Elo TouchSystems ET1725L Series, User Manual

Page: 118 / 192

Section 3. Commands
19
load_key
Function
Load an encryption key into the device.
Syntax
/load_key
n key
n can be one of the following values:
M
– master key ( key is in clear text)
S
– session key ( key is encrypted under Master Key)
0
...
3
– lower working keys (
key
is encrypted under Session Key)
A
...
J
– upper working keys ( key is encrypted under Session Key)
key is the 16- or 32-character value of the key to be loaded.
Errors /load_key 30 <LF>
If the n field is invalid, key is the wrong length, or the device sends an error
(e.g., there is a key parity error).
/load_key 45 <LF>
If the required key is not loaded.
Remarks
This command is used to load a key into the device. With all but the master key, the
selected key is encrypted under another key so the application must know the
encrypted value of the key. The response to this command is:
/load_key
SS
SS is a two digit status code; 00 – success, 30 – invalid, 45 – rejected, etc.
Example To load the session key encrypted under the master key:
Command
/load_key S 99E1E835662DEA94 <LF>
Response /load_key 00 <LF>