DES encrypting/decrypting for text data

SimpleDESCryptoProvider

/*
 * DES encrypting/decrypting for text data
 */
 
 
import java.security.*;
import javax.crypto.*;
 
public class SimpleDESCryptoProvider {
    
    public static final String seed = "AM6ROFFBABFAKILLEMALL";
 
    public static String decrypt(String src)
    {
 
       try{
        javax.crypto.spec.SecretKeySpec
             key = new  javax.crypto.spec.SecretKeySpec(getRawKey(), "DES");
        Cipher ecipher = Cipher.getInstance("DES");
        ecipher.init(Cipher.DECRYPT_MODE, key);
    
        byte[] utf8 = toByte(src);
 
        // Descrypt
        byte[] dec= ecipher.doFinal(utf8);
 
        return new String( dec  );
        }
        catch(Exception exc )
        {
           try{
               exc.printStackTrace();
            }catch(Exception exc2){}
 
        }
       return src;
 
    }
 
     public static String encrypt(String src)
    {
       try{
        javax.crypto.spec.SecretKeySpec
             key = new  javax.crypto.spec.SecretKeySpec(getRawKey(), "DES");
        Cipher ecipher = Cipher.getInstance("DES");
        ecipher.init(Cipher.ENCRYPT_MODE, key);
        
        byte[] utf8 = src.getBytes("UTF8");
 
        // Encrypt
        byte[] enc = ecipher.doFinal(utf8);
 
        return toHex(enc);
        }
        catch(Exception exc )
        {
           try{
              exc.printStackTrace();
            }catch(Exception exc2){}
 
        }
       return src;
    }
 
     private static byte[] getRawKey() throws Exception {
     KeyGenerator kgen = KeyGenerator.getInstance("DES");
  SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
  sr.setSeed(seed.getBytes());
     kgen.init(56, sr);
     SecretKey skey = kgen.generateKey();
     byte[] raw = skey.getEncoded();
     return raw;
 }
 
    // эти методы используются для конвертации байтов в ASCII символы
 
     public static String toHex(String txt) {
  return toHex(txt.getBytes());
 }
 public static String fromHex(String hex) {
  return new String(toByte(hex));
 }
 
 public static byte[] toByte(String hexString) {
  int len = hexString.length()/2;
  byte[] result = new byte[len];
  for (int i = 0; i < len; i++)
   result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16).byteValue();
  return result;
 }
 
 public static String toHex(byte[] buf) {
  if (buf == null)
   return "";
  StringBuffer result = new StringBuffer(2*buf.length);
  for (int i = 0; i < buf.length; i++) {
   appendHex(result, buf[i]);
  }
  return result.toString();
 }
 private final static String HEX = "0123456789ABCDEF";
 private static void appendHex(StringBuffer sb, byte b) {
  sb.append(HEX.charAt((b>>4)&0x0f)).append(HEX.charAt(b&0x0f));
 }
}
Использование класса может выглядеть следующим образом:

String s = "Привет.";
        String d = SimpleDESCryptoProvider.encrypt(s);
        System.out.println(d);
        s = SimpleDESCryptoProvider.decrypt(d);
        System.out.println(s);