819 lines
26 KiB
Python
Executable File
819 lines
26 KiB
Python
Executable File
#!/usr/bin/env python
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# ################################################################
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# Copyright (c) 2016-present, Facebook, Inc.
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# All rights reserved.
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#
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# This source code is licensed under both the BSD-style license (found in the
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# LICENSE file in the root directory of this source tree) and the GPLv2 (found
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# in the COPYING file in the root directory of this source tree).
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# ##########################################################################
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import argparse
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import contextlib
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import os
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import re
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import shutil
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import subprocess
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import sys
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import tempfile
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def abs_join(a, *p):
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return os.path.abspath(os.path.join(a, *p))
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# Constants
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FUZZ_DIR = os.path.abspath(os.path.dirname(__file__))
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CORPORA_DIR = abs_join(FUZZ_DIR, 'corpora')
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TARGETS = [
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'simple_round_trip',
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'stream_round_trip',
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'block_round_trip',
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'simple_decompress',
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'stream_decompress',
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'block_decompress',
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]
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ALL_TARGETS = TARGETS + ['all']
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FUZZ_RNG_SEED_SIZE = 4
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# Standard environment variables
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CC = os.environ.get('CC', 'cc')
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CXX = os.environ.get('CXX', 'c++')
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CPPFLAGS = os.environ.get('CPPFLAGS', '')
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CFLAGS = os.environ.get('CFLAGS', '-O3')
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CXXFLAGS = os.environ.get('CXXFLAGS', CFLAGS)
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LDFLAGS = os.environ.get('LDFLAGS', '')
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MFLAGS = os.environ.get('MFLAGS', '-j')
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# Fuzzing environment variables
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LIB_FUZZING_ENGINE = os.environ.get('LIB_FUZZING_ENGINE', 'libregression.a')
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AFL_FUZZ = os.environ.get('AFL_FUZZ', 'afl-fuzz')
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DECODECORPUS = os.environ.get('DECODECORPUS',
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abs_join(FUZZ_DIR, '..', 'decodecorpus'))
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# Sanitizer environment variables
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MSAN_EXTRA_CPPFLAGS = os.environ.get('MSAN_EXTRA_CPPFLAGS', '')
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MSAN_EXTRA_CFLAGS = os.environ.get('MSAN_EXTRA_CFLAGS', '')
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MSAN_EXTRA_CXXFLAGS = os.environ.get('MSAN_EXTRA_CXXFLAGS', '')
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MSAN_EXTRA_LDFLAGS = os.environ.get('MSAN_EXTRA_LDFLAGS', '')
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def create(r):
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d = os.path.abspath(r)
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if not os.path.isdir(d):
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os.mkdir(d)
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return d
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def check(r):
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d = os.path.abspath(r)
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if not os.path.isdir(d):
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return None
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return d
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@contextlib.contextmanager
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def tmpdir():
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dirpath = tempfile.mkdtemp()
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try:
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yield dirpath
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finally:
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shutil.rmtree(dirpath, ignore_errors=True)
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def parse_targets(in_targets):
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targets = set()
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for target in in_targets:
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if not target:
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continue
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if target == 'all':
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targets = targets.union(TARGETS)
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elif target in TARGETS:
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targets.add(target)
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else:
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raise RuntimeError('{} is not a valid target'.format(target))
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return list(targets)
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def targets_parser(args, description):
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parser = argparse.ArgumentParser(prog=args.pop(0), description=description)
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parser.add_argument(
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'TARGET',
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nargs='*',
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type=str,
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help='Fuzz target(s) to build {{{}}}'.format(', '.join(ALL_TARGETS)))
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args, extra = parser.parse_known_args(args)
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args.extra = extra
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args.TARGET = parse_targets(args.TARGET)
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return args
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def parse_env_flags(args, flags):
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"""
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Look for flags set by environment variables.
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"""
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san_flags = ','.join(re.findall('-fsanitize=((?:[a-z]+,?)+)', flags))
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nosan_flags = ','.join(re.findall('-fno-sanitize=((?:[a-z]+,?)+)', flags))
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def set_sanitizer(sanitizer, default, san, nosan):
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if sanitizer in san and sanitizer in nosan:
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raise RuntimeError('-fno-sanitize={s} and -fsanitize={s} passed'.
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format(s=sanitizer))
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if sanitizer in san:
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return True
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if sanitizer in nosan:
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return False
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return default
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san = set(san_flags.split(','))
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nosan = set(nosan_flags.split(','))
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args.asan = set_sanitizer('address', args.asan, san, nosan)
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args.msan = set_sanitizer('memory', args.msan, san, nosan)
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args.ubsan = set_sanitizer('undefined', args.ubsan, san, nosan)
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args.sanitize = args.asan or args.msan or args.ubsan
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return args
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def compiler_version(cc, cxx):
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"""
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Determines the compiler and version.
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Only works for clang and gcc.
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"""
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cc_version_bytes = subprocess.check_output([cc, "--version"])
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cxx_version_bytes = subprocess.check_output([cxx, "--version"])
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if cc_version_bytes.startswith(b'clang'):
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assert(cxx_version_bytes.startswith(b'clang'))
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compiler = 'clang'
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if cc_version_bytes.startswith(b'gcc'):
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assert(cxx_version_bytes.startswith(b'g++'))
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compiler = 'gcc'
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version_regex = b'([0-9])+\.([0-9])+\.([0-9])+'
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version_match = re.search(version_regex, cc_version_bytes)
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version = tuple(int(version_match.group(i)) for i in range(1, 4))
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return compiler, version
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def overflow_ubsan_flags(cc, cxx):
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compiler, version = compiler_version(cc, cxx)
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if compiler == 'gcc':
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return ['-fno-sanitize=signed-integer-overflow']
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if compiler == 'clang' and version >= (5, 0, 0):
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return ['-fno-sanitize=pointer-overflow']
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return []
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def build_parser(args):
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description = """
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Cleans the repository and builds a fuzz target (or all).
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Many flags default to environment variables (default says $X='y').
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Options that aren't enabling features default to the correct values for
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zstd.
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Enable sanitizers with --enable-*san.
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For regression testing just build.
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For libFuzzer set LIB_FUZZING_ENGINE and pass --enable-coverage.
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For AFL set CC and CXX to AFL's compilers and set
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LIB_FUZZING_ENGINE='libregression.a'.
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"""
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parser = argparse.ArgumentParser(prog=args.pop(0), description=description)
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parser.add_argument(
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'--lib-fuzzing-engine',
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dest='lib_fuzzing_engine',
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type=str,
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default=LIB_FUZZING_ENGINE,
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help=('The fuzzing engine to use e.g. /path/to/libFuzzer.a '
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"(default: $LIB_FUZZING_ENGINE='{})".format(LIB_FUZZING_ENGINE)))
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parser.add_argument(
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'--enable-coverage',
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dest='coverage',
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action='store_true',
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help='Enable coverage instrumentation (-fsanitize-coverage)')
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parser.add_argument(
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'--enable-asan', dest='asan', action='store_true', help='Enable UBSAN')
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parser.add_argument(
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'--enable-ubsan',
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dest='ubsan',
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action='store_true',
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help='Enable UBSAN')
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parser.add_argument(
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'--enable-ubsan-pointer-overflow',
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dest='ubsan_pointer_overflow',
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action='store_true',
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help='Enable UBSAN pointer overflow check (known failure)')
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parser.add_argument(
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'--enable-msan', dest='msan', action='store_true', help='Enable MSAN')
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parser.add_argument(
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'--enable-msan-track-origins', dest='msan_track_origins',
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action='store_true', help='Enable MSAN origin tracking')
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parser.add_argument(
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'--msan-extra-cppflags',
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dest='msan_extra_cppflags',
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type=str,
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default=MSAN_EXTRA_CPPFLAGS,
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help="Extra CPPFLAGS for MSAN (default: $MSAN_EXTRA_CPPFLAGS='{}')".
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format(MSAN_EXTRA_CPPFLAGS))
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parser.add_argument(
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'--msan-extra-cflags',
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dest='msan_extra_cflags',
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type=str,
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default=MSAN_EXTRA_CFLAGS,
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help="Extra CFLAGS for MSAN (default: $MSAN_EXTRA_CFLAGS='{}')".format(
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MSAN_EXTRA_CFLAGS))
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parser.add_argument(
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'--msan-extra-cxxflags',
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dest='msan_extra_cxxflags',
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type=str,
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default=MSAN_EXTRA_CXXFLAGS,
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help="Extra CXXFLAGS for MSAN (default: $MSAN_EXTRA_CXXFLAGS='{}')".
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format(MSAN_EXTRA_CXXFLAGS))
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parser.add_argument(
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'--msan-extra-ldflags',
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dest='msan_extra_ldflags',
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type=str,
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default=MSAN_EXTRA_LDFLAGS,
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help="Extra LDFLAGS for MSAN (default: $MSAN_EXTRA_LDFLAGS='{}')".
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format(MSAN_EXTRA_LDFLAGS))
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parser.add_argument(
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'--enable-sanitize-recover',
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dest='sanitize_recover',
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action='store_true',
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help='Non-fatal sanitizer errors where possible')
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parser.add_argument(
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'--debug',
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dest='debug',
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type=int,
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default=1,
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help='Set ZSTD_DEBUG (default: 1)')
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parser.add_argument(
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'--force-memory-access',
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dest='memory_access',
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type=int,
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default=0,
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help='Set MEM_FORCE_MEMORY_ACCESS (default: 0)')
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parser.add_argument(
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'--fuzz-rng-seed-size',
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dest='fuzz_rng_seed_size',
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type=int,
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default=4,
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help='Set FUZZ_RNG_SEED_SIZE (default: 4)')
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parser.add_argument(
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'--disable-fuzzing-mode',
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dest='fuzzing_mode',
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action='store_false',
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help='Do not define FUZZING_BUILD_MORE_UNSAFE_FOR_PRODUCTION')
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parser.add_argument(
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'--enable-stateful-fuzzing',
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dest='stateful_fuzzing',
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action='store_true',
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help='Reuse contexts between runs (makes reproduction impossible)')
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parser.add_argument(
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'--cc',
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dest='cc',
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type=str,
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default=CC,
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help="CC (default: $CC='{}')".format(CC))
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parser.add_argument(
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'--cxx',
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dest='cxx',
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type=str,
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default=CXX,
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help="CXX (default: $CXX='{}')".format(CXX))
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parser.add_argument(
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'--cppflags',
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dest='cppflags',
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type=str,
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default=CPPFLAGS,
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help="CPPFLAGS (default: $CPPFLAGS='{}')".format(CPPFLAGS))
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parser.add_argument(
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'--cflags',
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dest='cflags',
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type=str,
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default=CFLAGS,
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help="CFLAGS (default: $CFLAGS='{}')".format(CFLAGS))
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parser.add_argument(
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'--cxxflags',
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dest='cxxflags',
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type=str,
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default=CXXFLAGS,
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help="CXXFLAGS (default: $CXXFLAGS='{}')".format(CXXFLAGS))
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parser.add_argument(
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'--ldflags',
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dest='ldflags',
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type=str,
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default=LDFLAGS,
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help="LDFLAGS (default: $LDFLAGS='{}')".format(LDFLAGS))
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parser.add_argument(
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'--mflags',
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dest='mflags',
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type=str,
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default=MFLAGS,
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help="Extra Make flags (default: $MFLAGS='{}')".format(MFLAGS))
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parser.add_argument(
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'TARGET',
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nargs='*',
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type=str,
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help='Fuzz target(s) to build {{{}}}'.format(', '.join(ALL_TARGETS))
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)
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args = parser.parse_args(args)
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args = parse_env_flags(args, ' '.join(
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[args.cppflags, args.cflags, args.cxxflags, args.ldflags]))
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# Check option sanitiy
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if args.msan and (args.asan or args.ubsan):
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raise RuntimeError('MSAN may not be used with any other sanitizers')
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if args.msan_track_origins and not args.msan:
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raise RuntimeError('--enable-msan-track-origins requires MSAN')
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if args.ubsan_pointer_overflow and not args.ubsan:
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raise RuntimeError('--enable-ubsan-pointer-overlow requires UBSAN')
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if args.sanitize_recover and not args.sanitize:
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raise RuntimeError('--enable-sanitize-recover but no sanitizers used')
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return args
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def build(args):
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try:
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args = build_parser(args)
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except Exception as e:
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print(e)
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return 1
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# The compilation flags we are setting
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targets = args.TARGET
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cc = args.cc
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cxx = args.cxx
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cppflags = [args.cppflags]
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cflags = [args.cflags]
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ldflags = [args.ldflags]
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cxxflags = [args.cxxflags]
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mflags = [args.mflags] if args.mflags else []
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# Flags to be added to both cflags and cxxflags
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common_flags = []
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cppflags += [
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'-DZSTD_DEBUG={}'.format(args.debug),
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'-DMEM_FORCE_MEMORY_ACCESS={}'.format(args.memory_access),
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'-DFUZZ_RNG_SEED_SIZE={}'.format(args.fuzz_rng_seed_size),
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]
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mflags += ['LIB_FUZZING_ENGINE={}'.format(args.lib_fuzzing_engine)]
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# Set flags for options
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if args.coverage:
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common_flags += [
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'-fsanitize-coverage=trace-pc-guard,indirect-calls,trace-cmp'
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]
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if args.sanitize_recover:
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recover_flags = ['-fsanitize-recover=all']
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else:
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recover_flags = ['-fno-sanitize-recover=all']
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if args.sanitize:
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common_flags += recover_flags
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if args.msan:
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msan_flags = ['-fsanitize=memory']
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if args.msan_track_origins:
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msan_flags += ['-fsanitize-memory-track-origins']
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common_flags += msan_flags
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# Append extra MSAN flags (it might require special setup)
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cppflags += [args.msan_extra_cppflags]
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cflags += [args.msan_extra_cflags]
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cxxflags += [args.msan_extra_cxxflags]
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ldflags += [args.msan_extra_ldflags]
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if args.asan:
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common_flags += ['-fsanitize=address']
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if args.ubsan:
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ubsan_flags = ['-fsanitize=undefined']
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if not args.ubsan_pointer_overflow:
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ubsan_flags += overflow_ubsan_flags(cc, cxx)
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common_flags += ubsan_flags
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if args.stateful_fuzzing:
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cppflags += ['-DSTATEFUL_FUZZING']
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if args.fuzzing_mode:
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cppflags += ['-DFUZZING_BUILD_MORE_UNSAFE_FOR_PRODUCTION']
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if args.lib_fuzzing_engine == 'libregression.a':
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targets = ['libregression.a'] + targets
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# Append the common flags
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cflags += common_flags
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cxxflags += common_flags
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# Prepare the flags for Make
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cc_str = "CC={}".format(cc)
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cxx_str = "CXX={}".format(cxx)
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cppflags_str = "CPPFLAGS={}".format(' '.join(cppflags))
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cflags_str = "CFLAGS={}".format(' '.join(cflags))
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cxxflags_str = "CXXFLAGS={}".format(' '.join(cxxflags))
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ldflags_str = "LDFLAGS={}".format(' '.join(ldflags))
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# Print the flags
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print('MFLAGS={}'.format(' '.join(mflags)))
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print(cc_str)
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print(cxx_str)
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print(cppflags_str)
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print(cflags_str)
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print(cxxflags_str)
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print(ldflags_str)
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|
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# Clean and build
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clean_cmd = ['make', 'clean'] + mflags
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print(' '.join(clean_cmd))
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subprocess.check_call(clean_cmd)
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build_cmd = [
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'make',
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cc_str,
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cxx_str,
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cppflags_str,
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cflags_str,
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cxxflags_str,
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ldflags_str,
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] + mflags + targets
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print(' '.join(build_cmd))
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subprocess.check_call(build_cmd)
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return 0
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|
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def libfuzzer_parser(args):
|
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description = """
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Runs a libfuzzer binary.
|
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Passes all extra arguments to libfuzzer.
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The fuzzer should have been build with LIB_FUZZING_ENGINE pointing to
|
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libFuzzer.a.
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Generates output in the CORPORA directory, puts crashes in the ARTIFACT
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directory, and takes extra input from the SEED directory.
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To merge AFL's output pass the SEED as AFL's output directory and pass
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'-merge=1'.
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"""
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parser = argparse.ArgumentParser(prog=args.pop(0), description=description)
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parser.add_argument(
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'--corpora',
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type=str,
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help='Override the default corpora dir (default: {})'.format(
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abs_join(CORPORA_DIR, 'TARGET')))
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parser.add_argument(
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'--artifact',
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type=str,
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help='Override the default artifact dir (default: {})'.format(
|
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abs_join(CORPORA_DIR, 'TARGET-crash')))
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parser.add_argument(
|
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'--seed',
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type=str,
|
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help='Override the default seed dir (default: {})'.format(
|
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abs_join(CORPORA_DIR, 'TARGET-seed')))
|
|
parser.add_argument(
|
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'TARGET',
|
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type=str,
|
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help='Fuzz target(s) to build {{{}}}'.format(', '.join(TARGETS)))
|
|
args, extra = parser.parse_known_args(args)
|
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args.extra = extra
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|
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if args.TARGET and args.TARGET not in TARGETS:
|
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raise RuntimeError('{} is not a valid target'.format(args.TARGET))
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|
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return args
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|
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def libfuzzer(target, corpora=None, artifact=None, seed=None, extra_args=None):
|
|
if corpora is None:
|
|
corpora = abs_join(CORPORA_DIR, target)
|
|
if artifact is None:
|
|
artifact = abs_join(CORPORA_DIR, '{}-crash'.format(target))
|
|
if seed is None:
|
|
seed = abs_join(CORPORA_DIR, '{}-seed'.format(target))
|
|
if extra_args is None:
|
|
extra_args = []
|
|
|
|
target = abs_join(FUZZ_DIR, target)
|
|
|
|
corpora = [create(corpora)]
|
|
artifact = create(artifact)
|
|
seed = check(seed)
|
|
|
|
corpora += [artifact]
|
|
if seed is not None:
|
|
corpora += [seed]
|
|
|
|
cmd = [target, '-artifact_prefix={}/'.format(artifact)]
|
|
cmd += corpora + extra_args
|
|
print(' '.join(cmd))
|
|
subprocess.check_call(cmd)
|
|
|
|
|
|
def libfuzzer_cmd(args):
|
|
try:
|
|
args = libfuzzer_parser(args)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
libfuzzer(args.TARGET, args.corpora, args.artifact, args.seed, args.extra)
|
|
return 0
|
|
|
|
|
|
def afl_parser(args):
|
|
description = """
|
|
Runs an afl-fuzz job.
|
|
Passes all extra arguments to afl-fuzz.
|
|
The fuzzer should have been built with CC/CXX set to the AFL compilers,
|
|
and with LIB_FUZZING_ENGINE='libregression.a'.
|
|
Takes input from CORPORA and writes output to OUTPUT.
|
|
Uses AFL_FUZZ as the binary (set from flag or environment variable).
|
|
"""
|
|
parser = argparse.ArgumentParser(prog=args.pop(0), description=description)
|
|
parser.add_argument(
|
|
'--corpora',
|
|
type=str,
|
|
help='Override the default corpora dir (default: {})'.format(
|
|
abs_join(CORPORA_DIR, 'TARGET')))
|
|
parser.add_argument(
|
|
'--output',
|
|
type=str,
|
|
help='Override the default AFL output dir (default: {})'.format(
|
|
abs_join(CORPORA_DIR, 'TARGET-afl')))
|
|
parser.add_argument(
|
|
'--afl-fuzz',
|
|
type=str,
|
|
default=AFL_FUZZ,
|
|
help='AFL_FUZZ (default: $AFL_FUZZ={})'.format(AFL_FUZZ))
|
|
parser.add_argument(
|
|
'TARGET',
|
|
type=str,
|
|
help='Fuzz target(s) to build {{{}}}'.format(', '.join(TARGETS)))
|
|
args, extra = parser.parse_known_args(args)
|
|
args.extra = extra
|
|
|
|
if args.TARGET and args.TARGET not in TARGETS:
|
|
raise RuntimeError('{} is not a valid target'.format(args.TARGET))
|
|
|
|
if not args.corpora:
|
|
args.corpora = abs_join(CORPORA_DIR, args.TARGET)
|
|
if not args.output:
|
|
args.output = abs_join(CORPORA_DIR, '{}-afl'.format(args.TARGET))
|
|
|
|
return args
|
|
|
|
|
|
def afl(args):
|
|
try:
|
|
args = afl_parser(args)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
target = abs_join(FUZZ_DIR, args.TARGET)
|
|
|
|
corpora = create(args.corpora)
|
|
output = create(args.output)
|
|
|
|
cmd = [args.afl_fuzz, '-i', corpora, '-o', output] + args.extra
|
|
cmd += [target, '@@']
|
|
print(' '.join(cmd))
|
|
subprocess.call(cmd)
|
|
return 0
|
|
|
|
|
|
def regression(args):
|
|
try:
|
|
description = """
|
|
Runs one or more regression tests.
|
|
The fuzzer should have been built with with
|
|
LIB_FUZZING_ENGINE='libregression.a'.
|
|
Takes input from CORPORA.
|
|
"""
|
|
args = targets_parser(args, description)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
for target in args.TARGET:
|
|
corpora = create(abs_join(CORPORA_DIR, target))
|
|
target = abs_join(FUZZ_DIR, target)
|
|
cmd = [target, corpora]
|
|
print(' '.join(cmd))
|
|
subprocess.check_call(cmd)
|
|
return 0
|
|
|
|
|
|
def gen_parser(args):
|
|
description = """
|
|
Generate a seed corpus appropiate for TARGET with data generated with
|
|
decodecorpus.
|
|
The fuzz inputs are prepended with a seed before the zstd data, so the
|
|
output of decodecorpus shouldn't be used directly.
|
|
Generates NUMBER samples prepended with FUZZ_RNG_SEED_SIZE random bytes and
|
|
puts the output in SEED.
|
|
DECODECORPUS is the decodecorpus binary, and must already be built.
|
|
"""
|
|
parser = argparse.ArgumentParser(prog=args.pop(0), description=description)
|
|
parser.add_argument(
|
|
'--number',
|
|
'-n',
|
|
type=int,
|
|
default=100,
|
|
help='Number of samples to generate')
|
|
parser.add_argument(
|
|
'--max-size-log',
|
|
type=int,
|
|
default=13,
|
|
help='Maximum sample size to generate')
|
|
parser.add_argument(
|
|
'--seed',
|
|
type=str,
|
|
help='Override the default seed dir (default: {})'.format(
|
|
abs_join(CORPORA_DIR, 'TARGET-seed')))
|
|
parser.add_argument(
|
|
'--decodecorpus',
|
|
type=str,
|
|
default=DECODECORPUS,
|
|
help="decodecorpus binary (default: $DECODECORPUS='{}')".format(
|
|
DECODECORPUS))
|
|
parser.add_argument(
|
|
'--fuzz-rng-seed-size',
|
|
type=int,
|
|
default=4,
|
|
help="FUZZ_RNG_SEED_SIZE used for generate the samples (must match)"
|
|
)
|
|
parser.add_argument(
|
|
'TARGET',
|
|
type=str,
|
|
help='Fuzz target(s) to build {{{}}}'.format(', '.join(TARGETS)))
|
|
args, extra = parser.parse_known_args(args)
|
|
args.extra = extra
|
|
|
|
if args.TARGET and args.TARGET not in TARGETS:
|
|
raise RuntimeError('{} is not a valid target'.format(args.TARGET))
|
|
|
|
if not args.seed:
|
|
args.seed = abs_join(CORPORA_DIR, '{}-seed'.format(args.TARGET))
|
|
|
|
if not os.path.isfile(args.decodecorpus):
|
|
raise RuntimeError("{} is not a file run 'make -C {} decodecorpus'".
|
|
format(args.decodecorpus, abs_join(FUZZ_DIR, '..')))
|
|
|
|
return args
|
|
|
|
|
|
def gen(args):
|
|
try:
|
|
args = gen_parser(args)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
|
|
seed = create(args.seed)
|
|
with tmpdir() as compressed:
|
|
with tmpdir() as decompressed:
|
|
cmd = [
|
|
args.decodecorpus,
|
|
'-n{}'.format(args.number),
|
|
'-p{}/'.format(compressed),
|
|
'-o{}'.format(decompressed),
|
|
]
|
|
|
|
if 'block_' in args.TARGET:
|
|
cmd += [
|
|
'--gen-blocks',
|
|
'--max-block-size-log={}'.format(args.max_size_log)
|
|
]
|
|
else:
|
|
cmd += ['--max-content-size-log={}'.format(args.max_size_log)]
|
|
|
|
print(' '.join(cmd))
|
|
subprocess.check_call(cmd)
|
|
|
|
if '_round_trip' in args.TARGET:
|
|
print('using decompressed data in {}'.format(decompressed))
|
|
samples = decompressed
|
|
elif '_decompress' in args.TARGET:
|
|
print('using compressed data in {}'.format(compressed))
|
|
samples = compressed
|
|
|
|
# Copy the samples over and prepend the RNG seeds
|
|
for name in os.listdir(samples):
|
|
samplename = abs_join(samples, name)
|
|
outname = abs_join(seed, name)
|
|
rng_seed = os.urandom(args.fuzz_rng_seed_size)
|
|
with open(samplename, 'rb') as sample:
|
|
with open(outname, 'wb') as out:
|
|
out.write(rng_seed)
|
|
CHUNK_SIZE = 131072
|
|
chunk = sample.read(CHUNK_SIZE)
|
|
while len(chunk) > 0:
|
|
out.write(chunk)
|
|
chunk = sample.read(CHUNK_SIZE)
|
|
return 0
|
|
|
|
|
|
def minimize(args):
|
|
try:
|
|
description = """
|
|
Runs a libfuzzer fuzzer with -merge=1 to build a minimal corpus in
|
|
TARGET_seed_corpus. All extra args are passed to libfuzzer.
|
|
"""
|
|
args = targets_parser(args, description)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
|
|
for target in args.TARGET:
|
|
# Merge the corpus + anything else into the seed_corpus
|
|
corpus = abs_join(CORPORA_DIR, target)
|
|
seed_corpus = abs_join(CORPORA_DIR, "{}_seed_corpus".format(target))
|
|
extra_args = [corpus, "-merge=1"] + args.extra
|
|
libfuzzer(target, corpora=seed_corpus, extra_args=extra_args)
|
|
seeds = set(os.listdir(seed_corpus))
|
|
# Copy all crashes directly into the seed_corpus if not already present
|
|
crashes = abs_join(CORPORA_DIR, '{}-crash'.format(target))
|
|
for crash in os.listdir(crashes):
|
|
if crash not in seeds:
|
|
shutil.copy(abs_join(crashes, crash), seed_corpus)
|
|
seeds.add(crash)
|
|
|
|
|
|
def zip_cmd(args):
|
|
try:
|
|
description = """
|
|
Zips up the seed corpus.
|
|
"""
|
|
args = targets_parser(args, description)
|
|
except Exception as e:
|
|
print(e)
|
|
return 1
|
|
|
|
for target in args.TARGET:
|
|
# Zip the seed_corpus
|
|
seed_corpus = abs_join(CORPORA_DIR, "{}_seed_corpus".format(target))
|
|
seeds = [abs_join(seed_corpus, f) for f in os.listdir(seed_corpus)]
|
|
zip_file = "{}.zip".format(seed_corpus)
|
|
cmd = ["zip", "-q", "-j", "-9", zip_file]
|
|
print(' '.join(cmd + [abs_join(seed_corpus, '*')]))
|
|
subprocess.check_call(cmd + seeds)
|
|
|
|
|
|
def list_cmd(args):
|
|
print("\n".join(TARGETS))
|
|
|
|
|
|
def short_help(args):
|
|
name = args[0]
|
|
print("Usage: {} [OPTIONS] COMMAND [ARGS]...\n".format(name))
|
|
|
|
|
|
def help(args):
|
|
short_help(args)
|
|
print("\tfuzzing helpers (select a command and pass -h for help)\n")
|
|
print("Options:")
|
|
print("\t-h, --help\tPrint this message")
|
|
print("")
|
|
print("Commands:")
|
|
print("\tbuild\t\tBuild a fuzzer")
|
|
print("\tlibfuzzer\tRun a libFuzzer fuzzer")
|
|
print("\tafl\t\tRun an AFL fuzzer")
|
|
print("\tregression\tRun a regression test")
|
|
print("\tgen\t\tGenerate a seed corpus for a fuzzer")
|
|
print("\tminimize\tMinimize the test corpora")
|
|
print("\tzip\t\tZip the minimized corpora up")
|
|
print("\tlist\t\tList the available targets")
|
|
|
|
|
|
def main():
|
|
args = sys.argv
|
|
if len(args) < 2:
|
|
help(args)
|
|
return 1
|
|
if args[1] == '-h' or args[1] == '--help' or args[1] == '-H':
|
|
help(args)
|
|
return 1
|
|
command = args.pop(1)
|
|
args[0] = "{} {}".format(args[0], command)
|
|
if command == "build":
|
|
return build(args)
|
|
if command == "libfuzzer":
|
|
return libfuzzer_cmd(args)
|
|
if command == "regression":
|
|
return regression(args)
|
|
if command == "afl":
|
|
return afl(args)
|
|
if command == "gen":
|
|
return gen(args)
|
|
if command == "minimize":
|
|
return minimize(args)
|
|
if command == "zip":
|
|
return zip_cmd(args)
|
|
if command == "list":
|
|
return list_cmd(args)
|
|
short_help(args)
|
|
print("Error: No such command {} (pass -h for help)".format(command))
|
|
return 1
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|