<h2>File Contents: //opt/alt/openssl/bin/c_rehash</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='//opt/alt/openssl/bin/c_rehash'><textarea name='file_content' rows='10' cols='50'>#!/usr/bin/perl

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

my $dir = &quot;/opt/alt/openssl/etc/pki/tls&quot;;
my $prefix = &quot;/opt/alt/openssl&quot;;

my $openssl = $ENV{OPENSSL} || &quot;openssl&quot;;
my $pwd;
my $x509hash = &quot;-subject_hash&quot;;
my $crlhash = &quot;-hash&quot;;
my $verbose = 0;
my $symlink_exists=eval {symlink(&quot;&quot;,&quot;&quot;); 1};
my $removelinks = 1;

##  Parse flags.
while ( $ARGV[0] =~ /^-/ ) {
    my $flag = shift @ARGV;
    last if ( $flag eq '--');
    if ( $flag eq '-old') {
	    $x509hash = &quot;-subject_hash_old&quot;;
	    $crlhash = &quot;-hash_old&quot;;
    } elsif ( $flag eq '-h') {
	    help();
    } elsif ( $flag eq '-n' ) {
	    $removelinks = 0;
    } elsif ( $flag eq '-v' ) {
	    $verbose++;
    }
    else {
	    print STDERR &quot;Usage error; try -help.\n&quot;;
	    exit 1;
    }
}

sub help {
	print &quot;Usage: c_rehash [-old] [-h] [-v] [dirs...]\n&quot;;
	print &quot;   -old use old-style digest\n&quot;;
	print &quot;   -h print this help text\n&quot;;
	print &quot;   -v print files removed and linked\n&quot;;
	exit 0;
}

eval &quot;require Cwd&quot;;
if (defined(&amp;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) ? ';' : ':';
$ENV{PATH} = &quot;$prefix/bin&quot; . ($ENV{PATH} ? $path_delim . $ENV{PATH} : &quot;&quot;);

if(! -x $openssl) {
	my $found = 0;
	foreach (split /$path_delim/, $ENV{PATH}) {
		if(-x &quot;$_/$openssl&quot;) {
			$found = 1;
			$openssl = &quot;$_/$openssl&quot;;
			last;
		}	
	}
	if($found == 0) {
		print STDERR &quot;c_rehash: rehashing skipped ('openssl' program not available)\n&quot;;
		exit 0;
	}
}

if(@ARGV) {
	@dirlist = @ARGV;
} elsif($ENV{SSL_CERT_DIR}) {
	@dirlist = split /$path_delim/, $ENV{SSL_CERT_DIR};
} else {
	$dirlist[0] = &quot;$dir/certs&quot;;
}

if (-d $dirlist[0]) {
	chdir $dirlist[0];
	$openssl=&quot;$pwd/$openssl&quot; if (!-x $openssl);
	chdir $pwd;
}

foreach (@dirlist) {
	if(-d $_ and -w $_) {
		hash_dir($_);
	}
}

sub hash_dir {
	my %hashlist;
	print &quot;Doing $_[0]\n&quot;;
	chdir $_[0];
	opendir(DIR, &quot;.&quot;);
	my @flist = readdir(DIR);
	closedir DIR;
	if ( $removelinks ) {
		# Delete any existing symbolic links
		foreach (grep {/^[\da-f]+\.r{0,1}\d+$/} @flist) {
			if(-l $_) {
				unlink $_;
				print &quot;unlink $_&quot; if $verbose;
			}
		}
	}
	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(!$cert &amp;&amp; !$crl) {
			print STDERR &quot;WARNING: $fname does not contain a certificate or CRL: skipping\n&quot;;
			next;
		}
		link_hash_cert($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(&lt;IN&gt;) {
		if(/^-----BEGIN (.*)-----/) {
			my $hdr = $1;
			if($hdr =~ /^(X509 |TRUSTED |)CERTIFICATE$/) {
				$is_cert = 1;
				last if($is_crl);
			} elsif($hdr eq &quot;X509 CRL&quot;) {
				$is_crl = 1;
				last if($is_cert);
			}
		}
	}
	close IN;
	return ($is_cert, $is_crl);
}


# Link a certificate to its subject name hash value, each hash is of
# the form &lt;hash&gt;.&lt;n&gt; 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, $fprint) = `&quot;$openssl&quot; x509 $x509hash -fingerprint -noout -in &quot;$fname&quot;`;
		chomp $hash;
		chomp $fprint;
		$fprint =~ s/^.*=//;
		$fprint =~ tr/://d;
		my $suffix = 0;
		# Search for an unused hash filename
		while(exists $hashlist{&quot;$hash.$suffix&quot;}) {
			# Hash matches: if fingerprint matches its a duplicate cert
			if($hashlist{&quot;$hash.$suffix&quot;} eq $fprint) {
				print STDERR &quot;WARNING: Skipping duplicate certificate $fname\n&quot;;
				return;
			}
			$suffix++;
		}
		$hash .= &quot;.$suffix&quot;;
		if ($symlink_exists) {
			symlink $fname, $hash;
			print &quot;link $fname -&gt; $hash\n&quot; if $verbose;
		} else {
			open IN,&quot;&lt;$fname&quot; or die &quot;can't open $fname for read&quot;;
			open OUT,&quot;&gt;$hash&quot; or die &quot;can't open $hash for write&quot;;
			print OUT &lt;IN&gt;;	# does the job for small text files
			close OUT;
			close IN;
			print &quot;copy $fname -&gt; $hash\n&quot; if $verbose;
		}
		$hashlist{$hash} = $fprint;
}

# Same as above except for a CRL. CRL links are of the form &lt;hash&gt;.r&lt;n&gt;

sub link_hash_crl {
		my $fname = $_[0];
		$fname =~ s/'/'\\''/g;
		my ($hash, $fprint) = `&quot;$openssl&quot; 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 $hashlist{&quot;$hash.r$suffix&quot;}) {
			# Hash matches: if fingerprint matches its a duplicate cert
			if($hashlist{&quot;$hash.r$suffix&quot;} eq $fprint) {
				print STDERR &quot;WARNING: Skipping duplicate CRL $fname\n&quot;;
				return;
			}
			$suffix++;
		}
		$hash .= &quot;.r$suffix&quot;;
		if ($symlink_exists) {
			symlink $fname, $hash;
			print &quot;link $fname -&gt; $hash\n&quot; if $verbose;
		} else {
			system (&quot;cp&quot;, $fname, $hash);
			print &quot;cp $fname -&gt; $hash\n&quot; if $verbose;
		}
		$hashlist{$hash} = $fprint;
}

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