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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * xfrm algorithm interface
4 *
5 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
6 */
7
8#include <crypto/hash.h>
9#include <crypto/skcipher.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/pfkeyv2.h>
13#include <linux/crypto.h>
14#include <linux/scatterlist.h>
15#include <net/xfrm.h>
16#if IS_ENABLED(CONFIG_INET_ESP) || IS_ENABLED(CONFIG_INET6_ESP)
17#include <net/esp.h>
18#endif
19
20/*
21 * Algorithms supported by IPsec. These entries contain properties which
22 * are used in key negotiation and xfrm processing, and are used to verify
23 * that instantiated crypto transforms have correct parameters for IPsec
24 * purposes.
25 */
26static struct xfrm_algo_desc aead_list[] = {
27{
28 .name = "rfc4106(gcm(aes))",
29
30 .uinfo = {
31 .aead = {
32 .geniv = "seqiv",
33 .icv_truncbits = 64,
34 }
35 },
36
37 .pfkey_supported = 1,
38
39 .desc = {
40 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
41 .sadb_alg_ivlen = 8,
42 .sadb_alg_minbits = 128,
43 .sadb_alg_maxbits = 256
44 }
45},
46{
47 .name = "rfc4106(gcm(aes))",
48
49 .uinfo = {
50 .aead = {
51 .geniv = "seqiv",
52 .icv_truncbits = 96,
53 }
54 },
55
56 .pfkey_supported = 1,
57
58 .desc = {
59 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
60 .sadb_alg_ivlen = 8,
61 .sadb_alg_minbits = 128,
62 .sadb_alg_maxbits = 256
63 }
64},
65{
66 .name = "rfc4106(gcm(aes))",
67
68 .uinfo = {
69 .aead = {
70 .geniv = "seqiv",
71 .icv_truncbits = 128,
72 }
73 },
74
75 .pfkey_supported = 1,
76
77 .desc = {
78 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
79 .sadb_alg_ivlen = 8,
80 .sadb_alg_minbits = 128,
81 .sadb_alg_maxbits = 256
82 }
83},
84{
85 .name = "rfc4309(ccm(aes))",
86
87 .uinfo = {
88 .aead = {
89 .geniv = "seqiv",
90 .icv_truncbits = 64,
91 }
92 },
93
94 .pfkey_supported = 1,
95
96 .desc = {
97 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
98 .sadb_alg_ivlen = 8,
99 .sadb_alg_minbits = 128,
100 .sadb_alg_maxbits = 256
101 }
102},
103{
104 .name = "rfc4309(ccm(aes))",
105
106 .uinfo = {
107 .aead = {
108 .geniv = "seqiv",
109 .icv_truncbits = 96,
110 }
111 },
112
113 .pfkey_supported = 1,
114
115 .desc = {
116 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
117 .sadb_alg_ivlen = 8,
118 .sadb_alg_minbits = 128,
119 .sadb_alg_maxbits = 256
120 }
121},
122{
123 .name = "rfc4309(ccm(aes))",
124
125 .uinfo = {
126 .aead = {
127 .geniv = "seqiv",
128 .icv_truncbits = 128,
129 }
130 },
131
132 .pfkey_supported = 1,
133
134 .desc = {
135 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
136 .sadb_alg_ivlen = 8,
137 .sadb_alg_minbits = 128,
138 .sadb_alg_maxbits = 256
139 }
140},
141{
142 .name = "rfc4543(gcm(aes))",
143
144 .uinfo = {
145 .aead = {
146 .geniv = "seqiv",
147 .icv_truncbits = 128,
148 }
149 },
150
151 .pfkey_supported = 1,
152
153 .desc = {
154 .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
155 .sadb_alg_ivlen = 8,
156 .sadb_alg_minbits = 128,
157 .sadb_alg_maxbits = 256
158 }
159},
160{
161 .name = "rfc7539esp(chacha20,poly1305)",
162
163 .uinfo = {
164 .aead = {
165 .geniv = "seqiv",
166 .icv_truncbits = 128,
167 }
168 },
169
170 .pfkey_supported = 0,
171},
172};
173
174static struct xfrm_algo_desc aalg_list[] = {
175{
176 .name = "digest_null",
177
178 .uinfo = {
179 .auth = {
180 .icv_truncbits = 0,
181 .icv_fullbits = 0,
182 }
183 },
184
185 .pfkey_supported = 1,
186
187 .desc = {
188 .sadb_alg_id = SADB_X_AALG_NULL,
189 .sadb_alg_ivlen = 0,
190 .sadb_alg_minbits = 0,
191 .sadb_alg_maxbits = 0
192 }
193},
194{
195 .name = "hmac(md5)",
196 .compat = "md5",
197
198 .uinfo = {
199 .auth = {
200 .icv_truncbits = 96,
201 .icv_fullbits = 128,
202 }
203 },
204
205 .pfkey_supported = 1,
206
207 .desc = {
208 .sadb_alg_id = SADB_AALG_MD5HMAC,
209 .sadb_alg_ivlen = 0,
210 .sadb_alg_minbits = 128,
211 .sadb_alg_maxbits = 128
212 }
213},
214{
215 .name = "hmac(sha1)",
216 .compat = "sha1",
217
218 .uinfo = {
219 .auth = {
220 .icv_truncbits = 96,
221 .icv_fullbits = 160,
222 }
223 },
224
225 .pfkey_supported = 1,
226
227 .desc = {
228 .sadb_alg_id = SADB_AALG_SHA1HMAC,
229 .sadb_alg_ivlen = 0,
230 .sadb_alg_minbits = 160,
231 .sadb_alg_maxbits = 160
232 }
233},
234{
235 .name = "hmac(sha256)",
236 .compat = "sha256",
237
238 .uinfo = {
239 .auth = {
240 .icv_truncbits = 96,
241 .icv_fullbits = 256,
242 }
243 },
244
245 .pfkey_supported = 1,
246
247 .desc = {
248 .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
249 .sadb_alg_ivlen = 0,
250 .sadb_alg_minbits = 256,
251 .sadb_alg_maxbits = 256
252 }
253},
254{
255 .name = "hmac(sha384)",
256
257 .uinfo = {
258 .auth = {
259 .icv_truncbits = 192,
260 .icv_fullbits = 384,
261 }
262 },
263
264 .pfkey_supported = 1,
265
266 .desc = {
267 .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
268 .sadb_alg_ivlen = 0,
269 .sadb_alg_minbits = 384,
270 .sadb_alg_maxbits = 384
271 }
272},
273{
274 .name = "hmac(sha512)",
275
276 .uinfo = {
277 .auth = {
278 .icv_truncbits = 256,
279 .icv_fullbits = 512,
280 }
281 },
282
283 .pfkey_supported = 1,
284
285 .desc = {
286 .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
287 .sadb_alg_ivlen = 0,
288 .sadb_alg_minbits = 512,
289 .sadb_alg_maxbits = 512
290 }
291},
292{
293 .name = "hmac(rmd160)",
294 .compat = "rmd160",
295
296 .uinfo = {
297 .auth = {
298 .icv_truncbits = 96,
299 .icv_fullbits = 160,
300 }
301 },
302
303 .pfkey_supported = 1,
304
305 .desc = {
306 .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
307 .sadb_alg_ivlen = 0,
308 .sadb_alg_minbits = 160,
309 .sadb_alg_maxbits = 160
310 }
311},
312{
313 .name = "xcbc(aes)",
314
315 .uinfo = {
316 .auth = {
317 .icv_truncbits = 96,
318 .icv_fullbits = 128,
319 }
320 },
321
322 .pfkey_supported = 1,
323
324 .desc = {
325 .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
326 .sadb_alg_ivlen = 0,
327 .sadb_alg_minbits = 128,
328 .sadb_alg_maxbits = 128
329 }
330},
331{
332 /* rfc4494 */
333 .name = "cmac(aes)",
334
335 .uinfo = {
336 .auth = {
337 .icv_truncbits = 96,
338 .icv_fullbits = 128,
339 }
340 },
341
342 .pfkey_supported = 0,
343},
344};
345
346static struct xfrm_algo_desc ealg_list[] = {
347{
348 .name = "ecb(cipher_null)",
349 .compat = "cipher_null",
350
351 .uinfo = {
352 .encr = {
353 .blockbits = 8,
354 .defkeybits = 0,
355 }
356 },
357
358 .pfkey_supported = 1,
359
360 .desc = {
361 .sadb_alg_id = SADB_EALG_NULL,
362 .sadb_alg_ivlen = 0,
363 .sadb_alg_minbits = 0,
364 .sadb_alg_maxbits = 0
365 }
366},
367{
368 .name = "cbc(des)",
369 .compat = "des",
370
371 .uinfo = {
372 .encr = {
373 .geniv = "echainiv",
374 .blockbits = 64,
375 .defkeybits = 64,
376 }
377 },
378
379 .pfkey_supported = 1,
380
381 .desc = {
382 .sadb_alg_id = SADB_EALG_DESCBC,
383 .sadb_alg_ivlen = 8,
384 .sadb_alg_minbits = 64,
385 .sadb_alg_maxbits = 64
386 }
387},
388{
389 .name = "cbc(des3_ede)",
390 .compat = "des3_ede",
391
392 .uinfo = {
393 .encr = {
394 .geniv = "echainiv",
395 .blockbits = 64,
396 .defkeybits = 192,
397 }
398 },
399
400 .pfkey_supported = 1,
401
402 .desc = {
403 .sadb_alg_id = SADB_EALG_3DESCBC,
404 .sadb_alg_ivlen = 8,
405 .sadb_alg_minbits = 192,
406 .sadb_alg_maxbits = 192
407 }
408},
409{
410 .name = "cbc(cast5)",
411 .compat = "cast5",
412
413 .uinfo = {
414 .encr = {
415 .geniv = "echainiv",
416 .blockbits = 64,
417 .defkeybits = 128,
418 }
419 },
420
421 .pfkey_supported = 1,
422
423 .desc = {
424 .sadb_alg_id = SADB_X_EALG_CASTCBC,
425 .sadb_alg_ivlen = 8,
426 .sadb_alg_minbits = 40,
427 .sadb_alg_maxbits = 128
428 }
429},
430{
431 .name = "cbc(blowfish)",
432 .compat = "blowfish",
433
434 .uinfo = {
435 .encr = {
436 .geniv = "echainiv",
437 .blockbits = 64,
438 .defkeybits = 128,
439 }
440 },
441
442 .pfkey_supported = 1,
443
444 .desc = {
445 .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
446 .sadb_alg_ivlen = 8,
447 .sadb_alg_minbits = 40,
448 .sadb_alg_maxbits = 448
449 }
450},
451{
452 .name = "cbc(aes)",
453 .compat = "aes",
454
455 .uinfo = {
456 .encr = {
457 .geniv = "echainiv",
458 .blockbits = 128,
459 .defkeybits = 128,
460 }
461 },
462
463 .pfkey_supported = 1,
464
465 .desc = {
466 .sadb_alg_id = SADB_X_EALG_AESCBC,
467 .sadb_alg_ivlen = 8,
468 .sadb_alg_minbits = 128,
469 .sadb_alg_maxbits = 256
470 }
471},
472{
473 .name = "cbc(serpent)",
474 .compat = "serpent",
475
476 .uinfo = {
477 .encr = {
478 .geniv = "echainiv",
479 .blockbits = 128,
480 .defkeybits = 128,
481 }
482 },
483
484 .pfkey_supported = 1,
485
486 .desc = {
487 .sadb_alg_id = SADB_X_EALG_SERPENTCBC,
488 .sadb_alg_ivlen = 8,
489 .sadb_alg_minbits = 128,
490 .sadb_alg_maxbits = 256,
491 }
492},
493{
494 .name = "cbc(camellia)",
495 .compat = "camellia",
496
497 .uinfo = {
498 .encr = {
499 .geniv = "echainiv",
500 .blockbits = 128,
501 .defkeybits = 128,
502 }
503 },
504
505 .pfkey_supported = 1,
506
507 .desc = {
508 .sadb_alg_id = SADB_X_EALG_CAMELLIACBC,
509 .sadb_alg_ivlen = 8,
510 .sadb_alg_minbits = 128,
511 .sadb_alg_maxbits = 256
512 }
513},
514{
515 .name = "cbc(twofish)",
516 .compat = "twofish",
517
518 .uinfo = {
519 .encr = {
520 .geniv = "echainiv",
521 .blockbits = 128,
522 .defkeybits = 128,
523 }
524 },
525
526 .pfkey_supported = 1,
527
528 .desc = {
529 .sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
530 .sadb_alg_ivlen = 8,
531 .sadb_alg_minbits = 128,
532 .sadb_alg_maxbits = 256
533 }
534},
535{
536 .name = "rfc3686(ctr(aes))",
537
538 .uinfo = {
539 .encr = {
540 .geniv = "seqiv",
541 .blockbits = 128,
542 .defkeybits = 160, /* 128-bit key + 32-bit nonce */
543 }
544 },
545
546 .pfkey_supported = 1,
547
548 .desc = {
549 .sadb_alg_id = SADB_X_EALG_AESCTR,
550 .sadb_alg_ivlen = 8,
551 .sadb_alg_minbits = 160,
552 .sadb_alg_maxbits = 288
553 }
554},
555};
556
557static struct xfrm_algo_desc calg_list[] = {
558{
559 .name = "deflate",
560 .uinfo = {
561 .comp = {
562 .threshold = 90,
563 }
564 },
565 .pfkey_supported = 1,
566 .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
567},
568{
569 .name = "lzs",
570 .uinfo = {
571 .comp = {
572 .threshold = 90,
573 }
574 },
575 .pfkey_supported = 1,
576 .desc = { .sadb_alg_id = SADB_X_CALG_LZS }
577},
578{
579 .name = "lzjh",
580 .uinfo = {
581 .comp = {
582 .threshold = 50,
583 }
584 },
585 .pfkey_supported = 1,
586 .desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
587},
588};
589
590static inline int aalg_entries(void)
591{
592 return ARRAY_SIZE(aalg_list);
593}
594
595static inline int ealg_entries(void)
596{
597 return ARRAY_SIZE(ealg_list);
598}
599
600static inline int calg_entries(void)
601{
602 return ARRAY_SIZE(calg_list);
603}
604
605struct xfrm_algo_list {
606 struct xfrm_algo_desc *algs;
607 int entries;
608 u32 type;
609 u32 mask;
610};
611
612static const struct xfrm_algo_list xfrm_aead_list = {
613 .algs = aead_list,
614 .entries = ARRAY_SIZE(aead_list),
615 .type = CRYPTO_ALG_TYPE_AEAD,
616 .mask = CRYPTO_ALG_TYPE_MASK,
617};
618
619static const struct xfrm_algo_list xfrm_aalg_list = {
620 .algs = aalg_list,
621 .entries = ARRAY_SIZE(aalg_list),
622 .type = CRYPTO_ALG_TYPE_HASH,
623 .mask = CRYPTO_ALG_TYPE_HASH_MASK,
624};
625
626static const struct xfrm_algo_list xfrm_ealg_list = {
627 .algs = ealg_list,
628 .entries = ARRAY_SIZE(ealg_list),
629 .type = CRYPTO_ALG_TYPE_BLKCIPHER,
630 .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
631};
632
633static const struct xfrm_algo_list xfrm_calg_list = {
634 .algs = calg_list,
635 .entries = ARRAY_SIZE(calg_list),
636 .type = CRYPTO_ALG_TYPE_COMPRESS,
637 .mask = CRYPTO_ALG_TYPE_MASK,
638};
639
640static struct xfrm_algo_desc *xfrm_find_algo(
641 const struct xfrm_algo_list *algo_list,
642 int match(const struct xfrm_algo_desc *entry, const void *data),
643 const void *data, int probe)
644{
645 struct xfrm_algo_desc *list = algo_list->algs;
646 int i, status;
647
648 for (i = 0; i < algo_list->entries; i++) {
649 if (!match(list + i, data))
650 continue;
651
652 if (list[i].available)
653 return &list[i];
654
655 if (!probe)
656 break;
657
658 status = crypto_has_alg(list[i].name, algo_list->type,
659 algo_list->mask);
660 if (!status)
661 break;
662
663 list[i].available = status;
664 return &list[i];
665 }
666 return NULL;
667}
668
669static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
670 const void *data)
671{
672 return entry->desc.sadb_alg_id == (unsigned long)data;
673}
674
675struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
676{
677 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
678 (void *)(unsigned long)alg_id, 1);
679}
680EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
681
682struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
683{
684 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
685 (void *)(unsigned long)alg_id, 1);
686}
687EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
688
689struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
690{
691 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
692 (void *)(unsigned long)alg_id, 1);
693}
694EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
695
696static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
697 const void *data)
698{
699 const char *name = data;
700
701 return name && (!strcmp(name, entry->name) ||
702 (entry->compat && !strcmp(name, entry->compat)));
703}
704
705struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
706{
707 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
708 probe);
709}
710EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
711
712struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
713{
714 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
715 probe);
716}
717EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
718
719struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
720{
721 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
722 probe);
723}
724EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
725
726struct xfrm_aead_name {
727 const char *name;
728 int icvbits;
729};
730
731static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
732 const void *data)
733{
734 const struct xfrm_aead_name *aead = data;
735 const char *name = aead->name;
736
737 return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
738 !strcmp(name, entry->name);
739}
740
741struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe)
742{
743 struct xfrm_aead_name data = {
744 .name = name,
745 .icvbits = icv_len,
746 };
747
748 return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
749 probe);
750}
751EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
752
753struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
754{
755 if (idx >= aalg_entries())
756 return NULL;
757
758 return &aalg_list[idx];
759}
760EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
761
762struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
763{
764 if (idx >= ealg_entries())
765 return NULL;
766
767 return &ealg_list[idx];
768}
769EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);
770
771/*
772 * Probe for the availability of crypto algorithms, and set the available
773 * flag for any algorithms found on the system. This is typically called by
774 * pfkey during userspace SA add, update or register.
775 */
776void xfrm_probe_algs(void)
777{
778 int i, status;
779
780 BUG_ON(in_softirq());
781
782 for (i = 0; i < aalg_entries(); i++) {
783 status = crypto_has_ahash(aalg_list[i].name, 0, 0);
784 if (aalg_list[i].available != status)
785 aalg_list[i].available = status;
786 }
787
788 for (i = 0; i < ealg_entries(); i++) {
789 status = crypto_has_skcipher(ealg_list[i].name, 0, 0);
790 if (ealg_list[i].available != status)
791 ealg_list[i].available = status;
792 }
793
794 for (i = 0; i < calg_entries(); i++) {
795 status = crypto_has_comp(calg_list[i].name, 0,
796 CRYPTO_ALG_ASYNC);
797 if (calg_list[i].available != status)
798 calg_list[i].available = status;
799 }
800}
801EXPORT_SYMBOL_GPL(xfrm_probe_algs);
802
803int xfrm_count_pfkey_auth_supported(void)
804{
805 int i, n;
806
807 for (i = 0, n = 0; i < aalg_entries(); i++)
808 if (aalg_list[i].available && aalg_list[i].pfkey_supported)
809 n++;
810 return n;
811}
812EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);
813
814int xfrm_count_pfkey_enc_supported(void)
815{
816 int i, n;
817
818 for (i = 0, n = 0; i < ealg_entries(); i++)
819 if (ealg_list[i].available && ealg_list[i].pfkey_supported)
820 n++;
821 return n;
822}
823EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);
824
825MODULE_LICENSE("GPL");
1/*
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
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/pfkeyv2.h>
15#include <linux/crypto.h>
16#include <linux/scatterlist.h>
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
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 */
31static 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 .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},
144};
145
146static struct xfrm_algo_desc aalg_list[] = {
147{
148 .name = "digest_null",
149
150 .uinfo = {
151 .auth = {
152 .icv_truncbits = 0,
153 .icv_fullbits = 0,
154 }
155 },
156
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{
165 .name = "hmac(md5)",
166 .compat = "md5",
167
168 .uinfo = {
169 .auth = {
170 .icv_truncbits = 96,
171 .icv_fullbits = 128,
172 }
173 },
174
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{
183 .name = "hmac(sha1)",
184 .compat = "sha1",
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{
201 .name = "hmac(sha256)",
202 .compat = "sha256",
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},
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},
252{
253 .name = "hmac(rmd160)",
254 .compat = "rmd160",
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},
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},
287};
288
289static struct xfrm_algo_desc ealg_list[] = {
290{
291 .name = "ecb(cipher_null)",
292 .compat = "cipher_null",
293
294 .uinfo = {
295 .encr = {
296 .blockbits = 8,
297 .defkeybits = 0,
298 }
299 },
300
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{
309 .name = "cbc(des)",
310 .compat = "des",
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{
327 .name = "cbc(des3_ede)",
328 .compat = "des3_ede",
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{
345 .name = "cbc(cast5)",
346 .compat = "cast5",
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{
363 .name = "cbc(blowfish)",
364 .compat = "blowfish",
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{
381 .name = "cbc(aes)",
382 .compat = "aes",
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{
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 }
415},
416{
417 .name = "cbc(camellia)",
418 .compat = "camellia",
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},
434{
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 }
451},
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 = 160,
466 .sadb_alg_maxbits = 288
467 }
468},
469};
470
471static 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
501static inline int aead_entries(void)
502{
503 return ARRAY_SIZE(aead_list);
504}
505
506static inline int aalg_entries(void)
507{
508 return ARRAY_SIZE(aalg_list);
509}
510
511static inline int ealg_entries(void)
512{
513 return ARRAY_SIZE(ealg_list);
514}
515
516static inline int calg_entries(void)
517{
518 return ARRAY_SIZE(calg_list);
519}
520
521struct xfrm_algo_list {
522 struct xfrm_algo_desc *algs;
523 int entries;
524 u32 type;
525 u32 mask;
526};
527
528static 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
535static const struct xfrm_algo_list xfrm_aalg_list = {
536 .algs = aalg_list,
537 .entries = ARRAY_SIZE(aalg_list),
538 .type = CRYPTO_ALG_TYPE_HASH,
539 .mask = CRYPTO_ALG_TYPE_HASH_MASK,
540};
541
542static const struct xfrm_algo_list xfrm_ealg_list = {
543 .algs = ealg_list,
544 .entries = ARRAY_SIZE(ealg_list),
545 .type = CRYPTO_ALG_TYPE_BLKCIPHER,
546 .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
547};
548
549static const struct xfrm_algo_list xfrm_calg_list = {
550 .algs = calg_list,
551 .entries = ARRAY_SIZE(calg_list),
552 .type = CRYPTO_ALG_TYPE_COMPRESS,
553 .mask = CRYPTO_ALG_TYPE_MASK,
554};
555
556static 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)
560{
561 struct xfrm_algo_desc *list = algo_list->algs;
562 int i, status;
563
564 for (i = 0; i < algo_list->entries; i++) {
565 if (!match(list + i, data))
566 continue;
567
568 if (list[i].available)
569 return &list[i];
570
571 if (!probe)
572 break;
573
574 status = crypto_has_alg(list[i].name, algo_list->type,
575 algo_list->mask);
576 if (!status)
577 break;
578
579 list[i].available = status;
580 return &list[i];
581 }
582 return NULL;
583}
584
585static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
586 const void *data)
587{
588 return entry->desc.sadb_alg_id == (unsigned long)data;
589}
590
591struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
592{
593 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
594 (void *)(unsigned long)alg_id, 1);
595}
596EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
597
598struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
599{
600 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
601 (void *)(unsigned long)alg_id, 1);
602}
603EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
604
605struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
606{
607 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
608 (void *)(unsigned long)alg_id, 1);
609}
610EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
611
612static 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
621struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
622{
623 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
624 probe);
625}
626EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
627
628struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
629{
630 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
631 probe);
632}
633EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
634
635struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
636{
637 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
638 probe);
639}
640EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
641
642struct xfrm_aead_name {
643 const char *name;
644 int icvbits;
645};
646
647static 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
657struct xfrm_algo_desc *xfrm_aead_get_byname(const 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}
667EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
668
669struct 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}
676EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
677
678struct 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}
685EXPORT_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 */
692void xfrm_probe_algs(void)
693{
694 int i, status;
695
696 BUG_ON(in_softirq());
697
698 for (i = 0; i < aalg_entries(); i++) {
699 status = crypto_has_hash(aalg_list[i].name, 0,
700 CRYPTO_ALG_ASYNC);
701 if (aalg_list[i].available != status)
702 aalg_list[i].available = status;
703 }
704
705 for (i = 0; i < ealg_entries(); i++) {
706 status = crypto_has_blkcipher(ealg_list[i].name, 0,
707 CRYPTO_ALG_ASYNC);
708 if (ealg_list[i].available != status)
709 ealg_list[i].available = status;
710 }
711
712 for (i = 0; i < calg_entries(); i++) {
713 status = crypto_has_comp(calg_list[i].name, 0,
714 CRYPTO_ALG_ASYNC);
715 if (calg_list[i].available != status)
716 calg_list[i].available = status;
717 }
718}
719EXPORT_SYMBOL_GPL(xfrm_probe_algs);
720
721int 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}
730EXPORT_SYMBOL_GPL(xfrm_count_auth_supported);
731
732int 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}
741EXPORT_SYMBOL_GPL(xfrm_count_enc_supported);
742
743#if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)
744
745void *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}
753EXPORT_SYMBOL_GPL(pskb_put);
754#endif