private String makeSHA1Hash(String input) throws NoSuchAlgorithmException {
			MessageDigest md = MessageDigest.getInstance("SHA1");
			md.reset();
			byte[] buffer = input.getBytes();
			md.update(buffer);
			byte[] digest = md.digest();
			String hexStr = "";
			for (int i = 0; i < digest.length; i++) {
				hexStr +=  Integer.toString( ( digest[i] & 0xff ) + 0x100, 16).substring( 1 );
			}
			return hexStr;
		}