Prerequisites

• OpenSSH in Windows 10
• WSL2
• Golang

Solution

1. Run WSL2 container (e. g. Ubuntu):

   1ubuntu.exe

2. Make a symlink in WSL user home directory to .ssh directory from Windows:

   1ln -s "/mnt/c/Users/$WINDOWS_USERNAME/.ssh" "$HOME/.ssh"
   2chmod -R go= "$HOME/.ssh"

3. Fetch, build and install npiperelay:

   1go get -d github.com/jstarks/npiperelay
   2GOOS=windows go build -o "$HOME/.ssh/npiperelay.exe" github.com/jstarks/npiperelay
   3chmod +x "$HOME/.ssh/npiperelay.exe"

4. Install socat:

   1sudo apt install socat

5. Create state directory for SSH:

   1mkdir -p "$XDG_STATE_HOME/ssh" && chmod -R go= "$XDG_STATE_HOME/ssh"

6. Add the following to $HOME/.bashrc:

   1export SSH_AUTH_SOCK="$XDG_STATE_HOME/ssh/agent.socket"
   2ss -a | grep -q "$SSH_AUTH_SOCK"
   3if (( $? != 0 )); then
   4  rm -f "$SSH_AUTH_SOCK"
   5  ( setsid socat UNIX-LISTEN:"$SSH_AUTH_SOCK",fork,user=$USER,umask=077 \
   6  EXEC:"$HOME/.ssh/npiperelay.exe -ei -s //./pipe/openssh-ssh-agent",nofork & ) >/dev/null 2>&1
   7fi

7. Restart WSL2 container (PowerShell or CMD):

   1wsl.exe -t Ubuntu