Binary package “nacl-tools” in ubuntu focal
NaCl and CurveCP tools
NaCl (pronounced "salt") is a new easy-to-use high-speed
software library for network communication, encryption,
decryption, signatures, etc. NaCl's goal is to provide
all of the core operations needed to build higher-level
cryptographic tools. Tools include basic programs to
deploy CurveCP message-handling.