/[pdpsoft]/nl.nikhef.pdp.fetchcrl/trunk/CRLWriter.pm
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Contents of /nl.nikhef.pdp.fetchcrl/trunk/CRLWriter.pm

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Revision 2277 - (show annotations) (download) (as text)
Mon Apr 11 06:54:34 2011 UTC (10 years, 6 months ago) by davidg
File MIME type: application/x-perl
File size: 10438 byte(s)
Moved fetch-crl to seprarate repo tree

1 #
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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