/[pdpsoft]/nl.nikhef.pdp.fetchcrl/tags/fetch-crl-3.0.8-1/CRLWriter.pm
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Revision 1758 - (hide annotations) (download) (as text)
Fri Jun 11 15:39:04 2010 UTC (11 years, 5 months ago) by davidg
Original Path: fetchcrl/CRLWriter.pm
File MIME type: application/x-perl
File size: 10438 byte(s)
Initial import of fetch-crl3

1 davidg 1758 #
2     # @(#)$Id$
3     #
4     # ###########################################################################
5     #
6     #
7     # Syntax:
8     # CRLWriter->new( [name [,index]] );
9     # CRLWriter->setTA( trustanchor );
10     # CRLWriter->setIndex( index );
11     #
12     package CRLWriter;
13     use strict;
14     use File::Basename;
15     use File::Temp qw/ tempfile /;
16     require OSSL and import OSSL unless defined &OSSL::new;
17     require base64 and import base64 unless defined &base64::b64encode;
18     use vars qw/ $log $cnf /;
19    
20     sub new {
21     my $obref = {}; bless $obref;
22     my $self = shift;
23     $self = $obref;
24     my $name = shift;
25     my $index = shift;
26    
27     $self->setTA($name) if defined $name;
28     $self->setIndex($name) if defined $index;
29    
30     return $self;
31     }
32    
33    
34     sub getName($) {
35     my $self = shift;
36     return 0 unless defined $self;
37     return $self->{"ta"}->getAnchorName;
38     }
39    
40     sub setTA($$) {
41     my $self = shift;
42     my ($ta) = shift;
43     return 0 unless defined $ta and defined $self;
44     $ta->{"anchorname"} or
45     $::log->err("CRLWriter::setTA called without uninitialised trust anchor")
46     and return 0;
47     $self->{"ta"} = $ta;
48     return 1;
49     }
50    
51     sub setIndex($$) {
52     my $self = shift;
53     my ($index) = shift;
54     return 0 unless defined $self;
55     $self->{"ta"} or
56     $::log->err("CRLWriter::setIndex called without a loaded TA") and
57     return 0;
58     my $ta = $self->{"ta"};
59    
60     $ta->{"crlurls"} or
61     $::log->err("CRLWriter::setIndex called with uninitialised TA") and
62     return 0;
63    
64     ! defined $index and delete $self->{"index"} and return 1;
65    
66     $index < 0 and
67     $::log->err("CRLWriter::setIndex called with invalid index $index") and
68     return 0;
69     $index > $#{$ta->{"crlurls"}} and
70     $::log->err("CRLWriter::setIndex index $index too large") and
71     return 0;
72    
73     $self->{"index"} = $index;
74    
75     return 1;
76     }
77    
78     sub updatefile($$%) {
79     my $file = shift;
80     my $content = shift;
81     my %flags = @_;
82     $content or return undef;
83     $file or
84     $::log->err("Cannot write content to undefined path") and return undef;
85    
86     my ( $basename, $path, $suffix ) = fileparse($file);
87    
88     # get content and do a comparison. If data identical, touch only
89     # to update mtime (other tools like NGC Nagios use this mtime semantics)
90     #
91     my $olddata;
92     my $mytime;
93     -f $file and do {
94     $mytime = (stat(_))[9];
95     {
96     open OLDFILE,'<',$file or
97     $::log->err("Cannot make backup of $file: $!") and return undef;
98     binmode OLDFILE; local $/;
99     $olddata = <OLDFILE>; close OLDFILE;
100     }
101     };
102     if ( $flags{"BACKUP"} and $olddata ) {
103     if ( -w $path ) {
104     -e "$file~" and ( unlink "$file~" or
105     $::log->warn("Cannot remove old backup $file~: $!") and return undef);
106     if (open BCKFILE,'>',"$file~" ) {
107     print BCKFILE $olddata;
108     close BCKFILE;
109     utime $mytime,$mytime, "$file~";
110     } else {
111     $::log->warn("Cannot reate backup $file~: $!");
112     }
113     } else {
114     $::log->warn("Cannot make backup, $path not writable");
115     }
116     }
117    
118     defined $olddata and $olddata eq $content and do {
119     $::log->verb(4,"$file unchanged - touch only");
120     utime time,time,$file and return 1;
121     $::log->warn("Touch of $file failed, CRL unmodified");
122     return 0;
123     };
124    
125     if ( open FH,'>',$file ) {
126     print FH $content or
127     $::log->err("Write to $file: $!") and return undef;
128     close FH or
129     $::log->err("Close on write of $file: $!") and return undef;
130     } else { # something went wrong in opening the file for write,
131     # so try and restore backup if that was selected
132     $::log->err("Open for write of $file: $!");
133     $flags{"BACKUP"} and ! -s "$file" and -s "$file~" and do {
134     #file has been clobbed, but backup OK
135     unlink "$file" and link "$file~","$file" and unlink "$file~" or
136     $::log->err("Restore of backup $file failed: $!");
137     };
138     return undef;
139     }
140     return 1;
141     }
142    
143     sub writePEM($$$$) {
144     my $self = shift;
145     my $idx = shift;
146     my $data = shift;
147     my $ta = shift;
148     defined $idx and $data and $ta or
149     $::log->err("CRLWriter::writePEM: missing index or data") and return 0;
150    
151     my $output = $::cnf->{_}->{"output"};
152     $output = $::cnf->{_}->{"output_pem"} if defined $::cnf->{_}->{"output_pem"};
153     $output and -d $output or
154     $::log->err("PEM target directory $output invalid") and return 0;
155    
156     my $filename = "$output/".$ta->{"nametemplate_pem"};
157     $filename =~ s/\@R\@/$idx/g;
158    
159     my %flags = ();
160     $::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1;
161    
162     $::log->verb(3,"Writing PEM file",$filename);
163     &updatefile($filename,$data,%flags) or return 0;
164     return 1;
165     }
166    
167     sub writeDER($$$$) {
168     my $self = shift;
169     my $idx = shift;
170     my $data = shift;
171     my $ta = shift;
172     defined $idx and $data and $ta or
173     $::log->err("CRLWriter::writeDER: missing index or data") and return 0;
174    
175     my $output = $::cnf->{_}->{"output"};
176     $output = $::cnf->{_}->{"output_der"} if defined $::cnf->{_}->{"output_der"};
177     $output and -d $output or
178     $::log->err("DER target directory $output invalid") and return 0;
179    
180     my $filename = "$output/".$ta->{"nametemplate_der"};
181     $filename =~ s/\@R\@/$idx/g;
182    
183     my %flags = ();
184     $::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1;
185    
186     my $openssl=OSSL->new();
187     my ($der,$errors) = $openssl->Exec3($data,qw/crl -inform PEM -outform DER/);
188     $errors or not $der and
189     $::log->err("Data count not be converted to DER: $errors") and return 0;
190    
191     $::log->verb(3,"Writing DER file",$filename);
192     &updatefile($filename,$der,%flags) or return 0;
193     return 1;
194     }
195    
196     sub writeOpenSSL($$$$) {
197     my $self = shift;
198     my $idx = shift;
199     my $data = shift;
200     my $ta = shift;
201     defined $idx and $data and $ta or
202     $::log->err("CRLWriter::writeOpenSSL: missing index, data or ta") and
203     return 0;
204    
205     my $output = $::cnf->{_}->{"output"};
206     $output = $::cnf->{_}->{"output_openssl"} if
207     defined $::cnf->{_}->{"output_openssl"};
208     $output and -d $output or
209     $::log->err("OpenSSL target directory $output invalid") and return 0;
210    
211     my $openssl=OSSL->new();
212    
213     # guess the hash name or names from OpenSSL
214     # if mode is dual (and OpenSSL1 installed) write two files
215     my $opensslversion = $openssl->getVersion() or return 0;
216    
217     my ($cmddata,$errors);
218     my @hashes = ();
219     if ( $opensslversion ge "1" and $::cnf->{_}->{"opensslmode"} eq "dual" ) {
220     $::log->verb(5,"OpenSSL version 1 dual-mode enabled");
221     # this mode needs the ta cafile to get both hashes, since these
222     # can only be extracted by the x509 subcommand from a CA ...
223     ($cmddata,$errors) = $openssl->Exec3(undef,
224     qw/x509 -noout -subject_hash -subject_hash_old -in/,
225     $ta->{"cafile"}[0]);
226     $cmddata or
227     $::log->err("OpenSSL cannot extract hashes from",$ta->{"cafile"}[0]) and
228     return 0;
229     @hashes = split(/[\s\n]+/,$cmddata);
230     } else {
231     $::log->verb(5,"OpenSSL version 1 single-mode or pre-1.0 style");
232     ($cmddata,$errors) = $openssl->Exec3($data,qw/crl -noout -hash/);
233     $cmddata or
234     $::log->err("OpenSSL cannot extract hashes from CRL for",
235     $ta->{"alias"}.'/'.$idx
236     ) and
237     return 0;
238     @hashes = split(/[\s\n]+/,$cmddata);
239     }
240    
241     my %flags = ();
242     $::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1;
243    
244     foreach my $hash ( @hashes ) {
245     my $filename = "$output/$hash.r$idx";
246     $::log->verb(3,"Writing OpenSSL file",$filename);
247     &updatefile($filename,$data,%flags) or return 0;
248     }
249     return 1;
250     }
251    
252     sub writeNSS($$$$) {
253     my $self = shift;
254     my $idx = shift;
255     my $data = shift;
256     my $ta = shift;
257     defined $idx and $data and $ta or
258     $::log->err("CRLWriter::writeNSS: missing index, data or ta") and return 0;
259    
260     my $output = $::cnf->{_}->{"output"};
261     $output = $::cnf->{_}->{"output_nss"} if defined $::cnf->{_}->{"output_nss"};
262     $output and -d $output or
263     $::log->err("NSS target directory $output invalid") and return 0;
264    
265     my $dbprefix="";
266     $dbprefix = $::cnf->{_}->{"nssdbprefix"}
267     if defined $::cnf->{_}->{"nssdbprefix"};
268    
269     my $filename = "$output/$dbprefix";
270    
271     # the crlutil tool requires the DER formatted cert in a file
272     my $tmpdir = $::cnf->{_}->{exec3tmpdir} || $ENV{"TMPDIR"} || '/tmp';
273     my ($derfh,$dername) = tempfile("fetchcrl3der.XXXXXX",
274     DIR=>$tmpdir, UNLINK=>1);
275     (my $b64data = $data) =~ s/-[^\n]+//gm;
276     $b64data =~ s/\s+//gm;
277     print $derfh base64::b64decode($b64data); # der is decoded PEM :-)
278    
279     my $cmd = "crlutil -I -d \"$output\" -P \"$dbprefix\" ";
280     $::cnf->{_}->{nonssverify} and $cmd .= "-B ";
281     $cmd .= "-n ".$ta->{"alias"}.'.'.$idx." ";
282     $cmd .= "-i \"$dername\"";
283     my $result = `$cmd 2>&1`;
284     unlink $dername;
285     if ( $? != 0 ) {
286     $::log->err("Cannot update NSSDB filename: $result");
287     } else {
288     $::log->verb(3,"WriteNSS: ".$ta->{"alias"}.'.'.$idx." added to $filename");
289     }
290    
291     return 1;
292     }
293    
294    
295     sub writeall($) {
296     my $self = shift;
297     return 0 unless defined $self;
298     $self->{"ta"} or
299     $::log->err("CRLWriter::setIndex called without a loaded TA") and
300     return 0;
301     my $ta = $self->{"ta"};
302     $ta->{"crlurls"} or
303     $::log->err("CRLWriter::setIndex called with uninitialised TA") and
304     return 0;
305    
306     $::log->verb(2,"Writing CRLs for",$ta->{"anchorname"});
307    
308     my $completesuccess = 1;
309     for ( my $idx = 0 ; $idx <= $#{$ta->{"crl"}} ; $idx++ ) {
310     $ta->{"crl"}[$idx]{"pemdata"} or
311     $::log->verb(3,"Ignored CRL $idx skipped") and
312     next; # ignore empty crls, leave these in place
313    
314     my $writeAttempt = 0;
315     my $writeSuccess = 0;
316    
317     ( grep /^pem$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and
318     $writeSuccess += $self->writePEM($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta);
319    
320     ( grep /^der$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and
321     $writeSuccess += $self->writeDER($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta);
322    
323     ( grep /^openssl$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and
324     $writeSuccess += $self->writeOpenSSL($idx,
325     $ta->{"crl"}[$idx]{"pemdata"},$ta);
326    
327     ( grep /^nss$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and
328     $writeSuccess += $self->writeNSS($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta);
329    
330     if ( $writeSuccess == $writeAttempt ) {
331     $::log->verb(4,"LastWrite time (mtime) set to current time");
332     $ta->{"crl"}[$idx]{"state"}{"mtime"} = time;
333     } else {
334     $::log->warn("Partial updating ($writeSuccess of $writeAttempt) for",
335     $ta->{"anchorname"},
336     "CRL $idx: mtime not updated");
337     }
338     $completesuccess &&= ($writeSuccess == $writeAttempt);
339     }
340    
341     return $completesuccess;
342     }
343    
344     1;

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