Support CAST V2 authentication

bug: 12702350

Squashed commit of these CLs from the widevine cdm repo:

Cast V2 cdm support
https://widevine-internal-review.googlesource.com/#/c/9190/

Add CASTv2 Support to DrmPlugin
https://widevine-internal-review.googlesource.com/#/c/9228/

Test for CastV2 authentication APIs
https://widevine-internal-review.googlesource.com/9550

Change-Id: I6d66bc1bbd653db5542c68687b30b441dd20617f

libwvdrmengine/mediadrm/include/WVGenericCryptoInterface.h

@@ -57,6 +57,33 @@ class WVGenericCryptoInterface {
                                     algorithm, signature, signature_length);
   }
 
+  virtual OEMCryptoResult openSession(OEMCrypto_SESSION *session) {
+    return OEMCrypto_OpenSession(session);
+  }
+
+  virtual OEMCryptoResult closeSession(OEMCrypto_SESSION session) {
+    return OEMCrypto_CloseSession(session);
+  }
+
+  virtual OEMCryptoResult loadDeviceRSAKey(OEMCrypto_SESSION session,
+                                           const uint8_t* wrapped_rsa_key,
+                                           size_t wrapped_rsa_key_length) {
+    return OEMCrypto_LoadDeviceRSAKey(session, wrapped_rsa_key,
+                                      wrapped_rsa_key_length);
+  }
+
+  virtual OEMCryptoResult generateRSASignature(
+      OEMCrypto_SESSION session,
+      const uint8_t* message,
+      size_t message_length,
+      uint8_t* signature,
+      size_t* signature_length,
+      RSA_Padding_Scheme padding_scheme) {
+  return OEMCrypto_GenerateRSASignature(session, message, message_length,
+                                        signature, signature_length,
+                                        padding_scheme);
+}
+
  private:
   DISALLOW_EVIL_CONSTRUCTORS(WVGenericCryptoInterface);
 };