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 $_ and -w $_) {
  88                 hash_dir($_);
  89         }
  90 }
  91
  92 sub hash_dir {
  93         my %hashlist;
  94         print "Doing $_[0]\n";
  95         chdir $_[0];
  96         opendir(DIR, ".");
  97         my @flist = readdir(DIR);
  98         closedir DIR;
  99         if ( $removelinks ) {
 100                 # Delete any existing symbolic links
 101                 foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
 102                         if(-l $_) {
 103                                 unlink $_;
 104                                 print "unlink $_" if $verbose;
 105                         }
 106                 }
 107         }
 108         FILE: foreach $fname (grep {/\.(pem)|(crt)|(cer)|(crl)$/} @flist) {
 109                 # Check to see if certificates and/or CRLs present.
 110                 my ($cert, $crl) = check_file($fname);
 111                 if(!$cert && !$crl) {
 112                         print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
 113                         next;
 114                 }
 115                 link_hash_cert($fname) if($cert);
 116                 link_hash_crl($fname) if($crl);
 117         }
 118 }
 119
 120 sub check_file {
 121         my ($is_cert, $is_crl) = (0,0);
 122         my $fname = $_[0];
 123         open IN, $fname;
 124         while(<IN>) {
 125                 if(/^-----BEGIN (.*)-----/) {
 126                         my $hdr = $1;
 127                         if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
 128                                 $is_cert = 1;
 129                                 last if($is_crl);
 130                         } elsif($hdr eq "X509 CRL") {
 131                                 $is_crl = 1;
 132                                 last if($is_cert);
 133                         }
 134                 }
 135         }
 136         close IN;
 137         return ($is_cert, $is_crl);
 138 }
 139
 140
 141 # Link a certificate to its subject name hash value, each hash is of
 142 # the form <hash>.<n> where n is an integer. If the hash value already exists
 143 # then we need to up the value of n, unless its a duplicate in which
 144 # case we skip the link. We check for duplicates by comparing the
 145 # certificate fingerprints
 146
 147 sub link_hash_cert {
 148                 my $fname = $_[0];
 149                 $fname =~ s/'/'\\''/g;
 150                 my ($hash, $fprint) = `"$openssl" x509 $x509hash -fingerprint -noout -in "$fname"`;
 151                 chomp $hash;
 152                 chomp $fprint;
 153                 $fprint =~ s/^.*=//;
 154                 $fprint =~ tr/://d;
 155                 my $suffix = 0;
 156                 # Search for an unused hash filename
 157                 while(exists $hashlist{"$hash.$suffix"}) {
 158                         # Hash matches: if fingerprint matches its a duplicate cert
 159                         if($hashlist{"$hash.$suffix"} eq $fprint) {
 160                                 print STDERR "WARNING: Skipping duplicate certificate $fname\n";
 161                                 return;
 162                         }
 163                         $suffix++;
 164                 }
 165                 $hash .= ".$suffix";
 166                 if ($symlink_exists) {
 167                         symlink $fname, $hash;
 168                         print "link $fname -> $hash\n" if $verbose;
 169                 } else {
 170                         open IN,"<$fname" or die "can't open $fname for read";
 171                         open OUT,">$hash" or die "can't open $hash for write";
 172                         print OUT <IN>; # does the job for small text files
 173                         close OUT;
 174                         close IN;
 175                         print "copy $fname -> $hash\n" if $verbose;
 176                 }
 177                 $hashlist{$hash} = $fprint;
 178 }
 179
 180 # Same as above except for a CRL. CRL links are of the form <hash>.r<n>
 181
 182 sub link_hash_crl {
 183                 my $fname = $_[0];
 184                 $fname =~ s/'/'\\''/g;
 185                 my ($hash, $fprint) = `"$openssl" crl $crlhash -fingerprint -noout -in '$fname'`;
 186                 chomp $hash;
 187                 chomp $fprint;
 188                 $fprint =~ s/^.*=//;
 189                 $fprint =~ tr/://d;
 190                 my $suffix = 0;
 191                 # Search for an unused hash filename
 192                 while(exists $hashlist{"$hash.r$suffix"}) {
 193                         # Hash matches: if fingerprint matches its a duplicate cert
 194                         if($hashlist{"$hash.r$suffix"} eq $fprint) {
 195                                 print STDERR "WARNING: Skipping duplicate CRL $fname\n";
 196                                 return;
 197                         }
 198                         $suffix++;
 199                 }
 200                 $hash .= ".r$suffix";
 201                 if ($symlink_exists) {
 202                         symlink $fname, $hash;
 203                         print "link $fname -> $hash\n" if $verbose;
 204                 } else {
 205                         system ("cp", $fname, $hash);
 206                         print "cp $fname -> $hash\n" if $verbose;
 207                 }
 208                 $hashlist{$hash} = $fprint;
 209 }
 210