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#!/usr/bin/perl # Perl c_rehash script, scan all files in a directory # and add symbolic links to their hash values. my $dir = "/opt/alt/openssl/etc/pki/tls"; my $prefix = "/opt/alt/openssl"; my $openssl = $ENV{OPENSSL} || "openssl"; my $pwd; my $x509hash = "-subject_hash"; my $crlhash = "-hash"; my $verbose = 0; my $symlink_exists=eval {symlink("",""); 1}; my $removelinks = 1; ## Parse flags. while ( $ARGV[0] =~ /^-/ ) { my $flag = shift @ARGV; last if ( $flag eq '--'); if ( $flag eq '-old') { $x509hash = "-subject_hash_old"; $crlhash = "-hash_old"; } elsif ( $flag eq '-h') { help(); } elsif ( $flag eq '-n' ) { $removelinks = 0; } elsif ( $flag eq '-v' ) { $verbose++; } else { print STDERR "Usage error; try -help.\n"; exit 1; } } sub help { print "Usage: c_rehash [-old] [-h] [-v] [dirs...]\n"; print " -old use old-style digest\n"; print " -h print this help text\n"; print " -v print files removed and linked\n"; exit 0; } eval "require Cwd"; if (defined(&Cwd::getcwd)) { $pwd=Cwd::getcwd(); } else { $pwd=`pwd`; chomp($pwd); } # DOS/Win32 or Unix delimiter? Prefix our installdir, then search. my $path_delim = ($pwd =~ /^[a-z]\:/i) ? ';' : ':'; $ENV{PATH} = "$prefix/bin" . ($ENV{PATH} ? $path_delim . $ENV{PATH} : ""); if(! -x $openssl) { my $found = 0; foreach (split /$path_delim/, $ENV{PATH}) { if(-x "$_/$openssl") { $found = 1; $openssl = "$_/$openssl"; last; } } if($found == 0) { print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n"; exit 0; } } if(@ARGV) { @dirlist = @ARGV; } elsif($ENV{SSL_CERT_DIR}) { @dirlist = split /$path_delim/, $ENV{SSL_CERT_DIR}; } else { $dirlist[0] = "$dir/certs"; } if (-d $dirlist[0]) { chdir $dirlist[0]; $openssl="$pwd/$openssl" if (!-x $openssl); chdir $pwd; } foreach (@dirlist) { if(-d $_ and -w $_) { hash_dir($_); } } sub hash_dir { my %hashlist; print "Doing $_[0]\n"; chdir $_[0]; opendir(DIR, "."); my @flist = readdir(DIR); closedir DIR; if ( $removelinks ) { # Delete any existing symbolic links foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) { if(-l $_) { unlink $_; print "unlink $_" if $verbose; } } } FILE: foreach $fname (grep {/\.(pem)|(crt)|(cer)|(crl)$/} @flist) { # Check to see if certificates and/or CRLs present. my ($cert, $crl) = check_file($fname); if(!$cert && !$crl) { print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n"; next; } link_hash_cert($fname) if($cert); link_hash_crl($fname) if($crl); } } sub check_file { my ($is_cert, $is_crl) = (0,0); my $fname = $_[0]; open IN, $fname; while(<IN>) { if(/^-----BEGIN (.*)-----/) { my $hdr = $1; if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) { $is_cert = 1; last if($is_crl); } elsif($hdr eq "X509 CRL") { $is_crl = 1; last if($is_cert); } } } close IN; return ($is_cert, $is_crl); } # Link a certificate to its subject name hash value, each hash is of # the form <hash>.<n> where n is an integer. If the hash value already exists # then we need to up the value of n, unless its a duplicate in which # case we skip the link. We check for duplicates by comparing the # certificate fingerprints sub link_hash_cert { my $fname = $_[0]; $fname =~ s/'/'\\''/g; my ($hash, $fprint) = `"$openssl" x509 $x509hash -fingerprint -noout -in "$fname"`; chomp $hash; chomp $fprint; $fprint =~ s/^.*=//; $fprint =~ tr/://d; my $suffix = 0; # Search for an unused hash filename while(exists $hashlist{"$hash.$suffix"}) { # Hash matches: if fingerprint matches its a duplicate cert if($hashlist{"$hash.$suffix"} eq $fprint) { print STDERR "WARNING: Skipping duplicate certificate $fname\n"; return; } $suffix++; } $hash .= ".$suffix"; if ($symlink_exists) { symlink $fname, $hash; print "link $fname -> $hash\n" if $verbose; } else { open IN,"<$fname" or die "can't open $fname for read"; open OUT,">$hash" or die "can't open $hash for write"; print OUT <IN>; # does the job for small text files close OUT; close IN; print "copy $fname -> $hash\n" if $verbose; } $hashlist{$hash} = $fprint; } # Same as above except for a CRL. CRL links are of the form <hash>.r<n> sub link_hash_crl { my $fname = $_[0]; $fname =~ s/'/'\\''/g; my ($hash, $fprint) = `"$openssl" crl $crlhash -fingerprint -noout -in '$fname'`; chomp $hash; chomp $fprint; $fprint =~ s/^.*=//; $fprint =~ tr/://d; my $suffix = 0; # Search for an unused hash filename while(exists $hashlist{"$hash.r$suffix"}) { # Hash matches: if fingerprint matches its a duplicate cert if($hashlist{"$hash.r$suffix"} eq $fprint) { print STDERR "WARNING: Skipping duplicate CRL $fname\n"; return; } $suffix++; } $hash .= ".r$suffix"; if ($symlink_exists) { symlink $fname, $hash; print "link $fname -> $hash\n" if $verbose; } else { system ("cp", $fname, $hash); print "cp $fname -> $hash\n" if $verbose; } $hashlist{$hash} = $fprint; }