fuzz test: Allow aws signing filter to run. (envoyproxy#21163)

* fuzz test: Allow aws signing filter to run. Provide decoding_buffer_ to aws signing filter, allowing it to run further. Signed-off-by: Andre Vehreschild <vehre@x41-dsec.de>
LeonGao91 · May 5, 2022 · 697db5f · 697db5f
1 parent e6dc83b
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diff --git a/...ommon/fuzz/filter_corpus/clusterfuzz-testcase-minimized-filter_fuzz_test-4845350742523904 b/...ommon/fuzz/filter_corpus/clusterfuzz-testcase-minimized-filter_fuzz_test-4845350742523904
diff --git a/test/extensions/filters/http/common/fuzz/uber_filter.h b/test/extensions/filters/http/common/fuzz/uber_filter.h
@@ -57,6 +57,8 @@ class UberFilterFuzzer : public HttpFilterFuzzer {
   // Mocked callbacks.
   NiceMock<Http::MockStreamDecoderFilterCallbacks> decoder_callbacks_;
   NiceMock<Http::MockStreamEncoderFilterCallbacks> encoder_callbacks_;
+
+  const Buffer::Instance* decoding_buffer_{};
 };
 
 } // namespace HttpFilters

diff --git a/test/extensions/filters/http/common/fuzz/uber_per_filter.cc b/test/extensions/filters/http/common/fuzz/uber_per_filter.cc
@@ -138,6 +138,13 @@ void UberFilterFuzzer::perFilterSetup() {
       .WillByDefault(testing::ReturnRef(listener_metadata_));
   ON_CALL(factory_context_.api_, customStatNamespaces())
       .WillByDefault(testing::ReturnRef(custom_stat_namespaces_));
+
+  // Prepare expectations for AWSRequestSigning filter
+  ON_CALL(decoder_callbacks_, addDecodedData(_, _))
+      .WillByDefault([this](Buffer::Instance& data, bool) { decoding_buffer_ = &data; });
+  ON_CALL(decoder_callbacks_, decodingBuffer()).WillByDefault([this]() -> const Buffer::Instance* {
+    return decoding_buffer_;
+  });
 }
 
 } // namespace HttpFilters