Android Keyring

Pure Rust integration of Android's KeyStore and Android's SharedPreferences with crate keyring.

The Java API is called by using JNI, so no actual Java code needs to be inserted in the end project. Only the initialization function as an instance of android.content.Context is needed in order to fetch a SharedPreferences instance.

Experimental

This project should not be deemed mature enough for production level or sensitive applications.

Activating Android Keyring

Insert the following Kotlin code into your Android project:

package io.crates.keyring;
import android.content.Context
class Keyring {
    companion object {
        init {
            // See Note 1
            System.loadLibrary("android_keyring")
        }

        external fun setAndroidKeyringCredentialBuilder(context: Context);
    }
}

From your main activity, initialize the credential builder, e.g:

class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    Keyring.setAndroidKeyringCredentialBuilder(this);

Note 1: This code expects that a library file libandroid_keyring.so was compiled with the contents of this package. Depending on how the project is managed, the library loading may need to be adjusted or not needed at all.