buildroot

config BR2_PACKAGE_FSCRYPTCTL

    bool "fscryptctl"

    help

      fscryptctl is a low-level tool written in C that handles raw

      keys and manages policies for Linux filesystem encryption.

​

      Notice: Fscrypt support on EXT4 requires a kernel with

      CONFIG_EXT4_ENCRYPTION=y and a file system with the

      encryption option and block size equal to CPU page size

      (BR2_TARGET_ROOTFS_EXT2_MKFS_OPTIONS="-O encrypt -b 4096")

​

      https://github.com/google/fscryptctl