title: Getting javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher?
body: <p>Using tomcat, I have two web-applications i.e app1 and app2. I sent url from app1 in encrypted form (using below code) to app2 . Then at app2 
  I decrypted this encrypted url. But am getting below exception at line 50 of <code>decryp</code> method. </p>
  
  <pre><code>"Getting javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher"
  </code></pre>
  
  <p>Though for debugging when I try to decrypt(using same code) the encrypted url at app1, it works fine. But not able to figure out what causing this exception at app2?</p>
  
  <p><strong>Here is the code</strong></p>
  
  <pre><code>import java.security.Key;
  
  import javax.crypto.Cipher;
  import javax.crypto.spec.SecretKeySpec;
  
  import sun.misc.BASE64Decoder;
  import sun.misc.BASE64Encoder;
  
  public class AESEncryptionDecryptionTest {
  
      private static final String ALGORITHM       = "AES";
      private static final String myEncryptionKey = "ThisIsFoundation";
      private static final String UNICODE_FORMAT  = "UTF8";
  
      public static String encrypt(String valueToEnc) throws Exception {
          Key key = generateKey();
          Cipher c = Cipher.getInstance(ALGORITHM);
          c.init(Cipher.ENCRYPT_MODE, key);  
          byte[] encValue = c.doFinal(valueToEnc.getBytes());
          String encryptedValue = new BASE64Encoder().encode(encValue);
          return encryptedValue;
      }
  
      public static String decrypt(String encryptedValue) throws Exception {
           Key key = generateKey();
           Cipher c = Cipher.getInstance(ALGORITHM);
           c.init(Cipher.DECRYPT_MODE, key);
           byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedValue);
           byte[] decValue = c.doFinal(decordedValue);//////////LINE 50
           String decryptedValue = new String(decValue);
           return decryptedValue;
      }
  
      private static Key generateKey() throws Exception {
           byte[] keyAsBytes;
           keyAsBytes = myEncryptionKey.getBytes(UNICODE_FORMAT);
           Key key = new SecretKeySpec(keyAsBytes, ALGORITHM);
           return key;
      }
  
      public static void main(String[] args) throws Exception {
  
           String value = "password1";
           String valueEnc = AESEncryptionDecryptionTest.encrypt(value);
           String valueDec = AESEncryptionDecryptionTest.decrypt(valueEnc);
  
           System.out.println("Plain Text : " + value);
           System.out.println("Encrypted : " + valueEnc);
           System.out.println("Decrypted : " + valueDec);
      }
  
  }
  </code></pre>