while (len > 0) { | |
868 | unsigned int l = min(len, bs - ctx->len); | |
869 | ||
5338ad70 | 870 | crypto_xor(dg + ctx->len, p, l); |
f15f05b0 AB |
871 | ctx->len +=l; |
872 | len -= l; | |
873 | p += l; | |
874 | ||
875 | if (ctx->len == bs) { | |
5338ad70 | 876 | crypto_cipher_encrypt_one(tfm, dg, dg); |
f15f05b0 AB |
877 | ctx->len = 0; |
878 | } | |
879 | } | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out) | |
885 | { | |
886 | struct crypto_shash *parent = pdesc->tfm; | |
887 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); | |
888 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
889 | struct crypto_cipher *tfm = tctx->child; | |
890 | int bs = crypto_shash_digestsize(parent); | |
5338ad70 | 891 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; |
f15f05b0 AB |
892 | |
893 | if (ctx->len) | |
5338ad70 | 894 | crypto_cipher_encrypt_one(tfm, dg, dg); |
f15f05b0 | 895 | |
5338ad70 | 896 | memcpy(out, dg, bs); |
f15f05b0 AB |
897 | return 0; |
898 | } | |
899 | ||
900 | static int cbcmac_init_tfm(struct crypto_tfm *tfm) | |
901 | { | |
902 | struct crypto_cipher *cipher; | |
903 | struct crypto_instance *inst = (void *)tfm->__crt_alg; | |
904 | struct crypto_spawn *spawn = crypto_instance_ctx(inst); | |
905 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); | |
906 | ||
907 | cipher = crypto_spawn_cipher(spawn); | |
908 | if (IS_ERR(cipher)) | |
909 | return PTR_ERR(cipher); | |
910 | ||
911 | ctx->child = cipher; | |
912 | ||
913 | return 0; | |
914 | }; | |
915 | ||
916 | static void cbcmac_exit_tfm(struct crypto_tfm *tfm) | |
917 | { | |
918 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); | |
919 | crypto_free_cipher(ctx->child); | |
920 | } | |
921 | ||
922 | static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb) | |
923 | { | |
924 | struct shash_instance *inst; | |
925 | struct crypto_alg *alg; | |
926 | int err; | |
927 | ||
928 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH); | |
929 | if (err) | |
930 | return err; | |
931 | ||
932 | alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, | |
933 | CRYPTO_ALG_TYPE_MASK); | |
934 | if (IS_ERR(alg)) | |
935 | return PTR_ERR(alg); | |
936 | ||
937 | inst = shash_alloc_instance("cbcmac", alg); | |
938 | err = PTR_ERR(inst); | |
939 | if (IS_ERR(inst)) | |
940 | goto out_put_alg; | |
941 | ||
942 | err = crypto_init_spawn(shash_instance_ctx(inst), alg, | |
943 | shash_crypto_instance(inst), | |
944 | CRYPTO_ALG_TYPE_MASK); | |
945 | if (err) | |
946 | goto out_free_inst; | |
947 | ||
948 | inst->alg.base.cra_priority = alg->cra_priority; | |
949 | inst->alg.base.cra_blocksize = 1; | |
950 | ||
951 | inst->alg.digestsize = alg->cra_blocksize; | |
5338ad70 AB |
952 | inst->alg.descsize = ALIGN(sizeof(struct cbcmac_desc_ctx), |
953 | alg->cra_alignmask + 1) + | |
f15f05b0 AB |
954 | alg->cra_blocksize; |
955 | ||
956 | inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx); | |
957 | inst->alg.base.cra_init = cbcmac_init_tfm; | |
958 | inst->alg.base.cra_exit = cbcmac_exit_tfm; | |
959 | ||
960 | inst->alg.init = crypto_cbcmac_digest_init; | |
961 | inst->alg.update = crypto_cbcmac_digest_update; | |
962 | inst->alg.final = crypto_cbcmac_digest_final; | |
963 | inst->alg.setkey = crypto_cbcmac_digest_setkey; | |
964 | ||
965 | err = shash_register_instance(tmpl, inst); | |
966 | ||
967 | out_free_inst: | |
968 | if (err) | |
969 | shash_free_instance(shash_crypto_instance(inst)); | |
970 | ||
971 | out_put_alg: | |
972 | crypto_mod_put(alg); | |
973 | return err; | |
974 | } | |
975 | ||
0db19035 XW |
976 | static struct crypto_template crypto_ccm_tmpls[] = { |
977 | { | |
978 | .name = "cbcmac", | |
979 | .create = cbcmac_create, | |
980 | .free = shash_free_instance, | |
981 | .module = THIS_MODULE, | |
982 | }, { | |
983 | .name = "ccm_base", | |
984 | .create = crypto_ccm_base_create, | |
985 | .module = THIS_MODULE, | |
986 | }, { | |
987 | .name = "ccm", | |
988 | .create = crypto_ccm_create, | |
989 | .module = THIS_MODULE, | |
990 | }, { | |
991 | .name = "rfc4309", | |
992 | .create = crypto_rfc4309_create, | |
993 | .module = THIS_MODULE, | |
994 | }, | |
f15f05b0 AB |
995 | }; |
996 | ||
4a49b499 JL |
997 | static int __init crypto_ccm_module_init(void) |
998 | { | |
0db19035 XW |
999 | return crypto_register_templates(crypto_ccm_tmpls, |
1000 | ARRAY_SIZE(crypto_ccm_tmpls)); | |
4a49b499 JL |
1001 | } |
1002 | ||
1003 | static void __exit crypto_ccm_module_exit(void) | |
1004 | { | |
0db19035 XW |
1005 | crypto_unregister_templates(crypto_ccm_tmpls, |
1006 | ARRAY_SIZE(crypto_ccm_tmpls)); | |
4a49b499 JL |
1007 | } |
1008 | ||
c4741b23 | 1009 | subsys_initcall(crypto_ccm_module_init); |
4a49b499 JL |
1010 | module_exit(crypto_ccm_module_exit); |
1011 | ||
1012 | MODULE_LICENSE("GPL"); | |
1013 | MODULE_DESCRIPTION("Counter with CBC MAC"); | |
5d26a105 KC |
1014 | MODULE_ALIAS_CRYPTO("ccm_base"); |
1015 | MODULE_ALIAS_CRYPTO("rfc4309"); | |
4943ba16 | 1016 | MODULE_ALIAS_CRYPTO("ccm"); |