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jsonmenu.py
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jsonmenu.py
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# -*- coding: utf-8 -*-
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
from array import array
import json
from gds.burp.models import HttpRequest
from gds.burp.menu import MenuItem
encoder = json.JSONEncoder(separators=(',', ':'))
class JSONIntruderMenu(MenuItem):
CAPTION = 'send to intruder (json request)'
def menuItemClicked(self, menuItemCaption, messageInfo):
for message in messageInfo:
request = HttpRequest(message, _burp=self.burp)
if 'json' not in request.content_type:
continue
body = StringIO()
body.write(request.raw.split('\r\n\r\n', 1)[0])
body.write('\r\n\r\n')
try:
json_obj = json.loads(request.body)
message, offsets = getJsonInsertionPointOffsets(body, json_obj)
except Exception:
self.log.exception('Error decoding json body: %r',
request.body)
continue
self.burp.sendToIntruder(
request.host, request.port, request.is_secure,
message, offsets)
return
class JSONActiveScannerMenu(MenuItem):
CAPTION = 'actively scan this item (json request)'
def menuItemClicked(self, menuItemCaption, messageInfo):
for message in messageInfo:
request = HttpRequest(message, _burp=self.burp)
if 'json' not in request.content_type:
continue
body = StringIO()
body.write(request.raw.split('\r\n\r\n', 1)[0])
body.write('\r\n\r\n')
try:
json_obj = json.loads(request.body)
message, offsets = getJsonInsertionPointOffsets(body, json_obj)
except Exception:
self.log.exception('Error decoding json body: %r',
request.body)
continue
self.burp.doActiveScan(
request.host, request.port, request.is_secure,
message, offsets)
return
def getJsonInsertionPointOffsets(fileobj, jsonobj):
offsets = []
dict_level = 0
list_level = 0
at_key = False
at_value = False
for s in encoder.iterencode(jsonobj):
if s == '{':
dict_level += 1
at_key = True
at_value = False
fileobj.write(s)
continue
elif s == '}':
dict_level -= 1
at_value = False
at_key = False
fileobj.write(s)
continue
elif s == '[':
list_level += 1
fileobj.write(s)
continue
elif s == ']':
list_level -= 1
at_value = False
fileobj.write(s)
continue
elif s == ':':
at_key = False
at_value = True
fileobj.write(s)
continue
elif s == ',':
if dict_level > 0:
at_value = False
fileobj.write(s)
continue
else:
if at_value or (s.startswith('[') and len(s) > 1) or \
(s.startswith(',') and len(s) > 1):
if s.startswith('['):
list_level += 1
if s.startswith(('["', ',"')):
start = fileobj.tell() + 2
elif s.startswith(('[', ',', '"')):
start = fileobj.tell() + 1
else:
start = fileobj.tell()
fileobj.write(s)
if s.endswith('"'):
end = fileobj.tell() - 1
else:
end = fileobj.tell()
offsets.append(array('i', (start, end)))
else:
fileobj.write(s)
return fileobj.getvalue(), offsets