[Bug 2099808] [NEW] Missing support for vpn.data-ciphers

[Heinrich Schuchardt]

Public bug reported:

For accessing an OpenVPN I have to use cipher "AES-128-CBC". With
earlier versions of Ubuntu adding

vpn.cipher: "AES-128-CBC"

to the netplan file via plasma-nm was good enough. Current OpenVPN
throws an error:

nm-openvpn[5639]: DEPRECATED OPTION: --cipher set to 'AES-128-CBC' but
missing in --data-ciphers (AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305).
OpenVPN ignores --cipher for cipher negotiations.

So I added

vpn.data-ciphers: "AES-256-GCM:AES-128-GCM:AES-128-CBC"

to the NetPlan file which overcomes the problem in OpenVPN.

But when editing the connection via plasma-nm the new field is not displayed and saving the connection deletes the entry.
--- 
ProblemType: Bug
ApportVersion: 2.31.0+git20250220-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
DistroRelease: Ubuntu 25.04
InstallationDate: Installed on 2021-07-01 (1333 days ago)
InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
Package: plasma-nm 4:6.3.1-0ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 6.12.0-15.15-generic 6.12.11
Tags: plucky
Uname: Linux 6.12.0-15-generic x86_64
UpgradeStatus: Upgraded to plucky on 2024-11-10 (106 days ago)
UserGroups: N/A
_MarkForUpload: True

** Affects: plasma-nm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected plucky

** Tags added: apport-collected plucky

** Description changed:

  For accessing an OpenVPN I have to use cipher "AES-128-CBC". With
  earlier versions of Ubuntu adding
  
  vpn.cipher: "AES-128-CBC"
  
  to the netplan file via plasma-nm was good enough. Current OpenVPN
  throws an error:
  
  nm-openvpn[5639]: DEPRECATED OPTION: --cipher set to 'AES-128-CBC' but
  missing in --data-ciphers (AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305).
  OpenVPN ignores --cipher for cipher negotiations.
  
  So I added
  
  vpn.data-ciphers: "AES-256-GCM:AES-128-GCM:AES-128-CBC"
  
  to the NetPlan file which overcomes the problem in OpenVPN.
  
- But when editing the connection via plasma-nm the new field is not
- displayed and saving the connection deletes the entry.
+ But when editing the connection via plasma-nm the new field is not displayed and saving the connection deletes the entry.
+ --- 
+ ProblemType: Bug
+ ApportVersion: 2.31.0+git20250220-0ubuntu2
+ Architecture: amd64
+ CasperMD5CheckResult: pass
+ CurrentDesktop: KDE
+ DistroRelease: Ubuntu 25.04
+ InstallationDate: Installed on 2021-07-01 (1333 days ago)
+ InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
+ Package: plasma-nm 4:6.3.1-0ubuntu1
+ PackageArchitecture: amd64
+ ProcVersionSignature: Ubuntu 6.12.0-15.15-generic 6.12.11
+ Tags: plucky
+ Uname: Linux 6.12.0-15-generic x86_64
+ UpgradeStatus: Upgraded to plucky on 2024-11-10 (106 days ago)
+ UserGroups: N/A
+ _MarkForUpload: True

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https://bugs.launchpad.net/bugs/2099808

Title:
  Missing support for vpn.data-ciphers

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