We can't set Authentication key, Block cipher Key without using getparameters function.

Hi Mikko,

Please let me know should I convert all keys in ASCII or I can give in hex . Please let me know by example which key I can give in ASCII and which in hex and how I will give them.

Thanks
Regards
Satish

Hi Mikko,

I have set all my key properly as when I call initializeConnection() function it prints all set keys. But I'm not understanding if I call get parameter fuction then my code runs without any error but when I don't use getparameter function and set all keys and property manually then my program giving error. Please suggest. I'm giving my code as following:

client = GXDLMSSecureClient(useLogicalNameReferencing = True,clientAddress = 32, serverAddress = 1, forAuthentication = Authentication.LOW, password = bytes("ISK_SEC1".encode('utf-8')), interfaceType = InterfaceType.HDLC)
client.proposedConformance = client.proposedConformance | Conformance.GENERAL_PROTECTION
client.invocationCounter = "0.0.43.1.2.255"
client.ciphering.security = Security.ENCRYPTION
client.ciphering.systemTitle = bytes("ISK00001".encode('utf-8'))
client.ciphering.authenticationKey = bytes.fromhex("000102030405060708090A0B0C0D0E0F")
client.ciphering.blockCipherKey = bytes.fromhex("000102030405060708090A0B0C0D0E0F")
media = GXSerial(port="COM10")
media.baudRate = 9600
media.open()

reader = GXDLMSReader(client = client , media = media , trace = 0x8, invocationCounter = 0)
reader.initializeConnection()
obj = GXDLMSData("0.0.96.1.0.255")
x = reader.read(obj, 2)
print(f"Meter Sr. No is: {x}")
reader.disconnect()
media.close()

Authentication: 1
ClientAddress: 0x20
ServerAddress: 0x1
Standard: 0
Security: 32
System title: 49 53 4B 30 30 30 30 31
Authentication key: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
Block cipher key: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
TX: 12:29:08 7E A0 07 03 41 93 5A 64 7E
RX: 12:29:08 7E A0 20 41 03 73 3E 9D 81 80 14 05 02 03 40 06 02 03 40 07 04 00 00 00 01 08 04 00 00 00 01 B7 29 7E
TX: 12:29:08 7E A0 57 03 41 10 DF 07 E6 E6 00 60 49 A1 09 06 07 60 85 74 05 08 01 03 A6 0A 04 08 49 53 4B 30 30 30 30 31 8A 02 07 80 8B 07 60 85 74 05 08 02 01 AC 0A 80 08 49 53 4B 5F 53 45 43 31 BE 17 04 15 21 13 20 00 00 00 00 F4 8F 19 F6 58 14 32 72 55 06 FE BB A2 53 A5 F9 7E
RX: 12:29:08 7E A0 34 41 03 30 EC 5C E6 E7 00 61 26 A1 09 06 07 60 85 74 05 08 01 03 A2 03 02 01 01 A3 05 A1 03 02 01 01 BE 0D 04 0B 2E 09 20 00 00 0A DF 7C 32 48 1B CA FB 7E
Traceback (most recent call last):
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 819, in parsePDU2
_GXAPDU.parseUserInformation(settings, cipher, buff, xml)
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 330, in parseUserInformation
_GXAPDU.parseInitiate(False, settings, cipher, data, xml)
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 557, in parseInitiate
_GXAPDU.parse(initiateRequest, settings, cipher, data, xml, tag)
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 410, in parse
raise ValueError("Invalid tag.")
ValueError: Invalid tag.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Final_08072024.py", line 69, in <module>
reader.initializeConnection() # First command start from here
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\GXDLMSReader.py", line 312, in initializeConnection
self.client.parseAareResponse(reply.data)
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\GXDLMSClient.py", line 581, in parseAareResponse
self.isAuthenticationRequired = _GXAPDU.parsePDU(self.settings, self.settings.cipher, reply, None) == SourceDiagnostic.AUTHENTICATION_REQUIRED
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 655, in parsePDU
ret = _GXAPDU.parsePDU2(settings, cipher, buff, xml)
File "C:\Users\s_paliwal\AppData\Local\Programs\Python\Python311\Lib\site-packages\gurux_dlms\_GXAPDU.py", line 826, in parsePDU2
raise GXDLMSException(resultComponent, resultDiagnosticValue)
gurux_dlms.GXDLMSException.GXDLMSException: Connection is permanently rejected

No reason is given.

Thanks Mikko,

Please let me know where I will update invocation counter value.

Regards
Satish

Hi Kurumi & Mikko,

Thanks a lot. Now issue has been resolved. I have no words to express my thanks.

Regards
Satish