forked from rpm-software-management/rpm
-
Notifications
You must be signed in to change notification settings - Fork 0
/
rpmpgp.c
1439 lines (1260 loc) · 36.9 KB
/
rpmpgp.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/** \ingroup rpmio signature
* \file rpmio/rpmpgp.c
* Routines to handle RFC-2440 detached signatures.
*/
#include "system.h"
#include <time.h>
#include <netinet/in.h>
#include <rpm/rpmstring.h>
#include <rpm/rpmlog.h>
#include <rpm/rpmbase64.h>
#include "rpmio/digest.h"
#include "rpmio/rpmio_internal.h" /* XXX rpmioSlurp */
#include "debug.h"
static int _print = 0;
/** \ingroup rpmio
* Container for values parsed from an OpenPGP signature and public key.
*/
struct pgpDig_s {
struct pgpDigParams_s * signature;
struct pgpDigParams_s * pubkey;
};
typedef const struct pgpValTbl_s {
int val;
char const * const str;
} * pgpValTbl;
static struct pgpValTbl_s const pgpSigTypeTbl[] = {
{ PGPSIGTYPE_BINARY, "Binary document signature" },
{ PGPSIGTYPE_TEXT, "Text document signature" },
{ PGPSIGTYPE_STANDALONE, "Standalone signature" },
{ PGPSIGTYPE_GENERIC_CERT, "Generic certification of a User ID and Public Key" },
{ PGPSIGTYPE_PERSONA_CERT, "Persona certification of a User ID and Public Key" },
{ PGPSIGTYPE_CASUAL_CERT, "Casual certification of a User ID and Public Key" },
{ PGPSIGTYPE_POSITIVE_CERT, "Positive certification of a User ID and Public Key" },
{ PGPSIGTYPE_SUBKEY_BINDING,"Subkey Binding Signature" },
{ PGPSIGTYPE_SIGNED_KEY, "Signature directly on a key" },
{ PGPSIGTYPE_KEY_REVOKE, "Key revocation signature" },
{ PGPSIGTYPE_SUBKEY_REVOKE, "Subkey revocation signature" },
{ PGPSIGTYPE_CERT_REVOKE, "Certification revocation signature" },
{ PGPSIGTYPE_TIMESTAMP, "Timestamp signature" },
{ -1, "Unknown signature type" },
};
static struct pgpValTbl_s const pgpPubkeyTbl[] = {
{ PGPPUBKEYALGO_RSA, "RSA" },
{ PGPPUBKEYALGO_RSA_ENCRYPT,"RSA(Encrypt-Only)" },
{ PGPPUBKEYALGO_RSA_SIGN, "RSA(Sign-Only)" },
{ PGPPUBKEYALGO_ELGAMAL_ENCRYPT,"Elgamal(Encrypt-Only)" },
{ PGPPUBKEYALGO_DSA, "DSA" },
{ PGPPUBKEYALGO_EC, "Elliptic Curve" },
{ PGPPUBKEYALGO_ECDSA, "ECDSA" },
{ PGPPUBKEYALGO_ELGAMAL, "Elgamal" },
{ PGPPUBKEYALGO_DH, "Diffie-Hellman (X9.42)" },
{ PGPPUBKEYALGO_EDDSA, "EdDSA" },
{ -1, "Unknown public key algorithm" },
};
static struct pgpValTbl_s const pgpSymkeyTbl[] = {
{ PGPSYMKEYALGO_PLAINTEXT, "Plaintext" },
{ PGPSYMKEYALGO_IDEA, "IDEA" },
{ PGPSYMKEYALGO_TRIPLE_DES, "3DES" },
{ PGPSYMKEYALGO_CAST5, "CAST5" },
{ PGPSYMKEYALGO_BLOWFISH, "BLOWFISH" },
{ PGPSYMKEYALGO_SAFER, "SAFER" },
{ PGPSYMKEYALGO_DES_SK, "DES/SK" },
{ PGPSYMKEYALGO_AES_128, "AES(128-bit key)" },
{ PGPSYMKEYALGO_AES_192, "AES(192-bit key)" },
{ PGPSYMKEYALGO_AES_256, "AES(256-bit key)" },
{ PGPSYMKEYALGO_TWOFISH, "TWOFISH(256-bit key)" },
{ PGPSYMKEYALGO_NOENCRYPT, "no encryption" },
{ -1, "Unknown symmetric key algorithm" },
};
static struct pgpValTbl_s const pgpCompressionTbl[] = {
{ PGPCOMPRESSALGO_NONE, "Uncompressed" },
{ PGPCOMPRESSALGO_ZIP, "ZIP" },
{ PGPCOMPRESSALGO_ZLIB, "ZLIB" },
{ PGPCOMPRESSALGO_BZIP2, "BZIP2" },
{ -1, "Unknown compression algorithm" },
};
static struct pgpValTbl_s const pgpHashTbl[] = {
{ PGPHASHALGO_MD5, "MD5" },
{ PGPHASHALGO_SHA1, "SHA1" },
{ PGPHASHALGO_RIPEMD160, "RIPEMD160" },
{ PGPHASHALGO_MD2, "MD2" },
{ PGPHASHALGO_TIGER192, "TIGER192" },
{ PGPHASHALGO_HAVAL_5_160, "HAVAL-5-160" },
{ PGPHASHALGO_SHA256, "SHA256" },
{ PGPHASHALGO_SHA384, "SHA384" },
{ PGPHASHALGO_SHA512, "SHA512" },
{ PGPHASHALGO_SHA224, "SHA224" },
{ -1, "Unknown hash algorithm" },
};
static struct pgpValTbl_s const pgpKeyServerPrefsTbl[] = {
{ 0x80, "No-modify" },
{ -1, "Unknown key server preference" },
};
static struct pgpValTbl_s const pgpSubTypeTbl[] = {
{ PGPSUBTYPE_SIG_CREATE_TIME,"signature creation time" },
{ PGPSUBTYPE_SIG_EXPIRE_TIME,"signature expiration time" },
{ PGPSUBTYPE_EXPORTABLE_CERT,"exportable certification" },
{ PGPSUBTYPE_TRUST_SIG, "trust signature" },
{ PGPSUBTYPE_REGEX, "regular expression" },
{ PGPSUBTYPE_REVOCABLE, "revocable" },
{ PGPSUBTYPE_KEY_EXPIRE_TIME,"key expiration time" },
{ PGPSUBTYPE_ARR, "additional recipient request" },
{ PGPSUBTYPE_PREFER_SYMKEY, "preferred symmetric algorithms" },
{ PGPSUBTYPE_REVOKE_KEY, "revocation key" },
{ PGPSUBTYPE_ISSUER_KEYID, "issuer key ID" },
{ PGPSUBTYPE_NOTATION, "notation data" },
{ PGPSUBTYPE_PREFER_HASH, "preferred hash algorithms" },
{ PGPSUBTYPE_PREFER_COMPRESS,"preferred compression algorithms" },
{ PGPSUBTYPE_KEYSERVER_PREFERS,"key server preferences" },
{ PGPSUBTYPE_PREFER_KEYSERVER,"preferred key server" },
{ PGPSUBTYPE_PRIMARY_USERID,"primary user id" },
{ PGPSUBTYPE_POLICY_URL, "policy URL" },
{ PGPSUBTYPE_KEY_FLAGS, "key flags" },
{ PGPSUBTYPE_SIGNER_USERID, "signer's user id" },
{ PGPSUBTYPE_REVOKE_REASON, "reason for revocation" },
{ PGPSUBTYPE_FEATURES, "features" },
{ PGPSUBTYPE_EMBEDDED_SIG, "embedded signature" },
{ PGPSUBTYPE_INTERNAL_100, "internal subpkt type 100" },
{ PGPSUBTYPE_INTERNAL_101, "internal subpkt type 101" },
{ PGPSUBTYPE_INTERNAL_102, "internal subpkt type 102" },
{ PGPSUBTYPE_INTERNAL_103, "internal subpkt type 103" },
{ PGPSUBTYPE_INTERNAL_104, "internal subpkt type 104" },
{ PGPSUBTYPE_INTERNAL_105, "internal subpkt type 105" },
{ PGPSUBTYPE_INTERNAL_106, "internal subpkt type 106" },
{ PGPSUBTYPE_INTERNAL_107, "internal subpkt type 107" },
{ PGPSUBTYPE_INTERNAL_108, "internal subpkt type 108" },
{ PGPSUBTYPE_INTERNAL_109, "internal subpkt type 109" },
{ PGPSUBTYPE_INTERNAL_110, "internal subpkt type 110" },
{ -1, "Unknown signature subkey type" },
};
static struct pgpValTbl_s const pgpTagTbl[] = {
{ PGPTAG_PUBLIC_SESSION_KEY,"Public-Key Encrypted Session Key" },
{ PGPTAG_SIGNATURE, "Signature" },
{ PGPTAG_SYMMETRIC_SESSION_KEY,"Symmetric-Key Encrypted Session Key" },
{ PGPTAG_ONEPASS_SIGNATURE, "One-Pass Signature" },
{ PGPTAG_SECRET_KEY, "Secret Key" },
{ PGPTAG_PUBLIC_KEY, "Public Key" },
{ PGPTAG_SECRET_SUBKEY, "Secret Subkey" },
{ PGPTAG_COMPRESSED_DATA, "Compressed Data" },
{ PGPTAG_SYMMETRIC_DATA, "Symmetrically Encrypted Data" },
{ PGPTAG_MARKER, "Marker" },
{ PGPTAG_LITERAL_DATA, "Literal Data" },
{ PGPTAG_TRUST, "Trust" },
{ PGPTAG_USER_ID, "User ID" },
{ PGPTAG_PUBLIC_SUBKEY, "Public Subkey" },
{ PGPTAG_COMMENT_OLD, "Comment (from OpenPGP draft)" },
{ PGPTAG_PHOTOID, "PGP's photo ID" },
{ PGPTAG_ENCRYPTED_MDC, "Integrity protected encrypted data" },
{ PGPTAG_MDC, "Manipulaion detection code packet" },
{ PGPTAG_PRIVATE_60, "Private #60" },
{ PGPTAG_COMMENT, "Comment" },
{ PGPTAG_PRIVATE_62, "Private #62" },
{ PGPTAG_CONTROL, "Control (GPG)" },
{ -1, "Unknown packet tag" },
};
static struct pgpValTbl_s const pgpArmorTbl[] = {
{ PGPARMOR_MESSAGE, "MESSAGE" },
{ PGPARMOR_PUBKEY, "PUBLIC KEY BLOCK" },
{ PGPARMOR_SIGNATURE, "SIGNATURE" },
{ PGPARMOR_SIGNED_MESSAGE, "SIGNED MESSAGE" },
{ PGPARMOR_FILE, "ARMORED FILE" },
{ PGPARMOR_PRIVKEY, "PRIVATE KEY BLOCK" },
{ PGPARMOR_SECKEY, "SECRET KEY BLOCK" },
{ -1, "Unknown armor block" }
};
static struct pgpValTbl_s const pgpArmorKeyTbl[] = {
{ PGPARMORKEY_VERSION, "Version: " },
{ PGPARMORKEY_COMMENT, "Comment: " },
{ PGPARMORKEY_MESSAGEID, "MessageID: " },
{ PGPARMORKEY_HASH, "Hash: " },
{ PGPARMORKEY_CHARSET, "Charset: " },
{ -1, "Unknown armor key" }
};
static void pgpPrtNL(void)
{
if (!_print) return;
fprintf(stderr, "\n");
}
static const char * pgpValStr(pgpValTbl vs, uint8_t val)
{
do {
if (vs->val == val)
break;
} while ((++vs)->val != -1);
return vs->str;
}
static pgpValTbl pgpValTable(pgpValType type)
{
switch (type) {
case PGPVAL_TAG: return pgpTagTbl;
case PGPVAL_ARMORBLOCK: return pgpArmorTbl;
case PGPVAL_ARMORKEY: return pgpArmorKeyTbl;
case PGPVAL_SIGTYPE: return pgpSigTypeTbl;
case PGPVAL_SUBTYPE: return pgpSubTypeTbl;
case PGPVAL_PUBKEYALGO: return pgpPubkeyTbl;
case PGPVAL_SYMKEYALGO: return pgpSymkeyTbl;
case PGPVAL_COMPRESSALGO: return pgpCompressionTbl;
case PGPVAL_HASHALGO: return pgpHashTbl;
case PGPVAL_SERVERPREFS: return pgpKeyServerPrefsTbl;
default:
break;
}
return NULL;
}
const char * pgpValString(pgpValType type, uint8_t val)
{
pgpValTbl tbl = pgpValTable(type);
return (tbl != NULL) ? pgpValStr(tbl, val) : NULL;
}
static void pgpPrtHex(const char *pre, const uint8_t *p, size_t plen)
{
char *hex = NULL;
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
hex = pgpHexStr(p, plen);
fprintf(stderr, " %s", hex);
free(hex);
}
static void pgpPrtVal(const char * pre, pgpValTbl vs, uint8_t val)
{
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
fprintf(stderr, "%s(%u)", pgpValStr(vs, val), (unsigned)val);
}
static void pgpPrtTime(const char * pre, const uint8_t *p, size_t plen)
{
if (!_print) return;
if (pre && *pre)
fprintf(stderr, "%s", pre);
if (plen == 4) {
char buf[1024];
time_t t = pgpGrab(p, plen);
struct tm _tm, *tms = localtime_r(&t, &_tm);
if (strftime(buf, sizeof(buf), "%c", tms) > 0)
fprintf(stderr, " %-24.24s(0x%08x)", buf, (unsigned)t);
} else {
pgpPrtHex("", p+1, plen-1);
}
}
/** \ingroup rpmpgp
* Return value of an OpenPGP string.
* @param vs table of (string,value) pairs
* @param s string token to lookup
* @param se end-of-string address
* @return byte value
*/
static inline
int pgpValTok(pgpValTbl vs, const char * s, const char * se)
{
do {
size_t vlen = strlen(vs->str);
if (vlen <= (se-s) && rstreqn(s, vs->str, vlen))
break;
} while ((++vs)->val != -1);
return vs->val;
}
/** \ingroup rpmpgp
* Decode length from 1, 2, or 5 octet body length encoding, used in
* new format packet headers and V4 signature subpackets.
* Partial body lengths are (intentionally) not supported.
* @param s pointer to length encoding buffer
* @param slen buffer size
* @param[out] *lenp decoded length
* @return no. of bytes used to encode the length, 0 on error
*/
static inline
size_t pgpLen(const uint8_t *s, size_t slen, size_t * lenp)
{
size_t dlen = 0;
size_t lenlen = 0;
/*
* Callers can only ensure we'll always have the first byte, beyond
* that the required size is not known until we decode it so we need
* to check if we have enough bytes to read the size as we go.
*/
if (*s < 192) {
lenlen = 1;
dlen = *s;
} else if (*s < 224 && slen > 2) {
lenlen = 2;
dlen = (((s[0]) - 192) << 8) + s[1] + 192;
} else if (*s == 255 && slen > 5) {
lenlen = 5;
dlen = pgpGrab(s+1, 4);
}
if (slen - lenlen < dlen)
lenlen = 0;
if (lenlen)
*lenp = dlen;
return lenlen;
}
struct pgpPkt {
uint8_t tag; /* decoded PGP tag */
const uint8_t *head; /* pointer to start of packet (header) */
const uint8_t *body; /* pointer to packet body */
size_t blen; /* length of body in bytes */
};
static int decodePkt(const uint8_t *p, size_t plen, struct pgpPkt *pkt)
{
int rc = -1; /* assume failure */
/* Valid PGP packet header must always have two or more bytes in it */
if (p && plen >= 2 && p[0] & 0x80) {
size_t lenlen = 0;
size_t hlen = 0;
if (p[0] & 0x40) {
/* New format packet, body length encoding in second byte */
lenlen = pgpLen(p+1, plen-1, &pkt->blen);
pkt->tag = (p[0] & 0x3f);
} else {
/* Old format packet, body length encoding in tag byte */
lenlen = (1 << (p[0] & 0x3));
if (plen > lenlen) {
pkt->blen = pgpGrab(p+1, lenlen);
}
pkt->tag = (p[0] >> 2) & 0xf;
}
hlen = lenlen + 1;
/* Does the packet header and its body fit in our boundaries? */
if (lenlen && (hlen + pkt->blen <= plen)) {
pkt->head = p;
pkt->body = pkt->head + hlen;
rc = 0;
}
}
return rc;
}
#define CRC24_INIT 0xb704ce
#define CRC24_POLY 0x1864cfb
/** \ingroup rpmpgp
* Return CRC of a buffer.
* @param octets bytes
* @param len no. of bytes
* @return crc of buffer
*/
static inline
unsigned int pgpCRC(const uint8_t *octets, size_t len)
{
unsigned int crc = CRC24_INIT;
size_t i;
while (len--) {
crc ^= (*octets++) << 16;
for (i = 0; i < 8; i++) {
crc <<= 1;
if (crc & 0x1000000)
crc ^= CRC24_POLY;
}
}
return crc & 0xffffff;
}
static int pgpVersion(const uint8_t *h, size_t hlen, uint8_t *version)
{
if (hlen < 1)
return -1;
*version = h[0];
return 0;
}
static int pgpPrtSubType(const uint8_t *h, size_t hlen, pgpSigType sigtype,
pgpDigParams _digp)
{
const uint8_t *p = h;
size_t plen = 0, i;
int rc = 0;
while (hlen > 0 && rc == 0) {
int impl = 0;
i = pgpLen(p, hlen, &plen);
if (i == 0 || plen < 1 || i + plen > hlen)
break;
p += i;
hlen -= i;
pgpPrtVal(" ", pgpSubTypeTbl, (p[0]&(~PGPSUBTYPE_CRITICAL)));
if (p[0] & PGPSUBTYPE_CRITICAL)
if (_print)
fprintf(stderr, " *CRITICAL*");
switch (*p) {
case PGPSUBTYPE_PREFER_SYMKEY: /* preferred symmetric algorithms */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpSymkeyTbl, p[i]);
break;
case PGPSUBTYPE_PREFER_HASH: /* preferred hash algorithms */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpHashTbl, p[i]);
break;
case PGPSUBTYPE_PREFER_COMPRESS:/* preferred compression algorithms */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpCompressionTbl, p[i]);
break;
case PGPSUBTYPE_KEYSERVER_PREFERS:/* key server preferences */
for (i = 1; i < plen; i++)
pgpPrtVal(" ", pgpKeyServerPrefsTbl, p[i]);
break;
case PGPSUBTYPE_SIG_CREATE_TIME:
impl = *p;
if (!(_digp->saved & PGPDIG_SAVED_TIME) &&
(sigtype == PGPSIGTYPE_POSITIVE_CERT || sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT || sigtype == PGPSIGTYPE_STANDALONE))
{
if (plen-1 != sizeof(_digp->time))
break;
_digp->saved |= PGPDIG_SAVED_TIME;
_digp->time = pgpGrab(p+1, sizeof(_digp->time));
}
case PGPSUBTYPE_SIG_EXPIRE_TIME:
case PGPSUBTYPE_KEY_EXPIRE_TIME:
pgpPrtTime(" ", p+1, plen-1);
break;
case PGPSUBTYPE_ISSUER_KEYID: /* issuer key ID */
impl = *p;
if (!(_digp->saved & PGPDIG_SAVED_ID) &&
(sigtype == PGPSIGTYPE_POSITIVE_CERT || sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT || sigtype == PGPSIGTYPE_STANDALONE))
{
if (plen-1 != sizeof(_digp->signid))
break;
_digp->saved |= PGPDIG_SAVED_ID;
memcpy(_digp->signid, p+1, sizeof(_digp->signid));
}
case PGPSUBTYPE_EXPORTABLE_CERT:
case PGPSUBTYPE_TRUST_SIG:
case PGPSUBTYPE_REGEX:
case PGPSUBTYPE_REVOCABLE:
case PGPSUBTYPE_ARR:
case PGPSUBTYPE_REVOKE_KEY:
case PGPSUBTYPE_NOTATION:
case PGPSUBTYPE_PREFER_KEYSERVER:
case PGPSUBTYPE_PRIMARY_USERID:
case PGPSUBTYPE_POLICY_URL:
case PGPSUBTYPE_KEY_FLAGS:
case PGPSUBTYPE_SIGNER_USERID:
case PGPSUBTYPE_REVOKE_REASON:
case PGPSUBTYPE_FEATURES:
case PGPSUBTYPE_EMBEDDED_SIG:
case PGPSUBTYPE_INTERNAL_100:
case PGPSUBTYPE_INTERNAL_101:
case PGPSUBTYPE_INTERNAL_102:
case PGPSUBTYPE_INTERNAL_103:
case PGPSUBTYPE_INTERNAL_104:
case PGPSUBTYPE_INTERNAL_105:
case PGPSUBTYPE_INTERNAL_106:
case PGPSUBTYPE_INTERNAL_107:
case PGPSUBTYPE_INTERNAL_108:
case PGPSUBTYPE_INTERNAL_109:
case PGPSUBTYPE_INTERNAL_110:
default:
pgpPrtHex("", p+1, plen-1);
break;
}
pgpPrtNL();
if (!impl && (p[0] & PGPSUBTYPE_CRITICAL))
rc = 1;
p += plen;
hlen -= plen;
}
if (hlen != 0)
rc = 1;
return rc;
}
pgpDigAlg pgpDigAlgFree(pgpDigAlg alg)
{
if (alg) {
if (alg->free)
alg->free(alg);
free(alg);
}
return NULL;
}
static int pgpPrtSigParams(pgpTag tag, uint8_t pubkey_algo, uint8_t sigtype,
const uint8_t *p, const uint8_t *h, size_t hlen,
pgpDigParams sigp)
{
int rc = 1; /* assume failure */
const uint8_t * pend = h + hlen;
int i;
pgpDigAlg sigalg = pgpSignatureNew(pubkey_algo);
for (i = 0; i < sigalg->mpis && p + 2 <= pend; i++) {
int mpil = pgpMpiLen(p);
if (p + mpil > pend)
break;
if (sigtype == PGPSIGTYPE_BINARY || sigtype == PGPSIGTYPE_TEXT) {
if (sigalg->setmpi(sigalg, i, p))
break;
}
p += mpil;
}
/* Does the size and number of MPI's match our expectations? */
if (p == pend && i == sigalg->mpis)
rc = 0;
/* We can't handle more than one sig at a time */
if (rc == 0 && sigp->alg == NULL && sigp->tag == PGPTAG_SIGNATURE)
sigp->alg = sigalg;
else
pgpDigAlgFree(sigalg);
return rc;
}
static int pgpGet(const uint8_t *s, size_t nbytes, const uint8_t *send,
unsigned int *valp)
{
int rc = -1;
if (s + nbytes <= send) {
*valp = pgpGrab(s, nbytes);
rc = 0;
}
return rc;
}
static int pgpPrtSig(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDigParams _digp)
{
uint8_t version = 0;
const uint8_t * p;
unsigned int plen;
int rc = 1;
if (pgpVersion(h, hlen, &version))
return rc;
switch (version) {
case 3:
{ pgpPktSigV3 v = (pgpPktSigV3)h;
if (hlen <= sizeof(*v) || v->hashlen != 5)
return 1;
pgpPrtVal("V3 ", pgpTagTbl, tag);
pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
pgpPrtVal(" ", pgpHashTbl, v->hash_algo);
pgpPrtVal(" ", pgpSigTypeTbl, v->sigtype);
pgpPrtNL();
pgpPrtTime(" ", v->time, sizeof(v->time));
pgpPrtNL();
pgpPrtHex(" signer keyid", v->signid, sizeof(v->signid));
plen = pgpGrab(v->signhash16, sizeof(v->signhash16));
pgpPrtHex(" signhash16", v->signhash16, sizeof(v->signhash16));
pgpPrtNL();
if (_digp->pubkey_algo == 0) {
_digp->version = v->version;
_digp->hashlen = v->hashlen;
_digp->sigtype = v->sigtype;
_digp->hash = memcpy(xmalloc(v->hashlen), &v->sigtype, v->hashlen);
_digp->time = pgpGrab(v->time, sizeof(v->time));
memcpy(_digp->signid, v->signid, sizeof(_digp->signid));
_digp->pubkey_algo = v->pubkey_algo;
_digp->hash_algo = v->hash_algo;
memcpy(_digp->signhash16, v->signhash16, sizeof(_digp->signhash16));
}
p = ((uint8_t *)v) + sizeof(*v);
rc = pgpPrtSigParams(tag, v->pubkey_algo, v->sigtype, p, h, hlen, _digp);
} break;
case 4:
{ pgpPktSigV4 v = (pgpPktSigV4)h;
if (hlen <= sizeof(*v))
return 1;
pgpPrtVal("V4 ", pgpTagTbl, tag);
pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
pgpPrtVal(" ", pgpHashTbl, v->hash_algo);
pgpPrtVal(" ", pgpSigTypeTbl, v->sigtype);
pgpPrtNL();
p = &v->hashlen[0];
if (pgpGet(v->hashlen, sizeof(v->hashlen), h + hlen, &plen))
return 1;
p += sizeof(v->hashlen);
if ((p + plen) > (h + hlen))
return 1;
if (_digp->pubkey_algo == 0) {
_digp->hashlen = sizeof(*v) + plen;
_digp->hash = memcpy(xmalloc(_digp->hashlen), v, _digp->hashlen);
}
if (pgpPrtSubType(p, plen, v->sigtype, _digp))
return 1;
p += plen;
if (pgpGet(p, 2, h + hlen, &plen))
return 1;
p += 2;
if ((p + plen) > (h + hlen))
return 1;
if (pgpPrtSubType(p, plen, v->sigtype, _digp))
return 1;
p += plen;
if (pgpGet(p, 2, h + hlen, &plen))
return 1;
pgpPrtHex(" signhash16", p, 2);
pgpPrtNL();
if (_digp->pubkey_algo == 0) {
_digp->version = v->version;
_digp->sigtype = v->sigtype;
_digp->pubkey_algo = v->pubkey_algo;
_digp->hash_algo = v->hash_algo;
memcpy(_digp->signhash16, p, sizeof(_digp->signhash16));
}
p += 2;
if (p > (h + hlen))
return 1;
rc = pgpPrtSigParams(tag, v->pubkey_algo, v->sigtype, p, h, hlen, _digp);
} break;
default:
rpmlog(RPMLOG_WARNING, _("Unsupported version of signature: V%d\n"), version);
rc = 1;
break;
}
return rc;
}
char * pgpHexStr(const uint8_t *p, size_t plen)
{
char *t, *str;
str = t = xmalloc(plen * 2 + 1);
static char const hex[] = "0123456789abcdef";
while (plen-- > 0) {
size_t i;
i = *p++;
*t++ = hex[ (i >> 4) & 0xf ];
*t++ = hex[ (i ) & 0xf ];
}
*t = '\0';
return str;
}
static uint8_t curve_oids[] = {
PGPCURVE_NIST_P_256, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07,
PGPCURVE_NIST_P_384, 0x05, 0x2b, 0x81, 0x04, 0x00, 0x22,
PGPCURVE_NIST_P_521, 0x05, 0x2b, 0x81, 0x04, 0x00, 0x23,
PGPCURVE_BRAINPOOL_P256R1, 0x09, 0x2b, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x07,
PGPCURVE_BRAINPOOL_P512R1, 0x09, 0x2b, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0d,
PGPCURVE_ED25519, 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda, 0x47, 0x0f, 0x01,
PGPCURVE_CURVE25519, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01,
0,
};
static int pgpCurveByOid(const uint8_t *p, int l)
{
uint8_t *curve;
for (curve = curve_oids; *curve; curve += 2 + curve[1])
if (l == (int)curve[1] && !memcmp(p, curve + 2, l))
return (int)curve[0];
return 0;
}
static int pgpPrtPubkeyParams(uint8_t pubkey_algo,
const uint8_t *p, const uint8_t *h, size_t hlen,
pgpDigParams keyp)
{
int rc = 1;
const uint8_t *pend = h + hlen;
int i, curve = 0;
pgpDigAlg keyalg;
if (pubkey_algo == PGPPUBKEYALGO_EDDSA) {
int len = p + 1 < pend ? p[0] : 0;
if (len == 0 || len == 0xff || p + 1 + len > pend)
goto exit;
curve = pgpCurveByOid(p + 1, len);
p += len + 1;
}
keyalg = pgpPubkeyNew(pubkey_algo, curve);
for (i = 0; i < keyalg->mpis && p + 2 <= pend; i++) {
int mpil = pgpMpiLen(p);
if (p + mpil > pend)
break;
if (keyalg->setmpi(keyalg, i, p))
break;
p += mpil;
}
/* Does the size and number of MPI's match our expectations? */
if (p == pend && i == keyalg->mpis)
rc = 0;
/* We can't handle more than one key at a time */
if (rc == 0 && keyp->alg == NULL && (keyp->tag == PGPTAG_PUBLIC_KEY ||
keyp->tag == PGPTAG_PUBLIC_SUBKEY))
keyp->alg = keyalg;
else
pgpDigAlgFree(keyalg);
exit:
return rc;
}
static int pgpPrtKey(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDigParams _digp)
{
uint8_t version = 0;
const uint8_t * p = NULL;
int rc = 1;
if (pgpVersion(h, hlen, &version))
return rc;
/* We only permit V4 keys, V3 keys are long long since deprecated */
switch (version) {
case 4:
{ pgpPktKeyV4 v = (pgpPktKeyV4)h;
if (hlen > sizeof(*v)) {
pgpPrtVal("V4 ", pgpTagTbl, tag);
pgpPrtVal(" ", pgpPubkeyTbl, v->pubkey_algo);
pgpPrtTime(" ", v->time, sizeof(v->time));
pgpPrtNL();
/* If _digp->hash is not NULL then signature is already loaded */
if (_digp->hash == NULL) {
_digp->version = v->version;
_digp->time = pgpGrab(v->time, sizeof(v->time));
_digp->pubkey_algo = v->pubkey_algo;
}
p = ((uint8_t *)v) + sizeof(*v);
rc = pgpPrtPubkeyParams(v->pubkey_algo, p, h, hlen, _digp);
}
} break;
default:
rpmlog(RPMLOG_WARNING, _("Unsupported version of key: V%d\n"), h[0]);
}
return rc;
}
static int pgpPrtUserID(pgpTag tag, const uint8_t *h, size_t hlen,
pgpDigParams _digp)
{
pgpPrtVal("", pgpTagTbl, tag);
if (_print)
fprintf(stderr, " \"%.*s\"", (int)hlen, (const char *)h);
pgpPrtNL();
free(_digp->userid);
_digp->userid = memcpy(xmalloc(hlen+1), h, hlen);
_digp->userid[hlen] = '\0';
return 0;
}
int pgpPubkeyFingerprint(const uint8_t *h, size_t hlen,
uint8_t **fp, size_t *fplen)
{
int rc = -1; /* assume failure */
const uint8_t *se;
const uint8_t *pend = h + hlen;
uint8_t version = 0;
if (pgpVersion(h, hlen, &version))
return rc;
/* We only permit V4 keys, V3 keys are long long since deprecated */
switch (version) {
case 4:
{ pgpPktKeyV4 v = (pgpPktKeyV4) (h);
int mpis = -1;
/* Packet must be larger than v to have room for the required MPIs */
if (hlen > sizeof(*v)) {
switch (v->pubkey_algo) {
case PGPPUBKEYALGO_RSA:
mpis = 2;
break;
case PGPPUBKEYALGO_DSA:
mpis = 4;
break;
case PGPPUBKEYALGO_EDDSA:
mpis = 1;
break;
}
}
se = (uint8_t *)(v + 1);
/* EdDSA has a curve id before the MPIs */
if (v->pubkey_algo == PGPPUBKEYALGO_EDDSA) {
if (se < pend && se[0] != 0x00 && se[0] != 0xff)
se += 1 + se[0];
else
se = pend; /* error out when reading the MPI */
}
while (se < pend && mpis-- > 0)
se += pgpMpiLen(se);
/* Does the size and number of MPI's match our expectations? */
if (se == pend && mpis == 0) {
DIGEST_CTX ctx = rpmDigestInit(PGPHASHALGO_SHA1, RPMDIGEST_NONE);
uint8_t *d = NULL;
size_t dlen = 0;
int i = se - h;
uint8_t in[3] = { 0x99, (i >> 8), i };
(void) rpmDigestUpdate(ctx, in, 3);
(void) rpmDigestUpdate(ctx, h, i);
(void) rpmDigestFinal(ctx, (void **)&d, &dlen, 0);
if (dlen == 20) {
rc = 0;
*fp = d;
*fplen = dlen;
} else {
free(d);
}
}
} break;
default:
rpmlog(RPMLOG_WARNING, _("Unsupported version of key: V%d\n"), version);
}
return rc;
}
static int getKeyID(const uint8_t *h, size_t hlen, pgpKeyID_t keyid)
{
uint8_t *fp = NULL;
size_t fplen = 0;
int rc = pgpPubkeyFingerprint(h, hlen, &fp, &fplen);
if (fp && fplen > 8) {
memcpy(keyid, (fp + (fplen-8)), 8);
free(fp);
}
return rc;
}
int pgpPubkeyKeyID(const uint8_t * pkt, size_t pktlen, pgpKeyID_t keyid)
{
struct pgpPkt p;
if (decodePkt(pkt, pktlen, &p))
return -1;
return getKeyID(p.body, p.blen, keyid);
}
static int pgpPrtPkt(struct pgpPkt *p, pgpDigParams _digp)
{
int rc = 0;
switch (p->tag) {
case PGPTAG_SIGNATURE:
rc = pgpPrtSig(p->tag, p->body, p->blen, _digp);
break;
case PGPTAG_PUBLIC_KEY:
/* Get the public key Key ID. */
if (!getKeyID(p->body, p->blen, _digp->signid))
_digp->saved |= PGPDIG_SAVED_ID;
else
memset(_digp->signid, 0, sizeof(_digp->signid));
rc = pgpPrtKey(p->tag, p->body, p->blen, _digp);
break;
case PGPTAG_USER_ID:
rc = pgpPrtUserID(p->tag, p->body, p->blen, _digp);
break;
case PGPTAG_RESERVED:
rc = -1;
break;
case PGPTAG_COMMENT:
case PGPTAG_COMMENT_OLD:
case PGPTAG_PUBLIC_SUBKEY:
case PGPTAG_SECRET_KEY:
case PGPTAG_SECRET_SUBKEY:
case PGPTAG_PUBLIC_SESSION_KEY:
case PGPTAG_SYMMETRIC_SESSION_KEY:
case PGPTAG_COMPRESSED_DATA:
case PGPTAG_SYMMETRIC_DATA:
case PGPTAG_MARKER:
case PGPTAG_LITERAL_DATA:
case PGPTAG_TRUST:
case PGPTAG_PHOTOID:
case PGPTAG_ENCRYPTED_MDC:
case PGPTAG_MDC:
case PGPTAG_PRIVATE_60:
case PGPTAG_PRIVATE_62:
case PGPTAG_CONTROL:
default:
pgpPrtVal("", pgpTagTbl, p->tag);
pgpPrtHex("", p->body, p->blen);
pgpPrtNL();
break;
}
return rc;
}
pgpDig pgpNewDig(void)
{
pgpDig dig = xcalloc(1, sizeof(*dig));
return dig;
}
pgpDigParams pgpDigParamsFree(pgpDigParams digp)
{
if (digp) {
pgpDigAlgFree(digp->alg);
free(digp->userid);
free(digp->hash);
memset(digp, 0, sizeof(*digp));
free(digp);
}
return NULL;
}
void pgpCleanDig(pgpDig dig)
{
if (dig != NULL) {
pgpDigParamsFree(dig->signature);
pgpDigParamsFree(dig->pubkey);
memset(dig, 0, sizeof(*dig));
}
return;
}
pgpDig pgpFreeDig(pgpDig dig)
{
if (dig != NULL) {
/* DUmp the signature/pubkey data. */
pgpCleanDig(dig);
dig = _free(dig);
}
return dig;
}
pgpDigParams pgpDigGetParams(pgpDig dig, unsigned int pkttype)
{
pgpDigParams params = NULL;
if (dig) {
switch (pkttype) {
case PGPTAG_SIGNATURE:
params = dig->signature;
break;
case PGPTAG_PUBLIC_KEY:
params = dig->pubkey;
break;
}
}
return params;
}