Java.lang.RuntimeException: Failed to start Cipher using FingerPrint

Question

I use the sdk fingerprint and always break it.

java.lang.RuntimeException: Failed to init Cipher                                                                                               
at com.example.ammar.fingerbyitself.MainActivity.initCipher(MainActivity.java:160)
at com.example.ammar.fingerbyitself.MainActivity.access$000(MainActivity.java:55)
at com.example.ammar.fingerbyitself.MainActivity$1.onClick(MainActivity.java:109)
at android.view.View.performClick(View.java:5697)
at android.widget.TextView.performClick(TextView.java:10814)
at android.view.View$PerformClick.run(View.java:22526)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.security.InvalidKeyException: Only SecretKey is supported
at com.android.org.conscrypt.OpenSSLCipher.checkAndSetEncodedKey(OpenSSLCipher.java:435)
at com.android.org.conscrypt.OpenSSLCipher.engineInit(OpenSSLCipher.java:260)
at javax.crypto.Cipher.tryTransformWithProvider(Cipher.java:612)
at javax.crypto.Cipher.tryCombinations(Cipher.java:532)
at javax.crypto.Cipher.getSpi(Cipher.java:437)
at javax.crypto.Cipher.init(Cipher.java:815)
at javax.crypto.Cipher.init(Cipher.java:774)
at com.example.ammar.fingerbyitself.MainActivity.initCipher(MainActivity.java:153)
at com.example.ammar.fingerbyitself.MainActivity.access$000(MainActivity.java:55) 
at com.example.ammar.fingerbyitself.MainActivity$1.onClick(MainActivity.java:109) 
at android.view.View.performClick(View.java:5697) 
at android.widget.TextView.performClick(TextView.java:10814) 
at android.view.View$PerformClick.run(View.java:22526) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:158) 
at android.app.ActivityThread.main(ActivityThread.java:7229) 
at java.lang.reflect.Method.invoke(Native Method) 

When I call CIPHERinit ()

private boolean initCipher() {
        try {
//            KeyStore mKeyStore = KeyStore.getInstance("AndroidKeyStore");
            mKeyStore.load(null);
            SecretKey key = (SecretKey) mKeyStore.getKey(KEY_NAME, null);
            mCipher.init(Cipher.ENCRYPT_MODE, key);
            return true;
        } catch (KeyPermanentlyInvalidatedException e) {
            return false;
        } catch (KeyStoreException | CertificateException | UnrecoverableKeyException | IOException
                | NoSuchAlgorithmException | InvalidKeyException e) {

            throw new RuntimeException("Failed to init Cipher", e);
        }
    }

Why these failures are not clear, even the same code is downloaded from GitHub.

Answer 1

I was getting this error when the SecretKeyone I passed to the function initwas actually null.

However, I created a library for fingerprint authentication. You can take a picture:

FingerprintDialog.initialize(this)
    .title(R.string.title)
    .message(R.string.message)
    .callback(new FingerprintDialogCallback() {
        @Override public void onAuthenticationSucceeded() {}
        @Override public void onAuthenticationCancel() {}
    })
    .show();

Fingerprint library

You can use CryptoObject or not.

Answer 2

FingerPrintDialog createKey, . createKey initCipher

Answer 3

This is because KEY_NAME is not a private key. You can try another way to initiate the private key using

SecretKey key = keyGenerator.generateKey();

With keyGenerator, I am sure of the source code. It works for me