#! /usr/bin/env sh

bits='2048'
option_fallback='0'
for arg in "$@"; do
	case "${arg}" in
		fallback)
			option_fallback='1'
			;;
		bits=*)
			bits="`echo "${arg}" | cut -f 2 -d =`"
			;;
	esac
done

openssl_dhparam() {
	if [ -x "`which openssl 2>/dev/null`" ]; then
		o_output="`openssl dhparam -C "$@" 2>/dev/null`" || return 1
		o_output="`echo "${o_output}" | sed 's/get_dh[0-9]\+/get_dhParams/'`" || return 1
		o_output="`echo "${o_output}" | sed '/^-----BEGIN DH PARAMETERS-----$/,/^-----END DH PARAMETERS-----$/ d;/^#/ d'`" || return 1

		return 0
	fi

	return 1
}

# Enable support for giving the same DH params each time
if [ "$1" = 'fallback' ]; then
if [ "${option_fallback}" = '1' ]; then
	gen_dh_params_fallback && exit 0

	echo "Unable to generate fallback parameters for DH of ${bits} bits" >&2

	exit 1
fi