SigningKey.sm

#!/usr/bin/ruby

var Ed25519 = require('Crypt::PK::Ed25519')

class SigningKey() {

    has key = Ed25519.new.generate_key

    method keyFromPublic(String public) {
        key = Ed25519.new
        key.import_key_raw(pack('H*', public), 'public')
        self
    }

    method keyFromPrivate(String private) {
        key = Ed25519.new
        key.import_key_raw(pack('H*', private), 'private')
        self
    }

    method load(String file) {
        var private = File(file).read
        self.keyFromPrivate(private)
    }

    method store(String file) {
        File(file).write(self.getPrivate)
        self
    }

    method getPublic() {
        unpack('H*', key.export_key_raw('public'))
    }

    method getPrivate() {
        unpack('H*', key.export_key_raw('private'))
    }

    method sign(String message) {
        unpack('H*', key.sign_message(message))
    }

    method verify(String sig, String message) {
        key.verify_message(pack('H*', sig), message) ? true : false
    }
}