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Commit | Line | Data |
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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]; | |
464b93a3 | 53 | struct skcipher_request skreq; |
4a49b499 JL |
54 | }; |
55 | ||
f15f05b0 AB |
56 | struct cbcmac_tfm_ctx { |
57 | struct crypto_cipher *child; | |
58 | }; | |
59 | ||
60 | struct cbcmac_desc_ctx { | |
61 | unsigned int len; | |
f15f05b0 AB |
62 | }; |
63 | ||
4a49b499 JL |
64 | static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx( |
65 | struct aead_request *req) | |
66 | { | |
67 | unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req)); | |
68 | ||
69 | return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1); | |
70 | } | |
71 | ||
72 | static int set_msg_len(u8 *block, unsigned int msglen, int csize) | |
73 | { | |
74 | __be32 data; | |
75 | ||
76 | memset(block, 0, csize); | |
77 | block += csize; | |
78 | ||
79 | if (csize >= 4) | |
80 | csize = 4; | |
81 | else if (msglen > (1 << (8 * csize))) | |
82 | return -EOVERFLOW; | |
83 | ||
84 | data = cpu_to_be32(msglen); | |
85 | memcpy(block - csize, (u8 *)&data + 4 - csize, csize); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key, | |
91 | unsigned int keylen) | |
92 | { | |
93 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
464b93a3 | 94 | struct crypto_skcipher *ctr = ctx->ctr; |
f15f05b0 | 95 | struct crypto_ahash *mac = ctx->mac; |
4a49b499 JL |
96 | int err = 0; |
97 | ||
464b93a3 HX |
98 | crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK); |
99 | crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) & | |
100 | CRYPTO_TFM_REQ_MASK); | |
101 | err = crypto_skcipher_setkey(ctr, key, keylen); | |
102 | crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) & | |
4a49b499 JL |
103 | CRYPTO_TFM_RES_MASK); |
104 | if (err) | |
105 | goto out; | |
106 | ||
f15f05b0 AB |
107 | crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK); |
108 | crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) & | |
4a49b499 | 109 | CRYPTO_TFM_REQ_MASK); |
f15f05b0 AB |
110 | err = crypto_ahash_setkey(mac, key, keylen); |
111 | crypto_aead_set_flags(aead, crypto_ahash_get_flags(mac) & | |
4a49b499 JL |
112 | CRYPTO_TFM_RES_MASK); |
113 | ||
114 | out: | |
115 | return err; | |
116 | } | |
117 | ||
118 | static int crypto_ccm_setauthsize(struct crypto_aead *tfm, | |
119 | unsigned int authsize) | |
120 | { | |
121 | switch (authsize) { | |
122 | case 4: | |
123 | case 6: | |
124 | case 8: | |
125 | case 10: | |
126 | case 12: | |
127 | case 14: | |
128 | case 16: | |
129 | break; | |
130 | default: | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | static int format_input(u8 *info, struct aead_request *req, | |
138 | unsigned int cryptlen) | |
139 | { | |
140 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
141 | unsigned int lp = req->iv[0]; | |
142 | unsigned int l = lp + 1; | |
143 | unsigned int m; | |
144 | ||
145 | m = crypto_aead_authsize(aead); | |
146 | ||
147 | memcpy(info, req->iv, 16); | |
148 | ||
149 | /* format control info per RFC 3610 and | |
150 | * NIST Special Publication 800-38C | |
151 | */ | |
152 | *info |= (8 * ((m - 2) / 2)); | |
153 | if (req->assoclen) | |
154 | *info |= 64; | |
155 | ||
156 | return set_msg_len(info + 16 - l, cryptlen, l); | |
157 | } | |
158 | ||
159 | static int format_adata(u8 *adata, unsigned int a) | |
160 | { | |
161 | int len = 0; | |
162 | ||
163 | /* add control info for associated data | |
164 | * RFC 3610 and NIST Special Publication 800-38C | |
165 | */ | |
166 | if (a < 65280) { | |
167 | *(__be16 *)adata = cpu_to_be16(a); | |
168 | len = 2; | |
169 | } else { | |
170 | *(__be16 *)adata = cpu_to_be16(0xfffe); | |
171 | *(__be32 *)&adata[2] = cpu_to_be32(a); | |
172 | len = 6; | |
173 | } | |
174 | ||
175 | return len; | |
176 | } | |
177 | ||
4a49b499 JL |
178 | static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain, |
179 | unsigned int cryptlen) | |
180 | { | |
f15f05b0 | 181 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
4a49b499 JL |
182 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
183 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
f15f05b0 | 184 | AHASH_REQUEST_ON_STACK(ahreq, ctx->mac); |
4a49b499 | 185 | unsigned int assoclen = req->assoclen; |
f15f05b0 | 186 | struct scatterlist sg[3]; |
3b30460c AB |
187 | u8 *odata = pctx->odata; |
188 | u8 *idata = pctx->idata; | |
f15f05b0 | 189 | int ilen, err; |
4a49b499 JL |
190 | |
191 | /* format control data for input */ | |
192 | err = format_input(odata, req, cryptlen); | |
193 | if (err) | |
194 | goto out; | |
195 | ||
f15f05b0 AB |
196 | sg_init_table(sg, 3); |
197 | sg_set_buf(&sg[0], odata, 16); | |
4a49b499 JL |
198 | |
199 | /* format associated data and compute into mac */ | |
200 | if (assoclen) { | |
f15f05b0 AB |
201 | ilen = format_adata(idata, assoclen); |
202 | sg_set_buf(&sg[1], idata, ilen); | |
203 | sg_chain(sg, 3, req->src); | |
516280e7 | 204 | } else { |
f15f05b0 AB |
205 | ilen = 0; |
206 | sg_chain(sg, 2, req->src); | |
4a49b499 JL |
207 | } |
208 | ||
f15f05b0 AB |
209 | ahash_request_set_tfm(ahreq, ctx->mac); |
210 | ahash_request_set_callback(ahreq, pctx->flags, NULL, NULL); | |
211 | ahash_request_set_crypt(ahreq, sg, NULL, assoclen + ilen + 16); | |
212 | err = crypto_ahash_init(ahreq); | |
213 | if (err) | |
214 | goto out; | |
215 | err = crypto_ahash_update(ahreq); | |
216 | if (err) | |
217 | goto out; | |
4a49b499 | 218 | |
f15f05b0 AB |
219 | /* we need to pad the MAC input to a round multiple of the block size */ |
220 | ilen = 16 - (assoclen + ilen) % 16; | |
221 | if (ilen < 16) { | |
222 | memset(idata, 0, ilen); | |
223 | sg_init_table(sg, 2); | |
224 | sg_set_buf(&sg[0], idata, ilen); | |
225 | if (plain) | |
226 | sg_chain(sg, 2, plain); | |
227 | plain = sg; | |
228 | cryptlen += ilen; | |
229 | } | |
230 | ||
231 | ahash_request_set_crypt(ahreq, plain, pctx->odata, cryptlen); | |
232 | err = crypto_ahash_finup(ahreq); | |
4a49b499 JL |
233 | out: |
234 | return err; | |
235 | } | |
236 | ||
237 | static void crypto_ccm_encrypt_done(struct crypto_async_request *areq, int err) | |
238 | { | |
239 | struct aead_request *req = areq->data; | |
240 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
241 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
242 | u8 *odata = pctx->odata; | |
243 | ||
244 | if (!err) | |
81c4c35e HX |
245 | scatterwalk_map_and_copy(odata, req->dst, |
246 | req->assoclen + req->cryptlen, | |
4a49b499 JL |
247 | crypto_aead_authsize(aead), 1); |
248 | aead_request_complete(req, err); | |
249 | } | |
250 | ||
251 | static inline int crypto_ccm_check_iv(const u8 *iv) | |
252 | { | |
253 | /* 2 <= L <= 8, so 1 <= L' <= 7. */ | |
254 | if (1 > iv[0] || iv[0] > 7) | |
255 | return -EINVAL; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
81c4c35e HX |
260 | static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag) |
261 | { | |
262 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
263 | struct scatterlist *sg; | |
264 | u8 *iv = req->iv; | |
265 | int err; | |
266 | ||
267 | err = crypto_ccm_check_iv(iv); | |
268 | if (err) | |
269 | return err; | |
270 | ||
271 | pctx->flags = aead_request_flags(req); | |
272 | ||
273 | /* Note: rfc 3610 and NIST 800-38C require counter of | |
274 | * zero to encrypt auth tag. | |
275 | */ | |
276 | memset(iv + 15 - iv[0], 0, iv[0] + 1); | |
277 | ||
278 | sg_init_table(pctx->src, 3); | |
279 | sg_set_buf(pctx->src, tag, 16); | |
280 | sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen); | |
281 | if (sg != pctx->src + 1) | |
282 | sg_chain(pctx->src, 2, sg); | |
283 | ||
284 | if (req->src != req->dst) { | |
285 | sg_init_table(pctx->dst, 3); | |
286 | sg_set_buf(pctx->dst, tag, 16); | |
287 | sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen); | |
288 | if (sg != pctx->dst + 1) | |
289 | sg_chain(pctx->dst, 2, sg); | |
290 | } | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
4a49b499 JL |
295 | static int crypto_ccm_encrypt(struct aead_request *req) |
296 | { | |
297 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
298 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
299 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
464b93a3 | 300 | struct skcipher_request *skreq = &pctx->skreq; |
4a49b499 JL |
301 | struct scatterlist *dst; |
302 | unsigned int cryptlen = req->cryptlen; | |
303 | u8 *odata = pctx->odata; | |
304 | u8 *iv = req->iv; | |
305 | int err; | |
306 | ||
81c4c35e | 307 | err = crypto_ccm_init_crypt(req, odata); |
4a49b499 JL |
308 | if (err) |
309 | return err; | |
310 | ||
81c4c35e | 311 | err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen); |
4a49b499 JL |
312 | if (err) |
313 | return err; | |
314 | ||
4a49b499 | 315 | dst = pctx->src; |
81c4c35e | 316 | if (req->src != req->dst) |
4a49b499 | 317 | dst = pctx->dst; |
4a49b499 | 318 | |
464b93a3 HX |
319 | skcipher_request_set_tfm(skreq, ctx->ctr); |
320 | skcipher_request_set_callback(skreq, pctx->flags, | |
321 | crypto_ccm_encrypt_done, req); | |
322 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); | |
323 | err = crypto_skcipher_encrypt(skreq); | |
4a49b499 JL |
324 | if (err) |
325 | return err; | |
326 | ||
327 | /* copy authtag to end of dst */ | |
81c4c35e | 328 | scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen, |
4a49b499 JL |
329 | crypto_aead_authsize(aead), 1); |
330 | return err; | |
331 | } | |
332 | ||
333 | static void crypto_ccm_decrypt_done(struct crypto_async_request *areq, | |
334 | int err) | |
335 | { | |
336 | struct aead_request *req = areq->data; | |
337 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
338 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
339 | unsigned int authsize = crypto_aead_authsize(aead); | |
340 | unsigned int cryptlen = req->cryptlen - authsize; | |
81c4c35e HX |
341 | struct scatterlist *dst; |
342 | ||
343 | pctx->flags = 0; | |
344 | ||
345 | dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst); | |
4a49b499 JL |
346 | |
347 | if (!err) { | |
81c4c35e | 348 | err = crypto_ccm_auth(req, dst, cryptlen); |
6bf37e5a | 349 | if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize)) |
4a49b499 JL |
350 | err = -EBADMSG; |
351 | } | |
352 | aead_request_complete(req, err); | |
353 | } | |
354 | ||
355 | static int crypto_ccm_decrypt(struct aead_request *req) | |
356 | { | |
357 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
358 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); | |
359 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); | |
464b93a3 | 360 | struct skcipher_request *skreq = &pctx->skreq; |
4a49b499 JL |
361 | struct scatterlist *dst; |
362 | unsigned int authsize = crypto_aead_authsize(aead); | |
363 | unsigned int cryptlen = req->cryptlen; | |
364 | u8 *authtag = pctx->auth_tag; | |
365 | u8 *odata = pctx->odata; | |
441f99c9 | 366 | u8 *iv = pctx->idata; |
4a49b499 JL |
367 | int err; |
368 | ||
4a49b499 JL |
369 | cryptlen -= authsize; |
370 | ||
81c4c35e | 371 | err = crypto_ccm_init_crypt(req, authtag); |
4a49b499 JL |
372 | if (err) |
373 | return err; | |
374 | ||
81c4c35e HX |
375 | scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen, |
376 | authsize, 0); | |
4a49b499 JL |
377 | |
378 | dst = pctx->src; | |
81c4c35e | 379 | if (req->src != req->dst) |
4a49b499 | 380 | dst = pctx->dst; |
4a49b499 | 381 | |
441f99c9 RI |
382 | memcpy(iv, req->iv, 16); |
383 | ||
464b93a3 HX |
384 | skcipher_request_set_tfm(skreq, ctx->ctr); |
385 | skcipher_request_set_callback(skreq, pctx->flags, | |
386 | crypto_ccm_decrypt_done, req); | |
387 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); | |
388 | err = crypto_skcipher_decrypt(skreq); | |
4a49b499 JL |
389 | if (err) |
390 | return err; | |
391 | ||
81c4c35e | 392 | err = crypto_ccm_auth(req, sg_next(dst), cryptlen); |
4a49b499 JL |
393 | if (err) |
394 | return err; | |
395 | ||
396 | /* verify */ | |
6bf37e5a | 397 | if (crypto_memneq(authtag, odata, authsize)) |
4a49b499 JL |
398 | return -EBADMSG; |
399 | ||
400 | return err; | |
401 | } | |
402 | ||
81c4c35e | 403 | static int crypto_ccm_init_tfm(struct crypto_aead *tfm) |
4a49b499 | 404 | { |
81c4c35e HX |
405 | struct aead_instance *inst = aead_alg_instance(tfm); |
406 | struct ccm_instance_ctx *ictx = aead_instance_ctx(inst); | |
407 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); | |
f15f05b0 | 408 | struct crypto_ahash *mac; |
464b93a3 | 409 | struct crypto_skcipher *ctr; |
4a49b499 JL |
410 | unsigned long align; |
411 | int err; | |
412 | ||
f15f05b0 AB |
413 | mac = crypto_spawn_ahash(&ictx->mac); |
414 | if (IS_ERR(mac)) | |
415 | return PTR_ERR(mac); | |
4a49b499 | 416 | |
60425a8b | 417 | ctr = crypto_spawn_skcipher(&ictx->ctr); |
4a49b499 JL |
418 | err = PTR_ERR(ctr); |
419 | if (IS_ERR(ctr)) | |
f15f05b0 | 420 | goto err_free_mac; |
4a49b499 | 421 | |
f15f05b0 | 422 | ctx->mac = mac; |
4a49b499 JL |
423 | ctx->ctr = ctr; |
424 | ||
81c4c35e | 425 | align = crypto_aead_alignmask(tfm); |
4a49b499 | 426 | align &= ~(crypto_tfm_ctx_alignment() - 1); |
81c4c35e HX |
427 | crypto_aead_set_reqsize( |
428 | tfm, | |
2c221ad3 | 429 | align + sizeof(struct crypto_ccm_req_priv_ctx) + |
464b93a3 | 430 | crypto_skcipher_reqsize(ctr)); |
4a49b499 JL |
431 | |
432 | return 0; | |
433 | ||
f15f05b0 AB |
434 | err_free_mac: |
435 | crypto_free_ahash(mac); | |
4a49b499 JL |
436 | return err; |
437 | } | |
438 | ||
81c4c35e | 439 | static void crypto_ccm_exit_tfm(struct crypto_aead *tfm) |
4a49b499 | 440 | { |
81c4c35e | 441 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); |
4a49b499 | 442 | |
f15f05b0 | 443 | crypto_free_ahash(ctx->mac); |
464b93a3 | 444 | crypto_free_skcipher(ctx->ctr); |
4a49b499 JL |
445 | } |
446 | ||
81c4c35e HX |
447 | static void crypto_ccm_free(struct aead_instance *inst) |
448 | { | |
449 | struct ccm_instance_ctx *ctx = aead_instance_ctx(inst); | |
450 | ||
f15f05b0 | 451 | crypto_drop_ahash(&ctx->mac); |
81c4c35e HX |
452 | crypto_drop_skcipher(&ctx->ctr); |
453 | kfree(inst); | |
454 | } | |
455 | ||
456 | static int crypto_ccm_create_common(struct crypto_template *tmpl, | |
457 | struct rtattr **tb, | |
81c4c35e | 458 | const char *ctr_name, |
f15f05b0 | 459 | const char *mac_name) |
4a49b499 JL |
460 | { |
461 | struct crypto_attr_type *algt; | |
81c4c35e | 462 | struct aead_instance *inst; |
464b93a3 | 463 | struct skcipher_alg *ctr; |
f15f05b0 AB |
464 | struct crypto_alg *mac_alg; |
465 | struct hash_alg_common *mac; | |
4a49b499 JL |
466 | struct ccm_instance_ctx *ictx; |
467 | int err; | |
468 | ||
469 | algt = crypto_get_attr_type(tb); | |
4a49b499 | 470 | if (IS_ERR(algt)) |
81c4c35e | 471 | return PTR_ERR(algt); |
4a49b499 | 472 | |
5e4b8c1f | 473 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
81c4c35e | 474 | return -EINVAL; |
4a49b499 | 475 | |
f15f05b0 AB |
476 | mac_alg = crypto_find_alg(mac_name, &crypto_ahash_type, |
477 | CRYPTO_ALG_TYPE_HASH, | |
478 | CRYPTO_ALG_TYPE_AHASH_MASK | | |
479 | CRYPTO_ALG_ASYNC); | |
480 | if (IS_ERR(mac_alg)) | |
481 | return PTR_ERR(mac_alg); | |
4a49b499 | 482 | |
f15f05b0 | 483 | mac = __crypto_hash_alg_common(mac_alg); |
4a49b499 | 484 | err = -EINVAL; |
08869542 EB |
485 | if (strncmp(mac->base.cra_name, "cbcmac(", 7) != 0 || |
486 | mac->digestsize != 16) | |
f15f05b0 | 487 | goto out_put_mac; |
4a49b499 JL |
488 | |
489 | inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL); | |
490 | err = -ENOMEM; | |
491 | if (!inst) | |
f15f05b0 | 492 | goto out_put_mac; |
4a49b499 | 493 | |
81c4c35e | 494 | ictx = aead_instance_ctx(inst); |
f15f05b0 AB |
495 | err = crypto_init_ahash_spawn(&ictx->mac, mac, |
496 | aead_crypto_instance(inst)); | |
4a49b499 JL |
497 | if (err) |
498 | goto err_free_inst; | |
499 | ||
81c4c35e | 500 | crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst)); |
a35528ec EB |
501 | err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0, |
502 | crypto_requires_sync(algt->type, | |
503 | algt->mask)); | |
4a49b499 | 504 | if (err) |
f15f05b0 | 505 | goto err_drop_mac; |
4a49b499 | 506 | |
464b93a3 | 507 | ctr = crypto_spawn_skcipher_alg(&ictx->ctr); |
4a49b499 | 508 | |
08869542 | 509 | /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */ |
4a49b499 | 510 | err = -EINVAL; |
08869542 EB |
511 | if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 || |
512 | crypto_skcipher_alg_ivsize(ctr) != 16 || | |
513 | ctr->base.cra_blocksize != 1) | |
4a49b499 JL |
514 | goto err_drop_ctr; |
515 | ||
08869542 EB |
516 | /* ctr and cbcmac must use the same underlying block cipher. */ |
517 | if (strcmp(ctr->base.cra_name + 4, mac->base.cra_name + 7) != 0) | |
4a49b499 JL |
518 | goto err_drop_ctr; |
519 | ||
520 | err = -ENAMETOOLONG; | |
08869542 EB |
521 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
522 | "ccm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME) | |
523 | goto err_drop_ctr; | |
524 | ||
81c4c35e | 525 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
464b93a3 | 526 | "ccm_base(%s,%s)", ctr->base.cra_driver_name, |
f15f05b0 | 527 | mac->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
4a49b499 JL |
528 | goto err_drop_ctr; |
529 | ||
464b93a3 | 530 | inst->alg.base.cra_flags = ctr->base.cra_flags & CRYPTO_ALG_ASYNC; |
f15f05b0 | 531 | inst->alg.base.cra_priority = (mac->base.cra_priority + |
464b93a3 | 532 | ctr->base.cra_priority) / 2; |
81c4c35e | 533 | inst->alg.base.cra_blocksize = 1; |
f15f05b0 | 534 | inst->alg.base.cra_alignmask = mac->base.cra_alignmask | |
5ba8e2a0 | 535 | ctr->base.cra_alignmask; |
81c4c35e | 536 | inst->alg.ivsize = 16; |
464b93a3 | 537 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr); |
81c4c35e HX |
538 | inst->alg.maxauthsize = 16; |
539 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx); | |
540 | inst->alg.init = crypto_ccm_init_tfm; | |
541 | inst->alg.exit = crypto_ccm_exit_tfm; | |
542 | inst->alg.setkey = crypto_ccm_setkey; | |
543 | inst->alg.setauthsize = crypto_ccm_setauthsize; | |
544 | inst->alg.encrypt = crypto_ccm_encrypt; | |
545 | inst->alg.decrypt = crypto_ccm_decrypt; | |
546 | ||
547 | inst->free = crypto_ccm_free; | |
548 | ||
549 | err = aead_register_instance(tmpl, inst); | |
550 | if (err) | |
551 | goto err_drop_ctr; | |
4a49b499 | 552 | |
f15f05b0 AB |
553 | out_put_mac: |
554 | crypto_mod_put(mac_alg); | |
81c4c35e | 555 | return err; |
4a49b499 JL |
556 | |
557 | err_drop_ctr: | |
558 | crypto_drop_skcipher(&ictx->ctr); | |
f15f05b0 AB |
559 | err_drop_mac: |
560 | crypto_drop_ahash(&ictx->mac); | |
4a49b499 JL |
561 | err_free_inst: |
562 | kfree(inst); | |
f15f05b0 | 563 | goto out_put_mac; |
4a49b499 JL |
564 | } |
565 | ||
81c4c35e | 566 | static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb) |
4a49b499 | 567 | { |
4a49b499 JL |
568 | const char *cipher_name; |
569 | char ctr_name[CRYPTO_MAX_ALG_NAME]; | |
f15f05b0 | 570 | char mac_name[CRYPTO_MAX_ALG_NAME]; |
4a49b499 JL |
571 | |
572 | cipher_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 573 | if (IS_ERR(cipher_name)) |
81c4c35e | 574 | return PTR_ERR(cipher_name); |
4a49b499 JL |
575 | |
576 | if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", | |
577 | cipher_name) >= CRYPTO_MAX_ALG_NAME) | |
81c4c35e | 578 | return -ENAMETOOLONG; |
4a49b499 | 579 | |
f15f05b0 AB |
580 | if (snprintf(mac_name, CRYPTO_MAX_ALG_NAME, "cbcmac(%s)", |
581 | cipher_name) >= CRYPTO_MAX_ALG_NAME) | |
582 | return -ENAMETOOLONG; | |
583 | ||
08869542 | 584 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
4a49b499 JL |
585 | } |
586 | ||
587 | static struct crypto_template crypto_ccm_tmpl = { | |
588 | .name = "ccm", | |
81c4c35e | 589 | .create = crypto_ccm_create, |
4a49b499 JL |
590 | .module = THIS_MODULE, |
591 | }; | |
592 | ||
81c4c35e HX |
593 | static int crypto_ccm_base_create(struct crypto_template *tmpl, |
594 | struct rtattr **tb) | |
4a49b499 | 595 | { |
4a49b499 | 596 | const char *ctr_name; |
08869542 | 597 | const char *mac_name; |
4a49b499 JL |
598 | |
599 | ctr_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 600 | if (IS_ERR(ctr_name)) |
81c4c35e | 601 | return PTR_ERR(ctr_name); |
4a49b499 | 602 | |
08869542 EB |
603 | mac_name = crypto_attr_alg_name(tb[2]); |
604 | if (IS_ERR(mac_name)) | |
605 | return PTR_ERR(mac_name); | |
4a49b499 | 606 | |
08869542 | 607 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
4a49b499 JL |
608 | } |
609 | ||
610 | static struct crypto_template crypto_ccm_base_tmpl = { | |
611 | .name = "ccm_base", | |
81c4c35e | 612 | .create = crypto_ccm_base_create, |
4a49b499 JL |
613 | .module = THIS_MODULE, |
614 | }; | |
615 | ||
616 | static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key, | |
617 | unsigned int keylen) | |
618 | { | |
619 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); | |
620 | struct crypto_aead *child = ctx->child; | |
621 | int err; | |
622 | ||
623 | if (keylen < 3) | |
624 | return -EINVAL; | |
625 | ||
626 | keylen -= 3; | |
627 | memcpy(ctx->nonce, key + keylen, 3); | |
628 | ||
629 | crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK); | |
630 | crypto_aead_set_flags(child, crypto_aead_get_flags(parent) & | |
631 | CRYPTO_TFM_REQ_MASK); | |
632 | err = crypto_aead_setkey(child, key, keylen); | |
633 | crypto_aead_set_flags(parent, crypto_aead_get_flags(child) & | |
634 | CRYPTO_TFM_RES_MASK); | |
635 | ||
636 | return err; | |
637 | } | |
638 | ||
639 | static int crypto_rfc4309_setauthsize(struct crypto_aead *parent, | |
640 | unsigned int authsize) | |
641 | { | |
642 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); | |
643 | ||
644 | switch (authsize) { | |
645 | case 8: | |
646 | case 12: | |
647 | case 16: | |
648 | break; | |
649 | default: | |
650 | return -EINVAL; | |
651 | } | |
652 | ||
653 | return crypto_aead_setauthsize(ctx->child, authsize); | |
654 | } | |
655 | ||
656 | static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req) | |
657 | { | |
81c4c35e HX |
658 | struct crypto_rfc4309_req_ctx *rctx = aead_request_ctx(req); |
659 | struct aead_request *subreq = &rctx->subreq; | |
4a49b499 JL |
660 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
661 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(aead); | |
662 | struct crypto_aead *child = ctx->child; | |
81c4c35e | 663 | struct scatterlist *sg; |
4a49b499 JL |
664 | u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child), |
665 | crypto_aead_alignmask(child) + 1); | |
666 | ||
667 | /* L' */ | |
668 | iv[0] = 3; | |
669 | ||
670 | memcpy(iv + 1, ctx->nonce, 3); | |
671 | memcpy(iv + 4, req->iv, 8); | |
672 | ||
81c4c35e HX |
673 | scatterwalk_map_and_copy(iv + 16, req->src, 0, req->assoclen - 8, 0); |
674 | ||
675 | sg_init_table(rctx->src, 3); | |
676 | sg_set_buf(rctx->src, iv + 16, req->assoclen - 8); | |
677 | sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen); | |
678 | if (sg != rctx->src + 1) | |
679 | sg_chain(rctx->src, 2, sg); | |
680 | ||
681 | if (req->src != req->dst) { | |
682 | sg_init_table(rctx->dst, 3); | |
683 | sg_set_buf(rctx->dst, iv + 16, req->assoclen - 8); | |
684 | sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen); | |
685 | if (sg != rctx->dst + 1) | |
686 | sg_chain(rctx->dst, 2, sg); | |
687 | } | |
688 | ||
4a49b499 JL |
689 | aead_request_set_tfm(subreq, child); |
690 | aead_request_set_callback(subreq, req->base.flags, req->base.complete, | |
691 | req->base.data); | |
81c4c35e HX |
692 | aead_request_set_crypt(subreq, rctx->src, |
693 | req->src == req->dst ? rctx->src : rctx->dst, | |
694 | req->cryptlen, iv); | |
695 | aead_request_set_ad(subreq, req->assoclen - 8); | |
4a49b499 JL |
696 | |
697 | return subreq; | |
698 | } | |
699 | ||
700 | static int crypto_rfc4309_encrypt(struct aead_request *req) | |
701 | { | |
81c4c35e HX |
702 | if (req->assoclen != 16 && req->assoclen != 20) |
703 | return -EINVAL; | |
704 | ||
4a49b499 JL |
705 | req = crypto_rfc4309_crypt(req); |
706 | ||
707 | return crypto_aead_encrypt(req); | |
708 | } | |
709 | ||
710 | static int crypto_rfc4309_decrypt(struct aead_request *req) | |
711 | { | |
81c4c35e HX |
712 | if (req->assoclen != 16 && req->assoclen != 20) |
713 | return -EINVAL; | |
714 | ||
4a49b499 JL |
715 | req = crypto_rfc4309_crypt(req); |
716 | ||
717 | return crypto_aead_decrypt(req); | |
718 | } | |
719 | ||
81c4c35e | 720 | static int crypto_rfc4309_init_tfm(struct crypto_aead *tfm) |
4a49b499 | 721 | { |
81c4c35e HX |
722 | struct aead_instance *inst = aead_alg_instance(tfm); |
723 | struct crypto_aead_spawn *spawn = aead_instance_ctx(inst); | |
724 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); | |
4a49b499 JL |
725 | struct crypto_aead *aead; |
726 | unsigned long align; | |
727 | ||
728 | aead = crypto_spawn_aead(spawn); | |
729 | if (IS_ERR(aead)) | |
730 | return PTR_ERR(aead); | |
731 | ||
732 | ctx->child = aead; | |
733 | ||
734 | align = crypto_aead_alignmask(aead); | |
735 | align &= ~(crypto_tfm_ctx_alignment() - 1); | |
81c4c35e HX |
736 | crypto_aead_set_reqsize( |
737 | tfm, | |
738 | sizeof(struct crypto_rfc4309_req_ctx) + | |
2c221ad3 | 739 | ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) + |
81c4c35e | 740 | align + 32); |
4a49b499 JL |
741 | |
742 | return 0; | |
743 | } | |
744 | ||
81c4c35e | 745 | static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm) |
4a49b499 | 746 | { |
81c4c35e | 747 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); |
4a49b499 JL |
748 | |
749 | crypto_free_aead(ctx->child); | |
750 | } | |
751 | ||
81c4c35e HX |
752 | static void crypto_rfc4309_free(struct aead_instance *inst) |
753 | { | |
754 | crypto_drop_aead(aead_instance_ctx(inst)); | |
755 | kfree(inst); | |
756 | } | |
757 | ||
758 | static int crypto_rfc4309_create(struct crypto_template *tmpl, | |
759 | struct rtattr **tb) | |
4a49b499 JL |
760 | { |
761 | struct crypto_attr_type *algt; | |
81c4c35e | 762 | struct aead_instance *inst; |
4a49b499 | 763 | struct crypto_aead_spawn *spawn; |
81c4c35e | 764 | struct aead_alg *alg; |
4a49b499 JL |
765 | const char *ccm_name; |
766 | int err; | |
767 | ||
768 | algt = crypto_get_attr_type(tb); | |
4a49b499 | 769 | if (IS_ERR(algt)) |
81c4c35e | 770 | return PTR_ERR(algt); |
4a49b499 | 771 | |
5e4b8c1f | 772 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
81c4c35e | 773 | return -EINVAL; |
4a49b499 JL |
774 | |
775 | ccm_name = crypto_attr_alg_name(tb[1]); | |
4a49b499 | 776 | if (IS_ERR(ccm_name)) |
81c4c35e | 777 | return PTR_ERR(ccm_name); |
4a49b499 JL |
778 | |
779 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); | |
780 | if (!inst) | |
81c4c35e | 781 | return -ENOMEM; |
4a49b499 | 782 | |
81c4c35e HX |
783 | spawn = aead_instance_ctx(inst); |
784 | crypto_set_aead_spawn(spawn, aead_crypto_instance(inst)); | |
4a49b499 JL |
785 | err = crypto_grab_aead(spawn, ccm_name, 0, |
786 | crypto_requires_sync(algt->type, algt->mask)); | |
787 | if (err) | |
788 | goto out_free_inst; | |
789 | ||
81c4c35e | 790 | alg = crypto_spawn_aead_alg(spawn); |
4a49b499 JL |
791 | |
792 | err = -EINVAL; | |
793 | ||
794 | /* We only support 16-byte blocks. */ | |
81c4c35e | 795 | if (crypto_aead_alg_ivsize(alg) != 16) |
4a49b499 JL |
796 | goto out_drop_alg; |
797 | ||
798 | /* Not a stream cipher? */ | |
81c4c35e | 799 | if (alg->base.cra_blocksize != 1) |
4a49b499 JL |
800 | goto out_drop_alg; |
801 | ||
802 | err = -ENAMETOOLONG; | |
81c4c35e HX |
803 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
804 | "rfc4309(%s)", alg->base.cra_name) >= | |
805 | CRYPTO_MAX_ALG_NAME || | |
806 | snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
807 | "rfc4309(%s)", alg->base.cra_driver_name) >= | |
4a49b499 JL |
808 | CRYPTO_MAX_ALG_NAME) |
809 | goto out_drop_alg; | |
810 | ||
81c4c35e | 811 | inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; |
81c4c35e HX |
812 | inst->alg.base.cra_priority = alg->base.cra_priority; |
813 | inst->alg.base.cra_blocksize = 1; | |
814 | inst->alg.base.cra_alignmask = alg->base.cra_alignmask; | |
4a49b499 | 815 | |
81c4c35e | 816 | inst->alg.ivsize = 8; |
464b93a3 | 817 | inst->alg.chunksize = crypto_aead_alg_chunksize(alg); |
81c4c35e | 818 | inst->alg.maxauthsize = 16; |
4a49b499 | 819 | |
81c4c35e | 820 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx); |
4a49b499 | 821 | |
81c4c35e HX |
822 | inst->alg.init = crypto_rfc4309_init_tfm; |
823 | inst->alg.exit = crypto_rfc4309_exit_tfm; | |
4a49b499 | 824 | |
81c4c35e HX |
825 | inst->alg.setkey = crypto_rfc4309_setkey; |
826 | inst->alg.setauthsize = crypto_rfc4309_setauthsize; | |
827 | inst->alg.encrypt = crypto_rfc4309_encrypt; | |
828 | inst->alg.decrypt = crypto_rfc4309_decrypt; | |
4a49b499 | 829 | |
81c4c35e HX |
830 | inst->free = crypto_rfc4309_free; |
831 | ||
832 | err = aead_register_instance(tmpl, inst); | |
833 | if (err) | |
834 | goto out_drop_alg; | |
4a49b499 JL |
835 | |
836 | out: | |
81c4c35e | 837 | return err; |
4a49b499 JL |
838 | |
839 | out_drop_alg: | |
840 | crypto_drop_aead(spawn); | |
841 | out_free_inst: | |
842 | kfree(inst); | |
4a49b499 JL |
843 | goto out; |
844 | } | |
845 | ||
4a49b499 JL |
846 | static struct crypto_template crypto_rfc4309_tmpl = { |
847 | .name = "rfc4309", | |
81c4c35e | 848 | .create = crypto_rfc4309_create, |
4a49b499 JL |
849 | .module = THIS_MODULE, |
850 | }; | |
851 | ||
f15f05b0 AB |
852 | static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent, |
853 | const u8 *inkey, unsigned int keylen) | |
854 | { | |
855 | struct cbcmac_tfm_ctx *ctx = crypto_shash_ctx(parent); | |
856 | ||
857 | return crypto_cipher_setkey(ctx->child, inkey, keylen); | |
858 | } | |
859 | ||
860 | static int crypto_cbcmac_digest_init(struct shash_desc *pdesc) | |
861 | { | |
862 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
863 | int bs = crypto_shash_digestsize(pdesc->tfm); | |
5338ad70 | 864 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(pdesc->tfm) - bs; |
f15f05b0 AB |
865 | |
866 | ctx->len = 0; | |
5338ad70 | 867 | memset(dg, 0, bs); |
f15f05b0 AB |
868 | |
869 | return 0; | |
870 | } | |
871 | ||
872 | static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p, | |
873 | unsigned int len) | |
874 | { | |
875 | struct crypto_shash *parent = pdesc->tfm; | |
876 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); | |
877 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
878 | struct crypto_cipher *tfm = tctx->child; | |
879 | int bs = crypto_shash_digestsize(parent); | |
5338ad70 | 880 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; |
f15f05b0 AB |
881 | |
882 | while (len > 0) { | |
883 | unsigned int l = min(len, bs - ctx->len); | |
884 | ||
5338ad70 | 885 | crypto_xor(dg + ctx->len, p, l); |
f15f05b0 AB |
886 | ctx->len +=l; |
887 | len -= l; | |
888 | p += l; | |
889 | ||
890 | if (ctx->len == bs) { | |
5338ad70 | 891 | crypto_cipher_encrypt_one(tfm, dg, dg); |
f15f05b0 AB |
892 | ctx->len = 0; |
893 | } | |
894 | } | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out) | |
900 | { | |
901 | struct crypto_shash *parent = pdesc->tfm; | |
902 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); | |
903 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); | |
904 | struct crypto_cipher *tfm = tctx->child; | |
905 | int bs = crypto_shash_digestsize(parent); | |
5338ad70 | 906 | u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs; |
f15f05b0 AB |
907 | |
908 | if (ctx->len) | |
5338ad70 | 909 | crypto_cipher_encrypt_one(tfm, dg, dg); |
f15f05b0 | 910 | |
5338ad70 | 911 | memcpy(out, dg, bs); |
f15f05b0 AB |
912 | return 0; |
913 | } | |
914 | ||
915 | static int cbcmac_init_tfm(struct crypto_tfm *tfm) | |
916 | { | |
917 | struct crypto_cipher *cipher; | |
918 | struct crypto_instance *inst = (void *)tfm->__crt_alg; | |
919 | struct crypto_spawn *spawn = crypto_instance_ctx(inst); | |
920 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); | |
921 | ||
922 | cipher = crypto_spawn_cipher(spawn); | |
923 | if (IS_ERR(cipher)) | |
924 | return PTR_ERR(cipher); | |
925 | ||
926 | ctx->child = cipher; | |
927 | ||
928 | return 0; | |
929 | }; | |
930 | ||
931 | static void cbcmac_exit_tfm(struct crypto_tfm *tfm) | |
932 | { | |
933 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); | |
934 | crypto_free_cipher(ctx->child); | |
935 | } | |
936 | ||
937 | static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb) | |
938 | { | |
939 | struct shash_instance *inst; | |
940 | struct crypto_alg *alg; | |
941 | int err; | |
942 | ||
943 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH); | |
944 | if (err) | |
945 | return err; | |
946 | ||
947 | alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, | |
948 | CRYPTO_ALG_TYPE_MASK); | |
949 | if (IS_ERR(alg)) | |
950 | return PTR_ERR(alg); | |
951 | ||
952 | inst = shash_alloc_instance("cbcmac", alg); | |
953 | err = PTR_ERR(inst); | |
954 | if (IS_ERR(inst)) | |
955 | goto out_put_alg; | |
956 | ||
957 | err = crypto_init_spawn(shash_instance_ctx(inst), alg, | |
958 | shash_crypto_instance(inst), | |
959 | CRYPTO_ALG_TYPE_MASK); | |
960 | if (err) | |
961 | goto out_free_inst; | |
962 | ||
963 | inst->alg.base.cra_priority = alg->cra_priority; | |
964 | inst->alg.base.cra_blocksize = 1; | |
965 | ||
966 | inst->alg.digestsize = alg->cra_blocksize; | |
5338ad70 AB |
967 | inst->alg.descsize = ALIGN(sizeof(struct cbcmac_desc_ctx), |
968 | alg->cra_alignmask + 1) + | |
f15f05b0 AB |
969 | alg->cra_blocksize; |
970 | ||
971 | inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx); | |
972 | inst->alg.base.cra_init = cbcmac_init_tfm; | |
973 | inst->alg.base.cra_exit = cbcmac_exit_tfm; | |
974 | ||
975 | inst->alg.init = crypto_cbcmac_digest_init; | |
976 | inst->alg.update = crypto_cbcmac_digest_update; | |
977 | inst->alg.final = crypto_cbcmac_digest_final; | |
978 | inst->alg.setkey = crypto_cbcmac_digest_setkey; | |
979 | ||
980 | err = shash_register_instance(tmpl, inst); | |
981 | ||
982 | out_free_inst: | |
983 | if (err) | |
984 | shash_free_instance(shash_crypto_instance(inst)); | |
985 | ||
986 | out_put_alg: | |
987 | crypto_mod_put(alg); | |
988 | return err; | |
989 | } | |
990 | ||
991 | static struct crypto_template crypto_cbcmac_tmpl = { | |
992 | .name = "cbcmac", | |
993 | .create = cbcmac_create, | |
994 | .free = shash_free_instance, | |
995 | .module = THIS_MODULE, | |
996 | }; | |
997 | ||
4a49b499 JL |
998 | static int __init crypto_ccm_module_init(void) |
999 | { | |
1000 | int err; | |
1001 | ||
f15f05b0 | 1002 | err = crypto_register_template(&crypto_cbcmac_tmpl); |
4a49b499 JL |
1003 | if (err) |
1004 | goto out; | |
1005 | ||
f15f05b0 AB |
1006 | err = crypto_register_template(&crypto_ccm_base_tmpl); |
1007 | if (err) | |
1008 | goto out_undo_cbcmac; | |
1009 | ||
4a49b499 JL |
1010 | err = crypto_register_template(&crypto_ccm_tmpl); |
1011 | if (err) | |
1012 | goto out_undo_base; | |
1013 | ||
1014 | err = crypto_register_template(&crypto_rfc4309_tmpl); | |
1015 | if (err) | |
1016 | goto out_undo_ccm; | |
1017 | ||
1018 | out: | |
1019 | return err; | |
1020 | ||
1021 | out_undo_ccm: | |
1022 | crypto_unregister_template(&crypto_ccm_tmpl); | |
1023 | out_undo_base: | |
1024 | crypto_unregister_template(&crypto_ccm_base_tmpl); | |
f15f05b0 AB |
1025 | out_undo_cbcmac: |
1026 | crypto_register_template(&crypto_cbcmac_tmpl); | |
4a49b499 JL |
1027 | goto out; |
1028 | } | |
1029 | ||
1030 | static void __exit crypto_ccm_module_exit(void) | |
1031 | { | |
1032 | crypto_unregister_template(&crypto_rfc4309_tmpl); | |
1033 | crypto_unregister_template(&crypto_ccm_tmpl); | |
1034 | crypto_unregister_template(&crypto_ccm_base_tmpl); | |
f15f05b0 | 1035 | crypto_unregister_template(&crypto_cbcmac_tmpl); |
4a49b499 JL |
1036 | } |
1037 | ||
1038 | module_init(crypto_ccm_module_init); | |
1039 | module_exit(crypto_ccm_module_exit); | |
1040 | ||
1041 | MODULE_LICENSE("GPL"); | |
1042 | MODULE_DESCRIPTION("Counter with CBC MAC"); | |
5d26a105 KC |
1043 | MODULE_ALIAS_CRYPTO("ccm_base"); |
1044 | MODULE_ALIAS_CRYPTO("rfc4309"); | |
4943ba16 | 1045 | MODULE_ALIAS_CRYPTO("ccm"); |