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#!/usr/bin/env python2
#
# File: test-afl-cov.py
#
# Purpose: Run afl-cov through a series of tests to ensure proper operations
# on the local system.
#
# License (GNU General Public License):
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301,
# USA
#
from shutil import rmtree, copy
from aflcov import *
import unittest
import time
import signal
import os
try:
import subprocess32 as subprocess
except ImportError:
import subprocess
class TestAflCov(unittest.TestCase):
### set a few paths
tmp_file = './tmp_cmd.out'
version_file = '../VERSION'
afl_cov_cmd = '../afl-cov'
single_generator = './afl/afl-cov-generator.sh'
parallel_generator = './afl/afl-cov-generator-parallel.sh'
afl_cov_live = './afl/afl-cov-generator-live.sh'
top_out_dir = './fwknop-afl.git/test/afl/fuzzing-output/server-access.out'
live_afl_cmd = './fuzzing-wrappers/server-access-redir.sh'
live_parallel_afl_cmd = './fuzzing-wrappers/server-access-parallel-redir.sh'
def do_cmd(self, cmd):
out = []
fh = open(self.tmp_file, 'w')
subprocess.call(cmd, stdin=None,
stdout=fh, stderr=subprocess.STDOUT, shell=True)
fh.close()
with open(self.tmp_file, 'r') as f:
for line in f:
out.append(line.rstrip('\n'))
return out
### start afl-cov in --live mode - this is for both single and
### parallel instance testing
def live_init(self):
if is_dir(os.path.dirname(self.top_out_dir)):
if is_dir(self.top_out_dir):
rmtree(self.top_out_dir)
else:
if not is_dir(os.path.dirname(self.top_out_dir)):
os.mkdir(os.path.dirname(self.top_out_dir))
### start up afl-cov in the background before AFL is running
try:
subprocess.Popen([self.afl_cov_live])
except OSError:
return False
time.sleep(2)
return True
def afl_stop(self):
### stop any afl-fuzz instances
self.do_cmd("%s --stop-afl --afl-fuzzing-dir %s" \
% (self.afl_cov_cmd, self.top_out_dir))
### now stop afl-cov
afl_cov_pid = get_running_pid(
self.top_out_dir + '/cov/afl-cov-status',
'afl_cov_pid\s+\:\s+(\d+)')
if afl_cov_pid:
os.kill(afl_cov_pid, signal.SIGTERM)
return
def test_version(self):
with open(self.version_file, 'r') as f:
version = f.readline().rstrip()
self.assertTrue(version
in ''.join(self.do_cmd("%s --version" % (self.afl_cov_cmd))),
"afl-cov --version does not match VERSION file")
def test_help(self):
self.assertTrue('--verbose'
in ''.join(self.do_cmd("%s -h" % (self.afl_cov_cmd))),
"--verbose not in -h output")
def test_stop_requires_fuzz_dir(self):
self.assertTrue('Must set'
in ''.join(self.do_cmd("%s --stop-afl" % (self.afl_cov_cmd))),
"--afl-fuzzing-dir missing from --stop-afl mode")
def test_func_search_requires_fuzz_dir(self):
self.assertTrue('Must set'
in ''.join(self.do_cmd("%s --func-search test" % (self.afl_cov_cmd))),
"--afl-fuzzing-dir missing from --func-search mode")
def test_line_search_requires_fuzz_dir(self):
self.assertTrue('Must set'
in ''.join(self.do_cmd("%s --line-search 1234" % (self.afl_cov_cmd))),
"--afl-fuzzing-dir missing from --line-search mode")
def test_live_parallel(self):
if not self.live_init():
return self.assertTrue(False, "Could not run generator cmd: %s" \
% (self.afl_cov_live))
### put the wrapper in place
wrapper ='fwknop-afl.git/test/afl/fuzzing-wrappers' + \
'/server-access-parallel-redir.sh'
if os.path.exists(wrapper):
os.remove(wrapper)
copy('afl/server-access-parallel-redir.sh', wrapper)
curr_dir = os.getcwd()
os.chdir('./fwknop-afl.git/test/afl')
### now start two copies of AFL
try:
subprocess.Popen([self.live_parallel_afl_cmd, "-M", "fuzzer01"])
except OSError:
os.chdir(curr_dir)
return self.assertTrue(False,
"Could not run live_parallel_afl_cmd: %s -M fuzzer01" \
% (self.live_parallel_afl_cmd))
try:
subprocess.Popen([self.live_parallel_afl_cmd, "-S", "fuzzer02"])
except OSError:
os.chdir(curr_dir)
return self.assertTrue(False,
"Could not run live_parallel_afl_cmd: %s -S fuzzer02" \
% (self.live_parallel_afl_cmd))
os.chdir(curr_dir)
time.sleep(3)
self.afl_stop()
if not (is_dir(self.top_out_dir + '/fuzzer01')
and is_dir(self.top_out_dir + '/fuzzer02')):
return self.assertTrue(False,
"fuzzer01 or fuzzer02 directory missing")
### check for the coverage directory since afl-cov should have
### seen the running AFL instance by now
return self.assertTrue(is_dir(self.top_out_dir + '/cov'),
"live coverage directory '%s' does not exist" \
% (self.top_out_dir + '/cov'))
def test_live(self):
if not self.live_init():
return self.assertTrue(False, "Could not run generator cmd: %s" \
% (self.afl_cov_live))
### put the wrapper in place
wrapper = 'fwknop-afl.git/test/afl/fuzzing-wrappers/server-access-redir.sh'
if os.path.exists(wrapper):
os.remove(wrapper)
copy('afl/server-access-redir.sh', wrapper)
curr_dir = os.getcwd()
os.chdir('./fwknop-afl.git/test/afl')
### now start AFL and let it run for longer than --sleep in the
### generator script - then look for the coverage directory
try:
subprocess.Popen([self.live_afl_cmd])
except OSError:
os.chdir(curr_dir)
return self.assertTrue(False,
"Could not run live_afl_cmd: %s" % (self.live_afl_cmd))
os.chdir(curr_dir)
time.sleep(3)
self.afl_stop()
### check for the coverage directory since afl-cov should have
### seen the running AFL instance by now
return self.assertTrue(is_dir(self.top_out_dir + '/cov'),
"live coverage directory '%s' does not exist" \
% (self.top_out_dir + '/cov'))
def test_queue_limit_5(self):
out_str = ''.join(self.do_cmd("%s --afl-queue-id-limit 5 --overwrite" \
% (self.single_generator)))
self.assertTrue('Final lcov web report' in out_str
and "New 'line' coverage: 1585" in out_str)
def test_queue_limit_5_cover_corpus(self):
out_str = ''.join(self.do_cmd("%s --afl-queue-id-limit 5 --overwrite --cover-corpus" \
% (self.single_generator)))
self.assertTrue('Final lcov web report' in out_str
and "New 'line' coverage: 1585" in out_str)
def test_overwrite_dir(self):
### generate coverage, and then try to regenerate without --overwrite
self.do_cmd("%s --afl-queue-id-limit 1 --overwrite" \
% (self.single_generator))
out_str = ''.join(self.do_cmd("%s --afl-queue-id-limit 1" \
% (self.single_generator)))
self.assertTrue("use --overwrite" in out_str,
"Missing --overwrite not caught")
def test_queue_limit_5_parallel(self):
out_str = ''.join(self.do_cmd("%s --afl-queue-id-limit 5 --overwrite" \
% (self.parallel_generator)))
self.assertTrue('Final lcov web report' in out_str
and "New 'line' coverage: 977" in out_str
and "Imported 145 new test cases" in out_str
and "Imported 212 new test cases" in out_str)
def test_queue_limit_5_parallel_cover_corpus(self):
out_str = ''.join(self.do_cmd("%s --afl-queue-id-limit 5 --overwrite --cover-corpus" \
% (self.parallel_generator)))
self.assertTrue('Final lcov web report' in out_str
and "New 'line' coverage: 977" in out_str
and "Imported 145 new test cases" in out_str
and "Imported 212 new test cases" in out_str)
if __name__ == "__main__":
unittest.main()
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