rfc9946v8.txt   rfc9946.txt 
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values assigned (see Section 12.3.4). One of the following has to values assigned (see Section 12.3.4). One of the following has to
be set (see Section 5.3 for requirements and details of be set (see Section 5.3 for requirements and details of
operation): operation):
AUTHMODE_1: Required authentication for the Control phase. AUTHMODE_1: Required authentication for the Control phase.
AUTHMODE_2: Required authentication for the Control and Data AUTHMODE_2: Required authentication for the Control and Data
phases (Status Feedback PDU only). phases (Status Feedback PDU only).
A range of 60 through 63 is reserved for experimentation. IANA has A range of 60 through 63 is reserved for experimentation. IANA has
created the "Test Setup PDU Authentication Mode registry for the created the "Test Setup PDU Authentication Mode" registry for the
assigned values; see Section 12.3.4. assigned values; see Section 12.3.4.
authUnixTime: A 32-bit timestamp of the current system (wall-clock) authUnixTime: A 32-bit timestamp of the current system (wall-clock)
time since the Unix Epoch on January 1, 1970 at 00:00:00 UTC. time since the Unix Epoch on January 1, 1970 at 00:00:00 UTC.
authDigest: This field contains the 32-octet HMAC-SHA-256 hash that authDigest: This field contains the 32-octet HMAC-SHA-256 hash that
covers the entire PDU. Normally, the calculation is done as the covers the entire PDU. Normally, the calculation is done as the
last step of building the PDU. However, if the optional checkSum last step of building the PDU. However, if the optional checkSum
field is being utilized, it becomes the penultimate step and is field is being utilized, it becomes the penultimate step and is
done just prior to the checksum calculation (with the checkSum done just prior to the checksum calculation (with the checkSum
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