Including OpenSSL .so libraries for Android? (resolved)

m_d — Thu, 08 Sep 2022 18:00:53 GMT

All,

I'd love to know how you included the two OpenSSL libraries in your Unreal project for Android. I've done a ton of Googling; research suggests the right way to do this is to create a plugin.

Using the ArcGIS SDK plugin as a model along with the little that exists in the way of docs, I've cobbled together a plugin that will copy the libcrypto_1_1.so and libssl_1_1.so files to the libs/arm64-v8a directory in the .apk.

However, I get one of two problems at runtime:

* If I follow the Esri doc and create a very simple AndroidOpenSSL.Build.cs file that merely calls the AdditionalPropertiesForReceipt.Add function, I get a runtime dialog box saying Unreal couldn't find the module "AndroidOpenSSL".

* If I add lines calling "PublicAdditionalLibraries.Add" for each of the two OpenSSL libraries, the app crashes on startup, and LogCat tells me "dlopen failed: library "libcrypto.so.1.1" not found: needed by /data/app/~~4rD_korI4tweVUi6c70fBA==/com.esri.apl.myproj3-lsFLIEb_hOa95NYNOXaEzg==/lib/arm64/libUnreal.so in namespace classloader-namespace".

Most of the unreal forum discussions on this date back to 2015-2016 and most don't have any responses to the question. Any help you can give here would be greatly appreciated.

[Edit] I should add that the libcrypto and libssl libraries in question were compiled from source and target an arm64 architecture. They function just fine in a Unity app.

Thanks in advance.

[Update]

While it would be most elegant to create a plugin for the Android OpenSSL libraries, in the interest of time I tried modifying the ArcGISMapsSDK plugin.

I added the two .so files to <project>\Plugins\ArcGISMapsSDK\Binaries\ThirdParty\ArcGISMapsSDK\Android\arm64
Modified <project>\Plugins\ArcGISMapsSDK\Source\ArcGISMapsSDK\ArcGISMapsSDK_APL.xml to include these lines:

This seems to do the trick. I'll just keep a copy of this augmented ArcGISMapsSDK Plugin for use in future projects.

topic Including OpenSSL .so libraries for Android? (resolved) in ArcGIS Maps SDK for Unreal Engine Questions

Including OpenSSL .so libraries for Android? (resolved)