my @cmd = (qw{openssl rsautl -encrypt -oaep -pubin -inkey}, $keypath, '-in', $filepath);
push @cmd, ('-out', $outfile) if $outfile;
my @cmd = (qw{openssl rsautl -encrypt -oaep -pubin -inkey}, $keypath, '-in', $filepath);
push @cmd, ('-out', $outfile) if $outfile;