Refactor oemcrypto mock into stand alone reference code

Merge from Widevine repo of http://go/wvgerrit/46204
Refactor utility code - split the mock, step 1

Merge from Widevine repo of http://go/wvgerrit/46205
Move some OEMCrypto types to common header - split the mock, step 2

Merge from Widevine repo of http://go/wvgerrit/46206
Split mock into two -- step 3

Merge from Widevine repo of http://go/wvgerrit/47460
Split the mock into two -- step 3.5

The CL moves several files used by oemcrypto and cdm into a common
subdirectory, so that it may more easily be shared with partners.

The CORE_DISALLOW_COPY_AND_ASSIGN macro was moved to its own header in
the util/include directory.

This CL removes some references to the mock from other code, and puts
some constants and types, such as the definition of the keybox, into a
header in oemcrypto.

Test: tested as part of http://go/ag/4674759
bug: 76393338
Change-Id: I75b4bde7062ed8ee572c97ebc2f4da018f4be0c9

libwvdrmengine/oemcrypto/ref/src/oemcrypto_keybox_ref.h

@@ -0,0 +1,53 @@
+// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine Master
+// License Agreement.
+//
+//  Ref implementation of OEMCrypto APIs
+//
+#ifndef OEMCRYPTO_KEYBOX_REF_H_
+#define OEMCRYPTO_KEYBOX_REF_H_
+
+#include "oemcrypto_key_ref.h"
+
+namespace wvoec_ref {
+
+const int DEVICE_KEY_LENGTH = 16;
+typedef uint8_t WvKeyboxKey[DEVICE_KEY_LENGTH];
+
+const int KEY_DATA_LENGTH = 72;
+typedef uint8_t WvKeyboxKeyData[KEY_DATA_LENGTH];
+
+enum KeyboxError { NO_ERROR, BAD_CRC, BAD_MAGIC, OTHER_ERROR };
+
+// Widevine keybox
+class WvKeybox {
+ public:
+  WvKeybox();
+  ~WvKeybox() {}
+
+  KeyboxError Validate();
+  const std::vector<uint8_t>& device_id() { return device_id_; }
+  std::vector<uint8_t>& device_key() { return device_key_; }
+  const WvKeyboxKeyData& key_data() { return key_data_; }
+  size_t key_data_length() { return KEY_DATA_LENGTH; }
+  bool InstallKeybox(const uint8_t* keybox, size_t keyBoxLength);
+
+ private:
+  bool Prepare();
+
+  bool valid_;
+  std::vector<uint8_t> device_id_;
+  std::vector<uint8_t> device_key_;
+  WvKeyboxKeyData key_data_;
+  uint8_t magic_[4];
+  uint8_t crc_[4];
+};
+
+class WvTestKeybox : public WvKeybox {
+ public:
+  WvTestKeybox();
+};
+
+}  // namespace wvoec_ref
+
+#endif  // OEMCRYPTO_KEYBOX_REF_H_