fuzz_tests: add a test for utf8canonical

contrib/fuzz_testing/fuzz.sh

@@ -14,8 +14,8 @@ then
   exit 1
 fi
 case "$type" in
-  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof) ;;
+  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|utf8) ;;
-  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof"; exit 1 ;;
+  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|utf8"; exit 1 ;;
 esac
 
 if test -d "fuzz-out/$type"

tests/fuzz/CMakeLists.txt

@@ -218,3 +218,13 @@ set_property(TARGET tx-extra_fuzz_tests
   PROPERTY
     FOLDER "tests")
 
+monero_add_minimal_executable(utf8_fuzz_tests utf8.cpp fuzzer.cpp)
+target_link_libraries(utf8_fuzz_tests
+  PRIVATE
+    common
+    epee
+    ${Boost_THREAD_LIBRARY}
+    ${Boost_CHRONO_LIBRARY}
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES}
+    $ENV{LIB_FUZZING_ENGINE})

tests/fuzz/utf8.cpp

@@ -0,0 +1,39 @@
+// Copyright (c) 2017-2020, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "include_base_utils.h"
+#include "file_io_utils.h"
+#include "common/utf8.h"
+#include "fuzzer.h"
+
+BEGIN_INIT_SIMPLE_FUZZER()
+END_INIT_SIMPLE_FUZZER()
+
+BEGIN_SIMPLE_FUZZER()
+  tools::utf8canonical(std::string((const char*)buf, len), [](wint_t c)->wint_t { return c; });
+END_SIMPLE_FUZZER()