-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathnsscommon.cxx
1763 lines (1567 loc) · 47.2 KB
/
nsscommon.cxx
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
/*
Common functions used by the NSS-aware code in systemtap.
Copyright (C) 2009-2018 Red Hat Inc.
This file is part of systemtap, and 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 2 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/>.
*/
#include "config.h"
#include <iostream>
#include <fstream>
#include <sstream>
#include <cerrno>
#include <cstdio>
#include <cassert>
extern "C" {
#include <time.h>
#include <termios.h>
#include <unistd.h>
#include <glob.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <nss.h>
#include <nspr.h>
#include <ssl.h>
#include <prerror.h>
#include <secerr.h>
#include <sslerr.h>
#include <cryptohi.h>
#include <keyhi.h>
#include <secder.h>
#include <cert.h>
#ifdef HAVE_HTTP_SUPPORT
#include <openssl/bio.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#endif
}
#include "nsscommon.h"
#include "util.h"
using namespace std;
// Common constants and settings.
const char *
server_cert_nickname ()
{
return (const char *)"stap-server";
}
string
add_cert_db_prefix (const string &db_path) {
#if 0 && ((NSS_VMAJOR > 3) || (NSS_VMAJOR == 3 && NSS_VMINOR >= 37))
// https://wiki.mozilla.org/NSS_Shared_DB
if (db_path.find (':') == string::npos)
return string("sql:") + db_path;
#elif (NSS_VMAJOR > 3) || (NSS_VMAJOR == 3 && NSS_VMINOR >= 12)
// Use the dbm prefix, if a prefix is not already specified,
// since we're using the old database format.
if (db_path.find (':') == string::npos)
return string("dbm:") + db_path;
#endif
return db_path;
}
string
server_cert_db_path ()
{
string data_path;
const char* s_d = getenv ("SYSTEMTAP_DIR");
if (s_d != NULL)
data_path = s_d;
else
data_path = get_home_directory() + string("/.systemtap");
return data_path + "/ssl/server";
}
string
local_client_cert_db_path ()
{
string data_path;
const char* s_d = getenv ("SYSTEMTAP_DIR");
if (s_d != NULL)
data_path = s_d;
else
data_path = get_home_directory() + string("/.systemtap");
return data_path + "/ssl/client";
}
// Common error handling for applications using this file.
void
nsscommon_error (const string &msg, int logit)
{
// Call the extern "C" version supplied by each application.
nsscommon_error (msg.c_str (), logit);
}
// Logging. Enabled only by stap-serverd but called from some common methods.
static ofstream logfile;
void
start_log (const char *arg, bool redirect_clog)
{
if (logfile.is_open ())
logfile.close ();
logfile.open (arg, ios_base::app);
if (! logfile.good ())
nsscommon_error (_F("Could not open log file %s", arg));
else if (redirect_clog)
clog.rdbuf(logfile.rdbuf());
}
bool
log_ok ()
{
return logfile.good ();
}
void
log (const string &msg)
{
// What time is it?
time_t now;
time (& now);
string nowStr = ctime (& now);
// Remove the newline from the end of the time string.
nowStr.erase (nowStr.size () - 1, 1);
if (logfile.good ())
logfile << nowStr << ": " << msg << endl << flush;
else
clog << nowStr << ": " << msg << endl << flush;
}
void
end_log ()
{
if (logfile.is_open ())
logfile.close ();
}
// NSS/NSPR error reporting and cleanup.
// These functions are called from C code as well as C++, so make them extern "C".
extern "C"
void
nssError (void)
{
// See if PR_GetError can tell us what the error is.
PRErrorCode errorNumber = PR_GetError ();
// Try PR_ErrorToName and PR_ErrorToString; they are wise.
const char* errorName = PR_ErrorToName(errorNumber);
const char* errorText = PR_ErrorToString (errorNumber, PR_LANGUAGE_EN);
if (errorName && errorText)
{
nsscommon_error (_F("(%d %s) %s", errorNumber, errorName, errorText));
return;
}
// Fall back to our own scraped ssl error text.
switch (errorNumber) {
default: errorText = "Unknown error"; break;
#define NSSYERROR(code,msg) case code: errorText = msg; break
#include "stapsslerr.h"
#undef NSSYERROR
}
nsscommon_error (_F("(%d) %s", errorNumber, errorText));
}
extern "C"
SECStatus
nssInit (const char *db_path, int readWrite, int issueMessage)
{
SECStatus secStatus;
string full_db_path = add_cert_db_prefix (db_path);
db_path = full_db_path.c_str();
if (readWrite)
secStatus = NSS_InitReadWrite (db_path);
else
secStatus = NSS_Init (db_path);
if (secStatus != SECSuccess && issueMessage)
{
nsscommon_error (_F("Error initializing NSS for %s", db_path));
nssError ();
}
return secStatus;
}
extern "C"
void
nssCleanup (const char *db_path)
{
// Make sure that NSS has been initialized. Some early versions of NSS do not check this
// within NSS_Shutdown().
// When called with no certificate database path (db_path == 0), then the caller does
// not know whether NSS has actually been initialized. For example, the rpm finder,
// which calls here to shutdown NSS manually if rpmFreeCrypto() is not available
// (see rpm_finder.cxx:missing_rpm_enlist).
// However, if we're trying to close a certificate database which has not been initialized,
// then we have a (non fatal) internal error.
if (! NSS_IsInitialized ())
{
if (db_path)
{
string full_db_path = add_cert_db_prefix (db_path);
db_path = full_db_path.c_str();
nsscommon_error (_F("WARNING: Attempt to shutdown NSS for database %s, which was never initialized", db_path));
}
return;
}
// Shutdown NSS and ensure that it went down successfully. This is because we can not
// initialize NSS again if it does not.
if (NSS_Shutdown () != SECSuccess)
{
if (db_path)
{
string full_db_path = add_cert_db_prefix (db_path);
db_path = full_db_path.c_str();
nsscommon_error (_F("Unable to shutdown NSS for database %s", db_path));
}
else
nsscommon_error (_("Unable to shutdown NSS"));
nssError ();
}
}
// Certificate database password support functions.
//
// Disable character echoing, if the fd is a tty.
static void
echoOff(int fd)
{
if (isatty(fd)) {
struct termios tio;
tcgetattr(fd, &tio);
tio.c_lflag &= ~ECHO;
tcsetattr(fd, TCSAFLUSH, &tio);
}
}
/* Enable character echoing, if the fd is a tty. */
static void
echoOn(int fd)
{
if (isatty(fd)) {
struct termios tio;
tcgetattr(fd, &tio);
tio.c_lflag |= ECHO;
tcsetattr(fd, TCSAFLUSH, &tio);
}
}
/*
* This function is our custom password handler that is called by
* NSS when retrieving private certs and keys from the database. Returns a
* pointer to a string with a password for the database. Password pointer
* must be allocated by one of the NSPR memory allocation functions, or by PORT_Strdup,
* and will be freed by the caller.
*/
extern "C"
char *
nssPasswordCallback (PK11SlotInfo *info __attribute ((unused)), PRBool retry, void *arg)
{
static int retries = 0;
#define PW_MAX 200
char* password = NULL;
char* password_ret = NULL;
const char *dbname ;
int infd;
int isTTY;
if (! retry)
{
/* Not a retry. */
retries = 0;
}
else
{
/* Maximum of 2 retries for bad password. */
if (++retries > 2)
return NULL; /* No more retries */
}
/* Can only prompt for a password if stdin is a tty. */
infd = fileno (stdin);
isTTY = isatty (infd);
if (! isTTY)
{
nsscommon_error (_("Cannot prompt for certificate database password. stdin is not a tty"));
return NULL;
}
/* Prompt for password */
password = (char *)PORT_Alloc (PW_MAX);
if (! password)
{
nssError ();
return NULL;
}
dbname = (const char *)arg;
cerr << _F("Password for certificate database in %s: ", dbname) << flush;
echoOff (infd);
password_ret = fgets (password, PW_MAX, stdin);
cerr << endl << flush;
echoOn(infd);
if (password_ret)
/* stomp on the newline */
*strchrnul (password, '\n') = '\0';
else
PORT_Free (password);
return password_ret;
}
static int
create_server_cert_db (const char *db_path)
{
return create_dir (db_path, 0755);
}
static int
create_client_cert_db (const char *db_path)
{
// Same properties as the server's database, at present.
return create_server_cert_db (db_path);
}
static int
clean_cert_db (const string &db_path)
{
// First remove all files from the directory
glob_t globbuf;
string filespec = db_path + "/*";
int r = glob (filespec.c_str (), 0, NULL, & globbuf);
if (r == GLOB_NOSPACE || r == GLOB_ABORTED)
nsscommon_error (_F("Could not search certificate database directory %s", db_path.c_str ()));
else if (r != GLOB_NOMATCH)
{
for (unsigned i = 0; i < globbuf.gl_pathc; ++i)
{
if (remove_file_or_dir (globbuf.gl_pathv[i]) != 0)
nsscommon_error (_F("Could not remove %s", globbuf.gl_pathv[i]));
}
globfree(& globbuf);
}
// Now remove the directory itself.
if (remove_file_or_dir (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not remove certificate database directory %s\n%s",
db_path.c_str (), strerror (errno)));
return 1;
}
return 0;
}
static int
init_password (PK11SlotInfo *slot, const string &db_path, bool use_password)
{
// Prompt for the database password, if we're using one. Keep the passwords in memory for as
// little time as possible.
SECStatus secStatus;
if (use_password)
{
char *pw1 = 0;
int attempts;
const int max_attempts = 3;
for (attempts = 0; attempts < max_attempts; ++attempts)
{
pw1 = nssPasswordCallback (slot, false, (void*)db_path.c_str ());
if (! pw1)
continue;
cerr << "Confirm ";
bool match = false;
char *pw2 = nssPasswordCallback (slot, false, (void*)db_path.c_str ());
if (pw2)
{
if (strcmp (pw1, pw2) == 0)
match = true;
else
nsscommon_error (_("Passwords do not match"));
memset (pw2, 0, strlen (pw2));
PORT_Free (pw2);
}
if (match)
break;
memset (pw1, 0, strlen (pw1));
PORT_Free (pw1);
}
if (attempts >= max_attempts)
{
nsscommon_error (_("Too many password attempts"));
return 1;
}
secStatus = PK11_InitPin (slot, 0, pw1);
memset (pw1, 0, strlen (pw1));
PORT_Free (pw1);
}
else
secStatus = PK11_InitPin (slot, 0, 0);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Could not initialize pin for certificate database %s", db_path.c_str()));
nssError ();
return 1;
}
return 0;
}
static SECKEYPrivateKey *
generate_private_key (const string &db_path, PK11SlotInfo *slot, SECKEYPublicKey **pubkeyp)
{
if (PK11_Authenticate (slot, PR_TRUE, 0) != SECSuccess)
{
nsscommon_error (_F("Unable to authenticate the default slot for certificate database %s",
db_path.c_str ()));
nssError ();
return 0;
}
// Do some random-number initialization.
// TODO: We can do better.
srand (time (NULL));
char randbuf[64];
for (unsigned i = 0; i < sizeof (randbuf); ++i)
randbuf[i] = rand ();
PK11_RandomUpdate (randbuf, sizeof (randbuf));
memset (randbuf, 0, sizeof (randbuf));
// Set up for RSA.
PK11RSAGenParams rsaparams;
rsaparams.keySizeInBits = 4096; /* 1024 too small; SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED */
rsaparams.pe = 0x010001;
CK_MECHANISM_TYPE mechanism = CKM_RSA_PKCS_KEY_PAIR_GEN;
// Generate the key pair.
SECKEYPrivateKey *privKey = PK11_GenerateKeyPair (slot, mechanism, & rsaparams, pubkeyp,
PR_TRUE /*isPerm*/, PR_TRUE /*isSensitive*/,
0/*pwdata*/);
if (! privKey)
{
nsscommon_error (_("Unable to generate public/private key pair"));
nssError ();
}
return privKey;
}
static CERTCertificateRequest *
generate_cert_request (SECKEYPublicKey *pubk, CERTName *subject)
{
CERTSubjectPublicKeyInfo *spki = SECKEY_CreateSubjectPublicKeyInfo (pubk);
if (! spki)
{
nsscommon_error (_("Unable to create subject public key info for certificate request"));
nssError ();
return 0;
}
/* Generate certificate request */
CERTCertificateRequest *cr = CERT_CreateCertificateRequest (subject, spki, 0);
SECKEY_DestroySubjectPublicKeyInfo (spki);
if (! cr)
{
nsscommon_error (_("Unable to create certificate request"));
nssError ();
}
return cr;
}
static CERTCertificate *
create_cert (CERTCertificateRequest *certReq, const string &dnsNames)
{
// What is the current date and time?
PRTime now = PR_Now ();
// What is the date and time 1 year from now?
PRExplodedTime printableTime;
PR_ExplodeTime (now, PR_GMTParameters, & printableTime);
printableTime.tm_month += 12;
PRTime after = PR_ImplodeTime (& printableTime);
// Note that the time is now in micro-second units.
CERTValidity *validity = CERT_CreateValidity (now, after);
if (! validity)
{
nsscommon_error (_("Unable to create certificate validity dates"));
nssError ();
return 0;
}
// Create a default serial number using the current time.
PRTime serialNumber = now >> 19; // copied from certutil.
// Create the certificate.
CERTCertificate *cert = CERT_CreateCertificate (serialNumber, & certReq->subject, validity,
certReq);
CERT_DestroyValidity (validity);
if (! cert)
{
nsscommon_error (_("Unable to create certificate"));
nssError ();
return 0;
}
// Predeclare these to keep C++ happy about jumps to the label 'error'.
SECStatus secStatus = SECSuccess;
unsigned char keyUsage = 0x0;
PRArenaPool *arena = 0;
// Add the extensions that we need.
void *extHandle = CERT_StartCertExtensions (cert);
if (! extHandle)
{
nsscommon_error (_("Unable to allocate certificate extensions"));
nssError ();
goto error;
}
// Cert type extension.
keyUsage |= (0x80 >> 1); // SSL Server
keyUsage |= (0x80 >> 3); // Object signer
keyUsage |= (0x80 >> 7); // Object signing CA
SECItem bitStringValue;
bitStringValue.data = & keyUsage;
bitStringValue.len = 1;
secStatus = CERT_EncodeAndAddBitStrExtension (extHandle,
SEC_OID_NS_CERT_EXT_CERT_TYPE,
& bitStringValue, PR_TRUE);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to encode certificate type extensions"));
nssError ();
goto error;
}
// Alternate dns name extension.
if (! dnsNames.empty ())
{
arena = PORT_NewArena (DER_DEFAULT_CHUNKSIZE);
if (! arena)
{
nsscommon_error (_("Unable to allocate alternate DNS name extension for certificate"));
goto error;
}
// Walk down the comma separated list of names.
CERTGeneralName *nameList = 0;
CERTGeneralName *current = 0;
PRCList *prev = 0;
vector<string>components;
tokenize (dnsNames, components, ",");
for (unsigned i = 0; i < components.size (); ++i)
{
char *tbuf = (char *)PORT_ArenaAlloc (arena, components[i].size () + 1);
strcpy (tbuf, components[i].c_str ());
current = (CERTGeneralName *)PORT_ZAlloc (sizeof (CERTGeneralName));
if (! current)
{
nsscommon_error (_("Unable to allocate alternate DNS name extension for certificate"));
goto error;
}
if (prev)
{
current->l.prev = prev;
prev->next = & current->l;
}
else
nameList = current;
current->type = certDNSName;
current->name.other.data = (unsigned char *)tbuf;
current->name.other.len = strlen (tbuf);
prev = & current->l;
}
// At this point nameList points to the head of a doubly linked,
// but not yet circular, list and current points to its tail.
if (nameList)
{
// Make nameList circular.
nameList->l.prev = prev;
current->l.next = & nameList->l;
// Encode and add the extension.
SECItem item;
secStatus = CERT_EncodeAltNameExtension (arena, nameList, & item);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to encode alternate DNS name extension for certificate"));
nssError ();
goto error;
}
secStatus = CERT_AddExtension(extHandle,
SEC_OID_X509_SUBJECT_ALT_NAME,
& item, PR_FALSE, PR_TRUE);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to add alternate DNS name extension for certificate"));
nssError ();
goto error;
}
}
} // extra dns names specified.
// We did not create any extensions on the cert request.
assert (certReq->attributes != NULL);
assert (certReq->attributes[0] == NULL);
// Finished with cert extensions.
secStatus = CERT_FinishExtensions (extHandle);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to complete alternate DNS name extension for certificate"));
nssError ();
goto error;
}
return cert;
error:
if (arena)
PORT_FreeArena (arena, PR_FALSE);
CERT_DestroyCertificate (cert);
return 0;
}
static SECItem *
sign_cert (CERTCertificate *cert, SECKEYPrivateKey *privKey)
{
SECOidTag algID = SEC_GetSignatureAlgorithmOidTag (privKey->keyType,
SEC_OID_UNKNOWN);
if (algID == SEC_OID_UNKNOWN)
{
nsscommon_error (_("Unable to determine the signature algorithm for the signing the certificate"));
nssError ();
return 0;
}
PRArenaPool *arena = cert->arena;
SECStatus rv = SECOID_SetAlgorithmID (arena, & cert->signature, algID, 0);
if (rv != SECSuccess)
{
nsscommon_error (_("Unable to set the signature algorithm for signing the certificate"));
nssError ();
return 0;
}
/* we only deal with cert v3 here */
*(cert->version.data) = 2;
cert->version.len = 1;
SECItem der;
der.len = 0;
der.data = 0;
void *dummy = SEC_ASN1EncodeItem (arena, & der, cert,
SEC_ASN1_GET (CERT_CertificateTemplate));
if (! dummy)
{
nsscommon_error (_("Unable to encode the certificate for signing"));
nssError ();
return 0;
}
SECItem *result = (SECItem *)PORT_ArenaZAlloc (arena, sizeof (SECItem));
if (! result)
{
nsscommon_error (_("Unable to allocate memory for signing the certificate"));
return 0;
}
rv = SEC_DerSignData (arena, result, der.data, der.len, privKey, algID);
if (rv != SECSuccess)
{
nsscommon_error (_("Unable to sign the certificate"));
nssError ();
return 0;
}
cert->derCert = *result;
return result;
}
static SECStatus
add_server_cert (const string &db_path, SECItem *certDER, PK11SlotInfo *slot)
{
// Decode the cert.
CERTCertificate *cert = CERT_DecodeCertFromPackage((char *)certDER->data, certDER->len);
if (! cert)
{
nsscommon_error (_("Unable to decode certificate"));
nssError ();
return SECFailure;
}
// Import it into the database.
CERTCertDBHandle *handle = 0;
CERTCertTrust *trust = NULL;
SECStatus secStatus = PK11_ImportCert (slot, cert, CK_INVALID_HANDLE,
server_cert_nickname (), PR_FALSE);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Unable to import certificate into the database at %s", db_path.c_str ()));
nssError ();
goto done;
}
// Make it a trusted server and signer.
trust = (CERTCertTrust *)PORT_ZAlloc (sizeof (CERTCertTrust));
if (! trust)
{
nsscommon_error (_("Unable to allocate certificate trust"));
secStatus = SECFailure;
goto done;
}
secStatus = CERT_DecodeTrustString (trust, "PCu,,PCu");
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable decode trust string 'PCu,,PCu'"));
nssError ();
goto done;
}
handle = CERT_GetDefaultCertDB ();
assert (handle);
secStatus = CERT_ChangeCertTrust (handle, cert, trust);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to change certificate trust"));
nssError ();
}
done:
CERT_DestroyCertificate (cert);
if (trust)
PORT_Free (trust);
return secStatus;
}
SECStatus
add_client_cert (const string &inFileName, const string &db_path, bool init_db)
{
FILE *inFile = fopen (inFileName.c_str (), "rb");
if (! inFile)
{
nsscommon_error (_F("Could not open certificate file %s for reading\n%s",
inFileName.c_str (), strerror (errno)));
return SECFailure;
}
int fd = fileno (inFile);
struct stat info;
int rc = fstat (fd, &info);
if (rc != 0)
{
nsscommon_error (_F("Could not obtain information about certificate file %s\n%s",
inFileName.c_str (), strerror (errno)));
fclose (inFile);
return SECFailure;
}
SECItem certDER;
certDER.len = info.st_size;
certDER.data = (unsigned char *)PORT_Alloc (certDER.len);
if (certDER.data == NULL)
{
nsscommon_error (_F("Could not allocate certDER\n%s",
strerror (errno)));
fclose (inFile);
return SECFailure;
}
size_t read = fread (certDER.data, 1, certDER.len, inFile);
fclose (inFile);
if (read != certDER.len)
{
nsscommon_error (_F("Error reading from certificate file %s\n%s",
inFileName.c_str (), strerror (errno)));
return SECFailure;
}
SECStatus secStatus;
if (init_db)
{
// The http client adds a cert by calling us via add_server_trust which
// first has already called nssInit; we don't want to call nssInit twice
// See if the database already exists and can be initialized.
secStatus = nssInit (db_path.c_str (), 1/*readwrite*/, 0/*issueMessage*/);
if (secStatus != SECSuccess)
{
// Try again with a fresh database.
if (clean_cert_db (db_path.c_str ()) != 0)
{
// Message already issued.
return SECFailure;
}
// Make sure the given path exists.
if (create_client_cert_db (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not create certificate database directory %s",
db_path.c_str ()));
return SECFailure;
}
// Initialize the new database.
secStatus = nssInit (db_path.c_str (), 1/*readwrite*/);
if (secStatus != SECSuccess)
{
// Message already issued.
return SECFailure;
}
}
}
// Predeclare these to keep C++ happy about jumps to the label 'done'.
CERTCertificate *cert = 0;
CERTCertDBHandle *handle = 0;
CERTCertTrust *trust = 0;
PK11SlotInfo *slot = 0;
// Add the cert to the database
// Decode the cert.
secStatus = SECFailure;
cert = CERT_DecodeCertFromPackage ((char *)certDER.data, certDER.len);
if (! cert)
{
nsscommon_error (_("Unable to decode certificate"));
nssError ();
goto done;
}
// We need the internal slot for this database.
slot = PK11_GetInternalKeySlot ();
if (! slot)
{
nsscommon_error (_F("Could not obtain internal key slot for certificate database %s", db_path.c_str()));
nssError ();
goto done;
}
// Import it into the database.
secStatus = PK11_ImportCert (slot, cert, CK_INVALID_HANDLE,
server_cert_nickname (), PR_FALSE);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Could not import certificate into the database at %s", db_path.c_str()));
nssError ();
goto done;
}
// Make it a trusted SSL peer.
trust = (CERTCertTrust *)PORT_ZAlloc (sizeof (CERTCertTrust));
if (! trust)
{
nsscommon_error (_("Could not allocate certificate trust"));
goto done;
}
secStatus = CERT_DecodeTrustString (trust, "P,P,P");
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable decode trust string 'P,P,P'"));
nssError ();
goto done;
}
handle = CERT_GetDefaultCertDB ();
assert (handle);
secStatus = CERT_ChangeCertTrust (handle, cert, trust);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to change certificate trust"));
nssError ();
}
done:
// Free NSS/NSPR objects and shutdown NSS.
if (slot)
PK11_FreeSlot (slot);
if (trust)
PORT_Free (trust);
if (cert)
CERT_DestroyCertificate (cert);
if (certDER.data)
PORT_Free (certDER.data);
if (init_db)
nssCleanup (db_path.c_str ());
// Make sure that the cert database files are read/write by the owner and
// readable by all.
glob_t globbuf;
string filespec = db_path + "/*";
int r = glob (filespec.c_str (), 0, NULL, & globbuf);
if (r == GLOB_NOSPACE || r == GLOB_ABORTED) {
// Not fatal, just a warning
nsscommon_error (_F("Could not search certificate database directory %s", db_path.c_str ()));
}
else if (r != GLOB_NOMATCH)
{
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
for (unsigned i = 0; i < globbuf.gl_pathc; ++i)
{
// Not fatal, just a warning
if (chmod (globbuf.gl_pathv[i], mode) != 0)
nsscommon_error (_F("Could set file permissions for %s", globbuf.gl_pathv[i]));
}
globfree(&globbuf);
}
return secStatus;
}
int
gen_cert_db (const string &db_path, const string &extraDnsNames, bool use_password)
{
// Log the generation of a new database.
log (_F("Generating a new certificate database directory in %s",
db_path.c_str ()));
// Start with a clean cert database.
if (clean_cert_db (db_path.c_str ()) != 0)
{
// Message already issued.
return 1;
}
// Make sure the given path exists.
if (create_server_cert_db (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not create certificate database directory %s",
db_path.c_str ()));
return 1;
}
// Initialize the new database.
SECStatus secStatus = nssInit (db_path.c_str (), 1/*readwrite*/);
if (secStatus != SECSuccess)
{
// Message already issued.
return 1;
}
// Pre declare these to keep g++ happy about jumps to the label 'error'.
CERTName *subject = 0;
SECKEYPublicKey *pubkey = 0;
SECKEYPrivateKey *privkey = 0;
CERTCertificateRequest *cr = 0;
CERTCertificate *cert = 0;
SECItem *certDER = 0;
string dnsNames;
string hostname;
int rc;
string outFileName;
FILE *outFile = 0;
// We need the internal slot for this database.
PK11SlotInfo *slot = PK11_GetInternalKeySlot ();
if (! slot)
{
nsscommon_error (_F("Could not obtain internal key slot for certificate database %s", db_path.c_str()));
nssError ();
goto error;
}
// Establish the password (if any) for the new database.
rc = init_password (slot, db_path, use_password);
if (rc != 0)
{
// Messages already issued.
goto error;
}
// Format the cert subject.
subject = CERT_AsciiToName ((char *)"CN=Systemtap Compile Server, OU=Systemtap");