Fuzz account, hex, dec and endpoint parsing (#2523)

nano/fuzzer_test/CMakeLists.txt

@@ -1,3 +1,11 @@
 add_executable(fuzz_buffer fuzz_buffer.cpp)
 target_compile_options(fuzz_buffer PUBLIC -fsanitize=fuzzer)
 target_link_libraries(fuzz_buffer PRIVATE -fsanitize=fuzzer node)
+
+add_executable(fuzz_bignum fuzz_bignum.cpp)
+target_compile_options(fuzz_bignum PUBLIC -fsanitize=fuzzer)
+target_link_libraries(fuzz_bignum PRIVATE -fsanitize=fuzzer node)
+
+add_executable(fuzz_endpoint_parsing fuzz_endpoint_parsing.cpp)
+target_compile_options(fuzz_endpoint_parsing PUBLIC -fsanitize=fuzzer)
+target_link_libraries(fuzz_endpoint_parsing PRIVATE -fsanitize=fuzzer node)

nano/fuzzer_test/fuzz_bignum.cpp

@@ -0,0 +1,36 @@
+#include <nano/node/common.hpp>
+
+/** Fuzz decimal, hex and account parsing */
+void fuzz_bignum_parsers (const uint8_t * Data, size_t Size)
+{
+	try
+	{
+		auto data (std::string (reinterpret_cast<char *> (const_cast<uint8_t *> (Data)), Size));
+		nano::uint128_union u128;
+		u128.decode_dec (data);
+		u128.decode_hex (data);
+
+		nano::uint256_union u256;
+		u256.decode_dec (data);
+		u256.decode_hex (data);
+
+		nano::uint512_union u512;
+		u512.decode_hex (data);
+
+		nano::public_key pkey;
+		pkey.decode_account (data);
+
+		uint64_t out;
+		nano::from_string_hex (data, out);
+	}
+	catch (std::out_of_range const &)
+	{
+	}
+}
+
+/** Fuzzer entry point */
+extern "C" int LLVMFuzzerTestOneInput (const uint8_t * Data, size_t Size)
+{
+	fuzz_bignum_parsers (Data, Size);
+	return 0;
+}

nano/fuzzer_test/fuzz_endpoint_parsing.cpp

@@ -0,0 +1,18 @@
+#include <nano/node/common.hpp>
+
+/** Fuzz endpoint parsing */
+void fuzz_endpoint_parsing (const uint8_t * Data, size_t Size)
+{
+	auto data (std::string (reinterpret_cast<char *> (const_cast<uint8_t *> (Data)), Size));
+	nano::endpoint endpoint;
+	nano::parse_endpoint (data, endpoint);
+	nano::tcp_endpoint tcp_endpoint;
+	nano::parse_tcp_endpoint (data, tcp_endpoint);
+}
+
+/** Fuzzer entry point */
+extern "C" int LLVMFuzzerTestOneInput (const uint8_t * Data, size_t Size)
+{
+	fuzz_endpoint_parsing (Data, Size);
+	return 0;
+}