HIGH_GMAC

By jonasfoyth , 21 April, 2020

Forums

Hello,

I am trying to use HIGH_GMAC authentication with the python module, but the configuration is not working.

Configuration:

self.media = GXNet(NetworkType.UDP, str(meter_idetintfication), PORT)
self.client = GXDLMSSecureClient(True)
self.client.interfaceType = InterfaceType.WRAPPER
self.client.serverAddress = int(1)
self.client.clientAddress = int(16)
self.client.authentication = Authentication['HIGH_GMAC']
self.client.ciphering.security = Security.AUTHENTICATION_ENCRYPTION
self.client.ciphering.systemTitle = GXByteBuffer.hexToBytes('3132333435363738')
self.client.ciphering.authenticationkey = GXByteBuffer.hexToBytes(AUTHENTICATION_KEY)
self.client.ciphering.blockCipherKey = GXByteBuffer.hexToBytes(BLOCK_CYPER_KEYY)
self.client.useLogicalNameReferencing = True

In GXDLSMDirector it's working.

Any suggestions for testing the configuration?

The image is the error when i execute this configuration.

Hi,

I just tested and it worked. Can you try to run example client like this:

python main.py -h localhost -p 4061 -a HighGMac -T 3132333435363738 -A D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF -B 000102030405060708090A0B0C0D0E0F -t Verbose

Update your keys to example.
BR,
Mikko

Yes, it's working with some

Yes, it's working with some more configurations:

python main.py -h 192.168.6.22 -p 4059 -a HighGMac -c 16 -s 1 -w -r ln -T 3132333435363738 -A XXXXX-B XXXXX -t Verbose

But when a run my scrip:

raise GXDLMSException(resultComponent, resultDiagnosticValue)
gurux_dlms.GXDLMSException.GXDLMSException: Access Error : Device reports a hardware fault.

It's caused by using:

self.client.ciphering.security = Security.AUTHENTICATION_ENCRYPTION (used in GXDLSMDirector to connect)

when i run without that (i try to write in a object):

gurux_dlms.GXDLMSException.GXDLMSException: Access Error : Device reports Read-Write denied.