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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");
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 defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)
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");