src/java/iotcloud/Table.java

   1 package iotcloud;
   2 import java.util.HashMap;
   3 import javax.crypto.spec.*;
   4 import javax.crypto.*;
   5
   6 public class Table {
   7         int numslots;
   8         HashMap table=new HashMap();
   9         CloudComm cloud;
  10         private Mac hmac;
  11
  12         public Table(String baseurl, String password) {
  13                 initCloud(baseurl, password);
  14         }
  15
  16         private void initCloud(String baseurl, String password) {
  17                 try {
  18                         SecretKeySpec secret=getKey(password);
  19                         Cipher encryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
  20                         encryptCipher.init(Cipher.ENCRYPT_MODE, secret);
  21                         Cipher decryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
  22                         decryptCipher.init(Cipher.DECRYPT_MODE, secret);
  23                         hmac = Mac.getInstance("HmacSHA256");
  24                         hmac.init(secret);
  25                         cloud=new CloudComm(baseurl, encryptCipher, decryptCipher, hmac);
  26                 } catch (Exception e) {
  27                         throw new Error("Failed To Initialize Ciphers");
  28                 }
  29         }
  30
  31         private SecretKeySpec getKey(String password) {
  32                 try {
  33                         PBEKeySpec keyspec = new PBEKeySpec(password.toCharArray());
  34                         SecretKey key = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256").generateSecret(keyspec);
  35                         SecretKeySpec secret = new SecretKeySpec(key.getEncoded(), "AES");
  36                         return secret;
  37                 } catch (Exception e) {
  38                         throw new Error("Failed generating key.");
  39                 }
  40         }
  41
  42
  43
  44 }