Add Cdm support for Cast provision 4.0 flow

Bug: 259455235
Test: CorePIGTest.CastReceiverProvisioning*
Merged from https://widevine-internal-review.googlesource.com/174150

Change-Id: I8d546a73a64a71a4d61225d9c6d14d893decce22

libwvdrmengine/cdm/core/include/certificate_provisioning.h

@@ -82,7 +82,8 @@ class CertificateProvisioning {
   CdmResponseType GetProvisioning40RequestInternal(
       wvutil::FileSystem* file_system, const std::string& origin,
       const std::string& spoid, CdmProvisioningRequest* request,
-      std::string* default_url);
+      std::string* default_url, CdmCertificateType cert_type,
+      const std::string& cert_authority);
   CdmResponseType FillEncryptedClientId(
       const std::string& client_token,
       video_widevine::ProvisioningRequest& provisioning_request,
@@ -93,7 +94,14 @@ class CertificateProvisioning {
       video_widevine::ProvisioningRequest& provisioning_request,
       const ServiceCertificate& service_certificate);
   CdmResponseType HandleProvisioning40Response(
-      wvutil::FileSystem* file_system, const std::string& response_message);
+      wvutil::FileSystem* file_system,
+      const video_widevine::SignedProvisioningMessage& signed_message,
+      std::string* cert, std::string* wrapped_key);
+  // Assign the cert type for provisioning request
+  // Required by Cast cert provisioning flow
+  CdmResponseType CertTypeAssign(
+      video_widevine::ProvisioningRequest& provisioning_request,
+      CdmCertificateType cert_type, const std::string& cert_authority);
 
   CdmResponseType SetSpoidParameter(
       const std::string& origin, const std::string& spoid,
@@ -120,6 +128,8 @@ class CertificateProvisioning {
   std::string provisioning_40_wrapped_private_key_;
   // Key type of the generated key pair in provisioning 4.
   CryptoWrappedKey::Type provisioning_40_key_type_;
+  // Store the last provisioning request message
+  std::string provisioning_request_message_;
 
   CORE_DISALLOW_COPY_AND_ASSIGN(CertificateProvisioning);
 };