"""
Copyright 2015-2016 @_rc0r <hlt99@blinkenshell.org>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import os
import subprocess
import afl_utils
import threading
class VerifyThread(threading.Thread):
def __init__(self, thread_id, timeout_secs, target_cmd, in_queue, out_queue, in_queue_lock, out_queue_lock):
threading.Thread.__init__(self)
self.id = thread_id
self.timeout_secs = timeout_secs
self.target_cmd = target_cmd
self.in_queue = in_queue
self.out_queue = out_queue
self.in_queue_lock = in_queue_lock
self.out_queue_lock = out_queue_lock
self.exit = False
def run(self):
while not self.exit:
self.in_queue_lock.acquire()
if not self.in_queue.empty():
cs = self.in_queue.get()
self.in_queue_lock.release()
cmd = self.target_cmd.replace("@@", os.path.abspath(cs))
cs_fd = open(os.path.abspath(cs))
try:
if afl_utils.afl_collect.stdin_mode(self.target_cmd):
v = subprocess.call(cmd.split(), stdin=cs_fd, stderr=subprocess.DEVNULL,
stdout=subprocess.DEVNULL, timeout=self.timeout_secs)
else:
v = subprocess.call(cmd.split(), stderr=subprocess.DEVNULL,
stdout=subprocess.DEVNULL, timeout=self.timeout_secs)
# check if process was terminated/stopped by signal
if not os.WIFSIGNALED(v) and not os.WIFSTOPPED(v):
self.out_queue_lock.acquire()
self.out_queue.put((cs, 'invalid'))
self.out_queue_lock.release()
else:
# need extension (add uninteresting signals):
# following signals don't indicate hard crashes: 1
# os.WTERMSIG(v) ?= v & 0x7f ???
if (os.WTERMSIG(v) or os.WSTOPSIG(v)) in [1]:
self.out_queue_lock.acquire()
self.out_queue.put((cs, 'invalid'))
self.out_queue_lock.release()
# debug
# else:
# if os.WIFSIGNALED(v):
# print("%s: sig: %d (%d)" % (cs, os.WTERMSIG(v), v))
# elif os.WIFSTOPPED(v):
# print("%s: sig: %d (%d)" % (cs, os.WSTOPSIG(v), v))
except subprocess.TimeoutExpired:
self.out_queue_lock.acquire()
self.out_queue.put((cs, 'timeout'))
self.out_queue_lock.release()
except Exception:
pass
cs_fd.close()
else:
self.in_queue_lock.release()
self.exit = True
class GdbThread(threading.Thread):
def __init__(self, thread_id, gdb_cmd, out_dir, grep_for, out_queue, out_queue_lock):
threading.Thread.__init__(self)
self.id = thread_id
self.gdb_cmd = gdb_cmd
self.out_dir = out_dir
self.out_queue = out_queue
self.out_queue_lock = out_queue_lock
self.grep_for = grep_for
def run(self):
try:
script_output = subprocess.check_output(" ".join(self.gdb_cmd), shell=True, stderr=subprocess.DEVNULL,
stdin=subprocess.DEVNULL)
except (subprocess.TimeoutExpired, subprocess.CalledProcessError) as e:
script_output = e.output
script_output = script_output.decode(errors='replace').splitlines()
for line in script_output:
matching = [line.replace(g, '') for g in self.grep_for if g in line]
matching = " ".join(matching).strip('\' ')
matching = matching.replace(self.out_dir, '')
if len(matching) > 0:
self.out_queue_lock.acquire()
self.out_queue.put(matching)
self.out_queue_lock.release()
class AflTminThread(threading.Thread):
def __init__(self, thread_id, tmin_cmd, target_cmd, output_dir, in_queue, out_queue, in_queue_lock, out_queue_lock):
threading.Thread.__init__(self)
self.id = thread_id
self.target_cmd = target_cmd
self.output_dir = output_dir
self.in_queue = in_queue
self.out_queue = out_queue
self.in_queue_lock = in_queue_lock
self.out_queue_lock = out_queue_lock
self.tmin_cmd = tmin_cmd
self.exit = False
def run(self):
while not self.exit:
self.in_queue_lock.acquire()
if not self.in_queue.empty():
f = self.in_queue.get()
self.in_queue_lock.release()
cmd = "%s-i %s -o %s -- %s" % (self.tmin_cmd, f, os.path.join(self.output_dir, os.path.basename(f)),
self.target_cmd)
try:
subprocess.call(cmd, stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL, shell=True)
self.out_queue_lock.acquire()
self.out_queue.put(os.path.join(self.output_dir, os.path.basename(f)))
self.out_queue_lock.release()
# except subprocess.CalledProcessError as e:
# print("afl-tmin failed with exit code %d!" % e.returncode)
except subprocess.CalledProcessError:
pass
except Exception:
pass
else:
self.in_queue_lock.release()
self.exit = True
