Subkey is a public key cryptographic utility that is developed within Substrate itself. Its main feature is generating and inspecting key pairs, currently supporting these scheme:
sr25519: Schorr signatures on the Ristretto group ed25519: SHA-512 (SHA-2) on Curve25519 secp256k1: ECDSA signatures on secp256k1
All keys in Substrate based networks (like polkadot) use the SS58 address encoding format that is the primary user-facing way to interact with keys.
Subkey also allows restoring keys from mnemonics and raw seeds; signing and verifying signatures on a message; and signing and verifying signatures for encoded transactions.
This is a simple dockerfile for create a docker image with subkey.
Docker
Build image:
docker build ./ -f Dockerfile-subkey -t rayniel95/substrate/subkey:v1.0
Execute container: docker run rayniel95/substrate/subkey:v1.0 subkey -h
Follow the instructions with the -h command.