tools/c_rehash.in

   1 #!/usr/local/bin/perl
   2
   3 # Perl c_rehash script, scan all files in a directory
   4 # and add symbolic links to their hash values.
   5
   6 my $dir;
   7 my $prefix;
   8
   9 my $openssl = $ENV{OPENSSL} || "openssl";
  10 my $pwd;
  11 my $x509hash = "-subject_hash";
  12 my $crlhash = "-hash";
  13 my $verbose = 0;
  14 my $symlink_exists=eval {symlink("",""); 1};
  15 my $removelinks = 1;
  16
  17 ##  Parse flags.
  18 while ( $ARGV[0] =~ /^-/ ) {
  19     my $flag = shift @ARGV;
  20     last if ( $flag eq '--');
  21     if ( $flag eq '-old') {
  22             $x509hash = "-subject_hash_old";
  23             $crlhash = "-hash_old";
  24     } elsif ( $flag eq '-h') {
  25             help();
  26     } elsif ( $flag eq '-n' ) {
  27             $removelinks = 0;
  28     } elsif ( $flag eq '-v' ) {
  29             $verbose++;
  30     }
  31     else {
  32             print STDERR "Usage error; try -help.\n";
  33             exit 1;
  34     }
  35 }
  36
  37 sub help {
  38         print "Usage: c_rehash [-old] [-h] [-v] [dirs...]\n";
  39         print "   -old use old-style digest\n";
  40         print "   -h print this help text\n";
  41         print "   -v print files removed and linked\n";
  42         exit 0;
  43 }
  44
  45 eval "require Cwd";
  46 if (defined(&Cwd::getcwd)) {
  47         $pwd=Cwd::getcwd();
  48 } else {
  49         $pwd=`pwd`;
  50         chomp($pwd);
  51 }
  52
  53 # DOS/Win32 or Unix delimiter?  Prefix our installdir, then search.
  54 my $path_delim = ($pwd =~ /^[a-z]\:/i) ? ';' : ':';
  55 $ENV{PATH} = "$prefix/bin" . ($ENV{PATH} ? $path_delim . $ENV{PATH} : "");
  56
  57 if (! -x $openssl) {
  58         my $found = 0;
  59         foreach (split /$path_delim/, $ENV{PATH}) {
  60                 if (-x "$_/$openssl") {
  61                         $found = 1;
  62                         $openssl = "$_/$openssl";
  63                         last;
  64                 }
  65         }
  66         if ($found == 0) {
  67                 print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n";
  68                 exit 0;
  69         }
  70 }
  71
  72 if (@ARGV) {
  73         @dirlist = @ARGV;
  74 } elsif ($ENV{SSL_CERT_DIR}) {
  75         @dirlist = split /$path_delim/, $ENV{SSL_CERT_DIR};
  76 } else {
  77         $dirlist[0] = "$dir/certs";
  78 }
  79
  80 if (-d $dirlist[0]) {
  81         chdir $dirlist[0];
  82         $openssl="$pwd/$openssl" if (!-x $openssl);
  83         chdir $pwd;
  84 }
  85
  86 foreach (@dirlist) {
  87         if (-d $_ ) {
  88             if ( -w $_) {
  89                 hash_dir($_);
  90             } else {
  91                 print "Skipping $_, can't write\n";
  92             }
  93         }
  94 }
  95
  96 sub hash_dir {
  97         my %hashlist;
  98         print "Doing $_[0]\n";
  99         chdir $_[0];
 100         opendir(DIR, ".");
 101         my @flist = readdir(DIR);
 102         closedir DIR;
 103         if ( $removelinks ) {
 104                 # Delete any existing symbolic links
 105                 foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
 106                         if (-l $_) {
 107                                 print "unlink $_" if $verbose;
 108                                 unlink $_ || warn "Can't unlink $_, $!\n";
 109                         }
 110                 }
 111         }
 112         FILE: foreach $fname (grep {/\.(pem)|(crt)|(cer)|(crl)$/} @flist) {
 113                 # Check to see if certificates and/or CRLs present.
 114                 my ($cert, $crl) = check_file($fname);
 115                 if (!$cert && !$crl) {
 116                         print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
 117                         next;
 118                 }
 119                 link_hash_cert($fname) if ($cert);
 120                 link_hash_crl($fname) if ($crl);
 121         }
 122 }
 123
 124 sub check_file {
 125         my ($is_cert, $is_crl) = (0,0);
 126         my $fname = $_[0];
 127         open IN, $fname;
 128         while(<IN>) {
 129                 if (/^-----BEGIN (.*)-----/) {
 130                         my $hdr = $1;
 131                         if ($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
 132                                 $is_cert = 1;
 133                                 last if ($is_crl);
 134                         } elsif ($hdr eq "X509 CRL") {
 135                                 $is_crl = 1;
 136                                 last if ($is_cert);
 137                         }
 138                 }
 139         }
 140         close IN;
 141         return ($is_cert, $is_crl);
 142 }
 143
 144
 145 # Link a certificate to its subject name hash value, each hash is of
 146 # the form <hash>.<n> where n is an integer. If the hash value already exists
 147 # then we need to up the value of n, unless its a duplicate in which
 148 # case we skip the link. We check for duplicates by comparing the
 149 # certificate fingerprints
 150
 151 sub link_hash_cert {
 152                 my $fname = $_[0];
 153                 $fname =~ s/'/'\\''/g;
 154                 my ($hash, $fprint) = `"$openssl" x509 $x509hash -fingerprint -noout -in "$fname"`;
 155                 chomp $hash;
 156                 chomp $fprint;
 157                 $fprint =~ s/^.*=//;
 158                 $fprint =~ tr/://d;
 159                 my $suffix = 0;
 160                 # Search for an unused hash filename
 161                 while(exists $hashlist{"$hash.$suffix"}) {
 162                         # Hash matches: if fingerprint matches its a duplicate cert
 163                         if ($hashlist{"$hash.$suffix"} eq $fprint) {
 164                                 print STDERR "WARNING: Skipping duplicate certificate $fname\n";
 165                                 return;
 166                         }
 167                         $suffix++;
 168                 }
 169                 $hash .= ".$suffix";
 170                 if ($symlink_exists) {
 171                         print "link $fname -> $hash\n" if $verbose;
 172                         symlink $fname, $hash || warn "Can't symlink, $!";
 173                 } else {
 174                         print "copy $fname -> $hash\n" if $verbose;
 175                         if (open($in, "<", $fname)) {
 176                             if (open($out,">", $hash)) {
 177                                 print $out $_ while (<$in>);
 178                                 close $out;
 179                             } else {
 180                                 warn "can't open $hash for write, $!";
 181                             }
 182                             close $in;
 183                         } else {
 184                             warn "can't open $fname for read, $!";
 185                         }
 186                 }
 187                 $hashlist{$hash} = $fprint;
 188 }
 189
 190 # Same as above except for a CRL. CRL links are of the form <hash>.r<n>
 191
 192 sub link_hash_crl {
 193                 my $fname = $_[0];
 194                 $fname =~ s/'/'\\''/g;
 195                 my ($hash, $fprint) = `"$openssl" crl $crlhash -fingerprint -noout -in '$fname'`;
 196                 chomp $hash;
 197                 chomp $fprint;
 198                 $fprint =~ s/^.*=//;
 199                 $fprint =~ tr/://d;
 200                 my $suffix = 0;
 201                 # Search for an unused hash filename
 202                 while(exists $hashlist{"$hash.r$suffix"}) {
 203                         # Hash matches: if fingerprint matches its a duplicate cert
 204                         if ($hashlist{"$hash.r$suffix"} eq $fprint) {
 205                                 print STDERR "WARNING: Skipping duplicate CRL $fname\n";
 206                                 return;
 207                         }
 208                         $suffix++;
 209                 }
 210                 $hash .= ".r$suffix";
 211                 if ($symlink_exists) {
 212                         print "link $fname -> $hash\n" if $verbose;
 213                         symlink $fname, $hash || warn "Can't symlink, $!";
 214                 } else {
 215                         print "cp $fname -> $hash\n" if $verbose;
 216                         system ("cp", $fname, $hash);
 217                         warn "Can't copy, $!" if ($? >> 8) != 0;
 218                 }
 219                 $hashlist{$hash} = $fprint;
 220 }