我想使用 Android KeyChain 来存储公钥和私钥

Question

I want to store private key in android KeyChain. I write code to store key already. But I don't understand when uninstall app and clear app key lost or not. I want to store key in KeyChain when clear app or uninstall key still have.

try {
        Intent intent = KeyChain.createInstallIntent();
        intent.putExtra("PKEY", privateKey);
        intent.putExtra("KEY", publicKey);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
        return true;
    } catch (ActivityNotFoundException e) {
        Log.w("MainActivity", "could not store key pair: " + e);
    }

• Result debug code: picture debug result from KeyChain.createInstallIntent();

How can I retrieve private key from KeyChain.createInstallIntent()?

Answer 1

Intent stores data for only for some limited time.If you want to store key value data permanently I suggest to use Json Api.You have to create json API using PHP & manage your data by calling APi when you need in your android App.