Add property to check if user forces L3

[ Merge of go/wvgerrit/186611 ]

Android user can set the property using the developer option.

Bug: 301669353
Change-Id: I730b635f6cc28dfb0471c1d679627c94b9e16af1

libwvdrmengine/Android.bp

@@ -129,6 +129,7 @@ cc_defaults {
         "libwvdrmdrmplugin_aidl",
         "libwvlevel3",
         "lib_apex_manifest_minimal_proto_lite",
+        "libPlatformProperties",
     ],
 }
 
@@ -227,6 +228,7 @@ cc_library_static {
     static_libs: [
         "libprotobuf-cpp-lite",
         "lib_apex_manifest_minimal_proto_lite",
+        "libPlatformProperties",
     ],
 
     min_sdk_version: "34",
@@ -286,6 +288,7 @@ cc_library {
         "libwvdrmdrmplugin_aidl",
         "libwvlevel3",
         "lib_apex_manifest_minimal_proto_lite",
+        "libPlatformProperties",
     ],
 
     shared_libs: [

libwvdrmengine/cdm/core/include/properties.h

@@ -82,6 +82,8 @@ class Properties {
   static bool GetSandboxId(std::string* sandbox_id);
   static bool AlwaysUseKeySetIds();
   static bool UseProviderIdInProvisioningRequest();
+  // Cdm only loads L3 library when this returns true
+  static bool ForceL3();
 
   static bool GetSecurityLevelDirectories(std::vector<std::string>* dirs);
   static bool GetApplicationId(const CdmSessionId& session_id,

libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp

@@ -794,6 +794,7 @@ class Adapter {
           wvcdm::metrics::OEMCrypto_INITIALIZED_FORCING_L3);
       return result;
     }
+
     LOGI("L3 Initialized. Trying L1.");
     std::vector<std::string> library_names;
     if (!wvcdm::Properties::GetOEMCryptoPaths(&library_names)) {
@@ -1376,9 +1377,15 @@ class Adapter {
   std::mutex session_map_lock_;
   std::vector<uint8_t> sandbox_id_;
 
-  // For running the unit tests using the level 3 oemcrypto.  If the user sets
+  // First check if user sets force L3 property to be true. Then
-  // the environment FORCE_LEVEL3_OEMCRYPTO, we ignore the level 1 library.
+  // check if the user sets the environment FORCE_LEVEL3_OEMCRYPTO
+  // for running the unit tests using the level 3 oemcrypto.
+  // If any of above is true, we ignore the level 1 library.
   bool force_level3() {
+    if (wvcdm::Properties::ForceL3()) {
+      LOGW("User requested falling back to L3");
+      return true;
+    }
     const char* var = getenv("FORCE_LEVEL3_OEMCRYPTO");
     if (!var) return false;
     return !strcmp(var, "yes");

libwvdrmengine/cdm/src/properties_android.cpp

@@ -10,11 +10,13 @@
 #include <string>
 
 #include <android-base/properties.h>
+#include <android/sysprop/WidevineProperties.sysprop.h>
 
 #include "log.h"
 #include "wv_android_constants.h"
 #include "widevine_apex_info.h"
 
+using namespace android::sysprop;
 namespace {
 
 const char kBasePathPrefix[] = "/data/vendor/mediadrm/IDM";
@@ -211,4 +213,8 @@ bool Properties::AlwaysUseKeySetIds() { return false; }
 
 bool Properties::UseProviderIdInProvisioningRequest() { return false; }
 
+bool Properties::ForceL3() {
+  return WidevineProperties::forcel3_enabled().value_or(false);
+}
+
 }  // namespace wvcdm

libwvdrmengine/cdm/test/integration-test.mk

@@ -60,6 +60,7 @@ LOCAL_STATIC_LIBRARIES := \
     libwvlevel3 \
     libwv_kdo \
     libwv_odk \
+    libPlatformProperties \
 
 LOCAL_SHARED_LIBRARIES := \
     libbase \

libwvdrmengine/oemcrypto/test/common.mk

@@ -52,6 +52,7 @@ LOCAL_STATIC_LIBRARIES := \
   libcdm_utils \
   libwv_kdo \
   libwv_odk \
+  libPlatformProperties \
 
 LOCAL_SHARED_LIBRARIES := \
   libbase \

libwvdrmengine/test/Android.bp

@@ -55,6 +55,7 @@ cc_test {
         "libwv_odk",
 	"libwvdrmdrmplugin_aidl",
         "libwvlevel3",
+        "libPlatformProperties",
     ],
     shared_libs: [
         "android.hardware.drm-V1-ndk",