当我使用需要用户身份验证才能使用密钥的 AndroidKeyStore 时,我的应用程序进入无限循环
.setUserAuthenticationRequired(true);
.setUserAuthenticationValidityDurationSeconds(60);
假设使用用户私钥的操作需要设备已解锁,否则UserNotAuthenticatedException
被生成。应用程序必须显示设备身份验证屏幕,并且密钥的下次使用才会起作用。
但是,就我而言总是被抛出UserNotAuthenticatedException
强制应用程序显示解锁屏幕。它仅发生在某些设备中。我有两台运行 Android 6.0.1 的 Nexus 5,只有其中一台出现故障。
这是活动的主要代码
KeyPair keyPair;
private void attemptRegisterKey(){
try{
//generate key pair using AndroidKeyStore only once.
if (keyPair != null)
generateKeyPair(alias);
//Sample Signature
Signature sig = Signature.getInstance("SHA256withRSA");
sig.initSign(keyPair.getPrivate());
sig.update("hello".getBytes());
byte signature[] = sig.sign();
}catch (UserNotAuthenticatedException e){
//show Authentication Screen
Intent intent = mKeyguardManager.createConfirmDeviceCredentialIntent(null, null);
startActivityForResult(intent, REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {
// Challenge completed, proceed
if (resultCode == RESULT_OK) {
attemptRegisterKey();
} else {
//Process error
}
}
}
以及生成密钥的代码
public KeyPair generateKeyPair(String alias) throws Exception {
KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore");
keyStore.load(null);
KeyPairGenerator kpg = KeyPairGenerator.getInstance(
KeyProperties.KEY_ALGORITHM_RSA, "AndroidKeyStore");
KeyGenParameterSpec.Builder builder = new KeyGenParameterSpec.Builder(
alias,
KeyProperties.PURPOSE_SIGN | KeyProperties.PURPOSE_VERIFY)
.setDigests(KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512)
.setSignaturePaddings(KeyProperties.SIGNATURE_PADDING_RSA_PKCS1)
.setUserAuthenticationRequired(true);
.setUserAuthenticationValidityDurationSeconds(60);
kpg.initialize(builder.build());
KeyPair kp = kpg.generateKeyPair();
return kp;
}