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- package de.tudarmstadt.informatik.hostage.commons;
- import java.net.InetAddress;
- import java.net.UnknownHostException;
- import java.security.KeyStore;
- import java.security.SecureRandom;
- import org.apache.http.HttpVersion;
- import org.apache.http.client.HttpClient;
- import org.apache.http.client.methods.HttpPost;
- import org.apache.http.conn.ClientConnectionManager;
- import org.apache.http.conn.scheme.PlainSocketFactory;
- import org.apache.http.conn.scheme.Scheme;
- import org.apache.http.conn.scheme.SchemeRegistry;
- import org.apache.http.conn.ssl.SSLSocketFactory;
- import org.apache.http.entity.StringEntity;
- import org.apache.http.impl.client.DefaultHttpClient;
- import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
- import org.apache.http.params.BasicHttpParams;
- import org.apache.http.params.HttpParams;
- import org.apache.http.params.HttpProtocolParams;
- import org.apache.http.protocol.HTTP;
- import android.content.Context;
- import android.net.ConnectivityManager;
- import android.net.NetworkInfo;
- import android.net.wifi.WifiInfo;
- import android.net.wifi.WifiManager;
- import android.os.Environment;
- import android.preference.PreferenceManager;
- import android.text.TextUtils;
- import de.tudarmstadt.informatik.hostage.logging.Record;
- import de.tudarmstadt.informatik.hostage.net.MySSLSocketFactory;
- /**
- * Helper class with some static methods for general usage.
- * @author Lars Pandikow
- * @author Wulf Pfeiffer
- *
- */
- public final class HelperUtils {
- /**
- * Gets SSID of the wireless network.
- * @param context Needs a context to get system recourses
- * @return SSID of wireless network if connected, else null.
- */
- public static String getSSID(Context context) {
- String ssid = null;
- ConnectivityManager connManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo networkInfo = connManager
- .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
- if (networkInfo != null && networkInfo.isConnected()) {
- final WifiManager wifiManager = (WifiManager) context
- .getSystemService(Context.WIFI_SERVICE);
- final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
- if (connectionInfo != null
- && !TextUtils.isEmpty(connectionInfo.getSSID())) {
- ssid = connectionInfo.getSSID();
- }
- }
- return ssid;
- }
- /**
- * Gets BSSID of the wireless network.
- * @param context Needs a context to get system recourses.
- * @return BSSID of wireless network if connected, else null.
- */
- public static String getBSSID(Context context) {
- String bssid = null;
- ConnectivityManager connManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo networkInfo = connManager
- .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
- if (networkInfo != null && networkInfo.isConnected()) {
- final WifiManager wifiManager = (WifiManager) context
- .getSystemService(Context.WIFI_SERVICE);
- final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
- if (connectionInfo != null
- && !TextUtils.isEmpty(connectionInfo.getSSID())) {
- bssid = connectionInfo.getBSSID();
- }
- }
- return bssid;
- }
- /**
- * Gets internal IP address of the device in a wireless network.
- * @param context Needs a context to get system recourses.
- * @return internal IP of the device in a wireless network if connected, else null.
- */
- public static String getInternalIP(Context context) {
- String ipAddress = null;
- ConnectivityManager connManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- NetworkInfo networkInfo = connManager
- .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
- if (networkInfo != null && networkInfo.isConnected()) {
- final WifiManager wifiManager = (WifiManager) context
- .getSystemService(Context.WIFI_SERVICE);
- final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
- if (connectionInfo != null) {
- try {
- ipAddress = InetAddress.getByAddress(
- unpackInetAddress(connectionInfo.getIpAddress()))
- .getHostAddress();
- } catch (UnknownHostException e) {
- e.printStackTrace();
- }
- }
- }
- return ipAddress;
- }
- private static byte[] unpackInetAddress(int bytes) {
- return new byte[] { (byte) ((bytes) & 0xff),
- (byte) ((bytes >>> 8) & 0xff), (byte) ((bytes >>> 16) & 0xff),
- (byte) ((bytes >>> 24) & 0xff) };
- }
- /**
- * Checks if external storage is available for read and write.
- * @return True if external storage is available for read and write, else false.
- */
- public static boolean isExternalStorageWritable() {
- String state = Environment.getExternalStorageState();
- if (Environment.MEDIA_MOUNTED.equals(state)) {
- return true;
- }
- return false;
- }
- /**
- * Creates a HttpClient with an own SSL Socket.
- * @return HttpsClient who accepts accepts all certificates.
- * @see MySSLSocketFactory
- */
- public static HttpClient createHttpClient() {
- try {
- KeyStore trustStore = KeyStore.getInstance(KeyStore
- .getDefaultType());
- trustStore.load(null, null);
- SSLSocketFactory sf = new MySSLSocketFactory(trustStore);
- sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
- HttpParams params = new BasicHttpParams();
- HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
- HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
- SchemeRegistry registry = new SchemeRegistry();
- registry.register(new Scheme("http", PlainSocketFactory
- .getSocketFactory(), 80));
- registry.register(new Scheme("https", sf, 443));
- ClientConnectionManager ccm = new ThreadSafeClientConnManager(
- params, registry);
- return new DefaultHttpClient(ccm, params);
- } catch (Exception e) {
- e.printStackTrace();
- return new DefaultHttpClient();
- }
- }
-
- /**
- * Uploads a single Record to a server, specified in the settings.
- * @param record The Record to upload.
- * @return True if the upload was successful, else false.
- */
- public static boolean uploadSingleRecord(Context context, Record record){
- // Create a https client. Uses MySSLSocketFactory to accept all certificates
- HttpClient httpclient = HelperUtils.createHttpClient();
- HttpPost httppost;
- try {
- // Create HttpPost
- httppost = new HttpPost(PreferenceManager.getDefaultSharedPreferences(context).getString("pref_upload", "https://ssi.cased.de"));
- // Create JSON String of Record
- StringEntity se = new StringEntity(record.toString(0x01));
- httppost.setEntity(se);
- // Execute HttpPost
- httpclient.execute(httppost);
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- return true;
- }
-
- /**
- * Concatenates several byte arrays.
- * @param bytes The byte arrays.
- * @return A single byte arrays containing all the bytes from the given arrays in the order they are given.
- */
- public static byte[] concat(byte[]... bytes) {
- int newSize = 0;
- for (byte[] b : bytes)
- if(b != null) newSize += b.length;
- byte[] dst = new byte[newSize];
- int currentPos = 0;
- int newPos;
- for (byte[] b : bytes) {
- if(b != null) {
- newPos = b.length;
- System.arraycopy(b, 0, dst, currentPos, newPos);
- currentPos += newPos;
- }
- }
- return dst;
- }
-
- /**
- * Converts a byte[] to a String, but only characters in ASCII between 32 and 127
- * @param bytes that are converted
- * @return converted String
- */
- public static String byteToStr(byte[] bytes) {
- char[] chars = new char[bytes.length];
- for (int i = 0, j = 0; i < bytes.length && j < chars.length; i++) {
- if (isLetter((char) bytes[i])) {
- chars[j] = (char) bytes[i];
- j++;
- }
- }
- return new String(chars);
- }
- /**
- * Determines if a character is in ASCII between 32 and 126
- * @param character that is checked
- * @return true if the character is between 32 and 126, else false
- */
- private static boolean isLetter(char character) {
- return (character > 31 && character < 127);
- }
-
- /**
- * Converts a byte array into a hexadecimal String, e.g. {0x00, 0x01} to "00, 01".
- * @param bytes that will be converted.
- * @return converted String.
- */
- public static String bytesToHexString(byte[] bytes) {
- char[] hexArray = "0123456789ABCDEF".toCharArray();
- int v;
- StringBuffer buffer = new StringBuffer();
- for(int j = 0; j < bytes.length; j++ ) {
- v = bytes[j] & 0xFF;
- buffer.append(hexArray[v >>> 4]);
- buffer.append(hexArray[v & 0x0F]);
- if(j < bytes.length-1) buffer.append(", ");
- }
- return buffer.toString();
- }
-
- /**
- * Converts a String into a byte array, e.g. "00, 01" to {0x00, 0x01}.
- * @param string that will be converted.
- * @return converted byte array.
- */
- public static byte[] hexStringToBytes(String string) {
- String[] hexStrings = string.split(", ");
- byte[] bytes = new byte[hexStrings.length];
- for(int j = 0; j < hexStrings.length; j++ ) {
- bytes[j] = (byte) ((Character.digit(hexStrings[j].charAt(0), 16) << 4)
- + Character.digit(hexStrings[j].charAt(1), 16));
- }
- return bytes;
- }
-
- /**
- * Produces a random String.
- * The String can be of random length with a maximum length, or it can be forced to have the length that was given.
- * @param length maximal / forced length of String.
- * @return random String.
- */
- public static String getRandomString(int length, boolean forceLength) {
- SecureRandom rndm = new SecureRandom();
- char[] c = new char[forceLength ? length : rndm.nextInt(length)];
- for(int i = 0; i < c.length; i++) {
- c[i] = (char) (rndm.nextInt(95)+32);
- }
- return new String(c);
- }
- }
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