How Encrypt the GWT String from Client Side

How Encrypt the GWT String from Client Side
  • Download the jar file from link.
  • Add the following in the .gwt.xml file 
  •         <inherits name=’com.googlecode.gwt.crypto.Crypto’/>


  • Use the following code in the class
                  String getSHA1for(String text) 
  SHA1Digest sd = new SHA1Digest();
  byte[] bs = text.getBytes();
  sd.update(bs, 0, bs.length);
  byte[] result = new byte[20];
  sd.doFinal(result, 0);
  return byteArrayToHexString(result);
String byteArrayToHexString(final byte[] b) 
  final StringBuffer sb = new StringBuffer(b.length * 2);
  for (int i = 0, len = b.length; i < len; i++) {
    int v = b[i] & 0xff;
    if (v < 16) sb.append(‘0’);
  return sb.toString().toUpperCase();

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