use Module::Load::Conditional qw[can_load check_install requires];

$Module::Load::Conditional::VERBOSE = 1;
my $crypt_mods = {'Crypt::CBC' => undef,
		  'Crypt::Blowfish' => undef,
		  'Digest::SHA1' => undef,
		  'MIME::Base64' => undef,
		  'Compress::Zlib' => undef,
		  'Crypt::DH' => undef};

if ((  can_load(modules=> {'Math::BigInt::GMP' => undef}, verbose => 1)
    || can_load(modules=> {'Math::BigInt' => undef}, verbose => 1))
    && can_load(modules => $crypt_mods, verbose => 1))
{
    $encryption_avail = 1;
}

print $encryption_avail
      ? "All required crypto modules found and loaded: Encryption available\n"
      : "Encryption disabled: required modules not found\n";