add script to convert ART OAT to DEX

Author: poliva

android/oat2dex.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Extract DEX file from inside Android Runtime OAT file using radare2
+# (c)2013 Pau Oliva (@pof)
+
+OAT="$1"
+if [ -z "${OAT}" ]; then
+	echo "Usage: $0 <file.oat>"
+	exit 0
+fi
+HIT=$(r2 -q -c '/ dex\n035' "${OAT}" 2>/dev/null |grep hit0_0 |awk '{print $1}')
+if [ -z "${HIT}" ]; then
+	echo "[-] ERROR: Can't find dex header"
+	exit 1
+else
+	echo "[+] DEX header found at address: ${HIT}"
+fi
+SIZE=$(r2 -e scr.color=false -q -c "px 4 @$HIT+32" ${OAT} 2>/dev/null |tail -n 1 |awk '{print $2 $3}' |sed -e "s/^/0x/" |rax2 -e)
+echo "[+] Dex file size: ${SIZE} bytes"
+r2 -q -c "pr ${SIZE} @${HIT} > ${OAT}.dex" "${OAT}" 2>/dev/null
+if [ $? -eq 0 ]; then
+	echo "[+] Dex file dumped to: ${OAT}.dex"
+else
+	echo "[-] ERROR: Something went wrong :("
+fi