diff --git a/common/status.h b/common/status.h
index 1d6597b..0f44f62 100644
--- a/common/status.h
+++ b/common/status.h
@@ -9,6 +9,7 @@
 #ifndef COMMON_STATUS_H_
 #define COMMON_STATUS_H_
 
+#include <iosfwd>
 #include <string>
 
 #include "util/error_space.h"
diff --git a/example/wvpl_cas_proxy_environment_example b/example/wvpl_cas_proxy_environment_example
index 4b3f80a..d75f24b 100644
Binary files a/example/wvpl_cas_proxy_environment_example and b/example/wvpl_cas_proxy_environment_example differ
diff --git a/example/wvpl_cas_proxy_session_example b/example/wvpl_cas_proxy_session_example
index 8114dba..2d68df6 100644
Binary files a/example/wvpl_cas_proxy_session_example and b/example/wvpl_cas_proxy_session_example differ
diff --git a/libwvpl_cas_proxy.so b/libwvpl_cas_proxy.so
index d953b7e..cb48965 100755
Binary files a/libwvpl_cas_proxy.so and b/libwvpl_cas_proxy.so differ
diff --git a/protos/public/license_protocol.proto b/protos/public/license_protocol.proto
index ddc7346..1f882e1 100644
--- a/protos/public/license_protocol.proto
+++ b/protos/public/license_protocol.proto
@@ -280,13 +280,13 @@ enum ProtocolVersion {
 
 message LicenseRequest {
   message ContentIdentification {
-    message CencDeprecated {
-      repeated bytes pssh = 1;
+    message WidevinePsshData {
+      repeated bytes pssh_data = 1;
       optional LicenseType license_type = 2;
       optional bytes request_id = 3;  // Opaque, client-specified.
     }
 
-    message WebmDeprecated {
+    message WebmKeyId {
       optional bytes header = 1;
       optional LicenseType license_type = 2;
       optional bytes request_id = 3;  // Opaque, client-specified.
@@ -313,8 +313,8 @@ message LicenseRequest {
 
     oneof content_id_variant {
       // Exactly one of these must be present.
-      CencDeprecated cenc_id_deprecated = 1;
-      WebmDeprecated webm_id_deprecated = 2;
+      WidevinePsshData widevine_pssh_data = 1;
+      WebmKeyId webm_key_id = 2;
       ExistingLicense existing_license = 3;
       InitData init_data = 4;
     }
diff --git a/sdk/external/common/wvpl/wvpl_sdk_environment.h b/sdk/external/common/wvpl/wvpl_sdk_environment.h
index dc0b9cc..6061181 100644
--- a/sdk/external/common/wvpl/wvpl_sdk_environment.h
+++ b/sdk/external/common/wvpl/wvpl_sdk_environment.h
@@ -127,7 +127,9 @@ class WvPLSDKEnvironment {
       const widevine::ProvisionedDeviceInfo& provisioned_device_info);
 
   static std::map<std::string, std::string>* GetConfigValue();
+
   friend class WvPLSDKSession;
+  friend class WvPLProxySession;
   friend class WvPLProxySessionTest;
   friend class WvPLSessionTest;
 };
diff --git a/sdk/external/common/wvpl/wvpl_sdk_session.h b/sdk/external/common/wvpl/wvpl_sdk_session.h
index 8b9c285..9d6c54b 100644
--- a/sdk/external/common/wvpl/wvpl_sdk_session.h
+++ b/sdk/external/common/wvpl/wvpl_sdk_session.h
@@ -113,6 +113,39 @@ class WvPLSDKSession {
    */
   virtual bool is_offline_license() const;
 
+  /**
+   * A session id that remains constant throughout a session. All license
+   * and heartbeat requests in a session have the same session id.
+   *
+   * @return string.
+   */
+  virtual std::string session_id() const;
+
+  /**
+   * Returns the license request contains client id or not.
+   *
+   * @return bool.
+   */
+  virtual bool has_client_id() const { return has_client_id_; }
+
+  /**
+   * Returns true if remote_attestation_cert_serial_number is not empty.
+   * Otherwise return false.
+   *
+   * @return bool.
+   */
+  virtual bool remote_attestation_verified() {
+    return !remote_attestation_cert_serial_number_.empty();
+  }
+
+  /**
+   * Returns true if license request has encrypted_client_id. Otherwise return
+   * false.
+   *
+   * @return bool.
+   */
+  virtual bool has_encrypted_client_id() { return has_encrypted_client_id_; }
+
  protected:
   const widevine::DrmRootCertificate* drm_root_certificate_;
   std::string user_agent_;
@@ -132,6 +165,9 @@ class WvPLSDKSession {
   std::string remote_attestation_cert_serial_number_;
   std::unique_ptr<widevine::LicenseRequest> sdk_license_request_;
   LicenseRequestType request_type_;
+  bool has_session_state_ = false;
+  bool has_encrypted_client_id_ = false;
+
   virtual WvPLStatus VerifyRemoteAttestation();
 
   // Returns the WvPL Client Capabilities information for the license request
@@ -140,11 +176,25 @@ class WvPLSDKSession {
       const widevine::ClientIdentification& client_id,
       WvPLClientCapabilities* client_capabilities) const;
 
-  // Copies/translates the output protection from a WvPL Key into an SDK
+  // Copy and translates the Key fields from a WvPL Key into an SDK
   // key container.
+  // Copies
+  // (1) key id
+  // (2) key
+  // (3) video_resolution_constraints
+  // (4) output protection using CopyOutputProtection
+  // (5) security_level using CopySecurityLevel
+  // Translates
+  // (1) key type
+  void CopyKey(const WvPLKey& wvpl_key,
+               widevine::License_KeyContainer* sdk_key_container);
+
+  // Copies/translates output_protection in WvPL Key into an SDK key container.
   void CopyOutputProtection(
-      const WvPLKey& wvpl_key,
-      widevine::License_KeyContainer* sdk_key_container);
+      const WvPLOutputProtection& wvpl_output_protection,
+      widevine::License_KeyContainer_OutputProtection* output_protection);
+
+  // Copies/translatessecurity_level in WvPL Key into an SDK key container.
   virtual void CopySecurityLevel(
       const WvPLOutputProtection& output_protection, TrackType track_type,
       widevine::License_KeyContainer* key_container);
@@ -154,12 +204,6 @@ class WvPLSDKSession {
   virtual void CopyPlaybackPolicy(const WvPLPlaybackPolicy& wvpl_policy,
                                   widevine::License_Policy* sdk_policy);
 
-  // Copy the |cgms_value| into the key container. A helper function for
-  // GenerateLicenseRequestAsJSON.
-  virtual void CopyCGMS(
-      CGMS cgms_value,
-      widevine::License_KeyContainer_OutputProtection* output_protection);
-
   // Copy the |hdcp_value| into the key container.
   virtual void CopyHDCP(
       HDCP hdcp_value,
diff --git a/sdk/external/common/wvpl/wvpl_types.h b/sdk/external/common/wvpl/wvpl_types.h
index 1f3a7aa..5b0369a 100644
--- a/sdk/external/common/wvpl/wvpl_types.h
+++ b/sdk/external/common/wvpl/wvpl_types.h
@@ -20,6 +20,7 @@
 // TODO(user) Split wvpl_types.h into wvpl_common_types.h ,
 // wvpl_license_sdk_types.h, wvpl_proxy_sdk_types.h and
 // wvpl_packager_sdk_types.h.
+// TODO(user) Expose Hdcpsrmrule into WvPLHdcpSrmRule.java.
 
 namespace widevine_server {
 namespace wv_pl_sdk {
@@ -40,6 +41,7 @@ enum KeyType {
   ENTITLEMENT = 2
 };
 
+// LINT.IfChange
 enum LicenseType {
   STREAMING = 1,
   OFFLINE = 2,
@@ -48,6 +50,7 @@ enum LicenseType {
 /**
  * Represents the type of message. This struct is used by Proxy SDK.
  */
+// LINT.IfChange
 enum MessageType {
   UNKNOWN = 0,
   LICENSE_REQUEST = 1,
@@ -95,6 +98,11 @@ enum SecurityLevel {
   HW_SECURE_ALL = 5
 };
 
+enum HdcpSrmRule {
+  HDCP_SRM_RULE_NONE = 0,
+  CURRENT_SRM = 1,
+};
+
 enum DeviceSecurityLevel {
   DEVICE_LEVEL_UNSPECIFIED = 0,
   DEVICE_LEVEL_1 = 1,
@@ -125,6 +133,41 @@ enum AnalogOutputCapabilities {
   ANALOG_OUTPUT_SUPPORTS_CGMS_A = 3,
 };
 
+/*
+ * Defines the type wrapper for wvpl request.
+ */
+struct WvPLRequestType {
+  WvPLRequestType() {
+    message_type_ = UNKNOWN;
+    license_type_ = STREAMING;
+    license_request_type_ = REQUEST_TYPE_UNSPECIFIED;
+  }
+
+  void set_message_type(MessageType message_type) {
+    message_type_ = message_type;
+  }
+  MessageType message_type() const { return message_type_; }
+
+  void set_license_type(LicenseType license_type) {
+    license_type_ = license_type;
+  }
+  LicenseType license_type() const { return license_type_; }
+
+  void set_license_request_type(LicenseRequestType license_request_type) {
+    license_request_type_ = license_request_type;
+  }
+  LicenseRequestType license_request_type() const {
+    return license_request_type_;
+  }
+
+  // Type of the message, default value is UNKNOWN.
+  MessageType message_type_;
+  // Type of the license, default value is Streaming.
+  LicenseType license_type_;
+  // Type of the license request, default value is REQUEST_TYPE_UNSPECIFIED.
+  LicenseRequestType license_request_type_;
+};
+
 struct WvPLPlaybackPolicy {
   WvPLPlaybackPolicy() {
     license_duration_seconds_ = 0;
@@ -370,6 +413,7 @@ struct WvPLVideoResolutionConstraint {
 struct WvPLOutputProtection {
   WvPLOutputProtection() {
     hdcp_ = HDCP_NONE;
+    hdcp_srm_rule_ = HDCP_SRM_RULE_NONE;
     secure_data_path_ = false;
     security_level_ = SECURITY_LEVEL_UNDEFINED;
     disable_analog_output_ = false;
@@ -412,9 +456,17 @@ struct WvPLOutputProtection {
 
   CGMS cgms() const { return cgms_; }
 
+  void set_hdcp_srm_rule(HdcpSrmRule hdcp_srm_rule) {
+    hdcp_srm_rule_ = hdcp_srm_rule;
+  }
+
+  HdcpSrmRule hdcp_srm_rule() const { return hdcp_srm_rule_; }
+
   // Indicates whether HDCP is required on digital outputs. Default is None.
   HDCP hdcp_;
 
+  HdcpSrmRule hdcp_srm_rule_;
+
   // Crypto operations and handling of the media must be performed within a
   // hardware backed trusted environment.  Default is false.
   bool secure_data_path_;
@@ -932,6 +984,83 @@ struct WvPLWidevinePsshData {
   std::list<WvPLEntitledKey> entitled_keys_;
 };
 
+struct WvPLCasKey {
+  WvPLCasKey() {}
+
+  void set_odd_key_id(const std::string& odd_key_id) {
+    odd_key_id_ = odd_key_id;
+  }
+
+  const std::string& odd_key_id() const { return odd_key_id_; }
+
+  void set_odd_key_bytes(const std::string& odd_key_bytes) {
+    odd_key_bytes_ = odd_key_bytes;
+  }
+
+  const std::string& odd_key_bytes() const { return odd_key_bytes_; }
+
+  void set_even_key_id(const std::string& even_key_id) {
+    even_key_id_ = even_key_id;
+  }
+
+  const std::string& even_key_id() const { return even_key_id_; }
+
+  void set_even_key_bytes(const std::string& even_key_bytes) {
+    even_key_bytes_ = even_key_bytes;
+  }
+
+  const std::string& even_key_bytes() const { return even_key_bytes_; }
+
+  void set_track_type(const TrackType track_type) { track_type_ = track_type; }
+
+  TrackType track_type() const { return track_type_; }
+
+  void set_output_protection(const WvPLOutputProtection& out_prot) {
+    output_protection_ = out_prot;
+  }
+
+  void set_requested_output_protection(const WvPLOutputProtection& out_prot) {
+    requested_output_protection_ = out_prot;
+  }
+
+  const WvPLOutputProtection& output_protection() const {
+    return output_protection_;
+  }
+
+  const WvPLOutputProtection& requested_output_protection() const {
+    return requested_output_protection_;
+  }
+
+  WvPLOutputProtection* mutable_output_protection() {
+    return &output_protection_;
+  }
+
+  WvPLOutputProtection* mutable_requested_output_protection() {
+    return &requested_output_protection_;
+  }
+
+  void set_key_type(const KeyType key_type) { key_type_ = key_type; }
+
+  KeyType key_type() const { return key_type_; }
+
+  // 'Odd' Key slot identifier.
+  std::string odd_key_id_;
+  // 'Odd' Key slot.
+  std::string odd_key_bytes_;
+  // 'Even' Key slot identifier.
+  std::string even_key_id_;
+  // 'Even' Key slot.
+  std::string even_key_bytes_;
+  // track type.
+  TrackType track_type_ = TRACK_TYPE_UNSPECIFIED;
+  // Required output protection.
+  WvPLOutputProtection output_protection_;
+  // Requested output protection.
+  WvPLOutputProtection requested_output_protection_;
+  // Key type from the KeyType enumeration.
+  KeyType key_type_ = ENTITLEMENT;
+};
+
 }  // namespace wv_pl_sdk
 }  // namespace widevine_server