155 lines
3.5 KiB
Perl
155 lines
3.5 KiB
Perl
#!/usr/bin/perl
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# Perl c_rehash script, scan all files in a directory
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# and add symbolic links to their hash values.
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my $openssl;
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my $dir = "/etc/ssl";
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if(defined $ENV{OPENSSL}) {
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$openssl = $ENV{OPENSSL};
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} else {
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$openssl = "openssl";
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$ENV{OPENSSL} = $openssl;
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}
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if(! -f $openssl) {
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my $found = 0;
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foreach (split /:/, $ENV{PATH}) {
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if(-f "$_/$openssl") {
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$found = 1;
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last;
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}
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}
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if($found == 0) {
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print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n";
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exit 0;
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}
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}
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if(@ARGV) {
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@dirlist = @ARGV;
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} elsif($ENV{SSL_CERT_DIR}) {
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@dirlist = split /:/, $ENV{SSL_CERT_DIR};
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} else {
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$dirlist[0] = "$dir/certs";
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}
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foreach (@dirlist) {
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if(-d $_ and -w $_) {
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hash_dir($_);
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}
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}
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sub hash_dir {
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my %hashlist;
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print "Doing $_[0]\n";
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chdir $_[0];
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opendir(DIR, ".");
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my @flist = readdir(DIR);
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# Delete any existing symbolic links
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foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
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if(-l $_) {
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unlink $_;
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}
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}
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closedir DIR;
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FILE: foreach $fname (grep {/\.pem$/} @flist) {
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# Check to see if certificates and/or CRLs present.
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my ($cert, $crl) = check_file($fname);
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if(!$cert && !$crl) {
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print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
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next;
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}
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link_hash_cert($fname) if($cert);
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link_hash_crl($fname) if($crl);
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}
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}
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sub check_file {
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my ($is_cert, $is_crl) = (0,0);
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my $fname = $_[0];
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open IN, $fname;
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while(<IN>) {
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if(/^-----BEGIN (.*)-----/) {
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my $hdr = $1;
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if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
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$is_cert = 1;
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last if($is_crl);
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} elsif($hdr eq "X509 CRL") {
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$is_crl = 1;
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last if($is_cert);
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}
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}
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}
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close IN;
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return ($is_cert, $is_crl);
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}
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# Link a certificate to its subject name hash value, each hash is of
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# the form <hash>.<n> where n is an integer. If the hash value already exists
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# then we need to up the value of n, unless its a duplicate in which
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# case we skip the link. We check for duplicates by comparing the
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# certificate fingerprints
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sub link_hash_cert {
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my $fname = $_[0];
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my ($hash, $fprint) = `$openssl x509 -hash -fingerprint -noout -in $fname`;
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chomp $hash;
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chomp $fprint;
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$fprint =~ s/^.*=//;
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$fprint =~ tr/://d;
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my $suffix = 0;
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# Search for an unused hash filename
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while(exists $hashlist{"$hash.$suffix"}) {
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# Hash matches: if fingerprint matches its a duplicate cert
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if($hashlist{"$hash.$suffix"} eq $fprint) {
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print STDERR "WARNING: Skipping duplicate certificate $fname\n";
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return;
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}
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$suffix++;
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}
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$hash .= ".$suffix";
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print "$fname => $hash\n";
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$symlink_exists=eval {symlink("",""); 1};
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if ($symlink_exists) {
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symlink $fname, $hash;
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} else {
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system ("cp", $fname, $hash);
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}
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$hashlist{$hash} = $fprint;
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}
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# Same as above except for a CRL. CRL links are of the form <hash>.r<n>
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sub link_hash_crl {
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my $fname = $_[0];
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my ($hash, $fprint) = `$openssl crl -hash -fingerprint -noout -in $fname`;
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chomp $hash;
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chomp $fprint;
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$fprint =~ s/^.*=//;
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$fprint =~ tr/://d;
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my $suffix = 0;
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# Search for an unused hash filename
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while(exists $hashlist{"$hash.r$suffix"}) {
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# Hash matches: if fingerprint matches its a duplicate cert
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if($hashlist{"$hash.r$suffix"} eq $fprint) {
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print STDERR "WARNING: Skipping duplicate CRL $fname\n";
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return;
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}
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$suffix++;
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}
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$hash .= ".r$suffix";
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print "$fname => $hash\n";
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$symlink_exists=eval {symlink("",""); 1};
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if ($symlink_exists) {
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symlink $fname, $hash;
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} else {
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system ("cp", $fname, $hash);
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}
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$hashlist{$hash} = $fprint;
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}
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