#!{- $config{HASHBANGPERL} -}

# Copyright 2000-2018 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

#

# Wrapper around the ca to make it easier to use

#

# {- join("\n# ", @autowarntext) -}

use strict;

use warnings;

my $openssl = "openssl";

if(defined $ENV{'OPENSSL'}) {

    $openssl = $ENV{'OPENSSL'};

} else {

    $ENV{'OPENSSL'} = $openssl;

}

my $verbose = 1;

my $OPENSSL_CONFIG = $ENV{"OPENSSL_CONFIG"} || "";

my $DAYS = "-days 365";

my $CADAYS = "-days 1095";	# 3 years

my $REQ = "$openssl req $OPENSSL_CONFIG";

my $CA = "$openssl ca $OPENSSL_CONFIG";

my $VERIFY = "$openssl verify";

my $X509 = "$openssl x509";

my $PKCS12 = "$openssl pkcs12";

# default openssl.cnf file has setup as per the following

my $CATOP = "/etc/pki/CA";

my $CAKEY = "cakey.pem";

my $CAREQ = "careq.pem";

my $CACERT = "cacert.pem";

my $CACRL = "crl.pem";

my $DIRMODE = 0777;

my $NEWKEY = "newkey.pem";

my $NEWREQ = "newreq.pem";

my $NEWCERT = "newcert.pem";

my $NEWP12 = "newcert.p12";

my $RET = 0;

my $WHAT = shift @ARGV || "";

my @OPENSSL_CMDS = ("req", "ca", "pkcs12", "x509", "verify");

my %EXTRA = extra_args(\@ARGV, "-extra-");

my $FILE;

sub extra_args {

    my ($args_ref, $arg_prefix) = @_;

    my %eargs = map {

	if ($_ < $#$args_ref) {

	    my ($arg, $value) = splice(@$args_ref, $_, 2);

	    $arg =~ s/$arg_prefix//;

	    ($arg, $value);

	} else {

	    ();

	}

    } reverse grep($$args_ref[$_] =~ /$arg_prefix/, 0..$#$args_ref);

    my %empty = map { ($_, "") } @OPENSSL_CMDS;

    return (%empty, %eargs);

}

# See if reason for a CRL entry is valid; exit if not.

sub crl_reason_ok

{

    my $r = shift;

    if ($r eq 'unspecified' || $r eq 'keyCompromise'

        || $r eq 'CACompromise' || $r eq 'affiliationChanged'

        || $r eq 'superseded' || $r eq 'cessationOfOperation'

        || $r eq 'certificateHold' || $r eq 'removeFromCRL') {

        return 1;

    }

    print STDERR "Invalid CRL reason; must be one of:\n";

    print STDERR "    unspecified, keyCompromise, CACompromise,\n";

    print STDERR "    affiliationChanged, superseded, cessationOfOperation\n";

    print STDERR "    certificateHold, removeFromCRL";

    exit 1;

}

# Copy a PEM-format file; return like exit status (zero means ok)

sub copy_pemfile

{

    my ($infile, $outfile, $bound) = @_;

    my $found = 0;

    open IN, $infile || die "Cannot open $infile, $!";

    open OUT, ">$outfile" || die "Cannot write to $outfile, $!";

    while (<IN>) {

        $found = 1 if /^-----BEGIN.*$bound/;

        print OUT $_ if $found;

        $found = 2, last if /^-----END.*$bound/;

    }

    close IN;

    close OUT;

    return $found == 2 ? 0 : 1;

}

# Wrapper around system; useful for debugging.  Returns just the exit status

sub run

{

    my $cmd = shift;

    print "====\n$cmd\n" if $verbose;

    my $status = system($cmd);

    print "==> $status\n====\n" if $verbose;

    return $status >> 8;

}

if ( $WHAT =~ /^(-\?|-h|-help)$/ ) {

    print STDERR "usage: CA.pl -newcert | -newreq | -newreq-nodes | -xsign | -sign | -signCA | -signcert | -crl | -newca [-extra-cmd extra-params]\n";

    print STDERR "       CA.pl -pkcs12 [-extra-pkcs12 extra-params] [certname]\n";

    print STDERR "       CA.pl -verify [-extra-verify extra-params] certfile ...\n";

    print STDERR "       CA.pl -revoke [-extra-ca extra-params] certfile [reason]\n";

    exit 0;

}

if ($WHAT eq '-newcert' ) {

    # create a certificate

    $RET = run("$REQ -new -x509 -keyout $NEWKEY -out $NEWCERT $DAYS $EXTRA{req}");

    print "Cert is in $NEWCERT, private key is in $NEWKEY\n" if $RET == 0;

} elsif ($WHAT eq '-precert' ) {

    # create a pre-certificate

    $RET = run("$REQ -x509 -precert -keyout $NEWKEY -out $NEWCERT $DAYS");

    print "Pre-cert is in $NEWCERT, private key is in $NEWKEY\n" if $RET == 0;

} elsif ($WHAT =~ /^\-newreq(\-nodes)?$/ ) {

    # create a certificate request

    $RET = run("$REQ -new $1 -keyout $NEWKEY -out $NEWREQ $DAYS $EXTRA{req}");

    print "Request is in $NEWREQ, private key is in $NEWKEY\n" if $RET == 0;

} elsif ($WHAT eq '-newca' ) {

    # create the directory hierarchy

    mkdir ${CATOP}, $DIRMODE;

    mkdir "${CATOP}/certs", $DIRMODE;

    mkdir "${CATOP}/crl", $DIRMODE ;

    mkdir "${CATOP}/newcerts", $DIRMODE;

    mkdir "${CATOP}/private", $DIRMODE;

    open OUT, ">${CATOP}/index.txt";

    close OUT;

    open OUT, ">${CATOP}/crlnumber";

    print OUT "01\n";

    close OUT;

    # ask user for existing CA certificate

    print "CA certificate filename (or enter to create)\n";

    $FILE = "" unless defined($FILE = <STDIN>);

    $FILE =~ s{\R$}{};

    if ($FILE ne "") {

        copy_pemfile($FILE,"${CATOP}/private/$CAKEY", "PRIVATE");

        copy_pemfile($FILE,"${CATOP}/$CACERT", "CERTIFICATE");

    } else {

        print "Making CA certificate ...\n";

        $RET = run("$REQ -new -keyout"

                . " ${CATOP}/private/$CAKEY"

                . " -out ${CATOP}/$CAREQ $EXTRA{req}");

        $RET = run("$CA -create_serial"

                . " -out ${CATOP}/$CACERT $CADAYS -batch"

                . " -keyfile ${CATOP}/private/$CAKEY -selfsign"

                . " -extensions v3_ca $EXTRA{ca}"

                . " -infiles ${CATOP}/$CAREQ") if $RET == 0;

        print "CA certificate is in ${CATOP}/$CACERT\n" if $RET == 0;

    }

} elsif ($WHAT eq '-pkcs12' ) {

    my $cname = $ARGV[0];

    $cname = "My Certificate" unless defined $cname;

    $RET = run("$PKCS12 -in $NEWCERT -inkey $NEWKEY"

            . " -certfile ${CATOP}/$CACERT"

            . " -out $NEWP12"

            . " -export -name \"$cname\" $EXTRA{pkcs12}");

    print "PKCS #12 file is in $NEWP12\n" if $RET == 0;

} elsif ($WHAT eq '-xsign' ) {

    $RET = run("$CA -policy policy_anything $EXTRA{ca} -infiles $NEWREQ");

} elsif ($WHAT eq '-sign' ) {

    $RET = run("$CA -policy policy_anything -out $NEWCERT $EXTRA{ca} -infiles $NEWREQ");

    print "Signed certificate is in $NEWCERT\n" if $RET == 0;

} elsif ($WHAT eq '-signCA' ) {

    $RET = run("$CA -policy policy_anything -out $NEWCERT"

            . " -extensions v3_ca $EXTRA{ca} -infiles $NEWREQ");

    print "Signed CA certificate is in $NEWCERT\n" if $RET == 0;

} elsif ($WHAT eq '-signcert' ) {

    $RET = run("$X509 -x509toreq -in $NEWREQ -signkey $NEWREQ"

            . " -out tmp.pem $EXTRA{x509}");

    $RET = run("$CA -policy policy_anything -out $NEWCERT"

            . "$EXTRA{ca} -infiles tmp.pem") if $RET == 0;

    print "Signed certificate is in $NEWCERT\n" if $RET == 0;

} elsif ($WHAT eq '-verify' ) {

    my @files = @ARGV ? @ARGV : ( $NEWCERT );

    my $file;

    foreach $file (@files) {

        my $status = run("$VERIFY \"-CAfile\" ${CATOP}/$CACERT $file $EXTRA{verify}");

        $RET = $status if $status != 0;

    }

} elsif ($WHAT eq '-crl' ) {

    $RET = run("$CA -gencrl -out ${CATOP}/crl/$CACRL $EXTRA{ca}");

    print "Generated CRL is in ${CATOP}/crl/$CACRL\n" if $RET == 0;

} elsif ($WHAT eq '-revoke' ) {

    my $cname = $ARGV[0];

    if (!defined $cname) {

        print "Certificate filename is required; reason optional.\n";

        exit 1;

    }

    my $reason = $ARGV[1];

    $reason = " -crl_reason $reason"

        if defined $reason && crl_reason_ok($reason);

    $RET = run("$CA -revoke \"$cname\"" . $reason . $EXTRA{ca});

} else {

    print STDERR "Unknown arg \"$WHAT\"\n";

    print STDERR "Use -help for help.\n";

    exit 1;

}

exit $RET;