wv_factory_extraction_tool: extract provision 4.0 csr

Bug: 231677822
Test: adb shell wv_factory_extraction_tool csr
Change-Id: I9f21514b027261f1d69c24a4d2f54051ccaac9a5

libwvdrmengine/tools/factory_upload_tool/include/WidevineOemcryptoInterface.h

@@ -0,0 +1,52 @@
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+
+#ifndef WIDEVINE_OEMCRYPTO_INTERFACE_H_
+#define WIDEVINE_OEMCRYPTO_INTERFACE_H_
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "OEMCryptoCENC.h"
+
+namespace widevine {
+
+class OEMCryptoInterface {
+ public:
+  OEMCryptoInterface() = default;
+  OEMCryptoInterface(const OEMCryptoInterface&) = delete;
+  OEMCryptoInterface& operator=(const OEMCryptoInterface&) = delete;
+  virtual ~OEMCryptoInterface();
+
+  // Initializes this interface by providing path to the OEMCrypto library.
+  bool Init(const std::string& oemcrypto_path);
+
+  // Retrieves the boot certificate chain from OEMCrypto implementation.
+  OEMCryptoResult GetBcc(std::vector<uint8_t>& bcc);
+
+  // Retrieves the build information of the OEMCrypto library from OEMCrypto
+  // implementation.
+  OEMCryptoResult GetOEMCryptoBuildInfo(std::string& build_info);
+
+ private:
+  typedef OEMCryptoResult (*Initialize_t)();
+  typedef OEMCryptoResult (*Terminate_t)();
+  typedef OEMCryptoResult (*GetBootCertificateChain_t)(
+      uint8_t* bcc, size_t* bcc_size, uint8_t* additional_signature,
+      size_t* additional_signature_size);
+  typedef OEMCryptoResult (*BuildInformation_t)(char* buffer,
+                                                size_t* buffer_length);
+
+  Initialize_t Initialize = nullptr;
+  Terminate_t Terminate = nullptr;
+  GetBootCertificateChain_t GetBootCertificateChain = nullptr;
+  BuildInformation_t BuildInformation = nullptr;
+
+  void* handle_ = nullptr;
+};
+
+}  // namespace widevine
+
+#endif  // WIDEVINE_OEMCRYPTO_INTERFACE_H_