Commit | Line | Data |
---|---|---|
a716c119 | 1 | /* |
1da177e4 LT |
2 | * xfrm algorithm interface |
3 | * | |
4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
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 | |
a716c119 | 8 | * Software Foundation; either version 2 of the License, or (at your option) |
1da177e4 LT |
9 | * any later version. |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/module.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/pfkeyv2.h> | |
15 | #include <linux/crypto.h> | |
b3b724f4 | 16 | #include <linux/scatterlist.h> |
1da177e4 LT |
17 | #include <net/xfrm.h> |
18 | #if defined(CONFIG_INET_AH) || defined(CONFIG_INET_AH_MODULE) || defined(CONFIG_INET6_AH) || defined(CONFIG_INET6_AH_MODULE) | |
19 | #include <net/ah.h> | |
20 | #endif | |
21 | #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) | |
22 | #include <net/esp.h> | |
23 | #endif | |
1da177e4 LT |
24 | |
25 | /* | |
26 | * Algorithms supported by IPsec. These entries contain properties which | |
27 | * are used in key negotiation and xfrm processing, and are used to verify | |
28 | * that instantiated crypto transforms have correct parameters for IPsec | |
29 | * purposes. | |
30 | */ | |
1a6509d9 HX |
31 | static struct xfrm_algo_desc aead_list[] = { |
32 | { | |
33 | .name = "rfc4106(gcm(aes))", | |
34 | ||
35 | .uinfo = { | |
36 | .aead = { | |
37 | .icv_truncbits = 64, | |
38 | } | |
39 | }, | |
40 | ||
41 | .desc = { | |
42 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8, | |
43 | .sadb_alg_ivlen = 8, | |
44 | .sadb_alg_minbits = 128, | |
45 | .sadb_alg_maxbits = 256 | |
46 | } | |
47 | }, | |
48 | { | |
49 | .name = "rfc4106(gcm(aes))", | |
50 | ||
51 | .uinfo = { | |
52 | .aead = { | |
53 | .icv_truncbits = 96, | |
54 | } | |
55 | }, | |
56 | ||
57 | .desc = { | |
58 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, | |
59 | .sadb_alg_ivlen = 8, | |
60 | .sadb_alg_minbits = 128, | |
61 | .sadb_alg_maxbits = 256 | |
62 | } | |
63 | }, | |
64 | { | |
65 | .name = "rfc4106(gcm(aes))", | |
66 | ||
67 | .uinfo = { | |
68 | .aead = { | |
69 | .icv_truncbits = 128, | |
70 | } | |
71 | }, | |
72 | ||
73 | .desc = { | |
74 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, | |
75 | .sadb_alg_ivlen = 8, | |
76 | .sadb_alg_minbits = 128, | |
77 | .sadb_alg_maxbits = 256 | |
78 | } | |
79 | }, | |
80 | { | |
81 | .name = "rfc4309(ccm(aes))", | |
82 | ||
83 | .uinfo = { | |
84 | .aead = { | |
85 | .icv_truncbits = 64, | |
86 | } | |
87 | }, | |
88 | ||
89 | .desc = { | |
90 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, | |
91 | .sadb_alg_ivlen = 8, | |
92 | .sadb_alg_minbits = 128, | |
93 | .sadb_alg_maxbits = 256 | |
94 | } | |
95 | }, | |
96 | { | |
97 | .name = "rfc4309(ccm(aes))", | |
98 | ||
99 | .uinfo = { | |
100 | .aead = { | |
101 | .icv_truncbits = 96, | |
102 | } | |
103 | }, | |
104 | ||
105 | .desc = { | |
106 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, | |
107 | .sadb_alg_ivlen = 8, | |
108 | .sadb_alg_minbits = 128, | |
109 | .sadb_alg_maxbits = 256 | |
110 | } | |
111 | }, | |
112 | { | |
113 | .name = "rfc4309(ccm(aes))", | |
114 | ||
115 | .uinfo = { | |
116 | .aead = { | |
117 | .icv_truncbits = 128, | |
118 | } | |
119 | }, | |
120 | ||
121 | .desc = { | |
122 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, | |
123 | .sadb_alg_ivlen = 8, | |
124 | .sadb_alg_minbits = 128, | |
125 | .sadb_alg_maxbits = 256 | |
126 | } | |
127 | }, | |
73c89c15 TB |
128 | { |
129 | .name = "rfc4543(gcm(aes))", | |
130 | ||
131 | .uinfo = { | |
132 | .aead = { | |
133 | .icv_truncbits = 128, | |
134 | } | |
135 | }, | |
136 | ||
137 | .desc = { | |
138 | .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC, | |
139 | .sadb_alg_ivlen = 8, | |
140 | .sadb_alg_minbits = 128, | |
141 | .sadb_alg_maxbits = 256 | |
142 | } | |
143 | }, | |
1a6509d9 HX |
144 | }; |
145 | ||
1da177e4 LT |
146 | static struct xfrm_algo_desc aalg_list[] = { |
147 | { | |
01a2202c | 148 | .name = "digest_null", |
a716c119 | 149 | |
1da177e4 LT |
150 | .uinfo = { |
151 | .auth = { | |
152 | .icv_truncbits = 0, | |
153 | .icv_fullbits = 0, | |
154 | } | |
155 | }, | |
a716c119 | 156 | |
1da177e4 LT |
157 | .desc = { |
158 | .sadb_alg_id = SADB_X_AALG_NULL, | |
159 | .sadb_alg_ivlen = 0, | |
160 | .sadb_alg_minbits = 0, | |
161 | .sadb_alg_maxbits = 0 | |
162 | } | |
163 | }, | |
164 | { | |
07d4ee58 HX |
165 | .name = "hmac(md5)", |
166 | .compat = "md5", | |
1da177e4 LT |
167 | |
168 | .uinfo = { | |
169 | .auth = { | |
170 | .icv_truncbits = 96, | |
171 | .icv_fullbits = 128, | |
172 | } | |
173 | }, | |
a716c119 | 174 | |
1da177e4 LT |
175 | .desc = { |
176 | .sadb_alg_id = SADB_AALG_MD5HMAC, | |
177 | .sadb_alg_ivlen = 0, | |
178 | .sadb_alg_minbits = 128, | |
179 | .sadb_alg_maxbits = 128 | |
180 | } | |
181 | }, | |
182 | { | |
07d4ee58 HX |
183 | .name = "hmac(sha1)", |
184 | .compat = "sha1", | |
1da177e4 LT |
185 | |
186 | .uinfo = { | |
187 | .auth = { | |
188 | .icv_truncbits = 96, | |
189 | .icv_fullbits = 160, | |
190 | } | |
191 | }, | |
192 | ||
193 | .desc = { | |
194 | .sadb_alg_id = SADB_AALG_SHA1HMAC, | |
195 | .sadb_alg_ivlen = 0, | |
196 | .sadb_alg_minbits = 160, | |
197 | .sadb_alg_maxbits = 160 | |
198 | } | |
199 | }, | |
200 | { | |
07d4ee58 HX |
201 | .name = "hmac(sha256)", |
202 | .compat = "sha256", | |
1da177e4 LT |
203 | |
204 | .uinfo = { | |
205 | .auth = { | |
206 | .icv_truncbits = 96, | |
207 | .icv_fullbits = 256, | |
208 | } | |
209 | }, | |
210 | ||
211 | .desc = { | |
212 | .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC, | |
213 | .sadb_alg_ivlen = 0, | |
214 | .sadb_alg_minbits = 256, | |
215 | .sadb_alg_maxbits = 256 | |
216 | } | |
217 | }, | |
bc74b0c8 MW |
218 | { |
219 | .name = "hmac(sha384)", | |
220 | ||
221 | .uinfo = { | |
222 | .auth = { | |
223 | .icv_truncbits = 192, | |
224 | .icv_fullbits = 384, | |
225 | } | |
226 | }, | |
227 | ||
228 | .desc = { | |
229 | .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC, | |
230 | .sadb_alg_ivlen = 0, | |
231 | .sadb_alg_minbits = 384, | |
232 | .sadb_alg_maxbits = 384 | |
233 | } | |
234 | }, | |
235 | { | |
236 | .name = "hmac(sha512)", | |
237 | ||
238 | .uinfo = { | |
239 | .auth = { | |
240 | .icv_truncbits = 256, | |
241 | .icv_fullbits = 512, | |
242 | } | |
243 | }, | |
244 | ||
245 | .desc = { | |
246 | .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC, | |
247 | .sadb_alg_ivlen = 0, | |
248 | .sadb_alg_minbits = 512, | |
249 | .sadb_alg_maxbits = 512 | |
250 | } | |
251 | }, | |
1da177e4 | 252 | { |
a13366c6 AKR |
253 | .name = "hmac(rmd160)", |
254 | .compat = "rmd160", | |
1da177e4 LT |
255 | |
256 | .uinfo = { | |
257 | .auth = { | |
258 | .icv_truncbits = 96, | |
259 | .icv_fullbits = 160, | |
260 | } | |
261 | }, | |
262 | ||
263 | .desc = { | |
264 | .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC, | |
265 | .sadb_alg_ivlen = 0, | |
266 | .sadb_alg_minbits = 160, | |
267 | .sadb_alg_maxbits = 160 | |
268 | } | |
269 | }, | |
7cf4c1a5 KM |
270 | { |
271 | .name = "xcbc(aes)", | |
272 | ||
273 | .uinfo = { | |
274 | .auth = { | |
275 | .icv_truncbits = 96, | |
276 | .icv_fullbits = 128, | |
277 | } | |
278 | }, | |
279 | ||
280 | .desc = { | |
281 | .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC, | |
282 | .sadb_alg_ivlen = 0, | |
283 | .sadb_alg_minbits = 128, | |
284 | .sadb_alg_maxbits = 128 | |
285 | } | |
286 | }, | |
1da177e4 LT |
287 | }; |
288 | ||
289 | static struct xfrm_algo_desc ealg_list[] = { | |
290 | { | |
6b7326c8 HX |
291 | .name = "ecb(cipher_null)", |
292 | .compat = "cipher_null", | |
a716c119 | 293 | |
1da177e4 LT |
294 | .uinfo = { |
295 | .encr = { | |
296 | .blockbits = 8, | |
297 | .defkeybits = 0, | |
298 | } | |
299 | }, | |
a716c119 | 300 | |
1da177e4 LT |
301 | .desc = { |
302 | .sadb_alg_id = SADB_EALG_NULL, | |
303 | .sadb_alg_ivlen = 0, | |
304 | .sadb_alg_minbits = 0, | |
305 | .sadb_alg_maxbits = 0 | |
306 | } | |
307 | }, | |
308 | { | |
6b7326c8 HX |
309 | .name = "cbc(des)", |
310 | .compat = "des", | |
1da177e4 LT |
311 | |
312 | .uinfo = { | |
313 | .encr = { | |
314 | .blockbits = 64, | |
315 | .defkeybits = 64, | |
316 | } | |
317 | }, | |
318 | ||
319 | .desc = { | |
320 | .sadb_alg_id = SADB_EALG_DESCBC, | |
321 | .sadb_alg_ivlen = 8, | |
322 | .sadb_alg_minbits = 64, | |
323 | .sadb_alg_maxbits = 64 | |
324 | } | |
325 | }, | |
326 | { | |
6b7326c8 HX |
327 | .name = "cbc(des3_ede)", |
328 | .compat = "des3_ede", | |
1da177e4 LT |
329 | |
330 | .uinfo = { | |
331 | .encr = { | |
332 | .blockbits = 64, | |
333 | .defkeybits = 192, | |
334 | } | |
335 | }, | |
336 | ||
337 | .desc = { | |
338 | .sadb_alg_id = SADB_EALG_3DESCBC, | |
339 | .sadb_alg_ivlen = 8, | |
340 | .sadb_alg_minbits = 192, | |
341 | .sadb_alg_maxbits = 192 | |
342 | } | |
343 | }, | |
344 | { | |
245acb87 HX |
345 | .name = "cbc(cast5)", |
346 | .compat = "cast5", | |
1da177e4 LT |
347 | |
348 | .uinfo = { | |
349 | .encr = { | |
350 | .blockbits = 64, | |
351 | .defkeybits = 128, | |
352 | } | |
353 | }, | |
354 | ||
355 | .desc = { | |
356 | .sadb_alg_id = SADB_X_EALG_CASTCBC, | |
357 | .sadb_alg_ivlen = 8, | |
358 | .sadb_alg_minbits = 40, | |
359 | .sadb_alg_maxbits = 128 | |
360 | } | |
361 | }, | |
362 | { | |
6b7326c8 HX |
363 | .name = "cbc(blowfish)", |
364 | .compat = "blowfish", | |
1da177e4 LT |
365 | |
366 | .uinfo = { | |
367 | .encr = { | |
368 | .blockbits = 64, | |
369 | .defkeybits = 128, | |
370 | } | |
371 | }, | |
372 | ||
373 | .desc = { | |
374 | .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC, | |
375 | .sadb_alg_ivlen = 8, | |
376 | .sadb_alg_minbits = 40, | |
377 | .sadb_alg_maxbits = 448 | |
378 | } | |
379 | }, | |
380 | { | |
6b7326c8 HX |
381 | .name = "cbc(aes)", |
382 | .compat = "aes", | |
1da177e4 LT |
383 | |
384 | .uinfo = { | |
385 | .encr = { | |
386 | .blockbits = 128, | |
387 | .defkeybits = 128, | |
388 | } | |
389 | }, | |
390 | ||
391 | .desc = { | |
392 | .sadb_alg_id = SADB_X_EALG_AESCBC, | |
393 | .sadb_alg_ivlen = 8, | |
394 | .sadb_alg_minbits = 128, | |
395 | .sadb_alg_maxbits = 256 | |
396 | } | |
397 | }, | |
398 | { | |
a716c119 YH |
399 | .name = "cbc(serpent)", |
400 | .compat = "serpent", | |
401 | ||
402 | .uinfo = { | |
403 | .encr = { | |
404 | .blockbits = 128, | |
405 | .defkeybits = 128, | |
406 | } | |
407 | }, | |
408 | ||
409 | .desc = { | |
410 | .sadb_alg_id = SADB_X_EALG_SERPENTCBC, | |
411 | .sadb_alg_ivlen = 8, | |
412 | .sadb_alg_minbits = 128, | |
413 | .sadb_alg_maxbits = 256, | |
414 | } | |
1da177e4 | 415 | }, |
6a0dc8d7 NT |
416 | { |
417 | .name = "cbc(camellia)", | |
138f3c85 | 418 | .compat = "camellia", |
6a0dc8d7 NT |
419 | |
420 | .uinfo = { | |
421 | .encr = { | |
422 | .blockbits = 128, | |
423 | .defkeybits = 128, | |
424 | } | |
425 | }, | |
426 | ||
427 | .desc = { | |
428 | .sadb_alg_id = SADB_X_EALG_CAMELLIACBC, | |
429 | .sadb_alg_ivlen = 8, | |
430 | .sadb_alg_minbits = 128, | |
431 | .sadb_alg_maxbits = 256 | |
432 | } | |
433 | }, | |
1da177e4 | 434 | { |
a716c119 YH |
435 | .name = "cbc(twofish)", |
436 | .compat = "twofish", | |
437 | ||
438 | .uinfo = { | |
439 | .encr = { | |
440 | .blockbits = 128, | |
441 | .defkeybits = 128, | |
442 | } | |
443 | }, | |
444 | ||
445 | .desc = { | |
446 | .sadb_alg_id = SADB_X_EALG_TWOFISHCBC, | |
447 | .sadb_alg_ivlen = 8, | |
448 | .sadb_alg_minbits = 128, | |
449 | .sadb_alg_maxbits = 256 | |
450 | } | |
1da177e4 | 451 | }, |
405137d1 JL |
452 | { |
453 | .name = "rfc3686(ctr(aes))", | |
454 | ||
455 | .uinfo = { | |
456 | .encr = { | |
457 | .blockbits = 128, | |
458 | .defkeybits = 160, /* 128-bit key + 32-bit nonce */ | |
459 | } | |
460 | }, | |
461 | ||
462 | .desc = { | |
463 | .sadb_alg_id = SADB_X_EALG_AESCTR, | |
464 | .sadb_alg_ivlen = 8, | |
465 | .sadb_alg_minbits = 128, | |
466 | .sadb_alg_maxbits = 256 | |
467 | } | |
468 | }, | |
1da177e4 LT |
469 | }; |
470 | ||
471 | static struct xfrm_algo_desc calg_list[] = { | |
472 | { | |
473 | .name = "deflate", | |
474 | .uinfo = { | |
475 | .comp = { | |
476 | .threshold = 90, | |
477 | } | |
478 | }, | |
479 | .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE } | |
480 | }, | |
481 | { | |
482 | .name = "lzs", | |
483 | .uinfo = { | |
484 | .comp = { | |
485 | .threshold = 90, | |
486 | } | |
487 | }, | |
488 | .desc = { .sadb_alg_id = SADB_X_CALG_LZS } | |
489 | }, | |
490 | { | |
491 | .name = "lzjh", | |
492 | .uinfo = { | |
493 | .comp = { | |
494 | .threshold = 50, | |
495 | } | |
496 | }, | |
497 | .desc = { .sadb_alg_id = SADB_X_CALG_LZJH } | |
498 | }, | |
499 | }; | |
500 | ||
1a6509d9 HX |
501 | static inline int aead_entries(void) |
502 | { | |
503 | return ARRAY_SIZE(aead_list); | |
504 | } | |
505 | ||
1da177e4 LT |
506 | static inline int aalg_entries(void) |
507 | { | |
508 | return ARRAY_SIZE(aalg_list); | |
509 | } | |
510 | ||
511 | static inline int ealg_entries(void) | |
512 | { | |
513 | return ARRAY_SIZE(ealg_list); | |
514 | } | |
515 | ||
516 | static inline int calg_entries(void) | |
517 | { | |
518 | return ARRAY_SIZE(calg_list); | |
519 | } | |
520 | ||
c92b3a2f HX |
521 | struct xfrm_algo_list { |
522 | struct xfrm_algo_desc *algs; | |
523 | int entries; | |
524 | u32 type; | |
525 | u32 mask; | |
526 | }; | |
1da177e4 | 527 | |
1a6509d9 HX |
528 | static const struct xfrm_algo_list xfrm_aead_list = { |
529 | .algs = aead_list, | |
530 | .entries = ARRAY_SIZE(aead_list), | |
531 | .type = CRYPTO_ALG_TYPE_AEAD, | |
532 | .mask = CRYPTO_ALG_TYPE_MASK, | |
533 | }; | |
534 | ||
c92b3a2f HX |
535 | static const struct xfrm_algo_list xfrm_aalg_list = { |
536 | .algs = aalg_list, | |
537 | .entries = ARRAY_SIZE(aalg_list), | |
538 | .type = CRYPTO_ALG_TYPE_HASH, | |
6fbf2cb7 | 539 | .mask = CRYPTO_ALG_TYPE_HASH_MASK, |
c92b3a2f | 540 | }; |
1da177e4 | 541 | |
c92b3a2f HX |
542 | static const struct xfrm_algo_list xfrm_ealg_list = { |
543 | .algs = ealg_list, | |
544 | .entries = ARRAY_SIZE(ealg_list), | |
545 | .type = CRYPTO_ALG_TYPE_BLKCIPHER, | |
6fbf2cb7 | 546 | .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK, |
c92b3a2f | 547 | }; |
1da177e4 | 548 | |
c92b3a2f HX |
549 | static const struct xfrm_algo_list xfrm_calg_list = { |
550 | .algs = calg_list, | |
551 | .entries = ARRAY_SIZE(calg_list), | |
552 | .type = CRYPTO_ALG_TYPE_COMPRESS, | |
6fbf2cb7 | 553 | .mask = CRYPTO_ALG_TYPE_MASK, |
c92b3a2f | 554 | }; |
1da177e4 | 555 | |
c92b3a2f HX |
556 | static struct xfrm_algo_desc *xfrm_find_algo( |
557 | const struct xfrm_algo_list *algo_list, | |
558 | int match(const struct xfrm_algo_desc *entry, const void *data), | |
559 | const void *data, int probe) | |
1da177e4 | 560 | { |
c92b3a2f | 561 | struct xfrm_algo_desc *list = algo_list->algs; |
1da177e4 LT |
562 | int i, status; |
563 | ||
c92b3a2f HX |
564 | for (i = 0; i < algo_list->entries; i++) { |
565 | if (!match(list + i, data)) | |
1da177e4 LT |
566 | continue; |
567 | ||
568 | if (list[i].available) | |
569 | return &list[i]; | |
570 | ||
571 | if (!probe) | |
572 | break; | |
573 | ||
c92b3a2f HX |
574 | status = crypto_has_alg(list[i].name, algo_list->type, |
575 | algo_list->mask); | |
1da177e4 LT |
576 | if (!status) |
577 | break; | |
578 | ||
579 | list[i].available = status; | |
580 | return &list[i]; | |
581 | } | |
582 | return NULL; | |
583 | } | |
584 | ||
c92b3a2f HX |
585 | static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry, |
586 | const void *data) | |
587 | { | |
26b8e51e | 588 | return entry->desc.sadb_alg_id == (unsigned long)data; |
c92b3a2f HX |
589 | } |
590 | ||
591 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id) | |
592 | { | |
593 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match, | |
26b8e51e | 594 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
595 | } |
596 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid); | |
597 | ||
598 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id) | |
599 | { | |
600 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match, | |
26b8e51e | 601 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
602 | } |
603 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid); | |
604 | ||
605 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id) | |
606 | { | |
607 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match, | |
26b8e51e | 608 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
609 | } |
610 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byid); | |
611 | ||
612 | static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry, | |
613 | const void *data) | |
614 | { | |
615 | const char *name = data; | |
616 | ||
617 | return name && (!strcmp(name, entry->name) || | |
618 | (entry->compat && !strcmp(name, entry->compat))); | |
619 | } | |
620 | ||
1da177e4 LT |
621 | struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe) |
622 | { | |
c92b3a2f HX |
623 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name, |
624 | probe); | |
1da177e4 LT |
625 | } |
626 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname); | |
627 | ||
628 | struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe) | |
629 | { | |
c92b3a2f HX |
630 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name, |
631 | probe); | |
1da177e4 LT |
632 | } |
633 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname); | |
634 | ||
635 | struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe) | |
636 | { | |
c92b3a2f HX |
637 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name, |
638 | probe); | |
1da177e4 LT |
639 | } |
640 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byname); | |
641 | ||
1a6509d9 HX |
642 | struct xfrm_aead_name { |
643 | const char *name; | |
644 | int icvbits; | |
645 | }; | |
646 | ||
647 | static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry, | |
648 | const void *data) | |
649 | { | |
650 | const struct xfrm_aead_name *aead = data; | |
651 | const char *name = aead->name; | |
652 | ||
653 | return aead->icvbits == entry->uinfo.aead.icv_truncbits && name && | |
654 | !strcmp(name, entry->name); | |
655 | } | |
656 | ||
657 | struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, int probe) | |
658 | { | |
659 | struct xfrm_aead_name data = { | |
660 | .name = name, | |
661 | .icvbits = icv_len, | |
662 | }; | |
663 | ||
664 | return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data, | |
665 | probe); | |
666 | } | |
667 | EXPORT_SYMBOL_GPL(xfrm_aead_get_byname); | |
668 | ||
1da177e4 LT |
669 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx) |
670 | { | |
671 | if (idx >= aalg_entries()) | |
672 | return NULL; | |
673 | ||
674 | return &aalg_list[idx]; | |
675 | } | |
676 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx); | |
677 | ||
678 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx) | |
679 | { | |
680 | if (idx >= ealg_entries()) | |
681 | return NULL; | |
682 | ||
683 | return &ealg_list[idx]; | |
684 | } | |
685 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx); | |
686 | ||
687 | /* | |
688 | * Probe for the availability of crypto algorithms, and set the available | |
689 | * flag for any algorithms found on the system. This is typically called by | |
690 | * pfkey during userspace SA add, update or register. | |
691 | */ | |
692 | void xfrm_probe_algs(void) | |
693 | { | |
1da177e4 | 694 | int i, status; |
a716c119 | 695 | |
1da177e4 LT |
696 | BUG_ON(in_softirq()); |
697 | ||
698 | for (i = 0; i < aalg_entries(); i++) { | |
e4d5b79c HX |
699 | status = crypto_has_hash(aalg_list[i].name, 0, |
700 | CRYPTO_ALG_ASYNC); | |
1da177e4 LT |
701 | if (aalg_list[i].available != status) |
702 | aalg_list[i].available = status; | |
703 | } | |
a716c119 | 704 | |
1da177e4 | 705 | for (i = 0; i < ealg_entries(); i++) { |
e4d5b79c HX |
706 | status = crypto_has_blkcipher(ealg_list[i].name, 0, |
707 | CRYPTO_ALG_ASYNC); | |
1da177e4 LT |
708 | if (ealg_list[i].available != status) |
709 | ealg_list[i].available = status; | |
710 | } | |
a716c119 | 711 | |
1da177e4 | 712 | for (i = 0; i < calg_entries(); i++) { |
e4d5b79c HX |
713 | status = crypto_has_comp(calg_list[i].name, 0, |
714 | CRYPTO_ALG_ASYNC); | |
1da177e4 LT |
715 | if (calg_list[i].available != status) |
716 | calg_list[i].available = status; | |
717 | } | |
1da177e4 LT |
718 | } |
719 | EXPORT_SYMBOL_GPL(xfrm_probe_algs); | |
720 | ||
721 | int xfrm_count_auth_supported(void) | |
722 | { | |
723 | int i, n; | |
724 | ||
725 | for (i = 0, n = 0; i < aalg_entries(); i++) | |
726 | if (aalg_list[i].available) | |
727 | n++; | |
728 | return n; | |
729 | } | |
730 | EXPORT_SYMBOL_GPL(xfrm_count_auth_supported); | |
731 | ||
732 | int xfrm_count_enc_supported(void) | |
733 | { | |
734 | int i, n; | |
735 | ||
736 | for (i = 0, n = 0; i < ealg_entries(); i++) | |
737 | if (ealg_list[i].available) | |
738 | n++; | |
739 | return n; | |
740 | } | |
741 | EXPORT_SYMBOL_GPL(xfrm_count_enc_supported); | |
742 | ||
1da177e4 LT |
743 | #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) |
744 | ||
1da177e4 LT |
745 | void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len) |
746 | { | |
747 | if (tail != skb) { | |
748 | skb->data_len += len; | |
749 | skb->len += len; | |
750 | } | |
751 | return skb_put(tail, len); | |
752 | } | |
753 | EXPORT_SYMBOL_GPL(pskb_put); | |
754 | #endif |