Adds the OLM_PICKLE_EXTRA_DATA error code. We fail with this code when
the pickle object looks right except for some unexpected trailing bytes
which we didn't process.
Like other crypto libs, libolm contains many obstacles which a fuzzer is
unlikely to be able to surmount but which are not important for the end
goal of fuzzing. The easiest and most robust way around this is to remove
these obstacles conditionally when building the fuzzer binaries.
This commit adds a preprocessor macro OLM_FUZZING which can be used to
conditionally disables problematic bits of code during compile-time for
easier fuzzing.
Currently the only thing it disables is the encryption/decryption and
base64 encoding/decoding when processing pickled Megolm keys. This
allows the fuzzers to fuzz the unpickling functionality directly without
inadvertently fuzzing the base64 encoder and encryption (which should be
fuzzed separately).
The macro is set in the Makefile *only* when building fuzzer binaries.
- `compile_commands.json`: clang compilation database
- `.ccls-cache`: Cache directory for the ccls language server
- `.clang-format`: clang formatting description
Hi,
currently tests don't build with MSVC, because the Base64 test tries to initialize multiple arrays with a length value that was derived from a non-const context. I have fixed this by using vectors instead.
Sincerely
Johannes Hayeß
From 2d76972a862f0aa04b5011537bef71a49aa82a03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20Haye=C3=9F?= <jhaye@mailbox.org>
Date: Sun, 27 Jun 2021 17:46:24 +0200
Subject: [PATCH] Fix compiling with MSVC
MIME-Version: 1.0
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Previously attempts to initialize arrays with non-const value. This
seemingly works on GCC/clang due to their static code analysis, but
fails with MSVC. This switches to dynamic memory allocation with
std::vector, to solve the problem.
Signed-off-by: Johannes Hayeß <jhaye@mailbox.org>
This type of instrumentation is much faster (several times over) and
supports much more features than afl-gcc/afl-g++, though it requires
a LLVM/clang installation.
