Files
boringssl/fuzz/server_no_fuzzer_mode.cc
David Benjamin 56383dabf4 Simplfy fuzzer build
Instead of having a pair of bespoke build definitions use the standard
FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION toggle. We actually originated
the idea of a fuzzing-specific build toggle, and then libFuzzer
standardized a toggle when we talked to them about what we were doing.

The problem is our fuzzer mode toggle substantially changed the TLS
stack behavior, such that downstream code would likely go haywire. So we
couldn't easily fold into the standard one, and all of BoringSSL's
downstream fuzzer builds were messy.

Instead, make a few changes:

1. Switch BORINGSSL_UNSAFE_DETERMINISTIC_MODE to
   FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION. That flag is not expected
   to cause downstream issues as it just makes the PRNG deterministic.

2. Replace BORINGSSL_UNSAFE_FUZZER_MODE with a runtime toggle that is
   only available when building with
   FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION.

3. Instead of the no_fuzzer_mode fuzzers being special corpora for the
   client and server fuzzers, they're now just separate fuzzerrs and
   follow the usual naming conventions between fuzzers and their
   corpora.

Update-Note: Downstream fuzzer builds can now be simplified. If the
fuzzing infrastructure already builds with
FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION, the separate boringssl_fuzz
(or whatever) target can be removed.

Bug: 42290128
Change-Id: Ia1e479777f366908951e15067c96c9767c229f0a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/77749
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Bob Beck <bbe@google.com>
2025-03-20 03:41:54 -07:00

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// Copyright 2016 The BoringSSL Authors
//
// 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
//
// https://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.
#include "../ssl/test/fuzzer.h"
static TLSFuzzer g_fuzzer(TLSFuzzer::kTLS, TLSFuzzer::kServer,
TLSFuzzer::kFuzzerModeOff);
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len) {
return g_fuzzer.TestOneInput(buf, len);
}