Magtek MagneSafe V5, Reference Manual

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MagneSafe V5
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behavior is intended to discourage denial of service attacks. Exiting the
Authenticated Mode by timeout or card swipe
always increments the
KSN, exiting Authenticated Mode by the Deactivate Authenticated Mode
command
may increment the KSN.
Data structure:
Request Data:
Offset Field Name Description
0 Response to
Challenge 2 Seven bytes of Challenge 2 plus one byte of
Increment flag as outlined above, encrypted by the
specified variant of the current DUKPT Key
Response Data: None
Result codes:
0x00 Success
0x02 Bad Parameters – the Request Data is not a correct length
0x03 Bad Data – the encrypted reply data could not be verified
0x07 Sequence – not expecting this command
Example
Deactivate Authenticated Mode Request (Hex):
Cmd Num Data Len Data
12 08 8579827521573495
Example
Deactivate Authenticated Mode Response (Hex):
Result Code Data Len Data
00 00
Get Reader State Command
Command Number: 0x14
Description:
This command is used to get the current state of the reader. The state is
returned as two bytes that represent the Current State of the reader and
how it got to that state (Antecedent). For more information see
Reader
States .