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FeIDo Middleware Android App

This is the Android prototype of the FeIDo client middleware. The middleware acts an intermediate between the eID, Credential Service, and browser extension.

Build Preparation

Note: Please fetch this repo as a submodule of the umbrella repo: https://github.com/feido-token/feido. Otherwise, the symoblic links to the FeIDo protobuf files will not resolve.

  1. Initialize the submodule(s):

    git submodule update --init --recursive

  2. Patch the ra-tls library:

    cd external/java-ra-tls-client
patch -p1 < ../../patches/patch_to_9ccbbd212a19125f77f8c8742df1926cff4a58d2_java-ra-tls-client.patch

  3. Manually configure the IP Addresses of the Credential Service and optionally adapt the port on which the middleware's websocket server should be listening for connections by the browser extension:

    In the LinearFEIDO.java source file, adapt the SGXIP (and optionally, SGXPort) fields to configure the address of the Credential Service to which the middleware will connect.

    Optionally, adapt the middleware's websocket server port by changing the webSocketServerPort field in the same source file.

Build Instructions

Open the folder in a recent version of Android Studio and build + install the app on an Android phone with NFC support.

We have successfully tested the prototype using a Samsung Galaxy S8 with Android 9 (Pie) installed.

Limitations

Note that the current version of the FeIDo middleware app is a proof of concept, not a production-ready prototype. The current implementation does not perform thorough cleanup and exception handling and might face callstack-related overflows.