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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/aead.h>
9#include <crypto/hash.h>
10#include <crypto/skcipher.h>
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/pfkeyv2.h>
14#include <linux/crypto.h>
15#include <linux/scatterlist.h>
16#include <net/xfrm.h>
17#if IS_ENABLED(CONFIG_INET_ESP) || IS_ENABLED(CONFIG_INET6_ESP)
18#include <net/esp.h>
19#endif
20
21/*
22 * Algorithms supported by IPsec. These entries contain properties which
23 * are used in key negotiation and xfrm processing, and are used to verify
24 * that instantiated crypto transforms have correct parameters for IPsec
25 * purposes.
26 */
27static struct xfrm_algo_desc aead_list[] = {
28{
29 .name = "rfc4106(gcm(aes))",
30
31 .uinfo = {
32 .aead = {
33 .geniv = "seqiv",
34 .icv_truncbits = 64,
35 }
36 },
37
38 .pfkey_supported = 1,
39
40 .desc = {
41 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
42 .sadb_alg_ivlen = 8,
43 .sadb_alg_minbits = 128,
44 .sadb_alg_maxbits = 256
45 }
46},
47{
48 .name = "rfc4106(gcm(aes))",
49
50 .uinfo = {
51 .aead = {
52 .geniv = "seqiv",
53 .icv_truncbits = 96,
54 }
55 },
56
57 .pfkey_supported = 1,
58
59 .desc = {
60 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
61 .sadb_alg_ivlen = 8,
62 .sadb_alg_minbits = 128,
63 .sadb_alg_maxbits = 256
64 }
65},
66{
67 .name = "rfc4106(gcm(aes))",
68
69 .uinfo = {
70 .aead = {
71 .geniv = "seqiv",
72 .icv_truncbits = 128,
73 }
74 },
75
76 .pfkey_supported = 1,
77
78 .desc = {
79 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
80 .sadb_alg_ivlen = 8,
81 .sadb_alg_minbits = 128,
82 .sadb_alg_maxbits = 256
83 }
84},
85{
86 .name = "rfc4309(ccm(aes))",
87
88 .uinfo = {
89 .aead = {
90 .geniv = "seqiv",
91 .icv_truncbits = 64,
92 }
93 },
94
95 .pfkey_supported = 1,
96
97 .desc = {
98 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
99 .sadb_alg_ivlen = 8,
100 .sadb_alg_minbits = 128,
101 .sadb_alg_maxbits = 256
102 }
103},
104{
105 .name = "rfc4309(ccm(aes))",
106
107 .uinfo = {
108 .aead = {
109 .geniv = "seqiv",
110 .icv_truncbits = 96,
111 }
112 },
113
114 .pfkey_supported = 1,
115
116 .desc = {
117 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
118 .sadb_alg_ivlen = 8,
119 .sadb_alg_minbits = 128,
120 .sadb_alg_maxbits = 256
121 }
122},
123{
124 .name = "rfc4309(ccm(aes))",
125
126 .uinfo = {
127 .aead = {
128 .geniv = "seqiv",
129 .icv_truncbits = 128,
130 }
131 },
132
133 .pfkey_supported = 1,
134
135 .desc = {
136 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
137 .sadb_alg_ivlen = 8,
138 .sadb_alg_minbits = 128,
139 .sadb_alg_maxbits = 256
140 }
141},
142{
143 .name = "rfc4543(gcm(aes))",
144
145 .uinfo = {
146 .aead = {
147 .geniv = "seqiv",
148 .icv_truncbits = 128,
149 }
150 },
151
152 .pfkey_supported = 1,
153
154 .desc = {
155 .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
156 .sadb_alg_ivlen = 8,
157 .sadb_alg_minbits = 128,
158 .sadb_alg_maxbits = 256
159 }
160},
161{
162 .name = "rfc7539esp(chacha20,poly1305)",
163
164 .uinfo = {
165 .aead = {
166 .geniv = "seqiv",
167 .icv_truncbits = 128,
168 }
169 },
170
171 .pfkey_supported = 0,
172},
173};
174
175static struct xfrm_algo_desc aalg_list[] = {
176{
177 .name = "digest_null",
178
179 .uinfo = {
180 .auth = {
181 .icv_truncbits = 0,
182 .icv_fullbits = 0,
183 }
184 },
185
186 .pfkey_supported = 1,
187
188 .desc = {
189 .sadb_alg_id = SADB_X_AALG_NULL,
190 .sadb_alg_ivlen = 0,
191 .sadb_alg_minbits = 0,
192 .sadb_alg_maxbits = 0
193 }
194},
195{
196 .name = "hmac(md5)",
197 .compat = "md5",
198
199 .uinfo = {
200 .auth = {
201 .icv_truncbits = 96,
202 .icv_fullbits = 128,
203 }
204 },
205
206 .pfkey_supported = 1,
207
208 .desc = {
209 .sadb_alg_id = SADB_AALG_MD5HMAC,
210 .sadb_alg_ivlen = 0,
211 .sadb_alg_minbits = 128,
212 .sadb_alg_maxbits = 128
213 }
214},
215{
216 .name = "hmac(sha1)",
217 .compat = "sha1",
218
219 .uinfo = {
220 .auth = {
221 .icv_truncbits = 96,
222 .icv_fullbits = 160,
223 }
224 },
225
226 .pfkey_supported = 1,
227
228 .desc = {
229 .sadb_alg_id = SADB_AALG_SHA1HMAC,
230 .sadb_alg_ivlen = 0,
231 .sadb_alg_minbits = 160,
232 .sadb_alg_maxbits = 160
233 }
234},
235{
236 .name = "hmac(sha256)",
237 .compat = "sha256",
238
239 .uinfo = {
240 .auth = {
241 .icv_truncbits = 96,
242 .icv_fullbits = 256,
243 }
244 },
245
246 .pfkey_supported = 1,
247
248 .desc = {
249 .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
250 .sadb_alg_ivlen = 0,
251 .sadb_alg_minbits = 256,
252 .sadb_alg_maxbits = 256
253 }
254},
255{
256 .name = "hmac(sha384)",
257
258 .uinfo = {
259 .auth = {
260 .icv_truncbits = 192,
261 .icv_fullbits = 384,
262 }
263 },
264
265 .pfkey_supported = 1,
266
267 .desc = {
268 .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
269 .sadb_alg_ivlen = 0,
270 .sadb_alg_minbits = 384,
271 .sadb_alg_maxbits = 384
272 }
273},
274{
275 .name = "hmac(sha512)",
276
277 .uinfo = {
278 .auth = {
279 .icv_truncbits = 256,
280 .icv_fullbits = 512,
281 }
282 },
283
284 .pfkey_supported = 1,
285
286 .desc = {
287 .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
288 .sadb_alg_ivlen = 0,
289 .sadb_alg_minbits = 512,
290 .sadb_alg_maxbits = 512
291 }
292},
293{
294 .name = "hmac(rmd160)",
295 .compat = "rmd160",
296
297 .uinfo = {
298 .auth = {
299 .icv_truncbits = 96,
300 .icv_fullbits = 160,
301 }
302 },
303
304 .pfkey_supported = 1,
305
306 .desc = {
307 .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
308 .sadb_alg_ivlen = 0,
309 .sadb_alg_minbits = 160,
310 .sadb_alg_maxbits = 160
311 }
312},
313{
314 .name = "xcbc(aes)",
315
316 .uinfo = {
317 .auth = {
318 .icv_truncbits = 96,
319 .icv_fullbits = 128,
320 }
321 },
322
323 .pfkey_supported = 1,
324
325 .desc = {
326 .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
327 .sadb_alg_ivlen = 0,
328 .sadb_alg_minbits = 128,
329 .sadb_alg_maxbits = 128
330 }
331},
332{
333 /* rfc4494 */
334 .name = "cmac(aes)",
335
336 .uinfo = {
337 .auth = {
338 .icv_truncbits = 96,
339 .icv_fullbits = 128,
340 }
341 },
342
343 .pfkey_supported = 0,
344},
345{
346 .name = "hmac(sm3)",
347 .compat = "sm3",
348
349 .uinfo = {
350 .auth = {
351 .icv_truncbits = 256,
352 .icv_fullbits = 256,
353 }
354 },
355
356 .pfkey_supported = 1,
357
358 .desc = {
359 .sadb_alg_id = SADB_X_AALG_SM3_256HMAC,
360 .sadb_alg_ivlen = 0,
361 .sadb_alg_minbits = 256,
362 .sadb_alg_maxbits = 256
363 }
364},
365};
366
367static struct xfrm_algo_desc ealg_list[] = {
368{
369 .name = "ecb(cipher_null)",
370 .compat = "cipher_null",
371
372 .uinfo = {
373 .encr = {
374 .blockbits = 8,
375 .defkeybits = 0,
376 }
377 },
378
379 .pfkey_supported = 1,
380
381 .desc = {
382 .sadb_alg_id = SADB_EALG_NULL,
383 .sadb_alg_ivlen = 0,
384 .sadb_alg_minbits = 0,
385 .sadb_alg_maxbits = 0
386 }
387},
388{
389 .name = "cbc(des)",
390 .compat = "des",
391
392 .uinfo = {
393 .encr = {
394 .geniv = "echainiv",
395 .blockbits = 64,
396 .defkeybits = 64,
397 }
398 },
399
400 .pfkey_supported = 1,
401
402 .desc = {
403 .sadb_alg_id = SADB_EALG_DESCBC,
404 .sadb_alg_ivlen = 8,
405 .sadb_alg_minbits = 64,
406 .sadb_alg_maxbits = 64
407 }
408},
409{
410 .name = "cbc(des3_ede)",
411 .compat = "des3_ede",
412
413 .uinfo = {
414 .encr = {
415 .geniv = "echainiv",
416 .blockbits = 64,
417 .defkeybits = 192,
418 }
419 },
420
421 .pfkey_supported = 1,
422
423 .desc = {
424 .sadb_alg_id = SADB_EALG_3DESCBC,
425 .sadb_alg_ivlen = 8,
426 .sadb_alg_minbits = 192,
427 .sadb_alg_maxbits = 192
428 }
429},
430{
431 .name = "cbc(cast5)",
432 .compat = "cast5",
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_CASTCBC,
446 .sadb_alg_ivlen = 8,
447 .sadb_alg_minbits = 40,
448 .sadb_alg_maxbits = 128
449 }
450},
451{
452 .name = "cbc(blowfish)",
453 .compat = "blowfish",
454
455 .uinfo = {
456 .encr = {
457 .geniv = "echainiv",
458 .blockbits = 64,
459 .defkeybits = 128,
460 }
461 },
462
463 .pfkey_supported = 1,
464
465 .desc = {
466 .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
467 .sadb_alg_ivlen = 8,
468 .sadb_alg_minbits = 40,
469 .sadb_alg_maxbits = 448
470 }
471},
472{
473 .name = "cbc(aes)",
474 .compat = "aes",
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_AESCBC,
488 .sadb_alg_ivlen = 8,
489 .sadb_alg_minbits = 128,
490 .sadb_alg_maxbits = 256
491 }
492},
493{
494 .name = "cbc(serpent)",
495 .compat = "serpent",
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_SERPENTCBC,
509 .sadb_alg_ivlen = 8,
510 .sadb_alg_minbits = 128,
511 .sadb_alg_maxbits = 256,
512 }
513},
514{
515 .name = "cbc(camellia)",
516 .compat = "camellia",
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_CAMELLIACBC,
530 .sadb_alg_ivlen = 8,
531 .sadb_alg_minbits = 128,
532 .sadb_alg_maxbits = 256
533 }
534},
535{
536 .name = "cbc(twofish)",
537 .compat = "twofish",
538
539 .uinfo = {
540 .encr = {
541 .geniv = "echainiv",
542 .blockbits = 128,
543 .defkeybits = 128,
544 }
545 },
546
547 .pfkey_supported = 1,
548
549 .desc = {
550 .sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
551 .sadb_alg_ivlen = 8,
552 .sadb_alg_minbits = 128,
553 .sadb_alg_maxbits = 256
554 }
555},
556{
557 .name = "rfc3686(ctr(aes))",
558
559 .uinfo = {
560 .encr = {
561 .geniv = "seqiv",
562 .blockbits = 128,
563 .defkeybits = 160, /* 128-bit key + 32-bit nonce */
564 }
565 },
566
567 .pfkey_supported = 1,
568
569 .desc = {
570 .sadb_alg_id = SADB_X_EALG_AESCTR,
571 .sadb_alg_ivlen = 8,
572 .sadb_alg_minbits = 160,
573 .sadb_alg_maxbits = 288
574 }
575},
576{
577 .name = "cbc(sm4)",
578 .compat = "sm4",
579
580 .uinfo = {
581 .encr = {
582 .geniv = "echainiv",
583 .blockbits = 128,
584 .defkeybits = 128,
585 }
586 },
587
588 .pfkey_supported = 1,
589
590 .desc = {
591 .sadb_alg_id = SADB_X_EALG_SM4CBC,
592 .sadb_alg_ivlen = 16,
593 .sadb_alg_minbits = 128,
594 .sadb_alg_maxbits = 256
595 }
596},
597};
598
599static struct xfrm_algo_desc calg_list[] = {
600{
601 .name = "deflate",
602 .uinfo = {
603 .comp = {
604 .threshold = 90,
605 }
606 },
607 .pfkey_supported = 1,
608 .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
609},
610{
611 .name = "lzs",
612 .uinfo = {
613 .comp = {
614 .threshold = 90,
615 }
616 },
617 .pfkey_supported = 1,
618 .desc = { .sadb_alg_id = SADB_X_CALG_LZS }
619},
620{
621 .name = "lzjh",
622 .uinfo = {
623 .comp = {
624 .threshold = 50,
625 }
626 },
627 .pfkey_supported = 1,
628 .desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
629},
630};
631
632static inline int aalg_entries(void)
633{
634 return ARRAY_SIZE(aalg_list);
635}
636
637static inline int ealg_entries(void)
638{
639 return ARRAY_SIZE(ealg_list);
640}
641
642static inline int calg_entries(void)
643{
644 return ARRAY_SIZE(calg_list);
645}
646
647struct xfrm_algo_list {
648 int (*find)(const char *name, u32 type, u32 mask);
649 struct xfrm_algo_desc *algs;
650 int entries;
651};
652
653static const struct xfrm_algo_list xfrm_aead_list = {
654 .find = crypto_has_aead,
655 .algs = aead_list,
656 .entries = ARRAY_SIZE(aead_list),
657};
658
659static const struct xfrm_algo_list xfrm_aalg_list = {
660 .find = crypto_has_ahash,
661 .algs = aalg_list,
662 .entries = ARRAY_SIZE(aalg_list),
663};
664
665static const struct xfrm_algo_list xfrm_ealg_list = {
666 .find = crypto_has_skcipher,
667 .algs = ealg_list,
668 .entries = ARRAY_SIZE(ealg_list),
669};
670
671static const struct xfrm_algo_list xfrm_calg_list = {
672 .find = crypto_has_comp,
673 .algs = calg_list,
674 .entries = ARRAY_SIZE(calg_list),
675};
676
677static struct xfrm_algo_desc *xfrm_find_algo(
678 const struct xfrm_algo_list *algo_list,
679 int match(const struct xfrm_algo_desc *entry, const void *data),
680 const void *data, int probe)
681{
682 struct xfrm_algo_desc *list = algo_list->algs;
683 int i, status;
684
685 for (i = 0; i < algo_list->entries; i++) {
686 if (!match(list + i, data))
687 continue;
688
689 if (list[i].available)
690 return &list[i];
691
692 if (!probe)
693 break;
694
695 status = algo_list->find(list[i].name, 0, 0);
696 if (!status)
697 break;
698
699 list[i].available = status;
700 return &list[i];
701 }
702 return NULL;
703}
704
705static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
706 const void *data)
707{
708 return entry->desc.sadb_alg_id == (unsigned long)data;
709}
710
711struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
712{
713 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
714 (void *)(unsigned long)alg_id, 1);
715}
716EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
717
718struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
719{
720 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
721 (void *)(unsigned long)alg_id, 1);
722}
723EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
724
725struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
726{
727 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
728 (void *)(unsigned long)alg_id, 1);
729}
730EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
731
732static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
733 const void *data)
734{
735 const char *name = data;
736
737 return name && (!strcmp(name, entry->name) ||
738 (entry->compat && !strcmp(name, entry->compat)));
739}
740
741struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
742{
743 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
744 probe);
745}
746EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
747
748struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
749{
750 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
751 probe);
752}
753EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
754
755struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
756{
757 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
758 probe);
759}
760EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
761
762struct xfrm_aead_name {
763 const char *name;
764 int icvbits;
765};
766
767static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
768 const void *data)
769{
770 const struct xfrm_aead_name *aead = data;
771 const char *name = aead->name;
772
773 return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
774 !strcmp(name, entry->name);
775}
776
777struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe)
778{
779 struct xfrm_aead_name data = {
780 .name = name,
781 .icvbits = icv_len,
782 };
783
784 return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
785 probe);
786}
787EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
788
789struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
790{
791 if (idx >= aalg_entries())
792 return NULL;
793
794 return &aalg_list[idx];
795}
796EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
797
798struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
799{
800 if (idx >= ealg_entries())
801 return NULL;
802
803 return &ealg_list[idx];
804}
805EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);
806
807/*
808 * Probe for the availability of crypto algorithms, and set the available
809 * flag for any algorithms found on the system. This is typically called by
810 * pfkey during userspace SA add, update or register.
811 */
812void xfrm_probe_algs(void)
813{
814 int i, status;
815
816 BUG_ON(in_softirq());
817
818 for (i = 0; i < aalg_entries(); i++) {
819 status = crypto_has_ahash(aalg_list[i].name, 0, 0);
820 if (aalg_list[i].available != status)
821 aalg_list[i].available = status;
822 }
823
824 for (i = 0; i < ealg_entries(); i++) {
825 status = crypto_has_skcipher(ealg_list[i].name, 0, 0);
826 if (ealg_list[i].available != status)
827 ealg_list[i].available = status;
828 }
829
830 for (i = 0; i < calg_entries(); i++) {
831 status = crypto_has_comp(calg_list[i].name, 0,
832 CRYPTO_ALG_ASYNC);
833 if (calg_list[i].available != status)
834 calg_list[i].available = status;
835 }
836}
837EXPORT_SYMBOL_GPL(xfrm_probe_algs);
838
839int xfrm_count_pfkey_auth_supported(void)
840{
841 int i, n;
842
843 for (i = 0, n = 0; i < aalg_entries(); i++)
844 if (aalg_list[i].available && aalg_list[i].pfkey_supported)
845 n++;
846 return n;
847}
848EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);
849
850int xfrm_count_pfkey_enc_supported(void)
851{
852 int i, n;
853
854 for (i = 0, n = 0; i < ealg_entries(); i++)
855 if (ealg_list[i].available && ealg_list[i].pfkey_supported)
856 n++;
857 return n;
858}
859EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);
860
861MODULE_DESCRIPTION("XFRM Algorithm interface");
862MODULE_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_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)
19#include <net/esp.h>
20#endif
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 */
28static struct xfrm_algo_desc aead_list[] = {
29{
30 .name = "rfc4106(gcm(aes))",
31
32 .uinfo = {
33 .aead = {
34 .icv_truncbits = 64,
35 }
36 },
37
38 .desc = {
39 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
40 .sadb_alg_ivlen = 8,
41 .sadb_alg_minbits = 128,
42 .sadb_alg_maxbits = 256
43 }
44},
45{
46 .name = "rfc4106(gcm(aes))",
47
48 .uinfo = {
49 .aead = {
50 .icv_truncbits = 96,
51 }
52 },
53
54 .desc = {
55 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
56 .sadb_alg_ivlen = 8,
57 .sadb_alg_minbits = 128,
58 .sadb_alg_maxbits = 256
59 }
60},
61{
62 .name = "rfc4106(gcm(aes))",
63
64 .uinfo = {
65 .aead = {
66 .icv_truncbits = 128,
67 }
68 },
69
70 .desc = {
71 .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
72 .sadb_alg_ivlen = 8,
73 .sadb_alg_minbits = 128,
74 .sadb_alg_maxbits = 256
75 }
76},
77{
78 .name = "rfc4309(ccm(aes))",
79
80 .uinfo = {
81 .aead = {
82 .icv_truncbits = 64,
83 }
84 },
85
86 .desc = {
87 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
88 .sadb_alg_ivlen = 8,
89 .sadb_alg_minbits = 128,
90 .sadb_alg_maxbits = 256
91 }
92},
93{
94 .name = "rfc4309(ccm(aes))",
95
96 .uinfo = {
97 .aead = {
98 .icv_truncbits = 96,
99 }
100 },
101
102 .desc = {
103 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
104 .sadb_alg_ivlen = 8,
105 .sadb_alg_minbits = 128,
106 .sadb_alg_maxbits = 256
107 }
108},
109{
110 .name = "rfc4309(ccm(aes))",
111
112 .uinfo = {
113 .aead = {
114 .icv_truncbits = 128,
115 }
116 },
117
118 .desc = {
119 .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
120 .sadb_alg_ivlen = 8,
121 .sadb_alg_minbits = 128,
122 .sadb_alg_maxbits = 256
123 }
124},
125{
126 .name = "rfc4543(gcm(aes))",
127
128 .uinfo = {
129 .aead = {
130 .icv_truncbits = 128,
131 }
132 },
133
134 .desc = {
135 .sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
136 .sadb_alg_ivlen = 8,
137 .sadb_alg_minbits = 128,
138 .sadb_alg_maxbits = 256
139 }
140},
141};
142
143static struct xfrm_algo_desc aalg_list[] = {
144{
145 .name = "digest_null",
146
147 .uinfo = {
148 .auth = {
149 .icv_truncbits = 0,
150 .icv_fullbits = 0,
151 }
152 },
153
154 .desc = {
155 .sadb_alg_id = SADB_X_AALG_NULL,
156 .sadb_alg_ivlen = 0,
157 .sadb_alg_minbits = 0,
158 .sadb_alg_maxbits = 0
159 }
160},
161{
162 .name = "hmac(md5)",
163 .compat = "md5",
164
165 .uinfo = {
166 .auth = {
167 .icv_truncbits = 96,
168 .icv_fullbits = 128,
169 }
170 },
171
172 .desc = {
173 .sadb_alg_id = SADB_AALG_MD5HMAC,
174 .sadb_alg_ivlen = 0,
175 .sadb_alg_minbits = 128,
176 .sadb_alg_maxbits = 128
177 }
178},
179{
180 .name = "hmac(sha1)",
181 .compat = "sha1",
182
183 .uinfo = {
184 .auth = {
185 .icv_truncbits = 96,
186 .icv_fullbits = 160,
187 }
188 },
189
190 .desc = {
191 .sadb_alg_id = SADB_AALG_SHA1HMAC,
192 .sadb_alg_ivlen = 0,
193 .sadb_alg_minbits = 160,
194 .sadb_alg_maxbits = 160
195 }
196},
197{
198 .name = "hmac(sha256)",
199 .compat = "sha256",
200
201 .uinfo = {
202 .auth = {
203 .icv_truncbits = 96,
204 .icv_fullbits = 256,
205 }
206 },
207
208 .desc = {
209 .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
210 .sadb_alg_ivlen = 0,
211 .sadb_alg_minbits = 256,
212 .sadb_alg_maxbits = 256
213 }
214},
215{
216 .name = "hmac(sha384)",
217
218 .uinfo = {
219 .auth = {
220 .icv_truncbits = 192,
221 .icv_fullbits = 384,
222 }
223 },
224
225 .desc = {
226 .sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
227 .sadb_alg_ivlen = 0,
228 .sadb_alg_minbits = 384,
229 .sadb_alg_maxbits = 384
230 }
231},
232{
233 .name = "hmac(sha512)",
234
235 .uinfo = {
236 .auth = {
237 .icv_truncbits = 256,
238 .icv_fullbits = 512,
239 }
240 },
241
242 .desc = {
243 .sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
244 .sadb_alg_ivlen = 0,
245 .sadb_alg_minbits = 512,
246 .sadb_alg_maxbits = 512
247 }
248},
249{
250 .name = "hmac(rmd160)",
251 .compat = "rmd160",
252
253 .uinfo = {
254 .auth = {
255 .icv_truncbits = 96,
256 .icv_fullbits = 160,
257 }
258 },
259
260 .desc = {
261 .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
262 .sadb_alg_ivlen = 0,
263 .sadb_alg_minbits = 160,
264 .sadb_alg_maxbits = 160
265 }
266},
267{
268 .name = "xcbc(aes)",
269
270 .uinfo = {
271 .auth = {
272 .icv_truncbits = 96,
273 .icv_fullbits = 128,
274 }
275 },
276
277 .desc = {
278 .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
279 .sadb_alg_ivlen = 0,
280 .sadb_alg_minbits = 128,
281 .sadb_alg_maxbits = 128
282 }
283},
284};
285
286static struct xfrm_algo_desc ealg_list[] = {
287{
288 .name = "ecb(cipher_null)",
289 .compat = "cipher_null",
290
291 .uinfo = {
292 .encr = {
293 .blockbits = 8,
294 .defkeybits = 0,
295 }
296 },
297
298 .desc = {
299 .sadb_alg_id = SADB_EALG_NULL,
300 .sadb_alg_ivlen = 0,
301 .sadb_alg_minbits = 0,
302 .sadb_alg_maxbits = 0
303 }
304},
305{
306 .name = "cbc(des)",
307 .compat = "des",
308
309 .uinfo = {
310 .encr = {
311 .blockbits = 64,
312 .defkeybits = 64,
313 }
314 },
315
316 .desc = {
317 .sadb_alg_id = SADB_EALG_DESCBC,
318 .sadb_alg_ivlen = 8,
319 .sadb_alg_minbits = 64,
320 .sadb_alg_maxbits = 64
321 }
322},
323{
324 .name = "cbc(des3_ede)",
325 .compat = "des3_ede",
326
327 .uinfo = {
328 .encr = {
329 .blockbits = 64,
330 .defkeybits = 192,
331 }
332 },
333
334 .desc = {
335 .sadb_alg_id = SADB_EALG_3DESCBC,
336 .sadb_alg_ivlen = 8,
337 .sadb_alg_minbits = 192,
338 .sadb_alg_maxbits = 192
339 }
340},
341{
342 .name = "cbc(cast5)",
343 .compat = "cast5",
344
345 .uinfo = {
346 .encr = {
347 .blockbits = 64,
348 .defkeybits = 128,
349 }
350 },
351
352 .desc = {
353 .sadb_alg_id = SADB_X_EALG_CASTCBC,
354 .sadb_alg_ivlen = 8,
355 .sadb_alg_minbits = 40,
356 .sadb_alg_maxbits = 128
357 }
358},
359{
360 .name = "cbc(blowfish)",
361 .compat = "blowfish",
362
363 .uinfo = {
364 .encr = {
365 .blockbits = 64,
366 .defkeybits = 128,
367 }
368 },
369
370 .desc = {
371 .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
372 .sadb_alg_ivlen = 8,
373 .sadb_alg_minbits = 40,
374 .sadb_alg_maxbits = 448
375 }
376},
377{
378 .name = "cbc(aes)",
379 .compat = "aes",
380
381 .uinfo = {
382 .encr = {
383 .blockbits = 128,
384 .defkeybits = 128,
385 }
386 },
387
388 .desc = {
389 .sadb_alg_id = SADB_X_EALG_AESCBC,
390 .sadb_alg_ivlen = 8,
391 .sadb_alg_minbits = 128,
392 .sadb_alg_maxbits = 256
393 }
394},
395{
396 .name = "cbc(serpent)",
397 .compat = "serpent",
398
399 .uinfo = {
400 .encr = {
401 .blockbits = 128,
402 .defkeybits = 128,
403 }
404 },
405
406 .desc = {
407 .sadb_alg_id = SADB_X_EALG_SERPENTCBC,
408 .sadb_alg_ivlen = 8,
409 .sadb_alg_minbits = 128,
410 .sadb_alg_maxbits = 256,
411 }
412},
413{
414 .name = "cbc(camellia)",
415 .compat = "camellia",
416
417 .uinfo = {
418 .encr = {
419 .blockbits = 128,
420 .defkeybits = 128,
421 }
422 },
423
424 .desc = {
425 .sadb_alg_id = SADB_X_EALG_CAMELLIACBC,
426 .sadb_alg_ivlen = 8,
427 .sadb_alg_minbits = 128,
428 .sadb_alg_maxbits = 256
429 }
430},
431{
432 .name = "cbc(twofish)",
433 .compat = "twofish",
434
435 .uinfo = {
436 .encr = {
437 .blockbits = 128,
438 .defkeybits = 128,
439 }
440 },
441
442 .desc = {
443 .sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
444 .sadb_alg_ivlen = 8,
445 .sadb_alg_minbits = 128,
446 .sadb_alg_maxbits = 256
447 }
448},
449{
450 .name = "rfc3686(ctr(aes))",
451
452 .uinfo = {
453 .encr = {
454 .blockbits = 128,
455 .defkeybits = 160, /* 128-bit key + 32-bit nonce */
456 }
457 },
458
459 .desc = {
460 .sadb_alg_id = SADB_X_EALG_AESCTR,
461 .sadb_alg_ivlen = 8,
462 .sadb_alg_minbits = 160,
463 .sadb_alg_maxbits = 288
464 }
465},
466};
467
468static struct xfrm_algo_desc calg_list[] = {
469{
470 .name = "deflate",
471 .uinfo = {
472 .comp = {
473 .threshold = 90,
474 }
475 },
476 .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
477},
478{
479 .name = "lzs",
480 .uinfo = {
481 .comp = {
482 .threshold = 90,
483 }
484 },
485 .desc = { .sadb_alg_id = SADB_X_CALG_LZS }
486},
487{
488 .name = "lzjh",
489 .uinfo = {
490 .comp = {
491 .threshold = 50,
492 }
493 },
494 .desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
495},
496};
497
498static inline int aead_entries(void)
499{
500 return ARRAY_SIZE(aead_list);
501}
502
503static inline int aalg_entries(void)
504{
505 return ARRAY_SIZE(aalg_list);
506}
507
508static inline int ealg_entries(void)
509{
510 return ARRAY_SIZE(ealg_list);
511}
512
513static inline int calg_entries(void)
514{
515 return ARRAY_SIZE(calg_list);
516}
517
518struct xfrm_algo_list {
519 struct xfrm_algo_desc *algs;
520 int entries;
521 u32 type;
522 u32 mask;
523};
524
525static const struct xfrm_algo_list xfrm_aead_list = {
526 .algs = aead_list,
527 .entries = ARRAY_SIZE(aead_list),
528 .type = CRYPTO_ALG_TYPE_AEAD,
529 .mask = CRYPTO_ALG_TYPE_MASK,
530};
531
532static const struct xfrm_algo_list xfrm_aalg_list = {
533 .algs = aalg_list,
534 .entries = ARRAY_SIZE(aalg_list),
535 .type = CRYPTO_ALG_TYPE_HASH,
536 .mask = CRYPTO_ALG_TYPE_HASH_MASK,
537};
538
539static const struct xfrm_algo_list xfrm_ealg_list = {
540 .algs = ealg_list,
541 .entries = ARRAY_SIZE(ealg_list),
542 .type = CRYPTO_ALG_TYPE_BLKCIPHER,
543 .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
544};
545
546static const struct xfrm_algo_list xfrm_calg_list = {
547 .algs = calg_list,
548 .entries = ARRAY_SIZE(calg_list),
549 .type = CRYPTO_ALG_TYPE_COMPRESS,
550 .mask = CRYPTO_ALG_TYPE_MASK,
551};
552
553static struct xfrm_algo_desc *xfrm_find_algo(
554 const struct xfrm_algo_list *algo_list,
555 int match(const struct xfrm_algo_desc *entry, const void *data),
556 const void *data, int probe)
557{
558 struct xfrm_algo_desc *list = algo_list->algs;
559 int i, status;
560
561 for (i = 0; i < algo_list->entries; i++) {
562 if (!match(list + i, data))
563 continue;
564
565 if (list[i].available)
566 return &list[i];
567
568 if (!probe)
569 break;
570
571 status = crypto_has_alg(list[i].name, algo_list->type,
572 algo_list->mask);
573 if (!status)
574 break;
575
576 list[i].available = status;
577 return &list[i];
578 }
579 return NULL;
580}
581
582static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
583 const void *data)
584{
585 return entry->desc.sadb_alg_id == (unsigned long)data;
586}
587
588struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
589{
590 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
591 (void *)(unsigned long)alg_id, 1);
592}
593EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
594
595struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
596{
597 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
598 (void *)(unsigned long)alg_id, 1);
599}
600EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
601
602struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
603{
604 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
605 (void *)(unsigned long)alg_id, 1);
606}
607EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
608
609static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
610 const void *data)
611{
612 const char *name = data;
613
614 return name && (!strcmp(name, entry->name) ||
615 (entry->compat && !strcmp(name, entry->compat)));
616}
617
618struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
619{
620 return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
621 probe);
622}
623EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
624
625struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
626{
627 return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
628 probe);
629}
630EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
631
632struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
633{
634 return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
635 probe);
636}
637EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
638
639struct xfrm_aead_name {
640 const char *name;
641 int icvbits;
642};
643
644static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
645 const void *data)
646{
647 const struct xfrm_aead_name *aead = data;
648 const char *name = aead->name;
649
650 return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
651 !strcmp(name, entry->name);
652}
653
654struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe)
655{
656 struct xfrm_aead_name data = {
657 .name = name,
658 .icvbits = icv_len,
659 };
660
661 return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
662 probe);
663}
664EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
665
666struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
667{
668 if (idx >= aalg_entries())
669 return NULL;
670
671 return &aalg_list[idx];
672}
673EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
674
675struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
676{
677 if (idx >= ealg_entries())
678 return NULL;
679
680 return &ealg_list[idx];
681}
682EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);
683
684/*
685 * Probe for the availability of crypto algorithms, and set the available
686 * flag for any algorithms found on the system. This is typically called by
687 * pfkey during userspace SA add, update or register.
688 */
689void xfrm_probe_algs(void)
690{
691 int i, status;
692
693 BUG_ON(in_softirq());
694
695 for (i = 0; i < aalg_entries(); i++) {
696 status = crypto_has_hash(aalg_list[i].name, 0,
697 CRYPTO_ALG_ASYNC);
698 if (aalg_list[i].available != status)
699 aalg_list[i].available = status;
700 }
701
702 for (i = 0; i < ealg_entries(); i++) {
703 status = crypto_has_blkcipher(ealg_list[i].name, 0,
704 CRYPTO_ALG_ASYNC);
705 if (ealg_list[i].available != status)
706 ealg_list[i].available = status;
707 }
708
709 for (i = 0; i < calg_entries(); i++) {
710 status = crypto_has_comp(calg_list[i].name, 0,
711 CRYPTO_ALG_ASYNC);
712 if (calg_list[i].available != status)
713 calg_list[i].available = status;
714 }
715}
716EXPORT_SYMBOL_GPL(xfrm_probe_algs);
717
718int xfrm_count_auth_supported(void)
719{
720 int i, n;
721
722 for (i = 0, n = 0; i < aalg_entries(); i++)
723 if (aalg_list[i].available)
724 n++;
725 return n;
726}
727EXPORT_SYMBOL_GPL(xfrm_count_auth_supported);
728
729int xfrm_count_enc_supported(void)
730{
731 int i, n;
732
733 for (i = 0, n = 0; i < ealg_entries(); i++)
734 if (ealg_list[i].available)
735 n++;
736 return n;
737}
738EXPORT_SYMBOL_GPL(xfrm_count_enc_supported);
739
740#if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)
741
742void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len)
743{
744 if (tail != skb) {
745 skb->data_len += len;
746 skb->len += len;
747 }
748 return skb_put(tail, len);
749}
750EXPORT_SYMBOL_GPL(pskb_put);
751#endif
752
753MODULE_LICENSE("GPL");