必须至少注册一个指纹才能创建需要每次使用都经过用户身份验证的密钥

Question

当我尝试运行用于指纹验证的示例应用程序时，将引发以下异常。

我尝试过的设备是：

三星S5（Android 6.0.1 API 23）

07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err: java.security.InvalidAlgorithmParameterException: java.lang.IllegalStateException: At least one fingerprint must be enrolled to create keys requiring user authentication for every use
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.security.keystore.AndroidKeyStoreKeyGeneratorSpi.engineInit(AndroidKeyStoreKeyGeneratorSpi.java:238)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.security.keystore.AndroidKeyStoreKeyGeneratorSpi$AES.engineInit(AndroidKeyStoreKeyGeneratorSpi.java:53)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at javax.crypto.KeyGenerator.init(KeyGenerator.java:189)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at com.netfinitymedia.notubeapp.authentication.VerificationActivity.generateKey(VerificationActivity.java:177)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at com.netfinitymedia.notubeapp.authentication.VerificationActivity.initialize(VerificationActivity.java:131)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at com.netfinitymedia.notubeapp.authentication.VerificationActivity.onCreate(VerificationActivity.java:63)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.Activity.performCreate(Activity.java:6876)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1135)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3206)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3349)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.ActivityThread.access$1100(ActivityThread.java:221)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.os.Looper.loop(Looper.java:158)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7224)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err: Caused by: java.lang.IllegalStateException: At least one fingerprint must be enrolled to create keys requiring user authentication for every use
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.security.keystore.KeymasterUtils.addUserAuthArgs(KeymasterUtils.java:115)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:     at android.security.keystore.AndroidKeyStoreKeyGeneratorSpi.engineInit(AndroidKeyStoreKeyGeneratorSpi.java:234)
07-08 03:31:57.796 30558-30558/com.netfinitymedia.notubeapp W/System.err:   ... 17 more

Answer 1

在尝试生成密钥之前，您应该使用指纹管理器检查指纹读取器是否存在以及应用程序是否有权使用它。

_fingerprintManager = (FingerprintManager) _context.getSystemService(FINGERPRINT_SERVICE);

public boolean fingerprintEnabled()
{
    if (!_fingerprintManager.isHardwareDetected())
    {
        // Device doesn't support fingerprint authentication
        return false;
    }
    else if (ActivityCompat.checkSelfPermission(_context, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED)
    {
        return false;
    }
    else if (!_keyguardManager.isKeyguardSecure())
    {
        return false;
    }
    else if (!_fingerprintManager.hasEnrolledFingerprints())
    {
        // User hasn't enrolled any fingerprints to authenticate with
        return false;
    }
    else
    {
        // Everything is ready for fingerprint authentication
        return true;
    }
}