Added one more tamper script from Roberto Salgado and minor adjustment to others

tamper/percentage.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+
+"""
+$Id$
+
+Copyright (c) 2006-2011 sqlmap developers (http://www.sqlmap.org/)
+See the file 'doc/COPYING' for copying permission
+"""
+
+import os
+import string
+
+from lib.core.enums import PRIORITY
+from lib.core.common import singleTimeWarnMessage
+
+__priority__ = PRIORITY.LOW
+
+def dependencies():
+    singleTimeWarnMessage("tamper script '%s' is only meant to be run against ASP web applications" % os.path.basename(__file__).split(".")[0])
+
+def tamper(payload):
+    """
+    Adds a percentage sign ('%') infront of each character
+
+    Example:
+        * Input: SELECT FIELD FROM TABLE
+        * Output: %S%E%L%E%C%T %F%I%E%L%D %F%R%O%M %T%A%B%L%E
+
+    Requirement:
+        * ASP
+
+    Tested against:
+        * Microsoft SQL Server 2000, 2005
+        * MySQL 5.1.56, 5.5.11
+        * PostgreSQL 9.0
+
+    Notes:
+        * Useful to bypass weak and bespoke web application firewalls
+    """
+
+    if payload:
+        retVal = ""
+        i = 0
+
+        while i < len(payload):
+            if payload[i] == '%' and (i < len(payload) - 2) and payload[i+1] in string.hexdigits and payload[i+2] in string.hexdigits:
+                retVal += payload[i:i+3]
+                i += 3
+            elif payload[i] != ' ':
+                retVal += '%%%s' % payload[i]
+                i += 1
+            else:
+                retVal += payload[i]
+                i += 1
+
+    return retVal