1 files changed, 58 insertions, 0 deletions
diff --git a/test/core/slice/percent_encode_fuzzer.cc b/test/core/slice/percent_encode_fuzzer.cc
new file mode 100644
index 0000000000..c8e3849fc8
--- /dev/null
+++ b/test/core/slice/percent_encode_fuzzer.cc
@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/slice/percent_encoding.h"
+#include "test/core/util/memory_counters.h"
+
+bool squelch = true;
+bool leak_check = true;
+
+static void test(const uint8_t* data, size_t size, const uint8_t* dict) {
+  struct grpc_memory_counters counters;
+  grpc_memory_counters_init();
+  grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);
+  grpc_slice output = grpc_percent_encode_slice(input, dict);
+  grpc_slice decoded_output;
+  // encoder must always produce decodable output
+  GPR_ASSERT(grpc_strict_percent_decode_slice(output, dict, &decoded_output));
+  grpc_slice permissive_decoded_output =
+      grpc_permissive_percent_decode_slice(output);
+  // and decoded output must always match the input
+  GPR_ASSERT(grpc_slice_eq(input, decoded_output));
+  GPR_ASSERT(grpc_slice_eq(input, permissive_decoded_output));
+  grpc_slice_unref(input);
+  grpc_slice_unref(output);
+  grpc_slice_unref(decoded_output);
+  grpc_slice_unref(permissive_decoded_output);
+  counters = grpc_memory_counters_snapshot();
+  grpc_memory_counters_destroy();
+  GPR_ASSERT(counters.total_size_relative == 0);
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  test(data, size, grpc_url_percent_encoding_unreserved_bytes);
+  test(data, size, grpc_compatible_percent_encoding_unreserved_bytes);
+  return 0;
+}