tools/c_rehash.in

   1 #!/usr/local/bin/perl
   2
   3
   4 # Perl c_rehash script, scan all files in a directory
   5 # and add symbolic links to their hash values.
   6
   7 my $openssl;
   8
   9 my $dir;
  10 my $prefix;
  11
  12 if(defined $ENV{OPENSSL}) {
  13         $openssl = $ENV{OPENSSL};
  14 } else {
  15         $openssl = "openssl";
  16         $ENV{OPENSSL} = $openssl;
  17 }
  18
  19 my $pwd;
  20 eval "require Cwd";
  21 if (defined(&Cwd::getcwd)) {
  22         $pwd=Cwd::getcwd();
  23 } else {
  24         $pwd=`pwd`; chomp($pwd);
  25 }
  26 my $path_delim = ($pwd =~ /^[a-z]\:/i) ? ';' : ':'; # DOS/Win32 or Unix delimiter?
  27
  28 $ENV{PATH} = "$prefix/bin" . ($ENV{PATH} ? $path_delim . $ENV{PATH} : ""); # prefix our path
  29
  30 if(! -x $openssl) {
  31         my $found = 0;
  32         foreach (split /$path_delim/, $ENV{PATH}) {
  33                 if(-x "$_/$openssl") {
  34                         $found = 1;
  35                         $openssl = "$_/$openssl";
  36                         last;
  37                 }
  38         }
  39         if($found == 0) {
  40                 print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n";
  41                 exit 0;
  42         }
  43 }
  44
  45 if(@ARGV) {
  46         @dirlist = @ARGV;
  47 } elsif($ENV{SSL_CERT_DIR}) {
  48         @dirlist = split /$path_delim/, $ENV{SSL_CERT_DIR};
  49 } else {
  50         $dirlist[0] = "$dir/certs";
  51 }
  52
  53 if (-d $dirlist[0]) {
  54         chdir $dirlist[0];
  55         $openssl="$pwd/$openssl" if (!-x $openssl);
  56         chdir $pwd;
  57 }
  58
  59 foreach (@dirlist) {
  60         if(-d $_ and -w $_) {
  61                 hash_dir($_);
  62         }
  63 }
  64
  65 sub hash_dir {
  66         my %hashlist;
  67         print "Doing $_[0]\n";
  68         chdir $_[0];
  69         opendir(DIR, ".");
  70         my @flist = readdir(DIR);
  71         # Delete any existing symbolic links
  72         foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
  73                 if(-l $_) {
  74                         unlink $_;
  75                 }
  76         }
  77         closedir DIR;
  78         FILE: foreach $fname (grep {/\.pem$/} @flist) {
  79                 # Check to see if certificates and/or CRLs present.
  80                 my ($cert, $crl) = check_file($fname);
  81                 if(!$cert && !$crl) {
  82                         print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
  83                         next;
  84                 }
  85                 link_hash_cert($fname) if($cert);
  86                 link_hash_crl($fname) if($crl);
  87         }
  88 }
  89
  90 sub check_file {
  91         my ($is_cert, $is_crl) = (0,0);
  92         my $fname = $_[0];
  93         open IN, $fname;
  94         while(<IN>) {
  95                 if(/^-----BEGIN (.*)-----/) {
  96                         my $hdr = $1;
  97                         if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
  98                                 $is_cert = 1;
  99                                 last if($is_crl);
 100                         } elsif($hdr eq "X509 CRL") {
 101                                 $is_crl = 1;
 102                                 last if($is_cert);
 103                         }
 104                 }
 105         }
 106         close IN;
 107         return ($is_cert, $is_crl);
 108 }
 109
 110
 111 # Link a certificate to its subject name hash value, each hash is of
 112 # the form <hash>.<n> where n is an integer. If the hash value already exists
 113 # then we need to up the value of n, unless its a duplicate in which
 114 # case we skip the link. We check for duplicates by comparing the
 115 # certificate fingerprints
 116
 117 sub link_hash_cert {
 118                 my $fname = $_[0];
 119                 $fname =~ s/'/'\\''/g;
 120                 my ($hash, $fprint) = `"$openssl" x509 -hash -fingerprint -noout -in "$fname"`;
 121                 chomp $hash;
 122                 chomp $fprint;
 123                 $fprint =~ s/^.*=//;
 124                 $fprint =~ tr/://d;
 125                 my $suffix = 0;
 126                 # Search for an unused hash filename
 127                 while(exists $hashlist{"$hash.$suffix"}) {
 128                         # Hash matches: if fingerprint matches its a duplicate cert
 129                         if($hashlist{"$hash.$suffix"} eq $fprint) {
 130                                 print STDERR "WARNING: Skipping duplicate certificate $fname\n";
 131                                 return;
 132                         }
 133                         $suffix++;
 134                 }
 135                 $hash .= ".$suffix";
 136                 print "$fname => $hash\n";
 137                 $symlink_exists=eval {symlink("",""); 1};
 138                 if ($symlink_exists) {
 139                         symlink $fname, $hash;
 140                 } else {
 141                         open IN,"<$fname" or die "can't open $fname for read";
 142                         open OUT,">$hash" or die "can't open $hash for write";
 143                         print OUT <IN>; # does the job for small text files
 144                         close OUT;
 145                         close IN;
 146                 }
 147                 $hashlist{$hash} = $fprint;
 148 }
 149
 150 # Same as above except for a CRL. CRL links are of the form <hash>.r<n>
 151
 152 sub link_hash_crl {
 153                 my $fname = $_[0];
 154                 $fname =~ s/'/'\\''/g;
 155                 my ($hash, $fprint) = `"$openssl" crl -hash -fingerprint -noout -in '$fname'`;
 156                 chomp $hash;
 157                 chomp $fprint;
 158                 $fprint =~ s/^.*=//;
 159                 $fprint =~ tr/://d;
 160                 my $suffix = 0;
 161                 # Search for an unused hash filename
 162                 while(exists $hashlist{"$hash.r$suffix"}) {
 163                         # Hash matches: if fingerprint matches its a duplicate cert
 164                         if($hashlist{"$hash.r$suffix"} eq $fprint) {
 165                                 print STDERR "WARNING: Skipping duplicate CRL $fname\n";
 166                                 return;
 167                         }
 168                         $suffix++;
 169                 }
 170                 $hash .= ".r$suffix";
 171                 print "$fname => $hash\n";
 172                 $symlink_exists=eval {symlink("",""); 1};
 173                 if ($symlink_exists) {
 174                         symlink $fname, $hash;
 175                 } else {
 176                         system ("cp", $fname, $hash);
 177                 }
 178                 $hashlist{$hash} = $fprint;
 179 }
 180