tests: Add Parse(...) (descriptor) fuzzing harness

Author: practicalswift

src/Makefile.test.include

@@ -16,6 +16,7 @@ FUZZ_TARGETS = \
   test/fuzz/blockundo_deserialize \
   test/fuzz/bloomfilter_deserialize \
   test/fuzz/coins_deserialize \
+  test/fuzz/descriptor_parse \
   test/fuzz/diskblockindex_deserialize \
   test/fuzz/eval_script \
   test/fuzz/inv_deserialize \
@@ -253,6 +254,12 @@ test_fuzz_coins_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 test_fuzz_coins_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 test_fuzz_coins_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
 
+test_fuzz_descriptor_parse_SOURCES = $(FUZZ_SUITE) test/fuzz/descriptor_parse.cpp
+test_fuzz_descriptor_parse_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
+test_fuzz_descriptor_parse_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
+test_fuzz_descriptor_parse_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
+test_fuzz_descriptor_parse_LDADD = $(FUZZ_SUITE_LD_COMMON)
+
 test_fuzz_netaddr_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
 test_fuzz_netaddr_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DNETADDR_DESERIALIZE=1
 test_fuzz_netaddr_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)

src/test/fuzz/descriptor_parse.cpp

@@ -0,0 +1,22 @@
+// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <chainparams.h>
+#include <script/descriptor.h>
+#include <test/fuzz/fuzz.h>
+
+void initialize()
+{
+    SelectParams(CBaseChainParams::REGTEST);
+}
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+    const std::string descriptor(buffer.begin(), buffer.end());
+    FlatSigningProvider signing_provider;
+    std::string error;
+    for (const bool require_checksum : {true, false}) {
+        Parse(descriptor, signing_provider, error, require_checksum);
+    }
+}