无法在 Android 上创建密钥对

Question

我正在玩转 android 中的密钥并尝试生成 public/private 密码 key-pair。不幸的是，我一直收到 'KeyStoreException: Invalid key blob'.

我正在按照此处的说明进行操作：

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

特别是标题为 'Generating a New Private Key' 的部分，我觉得我的代码几乎是逐字复制的：

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"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$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
            at android.view.View.performClick(View.java:6579)
            at android.view.View.performClickInternal(View.java:6556)
            at android.view.View.access00(View.java:777)
            at android.view.View$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.access00(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.access00(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.access00(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.access00(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，我正在 "Nexus 6 API P" 虚拟设备上进行测试。

我发现的唯一其他相关的 Whosebug 问题（也是唯一的 google 结果）看起来有帮助：

但是我不清楚如何将答案应用于我的情况，并且我不相信它是我的情况下的正确解决方案（当我刚刚初始化时，密钥库怎么可能是 locked/uninitialised ? 捕获异常并重试如何解决这个问题？)。

谁能指出我做错了什么？

Answer 1

您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);
    }

更完整的程序可以参考这个： https://github.com/aliakbarpa/AES-128_for_Android

Answer 2

我在真机上试过了，效果很好。不知道为什么，但出于某种原因，Android 模拟器无法根据 Android 文档创建密钥。

Answer 3

我在 Android-P 上尝试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 See the preview，我想知道您的物理设备是否运行AndroidP？

无法在 Android 上创建密钥对

Can't create a KeyPair on Android

java

android

key-pair