必須註冊至少一個指紋才能創建需要用戶驗證的密鑰

Question

當我嘗試運行指紋驗證的示例應用程序時，會引發以下異常。

我試過的設備有：

三星S5（安卓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

您應該使用指紋管理檢查一個指紋識別器存在並且應用程序有權在嘗試生成密鑰之前使用它。

_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; 
    } 
}