tests: add Bulletproof+ fuzz test

contrib/fuzz_testing/fuzz.sh

@@ -10,12 +10,12 @@ fi
 type="$1"
 if test -z "$type"
 then
-  echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"
+  echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"
   exit 1
 fi
 case "$type" in
-  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|utf8|clsag|clsag_cout|clsag_message|clsag_pubs) ;;
-  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"; exit 1 ;;
+  block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs) ;;
+  *) echo "usage: $0 block|transaction|signature|cold-outputs|cold-transaction|load-from-binary|load-from-json|base58|parse-url|http-client|levin|bulletproof|bulletproof-plus|utf8|clsag|clsag_cout|clsag_message|clsag_pubs"; exit 1 ;;
 esac
 
 if test -d "fuzz-out/$type"

tests/fuzz/CMakeLists.txt

@@ -268,6 +268,18 @@ set_property(TARGET bulletproof_fuzz_tests
   PROPERTY
     FOLDER "tests")
 
+monero_add_minimal_executable(bulletproof-plus_fuzz_tests bulletproof-plus.cpp fuzzer.cpp)
+target_link_libraries(bulletproof-plus_fuzz_tests
+  PRIVATE
+    ringct
+    serialization
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES}
+    $ENV{LIB_FUZZING_ENGINE})
+set_property(TARGET bulletproof-plus_fuzz_tests
+  PROPERTY
+    FOLDER "tests")
+
 monero_add_minimal_executable(tx-extra_fuzz_tests tx-extra.cpp fuzzer.cpp)
 target_link_libraries(tx-extra_fuzz_tests
   PRIVATE

tests/fuzz/bulletproof-plus.cpp

@@ -0,0 +1,65 @@
+// Copyright (c) 2026, 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 "fuzzer.h"
+#include "ringct/bulletproofs_plus.h"
+#include "serialization/binary_utils.h"
+
+#include <string>
+#include <utility>
+
+namespace
+{
+  struct fuzz_input
+  {
+    rct::keyV commitments;
+    rct::BulletproofPlus proof;
+
+    BEGIN_SERIALIZE_OBJECT()
+      FIELD(commitments)
+      FIELD(proof)
+    END_SERIALIZE()
+  };
+}
+
+BEGIN_INIT_SIMPLE_FUZZER()
+END_INIT_SIMPLE_FUZZER()
+
+BEGIN_SIMPLE_FUZZER()
+  if (len > 4096)
+    return 0;
+
+  fuzz_input input;
+  const std::string blob{reinterpret_cast<const char*>(buf), len};
+  if (!serialization::parse_binary(blob, input))
+    return 0;
+
+  input.proof.V = std::move(input.commitments);
+  rct::bulletproof_plus_VERIFY(input.proof);
+END_SIMPLE_FUZZER()