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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_SKCIPHER,
630 .mask = CRYPTO_ALG_TYPE_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 <crypto/hash.h>
13#include <crypto/skcipher.h>
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/pfkeyv2.h>
17#include <linux/crypto.h>
18#include <linux/scatterlist.h>
19#include <net/xfrm.h>
20#if IS_ENABLED(CONFIG_INET_ESP) || IS_ENABLED(CONFIG_INET6_ESP)
21#include <net/esp.h>
22#endif
23
24/*
25 * Algorithms supported by IPsec. These entries contain properties which
26 * are used in key negotiation and xfrm processing, and are used to verify
27 * that instantiated crypto transforms have correct parameters for IPsec
28 * purposes.
29 */
30static struct xfrm_algo_desc aead_list[] = {
31{
32 .name = "rfc4106(gcm(aes))",
33
34 .uinfo = {
35 .aead = {
36 .geniv = "seqiv",
37 .icv_truncbits = 64,
38 }
39 },
40
41 .pfkey_supported = 1,
42
43 .desc = {
44 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
45 .sadb_alg_ivlen = 8,
46 .sadb_alg_minbits = 128,
47 .sadb_alg_maxbits = 256
48 }
49},
50{
51 .name = "rfc4106(gcm(aes))",
52
53 .uinfo = {
54 .aead = {
55 .geniv = "seqiv",
56 .icv_truncbits = 96,
57 }
58 },
59
60 .pfkey_supported = 1,
61
62 .desc = {
63 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
64 .sadb_alg_ivlen = 8,
65 .sadb_alg_minbits = 128,
66 .sadb_alg_maxbits = 256
67 }
68},
69{
70 .name = "rfc4106(gcm(aes))",
71
72 .uinfo = {
73 .aead = {
74 .geniv = "seqiv",
75 .icv_truncbits = 128,
76 }
77 },
78
79 .pfkey_supported = 1,
80
81 .desc = {
82 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
83 .sadb_alg_ivlen = 8,
84 .sadb_alg_minbits = 128,
85 .sadb_alg_maxbits = 256
86 }
87},
88{
89 .name = "rfc4309(ccm(aes))",
90
91 .uinfo = {
92 .aead = {
93 .geniv = "seqiv",
94 .icv_truncbits = 64,
95 }
96 },
97
98 .pfkey_supported = 1,
99
100 .desc = {
101 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
102 .sadb_alg_ivlen = 8,
103 .sadb_alg_minbits = 128,
104 .sadb_alg_maxbits = 256
105 }
106},
107{
108 .name = "rfc4309(ccm(aes))",
109
110 .uinfo = {
111 .aead = {
112 .geniv = "seqiv",
113 .icv_truncbits = 96,
114 }
115 },
116
117 .pfkey_supported = 1,
118
119 .desc = {
120 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
121 .sadb_alg_ivlen = 8,
122 .sadb_alg_minbits = 128,
123 .sadb_alg_maxbits = 256
124 }
125},
126{
127 .name = "rfc4309(ccm(aes))",
128
129 .uinfo = {
130 .aead = {
131 .geniv = "seqiv",
132 .icv_truncbits = 128,
133 }
134 },
135
136 .pfkey_supported = 1,
137
138 .desc = {
139 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
140 .sadb_alg_ivlen = 8,
141 .sadb_alg_minbits = 128,
142 .sadb_alg_maxbits = 256
143 }
144},
145{
146 .name = "rfc4543(gcm(aes))",
147
148 .uinfo = {
149 .aead = {
150 .geniv = "seqiv",
151 .icv_truncbits = 128,
152 }
153 },
154
155 .pfkey_supported = 1,
156
157 .desc = {
158 .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
159 .sadb_alg_ivlen = 8,
160 .sadb_alg_minbits = 128,
161 .sadb_alg_maxbits = 256
162 }
163},
164{
165 .name = "rfc7539esp(chacha20,poly1305)",
166
167 .uinfo = {
168 .aead = {
169 .geniv = "seqiv",
170 .icv_truncbits = 128,
171 }
172 },
173
174 .pfkey_supported = 0,
175},
176};
177
178static struct xfrm_algo_desc aalg_list[] = {
179{
180 .name = "digest_null",
181
182 .uinfo = {
183 .auth = {
184 .icv_truncbits = 0,
185 .icv_fullbits = 0,
186 }
187 },
188
189 .pfkey_supported = 1,
190
191 .desc = {
192 .sadb_alg_id = SADB_X_AALG_NULL,
193 .sadb_alg_ivlen = 0,
194 .sadb_alg_minbits = 0,
195 .sadb_alg_maxbits = 0
196 }
197},
198{
199 .name = "hmac(md5)",
200 .compat = "md5",
201
202 .uinfo = {
203 .auth = {
204 .icv_truncbits = 96,
205 .icv_fullbits = 128,
206 }
207 },
208
209 .pfkey_supported = 1,
210
211 .desc = {
212 .sadb_alg_id = SADB_AALG_MD5HMAC,
213 .sadb_alg_ivlen = 0,
214 .sadb_alg_minbits = 128,
215 .sadb_alg_maxbits = 128
216 }
217},
218{
219 .name = "hmac(sha1)",
220 .compat = "sha1",
221
222 .uinfo = {
223 .auth = {
224 .icv_truncbits = 96,
225 .icv_fullbits = 160,
226 }
227 },
228
229 .pfkey_supported = 1,
230
231 .desc = {
232 .sadb_alg_id = SADB_AALG_SHA1HMAC,
233 .sadb_alg_ivlen = 0,
234 .sadb_alg_minbits = 160,
235 .sadb_alg_maxbits = 160
236 }
237},
238{
239 .name = "hmac(sha256)",
240 .compat = "sha256",
241
242 .uinfo = {
243 .auth = {
244 .icv_truncbits = 96,
245 .icv_fullbits = 256,
246 }
247 },
248
249 .pfkey_supported = 1,
250
251 .desc = {
252 .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
253 .sadb_alg_ivlen = 0,
254 .sadb_alg_minbits = 256,
255 .sadb_alg_maxbits = 256
256 }
257},
258{
259 .name = "hmac(sha384)",
260
261 .uinfo = {
262 .auth = {
263 .icv_truncbits = 192,
264 .icv_fullbits = 384,
265 }
266 },
267
268 .pfkey_supported = 1,
269
270 .desc = {
271 .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
272 .sadb_alg_ivlen = 0,
273 .sadb_alg_minbits = 384,
274 .sadb_alg_maxbits = 384
275 }
276},
277{
278 .name = "hmac(sha512)",
279
280 .uinfo = {
281 .auth = {
282 .icv_truncbits = 256,
283 .icv_fullbits = 512,
284 }
285 },
286
287 .pfkey_supported = 1,
288
289 .desc = {
290 .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
291 .sadb_alg_ivlen = 0,
292 .sadb_alg_minbits = 512,
293 .sadb_alg_maxbits = 512
294 }
295},
296{
297 .name = "hmac(rmd160)",
298 .compat = "rmd160",
299
300 .uinfo = {
301 .auth = {
302 .icv_truncbits = 96,
303 .icv_fullbits = 160,
304 }
305 },
306
307 .pfkey_supported = 1,
308
309 .desc = {
310 .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
311 .sadb_alg_ivlen = 0,
312 .sadb_alg_minbits = 160,
313 .sadb_alg_maxbits = 160
314 }
315},
316{
317 .name = "xcbc(aes)",
318
319 .uinfo = {
320 .auth = {
321 .icv_truncbits = 96,
322 .icv_fullbits = 128,
323 }
324 },
325
326 .pfkey_supported = 1,
327
328 .desc = {
329 .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
330 .sadb_alg_ivlen = 0,
331 .sadb_alg_minbits = 128,
332 .sadb_alg_maxbits = 128
333 }
334},
335{
336 /* rfc4494 */
337 .name = "cmac(aes)",
338
339 .uinfo = {
340 .auth = {
341 .icv_truncbits = 96,
342 .icv_fullbits = 128,
343 }
344 },
345
346 .pfkey_supported = 0,
347},
348};
349
350static struct xfrm_algo_desc ealg_list[] = {
351{
352 .name = "ecb(cipher_null)",
353 .compat = "cipher_null",
354
355 .uinfo = {
356 .encr = {
357 .blockbits = 8,
358 .defkeybits = 0,
359 }
360 },
361
362 .pfkey_supported = 1,
363
364 .desc = {
365 .sadb_alg_id = SADB_EALG_NULL,
366 .sadb_alg_ivlen = 0,
367 .sadb_alg_minbits = 0,
368 .sadb_alg_maxbits = 0
369 }
370},
371{
372 .name = "cbc(des)",
373 .compat = "des",
374
375 .uinfo = {
376 .encr = {
377 .geniv = "echainiv",
378 .blockbits = 64,
379 .defkeybits = 64,
380 }
381 },
382
383 .pfkey_supported = 1,
384
385 .desc = {
386 .sadb_alg_id = SADB_EALG_DESCBC,
387 .sadb_alg_ivlen = 8,
388 .sadb_alg_minbits = 64,
389 .sadb_alg_maxbits = 64
390 }
391},
392{
393 .name = "cbc(des3_ede)",
394 .compat = "des3_ede",
395
396 .uinfo = {
397 .encr = {
398 .geniv = "echainiv",
399 .blockbits = 64,
400 .defkeybits = 192,
401 }
402 },
403
404 .pfkey_supported = 1,
405
406 .desc = {
407 .sadb_alg_id = SADB_EALG_3DESCBC,
408 .sadb_alg_ivlen = 8,
409 .sadb_alg_minbits = 192,
410 .sadb_alg_maxbits = 192
411 }
412},
413{
414 .name = "cbc(cast5)",
415 .compat = "cast5",
416
417 .uinfo = {
418 .encr = {
419 .geniv = "echainiv",
420 .blockbits = 64,
421 .defkeybits = 128,
422 }
423 },
424
425 .pfkey_supported = 1,
426
427 .desc = {
428 .sadb_alg_id = SADB_X_EALG_CASTCBC,
429 .sadb_alg_ivlen = 8,
430 .sadb_alg_minbits = 40,
431 .sadb_alg_maxbits = 128
432 }
433},
434{
435 .name = "cbc(blowfish)",
436 .compat = "blowfish",
437
438 .uinfo = {
439 .encr = {
440 .geniv = "echainiv",
441 .blockbits = 64,
442 .defkeybits = 128,
443 }
444 },
445
446 .pfkey_supported = 1,
447
448 .desc = {
449 .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
450 .sadb_alg_ivlen = 8,
451 .sadb_alg_minbits = 40,
452 .sadb_alg_maxbits = 448
453 }
454},
455{
456 .name = "cbc(aes)",
457 .compat = "aes",
458
459 .uinfo = {
460 .encr = {
461 .geniv = "echainiv",
462 .blockbits = 128,
463 .defkeybits = 128,
464 }
465 },
466
467 .pfkey_supported = 1,
468
469 .desc = {
470 .sadb_alg_id = SADB_X_EALG_AESCBC,
471 .sadb_alg_ivlen = 8,
472 .sadb_alg_minbits = 128,
473 .sadb_alg_maxbits = 256
474 }
475},
476{
477 .name = "cbc(serpent)",
478 .compat = "serpent",
479
480 .uinfo = {
481 .encr = {
482 .geniv = "echainiv",
483 .blockbits = 128,
484 .defkeybits = 128,
485 }
486 },
487
488 .pfkey_supported = 1,
489
490 .desc = {
491 .sadb_alg_id = SADB_X_EALG_SERPENTCBC,
492 .sadb_alg_ivlen = 8,
493 .sadb_alg_minbits = 128,
494 .sadb_alg_maxbits = 256,
495 }
496},
497{
498 .name = "cbc(camellia)",
499 .compat = "camellia",
500
501 .uinfo = {
502 .encr = {
503 .geniv = "echainiv",
504 .blockbits = 128,
505 .defkeybits = 128,
506 }
507 },
508
509 .pfkey_supported = 1,
510
511 .desc = {
512 .sadb_alg_id = SADB_X_EALG_CAMELLIACBC,
513 .sadb_alg_ivlen = 8,
514 .sadb_alg_minbits = 128,
515 .sadb_alg_maxbits = 256
516 }
517},
518{
519 .name = "cbc(twofish)",
520 .compat = "twofish",
521
522 .uinfo = {
523 .encr = {
524 .geniv = "echainiv",
525 .blockbits = 128,
526 .defkeybits = 128,
527 }
528 },
529
530 .pfkey_supported = 1,
531
532 .desc = {
533 .sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
534 .sadb_alg_ivlen = 8,
535 .sadb_alg_minbits = 128,
536 .sadb_alg_maxbits = 256
537 }
538},
539{
540 .name = "rfc3686(ctr(aes))",
541
542 .uinfo = {
543 .encr = {
544 .geniv = "seqiv",
545 .blockbits = 128,
546 .defkeybits = 160, /* 128-bit key + 32-bit nonce */
547 }
548 },
549
550 .pfkey_supported = 1,
551
552 .desc = {
553 .sadb_alg_id = SADB_X_EALG_AESCTR,
554 .sadb_alg_ivlen = 8,
555 .sadb_alg_minbits = 160,
556 .sadb_alg_maxbits = 288
557 }
558},
559};
560
561static struct xfrm_algo_desc calg_list[] = {
562{
563 .name = "deflate",
564 .uinfo = {
565 .comp = {
566 .threshold = 90,
567 }
568 },
569 .pfkey_supported = 1,
570 .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
571},
572{
573 .name = "lzs",
574 .uinfo = {
575 .comp = {
576 .threshold = 90,
577 }
578 },
579 .pfkey_supported = 1,
580 .desc = { .sadb_alg_id = SADB_X_CALG_LZS }
581},
582{
583 .name = "lzjh",
584 .uinfo = {
585 .comp = {
586 .threshold = 50,
587 }
588 },
589 .pfkey_supported = 1,
590 .desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
591},
592};
593
594static inline int aalg_entries(void)
595{
596 return ARRAY_SIZE(aalg_list);
597}
598
599static inline int ealg_entries(void)
600{
601 return ARRAY_SIZE(ealg_list);
602}
603
604static inline int calg_entries(void)
605{
606 return ARRAY_SIZE(calg_list);
607}
608
609struct xfrm_algo_list {
610 struct xfrm_algo_desc *algs;
611 int entries;
612 u32 type;
613 u32 mask;
614};
615
616static const struct xfrm_algo_list xfrm_aead_list = {
617 .algs = aead_list,
618 .entries = ARRAY_SIZE(aead_list),
619 .type = CRYPTO_ALG_TYPE_AEAD,
620 .mask = CRYPTO_ALG_TYPE_MASK,
621};
622
623static const struct xfrm_algo_list xfrm_aalg_list = {
624 .algs = aalg_list,
625 .entries = ARRAY_SIZE(aalg_list),
626 .type = CRYPTO_ALG_TYPE_HASH,
627 .mask = CRYPTO_ALG_TYPE_HASH_MASK,
628};
629
630static const struct xfrm_algo_list xfrm_ealg_list = {
631 .algs = ealg_list,
632 .entries = ARRAY_SIZE(ealg_list),
633 .type = CRYPTO_ALG_TYPE_BLKCIPHER,
634 .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
635};
636
637static const struct xfrm_algo_list xfrm_calg_list = {
638 .algs = calg_list,
639 .entries = ARRAY_SIZE(calg_list),
640 .type = CRYPTO_ALG_TYPE_COMPRESS,
641 .mask = CRYPTO_ALG_TYPE_MASK,
642};
643
644static struct xfrm_algo_desc *xfrm_find_algo(
645 const struct xfrm_algo_list *algo_list,
646 int match(const struct xfrm_algo_desc *entry, const void *data),
647 const void *data, int probe)
648{
649 struct xfrm_algo_desc *list = algo_list->algs;
650 int i, status;
651
652 for (i = 0; i < algo_list->entries; i++) {
653 if (!match(list + i, data))
654 continue;
655
656 if (list[i].available)
657 return &list[i];
658
659 if (!probe)
660 break;
661
662 status = crypto_has_alg(list[i].name, algo_list->type,
663 algo_list->mask);
664 if (!status)
665 break;
666
667 list[i].available = status;
668 return &list[i];
669 }
670 return NULL;
671}
672
673static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
674 const void *data)
675{
676 return entry->desc.sadb_alg_id == (unsigned long)data;
677}
678
679struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
680{
681 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
682 (void *)(unsigned long)alg_id, 1);
683}
684EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
685
686struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
687{
688 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
689 (void *)(unsigned long)alg_id, 1);
690}
691EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
692
693struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
694{
695 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
696 (void *)(unsigned long)alg_id, 1);
697}
698EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
699
700static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
701 const void *data)
702{
703 const char *name = data;
704
705 return name && (!strcmp(name, entry->name) ||
706 (entry->compat && !strcmp(name, entry->compat)));
707}
708
709struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
710{
711 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
712 probe);
713}
714EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
715
716struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
717{
718 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
719 probe);
720}
721EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
722
723struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
724{
725 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
726 probe);
727}
728EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
729
730struct xfrm_aead_name {
731 const char *name;
732 int icvbits;
733};
734
735static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
736 const void *data)
737{
738 const struct xfrm_aead_name *aead = data;
739 const char *name = aead->name;
740
741 return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
742 !strcmp(name, entry->name);
743}
744
745struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe)
746{
747 struct xfrm_aead_name data = {
748 .name = name,
749 .icvbits = icv_len,
750 };
751
752 return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
753 probe);
754}
755EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
756
757struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
758{
759 if (idx >= aalg_entries())
760 return NULL;
761
762 return &aalg_list[idx];
763}
764EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
765
766struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
767{
768 if (idx >= ealg_entries())
769 return NULL;
770
771 return &ealg_list[idx];
772}
773EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);
774
775/*
776 * Probe for the availability of crypto algorithms, and set the available
777 * flag for any algorithms found on the system. This is typically called by
778 * pfkey during userspace SA add, update or register.
779 */
780void xfrm_probe_algs(void)
781{
782 int i, status;
783
784 BUG_ON(in_softirq());
785
786 for (i = 0; i < aalg_entries(); i++) {
787 status = crypto_has_ahash(aalg_list[i].name, 0, 0);
788 if (aalg_list[i].available != status)
789 aalg_list[i].available = status;
790 }
791
792 for (i = 0; i < ealg_entries(); i++) {
793 status = crypto_has_skcipher(ealg_list[i].name, 0, 0);
794 if (ealg_list[i].available != status)
795 ealg_list[i].available = status;
796 }
797
798 for (i = 0; i < calg_entries(); i++) {
799 status = crypto_has_comp(calg_list[i].name, 0,
800 CRYPTO_ALG_ASYNC);
801 if (calg_list[i].available != status)
802 calg_list[i].available = status;
803 }
804}
805EXPORT_SYMBOL_GPL(xfrm_probe_algs);
806
807int xfrm_count_pfkey_auth_supported(void)
808{
809 int i, n;
810
811 for (i = 0, n = 0; i < aalg_entries(); i++)
812 if (aalg_list[i].available && aalg_list[i].pfkey_supported)
813 n++;
814 return n;
815}
816EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);
817
818int xfrm_count_pfkey_enc_supported(void)
819{
820 int i, n;
821
822 for (i = 0, n = 0; i < ealg_entries(); i++)
823 if (ealg_list[i].available && ealg_list[i].pfkey_supported)
824 n++;
825 return n;
826}
827EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);
828
829MODULE_LICENSE("GPL");