148 lines
3.7 KiB
Perl
148 lines
3.7 KiB
Perl
#!/usr/bin/perl
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use strict;
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use warnings;
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# Very basic script to create TLS certificates for qpsmtpd
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use File::Temp qw/ tempfile tempdir /;
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use Getopt::Long;
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my %opts = ();
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chomp (my $hostname = `hostname --fqdn`);
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if ($?) {
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chomp($hostname = `hostname`);
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}
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print "Using hostname: $hostname\n";
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my %defaults = (
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C => 'XY',
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ST => 'unknown',
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L => 'unknown',
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O => 'QSMTPD',
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OU => 'Server',
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CN => $hostname,
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);
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GetOptions(\%opts,
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'C|Country:s',
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'ST|State:s',
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'L|Locality|City:s',
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'O|Organization:s',
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'OU|OrganizationalUnit|U:s',
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'CN|CommonName|N:s',
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'emailAddress|email|E:s',
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'help|H',
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);
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usage() if $opts{help};
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# initialize defaults
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foreach my $key ( keys %defaults ) {
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$opts{$key} = $defaults{$key} unless $opts{$key}
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}
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$opts{emailAddress} = 'postmaster@'.$opts{CN};
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mkdir('ssl') unless -d 'ssl';
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my $CA_key = 'ssl/qpsmtpd-ca.key';
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my $CA_crt = 'ssl/qpsmtpd-ca.crt';
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my $CA_serial = 'ssl/.cert.serial';
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my $template;
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my ($CA, $CAfilename) = tempfile( $template, DIR => "ssl", UNLINK => 1);
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print ${CA} return_cfg('CA');
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close ${CA};
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system('openssl', 'genrsa', '-out', $CA_key, 2048) == 0
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or die "Cannot create CA key: $?";
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system('openssl', 'req', '-config', $CAfilename, '-new', '-x509',
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'-days', (365*6), '-key', $CA_key,
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'-out', $CA_crt) == 0
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or die "Cannot create CA cert: $?";
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my $SERVER_key = 'ssl/qpsmtpd-server.key';
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my $SERVER_csr = 'ssl/qpsmtpd-server.csr';
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my $SERVER_crt = 'ssl/qpsmtpd-server.crt';
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my ($SERVER, $SERVERfilename) = tempfile( $template, DIR => "ssl", UNLINK => 1);
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print ${SERVER} return_cfg($opts{OU});
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close ${SERVER};
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system('openssl', 'genrsa', '-out', $SERVER_key, 1024) == 0
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or die "Cannot create server key: $?";
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system('openssl', 'req', '-config', $SERVERfilename, '-new',
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'-key', $SERVER_key, '-out', $SERVER_csr) == 0
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or die "Cannot create server cert: $?";
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my ($SIGN, $SIGNfilename) = tempfile( $template, DIR => "ssl", UNLINK => 1);
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print ${SIGN} <<"EOT";
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extensions = x509v3
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[ x509v3 ]
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subjectAltName = email:copy
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nsComment = tls certificate
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nsCertType = server
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EOT
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close ${SIGN};
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open my $SERIAL, '>', $CA_serial;
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print ${SERIAL} "01\n";
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close ${SERIAL};
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system('openssl', 'x509', '-extfile', $SIGNfilename, '-days', (365*2),
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'-CAserial', $CA_serial, '-CA', $CA_crt,
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'-CAkey', $CA_key, '-in', $SERVER_csr,
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'-req', '-out', $SERVER_crt) == 0
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or die "Cannot sign cert: $?";
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exit(0);
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sub return_cfg {
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my $OU = shift;
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my $RANDOM = int(rand(1000)).'RAN'.int(rand(1000)).'DOM';
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my $cfg = <<"EOT";
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[ req ]
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default_bits = 1024
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default_keyfile = keyfile.pem
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distinguished_name = req_distinguished_name
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attributes = req_attributes
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prompt = no
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output_password = mypass
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[ req_distinguished_name ]
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C = $opts{C}
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ST = $opts{ST}
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L = $opts{L}
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O = $opts{O}
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OU = $OU
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CN = $opts{CN}
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emailAddress = $opts{emailAddress}
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[ req_attributes ]
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challengePassword = $RANDOM challenge password
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EOT
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return $cfg;
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}
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sub usage {
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print STDERR <<"EOT";
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$0 will generate a TLS certificate "the quick way",
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i.e. without interaction. You can change some defaults however.
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These options are recognized: Default:
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--C Country (two letters, e.g. DE) $defaults{C}
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--ST State (spelled out) $defaults{ST}
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--L City $defaults{L}
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--O Organization $defaults{O}
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--OU Organizational Unit $defaults{OU}
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--CN Common name $defaults{CN}
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--email Email address of postmaster postmaster\@CN
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--help Show usage
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EOT
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exit(1);
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}
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