#!/bin/bash
# Copyright 2021-2023 Evan Custodio (@defparam)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
# to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
# and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#

echo "  _____ _              _                       "
echo " |  ___| | _____  ____| |_   _ _ __ ___  _ __  "
echo " | |_  | |/ _ \ \/ / _\` | | | | '_ \` _ \| '_ \ "
echo " |  _| | |  __/>  < (_| | |_| | | | | | | |_) |"
echo " |_|   |_|\___/_/\_\__,_|\__,_|_| |_| |_| .__/ "
echo "                                        |_|    "
echo ""
echo "                                 by @defparam"
echo ""

if [ "$1" == "list" ]; then
	echo "[+] Application List:"
	echo "[+] -----------------"
	find /private/var/containers/Bundle/Application/ -maxdepth 2 -iname *.app | while read -r app; do
		echo "[+] $(basename "$app")"
	done
	exit 0

elif [ "$1" == "dump" ]; then
	if [ $# -ne 2 ]; then
		echo "[+] Error: Incorrect number of arguments"
		echo "[+] "
		echo "[+] flexdump dump <appname> - To decrypt and dump app into IPA"
		exit 1
	fi
	echo "[+] Searching for $2..."
	find /private/var/containers/Bundle/Application/ -maxdepth 2 -iname *.app | while read -r appdir; do
		if [ "$(basename "$appdir")" == "$2" ]; then
			cd $(dirname "$appdir"/)
			echo "[+] Found app at: $appdir"
			APPNAME="$(basename "$appdir")"
			APPNAME="${APPNAME::-4}"
			APPNAME="${APPNAME/" "/"_"}"
			VERSTR="$(cat "$appdir/Info.plist" | grep -A 1 CFBundleShortVersionString | grep -o '[0-9.]\+')"
			if [ -z "$VERSTR" ]; then
				VERSTR="0.0.0"
			fi
			OUTFILE="${APPNAME}_${VERSTR}_fd.ipa"
			echo "[+] App name: $APPNAME"			
			echo "[+] App version: $VERSTR"
			TEMPDIR="$(mktemp -d)"
			echo "[+] Preparing working directory at: ${TEMPDIR}/Payload"
			mkdir -p "${TEMPDIR}/Payload"		
			echo "[+] Copying application to: ${TEMPDIR}/Payload/$2 , please wait..."
			cp -rf "$appdir" "${TEMPDIR}/Payload"
			echo "[+] Decrypting and signing binaries..."
			find . -type d -name "_CodeSignature" | while read -r i; do
				find "$(dirname "$i")" -maxdepth 1 -type f | while read -r j; do
					if file "$j" | grep -q "Mach-O"; then
						echo "[+] Decrypting: $j"
						flexdecrypt2 "$j" &> /dev/null
						mv "/tmp/$(basename "$j")" "${TEMPDIR}/Payload/$j"
						echo "[+] Self-signing: $j"
						ldid -S "${TEMPDIR}/Payload/$j"
					fi
				done
			done
			echo "[+] Packaging final IPA file..."
			cd "${TEMPDIR}"
			mkdir -p "/var/root/dump"
			zip -qr /var/root/dump/"$OUTFILE" ./Payload
			rm -rf "${TEMPDIR}"
			echo "[+] Generated: /var/root/dump/$OUTFILE"
		fi
	done
	echo "[+] Done!"
	exit 0
else
    echo "[+] Error: Incorrect arguments supplied"
	echo "[+] "
	echo "[+] flexdump list - To list all installed apps"
	echo "[+] flexdump dump <appname> - To decrypt and dump app into IPA"
	exit 1
fi