#!/bin/bash

if [ "$#" -ne 1 ]; then
	echo "[x] Incorrect arguments!"
	echo "     Using: $0 <TMP_DIR>"
	exit 1
fi

TMP_DIR=$1
APPS_DIR="$TMP_DIR/res/apks"
PERMISSIONS_APPS_DIR="$TMP_DIR/res/permissions"

mkdir -p "$TMP_DIR/res/permissions" \
		"$TMP_DIR/res/permissions/apps" \
		"$TMP_DIR/res/permissions/priv-apps" 

obtain_permissions() {
	local type_app=$1

	for apk in "${APPS_DIR}"/$type_app/*.apk; do
		package_name=$(aapt dump badging ${apk} | awk '/package:/{gsub("name=|'"'"'","");  print $2}')
		permissions=$(aapt dump badging ${apk} | awk '/uses-permission:/{gsub("name=|'"'"'","");  print $2}')

		if [[ $type_app == "apps" ]]; then
			out_file="${PERMISSIONS_APPS_DIR}/$type_app/default-permissions-${package_name}.xml"
			echo -e '<?xml version="1.0" encoding="utf-8"?>\n<exceptions>\n\t<exception package="'$package_name'">' > "$out_file"
			for p in $permissions; do
				echo -e '\t\t<permission name="'$p'" fixed="false"/>' >> "$out_file"
			done
			echo -e '\t</exception>\n</exceptions>' >> "$out_file"
		
			echo -e "\t[+] $out_file"
		else
			out_file="${PERMISSIONS_APPS_DIR}/$type_app/privapp-permissions-${package_name}.xml"
			echo -e '<?xml version="1.0" encoding="utf-8"?>\n<permissions>\n\t<privapp-permissions package="'$package_name'">' > "$out_file"
			for p in $permissions; do
				echo -e '\t\t<permission name="'$p'" />' >> "$out_file"
			done
			echo -e '\t</privapp-permissions>\n</permissions>' >> "$out_file"
			
			echo -e "\t[+] $out_file"
		fi

	done
}

echo -e "[*] Obtaining permissions from APKs."
obtain_permissions "apps"
obtain_permissions "priv-apps"