Salt
278e3942a2
It fetches a given host's IP and connects to that directly This way you can get a low-latency connection but still use Tor as a name service. Sort of.
91 lines
1.9 KiB
Bash
Executable File
91 lines
1.9 KiB
Bash
Executable File
#! /usr/bin/env bash
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#
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# ssht
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# Copyright (C) 2018 salt <salt@lap-th-e560-0>
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#
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# Distributed under terms of the MIT license.
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#
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name="$(basename $0 .sh)"
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# $1: Message
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function log() {
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[ -z ${1+x} ] && return 1
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printf "\e[94m$name\e[0m: $*\n"
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}
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# $1: Binary in $PATH
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function check_program_exists() {
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if ! which $1 > /dev/null 2>&1; then
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return 1
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fi
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return 0
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}
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function get_tor_port() {
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for port in 9050 9051 9150 9151; do
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if netstat -ntl | grep 127.0.0.1:"$port" > /dev/null 2>&1; then
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export return="$port"
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return 0
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fi
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done
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return 1
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}
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# $1: Tor Port
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# $2: Host
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# $*: Command
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function ssh_through_tor() {
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[ -z ${3+x} ] && return 1
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ssh -o ProxyCommand="nc -x 127.0.0.1:$1 \%h \%p" $2 ${*:3}
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}
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# $1: Tor Port
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# $2: Host
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function get_ssh_ip() {
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# Yes, this is bad and you could totally run it through an SSH tunnel
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# to avoid the curl requirement on the remote host
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# Yes, that would avoid an extraneous connection
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# TODO: That, also add curl to the list of critical requirements
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log "Checking if host $2 has curl"
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if ssh_through_tor "$1" "$2" which curl > /dev/null 2>&1; then
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log "Finding out host's IP through curl"
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export return="$(ssh_through_tor $1 $2 curl -s http://whatismyip.akamai.com)"
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return 0
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fi
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# TODO: Add more identification methods
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return 1
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}
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# $1: Host
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# $*: Arguments to ssh
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function main() {
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if ! [[ "$1" == *.onion ]]; then
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log "First argument must be a .onion address"
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exit 1
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fi
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for dep in ssh tor netstat nc; do
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if ! check_program_exists "$dep"; then
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log "Could not find critical dependency \"$dep\""
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exit 50
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fi
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done
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if ! get_tor_port; then
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log "Tor is not running"
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exit 51
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fi
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torport="$return"
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log "Found Tor listening on local port $torport"
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if ! get_ssh_ip $torport $1; then
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log "Failed to determine target's public IP"
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exit 52
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fi
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ssh_ip="$return"
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log "Found public IP: $ssh_ip"
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unset return torport
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exec ssh $ssh_ip ${*:2}
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}
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main "$@"
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