--- a/java/sql-dk/src/info/globalcode/sql/dk/Functions.java	Sat Jan 04 19:38:20 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/Functions.java	Sat Jan 04 19:38:51 2014 +0100
@@ -141,4 +141,15 @@
 		Arrays.fill(array, ch);
 		return new String(array);
 	}
+	private final static char[] HEX_ALPHABET = "0123456789abcdef".toCharArray();
+
+	public static String toHex(byte[] bytes) {
+		char[] hexChars = new char[bytes.length * 2];
+		for (int j = 0; j < bytes.length; j++) {
+			int v = bytes[j] & 0xFF;
+			hexChars[j * 2] = HEX_ALPHABET[v >>> 4];
+			hexChars[j * 2 + 1] = HEX_ALPHABET[v & 0x0F];
+		}
+		return new String(hexChars);
+	}
 }