FIDO2 Aux Main Messages

Communications Between Aux and Main MCU

This describes the FIDO2 messages sent between Aux MCU and Main MCU.

Message Structure and Serial Link Specs

Each FIDO2 message is wrapped in the header defined as follows:

byte 4 - 5	byte 6 - 7	byte 8 - 555
FIDO2 Message Type	Reserved	Payload

FIDO2 Message Type:

• 0x0001: FIDO2 Authenticate Credential Request
• 0x0002: FIDO2 Authenticate Credential Response
• 0x0003: FIDO2 Make Credential Request
• 0x0004: FIDO2 Make Credential Response
• 0x0005: FIDO2 Get Assertion Request
• 0x0006: FIDO2 Get Assertion Response

Payload Payload is described by the individual messages linked above.