Patrick Fallberg
9f337e3cae
One bit in the protocol version field is converted to a sign
indicator. '1' means the message carries a signature in the
unused part of the payload data buffer.
Three new internal message types have been defined:
* I_REQUEST_SIGNING carries a boolean and is used to exchange
signing requirement information between
nodes.
If the I_REQUEST_SIGNING carries 'true'
the receiver is informed that the sender
require properly signed messages in order
to be able to accept the messages.
* I_GET_NONCE is passed from sender to a receiver that
require signing tellig it to submit a
cryptographic 'nonce' that the sender needs
in order to be able to sign the message it
intend to send. The I_GET_NONCE carries no
payload.
* I_GET_NONCE_RESPONSE is sent by the receiver of a signed
message in response to I_GET_NONCE.
The first byte of the payload is a signing
identifier informing the sender of the
signed message about the type of signature
the receiver is expecting.
For information on installing libraries, see: http://arduino.cc/en/Guide/Libraries