Trying to connect to SMB fails

AVD Pixel 2 with API 27. In commit 1d0f73ae (probably also master).

? E/TrustyKeymaster: calling trusty_keymaster_call insize 199 msg size 203
    Received 4 byte response
    Error: Response of size 4 contained error code -33
com.amaze.filemanager W/System.err: java.security.UnrecoverableKeyException: Failed to obtain information about key
com.amaze.filemanager W/System.err:     at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreSecretKeyFromKeystore(AndroidKeyStoreProvider.java:282)
        at android.security.keystore.AndroidKeyStoreSpi.engineGetKey(AndroidKeyStoreSpi.java:98)
        at java.security.KeyStore.getKey(KeyStore.java:1062)
        at com.amaze.filemanager.utils.files.CryptUtil.getSecretKey(CryptUtil.java:386)
        at com.amaze.filemanager.utils.files.CryptUtil.aesEncryptPassword(CryptUtil.java:276)
        at com.amaze.filemanager.utils.files.CryptUtil.encryptPassword(CryptUtil.java:478)
        at com.amaze.filemanager.utils.SmbUtil.getSmbEncryptedPath(SmbUtil.java:56)
        at com.amaze.filemanager.ui.dialogs.SmbConnectDialog.lambda$onCreateDialog$2$SmbConnectDialog(SmbConnectDialog.java:268)
        at com.amaze.filemanager.ui.dialogs.SmbConnectDialog$$Lambda$2.onClick(Unknown Source:62)
        at com.afollestad.materialdialogs.MaterialDialog.onClick(MaterialDialog.java:410)
        at android.view.View.performClick(View.java:6294)
        at android.view.View$PerformClick.run(View.java:24770)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
com.amaze.filemanager W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
? W/audio_hw_generic: Not supplying enough data to HAL, expected position 5063939 , only wrote 5063760
com.amaze.filemanager W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
com.amaze.filemanager W/System.err: Caused by: android.security.KeyStoreException: Invalid key blob
        at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
        at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreSecretKeyFromKeystore(AndroidKeyStoreProvider.java:283)
    	... 18 more
? W/audio_hw_generic: Not supplying enough data to HAL, expected position 5370045 , only wrote 5217840
system_process W/WindowManager: removeWindowToken: Attempted to remove non-existing token: android.os.Binder@5bf9659

Start with SmbConnectDialog.java:268 and follow the call through SmbUtil.java:56 and CryptUtil.java:276, 386, and 478. Reproduce the SMB connection on an API 27 Pixel 2 using commit 1d0f73ae, then determine what successful connection behavior should replace the Invalid key blob failure.