blocks|key|108628|text|我尝试了一下这个link，并且工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|108629|首先你需要设置sdk的最小外观，就像图片|108630|​|108631|📷|atomic|108632|108633|Mainfest中的第二个设置权限|108634|+++<uses-permission+android:name="android.permission.USE_FINGERPRINT"+/>|code-block|syntax|javascript|108635|第三|108636|108637|+generateKey()函数，该函数生成加密密钥，然后将其安全地存储在设备上。|blockquote|108638|108639|cipherInit()函数，用于初始化将用于创建加密FingerprintManager的密码。|108640|CryptoObject实例和各种其他检查，然后启动身份验证过程，这是在onCreate()方法中实现的。|108641|108642|FingerPrintActivty.java|style|BOLD|CODE|108643|import+android.Manifest;
import+android.annotation.TargetApi;
import+android.app.KeyguardManager;
import+android.content.pm.PackageManager;
import+android.hardware.fingerprint.FingerprintManager;
import+android.os.Build;
import+android.security.keystore.KeyGenParameterSpec;
import+android.security.keystore.KeyPermanentlyInvalidatedException;
import+android.security.keystore.KeyProperties;
import+android.support.v4.app.ActivityCompat;
import+android.support.v7.app.AppCompatActivity;
import+android.os.Bundle;
import+android.widget.TextView;
import+java.io.IOException;
import+java.security.InvalidAlgorithmParameterException;
import+java.security.InvalidKeyException;
import+java.security.KeyStore;
import+java.security.KeyStoreException;
import+java.security.NoSuchAlgorithmException;
import+java.security.NoSuchProviderException;
import+java.security.UnrecoverableKeyException;
import+java.security.cert.CertificateException;
import+javax.crypto.Cipher;
import+javax.crypto.KeyGenerator;
import+javax.crypto.NoSuchPaddingException;
import+javax.crypto.SecretKey;
+
+
public+class+FingerprintActivity+extends+AppCompatActivity+{
+
+
+++private+KeyStore+keyStore;
+++//+Variable+used+for+storing+the+key+in+the+Android+Keystore+container
+++private+static+final+String+KEY_NAME+=+"androidHive";
+++private+Cipher+cipher;
+++private+TextView+textView;
+
+
+++@Override
+++protected+void+onCreate(Bundle+savedInstanceState)+{
+++++++super.onCreate(savedInstanceState);
+++++++setContentView(R.layout.activity_fingerprint);
+
+
+++++++//+Initializing+both+Android+Keyguard+Manager+and+Fingerprint+Manager
+++++++KeyguardManager+keyguardManager+=+(KeyguardManager)+getSystemService(KEYGUARD_SERVICE);
+++++++FingerprintManager+fingerprintManager+=+(FingerprintManager)+getSystemService(FINGERPRINT_SERVICE);
+
+
+++++++textView+=+(TextView)+findViewById(R.id.errorText);
+
+
+++++++//+Check+whether+the+device+has+a+Fingerprint+sensor.
+++++++if(!fingerprintManager.isHardwareDetected()){
+++++++++++/**
++++++++++++*+An+error+message+will+be+displayed+if+the+device+does+not+contain+the+fingerprint+hardware.
++++++++++++*+However+if+you+plan+to+implement+a+default+authentication+method,
++++++++++++*+you+can+redirect+the+user+to+a+default+authentication+activity+from+here.
++++++++++++*+Example:
++++++++++++*+Intent+intent+=+new+Intent(this,+DefaultAuthenticationActivity.class);
++++++++++++*+startActivity(intent);
++++++++++++*/
+++++++++++textView.setText("Your+Device+does+not+have+a+Fingerprint+Sensor");
+++++++}else+{
+++++++++++//+Checks+whether+fingerprint+permission+is+set+on+manifest
+++++++++++if+(ActivityCompat.checkSelfPermission(this,+Manifest.permission.USE_FINGERPRINT)+!=+PackageManager.PERMISSION_GRANTED)+{
+++++++++++++++textView.setText("Fingerprint+authentication+permission+not+enabled");
+++++++++++}else{
+++++++++++++++//+Check+whether+at+least+one+fingerprint+is+registered
+++++++++++++++if+(!fingerprintManager.hasEnrolledFingerprints())+{
+++++++++++++++++++textView.setText("Register+at+least+one+fingerprint+in+Settings");
+++++++++++++++}else{
+++++++++++++++++++//+Checks+whether+lock+screen+security+is+enabled+or+not
+++++++++++++++++++if+(!keyguardManager.isKeyguardSecure())+{
+++++++++++++++++++++++textView.setText("Lock+screen+security+not+enabled+in+Settings");
+++++++++++++++++++}else{
+++++++++++++++++++++++generateKey();
+
+
+++++++++++++++++++++++if+(cipherInit())+{
+++++++++++++++++++++++++++FingerprintManager.CryptoObject+cryptoObject+=+new+FingerprintManager.CryptoObject(cipher);
+++++++++++++++++++++++++++FingerprintHandler+helper+=+new+FingerprintHandler(this);
+++++++++++++++++++++++++++helper.startAuth(fingerprintManager,+cryptoObject);
+++++++++++++++++++++++}
+++++++++++++++++++}
+++++++++++++++}
+++++++++++}
+++++++}
+++}
+
+
+++@TargetApi(Build.VERSION_CODES.M)
+++protected+void+generateKey()+{
+++++++try+{
+++++++++++keyStore+=+KeyStore.getInstance("AndroidKeyStore");
+++++++}+catch+(Exception+e)+{
+++++++++++e.printStackTrace();
+++++++}
+
+
+++++++KeyGenerator+keyGenerator;
+++++++try+{
+++++++++++keyGenerator+=+KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES,+"AndroidKeyStore");
+++++++}+catch+(NoSuchAlgorithmException+%7C+NoSuchProviderException+e)+{
+++++++++++throw+new+RuntimeException("Failed+to+get+KeyGenerator+instance",+e);
+++++++}
+
+
+++++++try+{
+++++++++++keyStore.load(null);
+++++++++++keyGenerator.init(new
+++++++++++++++++++KeyGenParameterSpec.Builder(KEY_NAME,
+++++++++++++++++++KeyProperties.PURPOSE_ENCRYPT+%7C
+++++++++++++++++++++++++++KeyProperties.PURPOSE_DECRYPT)
+++++++++++++++++++.setBlockModes(KeyProperties.BLOCK_MODE_CBC)
+++++++++++++++++++.setUserAuthenticationRequired(true)
+++++++++++++++++++.setEncryptionPaddings(
+++++++++++++++++++++++++++KeyProperties.ENCRYPTION_PADDING_PKCS7)
+++++++++++++++++++.build());
+++++++++++keyGenerator.generateKey();
+++++++}+catch+(NoSuchAlgorithmException+%7C
+++++++++++++++InvalidAlgorithmParameterException
+++++++++++++++%7C+CertificateException+%7C+IOException+e)+{
+++++++++++throw+new+RuntimeException(e);
+++++++}
+++}
+
+
+++@TargetApi(Build.VERSION_CODES.M)
+++public+boolean+cipherInit()+{
+++++++try+{
+++++++++++cipher+=+Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES+%2B+"/"+%2B+KeyProperties.BLOCK_MODE_CBC+%2B+"/"+%2B+KeyProperties.ENCRYPTION_PADDING_PKCS7);
+++++++}+catch+(NoSuchAlgorithmException+%7C+NoSuchPaddingException+e)+{
+++++++++++throw+new+RuntimeException("Failed+to+get+Cipher",+e);
+++++++}
+
+
+++++++try+{
+++++++++++keyStore.load(null);
+++++++++++SecretKey+key+=+(SecretKey)+keyStore.getKey(KEY_NAME,
+++++++++++++++++++null);
+++++++++++cipher.init(Cipher.ENCRYPT_MODE,+key);
+++++++++++return+true;
+++++++}+catch+(KeyPermanentlyInvalidatedException+e)+{
+++++++++++return+false;
+++++++}+catch+(KeyStoreException+%7C+CertificateException+%7C+UnrecoverableKeyException+%7C+IOException+%7C+NoSuchAlgorithmException+%7C+InvalidKeyException+e)+{
+++++++++++throw+new+RuntimeException("Failed+to+init+Cipher",+e);
+++++++}
+++}
}|108644|FingerprintAuthenticationHandler.Class|108645|import+android.Manifest;
import+android.app.Activity;
import+android.content.Context;
import+android.content.pm.PackageManager;
import+android.hardware.fingerprint.FingerprintManager;
import+android.os.CancellationSignal;
import+android.support.v4.app.ActivityCompat;
import+android.support.v4.content.ContextCompat;
import+android.widget.TextView;
+
+
/**
*+Created+by+whit3hawks+on+11/16/16.
*/
public+class+FingerprintHandler+extends+FingerprintManager.AuthenticationCallback+{
+
+
+++private+Context+context;
+
+
+++//+Constructor
+++public+FingerprintHandler(Context+mContext)+{
+++++++context+=+mContext;
+++}
+
+
+++public+void+startAuth(FingerprintManager+manager,+FingerprintManager.CryptoObject+cryptoObject)+{
+++++++CancellationSignal+cancellationSignal+=+new+CancellationSignal();
+++++++if+(ActivityCompat.checkSelfPermission(context,+Manifest.permission.USE_FINGERPRINT)+!=+PackageManager.PERMISSION_GRANTED)+{
+++++++++++return;
+++++++}
+++++++manager.authenticate(cryptoObject,+cancellationSignal,+0,+this,+null);
+++}
+
+
+++@Override
+++public+void+onAuthenticationError(int+errMsgId,+CharSequence+errString)+{
+++++++this.update("Fingerprint+Authentication+error\n"+%2B+errString,+false);
+++}
+
+
+++@Override
+++public+void+onAuthenticationHelp(int+helpMsgId,+CharSequence+helpString)+{
+++++++this.update("Fingerprint+Authentication+help\n"+%2B+helpString,+false);
+++}
+
+
+++@Override
+++public+void+onAuthenticationFailed()+{
+++++++this.update("Fingerprint+Authentication+failed.",+false);
+++}
+
+
+++@Override
+++public+void+onAuthenticationSucceeded(FingerprintManager.AuthenticationResult+result)+{
+++++++this.update("Fingerprint+Authentication+succeeded.",+true);
+++}
+
+
+++public+void+update(String+e,+Boolean+success){
+++++++TextView+textView+=+(TextView)+((Activity)context).findViewById(R.id.errorText);
+++++++textView.setText(e);
+++++++if(success){
+++++++++++textView.setTextColor(ContextCompat.getColor(context,R.color.colorPrimaryDark));
+++++++}
+++}
}|108646|希望能有所帮助。|108647|entityMap|0|LINK|mutability|MUTABLE|url|http://www.androidhive.info/2016/11/android-add-fingerprint-authentication/|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/d89c87ae6f8727373f9e8d4970e57271.png|imageAlt^0|8|4|0|0|0|0|0|1|1|0|0|0|0|0|0|0|0|0|0|0|0|N|0|N|0|0|0|12|0|0|0^^$0|@$1|2|3|4|5|6|7|1V|8|@]|9|@$A|1W|B|1X|1|1Y]]|C|$]]|$1|D|3|E|5|6|7|1Z|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|20|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|21|8|@]|9|@$A|22|B|23|1|24]]|C|$]]|$1|K|3|G|5|6|7|25|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|26|8|@]|9|@]|C|$]]|$1|N|3|O|5|P|7|27|8|@]|9|@]|C|$Q|R]]|$1|S|3|T|5|6|7|28|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|29|8|@]|9|@]|C|$]]|$1|V|3|W|5|X|7|2A|8|@]|9|@]|C|$]]|$1|Y|3|-4|5|6|7|2B|8|@]|9|@]|C|$]]|$1|Z|3|10|5|6|7|2C|8|@]|9|@]|C|$]]|$1|11|3|12|5|6|7|2D|8|@]|9|@]|C|$]]|$1|13|3|-4|5|6|7|2E|8|@]|9|@]|C|$]]|$1|14|3|15|5|6|7|2F|8|@$A|2G|B|2H|16|17]|$A|2I|B|2J|16|18]]|9|@]|C|$]]|$1|19|3|1A|5|P|7|2K|8|@]|9|@]|C|$Q|R]]|$1|1B|3|1C|5|6|7|2L|8|@$A|2M|B|2N|16|17]]|9|@]|C|$]]|$1|1D|3|1E|5|P|7|2O|8|@]|9|@]|C|$Q|R]]|$1|1F|3|1G|5|6|7|2P|8|@]|9|@]|C|$]]|$1|1H|3|-4|5|6|7|2Q|8|@]|9|@]|C|$]]]|1I|$1J|$5|1K|1L|1M|C|$1N|1O]]|1P|$5|1Q|1L|1R|C|$1S|1T|1U|-4]]]]

i try this <a href="http://www.androidhive.info/2016/11/android-add-fingerprint-authentication/" rel="nofollow noreferrer">link</a> and work perfectly .
First you need to set Minimum sdk look like the Picture
<a href="https://i.stack.imgur.com/BFtwO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BFtwO.png" alt="Image " /></a>
Second set Permission in Mainfest
<pre><code> &lt;uses-permission android:name=&quot;android.permission.USE_FINGERPRINT&quot; /&gt;
</code></pre>
Third
<blockquote>
generateKey() function which generates an encryption key which is then stored securely on the device.
cipherInit() function that initializes the cipher that will be used to create the encrypted FingerprintManager.
CryptoObject instance and various other checks before initiating the authentication process which is implemented inside onCreate() method.
</blockquote>
<code>FingerPrintActivty.java</code>
<pre><code>import android.Manifest;
import android.annotation.TargetApi;
import android.app.KeyguardManager;
import android.content.pm.PackageManager;
import android.hardware.fingerprint.FingerprintManager;
import android.os.Build;
import android.security.keystore.KeyGenParameterSpec;
import android.security.keystore.KeyPermanentlyInvalidatedException;
import android.security.keystore.KeyProperties;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
 
 
public class FingerprintActivity extends AppCompatActivity {
 
 
 private KeyStore keyStore;
 // Variable used for storing the key in the Android Keystore container
 private static final String KEY_NAME = &quot;androidHive&quot;;
 private Cipher cipher;
 private TextView textView;
 
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_fingerprint);
 
 
 // Initializing both Android Keyguard Manager and Fingerprint Manager
 KeyguardManager keyguardManager = (KeyguardManager) getSystemService(KEYGUARD_SERVICE);
 FingerprintManager fingerprintManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE);
 
 
 textView = (TextView) findViewById(R.id.errorText);
 
 
 // Check whether the device has a Fingerprint sensor.
 if(!fingerprintManager.isHardwareDetected()){
 /**
 * An error message will be displayed if the device does not contain the fingerprint hardware.
 * However if you plan to implement a default authentication method,
 * you can redirect the user to a default authentication activity from here.
 * Example:
 * Intent intent = new Intent(this, DefaultAuthenticationActivity.class);
 * startActivity(intent);
 */
 textView.setText(&quot;Your Device does not have a Fingerprint Sensor&quot;);
 }else {
 // Checks whether fingerprint permission is set on manifest
 if (ActivityCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
 textView.setText(&quot;Fingerprint authentication permission not enabled&quot;);
 }else{
 // Check whether at least one fingerprint is registered
 if (!fingerprintManager.hasEnrolledFingerprints()) {
 textView.setText(&quot;Register at least one fingerprint in Settings&quot;);
 }else{
 // Checks whether lock screen security is enabled or not
 if (!keyguardManager.isKeyguardSecure()) {
 textView.setText(&quot;Lock screen security not enabled in Settings&quot;);
 }else{
 generateKey();
 
 
 if (cipherInit()) {
 FingerprintManager.CryptoObject cryptoObject = new FingerprintManager.CryptoObject(cipher);
 FingerprintHandler helper = new FingerprintHandler(this);
 helper.startAuth(fingerprintManager, cryptoObject);
 }
 }
 }
 }
 }
 }
 
 
 @TargetApi(Build.VERSION_CODES.M)
 protected void generateKey() {
 try {
 keyStore = KeyStore.getInstance(&quot;AndroidKeyStore&quot;);
 } catch (Exception e) {
 e.printStackTrace();
 }
 
 
 KeyGenerator keyGenerator;
 try {
 keyGenerator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES, &quot;AndroidKeyStore&quot;);
 } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
 throw new RuntimeException(&quot;Failed to get KeyGenerator instance&quot;, e);
 }
 
 
 try {
 keyStore.load(null);
 keyGenerator.init(new
 KeyGenParameterSpec.Builder(KEY_NAME,
 KeyProperties.PURPOSE_ENCRYPT |
 KeyProperties.PURPOSE_DECRYPT)
 .setBlockModes(KeyProperties.BLOCK_MODE_CBC)
 .setUserAuthenticationRequired(true)
 .setEncryptionPaddings(
 KeyProperties.ENCRYPTION_PADDING_PKCS7)
 .build());
 keyGenerator.generateKey();
 } catch (NoSuchAlgorithmException |
 InvalidAlgorithmParameterException
 | CertificateException | IOException e) {
 throw new RuntimeException(e);
 }
 }
 
 
 @TargetApi(Build.VERSION_CODES.M)
 public boolean cipherInit() {
 try {
 cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + &quot;/&quot; + KeyProperties.BLOCK_MODE_CBC + &quot;/&quot; + KeyProperties.ENCRYPTION_PADDING_PKCS7);
 } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
 throw new RuntimeException(&quot;Failed to get Cipher&quot;, e);
 }
 
 
 try {
 keyStore.load(null);
 SecretKey key = (SecretKey) keyStore.getKey(KEY_NAME,
 null);
 cipher.init(Cipher.ENCRYPT_MODE, key);
 return true;
 } catch (KeyPermanentlyInvalidatedException e) {
 return false;
 } catch (KeyStoreException | CertificateException | UnrecoverableKeyException | IOException | NoSuchAlgorithmException | InvalidKeyException e) {
 throw new RuntimeException(&quot;Failed to init Cipher&quot;, e);
 }
 }
}
</code></pre>
FingerprintAuthenticationHandler.Class
<pre><code>import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.fingerprint.FingerprintManager;
import android.os.CancellationSignal;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.widget.TextView;
 
 
/**
* Created by whit3hawks on 11/16/16.
*/
public class FingerprintHandler extends FingerprintManager.AuthenticationCallback {
 
 
 private Context context;
 
 
 // Constructor
 public FingerprintHandler(Context mContext) {
 context = mContext;
 }
 
 
 public void startAuth(FingerprintManager manager, FingerprintManager.CryptoObject cryptoObject) {
 CancellationSignal cancellationSignal = new CancellationSignal();
 if (ActivityCompat.checkSelfPermission(context, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
 return;
 }
 manager.authenticate(cryptoObject, cancellationSignal, 0, this, null);
 }
 
 
 @Override
 public void onAuthenticationError(int errMsgId, CharSequence errString) {
 this.update(&quot;Fingerprint Authentication error\n&quot; + errString, false);
 }
 
 
 @Override
 public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
 this.update(&quot;Fingerprint Authentication help\n&quot; + helpString, false);
 }
 
 
 @Override
 public void onAuthenticationFailed() {
 this.update(&quot;Fingerprint Authentication failed.&quot;, false);
 }
 
 
 @Override
 public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
 this.update(&quot;Fingerprint Authentication succeeded.&quot;, true);
 }
 
 
 public void update(String e, Boolean success){
 TextView textView = (TextView) ((Activity)context).findViewById(R.id.errorText);
 textView.setText(e);
 if(success){
 textView.setTextColor(ContextCompat.getColor(context,R.color.colorPrimaryDark));
 }
 }
}
</code></pre>
Hope it help.

blocks|key|2864139|text|你可以在github上看到这个:希望它能帮助你：Confirm+Credentials+|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2864140|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/abennsir/android-ConfirmCredential^0|O|K|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

you can see this one on github: hope it will help you : <a href="https://github.com/abennsir/android-ConfirmCredential" rel="nofollow noreferrer">Confirm Credentials </a>

When I enrol first and only fingerprint and generate <code>KeyPair</code> the <code>PrivateKey</code> gets invalidated when I use it for the second time. This happens only once. Am I the only one having this issue? Is there something wrong with my code?

I cannot use any other key as I'm using <code>PrivateKey</code> to sign data.

Steps:

<ol>
<li>Wipe all fingerprints</li>
<li>Enrol one fingerprint</li>
<li>Generate <code>KeyPair</code> and use <code>FingerprintManager :: authenticate</code></li>
<li>During next use of <code>FingerprintManager :: authenticate PrivateKey</code> gets permanently invalidated. This happens only for the first time</li>
</ol>

Below the code where I generate the <code>KeyPair</code>

<pre><code>KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore");
keystore.load(null);
KeyPairGenerator generator = KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_EC, "AndroidKeyStore");
generator.initialize(new KeyGenParameterSpec.Builder("key_name", KeyProperties.PURPOSE_SIGN)
 .setDigests(digest) // I have defined digest before
 .setSignaturePaddings(paddings) // I have defined paddings before
 .setUserAuthenticationRequired(true)
 .build());
generator.generateKeyPair();
</code></pre>

And here is the code where I invoke fingerprint authentication for data signing:

<pre><code>KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore");
keyStore.load(null);
Signature signature = Signature.getInstance("signing_algorithm");
PrivateKey privateKey = (PrivateKey) keyStore.getKey("key_name", null);
signature.initSign(privateKey); // Here I get KeyPermanentlyInvalidatedException
CryptoObject crypto = new CryptoObject(signature);
FingerprintManager fingerprintManager = context.getSystemService(FingerprintManager.class);
CancellationSignal cancellationSignal = new CancellationSignal();
AuthenticationCallback authenticationCallback = new AuthenticationCallback() {
 ...
};
fingerprintManager.authenticate(crypto, cancelationSignal, 0, authenticationCallback, null);
</code></pre>

Android Fingerprint API and Private/Public keys

身份验证

Android

当我首先注册并且只注册指纹并生成KeyPair时，当我第二次使用PrivateKey时，它就失效了。这种情况只会发生一次。我是唯一一个有这个问题的人吗？我的代码有什么问题吗？我不能使用任何其他密钥，因为我正在使用PrivateKey对数据进行签名。步骤：擦除所有fingerprintsEnrol one fingerp...

问Android指纹API和私钥/公钥
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