tools/c_rehash.in

   1 #!{- $config{HASHBANGPERL} -}
   2
   3 # {- join("\n# ", @autowarntext) -}
   4 # Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
   5 #
   6 # Licensed under the Apache License 2.0 (the "License").  You may not use
   7 # this file except in compliance with the License.  You can obtain a copy
   8 # in the file LICENSE in the source distribution or at
   9 # https://www.openssl.org/source/license.html
  10
  11 # Perl c_rehash script, scan all files in a directory
  12 # and add symbolic links to their hash values.
  13
  14 my $dir = {- quotify1($config{openssldir}) -};
  15 my $prefix = {- quotify1($config{prefix}) -};
  16
  17 my $errorcount = 0;
  18 my $openssl = $ENV{OPENSSL} || "openssl";
  19 my $pwd;
  20 my $x509hash = "-subject_hash";
  21 my $crlhash = "-hash";
  22 my $verbose = 0;
  23 my $symlink_exists=eval {symlink("",""); 1};
  24 my $removelinks = 1;
  25
  26 ##  Parse flags.
  27 while ( $ARGV[0] =~ /^-/ ) {
  28     my $flag = shift @ARGV;
  29     last if ( $flag eq '--');
  30     if ( $flag eq '-old') {
  31             $x509hash = "-subject_hash_old";
  32             $crlhash = "-hash_old";
  33     } elsif ( $flag eq '-h' || $flag eq '-help' ) {
  34             help();
  35     } elsif ( $flag eq '-n' ) {
  36             $removelinks = 0;
  37     } elsif ( $flag eq '-v' ) {
  38             $verbose++;
  39     }
  40     else {
  41             print STDERR "Usage error; try -h.\n";
  42             exit 1;
  43     }
  44 }
  45
  46 sub help {
  47         print "Usage: c_rehash [-old] [-h] [-help] [-v] [dirs...]\n";
  48         print "   -old use old-style digest\n";
  49         print "   -h or -help print this help text\n";
  50         print "   -v print files removed and linked\n";
  51         exit 0;
  52 }
  53
  54 eval "require Cwd";
  55 if (defined(&Cwd::getcwd)) {
  56         $pwd=Cwd::getcwd();
  57 } else {
  58         $pwd=`pwd`;
  59         chomp($pwd);
  60 }
  61
  62 # DOS/Win32 or Unix delimiter?  Prefix our installdir, then search.
  63 my $path_delim = ($pwd =~ /^[a-z]\:/i) ? ';' : ':';
  64 $ENV{PATH} = "$prefix/bin" . ($ENV{PATH} ? $path_delim . $ENV{PATH} : "");
  65
  66 if (! -x $openssl) {
  67         my $found = 0;
  68         foreach (split /$path_delim/, $ENV{PATH}) {
  69                 if (-x "$_/$openssl") {
  70                         $found = 1;
  71                         $openssl = "$_/$openssl";
  72                         last;
  73                 }
  74         }
  75         if ($found == 0) {
  76                 print STDERR "c_rehash: rehashing skipped ('openssl' program not available)\n";
  77                 exit 0;
  78         }
  79 }
  80
  81 if (@ARGV) {
  82         @dirlist = @ARGV;
  83 } elsif ($ENV{SSL_CERT_DIR}) {
  84         @dirlist = split /$path_delim/, $ENV{SSL_CERT_DIR};
  85 } else {
  86         $dirlist[0] = "$dir/certs";
  87 }
  88
  89 if (-d $dirlist[0]) {
  90         chdir $dirlist[0];
  91         $openssl="$pwd/$openssl" if (!-x $openssl);
  92         chdir $pwd;
  93 }
  94
  95 foreach (@dirlist) {
  96         if (-d $_ ) {
  97             if ( -w $_) {
  98                 hash_dir($_);
  99             } else {
 100                 print "Skipping $_, can't write\n";
 101                 $errorcount++;
 102             }
 103         }
 104 }
 105 exit($errorcount);
 106
 107 sub hash_dir {
 108         my %hashlist;
 109         print "Doing $_[0]\n";
 110         chdir $_[0];
 111         opendir(DIR, ".");
 112         my @flist = sort readdir(DIR);
 113         closedir DIR;
 114         if ( $removelinks ) {
 115                 # Delete any existing symbolic links
 116                 foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
 117                         if (-l $_) {
 118                                 print "unlink $_" if $verbose;
 119                                 unlink $_ || warn "Can't unlink $_, $!\n";
 120                         }
 121                 }
 122         }
 123         FILE: foreach $fname (grep {/\.(pem)|(crt)|(cer)|(crl)$/} @flist) {
 124                 # Check to see if certificates and/or CRLs present.
 125                 my ($cert, $crl) = check_file($fname);
 126                 if (!$cert && !$crl) {
 127                         print STDERR "WARNING: $fname does not contain a certificate or CRL: skipping\n";
 128                         next;
 129                 }
 130                 link_hash_cert($fname) if ($cert);
 131                 link_hash_crl($fname) if ($crl);
 132         }
 133 }
 134
 135 sub check_file {
 136         my ($is_cert, $is_crl) = (0,0);
 137         my $fname = $_[0];
 138         open IN, $fname;
 139         while(<IN>) {
 140                 if (/^-----BEGIN (.*)-----/) {
 141                         my $hdr = $1;
 142                         if ($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
 143                                 $is_cert = 1;
 144                                 last if ($is_crl);
 145                         } elsif ($hdr eq "X509 CRL") {
 146                                 $is_crl = 1;
 147                                 last if ($is_cert);
 148                         }
 149                 }
 150         }
 151         close IN;
 152         return ($is_cert, $is_crl);
 153 }
 154
 155
 156 # Link a certificate to its subject name hash value, each hash is of
 157 # the form <hash>.<n> where n is an integer. If the hash value already exists
 158 # then we need to up the value of n, unless its a duplicate in which
 159 # case we skip the link. We check for duplicates by comparing the
 160 # certificate fingerprints
 161
 162 sub link_hash_cert {
 163                 my $fname = $_[0];
 164                 $fname =~ s/'/'\\''/g;
 165                 my ($hash, $fprint) = `"$openssl" x509 $x509hash -fingerprint -noout -in "$fname"`;
 166                 chomp $hash;
 167                 chomp $fprint;
 168                 $fprint =~ s/^.*=//;
 169                 $fprint =~ tr/://d;
 170                 my $suffix = 0;
 171                 # Search for an unused hash filename
 172                 while(exists $hashlist{"$hash.$suffix"}) {
 173                         # Hash matches: if fingerprint matches its a duplicate cert
 174                         if ($hashlist{"$hash.$suffix"} eq $fprint) {
 175                                 print STDERR "WARNING: Skipping duplicate certificate $fname\n";
 176                                 return;
 177                         }
 178                         $suffix++;
 179                 }
 180                 $hash .= ".$suffix";
 181                 if ($symlink_exists) {
 182                         print "link $fname -> $hash\n" if $verbose;
 183                         symlink $fname, $hash || warn "Can't symlink, $!";
 184                 } else {
 185                         print "copy $fname -> $hash\n" if $verbose;
 186                         if (open($in, "<", $fname)) {
 187                             if (open($out,">", $hash)) {
 188                                 print $out $_ while (<$in>);
 189                                 close $out;
 190                             } else {
 191                                 warn "can't open $hash for write, $!";
 192                             }
 193                             close $in;
 194                         } else {
 195                             warn "can't open $fname for read, $!";
 196                         }
 197                 }
 198                 $hashlist{$hash} = $fprint;
 199 }
 200
 201 # Same as above except for a CRL. CRL links are of the form <hash>.r<n>
 202
 203 sub link_hash_crl {
 204                 my $fname = $_[0];
 205                 $fname =~ s/'/'\\''/g;
 206                 my ($hash, $fprint) = `"$openssl" crl $crlhash -fingerprint -noout -in '$fname'`;
 207                 chomp $hash;
 208                 chomp $fprint;
 209                 $fprint =~ s/^.*=//;
 210                 $fprint =~ tr/://d;
 211                 my $suffix = 0;
 212                 # Search for an unused hash filename
 213                 while(exists $hashlist{"$hash.r$suffix"}) {
 214                         # Hash matches: if fingerprint matches its a duplicate cert
 215                         if ($hashlist{"$hash.r$suffix"} eq $fprint) {
 216                                 print STDERR "WARNING: Skipping duplicate CRL $fname\n";
 217                                 return;
 218                         }
 219                         $suffix++;
 220                 }
 221                 $hash .= ".r$suffix";
 222                 if ($symlink_exists) {
 223                         print "link $fname -> $hash\n" if $verbose;
 224                         symlink $fname, $hash || warn "Can't symlink, $!";
 225                 } else {
 226                         print "cp $fname -> $hash\n" if $verbose;
 227                         system ("cp", $fname, $hash);
 228                         warn "Can't copy, $!" if ($? >> 8) != 0;
 229                 }
 230                 $hashlist{$hash} = $fprint;
 231 }