Initial commit

package/base-files/files/lib/upgrade/fwtool.sh

@@ -0,0 +1,65 @@
+fwtool_check_signature() {
+	[ $# -gt 1 ] && return 1
+
+	[ ! -x /usr/bin/ucert ] && {
+		if [ "$REQUIRE_IMAGE_SIGNATURE" = 1 ]; then
+			return 1
+		else
+			return 0
+		fi
+	}
+
+	if ! fwtool -q -s /tmp/sysupgrade.ucert "$1"; then
+		echo "Image signature not found"
+		[ "$REQUIRE_IMAGE_SIGNATURE" = 1 -a "$FORCE" != 1 ] && {
+			echo "Use sysupgrade -F to override this check when downgrading or flashing to vendor firmware"
+		}
+		[ "$REQUIRE_IMAGE_SIGNATURE" = 1 ] && return 1
+		return 0
+	fi
+
+	fwtool -q -T -s /dev/null "$1" | \
+		ucert -V -m - -c "/tmp/sysupgrade.ucert" -P /etc/opkg/keys
+
+	return $?
+}
+
+fwtool_check_image() {
+	[ $# -gt 1 ] && return 1
+
+	. /usr/share/libubox/jshn.sh
+
+	if ! fwtool -q -i /tmp/sysupgrade.meta "$1"; then
+		echo "Image metadata not found"
+		[ "$REQUIRE_IMAGE_METADATA" = 1 -a "$FORCE" != 1 ] && {
+			echo "Use sysupgrade -F to override this check when downgrading or flashing to vendor firmware"
+		}
+		[ "$REQUIRE_IMAGE_METADATA" = 1 ] && return 1
+		return 0
+	fi
+
+	json_load "$(cat /tmp/sysupgrade.meta)" || {
+		echo "Invalid image metadata"
+		return 1
+	}
+
+	device="$(cat /tmp/sysinfo/board_name)"
+
+	json_select supported_devices || return 1
+
+	json_get_keys dev_keys
+	for k in $dev_keys; do
+		json_get_var dev "$k"
+		[ "$dev" = "$device" ] && return 0
+	done
+
+	echo "Device $device not supported by this image"
+	echo -n "Supported devices:"
+	for k in $dev_keys; do
+		json_get_var dev "$k"
+		echo -n " $dev"
+	done
+	echo
+
+	return 1
+}