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