Implement agent forwarding

[dnwobu]

Enable ssh agent forwarding. That is all

[pkittenis]

PRs welcome.

[dnwobu]

What library/package is blocking its implementation upstream? This can give me a was to investigate if other tools have the same issue and potentially give implementation a shot down the line.

[pkittenis]

For libssh2 (pssh.clients.native client), agent forwarding does not work yet. Blocked by 535 - now resolved.

For libssh (pssh.clients.ssh client), forwarding is supported but not fully implemented in bindings.

To implement it for the libssh client would need:

• Callback support in ssh-python for open request auth agent requests from server - implement callbacks.
• Implement agent forwarding in parallel-ssh client
  The client needs to:
  • Request agent forwarding on a channel and provide a callback function to be called when the server requests to open the remote (the client's) auth agent
  • Write the local to the client agent's data via the callback by reading from the $SSH_AUTH_SOCK socket

Libssh API documentation.
Bindings API documentation.