package com.aranea_apps.android.libs.commons; import android.content.Context; import android.net.wifi.WifiManager; import android.os.Build; import android.provider.Settings.Secure; import android.telephony.TelephonyManager; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class UDIDGenerator { public static String getDeviceInfo() { return Build.MANUFACTURER + " " + Build.MODEL + " " + Build.VERSION.RELEASE; } public static String generateUDID(Context context) { //1 compute IMEI TelephonyManager TelephonyMgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); String m_szImei = TelephonyMgr.getDeviceId(); // Requires READ_PHONE_STATE //2 compute DEVICE ID String m_szDevIDShort = "35" + //we make this look like a valid IMEI Build.BOARD.length() % 10 + Build.BRAND.length() % 10 + Build.CPU_ABI.length() % 10 + Build.DEVICE.length() % 10 + Build.DISPLAY.length() % 10 + Build.HOST.length() % 10 + Build.ID.length() % 10 + Build.MANUFACTURER.length() % 10 + Build.MODEL.length() % 10 + Build.PRODUCT.length() % 10 + Build.TAGS.length() % 10 + Build.TYPE.length() % 10 + Build.USER.length() % 10; //13 digits //3 android ID - unreliable String m_szAndroidID = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID); //4 wifi manager, read MAC address - requires android.permission.ACCESS_WIFI_STATE or comes as null WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); String m_szWLANMAC = wm.getConnectionInfo().getMacAddress(); //6 SUM THE IDs String m_szLongID = m_szImei + m_szDevIDShort + m_szAndroidID + m_szWLANMAC; MessageDigest m = null; try { m = MessageDigest.getInstance("MD5"); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } m.update(m_szLongID.getBytes(), 0, m_szLongID.length()); byte p_md5Data[] = m.digest(); String m_szUniqueID = new String(); for (int i = 0; i < p_md5Data.length; i++) { int b = (0xFF & p_md5Data[i]); // if it is a single digit, make sure it have 0 in front (proper padding) if (b <= 0xF) m_szUniqueID += "0"; // add number to string m_szUniqueID += Integer.toHexString(b); } m_szUniqueID = m_szUniqueID.toUpperCase(); return m_szUniqueID; } }