support for openssh configs (~/.ssh)

Operating system

macOS

System version

15.3

Installation type

Original sing-box Command Line

If you are using a graphical client, please provide the version of the client.

No response

Version

1.11.0

Description

It would be great if sing-box could use my existing common ssh configs (~/.ssh) that all apps that support this standard format use.
This will save time spent for configuration and duplication in different configs.
Also I couldn't find some features such as jump host option.

Reproduction

Currently sing-box only supports its own ssh configs.

Logs

Supporter

• I am a sponsor

Integrity requirements

• I confirm that I have read the documentation, understand the meaning of all the configuration items I wrote, and did not pile up seemingly useful options or default values.
• I confirm that I have provided the server and client configuration files and process that can be reproduced locally, instead of a complicated client configuration file that has been stripped of sensitive data.
• I confirm that I have provided the simplest configuration that can be used to reproduce the error I reported, instead of depending on remote servers, TUN, graphical interface clients, or other closed-source software.
• I confirm that I have provided the complete configuration files and logs, rather than just providing parts I think are useful out of confidence in my own intelligence.

Start by locating sing-box's existing SSH configuration handling and comparing it with the standard ~/.ssh configuration described in the issue. Clarify whether support should include jump hosts, then define compatibility checks; done means existing OpenSSH configurations can be used without duplicating them in sing-box.