Add OEMCrypto_GetRandom fuzzer

Merged from https://widevine-internal-review.googlesource.com/174771
Merged from https://widevine-internal-review.googlesource.com/174854

Change-Id: Ia654123bcbe8fa2e7daadaab79c1149ff3cde6b0

libwvdrmengine/oemcrypto/test/fuzz_tests/oemcrypto_get_random_fuzz.cc

@@ -0,0 +1,24 @@
+// Copyright 2023 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine
+// License Agreement.
+
+#include <vector>
+
+#include "FuzzedDataProvider.h"
+#include "OEMCryptoCENC.h"
+#include "oemcrypto_fuzz_helper.h"
+
+extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
+  wvoec::RedirectStdoutToFile();
+  wvoec::SessionUtil session_util;
+  wvoec::InitializeFuzz(session_util);
+  return 0;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  std::vector<uint8_t> random_data(
+      FuzzedDataProvider(data, size)
+          .ConsumeIntegralInRange<size_t>(0, wvoec::MAX_FUZZ_OUTPUT_LENGTH));
+  OEMCrypto_GetRandom(random_data.data(), random_data.size());
+  return 0;
+}