Add new targeted script add_junk

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Standalone script 'PrivateMethodAccess.js'
 - Variant script 'AddUrlParams.js'
 - Extender script 'ScanMonitor.js'
+- Targeted script 'add_junk.py'
 ### Changed
 - Add cautionary note to help and readme.
 - Maintenance and documentation changes.

targeted/add_junk.py

@@ -0,0 +1,200 @@
+#This script adds some junk data to the selected request and sends it to a new requester tab
+#Script created to work as https://github.com/assetnote/nowafpls
+#Written by @5ubterranean_
+#If you want to put a Custom Size select "Custom" as the size
+
+import java.awt.event;
+
+import json
+import re
+from org.parosproxy.paros.view import AbstractFrame
+from javax.swing import JLabel
+from javax.swing import JMenuBar
+from javax.swing import JMenu
+from javax.swing import JMenuItem
+from javax.swing import JFrame
+from javax.swing import JTextField
+from javax.swing import JButton
+from javax.swing import JComboBox
+requester = control.getExtensionLoader().getExtension("ExtensionRequester")
+
+#Checks generated with IA will check the Content-type header first
+def is_json(Ctype, text):
+    if "application/json" in Ctype:
+        return True
+    try:
+        json.loads(text)
+        return True
+    except:
+        return False
+
+def is_xml(Ctype, xml_string):
+    if "application/xml" in Ctype:
+        return True
+
+    if xml_string[0] != "<" or xml_string[-1] != ">":
+        return False
+
+    # Remove leading and trailing whitespace
+    xml_string = xml_string.strip()
+
+    # Check if the string starts with XML declaration (optional)
+    xml_declaration_pattern = r'^\s*<\?xml\s+version="1\.0"\s*\?>'
+    if re.match(xml_declaration_pattern, xml_string):
+        # Remove the XML declaration from the string
+        xml_string = re.sub(xml_declaration_pattern, '', xml_string)
+
+    # Check for well-formedness
+    # A simplistic approach to check if tags are properly nested and closed
+    tag_pattern = r'</?([a-zA-Z_][\w.-]*)\s*[^>]*>'
+    tags = re.findall(tag_pattern, xml_string)
+
+    stack = []
+    print(tags)
+    #Checks if tag appears twice (open and close), will fail with autoclosing tags
+    for tag in tags:
+        if tag not in stack:
+            stack.append(tag)
+        else:
+            stack.remove(tag)
+
+    # Check if stack is empty at the end
+    print(stack)
+    return len(stack) == 0
+
+def is_http_post_form(Ctype, text):
+    if "application/x-www-form-urlencoded" in Ctype:
+        return True
+    # Simple check for key=value pairs. This is a basic check and may not cover all cases.
+    return bool(re.match(r'^(?:[^\s=&]+=[^\s=&]+)(?:&[^\s=&]+=[^\s=&]+)*$', text))
+
+def is_multipart_data(Ctype, text):
+
+    if "multipart/form-data" in Ctype:
+        return True
+    # Check if the text has the typical structure of multipart/form-data
+    boundary_pattern = r'--([a-zA-Z0-9]+)'
+    parts = text.split('\n')
+
+    if len(parts) < 2:
+        return False
+
+    for part in parts:
+        if re.search(boundary_pattern, part):
+            return True
+    return False
+
+def check_format(Ctype, text):
+    if is_json(Ctype, text):
+        return "JSON"
+    elif is_xml(Ctype, text):
+        return "XML"
+    elif is_http_post_form(Ctype, text):
+        return "POST FORM"
+    elif is_multipart_data(Ctype, text):
+        return "MULTIPART DATA"
+
+def padXML(HTTPBody, padding):
+    padBody =  "<!--" + "a" * (padding - 7) + "-->" + HTTPBody
+    return padBody
+
+def padJSON(HTTPBody, padding):
+    padBody = '{"junk":"' + "0" * (padding - 10) + '"' + ',' + HTTPBody[1:len(HTTPBody)]
+    return padBody
+
+def padFORM(HTTPBody, padding):
+    padBody = "a=" + "0" * (padding - 2) + "&" + HTTPBody
+    return padBody
+
+def padMultipart(cType, HTTPBody, padding):    
+    typeSplit = cType.split(";")
+    i = 0
+    while i < len(typeSplit):
+        if "boundary" in typeSplit[i]:
+            boundary = typeSplit[i]
+            break
+        else:
+            i = i + 1
+    padBody = "--" + boundary[10:len(boundary)] + "\n" + 'Content-Disposition: form-data; name="junk_data"' + "\n\n" + "0" * (padding - (len(boundary[10:len(boundary)]) + 48)) + "\n\n" + HTTPBody
+    return padBody
+
+def invokeWith(msg):
+    #Clonning request first to avoid making changes to the original request
+    cloned = msg.cloneRequest()
+    #Defines values for pop up box
+    frame = JFrame("Junk size")
+    frame.setLocation(100,100)
+    frame.setSize(460,180)
+    frame.setLayout(None)
+    lbl1 = JLabel("Type: ")
+    lbl1.setBounds(60,20,60,20)
+    typelist = ["JSON","XML", "POST FORM","MULTIPART DATA"]
+    txt1 = JComboBox(typelist)
+    txt1.setBounds(130,20,200,20)
+    lbl2 = JLabel("Size: ")
+    lbl2.setBounds(60,50,60,20)
+    choices = ["8 KB","16 KB", "32 KB","64 KB","128 KB","1024 KB","CUSTOM"]
+    txt2 = JComboBox(choices)
+    txt2.setBounds(130,50,200,20)
+    lbl3 = JLabel("Custom: ")
+    lbl3.setBounds(60,80,100,20)
+    txt3 = JTextField(100)
+    txt3.setBounds(130,80,200,20)
+
+    def getValues(event):
+        #Reading Size for the junk data
+        if str(txt2.getSelectedItem()) == "8 KB":
+            padSize = 8000
+        elif str(txt2.getSelectedItem()) == "16 KB":
+            padSize = 16000
+        elif str(txt2.getSelectedItem()) == "32 KB":
+            padSize = 32000
+        elif str(txt2.getSelectedItem()) == "64 KB":
+            padSize = 64000
+        elif str(txt2.getSelectedItem()) == "128 KB":
+            padSize = 128000
+        elif str(txt2.getSelectedItem()) == "1024 KB":
+            padSize = 1024000
+        elif str(txt2.getSelectedItem()) == "CUSTOM":
+            padSize = int(txt3.getText())
+
+        #Select content type according to what is selected on the combo box, done in case user changed the type due the autodetect failing
+        contentFormat = txt1.getSelectedItem()
+
+        #Create new body with the junk data added        
+        if contentFormat == "JSON":
+            newBody = padJSON(cloned.getRequestBody().toString(), padSize)
+        elif contentFormat == "XML":
+            newBody = padXML(cloned.getRequestBody().toString(), padSize)
+        elif contentFormat == "POST FORM":
+            newBody = padFORM(cloned.getRequestBody().toString(), padSize)
+        elif contentFormat == "MULTIPART DATA":
+            Ctype = cloned.getRequestHeader().getHeader("Content-Type")
+            newBody = padMultipart(Ctype, cloned.getRequestBody().toString(), padSize)
+        cloned.setRequestBody(newBody)
+        cloned.getRequestHeader().setContentLength(cloned.getRequestBody().length())
+        #Sends request to a new requester tab
+        requester.newRequesterPane(cloned)
+        #Closes pop up box
+        frame.dispose()
+
+    btn = JButton("Submit", actionPerformed = getValues)
+    btn.setBounds(160,110,100,20)        
+    frame.add(lbl1)
+    frame.add(txt1)
+    frame.add(lbl2)
+    frame.add(txt2)
+    frame.add(lbl3)
+    frame.add(txt3)
+    frame.add(btn)
+    frame.setVisible(True)
+    Ctype = cloned.getRequestHeader().getHeader("Content-Type")
+    contentFormat = check_format(Ctype, cloned.getRequestBody().toString())
+    if contentFormat == "JSON":
+        txt1.setSelectedIndex(0)
+    elif contentFormat == "XML":
+        txt1.setSelectedIndex(1)
+    elif contentFormat == "POST FORM":
+        txt1.setSelectedIndex(2)
+    elif contentFormat == "MULTIPART DATA":
+        txt1.setSelectedIndex(3)