bug: setAuthTag fails with invalid authentication tag length

[samuelscheit]

I have set up the example application and ran the createCipher/createDecipher unit test. All tests pass except the last one which returns the following error for the test setAutoPadding/setAuthTag/setAAD:

Invalid authentication tag length

I've debugged the problem and it does not matter if you use Buffer.from("auth_tag") (just like the unit test) or Uint8Array or ArrayBuffer as tag input, the auth_tag_len_ variable (in MGLCipherHostObject.cpp) is always 0.