-
Notifications
You must be signed in to change notification settings - Fork 133
/
Copy pathosslsigncode.c
5207 lines (4849 loc) · 182 KB
/
osslsigncode.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
/*
OpenSSL based Authenticode signing for PE/MSI/Java CAB files.
Copyright (C) 2005-2015 Per Allansson <[email protected]>
Copyright (C) 2018-2023 Michał Trojnara <[email protected]>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL. If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so. If you
do not wish to do so, delete this exception statement from your
version. If you delete this exception statement from all source
files in the program, then also delete it here.
*/
/*
Implemented with good help from:
* Peter Gutmann's analysis of Authenticode:
https://www.cs.auckland.ac.nz/~pgut001/pubs/authenticode.txt
* MS CAB SDK documentation
https://docs.microsoft.com/en-us/previous-versions/ms974336(v=msdn.10)
* MS PE/COFF documentation
https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
* MS Windows Authenticode PE Signature Format
http://msdn.microsoft.com/en-US/windows/hardware/gg463183
(Although the part of how the actual checksumming is done is not
how it is done inside Windows. The end result is however the same
on all "normal" PE files.)
* tail -c, tcpdump, mimencode & openssl asn1parse :)
*/
#include "osslsigncode.h"
#include "helpers.h"
/*
* $ echo -n 3006030200013000 | xxd -r -p | openssl asn1parse -i -inform der
* 0:d=0 hl=2 l= 6 cons: SEQUENCE
* 2:d=1 hl=2 l= 2 prim: BIT STRING
* 6:d=1 hl=2 l= 0 cons: SEQUENCE
*/
const u_char java_attrs_low[] = {
0x30, 0x06, 0x03, 0x02, 0x00, 0x01, 0x30, 0x00
};
/*
* $ echo -n 300c060a2b060104018237020115 | xxd -r -p | openssl asn1parse -i -inform der
* 0:d=0 hl=2 l= 12 cons: SEQUENCE
* 2:d=1 hl=2 l= 10 prim: OBJECT :Microsoft Individual Code Signing
*/
const u_char purpose_ind[] = {
0x30, 0x0c, 0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04,
0x01, 0x82, 0x37, 0x02, 0x01, 0x15
};
/*
* $ echo -n 300c060a2b060104018237020116 | xxd -r -p | openssl asn1parse -i -inform der
* 0:d=0 hl=2 l= 12 cons: SEQUENCE
* 2:d=1 hl=2 l= 10 prim: OBJECT :Microsoft Commercial Code Signing
*/
const u_char purpose_comm[] = {
0x30, 0x0c, 0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04,
0x01, 0x82, 0x37, 0x02, 0x01, 0x16
};
/*
* ASN.1 definitions (more or less from official MS Authenticode docs)
*/
ASN1_CHOICE(SpcString) = {
ASN1_IMP_OPT(SpcString, value.unicode, ASN1_BMPSTRING, 0),
ASN1_IMP_OPT(SpcString, value.ascii, ASN1_IA5STRING, 1)
} ASN1_CHOICE_END(SpcString)
IMPLEMENT_ASN1_FUNCTIONS(SpcString)
ASN1_SEQUENCE(SpcSerializedObject) = {
ASN1_SIMPLE(SpcSerializedObject, classId, ASN1_OCTET_STRING),
ASN1_SIMPLE(SpcSerializedObject, serializedData, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(SpcSerializedObject)
IMPLEMENT_ASN1_FUNCTIONS(SpcSerializedObject)
ASN1_CHOICE(SpcLink) = {
ASN1_IMP_OPT(SpcLink, value.url, ASN1_IA5STRING, 0),
ASN1_IMP_OPT(SpcLink, value.moniker, SpcSerializedObject, 1),
ASN1_EXP_OPT(SpcLink, value.file, SpcString, 2)
} ASN1_CHOICE_END(SpcLink)
IMPLEMENT_ASN1_FUNCTIONS(SpcLink)
ASN1_SEQUENCE(SpcSpOpusInfo) = {
ASN1_EXP_OPT(SpcSpOpusInfo, programName, SpcString, 0),
ASN1_EXP_OPT(SpcSpOpusInfo, moreInfo, SpcLink, 1)
} ASN1_SEQUENCE_END(SpcSpOpusInfo)
IMPLEMENT_ASN1_FUNCTIONS(SpcSpOpusInfo)
ASN1_SEQUENCE(SpcSipInfo) = {
ASN1_SIMPLE(SpcSipInfo, a, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, string, ASN1_OCTET_STRING),
ASN1_SIMPLE(SpcSipInfo, b, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, c, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, d, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, e, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, f, ASN1_INTEGER),
} ASN1_SEQUENCE_END(SpcSipInfo)
IMPLEMENT_ASN1_FUNCTIONS(SpcSipInfo)
ASN1_SEQUENCE(SpcAttributeTypeAndOptionalValue) = {
ASN1_SIMPLE(SpcAttributeTypeAndOptionalValue, type, ASN1_OBJECT),
ASN1_OPT(SpcAttributeTypeAndOptionalValue, value, ASN1_ANY)
} ASN1_SEQUENCE_END(SpcAttributeTypeAndOptionalValue)
IMPLEMENT_ASN1_FUNCTIONS(SpcAttributeTypeAndOptionalValue)
ASN1_SEQUENCE(AlgorithmIdentifier) = {
ASN1_SIMPLE(AlgorithmIdentifier, algorithm, ASN1_OBJECT),
ASN1_OPT(AlgorithmIdentifier, parameters, ASN1_ANY)
} ASN1_SEQUENCE_END(AlgorithmIdentifier)
IMPLEMENT_ASN1_FUNCTIONS(AlgorithmIdentifier)
ASN1_SEQUENCE(DigestInfo) = {
ASN1_SIMPLE(DigestInfo, digestAlgorithm, AlgorithmIdentifier),
ASN1_SIMPLE(DigestInfo, digest, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(DigestInfo)
IMPLEMENT_ASN1_FUNCTIONS(DigestInfo)
ASN1_SEQUENCE(SpcIndirectDataContent) = {
ASN1_SIMPLE(SpcIndirectDataContent, data, SpcAttributeTypeAndOptionalValue),
ASN1_SIMPLE(SpcIndirectDataContent, messageDigest, DigestInfo)
} ASN1_SEQUENCE_END(SpcIndirectDataContent)
IMPLEMENT_ASN1_FUNCTIONS(SpcIndirectDataContent)
ASN1_SEQUENCE(CatalogAuthAttr) = {
ASN1_SIMPLE(CatalogAuthAttr, type, ASN1_OBJECT),
ASN1_OPT(CatalogAuthAttr, contents, ASN1_ANY)
} ASN1_SEQUENCE_END(CatalogAuthAttr)
IMPLEMENT_ASN1_FUNCTIONS(CatalogAuthAttr)
/*
* Structures for Authenticode Timestamp
*/
ASN1_SEQUENCE(TimeStampRequestBlob) = {
ASN1_SIMPLE(TimeStampRequestBlob, type, ASN1_OBJECT),
ASN1_EXP_OPT(TimeStampRequestBlob, signature, ASN1_OCTET_STRING, 0)
} ASN1_SEQUENCE_END(TimeStampRequestBlob)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampRequestBlob)
ASN1_SEQUENCE(TimeStampRequest) = {
ASN1_SIMPLE(TimeStampRequest, type, ASN1_OBJECT),
ASN1_SIMPLE(TimeStampRequest, blob, TimeStampRequestBlob)
} ASN1_SEQUENCE_END(TimeStampRequest)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampRequest)
ASN1_SEQUENCE(CatalogInfo) = {
ASN1_SIMPLE(CatalogInfo, digest, ASN1_OCTET_STRING),
ASN1_SET_OF(CatalogInfo, attributes, CatalogAuthAttr)
} ASN1_SEQUENCE_END(CatalogInfo)
IMPLEMENT_ASN1_FUNCTIONS(CatalogInfo)
ASN1_SEQUENCE(MsCtlContent) = {
ASN1_SIMPLE(MsCtlContent, type, SpcAttributeTypeAndOptionalValue),
ASN1_SIMPLE(MsCtlContent, identifier, ASN1_OCTET_STRING),
ASN1_SIMPLE(MsCtlContent, time, ASN1_UTCTIME),
ASN1_SIMPLE(MsCtlContent, version, SpcAttributeTypeAndOptionalValue),
ASN1_SEQUENCE_OF(MsCtlContent, header_attributes, CatalogInfo),
ASN1_OPT(MsCtlContent, filename, ASN1_ANY)
} ASN1_SEQUENCE_END(MsCtlContent)
IMPLEMENT_ASN1_FUNCTIONS(MsCtlContent)
ASN1_SEQUENCE(EngineControl) = {
ASN1_SIMPLE(EngineControl, cmd, ASN1_OCTET_STRING),
ASN1_SIMPLE(EngineControl, param, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(EngineControl)
IMPLEMENT_ASN1_FUNCTIONS(EngineControl)
/* Prototypes */
static ASN1_INTEGER *create_nonce(int bits);
static char *clrdp_url_get_x509(X509 *cert);
static time_t time_t_get_asn1_time(const ASN1_TIME *s);
static time_t time_t_get_si_time(PKCS7_SIGNER_INFO *si);
static ASN1_UTCTIME *asn1_time_get_si_time(PKCS7_SIGNER_INFO *si);
static time_t time_t_get_cms_time(CMS_ContentInfo *cms);
static CMS_ContentInfo *cms_get_timestamp(PKCS7_SIGNED *p7_signed,
PKCS7_SIGNER_INFO *countersignature);
static int cursig_set_nested(PKCS7 *cursig, PKCS7 *p7);
static int nested_signatures_number_get(PKCS7 *p7);
static int X509_attribute_chain_append_object(STACK_OF(X509_ATTRIBUTE) **unauth_attr,
u_char *p, int len, const char *oid);
static STACK_OF(PKCS7) *signature_list_create(PKCS7 *p7);
static int PKCS7_compare(const PKCS7 *const *a, const PKCS7 *const *b);
static PKCS7 *pkcs7_get_sigfile(FILE_FORMAT_CTX *ctx);
static void print_cert(X509 *cert, int i);
static int x509_store_load_crlfile(X509_STORE *store, char *cafile, char *crlfile);
static void engine_control_set(GLOBAL_OPTIONS *options, const char *arg);
/*
A timestamp request looks like this:
POST <someurl> HTTP/1.1
Content-Type: application/octet-stream
Content-Length: ...
Accept: application/octet-stream
User-Agent: Transport
Host: ...
Cache-Control: no-cache
<base64encoded blob>
.. and the blob has the following ASN1 structure:
0:d=0 hl=4 l= 291 cons: SEQUENCE
4:d=1 hl=2 l= 10 prim: OBJECT :1.3.6.1.4.1.311.3.2.1
16:d=1 hl=4 l= 275 cons: SEQUENCE
20:d=2 hl=2 l= 9 prim: OBJECT :pkcs7-data
31:d=2 hl=4 l= 260 cons: cont [ 0 ]
35:d=3 hl=4 l= 256 prim: OCTET STRING
<signature>
.. and it returns a base64 encoded PKCS#7 structure.
*/
/*
* Encode RFC3161 timestamp request and write it into BIO
* [in] p7: new PKCS#7 signature
* [in] md: message digest algorithm type
* [returns] pointer to BIO with RFC3161 Timestamp Request
*/
static BIO *bio_encode_rfc3161_request(PKCS7 *p7, const EVP_MD *md)
{
STACK_OF(PKCS7_SIGNER_INFO) *signer_info;
PKCS7_SIGNER_INFO *si;
u_char mdbuf[EVP_MAX_MD_SIZE];
TS_MSG_IMPRINT *msg_imprint = NULL;
ASN1_INTEGER *nonce = NULL;
X509_ALGOR *alg = NULL;
TS_REQ *req = NULL;
BIO *bout = NULL, *bhash = NULL;
u_char *p;
int len;
signer_info = PKCS7_get_signer_info(p7);
if (!signer_info)
goto out;
si = sk_PKCS7_SIGNER_INFO_value(signer_info, 0);
if (!si)
goto out;
bhash = BIO_new(BIO_f_md());
if (!BIO_set_md(bhash, md)) {
fprintf(stderr, "Unable to set the message digest of BIO\n");
goto out;
}
BIO_push(bhash, BIO_new(BIO_s_null()));
BIO_write(bhash, si->enc_digest->data, si->enc_digest->length);
BIO_gets(bhash, (char*)mdbuf, EVP_MD_size(md));
req = TS_REQ_new();
if (!req)
goto out;
if (!TS_REQ_set_version(req, 1))
goto out;
msg_imprint = TS_MSG_IMPRINT_new();
if (!msg_imprint)
goto out;
alg = X509_ALGOR_new();
if (!alg)
goto out;
X509_ALGOR_set_md(alg, md);
if (!X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_nid(md)), V_ASN1_NULL, NULL))
goto out;
if (!TS_MSG_IMPRINT_set_algo(msg_imprint, alg))
goto out;
if (!TS_MSG_IMPRINT_set_msg(msg_imprint, mdbuf, EVP_MD_size(md)))
goto out;
if (!TS_REQ_set_msg_imprint(req, msg_imprint))
goto out;
/* Setting nonce */
nonce = create_nonce(NONCE_LENGTH);
if (!nonce)
goto out;
if (!TS_REQ_set_nonce(req, nonce))
goto out;
/* TSA is expected to include its signing certificate in the response, flag 0xFF */
if (!TS_REQ_set_cert_req(req, 1))
goto out;
len = i2d_TS_REQ(req, NULL);
p = OPENSSL_malloc((size_t)len);
len = i2d_TS_REQ(req, &p);
p -= len;
bout = BIO_new(BIO_s_mem());
BIO_write(bout, p, len);
OPENSSL_free(p);
(void)BIO_flush(bout);
out:
BIO_free_all(bhash);
ASN1_INTEGER_free(nonce);
TS_MSG_IMPRINT_free(msg_imprint);
X509_ALGOR_free(alg);
TS_REQ_free(req);
return bout;
}
static ASN1_INTEGER *create_nonce(int bits)
{
unsigned char buf[20];
ASN1_INTEGER *nonce = NULL;
int len = (bits - 1) / 8 + 1;
int i;
if (len > (int)sizeof(buf)) {
fprintf(stderr, "Invalid nonce size\n");
return NULL;
}
if (RAND_bytes(buf, len) <= 0) {
fprintf(stderr, "Random nonce generation failed\n");
return NULL;
}
/* Find the first non-zero byte and creating ASN1_INTEGER object. */
for (i = 0; i < len && !buf[i]; ++i) {
}
nonce = ASN1_INTEGER_new();
if (!nonce) {
fprintf(stderr, "Could not create nonce\n");
return NULL;
}
OPENSSL_free(nonce->data);
nonce->length = len - i;
nonce->data = OPENSSL_malloc((size_t)nonce->length + 1);
memcpy(nonce->data, buf + i, (size_t)nonce->length);
return nonce;
}
/*
* Encode authenticode timestamp request and write it into BIO
* [in] p7: new PKCS#7 signature
* [returns] pointer to BIO with authenticode Timestamp Request
*/
static BIO *bio_encode_authenticode_request(PKCS7 *p7)
{
STACK_OF(PKCS7_SIGNER_INFO) *signer_info;
PKCS7_SIGNER_INFO *si;
TimeStampRequest *req;
BIO *bout, *b64;
u_char *p;
int len;
signer_info = PKCS7_get_signer_info(p7);
if (!signer_info)
return 0; /* FAILED */
si = sk_PKCS7_SIGNER_INFO_value(signer_info, 0);
if (!si)
return 0; /* FAILED */
req = TimeStampRequest_new();
req->type = OBJ_txt2obj(SPC_TIME_STAMP_REQUEST_OBJID, 1);
req->blob->type = OBJ_nid2obj(NID_pkcs7_data);
req->blob->signature = si->enc_digest;
len = i2d_TimeStampRequest(req, NULL);
p = OPENSSL_malloc((size_t)len);
len = i2d_TimeStampRequest(req, &p);
p -= len;
req->blob->signature = NULL;
TimeStampRequest_free(req);
bout = BIO_new(BIO_s_mem());
b64 = BIO_new(BIO_f_base64());
bout = BIO_push(b64, bout);
BIO_write(bout, p, len);
OPENSSL_free(p);
(void)BIO_flush(bout);
return bout;
}
/*
* If successful the RFC 3161 timestamp will be written into
* the PKCS7 SignerInfo structure as an unauthenticated attribute - cont[1].
* [in, out] p7: new PKCS#7 signature
* [in] response: RFC3161 response
* [in] verbose: additional output mode
* [returns] 1 on error or 0 on success
*/
static int attach_rfc3161_response(PKCS7 *p7, TS_RESP *response, int verbose)
{
PKCS7_SIGNER_INFO *si;
TS_STATUS_INFO *status;
PKCS7 *token;
u_char *p;
int i, len;
STACK_OF(PKCS7_SIGNER_INFO) *signer_info = PKCS7_get_signer_info(p7);
if (!signer_info)
return 1; /* FAILED */
si = sk_PKCS7_SIGNER_INFO_value(signer_info, 0);
if (!si)
return 1; /* FAILED */
if (!response)
return 1; /* FAILED */
status = TS_RESP_get_status_info(response);
if (ASN1_INTEGER_get(TS_STATUS_INFO_get0_status(status)) != 0) {
if (verbose) {
const STACK_OF(ASN1_UTF8STRING) *reasons = TS_STATUS_INFO_get0_text(status);
fprintf(stderr, "Timestamping failed: status %ld\n", ASN1_INTEGER_get(TS_STATUS_INFO_get0_status(status)));
for (i = 0; i < sk_ASN1_UTF8STRING_num(reasons); i++) {
ASN1_UTF8STRING *reason = sk_ASN1_UTF8STRING_value(reasons, i);
fprintf(stderr, "%s\n", ASN1_STRING_get0_data(reason));
}
}
return 1; /* FAILED */
}
token = TS_RESP_get_token(response);
if (((len = i2d_PKCS7(token, NULL)) <= 0) || (p = OPENSSL_malloc((size_t)len)) == NULL) {
if (verbose) {
fprintf(stderr, "Failed to convert pkcs7: %d\n", len);
ERR_print_errors_fp(stderr);
}
return 1; /* FAILED */
}
len = i2d_PKCS7(token, &p);
p -= len;
if (!X509_attribute_chain_append_object(&(si->unauth_attr), p, len, SPC_RFC3161_OBJID)) {
OPENSSL_free(p);
return 1; /* FAILED */
}
OPENSSL_free(p);
return 0; /* OK */
}
/*
* If successful the authenticode timestamp will be written into
* the PKCS7 SignerInfo structure as an unauthenticated attribute - cont[1]:
* p7->d.sign->signer_info->unauth_attr
* [in, out] p7: new PKCS#7 signature
* [in] resp: PKCS#7 authenticode response
* [in] verbose: additional output mode
* [returns] 1 on error or 0 on success
*/
static int attach_authenticode_response(PKCS7 *p7, PKCS7 *resp, int verbose)
{
PKCS7_SIGNER_INFO *info, *si;
u_char *p;
int len, i;
STACK_OF(PKCS7_SIGNER_INFO) *signer_info;
if (!resp) {
return 1; /* FAILED */
}
for(i = sk_X509_num(resp->d.sign->cert)-1; i>=0; i--) {
PKCS7_add_certificate(p7, sk_X509_value(resp->d.sign->cert, i));
}
signer_info = PKCS7_get_signer_info(resp);
if (!signer_info) {
PKCS7_free(resp);
return 1; /* FAILED */
}
info = sk_PKCS7_SIGNER_INFO_value(signer_info, 0);
if (!info) {
PKCS7_free(resp);
return 1; /* FAILED */
}
if (((len = i2d_PKCS7_SIGNER_INFO(info, NULL)) <= 0) || (p = OPENSSL_malloc((size_t)len)) == NULL) {
if (verbose) {
fprintf(stderr, "Failed to convert signer info: %d\n", len);
ERR_print_errors_fp(stderr);
}
PKCS7_free(resp);
return 1; /* FAILED */
}
len = i2d_PKCS7_SIGNER_INFO(info, &p);
p -= len;
PKCS7_free(resp);
signer_info = PKCS7_get_signer_info(p7);
if (!signer_info)
return 1; /* FAILED */
si = sk_PKCS7_SIGNER_INFO_value(signer_info, 0);
if (!si)
return 1; /* FAILED */
if (!X509_attribute_chain_append_object(&(si->unauth_attr), p, len, PKCS9_COUNTER_SIGNATURE)) {
OPENSSL_free(p);
return 1; /* FAILED */
}
OPENSSL_free(p);
return 0; /* OK */
}
#if defined(ENABLE_CURL) || OPENSSL_VERSION_NUMBER >= 0x30000000L
static void print_proxy(char *proxy)
{
if (proxy) {
printf ("Using configured proxy: %s\n", proxy);
} else {
char *http_proxy, *https_proxy;
http_proxy = getenv("http_proxy");
if (!http_proxy)
http_proxy = getenv("HTTP_PROXY");
if (http_proxy && *http_proxy != '\0')
printf ("Using environmental HTTP proxy: %s\n", http_proxy);
https_proxy = getenv("https_proxy");
if (!https_proxy)
https_proxy = getenv("HTTPS_PROXY");
if (https_proxy && *https_proxy != '\0')
printf ("Using environmental HTTPS proxy: %s\n", https_proxy);
}
}
#endif /* ENABLE_CURL || OPENSSL_VERSION_NUMBER < 0x30000000L */
#if OPENSSL_VERSION_NUMBER<0x30000000L
#ifdef ENABLE_CURL
static int blob_has_nl = 0;
/*
* Callback for writing received data
*/
static size_t curl_write(void *ptr, size_t sz, size_t nmemb, void *stream)
{
size_t written, len = sz * nmemb;
if (len > 0 && !blob_has_nl) {
if (memchr(ptr, '\n', len))
blob_has_nl = 1;
}
if (!BIO_write_ex((BIO*)stream, ptr, len, &written) || written != len)
return 0; /* FAILED */
return written;
}
/*
* Get data from HTTP server.
* [out] http_code: HTTP status
* [in] url: URL of the CRL distribution point or Time-Stamp Authority HTTP server
* [in] req: timestamp request
* [in] proxy: proxy to getting the timestamp through
* [in] noverifypeer: do not verify the Time-Stamp Authority's SSL certificate
* [in] verbose: additional output mode
* [in] rfc3161: Authenticode / RFC3161 Timestamp switch
* [returns] pointer to BIO with X509 Certificate Revocation List or timestamp response
*/
static BIO *bio_get_http_curl(long *http_code, char *url, BIO *req, char *proxy,
int noverifypeer, int verbose, int rfc3161)
{
CURL *curl;
struct curl_slist *slist = NULL;
CURLcode res;
BIO *bin;
u_char *p = NULL;
long len = 0;
if (!url) {
return NULL; /* FAILED */
}
print_proxy(proxy);
/* Start a libcurl easy session and set options for a curl easy handle */
printf("Connecting to %s\n", url);
curl = curl_easy_init();
if (proxy) {
res = curl_easy_setopt(curl, CURLOPT_PROXY, proxy);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
if (!strncmp("http:", proxy, 5)) {
res = curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
}
if (!strncmp("socks:", proxy, 6)) {
res = curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
}
}
res = curl_easy_setopt(curl, CURLOPT_URL, url);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
/*
* ask libcurl to show us the verbose output
* curl_easy_setopt(curl, CURLOPT_VERBOSE, 42);
*/
if (noverifypeer) {
res = curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
}
if (req) { /* POST */
if (rfc3161) {
/* RFC3161 Timestamp */
slist = curl_slist_append(slist, "Content-Type: application/timestamp-query");
slist = curl_slist_append(slist, "Accept: application/timestamp-reply");
} else {
/* Authenticode Timestamp */
slist = curl_slist_append(slist, "Content-Type: application/octet-stream");
slist = curl_slist_append(slist, "Accept: application/octet-stream");
}
slist = curl_slist_append(slist, "User-Agent: Transport");
slist = curl_slist_append(slist, "Cache-Control: no-cache");
res = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
len = BIO_get_mem_data(req, &p);
res = curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, len);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
res = curl_easy_setopt(curl, CURLOPT_POSTFIELDS, (char*)p);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
res = curl_easy_setopt(curl, CURLOPT_POST, 1);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
}
bin = BIO_new(BIO_s_mem());
BIO_set_mem_eof_return(bin, 0);
res = curl_easy_setopt(curl, CURLOPT_WRITEDATA, bin);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
res = curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_write);
if (res != CURLE_OK) {
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
}
/* Perform the request */
res = curl_easy_perform(curl);
curl_slist_free_all(slist);
if (res != CURLE_OK) {
BIO_free_all(bin);
if (verbose)
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(res), url);
curl_easy_cleanup(curl);
return NULL; /* FAILED */
} else {
/* CURLE_OK (0) */
(void)BIO_flush(bin);
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, http_code);
}
/* End a libcurl easy handle */
curl_easy_cleanup(curl);
if (req && !rfc3161) {
/* BASE64 encoded Authenticode Timestamp */
BIO *b64 = BIO_new(BIO_f_base64());
if (!blob_has_nl)
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bin = BIO_push(b64, bin);
}
return bin;
}
#endif /* ENABLE_CURL */
#else /* OPENSSL_VERSION_NUMBER<0x30000000L */
/* HTTP callback function that supports TLS connection also via HTTPS proxy */
static BIO *http_tls_cb(BIO *bio, void *arg, int connect, int detail)
{
HTTP_TLS_Info *info = (HTTP_TLS_Info *)arg;
SSL_CTX *ssl_ctx = info->ssl_ctx;
if (ssl_ctx == NULL) {
/* not using TLS */
return bio;
}
if (connect && detail) {
/* connecting with TLS */
SSL *ssl;
BIO *sbio = NULL;
if (info->use_proxy && !OSSL_HTTP_proxy_connect(bio, info->server,
info->port, NULL, NULL, info->timeout, NULL, NULL)) {
return NULL;
}
sbio = BIO_new(BIO_f_ssl());
if (sbio == NULL) {
return NULL;
}
ssl = SSL_new(ssl_ctx);
if (ssl == NULL) {
BIO_free(sbio);
return NULL;
}
SSL_set_tlsext_host_name(ssl, info->server);
SSL_set_connect_state(ssl);
BIO_set_ssl(sbio, ssl, BIO_CLOSE);
bio = BIO_push(sbio, bio);
}
return bio;
}
static int verify_callback(int ok, X509_STORE_CTX *ctx)
{
if (!ok) {
int error = X509_STORE_CTX_get_error(ctx);
print_cert(X509_STORE_CTX_get_current_cert(ctx), 0);
if (error == X509_V_ERR_UNABLE_TO_GET_CRL) {
char *url = clrdp_url_get_x509(X509_STORE_CTX_get_current_cert(ctx));
printf("\tWarning: Ignoring \'%s\' error for CRL validation\n",
X509_verify_cert_error_string(error));
printf("\nUse the \"-HTTPS-CRLfile\" option to verify CRL\n");
if (url) {
printf("HTTPS's CRL distribution point: %s\n", url);
OPENSSL_free(url);
}
return 1;
} else {
printf("\tError: %s\n\n", X509_verify_cert_error_string(error));
}
}
return ok;
}
/*
* Read data from socket BIO
* [in] s_bio: socket BIO
* [in] rctx: open connection context
* [in] use_ssl: HTTPS request switch
* [returns] memory BIO
*/
static BIO *socket_bio_read(BIO *s_bio, OSSL_HTTP_REQ_CTX *rctx, int use_ssl)
{
int retry = 1, ok = 0, written = 0, resp_len = 0;
char *buf = OPENSSL_malloc(OSSL_HTTP_DEFAULT_MAX_RESP_LEN);
BIO *resp = BIO_new(BIO_s_mem());
if (rctx) {
resp_len = (int)OSSL_HTTP_REQ_CTX_get_resp_len(rctx);
}
if (resp_len == 0) {
if (use_ssl)
BIO_ssl_shutdown(s_bio);
else {
int fd = (int)BIO_get_fd(s_bio, NULL);
if (fd >= 0) {
#ifdef WIN32
(void)shutdown(fd, SD_SEND);
#else /* WIN32 */
(void)shutdown(fd, SHUT_WR);
#endif /* WIN32 */
}
}
}
ERR_clear_error();
while (retry) {
int n;
errno = 0;
n = BIO_read(s_bio, buf, OSSL_HTTP_DEFAULT_MAX_RESP_LEN);
if (n > 0) {
written += BIO_write(resp, buf, n);
} else if (BIO_eof(s_bio) == 1) {
ok = 1;
retry = 0; /* EOF */
} else if (BIO_should_retry(s_bio)) {
} else {
unsigned long err = ERR_get_error();
if (err == 0) {
ok = 1;
retry = 0; /* use_ssl EOF */
} else {
fprintf(stderr, "\nHTTP failure: error %ld: %s\n", err, ERR_reason_error_string(err));
retry = 0; /* FAILED */
}
}
if (resp_len > 0 && resp_len == written) {
ok = 1;
retry = 0; /* all response has been read */
}
}
OSSL_HTTP_close(rctx, ok);
OPENSSL_free(buf);
if (!ok) {
BIO_free_all(resp);
resp = NULL;
}
return resp;
}
/*
* pkcs7-signedData bytes found indicates DER form
* in otherwise BASE64 encoded
* '\n' newline character means BASE64 line with newline at the end
* in otherwise BIO_FLAGS_BASE64_NO_NL flag must me set
* [in, out] resp: memory BIO with Authenticode Timestamp data
* [returns] none
*/
static void check_authenticode_timestamp(BIO **resp)
{
u_char *ptr = NULL;
const u_char pkcs7_signed[] = {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x02};
int i, len, pkcs7_signed_len, found = 0;
len = (int)BIO_get_mem_data(*resp, &ptr);
if (len <= 0) {
return;
}
pkcs7_signed_len = (int)sizeof pkcs7_signed;
for (i = 0; i <= len - pkcs7_signed_len; i++) {
if (memcmp(ptr + i, pkcs7_signed, (size_t)pkcs7_signed_len) == 0) {
found = 1;
break;
}
}
if (!found) {
/* BASE64 encoded Authenticode Timestamp */
BIO *b64 = BIO_new(BIO_f_base64());
if (!memchr(ptr, '\n', (size_t)len)) {
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
} else {
BIO *bio_mem = BIO_new_mem_buf(ptr, len);
BIO_push(b64, bio_mem);
}
*resp = BIO_push(b64, *resp);
}
}
/*
* Get data from HTTP server.
* [in] url: URL of the CRL distribution point or Time-Stamp Authority HTTP server
* [in] req: timestamp request
* [in] proxy: proxy to getting the timestamp through
* [in] rfc3161: Authenticode / RFC3161 Timestamp switch
* [in] cafile: file contains concatenated CA certificates in PEM format
* [in] crlfile: file contains Certificate Revocation List (CRLs)
* [returns] pointer to BIO with X509 Certificate Revocation List or timestamp response
*/
static BIO *bio_get_http(char *url, BIO *req, char *proxy, int rfc3161, char *cafile, char *crlfile)
{
BIO *tmp_bio = NULL, *s_bio = NULL, *resp = NULL;
OSSL_HTTP_REQ_CTX *rctx = NULL;
HTTP_TLS_Info info;
SSL_CTX *ssl_ctx = NULL;
char *server = NULL, *port = NULL, *path = NULL;
int timeout = -1; /* blocking mode, exactly one try, see BIO_do_connect_retry() */
int keep_alive = 1; /* prefer */
int use_ssl = 0;
if (!url) {
return NULL; /* FAILED */
}
print_proxy(proxy);
printf("Connecting to %s\n", url);
if (!OSSL_HTTP_parse_url(url, &use_ssl, NULL, &server, &port, NULL, &path, NULL, NULL)) {
return NULL; /* FAILED */
}
if (use_ssl) {
X509_STORE *store = NULL;
ssl_ctx = SSL_CTX_new(TLS_client_method());
if (cafile) {
printf("HTTPS-CAfile: %s\n", cafile);
if (crlfile)
printf("HTTPS-CRLfile: %s\n", crlfile);
store = SSL_CTX_get_cert_store(ssl_ctx);
if (x509_store_load_crlfile(store, cafile, crlfile))
SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, verify_callback);
else
printf("Warning: HTTPS verification was skipped\n");
} else {
printf("Warning: HTTPS verification was skipped\n");
}
}
info.server = server;
info.port = port;
info.use_proxy = OSSL_HTTP_adapt_proxy(proxy, NULL, server, use_ssl) != NULL;
info.timeout = timeout;
info.ssl_ctx = ssl_ctx;
if (!req) { /* GET */
const char *expected_content_type = "application/pkix-crl";
s_bio = OSSL_HTTP_get(url, proxy, NULL, NULL, NULL, http_tls_cb, &info, 0,
NULL, expected_content_type, 0, 0, timeout);
} else { /* POST */
const char *content_type = "application/timestamp-query"; /* RFC3161 Timestamp */
const char *expected_content_type = "application/timestamp-reply";
if (!rfc3161) {
u_char *p = NULL;
long len = BIO_get_mem_data(req, &p);
tmp_bio = BIO_new(BIO_s_mem());
BIO_write(tmp_bio, p, (int)len);
req = BIO_push(tmp_bio, req);
content_type = "application/octet-stream"; /* Authenticode Timestamp */
expected_content_type = "application/octet-stream";
}
s_bio = OSSL_HTTP_transfer(&rctx, server, port, path, use_ssl, proxy, NULL,
NULL, NULL, http_tls_cb, &info, 0, NULL, content_type, req,
expected_content_type, 0, 0, timeout, keep_alive);
BIO_free(tmp_bio);
}
OPENSSL_free(server);
OPENSSL_free(port);
OPENSSL_free(path);
SSL_CTX_free(ssl_ctx);
if (s_bio) {
resp = socket_bio_read(s_bio, rctx, use_ssl);
BIO_free_all(s_bio);
if (resp && req && !rfc3161)
check_authenticode_timestamp(&resp);
} else {
fprintf(stderr, "\nHTTP failure: Failed to get data from %s\n", url);
}
return resp;
}
#endif /* OPENSSL_VERSION_NUMBER<0x30000000L */
/*
* Decode a HTTP response from BIO and write it into the PKCS7 structure
* Add timestamp to the PKCS7 SignerInfo structure:
* sig->d.sign->signer_info->unauth_attr
* [in, out] p7: new PKCS#7 signature
* [in] ctx: structure holds input and output data
* [in] url: URL of the Time-Stamp Authority server
* [in] rfc3161: Authenticode / RFC3161 Timestamp switch
* [returns] 1 on error or 0 on success
*/
static int add_timestamp(PKCS7 *p7, FILE_FORMAT_CTX *ctx, char *url, int rfc3161)
{
BIO *req, *resp;
int verbose = ctx->options->verbose || ctx->options->ntsurl == 1;
int res = 1;
#if OPENSSL_VERSION_NUMBER<0x30000000L
#ifdef ENABLE_CURL
long http_code = -1;
#endif /* ENABLE_CURL */
#endif /* OPENSSL_VERSION_NUMBER<0x30000000L */
/* Encode timestamp request */
if (rfc3161) {
req = bio_encode_rfc3161_request(p7, ctx->options->md);
} else {
req = bio_encode_authenticode_request(p7);