changing logical association name

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By nishitha , 11 August, 2020
Forums
Gurux DLMS for Java

1)in GXDLMSAssociationLogicalName.class we have logical name as "0.0.40.0.0.255" can we change this another association??
2)if we want to provide key then can we use setKek for giving the key??

Kurumi

5 years 10 months ago

Hi,

1. 0.0.40.0.0.255 is default association. Different associations have different OBIS codes.
2. KEK is the master key that is used to update authentication or block cipher key. KEK can be updated using the Security Setup object.

BR,
Mikko

nishitha

5 years 10 months ago

yes i want to use another obis code for association,so we can we change it in that particular file was my doubt thats all

nishitha

5 years 10 months ago

hi Mikko, now the data transfer we do consist only of plain data, can we encrypt the data and also decrypt , for that can we set key using the setKek()

Kurumi

5 years 10 months ago

Hi,

If you want to cipher (encrypt and decrypt) the data you need to set authentication key, block cipher key and Security.

BR,
Mikko

nishitha

5 years 10 months ago

OK Mikko, I see that ciphering key is in class GXDLMSSecureServer2.class it is already hardcoded, but i was not able to find authentication key and security, can you guide where are these values so that i could manipulate and test

Kurumi

5 years 10 months ago

Hi,

You can use this for the client and server.
getCiphering().setSecurity(Security.AUTHENTICATION_ENCRYPTION);
getCiphering().setSystemTitle(GXCommon.hexToBytes("HEX value"));
getCiphering().setAuthenticationKey(GXCommon.hexToBytes("HEX value"));
getCiphering().setBlockCipherKey(GXCommon.hexToBytes("HEX value"));
getCiphering().setDedicatedKey(GXCommon.hexToBytes("HEX value"));

BR,
Mikko