ric-geek / dlms-encrypt-decrypt-cli

Simple CLI for decrypting and encripting DLMS APDU

Dlms encrypt-decrypt command line tool

With this tool you can perform these operation:

• Generate encrypted APDU
• Decrypt APDU
• Authenticate APDU
• Generate encryption key

Installation

Use pip:

pip install setup.py

Use pypi:

pip install dlms-cli

Usage

Encrypt

Example
System Title = 5249435249435249
Frame Counter = 80000001
Encryption Key = 454E4352595054494F4E4B45594B4559
Authentication Key = 41555448454E5449434154494F4E4B45
APDU = c001810001000060010aff0200

dlms_cli -e 5249435249435249 80000001 454E4352595054494F4E4B45594B4559 41555448454E5449434154494F4E4B45 c001810001000060010aff0200

Result

Encrypted/Decrypted APDU: 0de63f2331a09aa85e8830f5f3
Authentication TAG: 610d47e1e24b14e8a022aefc6a43f3a3

Decrypt

Example
System Title = 5249435249435249
Frame Counter = 80000001
Encryption Key = 454E4352595054494F4E4B45594B4559
Authentication Key = 41555448454E5449434154494F4E4B45
APDU = 0de63f2331a09aa85e8830f5f3

dlms_cli -d 5249435249435249 80000001 454E4352595054494F4E4B45594B4559 41555448454E5449434154494F4E4B45 0de63f2331a09aa85e8830f5f3

Result

Encrypted/Decrypted APDU: c001810001000060010aff0200
Authentication TAG: 977d4d21b7255a1b681fe6b1c902a7dc

Generate authenticated data

Example
System Title = 5249435249435249
Frame Counter = 00000001
Encryption Key = 454E4352595054494F4E4B45594B4559
Authentication Key = 41555448454E5449434154494F4E4B45
APDU = 0de63f2331a09aa85e8830f5f3

dlms_cli -a 5249435249435249 00000001 454E4352595054494F4E4B45594B4559 41555448454E5449434154494F4E4B45 0de63f2331a09aa85e8830f5f3

Result

TAG: 62d423292e0fe5320370881d

Generate encryption key

Example

dlms_cli -k

Result

Encryption Key: 08f418ad55d89f38388a7e379b16353f

Dependency

cryptography

License

MIT

dlms-encrypt-decrypt-cli's Issues

-d parameter / decryption not working

Excuse me, but i'm fiddeling arount to get data out of my smartmeter and the data is encrypted.
The best program I found is your DLMS-APDU Encrypter-Decrypter. But I cannot reproduce the dlms_cli -d command from your readme.md. It seems like the code is missing from your programm. It is parsing the command line parameters key (line 64) enc (line69) and auth (line77) but the dec parameter is missing.

Maybe you can update the code so I can use it?