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# |
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# @(#)$Id$ |
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# |
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# ########################################################################### |
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# |
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# |
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# Syntax: |
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# CRLWriter->new( [name [,index]] ); |
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# CRLWriter->setTA( trustanchor ); |
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# CRLWriter->setIndex( index ); |
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# |
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package CRLWriter; |
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use strict; |
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use File::Basename; |
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use File::Temp qw/ tempfile /; |
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require OSSL and import OSSL unless defined &OSSL::new; |
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require base64 and import base64 unless defined &base64::b64encode; |
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use vars qw/ $log $cnf /; |
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|
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sub new { |
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my $obref = {}; bless $obref; |
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my $self = shift; |
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$self = $obref; |
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my $name = shift; |
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my $index = shift; |
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|
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$self->setTA($name) if defined $name; |
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$self->setIndex($name) if defined $index; |
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|
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return $self; |
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} |
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|
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|
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sub getName($) { |
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my $self = shift; |
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return 0 unless defined $self; |
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return $self->{"ta"}->getAnchorName; |
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} |
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|
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sub setTA($$) { |
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my $self = shift; |
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my ($ta) = shift; |
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return 0 unless defined $ta and defined $self; |
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$ta->{"anchorname"} or |
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$::log->err("CRLWriter::setTA called without uninitialised trust anchor") |
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and return 0; |
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$self->{"ta"} = $ta; |
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return 1; |
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} |
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|
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sub setIndex($$) { |
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my $self = shift; |
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my ($index) = shift; |
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return 0 unless defined $self; |
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$self->{"ta"} or |
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$::log->err("CRLWriter::setIndex called without a loaded TA") and |
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return 0; |
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my $ta = $self->{"ta"}; |
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|
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$ta->{"crlurls"} or |
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$::log->err("CRLWriter::setIndex called with uninitialised TA") and |
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return 0; |
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|
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! defined $index and delete $self->{"index"} and return 1; |
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|
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$index < 0 and |
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$::log->err("CRLWriter::setIndex called with invalid index $index") and |
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return 0; |
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$index > $#{$ta->{"crlurls"}} and |
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$::log->err("CRLWriter::setIndex index $index too large") and |
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return 0; |
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|
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$self->{"index"} = $index; |
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|
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return 1; |
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} |
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|
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sub updatefile($$%) { |
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my $file = shift; |
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my $content = shift; |
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my %flags = @_; |
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$content or return undef; |
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$file or |
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$::log->err("Cannot write content to undefined path") and return undef; |
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|
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my ( $basename, $path, $suffix ) = fileparse($file); |
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|
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# get content and do a comparison. If data identical, touch only |
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# to update mtime (other tools like NGC Nagios use this mtime semantics) |
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# |
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my $olddata; |
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my $mytime; |
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-f $file and do { |
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$mytime = (stat(_))[9]; |
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{ |
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open OLDFILE,'<',$file or |
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$::log->err("Cannot make backup of $file: $!") and return undef; |
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binmode OLDFILE; local $/; |
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$olddata = <OLDFILE>; close OLDFILE; |
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} |
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}; |
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if ( $flags{"BACKUP"} and $olddata ) { |
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if ( -w $path ) { |
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-e "$file~" and ( unlink "$file~" or |
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$::log->warn("Cannot remove old backup $file~: $!") and return undef); |
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if (open BCKFILE,'>',"$file~" ) { |
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print BCKFILE $olddata; |
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close BCKFILE; |
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utime $mytime,$mytime, "$file~"; |
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} else { |
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$::log->warn("Cannot reate backup $file~: $!"); |
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} |
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} else { |
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$::log->warn("Cannot make backup, $path not writable"); |
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} |
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} |
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|
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defined $olddata and $olddata eq $content and do { |
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$::log->verb(4,"$file unchanged - touch only"); |
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utime time,time,$file and return 1; |
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$::log->warn("Touch of $file failed, CRL unmodified"); |
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return 0; |
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}; |
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|
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# write new CRL to file ($file in $path) - attempting to do |
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# an atomic action to prevent a reace condition with clients |
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# but do not insist if the $path is not writable for new files |
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my $tmpcrlmode=((stat $file)[2] || 0644) & 07777; |
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$::log->verb(5,"TMP file for $file mode $tmpcrlmode"); |
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my $tmpcrl = File::Temp->new(DIR => $path, SUFFIX => '.tmp', |
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PERMS => $tmpcrlmode, UNLINK => 1); |
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if ( defined $tmpcrl ) { # we could create a tempfile next to current |
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print $tmpcrl $content or |
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$::log->err("Write to $tmpcrl: $!") and return undef; |
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# atomic move, but no need to restore from backup on failure |
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# and the unlink on destroy is implicit |
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chmod $tmpcrlmode,$tmpcrl or |
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$::log->err("chmod on $tmpcrl (to $tmpcrlmode): $!") and |
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return undef; |
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rename($tmpcrl, $file) or |
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$::log->err("rename $tmpcrl to $file: $!") and return undef; |
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# file was successfully renamed, so nothing left to unlink |
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$tmpcrl->unlink_on_destroy( 0 ); |
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} elsif ( open FH,'>',$file ) { |
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# no adjecent write possible, fall back to rewrite |
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print FH $content or |
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$::log->err("Write to $file: $!") and return undef; |
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close FH or |
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$::log->err("Close on write of $file: $!") and return undef; |
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} else { # something went wrong in opening the file for write, |
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# so try and restore backup if that was selected |
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$::log->err("Open for write of $file: $!"); |
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$flags{"BACKUP"} and ! -s "$file" and -s "$file~" and do { |
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#file has been clobbed, but backup OK |
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unlink "$file" and link "$file~","$file" and unlink "$file~" or |
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$::log->err("Restore of backup $file failed: $!"); |
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}; |
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return undef; |
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} |
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return 1; |
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} |
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|
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sub writePEM($$$$) { |
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my $self = shift; |
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my $idx = shift; |
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my $data = shift; |
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my $ta = shift; |
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defined $idx and $data and $ta or |
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$::log->err("CRLWriter::writePEM: missing index or data") and return 0; |
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|
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my $output = $::cnf->{_}->{"output"}; |
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$output = $::cnf->{_}->{"output_pem"} if defined $::cnf->{_}->{"output_pem"}; |
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$output and -d $output or |
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$::log->err("PEM target directory $output invalid") and return 0; |
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|
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my $filename = "$output/".$ta->{"nametemplate_pem"}; |
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$filename =~ s/\@R\@/$idx/g; |
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|
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my %flags = (); |
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$::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1; |
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|
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if ($data !~ /\n$/sm) { |
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$::log->verb(5,"Appending newline to short PEM file",$filename); |
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$data="$data\n"; |
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} |
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|
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$::log->verb(3,"Writing PEM file",$filename); |
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&updatefile($filename,$data,%flags) or return 0; |
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return 1; |
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} |
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|
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sub writeDER($$$$) { |
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my $self = shift; |
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my $idx = shift; |
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my $data = shift; |
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my $ta = shift; |
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defined $idx and $data and $ta or |
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$::log->err("CRLWriter::writeDER: missing index or data") and return 0; |
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|
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my $output = $::cnf->{_}->{"output"}; |
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$output = $::cnf->{_}->{"output_der"} if defined $::cnf->{_}->{"output_der"}; |
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$output and -d $output or |
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$::log->err("DER target directory $output invalid") and return 0; |
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|
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my $filename = "$output/".$ta->{"nametemplate_der"}; |
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$filename =~ s/\@R\@/$idx/g; |
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|
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my %flags = (); |
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$::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1; |
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|
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my $openssl=OSSL->new(); |
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my ($der,$errors) = $openssl->Exec3($data,qw/crl -inform PEM -outform DER/); |
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$errors or not $der and |
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$::log->err("Data count not be converted to DER: $errors") and return 0; |
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|
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$::log->verb(3,"Writing DER file",$filename); |
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&updatefile($filename,$der,%flags) or return 0; |
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return 1; |
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} |
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|
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sub writeOpenSSL($$$$) { |
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my $self = shift; |
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my $idx = shift; |
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my $data = shift; |
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my $ta = shift; |
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defined $idx and $data and $ta or |
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$::log->err("CRLWriter::writeOpenSSL: missing index, data or ta") and |
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return 0; |
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|
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my $output = $::cnf->{_}->{"output"}; |
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$output = $::cnf->{_}->{"output_openssl"} if |
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defined $::cnf->{_}->{"output_openssl"}; |
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$output and -d $output or |
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$::log->err("OpenSSL target directory $output invalid") and return 0; |
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|
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my $openssl=OSSL->new(); |
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|
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# guess the hash name or names from OpenSSL |
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# if mode is dual (and OpenSSL1 installed) write two files |
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my $opensslversion = $openssl->getVersion() or return 0; |
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|
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my ($cmddata,$errors); |
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my @hashes = (); |
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if ( $opensslversion ge "1" and $::cnf->{_}->{"opensslmode"} eq "dual" ) { |
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$::log->verb(5,"OpenSSL version 1 dual-mode enabled"); |
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# this mode needs the ta cafile to get both hashes, since these |
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# can only be extracted by the x509 subcommand from a CA ... |
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($cmddata,$errors) = $openssl->Exec3(undef, |
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qw/x509 -noout -subject_hash -subject_hash_old -in/, |
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$ta->{"cafile"}[0]); |
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$cmddata or |
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$::log->err("OpenSSL cannot extract hashes from",$ta->{"cafile"}[0]) and |
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return 0; |
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@hashes = split(/[\s\n]+/,$cmddata); |
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} else { |
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$::log->verb(5,"OpenSSL version 1 single-mode or pre-1.0 style"); |
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($cmddata,$errors) = $openssl->Exec3($data,qw/crl -noout -hash/); |
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$cmddata or |
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$::log->err("OpenSSL cannot extract hashes from CRL for", |
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$ta->{"alias"}.'/'.$idx |
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) and |
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return 0; |
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@hashes = split(/[\s\n]+/,$cmddata); |
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} |
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|
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my %flags = (); |
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$::cnf->{_}->{"backups"} and $flags{"BACKUP"} = 1; |
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|
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foreach my $hash ( @hashes ) { |
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my $filename = "$output/$hash.r$idx"; |
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$::log->verb(3,"Writing OpenSSL file",$filename); |
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&updatefile($filename,$data,%flags) or return 0; |
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} |
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return 1; |
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} |
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|
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sub writeNSS($$$$) { |
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my $self = shift; |
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my $idx = shift; |
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my $data = shift; |
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my $ta = shift; |
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defined $idx and $data and $ta or |
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$::log->err("CRLWriter::writeNSS: missing index, data or ta") and return 0; |
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|
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my $output = $::cnf->{_}->{"output"}; |
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$output = $::cnf->{_}->{"output_nss"} if defined $::cnf->{_}->{"output_nss"}; |
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$output and -d $output or |
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$::log->err("NSS target directory $output invalid") and return 0; |
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|
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my $dbprefix=""; |
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$dbprefix = $::cnf->{_}->{"nssdbprefix"} |
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if defined $::cnf->{_}->{"nssdbprefix"}; |
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|
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my $filename = "$output/$dbprefix"; |
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|
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# the crlutil tool requires the DER formatted cert in a file |
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my $tmpdir = $::cnf->{_}->{exec3tmpdir} || $ENV{"TMPDIR"} || '/tmp'; |
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my ($derfh,$dername) = tempfile("fetchcrl3der.XXXXXX", |
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DIR=>$tmpdir, UNLINK=>1); |
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(my $b64data = $data) =~ s/-[^\n]+//gm; |
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$b64data =~ s/\s+//gm; |
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print $derfh base64::b64decode($b64data); # der is decoded PEM :-) |
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|
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my $cmd = "crlutil -I -d \"$output\" -P \"$dbprefix\" "; |
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$::cnf->{_}->{nonssverify} and $cmd .= "-B "; |
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$cmd .= "-n ".$ta->{"alias"}.'.'.$idx." "; |
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$cmd .= "-i \"$dername\""; |
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my $result = `$cmd 2>&1`; |
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unlink $dername; |
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if ( $? != 0 ) { |
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$::log->err("Cannot update NSSDB filename: $result"); |
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} else { |
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$::log->verb(3,"WriteNSS: ".$ta->{"alias"}.'.'.$idx." added to $filename"); |
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} |
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|
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return 1; |
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} |
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|
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|
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sub writeall($) { |
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my $self = shift; |
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return 0 unless defined $self; |
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$self->{"ta"} or |
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$::log->err("CRLWriter::setIndex called without a loaded TA") and |
| 325 |
return 0; |
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my $ta = $self->{"ta"}; |
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$ta->{"crlurls"} or |
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$::log->err("CRLWriter::setIndex called with uninitialised TA") and |
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return 0; |
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|
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$::log->verb(2,"Writing CRLs for",$ta->{"anchorname"}); |
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|
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my $completesuccess = 1; |
| 334 |
for ( my $idx = 0 ; $idx <= $#{$ta->{"crl"}} ; $idx++ ) { |
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$ta->{"crl"}[$idx]{"pemdata"} or |
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$::log->verb(3,"Ignored CRL $idx skipped") and |
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next; # ignore empty crls, leave these in place |
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|
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my $writeAttempt = 0; |
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my $writeSuccess = 0; |
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|
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( grep /^pem$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and |
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$writeSuccess += $self->writePEM($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta); |
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|
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( grep /^der$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and |
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$writeSuccess += $self->writeDER($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta); |
| 347 |
|
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( grep /^openssl$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and |
| 349 |
$writeSuccess += $self->writeOpenSSL($idx, |
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$ta->{"crl"}[$idx]{"pemdata"},$ta); |
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|
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( grep /^nss$/, @{$::cnf->{_}->{formats_}} ) and ++$writeAttempt and |
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$writeSuccess += $self->writeNSS($idx,$ta->{"crl"}[$idx]{"pemdata"},$ta); |
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|
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if ( $writeSuccess == $writeAttempt ) { |
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$::log->verb(4,"LastWrite time (mtime) set to current time"); |
| 357 |
$ta->{"crl"}[$idx]{"state"}{"mtime"} = time; |
| 358 |
} else { |
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$::log->warn("Partial updating ($writeSuccess of $writeAttempt) for", |
| 360 |
$ta->{"anchorname"}, |
| 361 |
"CRL $idx: mtime not updated"); |
| 362 |
} |
| 363 |
$completesuccess &&= ($writeSuccess == $writeAttempt); |
| 364 |
} |
| 365 |
|
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return $completesuccess; |
| 367 |
} |
| 368 |
|
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