dropbearconvert
Convert between Dropbear and OpenSSH private key formats.
TLDR
Convert an OpenSSH private key to the Dropbear format
$ dropbearconvert openssh dropbear [path/to/input_key] [path/to/output_key]
Convert a Dropbear private key to the OpenSSH format
$ dropbearconvert dropbear openssh [path/to/input_key] [path/to/output_key]