Bug 470991

Summary:	kio-sftp tries to use old ssh key algorithms
Product:	[KDE Neon] neon	Reporter:	Joshua J. Kugler <joshua>
Component:	general	Assignee:	Neon Bugs <neon-bugs-null>
Status:	RESOLVED FIXED
Severity:	major	CC:	jr, neon-bugs-null, orangewinds, sitter
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Joshua J. Kugler 2023-06-13 21:22:19 UTC

SUMMARY
I'm trying to open a file on a remote host using sftp://. When I do so, I get this:

kex error : no match for method server host key algo: server [rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519], client [ssh-dss]

STEPS TO REPRODUCE
1. Try to connect to a modern host with kio-sftp.

OBSERVED RESULT
Connection error:

kex error : no match for method server host key algo: server [rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519], client [ssh-dss]

EXPECTED RESULT

Connection with modern ssh key algorithm.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon
(available in About System)
KDE Plasma Version: 23.04.1
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9

Comment 1 Harald Sitter 2023-07-05 13:09:02 UTC

Neon's libssh is outdated.

Comment 2 Joshua J. Kugler 2024-03-06 01:34:12 UTC

Still a problem with Neon/Plasma 6.

Comment 3 Aranjedeath 2024-06-21 00:48:16 UTC

Is this fixed in the 0.10.x branch of libssh? We will get that with noble.

Comment 4 Joshua J. Kugler 2024-12-13 17:53:35 UTC

This seems to be fixed. I'm on latest Neon (based on 24.04) and I can connect to Ubuntu 24.04, Ubuntu 22.04, Rocky Linux 9 and Macintosh machines.

Comment 5 Joshua J. Kugler 2025-02-03 22:09:02 UTC

Seeing as this is working fine in 24.04, I'll close this.