Source release 17.1.0

oemcrypto/test/fuzz_tests/oemcrypto_generic_sign_fuzz.cc

@@ -0,0 +1,55 @@
+// Copyright 2020 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine
+// License Agreement.
+
+#include "OEMCryptoCENC.h"
+#include "log.h"
+#include "oemcrypto_fuzz_helper.h"
+#include "oemcrypto_fuzz_structs.h"
+#include "oemcrypto_types.h"
+
+namespace wvoec {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  // Redirect printf and log statements from oemcrypto functions to a file to
+  // reduce noise
+  RedirectStdoutToFile();
+
+  OEMCrypto_Generic_Api_Fuzz fuzzed_structure;
+  if (size < sizeof(fuzzed_structure)) {
+    return 0;
+  }
+  // Copy OEMCrypto_Generic_Api_Fuzz from input data.
+  memcpy(&fuzzed_structure, data, sizeof(fuzzed_structure));
+  ConvertDataToValidEnum(OEMCrypto_CipherMode_MaxValue,
+                         &fuzzed_structure.cipher_mode);
+  ConvertDataToValidEnum(OEMCrypto_Algorithm_MaxValue,
+                         &fuzzed_structure.algorithm);
+
+  size_t clear_buffer_size = size - sizeof(fuzzed_structure);
+  if (clear_buffer_size == 0) {
+    return 0;
+  }
+  // Copy clear buffer from input data.
+  vector<uint8_t> clear_buffer(clear_buffer_size);
+  memcpy(clear_buffer.data(), data + sizeof(fuzzed_structure),
+         clear_buffer_size);
+
+  OEMCryptoLicenseAPIFuzz license_api_fuzz;
+  Session* session = license_api_fuzz.session();
+  // Load license and call generic_sign API.
+  license_api_fuzz.LoadLicense();
+  OEMCryptoResult sts = OEMCrypto_SelectKey(
+      session->session_id(), session->license().keys[0].key_id,
+      session->license().keys[0].key_id_length, fuzzed_structure.cipher_mode);
+  CheckStatusAndExitFuzzerOnFailure(sts, OEMCrypto_SUCCESS);
+  size_t signature_length = 0;
+  OEMCrypto_Generic_Sign(session->session_id(), clear_buffer.data(),
+                         clear_buffer.size(), fuzzed_structure.algorithm,
+                         nullptr, &signature_length);
+  vector<uint8_t> signature(signature_length);
+  OEMCrypto_Generic_Sign(session->session_id(), clear_buffer.data(),
+                         clear_buffer.size(), fuzzed_structure.algorithm,
+                         signature.data(), &signature_length);
+  return 0;
+}
+}  // namespace wvoec