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Commit | Line | Data |
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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 | 17 | #include <net/xfrm.h> |
1da177e4 LT |
18 | #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) |
19 | #include <net/esp.h> | |
20 | #endif | |
1da177e4 LT |
21 | |
22 | /* | |
23 | * Algorithms supported by IPsec. These entries contain properties which | |
24 | * are used in key negotiation and xfrm processing, and are used to verify | |
25 | * that instantiated crypto transforms have correct parameters for IPsec | |
26 | * purposes. | |
27 | */ | |
1a6509d9 HX |
28 | static struct xfrm_algo_desc aead_list[] = { |
29 | { | |
30 | .name = "rfc4106(gcm(aes))", | |
31 | ||
32 | .uinfo = { | |
33 | .aead = { | |
165ecc63 | 34 | .geniv = "seqniv", |
1a6509d9 HX |
35 | .icv_truncbits = 64, |
36 | } | |
37 | }, | |
38 | ||
7e50f84c JK |
39 | .pfkey_supported = 1, |
40 | ||
1a6509d9 HX |
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 = { | |
165ecc63 | 53 | .geniv = "seqniv", |
1a6509d9 HX |
54 | .icv_truncbits = 96, |
55 | } | |
56 | }, | |
57 | ||
7e50f84c JK |
58 | .pfkey_supported = 1, |
59 | ||
1a6509d9 HX |
60 | .desc = { |
61 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, | |
62 | .sadb_alg_ivlen = 8, | |
63 | .sadb_alg_minbits = 128, | |
64 | .sadb_alg_maxbits = 256 | |
65 | } | |
66 | }, | |
67 | { | |
68 | .name = "rfc4106(gcm(aes))", | |
69 | ||
70 | .uinfo = { | |
71 | .aead = { | |
165ecc63 | 72 | .geniv = "seqniv", |
1a6509d9 HX |
73 | .icv_truncbits = 128, |
74 | } | |
75 | }, | |
76 | ||
7e50f84c JK |
77 | .pfkey_supported = 1, |
78 | ||
1a6509d9 HX |
79 | .desc = { |
80 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, | |
81 | .sadb_alg_ivlen = 8, | |
82 | .sadb_alg_minbits = 128, | |
83 | .sadb_alg_maxbits = 256 | |
84 | } | |
85 | }, | |
86 | { | |
87 | .name = "rfc4309(ccm(aes))", | |
88 | ||
89 | .uinfo = { | |
90 | .aead = { | |
165ecc63 | 91 | .geniv = "seqniv", |
1a6509d9 HX |
92 | .icv_truncbits = 64, |
93 | } | |
94 | }, | |
95 | ||
7e50f84c JK |
96 | .pfkey_supported = 1, |
97 | ||
1a6509d9 HX |
98 | .desc = { |
99 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, | |
100 | .sadb_alg_ivlen = 8, | |
101 | .sadb_alg_minbits = 128, | |
102 | .sadb_alg_maxbits = 256 | |
103 | } | |
104 | }, | |
105 | { | |
106 | .name = "rfc4309(ccm(aes))", | |
107 | ||
108 | .uinfo = { | |
109 | .aead = { | |
165ecc63 | 110 | .geniv = "seqniv", |
1a6509d9 HX |
111 | .icv_truncbits = 96, |
112 | } | |
113 | }, | |
114 | ||
7e50f84c JK |
115 | .pfkey_supported = 1, |
116 | ||
1a6509d9 HX |
117 | .desc = { |
118 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, | |
119 | .sadb_alg_ivlen = 8, | |
120 | .sadb_alg_minbits = 128, | |
121 | .sadb_alg_maxbits = 256 | |
122 | } | |
123 | }, | |
124 | { | |
125 | .name = "rfc4309(ccm(aes))", | |
126 | ||
127 | .uinfo = { | |
128 | .aead = { | |
165ecc63 | 129 | .geniv = "seqniv", |
1a6509d9 HX |
130 | .icv_truncbits = 128, |
131 | } | |
132 | }, | |
133 | ||
7e50f84c JK |
134 | .pfkey_supported = 1, |
135 | ||
1a6509d9 HX |
136 | .desc = { |
137 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, | |
138 | .sadb_alg_ivlen = 8, | |
139 | .sadb_alg_minbits = 128, | |
140 | .sadb_alg_maxbits = 256 | |
141 | } | |
142 | }, | |
73c89c15 TB |
143 | { |
144 | .name = "rfc4543(gcm(aes))", | |
145 | ||
146 | .uinfo = { | |
147 | .aead = { | |
165ecc63 | 148 | .geniv = "seqiv", |
73c89c15 TB |
149 | .icv_truncbits = 128, |
150 | } | |
151 | }, | |
152 | ||
7e50f84c JK |
153 | .pfkey_supported = 1, |
154 | ||
73c89c15 TB |
155 | .desc = { |
156 | .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC, | |
157 | .sadb_alg_ivlen = 8, | |
158 | .sadb_alg_minbits = 128, | |
159 | .sadb_alg_maxbits = 256 | |
160 | } | |
161 | }, | |
b08b6b77 MW |
162 | { |
163 | .name = "rfc7539esp(chacha20,poly1305)", | |
164 | ||
165 | .uinfo = { | |
166 | .aead = { | |
167 | .geniv = "seqniv", | |
168 | .icv_truncbits = 128, | |
169 | } | |
170 | }, | |
171 | ||
172 | .pfkey_supported = 0, | |
173 | }, | |
1a6509d9 HX |
174 | }; |
175 | ||
1da177e4 LT |
176 | static struct xfrm_algo_desc aalg_list[] = { |
177 | { | |
01a2202c | 178 | .name = "digest_null", |
a716c119 | 179 | |
1da177e4 LT |
180 | .uinfo = { |
181 | .auth = { | |
182 | .icv_truncbits = 0, | |
183 | .icv_fullbits = 0, | |
184 | } | |
185 | }, | |
a716c119 | 186 | |
7e50f84c JK |
187 | .pfkey_supported = 1, |
188 | ||
1da177e4 LT |
189 | .desc = { |
190 | .sadb_alg_id = SADB_X_AALG_NULL, | |
191 | .sadb_alg_ivlen = 0, | |
192 | .sadb_alg_minbits = 0, | |
193 | .sadb_alg_maxbits = 0 | |
194 | } | |
195 | }, | |
196 | { | |
07d4ee58 HX |
197 | .name = "hmac(md5)", |
198 | .compat = "md5", | |
1da177e4 LT |
199 | |
200 | .uinfo = { | |
201 | .auth = { | |
202 | .icv_truncbits = 96, | |
203 | .icv_fullbits = 128, | |
204 | } | |
205 | }, | |
a716c119 | 206 | |
7e50f84c JK |
207 | .pfkey_supported = 1, |
208 | ||
1da177e4 LT |
209 | .desc = { |
210 | .sadb_alg_id = SADB_AALG_MD5HMAC, | |
211 | .sadb_alg_ivlen = 0, | |
212 | .sadb_alg_minbits = 128, | |
213 | .sadb_alg_maxbits = 128 | |
214 | } | |
215 | }, | |
216 | { | |
07d4ee58 HX |
217 | .name = "hmac(sha1)", |
218 | .compat = "sha1", | |
1da177e4 LT |
219 | |
220 | .uinfo = { | |
221 | .auth = { | |
222 | .icv_truncbits = 96, | |
223 | .icv_fullbits = 160, | |
224 | } | |
225 | }, | |
226 | ||
7e50f84c JK |
227 | .pfkey_supported = 1, |
228 | ||
1da177e4 LT |
229 | .desc = { |
230 | .sadb_alg_id = SADB_AALG_SHA1HMAC, | |
231 | .sadb_alg_ivlen = 0, | |
232 | .sadb_alg_minbits = 160, | |
233 | .sadb_alg_maxbits = 160 | |
234 | } | |
235 | }, | |
236 | { | |
07d4ee58 HX |
237 | .name = "hmac(sha256)", |
238 | .compat = "sha256", | |
1da177e4 LT |
239 | |
240 | .uinfo = { | |
241 | .auth = { | |
242 | .icv_truncbits = 96, | |
243 | .icv_fullbits = 256, | |
244 | } | |
245 | }, | |
246 | ||
7e50f84c JK |
247 | .pfkey_supported = 1, |
248 | ||
1da177e4 LT |
249 | .desc = { |
250 | .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC, | |
251 | .sadb_alg_ivlen = 0, | |
252 | .sadb_alg_minbits = 256, | |
253 | .sadb_alg_maxbits = 256 | |
254 | } | |
255 | }, | |
bc74b0c8 MW |
256 | { |
257 | .name = "hmac(sha384)", | |
258 | ||
259 | .uinfo = { | |
260 | .auth = { | |
261 | .icv_truncbits = 192, | |
262 | .icv_fullbits = 384, | |
263 | } | |
264 | }, | |
265 | ||
7e50f84c JK |
266 | .pfkey_supported = 1, |
267 | ||
bc74b0c8 MW |
268 | .desc = { |
269 | .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC, | |
270 | .sadb_alg_ivlen = 0, | |
271 | .sadb_alg_minbits = 384, | |
272 | .sadb_alg_maxbits = 384 | |
273 | } | |
274 | }, | |
275 | { | |
276 | .name = "hmac(sha512)", | |
277 | ||
278 | .uinfo = { | |
279 | .auth = { | |
280 | .icv_truncbits = 256, | |
281 | .icv_fullbits = 512, | |
282 | } | |
283 | }, | |
284 | ||
7e50f84c JK |
285 | .pfkey_supported = 1, |
286 | ||
bc74b0c8 MW |
287 | .desc = { |
288 | .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC, | |
289 | .sadb_alg_ivlen = 0, | |
290 | .sadb_alg_minbits = 512, | |
291 | .sadb_alg_maxbits = 512 | |
292 | } | |
293 | }, | |
1da177e4 | 294 | { |
a13366c6 AKR |
295 | .name = "hmac(rmd160)", |
296 | .compat = "rmd160", | |
1da177e4 LT |
297 | |
298 | .uinfo = { | |
299 | .auth = { | |
300 | .icv_truncbits = 96, | |
301 | .icv_fullbits = 160, | |
302 | } | |
303 | }, | |
304 | ||
7e50f84c JK |
305 | .pfkey_supported = 1, |
306 | ||
1da177e4 LT |
307 | .desc = { |
308 | .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC, | |
309 | .sadb_alg_ivlen = 0, | |
310 | .sadb_alg_minbits = 160, | |
311 | .sadb_alg_maxbits = 160 | |
312 | } | |
313 | }, | |
7cf4c1a5 KM |
314 | { |
315 | .name = "xcbc(aes)", | |
316 | ||
317 | .uinfo = { | |
318 | .auth = { | |
319 | .icv_truncbits = 96, | |
320 | .icv_fullbits = 128, | |
321 | } | |
322 | }, | |
323 | ||
7e50f84c JK |
324 | .pfkey_supported = 1, |
325 | ||
7cf4c1a5 KM |
326 | .desc = { |
327 | .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC, | |
328 | .sadb_alg_ivlen = 0, | |
329 | .sadb_alg_minbits = 128, | |
330 | .sadb_alg_maxbits = 128 | |
331 | } | |
332 | }, | |
d2049d85 JK |
333 | { |
334 | /* rfc4494 */ | |
335 | .name = "cmac(aes)", | |
336 | ||
337 | .uinfo = { | |
338 | .auth = { | |
339 | .icv_truncbits = 96, | |
340 | .icv_fullbits = 128, | |
341 | } | |
342 | }, | |
343 | ||
344 | .pfkey_supported = 0, | |
345 | }, | |
1da177e4 LT |
346 | }; |
347 | ||
348 | static struct xfrm_algo_desc ealg_list[] = { | |
349 | { | |
6b7326c8 HX |
350 | .name = "ecb(cipher_null)", |
351 | .compat = "cipher_null", | |
a716c119 | 352 | |
1da177e4 LT |
353 | .uinfo = { |
354 | .encr = { | |
355 | .blockbits = 8, | |
356 | .defkeybits = 0, | |
357 | } | |
358 | }, | |
a716c119 | 359 | |
7e50f84c JK |
360 | .pfkey_supported = 1, |
361 | ||
1da177e4 LT |
362 | .desc = { |
363 | .sadb_alg_id = SADB_EALG_NULL, | |
364 | .sadb_alg_ivlen = 0, | |
365 | .sadb_alg_minbits = 0, | |
366 | .sadb_alg_maxbits = 0 | |
367 | } | |
368 | }, | |
369 | { | |
6b7326c8 HX |
370 | .name = "cbc(des)", |
371 | .compat = "des", | |
1da177e4 LT |
372 | |
373 | .uinfo = { | |
374 | .encr = { | |
165ecc63 | 375 | .geniv = "echainiv", |
1da177e4 LT |
376 | .blockbits = 64, |
377 | .defkeybits = 64, | |
378 | } | |
379 | }, | |
380 | ||
7e50f84c JK |
381 | .pfkey_supported = 1, |
382 | ||
1da177e4 LT |
383 | .desc = { |
384 | .sadb_alg_id = SADB_EALG_DESCBC, | |
385 | .sadb_alg_ivlen = 8, | |
386 | .sadb_alg_minbits = 64, | |
387 | .sadb_alg_maxbits = 64 | |
388 | } | |
389 | }, | |
390 | { | |
6b7326c8 HX |
391 | .name = "cbc(des3_ede)", |
392 | .compat = "des3_ede", | |
1da177e4 LT |
393 | |
394 | .uinfo = { | |
395 | .encr = { | |
165ecc63 | 396 | .geniv = "echainiv", |
1da177e4 LT |
397 | .blockbits = 64, |
398 | .defkeybits = 192, | |
399 | } | |
400 | }, | |
401 | ||
7e50f84c JK |
402 | .pfkey_supported = 1, |
403 | ||
1da177e4 LT |
404 | .desc = { |
405 | .sadb_alg_id = SADB_EALG_3DESCBC, | |
406 | .sadb_alg_ivlen = 8, | |
407 | .sadb_alg_minbits = 192, | |
408 | .sadb_alg_maxbits = 192 | |
409 | } | |
410 | }, | |
411 | { | |
245acb87 HX |
412 | .name = "cbc(cast5)", |
413 | .compat = "cast5", | |
1da177e4 LT |
414 | |
415 | .uinfo = { | |
416 | .encr = { | |
165ecc63 | 417 | .geniv = "echainiv", |
1da177e4 LT |
418 | .blockbits = 64, |
419 | .defkeybits = 128, | |
420 | } | |
421 | }, | |
422 | ||
7e50f84c JK |
423 | .pfkey_supported = 1, |
424 | ||
1da177e4 LT |
425 | .desc = { |
426 | .sadb_alg_id = SADB_X_EALG_CASTCBC, | |
427 | .sadb_alg_ivlen = 8, | |
428 | .sadb_alg_minbits = 40, | |
429 | .sadb_alg_maxbits = 128 | |
430 | } | |
431 | }, | |
432 | { | |
6b7326c8 HX |
433 | .name = "cbc(blowfish)", |
434 | .compat = "blowfish", | |
1da177e4 LT |
435 | |
436 | .uinfo = { | |
437 | .encr = { | |
165ecc63 | 438 | .geniv = "echainiv", |
1da177e4 LT |
439 | .blockbits = 64, |
440 | .defkeybits = 128, | |
441 | } | |
442 | }, | |
443 | ||
7e50f84c JK |
444 | .pfkey_supported = 1, |
445 | ||
1da177e4 LT |
446 | .desc = { |
447 | .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC, | |
448 | .sadb_alg_ivlen = 8, | |
449 | .sadb_alg_minbits = 40, | |
450 | .sadb_alg_maxbits = 448 | |
451 | } | |
452 | }, | |
453 | { | |
6b7326c8 HX |
454 | .name = "cbc(aes)", |
455 | .compat = "aes", | |
1da177e4 LT |
456 | |
457 | .uinfo = { | |
458 | .encr = { | |
165ecc63 | 459 | .geniv = "echainiv", |
1da177e4 LT |
460 | .blockbits = 128, |
461 | .defkeybits = 128, | |
462 | } | |
463 | }, | |
464 | ||
7e50f84c JK |
465 | .pfkey_supported = 1, |
466 | ||
1da177e4 LT |
467 | .desc = { |
468 | .sadb_alg_id = SADB_X_EALG_AESCBC, | |
469 | .sadb_alg_ivlen = 8, | |
470 | .sadb_alg_minbits = 128, | |
471 | .sadb_alg_maxbits = 256 | |
472 | } | |
473 | }, | |
474 | { | |
a716c119 YH |
475 | .name = "cbc(serpent)", |
476 | .compat = "serpent", | |
477 | ||
478 | .uinfo = { | |
479 | .encr = { | |
165ecc63 | 480 | .geniv = "echainiv", |
a716c119 YH |
481 | .blockbits = 128, |
482 | .defkeybits = 128, | |
483 | } | |
484 | }, | |
485 | ||
7e50f84c JK |
486 | .pfkey_supported = 1, |
487 | ||
a716c119 YH |
488 | .desc = { |
489 | .sadb_alg_id = SADB_X_EALG_SERPENTCBC, | |
490 | .sadb_alg_ivlen = 8, | |
491 | .sadb_alg_minbits = 128, | |
492 | .sadb_alg_maxbits = 256, | |
493 | } | |
1da177e4 | 494 | }, |
6a0dc8d7 NT |
495 | { |
496 | .name = "cbc(camellia)", | |
138f3c85 | 497 | .compat = "camellia", |
6a0dc8d7 NT |
498 | |
499 | .uinfo = { | |
500 | .encr = { | |
165ecc63 | 501 | .geniv = "echainiv", |
6a0dc8d7 NT |
502 | .blockbits = 128, |
503 | .defkeybits = 128, | |
504 | } | |
505 | }, | |
506 | ||
7e50f84c JK |
507 | .pfkey_supported = 1, |
508 | ||
6a0dc8d7 NT |
509 | .desc = { |
510 | .sadb_alg_id = SADB_X_EALG_CAMELLIACBC, | |
511 | .sadb_alg_ivlen = 8, | |
512 | .sadb_alg_minbits = 128, | |
513 | .sadb_alg_maxbits = 256 | |
514 | } | |
515 | }, | |
1da177e4 | 516 | { |
a716c119 YH |
517 | .name = "cbc(twofish)", |
518 | .compat = "twofish", | |
519 | ||
520 | .uinfo = { | |
521 | .encr = { | |
165ecc63 | 522 | .geniv = "echainiv", |
a716c119 YH |
523 | .blockbits = 128, |
524 | .defkeybits = 128, | |
525 | } | |
526 | }, | |
527 | ||
7e50f84c JK |
528 | .pfkey_supported = 1, |
529 | ||
a716c119 YH |
530 | .desc = { |
531 | .sadb_alg_id = SADB_X_EALG_TWOFISHCBC, | |
532 | .sadb_alg_ivlen = 8, | |
533 | .sadb_alg_minbits = 128, | |
534 | .sadb_alg_maxbits = 256 | |
535 | } | |
1da177e4 | 536 | }, |
405137d1 JL |
537 | { |
538 | .name = "rfc3686(ctr(aes))", | |
539 | ||
540 | .uinfo = { | |
541 | .encr = { | |
165ecc63 | 542 | .geniv = "seqiv", |
405137d1 JL |
543 | .blockbits = 128, |
544 | .defkeybits = 160, /* 128-bit key + 32-bit nonce */ | |
545 | } | |
546 | }, | |
547 | ||
7e50f84c JK |
548 | .pfkey_supported = 1, |
549 | ||
405137d1 JL |
550 | .desc = { |
551 | .sadb_alg_id = SADB_X_EALG_AESCTR, | |
552 | .sadb_alg_ivlen = 8, | |
4203223a TG |
553 | .sadb_alg_minbits = 160, |
554 | .sadb_alg_maxbits = 288 | |
405137d1 JL |
555 | } |
556 | }, | |
1da177e4 LT |
557 | }; |
558 | ||
559 | static struct xfrm_algo_desc calg_list[] = { | |
560 | { | |
561 | .name = "deflate", | |
562 | .uinfo = { | |
563 | .comp = { | |
564 | .threshold = 90, | |
565 | } | |
566 | }, | |
7e50f84c | 567 | .pfkey_supported = 1, |
1da177e4 LT |
568 | .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE } |
569 | }, | |
570 | { | |
571 | .name = "lzs", | |
572 | .uinfo = { | |
573 | .comp = { | |
574 | .threshold = 90, | |
575 | } | |
576 | }, | |
7e50f84c | 577 | .pfkey_supported = 1, |
1da177e4 LT |
578 | .desc = { .sadb_alg_id = SADB_X_CALG_LZS } |
579 | }, | |
580 | { | |
581 | .name = "lzjh", | |
582 | .uinfo = { | |
583 | .comp = { | |
584 | .threshold = 50, | |
585 | } | |
586 | }, | |
7e50f84c | 587 | .pfkey_supported = 1, |
1da177e4 LT |
588 | .desc = { .sadb_alg_id = SADB_X_CALG_LZJH } |
589 | }, | |
590 | }; | |
591 | ||
592 | static inline int aalg_entries(void) | |
593 | { | |
594 | return ARRAY_SIZE(aalg_list); | |
595 | } | |
596 | ||
597 | static inline int ealg_entries(void) | |
598 | { | |
599 | return ARRAY_SIZE(ealg_list); | |
600 | } | |
601 | ||
602 | static inline int calg_entries(void) | |
603 | { | |
604 | return ARRAY_SIZE(calg_list); | |
605 | } | |
606 | ||
c92b3a2f HX |
607 | struct xfrm_algo_list { |
608 | struct xfrm_algo_desc *algs; | |
609 | int entries; | |
610 | u32 type; | |
611 | u32 mask; | |
612 | }; | |
1da177e4 | 613 | |
1a6509d9 HX |
614 | static const struct xfrm_algo_list xfrm_aead_list = { |
615 | .algs = aead_list, | |
616 | .entries = ARRAY_SIZE(aead_list), | |
617 | .type = CRYPTO_ALG_TYPE_AEAD, | |
618 | .mask = CRYPTO_ALG_TYPE_MASK, | |
619 | }; | |
620 | ||
c92b3a2f HX |
621 | static const struct xfrm_algo_list xfrm_aalg_list = { |
622 | .algs = aalg_list, | |
623 | .entries = ARRAY_SIZE(aalg_list), | |
624 | .type = CRYPTO_ALG_TYPE_HASH, | |
6fbf2cb7 | 625 | .mask = CRYPTO_ALG_TYPE_HASH_MASK, |
c92b3a2f | 626 | }; |
1da177e4 | 627 | |
c92b3a2f HX |
628 | static const struct xfrm_algo_list xfrm_ealg_list = { |
629 | .algs = ealg_list, | |
630 | .entries = ARRAY_SIZE(ealg_list), | |
631 | .type = CRYPTO_ALG_TYPE_BLKCIPHER, | |
6fbf2cb7 | 632 | .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK, |
c92b3a2f | 633 | }; |
1da177e4 | 634 | |
c92b3a2f HX |
635 | static const struct xfrm_algo_list xfrm_calg_list = { |
636 | .algs = calg_list, | |
637 | .entries = ARRAY_SIZE(calg_list), | |
638 | .type = CRYPTO_ALG_TYPE_COMPRESS, | |
6fbf2cb7 | 639 | .mask = CRYPTO_ALG_TYPE_MASK, |
c92b3a2f | 640 | }; |
1da177e4 | 641 | |
c92b3a2f HX |
642 | static struct xfrm_algo_desc *xfrm_find_algo( |
643 | const struct xfrm_algo_list *algo_list, | |
644 | int match(const struct xfrm_algo_desc *entry, const void *data), | |
645 | const void *data, int probe) | |
1da177e4 | 646 | { |
c92b3a2f | 647 | struct xfrm_algo_desc *list = algo_list->algs; |
1da177e4 LT |
648 | int i, status; |
649 | ||
c92b3a2f HX |
650 | for (i = 0; i < algo_list->entries; i++) { |
651 | if (!match(list + i, data)) | |
1da177e4 LT |
652 | continue; |
653 | ||
654 | if (list[i].available) | |
655 | return &list[i]; | |
656 | ||
657 | if (!probe) | |
658 | break; | |
659 | ||
c92b3a2f HX |
660 | status = crypto_has_alg(list[i].name, algo_list->type, |
661 | algo_list->mask); | |
1da177e4 LT |
662 | if (!status) |
663 | break; | |
664 | ||
665 | list[i].available = status; | |
666 | return &list[i]; | |
667 | } | |
668 | return NULL; | |
669 | } | |
670 | ||
c92b3a2f HX |
671 | static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry, |
672 | const void *data) | |
673 | { | |
26b8e51e | 674 | return entry->desc.sadb_alg_id == (unsigned long)data; |
c92b3a2f HX |
675 | } |
676 | ||
677 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id) | |
678 | { | |
679 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match, | |
26b8e51e | 680 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
681 | } |
682 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid); | |
683 | ||
684 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id) | |
685 | { | |
686 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match, | |
26b8e51e | 687 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
688 | } |
689 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid); | |
690 | ||
691 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id) | |
692 | { | |
693 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match, | |
26b8e51e | 694 | (void *)(unsigned long)alg_id, 1); |
c92b3a2f HX |
695 | } |
696 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byid); | |
697 | ||
698 | static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry, | |
699 | const void *data) | |
700 | { | |
701 | const char *name = data; | |
702 | ||
703 | return name && (!strcmp(name, entry->name) || | |
704 | (entry->compat && !strcmp(name, entry->compat))); | |
705 | } | |
706 | ||
6f2f19ed | 707 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe) |
1da177e4 | 708 | { |
c92b3a2f HX |
709 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name, |
710 | probe); | |
1da177e4 LT |
711 | } |
712 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname); | |
713 | ||
6f2f19ed | 714 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe) |
1da177e4 | 715 | { |
c92b3a2f HX |
716 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name, |
717 | probe); | |
1da177e4 LT |
718 | } |
719 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname); | |
720 | ||
6f2f19ed | 721 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe) |
1da177e4 | 722 | { |
c92b3a2f HX |
723 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name, |
724 | probe); | |
1da177e4 LT |
725 | } |
726 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byname); | |
727 | ||
1a6509d9 HX |
728 | struct xfrm_aead_name { |
729 | const char *name; | |
730 | int icvbits; | |
731 | }; | |
732 | ||
733 | static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry, | |
734 | const void *data) | |
735 | { | |
736 | const struct xfrm_aead_name *aead = data; | |
737 | const char *name = aead->name; | |
738 | ||
739 | return aead->icvbits == entry->uinfo.aead.icv_truncbits && name && | |
740 | !strcmp(name, entry->name); | |
741 | } | |
742 | ||
6f2f19ed | 743 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe) |
1a6509d9 HX |
744 | { |
745 | struct xfrm_aead_name data = { | |
746 | .name = name, | |
747 | .icvbits = icv_len, | |
748 | }; | |
749 | ||
750 | return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data, | |
751 | probe); | |
752 | } | |
753 | EXPORT_SYMBOL_GPL(xfrm_aead_get_byname); | |
754 | ||
1da177e4 LT |
755 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx) |
756 | { | |
757 | if (idx >= aalg_entries()) | |
758 | return NULL; | |
759 | ||
760 | return &aalg_list[idx]; | |
761 | } | |
762 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx); | |
763 | ||
764 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx) | |
765 | { | |
766 | if (idx >= ealg_entries()) | |
767 | return NULL; | |
768 | ||
769 | return &ealg_list[idx]; | |
770 | } | |
771 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx); | |
772 | ||
773 | /* | |
774 | * Probe for the availability of crypto algorithms, and set the available | |
775 | * flag for any algorithms found on the system. This is typically called by | |
776 | * pfkey during userspace SA add, update or register. | |
777 | */ | |
778 | void xfrm_probe_algs(void) | |
779 | { | |
1da177e4 | 780 | int i, status; |
a716c119 | 781 | |
1da177e4 LT |
782 | BUG_ON(in_softirq()); |
783 | ||
784 | for (i = 0; i < aalg_entries(); i++) { | |
e4d5b79c HX |
785 | status = crypto_has_hash(aalg_list[i].name, 0, |
786 | CRYPTO_ALG_ASYNC); | |
1da177e4 LT |
787 | if (aalg_list[i].available != status) |
788 | aalg_list[i].available = status; | |
789 | } | |
a716c119 | 790 | |
1da177e4 | 791 | for (i = 0; i < ealg_entries(); i++) { |
71331da5 | 792 | status = crypto_has_ablkcipher(ealg_list[i].name, 0, 0); |
1da177e4 LT |
793 | if (ealg_list[i].available != status) |
794 | ealg_list[i].available = status; | |
795 | } | |
a716c119 | 796 | |
1da177e4 | 797 | for (i = 0; i < calg_entries(); i++) { |
e4d5b79c HX |
798 | status = crypto_has_comp(calg_list[i].name, 0, |
799 | CRYPTO_ALG_ASYNC); | |
1da177e4 LT |
800 | if (calg_list[i].available != status) |
801 | calg_list[i].available = status; | |
802 | } | |
1da177e4 LT |
803 | } |
804 | EXPORT_SYMBOL_GPL(xfrm_probe_algs); | |
805 | ||
7e50f84c | 806 | int xfrm_count_pfkey_auth_supported(void) |
1da177e4 LT |
807 | { |
808 | int i, n; | |
809 | ||
810 | for (i = 0, n = 0; i < aalg_entries(); i++) | |
7e50f84c | 811 | if (aalg_list[i].available && aalg_list[i].pfkey_supported) |
1da177e4 LT |
812 | n++; |
813 | return n; | |
814 | } | |
7e50f84c | 815 | EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported); |
1da177e4 | 816 | |
7e50f84c | 817 | int xfrm_count_pfkey_enc_supported(void) |
1da177e4 LT |
818 | { |
819 | int i, n; | |
820 | ||
821 | for (i = 0, n = 0; i < ealg_entries(); i++) | |
7e50f84c | 822 | if (ealg_list[i].available && ealg_list[i].pfkey_supported) |
1da177e4 LT |
823 | n++; |
824 | return n; | |
825 | } | |
7e50f84c | 826 | EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported); |
1da177e4 | 827 | |
7e152524 | 828 | MODULE_LICENSE("GPL"); |