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on a server, I want to have several git repositories. I want different users (=different SSH keys) to have access to different repositories (think of GitHub).

I know I can add a user's SSH key to authorized_keys on the server. But that would give the user access to all repos.

How can I set this up correctly? How does GitHub do it?

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2 Answers 2

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The easiest solution is to install a tool for managing remote access to git repositories, such as:

If you're not willing to use any of those options, you can hack something together by binding keys in your authorized_keys file to a specific command (using the command= option) that is a wrapper that validates repository access. This answer has some ideas that might help you get started.

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Thanks, just what I was looking for
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I made a project for this problem. A git repository manager with virtual authorizations: Custom virtual routes, specific access for each user to specific repositories only:

Features:

  • Access to specific repositories for each user.
  • Prevent expose original internal paths.
  • Prevent access to out storage directories.
  • Separate authorization for read and write access.
  • Prevent a command execution out of git shell.
  • Use multiple users with multiple access with only one ssh account.
  • Very lite, only one python script and one json settings, no need a big application with big databases structures.

https://github.com/WHK102/gitman

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