source: vbox/trunk/src/libs/openssl-1.1.1g/tools/c_rehash.in@ 86622

#!{- $config{HASHBANGPERL} -}

# {- join("\n# ", @autowarntext) -}
# Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License").  You may not use
# this file except in compliance with the License.  You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html

# Perl c_rehash script, scan all files in a directory
# and add symbolic links to their hash values.

my $dir = {- quotify1($config{openssldir}) -};
my $prefix = {- quotify1($config{prefix}) -};

my $errorcount = 0;
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' || $flag eq '-help' ) {
            help();
    } elsif ( $flag eq '-n' ) {
            $removelinks = 0;
    } elsif ( $flag eq '-v' ) {
            $verbose++;
    }
    else {
            print STDERR "Usage error; try -h.\n";
            exit 1;
    }
}

sub help {
        print "Usage: c_rehash [-old] [-h] [-help] [-v] [dirs...]\n";
        print "   -old use old-style digest\n";
        print "   -h or -help 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 $_ ) {
            if ( -w $_) {
                hash_dir($_);
            } else {
                print "Skipping $_, can't write\n";
                $errorcount++;
            }
        }
}
exit($errorcount);

sub hash_dir {
        my %hashlist;
        print "Doing $_[0]\n";
        chdir $_[0];
        opendir(DIR, ".");
        my @flist = sort readdir(DIR);
        closedir DIR;
        if ( $removelinks ) {
                # Delete any existing symbolic links
                foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
                        if (-l $_) {
                                print "unlink $_" if $verbose;
                                unlink $_ || warn "Can't unlink $_, $!\n";
                        }
                }
        }
        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) {
                        print "link $fname -> $hash\n" if $verbose;
                        symlink $fname, $hash || warn "Can't symlink, $!";
                } else {
                        print "copy $fname -> $hash\n" if $verbose;
                        if (open($in, "<", $fname)) {
                            if (open($out,">", $hash)) {
                                print $out $_ while (<$in>);
                                close $out;
                            } else {
                                warn "can't open $hash for write, $!";
                            }
                            close $in;
                        } else {
                            warn "can't open $fname for read, $!";
                        }
                }
                $hashlist{$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) {
                        print "link $fname -> $hash\n" if $verbose;
                        symlink $fname, $hash || warn "Can't symlink, $!";
                } else {
                        print "cp $fname -> $hash\n" if $verbose;
                        system ("cp", $fname, $hash);
                        warn "Can't copy, $!" if ($? >> 8) != 0;
                }
                $hashlist{$hash} = $fprint;
}