小贝子编程

无法在安卓上创建密钥对



我正在玩安卓中的密钥，并试图生成一个公共/私有加密密钥对。不幸的是，我不断收到"密钥存储异常：无效的密钥blob"。

我正在按照这里的说明进行操作：

https://developer.android.com/training/articles/keystore.html

特别是标题为"生成新私钥"的部分，我觉得我的代码几乎逐字复制：

try {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_EC, "AndroidKeyStore");
keyGen.initialize(
new KeyGenParameterSpec.Builder(
keyName,
KeyProperties.PURPOSE_SIGN | KeyProperties.PURPOSE_VERIFY)
.setDigests(KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512).build()
);
KeyPair pair = keyGen.generateKeyPair();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (InvalidAlgorithmParameterException e) {
e.printStackTrace();
}

keyName的值来自用户输入，但我也尝试过使用值"abc"。

我得到的错误是：

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.calebg.claimcreator, PID: 17389
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:6579)
at android.view.View.performClickInternal(View.java:6556)
at android.view.View.access$3100(View.java:777)
at android.view.View$PerformClick.run(View.java:25660)
at android.os.Handler.handleCallback(Handler.java:819)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:6579) 
at android.view.View.performClickInternal(View.java:6556) 
at android.view.View.access$3100(View.java:777) 
at android.view.View$PerformClick.run(View.java:25660) 
at android.os.Handler.handleCallback(Handler.java:819) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 
Caused by: java.security.ProviderException: Failed to load generated key pair from keystore
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:530)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:478)
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:727)
at com.example.calebg.claimcreator.CreateKeyActivity.createKey(CreateKeyActivity.java:76)
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java:6579) 
at android.view.View.performClickInternal(View.java:6556) 
at android.view.View.access$3100(View.java:777) 
at android.view.View$PerformClick.run(View.java:25660) 
at android.os.Handler.handleCallback(Handler.java:819) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 
Caused by: java.security.UnrecoverableKeyException: Failed to obtain X.509 form of public key
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:239)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:278)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:289)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:521)
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:478) 
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:727) 
at com.example.calebg.claimcreator.CreateKeyActivity.createKey(CreateKeyActivity.java:76) 
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java:6579) 
at android.view.View.performClickInternal(View.java:6556) 
at android.view.View.access$3100(View.java:777) 
at android.view.View$PerformClick.run(View.java:25660) 
at android.os.Handler.handleCallback(Handler.java:819) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 
Caused by: android.security.KeyStoreException: Invalid key blob
at android.security.KeyStore.getKeyStoreException(KeyStore.java:823)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:241)
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:278) 
at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:289) 
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.loadKeystoreKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:521) 
at android.security.keystore.AndroidKeyStoreKeyPairGeneratorSpi.generateKeyPair(AndroidKeyStoreKeyPairGeneratorSpi.java:478) 
at java.security.KeyPairGenerator$Delegate.generateKeyPair(KeyPairGenerator.java:727) 
at com.example.calebg.claimcreator.CreateKeyActivity.createKey(CreateKeyActivity.java:76) 
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java:6579) 
at android.view.View.performClickInternal(View.java:6556) 
at android.view.View.access$3100(View.java:777) 
at android.view.View$PerformClick.run(View.java:25660) 
at android.os.Handler.handleCallback(Handler.java:819) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 

我正在使用Android Studio 3.0.1，minSdkVersion 23，targetSdkVersion 26，并且正在"Nexus 6 API P"虚拟设备上进行测试。

我发现的唯一另一个相关的堆栈溢出问题(也是唯一的谷歌结果)看起来很有帮助的是：

android.security.KeyStoreException： 无效的密钥 blob

但是，我不清楚如何将答案应用于我的情况，并且我不相信这是我的正确解决方案(当我刚刚初始化密钥库时，它如何被锁定/取消初始化？捕获异常并再次尝试如何解决此问题？

谁能确定我做错了什么？

我在尝试在 Android-P 上运行我的应用程序时遇到了同样的问题，我认为他们对密钥库进行了一些更改 查看预览，我想知道您的物理设备是否运行在 Android P 上？

我在真实设备上尝试过这个，它可以工作。不知道为什么，但由于某种原因，Android 模拟器无法根据 Android 文档创建密钥。

你可以试试下面的代码，它是基于AES-128加密算法的。

public void RandomKey(View view)
{
int[] Keys = new int[16];
String keyString ="";

//reset the secret key into null
Secret_Key="";
SecretKey.setText(Secret_Key);
try
{
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
keyGen.init(128); // 128 bit
javax.crypto.SecretKey secretKey = keyGen.generateKey(); //generate secret key
SKey= secretKey.getEncoded();
// to display
for (int i = 0; i < 16; i++)
{
Keys[i] = SKey[i] & 0x000000FF;//convert byte to integer
keyString = Integer.toHexString(Keys[i]);
if (keyString.length() < 2)
{
keyString="0"+keyString;
}
//Log.d("keys are"," "+i+keyString);
Secret_Key = Secret_Key + " " + keyString;
}
SecretKey.setAllCaps(true);
SecretKey.setText(Secret_Key);
}

有关更完整的程序，您可以参考以下内容： https://github.com/aliakbarpa/AES-128_for_Android

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