2.2.2.3.2 Connection Request

The Connection Request message is used when the client initiates a connection request with a host device.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
CurveType								HMACSize																Nonce
...
... Message Fragment Size																								MessageFragmentSize
...																								PublicKeyXLength
...								PublicKeyX (variable)
...
...
PublicKeyYLength																PublicKeyY (variable)
...
...

CurveType (1 byte): The type of elliptical curve used, which can be the following value.

Value	Meaning
0	CT_NIST_P256_KDF_SHA512

HMACSize (2 bytes): The expected size of HMAC (see Encryption section 3.1.3.1 for details).

Nonce (8 bytes): Random values (see Encryption section 3.1.3.1 for details).

MessageFragmentSize (4 bytes): The maximum size of a single message fragment (Fixed Value of 16384).

PublicKeyXLength (2 bytes): The length of PublicKeyX.

PublicKeyX (variable): A fixed-length key that is based on PublicKeyXLength.

PublicKeyYLength (2 bytes): The length of PublicKeyY.

PublicKeyY (variable): A fixed-length key that is based on PublicKeyYLength.