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https://gitlab.torproject.org/tpo/core/tor.git
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845e8dbe59
encoding and decoding. There are bunches of places where we don't want to invest in a full fuzzer, but we would like to make sure that some string operation can handle all its possible inputs. This fuzzer uses the first byte of its input to decide what to do with the rest of the input. Right now, all the possibilities are decoding a string, and seeing whether it is decodeable. If it is, we try to re-encode it and do the whole thing again, to make sure we get the same result. This turned up a lot of bugs in the key-value parser, and I think it will help in other cases too. Closes ticket 28808.
155 lines
3.7 KiB
Python
Executable file
155 lines
3.7 KiB
Python
Executable file
#!/usr/bin/python
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FUZZERS = """
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consensus
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descriptor
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diff
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diff-apply
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extrainfo
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hsdescv2
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hsdescv3
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http
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http-connect
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iptsv2
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microdesc
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socks
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strops
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vrs
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"""
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PREAMBLE = r"""
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FUZZING_CPPFLAGS = \
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$(src_test_AM_CPPFLAGS) $(TEST_CPPFLAGS)
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FUZZING_CFLAGS = \
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$(AM_CFLAGS) $(TEST_CFLAGS)
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FUZZING_LDFLAG = \
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@TOR_LDFLAGS_zlib@ @TOR_LDFLAGS_openssl@ @TOR_LDFLAGS_libevent@
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FUZZING_LIBS = \
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$(TOR_INTERNAL_TESTING_LIBS) \
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$(rust_ldadd) \
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@TOR_ZLIB_LIBS@ @TOR_LIB_MATH@ \
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@TOR_LIBEVENT_LIBS@ @TOR_OPENSSL_LIBS@ \
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@TOR_LIB_WS32@ @TOR_LIB_IPHLPAPI@ @TOR_LIB_GDI@ @TOR_LIB_USERENV@ @CURVE25519_LIBS@ \
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@TOR_SYSTEMD_LIBS@ \
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@TOR_LZMA_LIBS@ \
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@TOR_ZSTD_LIBS@
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oss-fuzz-prereqs: \
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$(TOR_INTERNAL_TESTING_LIBS)
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noinst_HEADERS += \
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src/test/fuzz/fuzzing.h
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LIBFUZZER = -lFuzzer
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LIBFUZZER_CPPFLAGS = $(FUZZING_CPPFLAGS) -DLLVM_FUZZ
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LIBFUZZER_CFLAGS = $(FUZZING_CFLAGS)
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LIBFUZZER_LDFLAG = $(FUZZING_LDFLAG)
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LIBFUZZER_LIBS = $(FUZZING_LIBS) $(LIBFUZZER) -lstdc++
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LIBOSS_FUZZ_CPPFLAGS = $(FUZZING_CPPFLAGS) -DLLVM_FUZZ
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LIBOSS_FUZZ_CFLAGS = $(FUZZING_CFLAGS)
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"""
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POSTAMBLE = r"""
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noinst_PROGRAMS += $(FUZZERS) $(LIBFUZZER_FUZZERS)
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noinst_LIBRARIES += $(OSS_FUZZ_FUZZERS)
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oss-fuzz-fuzzers: oss-fuzz-prereqs $(OSS_FUZZ_FUZZERS)
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fuzzers: $(FUZZERS) $(LIBFUZZER_FUZZERS)
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test-fuzz-corpora: $(FUZZERS)
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$(top_srcdir)/src/test/fuzz_static_testcases.sh
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"""
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########### No user serviceable parts will follow.
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PREAMBLE = PREAMBLE.strip()
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POSTAMBLE = POSTAMBLE.strip() # If I use it, it's a word!
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FUZZERS = FUZZERS.split()
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FUZZERS.sort()
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WARNING = """
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# This file was generated by fuzzing_include_am.py; do not hand-edit unless
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# you enjoy having your changes erased.
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""".strip()
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print(WARNING)
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print(PREAMBLE)
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print("\n# ===== AFL fuzzers")
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def get_id_name(s):
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return s.replace("-", "_")
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for fuzzer in FUZZERS:
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idname = get_id_name(fuzzer)
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print("""\
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if UNITTESTS_ENABLED
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src_test_fuzz_fuzz_{name}_SOURCES = \\
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src/test/fuzz/fuzzing_common.c \\
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src/test/fuzz/fuzz_{name}.c
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src_test_fuzz_fuzz_{name}_CPPFLAGS = $(FUZZING_CPPFLAGS)
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src_test_fuzz_fuzz_{name}_CFLAGS = $(FUZZING_CFLAGS)
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src_test_fuzz_fuzz_{name}_LDFLAGS = $(FUZZING_LDFLAG)
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src_test_fuzz_fuzz_{name}_LDADD = $(FUZZING_LIBS)
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endif
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""".format(name=idname))
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print("if UNITTESTS_ENABLED")
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print("FUZZERS = \\")
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print(" \\\n".join("\tsrc/test/fuzz/fuzz-{name}".format(name=fuzzer)
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for fuzzer in FUZZERS))
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print("endif")
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print("\n# ===== libfuzzer")
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print("\nif LIBFUZZER_ENABLED")
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for fuzzer in FUZZERS:
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idname = get_id_name(fuzzer)
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print("""\
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if UNITTESTS_ENABLED
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src_test_fuzz_lf_fuzz_{name}_SOURCES = \\
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$(src_test_fuzz_fuzz_{name}_SOURCES)
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src_test_fuzz_lf_fuzz_{name}_CPPFLAGS = $(LIBFUZZER_CPPFLAGS)
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src_test_fuzz_lf_fuzz_{name}_CFLAGS = $(LIBFUZZER_CFLAGS)
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src_test_fuzz_lf_fuzz_{name}_LDFLAGS = $(LIBFUZZER_LDFLAG)
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src_test_fuzz_lf_fuzz_{name}_LDADD = $(LIBFUZZER_LIBS)
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endif
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""".format(name=idname))
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print("LIBFUZZER_FUZZERS = \\")
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print(" \\\n".join("\tsrc/test/fuzz/lf-fuzz-{name}".format(name=fuzzer)
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for fuzzer in FUZZERS))
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print("""
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else
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LIBFUZZER_FUZZERS =
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endif""")
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print("\n# ===== oss-fuzz\n")
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print("if OSS_FUZZ_ENABLED")
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for fuzzer in FUZZERS:
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idname = get_id_name(fuzzer)
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print("""\
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if UNITTESTS_ENABLED
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src_test_fuzz_liboss_fuzz_{name}_a_SOURCES = \\
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$(src_test_fuzz_fuzz_{name}_SOURCES)
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src_test_fuzz_liboss_fuzz_{name}_a_CPPFLAGS = $(LIBOSS_FUZZ_CPPFLAGS)
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src_test_fuzz_liboss_fuzz_{name}_a_CFLAGS = $(LIBOSS_FUZZ_CFLAGS)
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endif
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""".format(name=idname))
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print("OSS_FUZZ_FUZZERS = \\")
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print(" \\\n".join("\tsrc/test/fuzz/liboss-fuzz-{name}.a".format(name=fuzzer)
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for fuzzer in FUZZERS))
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print("""
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else
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OSS_FUZZ_FUZZERS =
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endif""")
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print("")
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print(POSTAMBLE)
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