include: Remove ssh module

To avoid the dependency on ssh, this commit removes the ssh module
from the toolbox core package. The module will be moved to a separate
repository, presumably something along the lines of toolbox-goodies.

diff --git a/include/ssh.sh b/include/ssh.sh
deleted file mode 100644 (file)
index 2bc9b5b..0000000
--- a/include/ssh.sh
+++ /dev/null
@@ -1,197 +0,0 @@
-#!/bin/bash
-
-# ssh.sh - Toolbox module for SSH tunnels and dynamic proxies
-# Copyright (C) 2021 Matthias Kruk
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-__init() {
-       if ! include "log"; then
-               return 1
-       fi
-
-       declare -xgr __ssh_socket_dir="$TOOLBOX_HOME/ssh"
-
-       return 0
-}
-
-_ssh_get_socket_dir() {
-       if ! mkdir -p "$__ssh_socket_dir" &> /dev/null; then
-               error "Could not create $__ssh_socket_dir"
-               return 1
-       fi
-
-       echo "$__ssh_socket_dir"
-       return 0
-}
-
-_ssh_tunnel_ctrl_socket_name() {
-       local host="$1"
-       local port="$2"
-       local lport="$3"
-
-       local sockdir
-
-       if ! sockdir=$(_ssh_get_socket_dir); then
-               return 1
-       fi
-
-       echo "$sockdir/tunnel-$lport-$host-$port.sock"
-       return 0
-}
-
-_ssh_proxy_ctrl_socket_name() {
-       local host="$1"
-       local port="$2"
-
-       local sockdir
-
-       if ! sockdir=$(_ssh_get_socket_dir); then
-               return 1
-       fi
-
-       echo "$sockdir/proxy-$host-$port.sock"
-       return 0
-}
-
-_ssh_make_handle() {
-       local ctrlsock="$1"
-       local hostspec="$2"
-
-       local handle
-
-       if ! handle=$(base64 <<< "$ctrlsock" 2>/dev/null); then
-               return 1
-       fi
-
-       handle+=":"
-
-       if ! handle+=$(base64 <<< "$hostspec" 2>/dev/null); then
-               return 1
-       fi
-
-       echo "$handle"
-       return 0
-}
-
-_ssh_handle_get_ctrlsock() {
-       local handle="$1"
-
-       local ctrlsock
-
-       if ! ctrlsock=$(base64 -d <<< "${handle%%:*}" 2>/dev/null); then
-               return 1
-       fi
-
-       echo "$ctrlsock"
-       return 0
-}
-
-_ssh_handle_get_hostspec() {
-       local handle="$1"
-
-       local hostspec
-
-       if ! hostspec=$(base64 -d <<< "${handle##*:}" 2>/dev/null); then
-               return 1
-       fi
-
-       echo "$hostspec"
-       return 0
-}
-
-ssh_tunnel_open() {
-       local tunnel_host="$1"
-       local tunnel_user="$2"
-       local remote_addr="$3"
-       local remote_port="$4"
-       local local_addr="$5"
-       local local_port="$6"
-
-       local ctrl_sock
-       local addrspec
-       local sshtarget
-       local handle
-
-       addrspec="$local_addr:$local_port:$remote_addr:$remote_port"
-       sshtarget="$tunnel_user@$tunnel_host"
-
-       if ! ctrl_sock=$(_ssh_tunnel_ctrl_socket_name "$remote_addr" \
-                                                     "$remote_port" \
-                                                     "$local_port"); then
-               return 1
-       fi
-
-       if ! handle=$(_ssh_make_handle "$ctrl_sock" "$sshtarget"); then
-               return 1
-       fi
-
-       if ! ssh -M -S "$ctrl_sock" -fnNT -o "ExitOnForwardFailure=yes" \
-            -L "$addrspec" "$sshtarget" > /dev/null; then
-               return 1
-       fi
-
-       echo "$handle"
-       return 0
-}
-
-ssh_proxy_open() {
-       local proxy_host="$1"
-       local proxy_user="$2"
-       local local_addr="$3"
-       local local_port="$4"
-
-       local ctrl_sock
-       local addrspec
-       local sshtarget
-       local handle
-
-       addrspec="$local_addr:$local_port"
-       sshtarget="$proxy_user@$proxy_host"
-
-       if ! ctrl_sock=$(_ssh_proxy_ctrl_socket_name "$local_addr" "$local_port"); then
-               return 1
-       fi
-
-       if ! handle=$(_ssh_make_handle "$ctrl_sock" "$sshtarget"); then
-               return 1
-       fi
-
-       if ! ssh -M -S "$ctrl_sock" -fnNT -o "ExitOnForwardFailure=yes" \
-            -D "$addrspec" "$sshtarget" > /dev/null; then
-               return 1
-       fi
-
-       echo "$handle"
-       return 0
-}
-
-ssh_close() {
-       local handle="$1"
-
-       local ctrlsock
-       local hostspec
-
-       if ! ctrlsock=$(_ssh_handle_get_ctrlsock "$handle") ||
-          ! hostspec=$(_ssh_handle_get_hostspec "$handle"); then
-               log_error "Invalid handle"
-               return 1
-       fi
-
-       if ! ssh -S "$ctrlsock" -O exit "$hostspec" &> /dev/null; then
-               return 1
-       fi
-
-       return 0
-}