From 16635fcbc848be84e7953d6a8c84b57172124cf0 Mon Sep 17 00:00:00 2001
From: Alexandre ZANNI <16578570+noraj@users.noreply.github.com>
Date: Thu, 22 Nov 2018 01:54:28 +0100
Subject: [PATCH] Create mixedcase.py

---
 tamper/mixedcase.py | 53 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 tamper/mixedcase.py

diff --git a/tamper/mixedcase.py b/tamper/mixedcase.py
new file mode 100644
index 000000000..89c6c7021
--- /dev/null
+++ b/tamper/mixedcase.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2018 sqlmap developers (http://sqlmap.org/)
+See the file 'LICENSE' for copying permission
+"""
+
+import re
+
+from lib.core.common import randomRange
+from lib.core.data import kb
+from lib.core.enums import PRIORITY
+
+__priority__ = PRIORITY.NORMAL
+
+def dependencies():
+    pass
+
+def tamper(payload, **kwargs):
+    """
+    Replaces each keyword character with mixed case value (e.g. SELECT -> SeLeCt)
+
+    Tested against:
+        * SQLite 3
+
+    Notes:
+        * Useful to bypass very weak and bespoke web application firewalls
+          that has poorly written permissive regular expressions
+        * This tamper script should work against all (?) databases
+        * Usefull when some keywords like 'as' are part or words like 'last'
+          and that randomcase temper script get you caught because it outputted
+          'lasT' ('as' is flagged where 'aS' or 'As' is not).
+    """
+
+    retVal = payload
+
+    if payload:
+        for match in re.finditer(r"\b[A-Za-z_]+\b", retVal):
+            word = match.group()
+
+            if word.upper() in kb.keywords or ("%s(" % word) in payload:
+                while True:
+                    _ = ""
+
+                    for i in xrange(len(word)):
+                        _ += word[i].upper() if i%2==0 else word[i].lower()
+
+                    if len(_) > 1 and _ not in (_.lower(), _.upper()):
+                        break
+
+                retVal = retVal.replace(word, _)
+
+    return retVal