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

Payload Payload is described by the individual messages linked above.