DLMS- GMAC: SNRM, AARQ, AARE is responding but not able to decrypt the Authentication key received from the meter

By Amogh_2729, 22 September, 2023
Forums
Gurux.DLMS

DLMS- GMAC: SNRM, AARQ, AARE is responding but not able to decrypt the Authentication key received from the meter to the agent but Gurux tool is able to decrypt and make successful connection. I have enclosed the snapshots containing logs from agent with the thread kindly help

Amogh_2729

2 months 1 week ago

AARQ

Image

Amogh_2729

2 months 1 week ago

AARE

Image

Amogh_2729

2 months 1 week ago

AARQ
================================
7e
a06b
03
41
10
19dc
e6e600
605da109060760857405080103a60a04
08504345492d3231308a0207808b0760
857405080205ac1280101a0377711c37
572807022b053a01581cbe230421211f
3000000000d4b65070b01025bdbb1b84
a878b15e912704726ca6d4ca0cf9bb
b255
7e
================================

AARE
================================
7ea077410330966fe6e7006169a10906
0760857405080103a203020100a305a1
0302010ea40a0408484f4c000cec4f83
88020780890760857405080205aa1280
104be47082534ea22d3982e0983db787
c1be230421281f300000177bd615f5f8
97610d3e33c9b1338e7831d9571be608
3ec0d3634ae0f6a77e
================================

Encryption_Req
================================
7e
a03f
03
41
32
f379
e6e600
cb3130000000025c64d0c7e473ba38d1
2de86799bd7726c0587d84848934d437
b77b1b17011564fc630faeb4e5f70077
190020
ec0c
7e
================================

Decryption_failed
================================
7ea0374103523539e6e700cf29300000
177cfe574d0d50641bd8f8de365d2147
c09463b9bb48042765d178b895be4972
1c55abfe5d8d40f57e
================================

Kurumi

2 months 1 week ago

Hi,

Please, don't add pictures. They are hard to read. Add plain text instead.

I believe that you need to read the invocation counter. Select "Secured connections" tab and set 0.0.43.1.3.255 to "Frame counter LN" field.

BR,
Mikko