/[pdpsoft]/trunk/fetchcrl/TrustAnchor.pm
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Contents of /trunk/fetchcrl/TrustAnchor.pm

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Revision 1758 - (show annotations) (download) (as text)
Fri Jun 11 15:39:04 2010 UTC (11 years, 5 months ago) by davidg
Original Path: fetchcrl/TrustAnchor.pm
File MIME type: application/x-perl
File size: 23267 byte(s)
Initial import of fetch-crl3

1 #
2 # @(#)$Id$
3 #
4 # ###########################################################################
5 #
6 #
7 package TrustAnchor;
8 use strict;
9 use File::Basename;
10 use LWP;
11 require ConfigTiny and import ConfigTiny unless defined &ConfigTiny::new;
12 require CRL and import CRL unless defined &CRL::new;
13 require base64 and import base64 unless defined &base64::b64encode;
14 use vars qw/ $log $cnf /;
15
16 sub new {
17 my $obref = {}; bless $obref;
18 my $self = shift;
19 $self = $obref;
20 my $name = shift;
21
22 $self->{"infodir"} = $cnf->{_}->{infodir};
23 $self->{"suffix"} = "info";
24
25 $self->loadAnchor($name) if defined $name;
26
27 return $self;
28 }
29
30 sub saveLogMode($) {
31 my $self = shift;
32 return 0 unless defined $self;
33 $self->{"preserve_warnings"} = $::log->getwarnings;
34 $self->{"preserve_errors"} = $::log->geterrors;
35 return 1;
36 }
37
38 sub setLogMode($) {
39 my $self = shift;
40 return 0 unless defined $self;
41 $self->{"nowarnings"} and $::log->setwarnings(0);
42 $self->{"noerrors"} and $::log->seterrors(0);
43 return 1;
44 }
45
46 sub restoreLogMode($) {
47 my $self = shift;
48 return 0 unless defined $self;
49 $self->{"preserve_warnings"} and $self->{"preserve_errors"} or
50 die "Internal error: restoreLogMode called without previous save\n";
51 $::log->setwarnings($self->{"preserve_warnings"});
52 $::log->seterrors($self->{"preserve_errors"});
53 return 1;
54 }
55
56 sub getInfodir($$) {
57 my $self = shift;
58 my ($path) = shift;
59 return 0 unless defined $self;
60
61 return $self->{"infodir"};
62 }
63
64 sub setInfodir($$) {
65 my $self = shift;
66 my ($path) = shift;
67 return 0 unless defined $path and defined $self;
68
69 -e $path or
70 $::log->err("setInfodir: path $path does not exist") and return 0;
71 -d $path or
72 $::log->err("setInfodir: path $path is not a directory") and return 0;
73
74 $self->{"infodir"} = $path;
75
76 return 1;
77 }
78
79
80 sub loadAnchor($$) {
81 my $self = shift;
82 my ($name) = @_;
83 return 0 unless defined $name;
84
85 $::log->verb(1,"Initializing trust anchor $name");
86
87 my ( $basename, $path, $suffix) = fileparse($name,('.info','.crl_url'));
88
89 $path = "" if $path eq "./" and substr($name,0,length($path)) ne $path ;
90
91 $::log->err("Invalid name of trust anchor $name") and return 0
92 unless $basename;
93
94 $self->{"infodir"} = $path if $path ne "";
95 $path = $self->{"infodir"} || "";
96 $path and $path .= "/" unless $path =~ /\/$/;
97
98 if ( $suffix ) {
99 -e $name or
100 $::log->err("Trust anchor data $name not found") and return 0;
101 } else { # try and guess which suffix should be used
102 ($suffix eq "" and -e $path.$basename.".info" ) and $suffix = ".info";
103 ($suffix eq "" and -e $path.$basename.".crl_url" ) and $suffix = ".crl_url";
104 $suffix or
105 $::log->err("No trust anchor metadata for $basename in '$path'")
106 and return 0;
107 }
108
109 if ( $suffix eq ".crl_url" ) {
110
111 $self->{"alias"} = $basename;
112 @{$self->{"crlurls"}} = ();
113 open CRLURL,"$path$basename$suffix" or
114 $::log->err("Error reading crl_url $path$basename$suffix: $!") and return 0;
115 my $urllist;
116 while (<CRLURL>) {
117 /^\s*([^#\n]+).*$/ and my $url = $1 or next;
118 $url =~ s/\s*$//; # trailing whitespace is ignored
119
120 $url =~ /^\w+:\/\/.*$/ or
121 $::log->err("File $path$basename$suffix contains a non-URL entry")
122 and close CRLURL and return 0;
123
124 $urllist and $urllist .= "";
125 $urllist .= $url;
126 }
127 close CRLURL;
128 push @{$self->{"crlurls"}}, $urllist;
129 $self->{"status"} ||= "unknown";
130
131 } else {
132
133 my $info = ConfigTiny->new();
134 $info->read( $path . $basename . $suffix ) or
135 $::log->err("Error reading info $path$basename$suffix", $info->errstr)
136 and return 0;
137
138 $info->{_}->{"crl_url"} and $info->{_}->{"crl_url.0"} and
139 $::log->err("Invalid info for $basename: crl_url and .0 duplicate") and
140 return 0;
141 $info->{_}->{"crl_url"} and
142 $info->{_}->{"crl_url.0"} = $info->{_}->{"crl_url"};
143
144 # only do something when there is actually a CRL to process
145 $info->{_}->{"crl_url.0"} or
146 $::log->verb(1,"Trust anchor $basename does not have a CRL") and return 0;
147
148 $info->{_}->{"alias"} or
149 $::log->err("Invalid info for $basename: no alias") and
150 return 0;
151 $self->{"alias"} = $info->{_}->{"alias"};
152
153 @{$self->{"crlurls"}} = ();
154 for ( my $i=0 ; defined $info->{_}{"crl_url.".$i} ; $i++ ) {
155 $info->{_}{"crl_url.".$i} =~ s/[;\s]+//g;
156 $info->{_}{"crl_url.".$i} =~ s/^\s*([^\s]*)\s*$/$1/;
157
158 $info->{_}{"crl_url.".$i} =~ /^\w+:\/\// or
159 $::log->err("File $path$basename$suffix contains a non-URL entry",
160 $info->{_}{"crl_url.".$i})
161 and close CRLURL and return 0;
162
163 push @{$self->{"crlurls"}} , $info->{_}{"crl_url.".$i};
164 }
165
166 foreach my $field ( qw/email ca_url status/ ) {
167 $self->{$field} = $info->{_}->{$field} if $info->{_}->{$field};
168 }
169
170 # status of CA is only knwon for info-file based CAs
171 $self->{"status"} ||= "local";
172
173 }
174
175 # preserve basename of file for config and diagnostics
176 $self->{"anchorname"} = $basename;
177
178 #
179 # set defaults for common values
180 foreach my $key ( qw /
181 prepend_url postpend_url agingtolerance
182 httptimeout proctimeout
183 nowarnings noerrors nocache http_proxy
184 nametemplate_der nametemplate_pem
185 cadir catemplate statedir
186 / ) {
187 $self->{$key} =
188 $::cnf->{$self->{"alias"}}->{$key} ||
189 $::cnf->{$self->{"anchorname"}}->{$key} ||
190 $::cnf->{_}->{$key} or delete $self->{$key};
191 defined $self->{$key} and do {
192 $self->{$key} =~ s/\@ANCHORNAME\@/$self->{"anchorname"}/g;
193 $self->{$key} =~ s/\@STATUS\@/$self->{"status"}/g;
194 $self->{$key} =~ s/\@ALIAS\@/$self->{"alias"}/g;
195 };
196 }
197 # reversible toggle options
198 foreach my $key ( qw / warnings errors cache / ) {
199 delete $self->{"no$key"} if $::cnf->{$self->{"alias"}}->{$key} or
200 $::cnf->{$self->{"anchorname"}}->{$key} or
201 $::cnf->{_}->{$key};
202 }
203 foreach my $key ( qw / nohttp_proxy noprepend_url nopostpend_url
204 nostatedir / ) {
205 (my $nokey = $key) =~ s/^no//;
206 delete $self->{"$nokey"} if $::cnf->{$self->{"alias"}}->{$key} or
207 $::cnf->{$self->{"anchorname"}}->{$key} or
208 $::cnf->{_}->{$key};
209 }
210
211 # overriding of the URLs (alias takes precedence over anchorname
212 foreach my $section ( qw / anchorname alias / ) {
213 my $i = 0;
214 while ( defined ($::cnf->{$self->{$section}}->{"crl_url.".$i}) ) {
215 my $urls;
216 ($urls=$::cnf->{$self->{$section}}->{"crl_url.".$i} )=~s/[;\s]+//g;
217 ${$self->{"crlurls"}}[$i] = $urls;
218 $i++;
219 }
220 }
221
222 # templates to construct a CA name may still have other separators
223 $self->{"catemplate"} =~ s/[;\s]+//g;
224
225 # select only http/https/ftp/file URLs
226 # also transform the URLs using the base patterns and prepend any
227 # local URL patterns (@ANCHORNAME@, @ALIAS@, and @R@)
228 for ( my $i=0; $i <= $#{$self->{"crlurls"}} ; $i++ ) {
229 my $urlstring = @{$self->{"crlurls"}}[$i];
230 my @urls = split(//,$urlstring);
231 $urlstring="";
232 foreach my $url ( @urls ) {
233 if ( $url =~ /^(http:|https:|ftp:|file:)/ ) {
234 $urlstring.="" if $urlstring; $urlstring.=$url;
235 } else {
236 $::log->verb(0,"URL $url in $basename$suffix unsupported, ignored");
237 }
238 }
239 if ( my $purl = $self->{"prepend_url"} ) {
240 $purl =~ s/\@R\@/$i/g;
241 $urlstring = join "" , $purl , $urlstring;
242 }
243 if ( my $purl = $self->{"postpend_url"} ) {
244 $purl =~ s/\@R\@/$i/g;
245 $urlstring = join "" , $urlstring, $purl;
246 }
247 if ( ! $urlstring ) {
248 $::log->err("No usable CRL URLs for",$self->getAnchorName);
249 $self->{"crlurls"}[$i] = "";
250 } else {
251 $self->{"crlurls"}[$i] = $urlstring;
252 }
253 }
254
255 return 1;
256 }
257
258 sub getAnchorName($) {
259 my $self = shift;
260 return ($self->{"anchorname"} || undef);
261 }
262
263 sub printAnchorName($) {
264 my $self = shift;
265 print "" . ($self->{"anchorname"} || "undefined") ."\n";
266 }
267
268 sub loadCAfiles($) {
269 my $self = shift;
270 my $idx = 0;
271
272 -d $self->{"cadir"} or
273 $::log->err("CA directory",$self->{"cadir"},"does not exist") and
274 return 0;
275
276 @{$self->{"cafile"}} = ();
277 do {
278 my $cafile;
279 foreach my $catpl ( split //, $self->{"catemplate"} ) {
280 $catpl =~ s/\@R\@/$idx/g;
281 -e $self->{"cadir"}.'/'.$catpl and
282 $cafile = $self->{"cadir"}.'/'.$catpl and last;
283 }
284 defined $cafile or do {
285 $idx or do $::log->err("Cannot find any CA for",
286 $self->{"alias"},"in",$self->{"cadir"});
287 return $idx?1:0;
288 };
289 push @{$self->{"cafile"}}, $cafile;
290 $::log->verb(3,"Added CA file $idx: $cafile");
291 } while(++$idx);
292 return 0; # you never should come here
293 }
294
295
296 sub loadState($$) {
297 my $self = shift;
298 my $fallbackmode = shift;
299
300 $self->{"crlurls"} or
301 $::log->err("loading state for uninitialised list of CRLs") and return 0;
302 $self->{"alias"} or
303 $::log->err("loading state for uninitialised trust anchor") and return 0;
304
305 for ( my $i = 0; $i <= $#{$self->{"crlurls"}} ; $i++ ) { # all indices
306 if ( $self->{"statedir"} and
307 -e $self->{"statedir"}.'/'.$self->{"alias"}.'.'.$i.'.state'
308 ) {
309 my $state = ConfigTiny->new();
310 $state->read($self->{"statedir"}.'/'.$self->{"alias"}.'.'.$i.'.state')
311 or $::log->err("Cannot read existing state file",
312 $self->{"statedir"}.'/'.$self->{"alias"}.'.$i.state',
313 " - ",$state->errstr) and return 0;
314 foreach my $key ( keys %{$state->{$self->{"alias"}}} ) {
315 $self->{"crl"}[$i]{"state"}{$key} = $state->{$self->{"alias"}}->{$key};
316 }
317 }
318
319 # fine, but we should find at least an mtime if at all possible
320 # make sure it is there:
321 # try to retrieve state from installed files in @output_
322 # where the first look-alike CRL will win. NSS databases
323 # are NOT supported for this heuristic
324 if ( ! defined $self->{"crl"}[$i]{"state"}{"mtime"} ) {
325 my $mtime;
326 STATEHUNT: foreach my $output ( @{$::cnf->{_}->{"output_"}} ) {
327 foreach my $file (
328 $self->{"nametemplate_der"},
329 $self->{"nametemplate_pem"},
330 $self->{"alias"}.".r\@R\@",
331 $self->{"anchorname"}.".r\@R\@",
332 ) {
333 next unless $file;
334 $file =~ s/\@R\@/$i/g;
335 $file = join "/", $output, $file;
336 next if ! -e $file;
337 $mtime = (stat(_))[9];
338 last STATEHUNT;
339 }
340 }
341 $::log->verb(3,"Inferred mtime for",$self->{"alias"},"is",$mtime) if $mtime;
342 $self->{"crl"}[$i]{"state"}{"mtime"} = $mtime if $mtime;
343 }
344 }
345 return 1;
346 }
347
348 sub saveState($$) {
349 my $self = shift;
350 my $fallbackmode = shift;
351
352 $self->{"statedir"} and -d $self->{"statedir"} and -w $self->{"statedir"} or
353 return 0;
354
355 $self->{"crlurls"} or
356 $::log->err("loading state for uninitialised list of CRLs") and return 0;
357 $self->{"alias"} or
358 $::log->err("loading state for uninitialised trust anchor") and return 0;
359
360 # of state, mtime is set based on CRL write in $output and filled there
361 for ( my $i = 0; $i <= $#{$self->{"crlurls"}} ; $i++ ) { # all indices
362 if ( defined $self->{"statedir"} and
363 -d $self->{"statedir"}
364 ) {
365 my $state = ConfigTiny->new;
366 foreach my $key ( keys %{$self->{"crl"}[$i]{"state"}} ) {
367 $state->{$self->{"alias"}}->{$key} = $self->{"crl"}[$i]{"state"}{$key};
368 }
369 $state->write(
370 $self->{"statedir"}.'/'.$self->{"alias"}.'.'.$i.'.state' );
371 $::log->verb(5,"State saved in",
372 $self->{"statedir"}.'/'.$self->{"alias"}.'.'.$i.'.state');
373 }
374
375 }
376 return 1;
377 }
378
379 sub retrieveHTTP($$) {
380 my $self = shift;
381 my $idx = shift;
382 my $url = shift;
383 my %metadata;
384 my $data;
385
386 $url =~ /^(http:|https:|ftp:)/ or die "retrieveHTTP: non-http URL $url\n";
387
388 $::log->verb(3,"Downloading data from $url");
389 my $ua = LWP::UserAgent->new;
390 $ua->agent('fetch-crl/'.$::cnf->{_}->{version} . ' ('.
391 $ua->agent . '; '.$::cnf->{_}->{packager} . ')'
392 );
393 $ua->timeout($self->{"httptimeout"});
394 $ua->use_eval(0);
395 if ( $self->{"http_proxy"} ) {
396 if ( $self->{"http_proxy"} =~ /^ENV/i ) {
397 $ua->env_proxy();
398 } else {
399 $ua->proxy("http", $self->{"http_proxy"});
400 }
401 }
402
403
404 # see with a HEAD request if we can get by with old data
405 # but to assess that we need Last-Modified from the previous request
406 # (so if the CA did not send that: too bad)
407 if ( $self->{"crl"}[$idx]{"state"}{"lastmod"} and
408 $self->{"crl"}[$idx]{"state"}{"b64data"}
409 ) {
410 $::log->verb(4,"Lastmod set to",$self->{"crl"}[$idx]{"state"}{"lastmod"});
411 $::log->verb(4,"Attemping HEAD retrieval of $url");
412
413 my $response;
414 eval {
415 local $SIG{ALRM}=sub{die "timed out after ".$self->{"httptimeout"}."s\n";};
416 alarm $self->{"httptimeout"};
417 $response = $ua->head($url);
418 alarm 0;
419 };
420 alarm 0; # make sure the alarm stops ticking, regardless of the eval
421
422 if ( $@ ) {
423 $::log->verb(2,"HEAD error $url:", $@);
424 return undef;
425 }
426
427 # try get if head fails anyway
428 if ( ( ! $@ ) and
429 $response->is_success and
430 $response->header("Last-Modified") ) {
431
432 my $lastmod = HTTP::Date::str2time($response->header("Last-Modified"));
433 if ( $lastmod == $self->{"crl"}[$idx]{"state"}{"lastmod"}) {
434 $::log->verb(4,"HEAD lastmod unchanged, using cache");
435 $data = base64::b64decode($self->{"crl"}[$idx]{"state"}{"b64data"});
436 %metadata = (
437 "freshuntil" => $response->fresh_until(heuristic_expiry=>0)||time,
438 "lastmod" => $self->{"crl"}[$idx]{"state"}{"lastmod"} || time,
439 "sourceurl" => $self->{"crl"}[$idx]{"state"}{"sourceurl"} || $url
440 );
441 return ($data,%metadata) if wantarray;
442 return $data;
443
444 } elsif ( $lastmod < $self->{"crl"}[$idx]{"state"}{"lastmod"} ) {
445 # retrieve again, but print warning abount this wierd behaviour
446 $::log->warn("Retrieved HEAD Last-Modified is older than cache: ".
447 "cache invalidated, GET issued");
448 }
449 }
450 }
451
452 # try get if head fails anyway
453
454 my $response;
455 eval {
456 local $SIG{ALRM}=sub{die "timed out after ".$self->{"httptimeout"}."s\n";};
457 alarm $self->{"httptimeout"};
458 $response = $ua->get($url);
459 alarm 0;
460 };
461 alarm 0; # make sure the alarm stops ticking, regardless of the eval
462
463 if ( $@ ) {
464 chomp($@);
465 $::log->verb(0,"Download error $url:", $@);
466 return undef;
467 }
468
469 if ( ! $response->is_success ) {
470 $::log->verb(0,"Download error $url:",$response->status_line);
471 return undef;
472 }
473
474 $data = $response->content;
475
476 $metadata{"freshuntil"}=$response->fresh_until(heuristic_expiry=>0)||time;
477 if ( my $lastmod = $response->header("Last-Modified") ) {
478 $metadata{"lastmod"} = HTTP::Date::str2time($lastmod);
479 }
480 $metadata{"sourceurl"} = $url;
481
482 return ($data,%metadata) if wantarray;
483 return $data;
484 }
485
486 sub retrieveFile($$) {
487 my $self = shift;
488 my $idx = shift;
489 my $url = shift;
490 $url =~ /^file:\/*(\/.*)$/ or die "retrieveFile: non-file URL $url\n";
491 $::log->verb(4,"Retrieving data from $url");
492
493 # for files the previous state does not matter, we retrieve it
494 # anyway
495
496 my $data;
497 {
498 open CRLFILE,$1 or do {
499 $! = "Cannot open $1: $!";
500 return undef;
501 };
502 binmode CRLFILE;
503 local $/;
504 $data = <CRLFILE>;
505 close CRLFILE;
506 }
507
508 my %metadata;
509 $metadata{"lastmod"} = (stat($1))[9];
510 $metadata{"freshuntil"} = time;
511 $metadata{"sourceurl"} = $url;
512
513 return ($data,%metadata) if wantarray;
514 return $data;
515 }
516
517 sub retrieve($) {
518 my $self = shift;
519
520 $self->{"crlurls"} or
521 $::log->err("Retrieving uninitialised list of CRL URLs") and return 0;
522
523 $::log->verb(2,"Retrieving CRLs for",$self->{"alias"});
524
525 for ( my $i = 0; $i <= $#{$self->{"crlurls"}} ; $i++ ) { # all indices
526 my ($result,%response);
527
528 $::log->verb(3,"Retrieving CRL for",$self->{"alias"},"index $i");
529
530 # within the list of CRL URLs for a specific index, all entries
531 # are considered equivalent. I.e., if we get one, the metadata will
532 # be used for all (like Last-Modified, and cache control data)
533
534 # if we have a cached piece of fresh data, return that one
535 if ( ($self->{"crl"}[$i]{"state"}{"freshuntil"} || 0) > time and
536 $self->{"crl"}[$i]{"state"}{"b64data"} ) {
537 $::log->verb(3,"Using cached content for",$self->{"alias"},"index",$i);
538 $::log->verb(4,"Content dated",
539 scalar gmtime($self->{"crl"}[$i]{"state"}{"lastmod"}),
540 "valid until",
541 scalar gmtime($self->{"crl"}[$i]{"state"}{"freshuntil"}),
542 "UTC");
543 $result = base64::b64decode($self->{"crl"}[$i]{"state"}{"b64data"});
544 %response = (
545 "freshuntil" => $self->{"crl"}[$i]{"state"}{"freshuntil"} || time,
546 "lastmod" => $self->{"crl"}[$i]{"state"}{"lastmod"} || time,
547 "sourceurl" => $self->{"crl"}[$i]{"state"}{"sourceurl"} || "null:"
548 );
549 } else {
550 foreach my $url ( split(//,$self->{"crlurls"}[$i]) ) {
551 # of these, the first one wins
552 $url =~ /^(http:|https:|ftp:)/ and
553 ($result,%response) = $self->retrieveHTTP($i,$url);
554 $url =~ /^(file:)/ and
555 ($result,%response) = $self->retrieveFile($i,$url);
556 last if $result;
557 }
558 }
559
560 # check if result is there, otherwise invoke agingtolerance clause
561 # before actually raising this as an error
562 # note that agingtolerance stats counting only AFTER the freshness
563 # of the cache control directives has passed ...
564
565 if ( ! $result ) {
566
567 $::log->verb(1,"CRL retrieval for",
568 $self->{"alias"},($i?"[$i] ":"")."failed from all URLs");
569
570 if ( $self->{"agingtolerance"} && $self->{"crl"}[$i]{"state"}{"mtime"} ) {
571 if ( ( time - $self->{"crl"}[$i]{"state"}{"mtime"} ) <
572 3600*$self->{"agingtolerance"}) {
573 $::log->warn("CRL retrieval for",
574 $self->{"alias"},($i?"[$i] ":"")."failed,",
575 int((3600*$self->{"agingtolerance"}+
576 $self->{"crl"}[$i]{"state"}{"mtime"}-
577 time )/3600).
578 " left of ".$self->{"agingtolerance"}."h, retry later.");
579 } else {
580 $::log->err("CRL retrieval for",
581 $self->{"alias"},($i?"[$i] ":"")."failed.",
582 $self->{"agingtolerance"}."h grace expired.",
583 "CRL not updated");
584 }
585 } else { # direct errors, no tolerance anymore
586 $::log->err("CRL retrieval for",
587 $self->{"alias"},($i?"[$i] ":"")."failed,",
588 "CRL not updated");
589 }
590 next; # next subindex CRL for same CA, no further action on this one
591 }
592
593 # now data for $i is loaded in $result;
594 # for freshness checks, take a sum (SysV style)
595 my $sum = unpack("%32C*",$result) % 65535;
596
597 $::log->verb(4,"Got",length($result),"bytes of data (sum=$sum)");
598
599 $self->{"crl"}[$i]{"data"} = $result;
600 $self->{"crl"}[$i]{"state"}{"alias"} = $self->{"alias"};
601 $self->{"crl"}[$i]{"state"}{"index"} = $i;
602 $self->{"crl"}[$i]{"state"}{"sum"} = $sum;
603 ($self->{"crl"}[$i]{"state"}{"b64data"} =
604 base64::b64encode($result)) =~ s/\s+//gm;
605
606 $self->{"crl"}[$i]{"state"}{"retrievaltime"} = time;
607 $self->{"crl"}[$i]{"state"}{"sourceurl"} = $response{"sourceurl"}||"null:";
608 $self->{"crl"}[$i]{"state"}{"freshuntil"} =
609 ($self->{"nocache"}? 0 : $response{"freshuntil"}||time);
610 $self->{"crl"}[$i]{"state"}{"lastmod"} = $response{"lastmod"}||time;
611
612 }
613 return 1;
614 }
615
616 sub verifyAndConvertCRLs($) {
617 my $self = shift;
618 $self->{"crlurls"} or
619 $::log->err("Verifying uninitialised list of CRLs impossible") and return 0;
620
621 # all CRLs must be valid in order to proceed
622 # or we would end up shifting the relative ordering around and
623 # possibly creatiing holes (or overwriting good local copies of
624 # CRLs that have gone bad on the remote end
625
626 for ( my $i = 0; $i <= $#{$self->{"crlurls"}} ; $i++ ) { # all indices
627 $self->{"crlurls"}[$i] or
628 $::log->verb(3,"CRL",$self->getAnchorName."/".$i,"ignored (no valid URL)")
629 and next;
630 $self->{"crl"}[$i]{"data"} or
631 $::log->verb(3,"CRL",$self->getAnchorName."/".$i,"ignored (no new data)")
632 and next;
633 $::log->verb(4,"Verifying CRL $i for",$self->getAnchorName);
634
635 my $crl = CRL->new($self->getAnchorName."/$i",$self->{"crl"}[$i]{"data"});
636 my @verifyMessages= $crl->verify(@{$self->{"cafile"}});
637
638 # do additional checks on correlation between download and current
639 # lastUpdate of current file? have to guess the current file
640 # unless we are stateful!
641 my $oldlastupdate = $self->{"crl"}[$i]{"state"}{"lastupdate"} || undef;
642 $oldlastupdate or do {
643 $::log->verb(6,"Attempting to extract lastUpdate of previous D/L");
644 CRLSTATEHUNT: foreach my $output ( @{$::cnf->{_}->{"output_"}} ,
645 $self->{"infodir"}
646 ) {
647 foreach my $file (
648 $self->{"nametemplate_der"},
649 $self->{"nametemplate_pem"},
650 $self->{"alias"}.".r\@R\@",
651 $self->{"anchorname"}.".r\@R\@",
652 ) {
653 next unless $file;
654 (my $thisfile = $file ) =~ s/\@R\@/$i/g;
655 $thisfile = join "/", $output, $thisfile;
656 $::log->verb(6,"Trying guess $file for old CRL");
657 next if ! -e $thisfile;
658 my $oldcrldata; {
659 open OCF,$thisfile and do {
660 binmode OCF;
661 local $/;
662 $oldcrldata = <OCF>;
663 close OCF;
664 }
665 }
666 my $oldcrl = CRL->new($thisfile,$oldcrldata);
667 $oldlastupdate = $oldcrl->getLastUpdate;
668 last CRLSTATEHUNT;
669 }
670 }
671 $::log->verb(3,"Inferred lastupdate for",$self->{"alias"},"is",
672 $oldlastupdate) if $oldlastupdate;
673 };
674
675 if ( ! $crl->getLastUpdate ) {
676 push @verifyMessages,"downloaded CRL lastUpdate could not be derived";
677 } elsif ( $oldlastupdate and ($crl->getLastUpdate < $oldlastupdate) and
678 ($self->{"crl"}[$i]{"state"}{"mtime"} < time)
679 ) {
680 push @verifyMessages,"downloaded CRL lastUpdate predates installed CRL,",
681 "and current version has sane timestamp";
682 } elsif ( defined $oldlastupdate and $oldlastupdate > time ) {
683 $::log->warn($self->{"anchorname"}."/$i:","replaced with downloaded CRL",
684 "since current one has lastUpdate in the future");
685 }
686
687 $#verifyMessages >= 0 and do {
688 $::log->err("CRL verification failed for",$self->{"anchorname"}."/$i",
689 "(".$self->{"alias"}.")");
690 foreach my $m ( @verifyMessages ) {
691 $::log->verb(0,$self->{"anchorname"}."/$i:",$m);
692 }
693 return 0;
694 };
695
696 $self->{"crl"}[$i]{"pemdata"} = $crl->getPEMdata();
697 foreach my $key ( qw/ lastupdate nextupdate sha1fp issuer / ) {
698 $self->{"crl"}[$i]{"state"}{$key} = $crl->getAttribute($key) || "";
699 }
700 }
701 return 1;
702 }
703
704
705 1;
706

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