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/cdm/core/include/cdm_engine.h

@@ -80,11 +80,15 @@ class CdmEngine : public TimerHandler {
 
   // Provisioning related methods
   virtual CdmResponseType GetProvisioningRequest(
+      CdmCertificateType cert_type,
+      const std::string& cert_authority,
       CdmProvisioningRequest* request,
       std::string* default_url);
 
   virtual CdmResponseType HandleProvisioningResponse(
-      CdmProvisioningResponse& response);
+      CdmProvisioningResponse& response,
+      std::string* cert,
+      std::string* wrapped_key);
 
   // Secure stop related methods
   virtual CdmResponseType GetSecureStops(CdmSecureStops* secure_stops);

libwvdrmengine/cdm/core/include/certificate_provisioning.h

@@ -13,14 +13,18 @@ class CdmSession;
 
 class CertificateProvisioning {
  public:
-  CertificateProvisioning() {};
+  CertificateProvisioning() : cert_type_(kCertificateWidevine) {};
   ~CertificateProvisioning() {};
 
   // Provisioning related methods
   CdmResponseType GetProvisioningRequest(SecurityLevel requested_security_level,
+                                         CdmCertificateType cert_type,
+                                         const std::string& cert_authority,
                                          CdmProvisioningRequest* request,
                                          std::string* default_url);
-  CdmResponseType HandleProvisioningResponse(CdmProvisioningResponse& response);
+  CdmResponseType HandleProvisioningResponse(CdmProvisioningResponse& response,
+                                             std::string* cert,
+                                             std::string* wrapped_key);
 
  private:
   void ComposeJsonRequestAsQueryString(const std::string& message,
@@ -30,6 +34,7 @@ class CertificateProvisioning {
                          const std::string& end_substr,
                          std::string* result);
   CryptoSession crypto_session_;
+  CdmCertificateType cert_type_;
 
   CORE_DISALLOW_COPY_AND_ASSIGN(CertificateProvisioning);
 };

libwvdrmengine/cdm/core/include/wv_cdm_types.h

@@ -64,6 +64,11 @@ enum CdmSecurityLevel {
   kSecurityLevelUnknown
 };
 
+enum CdmCertificateType {
+  kCertificateWidevine,
+  kCertificateX509,
+};
+
 struct CdmDecryptionParameters {
   bool is_encrypted;
   bool is_secure;