我尝试为某些设备生成密钥时遇到了错误。我能在运行4.4.2的三星Galaxy Note上重现该错误。
java.lang.IllegalStateException: could not generate key in keystore
at android.security.AndroidKeyPairGenerator.generateKeyPair(AndroidKeyPairGenerator.java:100)
at java.security.KeyPairGenerator$KeyPairGeneratorImpl.generateKeyPair(KeyPairGenerator.java:275)
at com.eric.demo.MainActivity.generateKeyPair(MainActivity.java:65)
at com.eric.demo.MainActivity.onClickButton(MainActivity.java:43)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3964)
at android.view.View.performClick(View.java:4640)
at android.view.View$PerformClick.run(View.java:19421)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5476)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
at dalvik.system.NativeStart.main(Native Method)
我创建了一个小应用程序,只需逐行从Android开发者页面复制代码即可生成密钥。具体请参见“生成新的私有密钥” https://developer.android.com/training/articles/keystore.html
public void onClickButton (View view) {
try {
generateKeyPair(this, "test3");
} catch (Exception e){
Log.wtf("exception", e);
}
}
private void generateKeyPair(Context context, String alias)
throws Exception {
Calendar cal = Calendar.getInstance();
Date now = cal.getTime();
cal.add(Calendar.YEAR, 1);
Date end = cal.getTime();
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "AndroidKeyStore");
kpg.initialize(new KeyPairGeneratorSpec.Builder(getApplicationContext())
.setAlias(alias)
.setStartDate(now)
.setEndDate(end)
.setSerialNumber(BigInteger.valueOf(1))
.setSubject(new X500Principal("CN=test3"))
.build());
KeyPair kp = kpg.generateKeyPair();
}
错误似乎发生在AndroidKeyPairGenerator.java中的kpg.generateKeyPair()函数内:
if (!mKeyStore.generate(privateKeyAlias, KeyStore.UID_SELF, keyType,
mSpec.getKeySize(), mSpec.getFlags(), args)) {
throw new IllegalStateException("could not generate key in keystore");
}
同时在KeyStore.java文件中:
public boolean generate(String key, int uid, int keyType, int keySize, int flags,
byte[][] args) {
try {
return mBinder.generate(key, uid, keyType, keySize, flags, args) == NO_ERROR;
} catch (RemoteException e) {
Log.w(TAG, "Cannot connect to keystore", e);
return false;
}
}
mBinder.generate()的调用似乎返回2,这意味着密钥库已被锁定?
// ResponseCodes
public static final int NO_ERROR = 1;
public static final int LOCKED = 2;
public static final int UNINITIALIZED = 3;
public static final int SYSTEM_ERROR = 4;
public static final int PROTOCOL_ERROR = 5;
public static final int PERMISSION_DENIED = 6;
public static final int KEY_NOT_FOUND = 7;
public static final int VALUE_CORRUPTED = 8;
public static final int UNDEFINED_ACTION = 9;
public static final int WRONG_PASSWORD = 10;
错误可能与密钥库的问题有关,与此问题有些相关:https://code.google.com/p/android/issues/detail?id=177459&q=could%20not%20generate%20key%20in%20keystore&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars
我尝试了以下几种方法和它们的组合:
1. 设置加密需求。结果是另一个错误:“如果需要加密,则 Android 密钥库必须处于已初始化并解锁状态”
2. 设置锁屏(图案、PIN、无锁屏、密码、滑动)。同样的行为
3. 以编程方式尝试使用 startActivity(new Intent("com.android.credentials.UNLOCK"));
或 startActivity(new Intent("com.android.credentials.RESET"));
解锁或重置凭据存储。尝试解锁会显示“为凭据存储输入密码”的消息,其中没有合理的密码可用,即使清除凭据也没有帮助。