Update to support OEMCrypto v16 with ODK

common/output_protection_util.cc

@@ -0,0 +1,54 @@
+////////////////////////////////////////////////////////////////////////////////
+// Copyright 2019 Google LLC.
+//
+// This software is licensed under the terms defined in the Widevine Master
+// License Agreement. For a copy of this agreement, please contact
+// widevine-licensing@google.com.
+////////////////////////////////////////////////////////////////////////////////
+
+#include "common/output_protection_util.h"
+
+namespace widevine {
+namespace op_util {
+
+Status VerifyDeviceCapabilities(
+    const ClientIdentification::ClientCapabilities& device_capabilities,
+    const License::KeyContainer::OutputProtection& output_protection,
+    bool* should_disable_analog_output) {
+  bool device_has_analog_output =
+      device_capabilities.analog_output_capabilities() !=
+          ClientIdentification::ClientCapabilities::ANALOG_OUTPUT_NONE &&
+      device_capabilities.analog_output_capabilities() !=
+          ClientIdentification::ClientCapabilities::ANALOG_OUTPUT_UNKNOWN;
+
+  if (should_disable_analog_output != nullptr) {
+    *should_disable_analog_output = false;
+  }
+  if (device_has_analog_output) {
+    if (output_protection.disable_analog_output() &&
+        !device_capabilities.can_disable_analog_output()) {
+      return Status(error::PERMISSION_DENIED,
+                    "Analog out cannot be disabled on this device.");
+    }
+    if (output_protection.cgms_flags() !=
+        License::KeyContainer::OutputProtection::CGMS_NONE) {
+      if (device_capabilities.analog_output_capabilities() !=
+          ClientIdentification::ClientCapabilities::
+              ANALOG_OUTPUT_SUPPORTS_CGMS_A) {
+        if (!device_capabilities.can_disable_analog_output()) {
+          return Status(
+              error::PERMISSION_DENIED,
+              "Analog out cannot be disabled on this device, no CGMS.");
+        }
+        // This device does not have support for CGMS protections.
+        if (should_disable_analog_output != nullptr) {
+          *should_disable_analog_output = true;
+        }
+      }
+    }
+  }
+  return OkStatus();
+}
+
+}  // namespace op_util
+}  // namespace widevine