def hasmorepayloads(self)if self num_iterations =self max_payloadsreturn false elsereturn true def getnextpayload(self,current_payload)convert into string payload "join(chr(xfor in current_payloadcall our simple mutator to fuzz the post payload self mutate_payload(payloadincrease the number of fuzzing attempts self num_iterations + return payload def reset(self)self num_iterations return we start by defining our bhpfuzzer class that extends the class iintruderpayloadgenerator we define the required class variables as well as add max_payloads and num_iterations variables so that we can keep track of when to let burp know we're finished fuzzing you could of course let the extension run forever if you likebut for testing we'll leave this in place next we implement the hasmorepayloads function that simply checks whether we have reached the maximum number of fuzzing iterations you could modify this to continually run the extension by always returning true the getnextpayload function is the one that receives the original http payload and it is here that we will be fuzzing the current_payload variable arrives as byte arrayso we convert this to string and then pass it to our fuzzing function mutate_payload we then increment the num_iterations variable and return the mutated payload our last function is the reset function that returns without doing anything now let' drop in the world' simplest fuzzing function that you can modify to your heart' content because this function is aware of the current payloadif you have tricky protocol that needs something speciallike crc checksum at the beginning of the payload or length fieldyou can do those calculations inside this function before returningwhich makes it extremely flexible add the following code to bhp_fuzzer pymaking sure that the mutate_payload function is tabbed into our bhpfuzzer classdef mutate_payload(self,original_payload)pick simple mutator or even call an external script picker random randint( , select random offset in the payload to mutate offset random randint( ,len(original_payload)- payload original_payload[:offsetrandom offset insert sql injection attempt if picker = payload +"'jam an xss attempt in if picker = payload +"alert('bhp!');repeat chunk of the original payload random number if picker =