Christie LWU720i User Manual page 103

8.4 Command Control via the Network (continued)
Automatic Connection Break
The TCP connection is automatically disconnected after there is no communication
for 30 seconds after being established.
Authentication
The projector does not accept commands without authentication success
when authentication is enabled. The projector uses a challenge response type
authentication with an MD5 (Message Digest 5) algorithm.
When the projector uses a LAN, a random 8 bytes is returned if authentication is
enabled. Bind this received 8 bytes and the Authentication Password and convert
this data using the MD5 algorithm and add this in front of the commands to send.
Following is a sample if the Authentication Password is set to password and the
random 8 bytes are a572f60c.
1) Connect the projector.
2) Receive the random 8 bytes a572f60c from the projector.
3) Bind the random 8 bytes a572f60c and the Authentication Password
"password" and it becomes a572f60cpassword.
4) Convert this bind a572f60cpassword using the MD5 algorithm.
It is e3d97429adffa11bce1f7275813d4bde.
5) Add this e3d97429adffa11bce1f7275813d4bde in front of the commands and
send the data.
Send e3d97429adffa11bce1f7275813d4bde + command.
6) When the sending data is correct, the command is performed and the reply
data is returned. Otherwise, an authentication error is returned.
NOTE
• For the transmission of the second or subsequent commands, the
authentication data can be omitted when the same connection.
LWU720i/LHD720i/LWU620i
User's Manual - Network Guide
101
8. Other Functions
020-001293-01 Rev. 1 (10-2017)