ssh-agent-bridge

This tool can bridge multiple ssh-agent protocols to one ssh-agent. Supported protocols are:

• pageant
• Git for Windows ssh-agent
• OpenSSH Win32 ssh-agent (Windows pipe)
• WSL ssh-agent socket using Windows' AF_UNIX sockets

This tool can listen for any of these and forward agent queries to any of these too.

Usage

Run ./ssh-agent-bridge.exe --help:

Usage of ssh-agent-bridge.exe:
  -debug
        enable debug logs
  -from string
        comma-separated list of endpoint to listen on, available: all, pipe, cygwin, wsl, pageant (cygwin also work for Git for Windows)
  -no-gui-error
        don't show a message box for fatal error
  -pipe string
        path to the pipe to use for pipe mode (default "\\.\pipe\openssh-ssh-agent")
  -to string
        endpoint to use as upstream agent, available: cygwin, wsl, pageant, pipe (cygwin also work for Git for Windows) (default "pageant")
  -cygwin-socket string
        path to the ssh-agent unix socket for cygwin-ssh-agent mode (default to SSH_AUTH_SOCK env variable)
  -wsl-socket string
        path to the WSL ssh-agent unix socket for wsl-ssh-agent mode (defaults to SSH_AUTH_SOCK env variable)

Usage example

Forwarding requests to pageant, from all of:

• Cygwin/Git for Windows on /tmp/ssh-0PcrJrq8KjAL/agent.418 (the cygwin path /tmp will be converted internally to %TMP%)
• Win32 OpenSSH on \\.\pipe\openssh-ssh-agent (the default)
• WSL socket on C:\wsl-ssh-agent.sock

Command line:

./ssh-agent-bridge.exe \
  --from cygwin,pipe,wsl \
  --to pageant \
  --cygwin-socket C:/git-bash-ssh-agent.sock \
  --wsl-socket C:/wsl-ssh-agent.sock

Then:

• In git bash, set export SSH_AUTH_SOCK=/c/git-bash-ssh-agent.sock
• In WSL, set export SSH_AUTH_SOCK=/mnt/c/wsl-ssh-agent.sock