Problem with Decrypt in Python

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By SgmUsr , 27 January, 2021
Forums
General discussion

Hi,

I'm having a problem with a decryption phase with Python.

With this "Get Clock" request "7ea02e022103101c2ce6e600db001e3080000050523e079fa8b6375439df06798690dd1abf4c6357aba96cb98a72bd7e", meter returns "7ea033030221304d25e6e700db002330800000445765bdffdb7758bf79857392065e5c8a55a716ae902eac60519da7a9eeee42747e", which is correct.

But with self.clientSecure.getData(result, reply), it returns
"\gurux_dlms\GXDLMS.py", line 1678, in getPdu
raise ValueError("Invalid Command.")
ValueError: Invalid Command."

I'm using
- cst = '0000000000000000',
- sst = '3435110210410103',
- authenticationKey = 'A55E245150AE1CD434D58C5E08884084'
- blockCipherKey = 'A55E245150AE1CD434D58C5E08884084'

Could anyone help me?

Thanks a lot

Kurumi

5 years 4 months ago

Hi,

I checked from the trace that you are using Management client. Italy standard doesn't send serverSystemTitle Have you set it like this:
client = GXDLMSClient(...)
client.serverSystemTitle = GXByteBuffer.hexToBytes('3435110210410103')

BR,
Mikko

Kurumi

5 years 4 months ago

Hi,

Italy standard doesn't send system title as part of GLO_CIPHERING and now server system title is set to zero. I created an issue from this:
http://www.gurux.fi/node/17764

This is now fixed. Update to version 1.0.96.

BR,
Mikko

SgmUsr

5 years 4 months ago

Hi,

I found an error also in \gurux_dlms\GXDLMSChippering.py, row 112: tmp2.SetUInt8(0)

It could be "tmp2.setUInt8(0)".

Without this error it works very well.

Thank.

Kurumi

5 years 4 months ago

Hi,

Thank you for this info. I created an issue from this and this is fixed. The new version is released today.
https://www.gurux.fi/node/17766

BR,
Mikko