The amlogic-meson-fwtools are distributed only in binary form by board vendors who use Amlogic Meson SoCs. These are not for redistribution; the package merely facilitates downloading them for your own use on your own Meson-based boards. Hardkernel supplies the tools: https://github.com/hardkernel/u-boot/tree/odroidc2-v2015.01 bin/aml_encrypt_gxb bin/aml_fip_create BayLibre supplies the tools: https://github.com/BayLibre/u-boot/tree/libretech-cc bin/aml_encrypt_gxl