From 38e7dd2b9efbd9c6cda47774630a82660d3156b3 Mon Sep 17 00:00:00 2001 From: h1994st Date: Wed, 4 Mar 2020 01:09:37 -0500 Subject: Update examples of the custom mutator - Merge `examples/python_mutators` into `examples/custom_mutators` - Remove `examples/python_mutators` - Update existing examples to demonstrate new APIs --- examples/python_mutators/simple-chunk-replace.py | 59 ------------------------ 1 file changed, 59 deletions(-) delete mode 100644 examples/python_mutators/simple-chunk-replace.py (limited to 'examples/python_mutators/simple-chunk-replace.py') diff --git a/examples/python_mutators/simple-chunk-replace.py b/examples/python_mutators/simple-chunk-replace.py deleted file mode 100644 index 218dd4f8..00000000 --- a/examples/python_mutators/simple-chunk-replace.py +++ /dev/null @@ -1,59 +0,0 @@ -#!/usr/bin/env python -# encoding: utf-8 -''' -Simple Chunk Cross-Over Replacement Module for AFLFuzz - -@author: Christian Holler (:decoder) - -@license: - -This Source Code Form is subject to the terms of the Mozilla Public -License, v. 2.0. If a copy of the MPL was not distributed with this -file, You can obtain one at http://mozilla.org/MPL/2.0/. - -@contact: choller@mozilla.com -''' - -import random - -def init(seed): - ''' - Called once when AFLFuzz starts up. Used to seed our RNG. - - @type seed: int - @param seed: A 32-bit random value - ''' - # Seed our RNG - random.seed(seed) - return 0 - -def fuzz(buf, add_buf): - ''' - Called per fuzzing iteration. - - @type buf: bytearray - @param buf: The buffer that should be mutated. - - @type add_buf: bytearray - @param add_buf: A second buffer that can be used as mutation source. - - @rtype: bytearray - @return: A new bytearray containing the mutated data - ''' - # Make a copy of our input buffer for returning - ret = bytearray(buf) - - # Take a random fragment length between 2 and 32 (or less if add_buf is shorter) - fragment_len = random.randint(1, min(len(add_buf), 32)) - - # Determine a random source index where to take the data chunk from - rand_src_idx = random.randint(0, len(add_buf) - fragment_len) - - # Determine a random destination index where to put the data chunk - rand_dst_idx = random.randint(0, len(buf)) - - # Make the chunk replacement - ret[rand_dst_idx:rand_dst_idx + fragment_len] = add_buf[rand_src_idx:rand_src_idx + fragment_len] - - # Return data - return ret -- cgit 1.4.1