了解设备是否是完整的磁盘加密和使用什么加密？ [英] Find out whether the device is full disk encrypted and what encryption was used?

问题描述

由于支持Android 3.0全磁盘加密，但我看不到任何API。我需要知道的两个具体事项是：

Since Android 3.0 full disk encryption is supported, but I can't see any API to that ability. The two specific things I need to know are:

1. 设备是否加密？


2. 什么使用加密。

我发现了一个低级别的进程这里，似乎建议使用的加密是128 AES与CBC和ESSIV：SHA256，但它不谈论一种方法来查找设备已加密。

I found a low level explanation of the process here and it seems to suggest the encryption used is 128 AES with CBC and ESSIV:SHA256, but it does not talk about a way to find whether the device is encrypted.

所以，我的应用程序是否可以查询设备是否使用完整磁盘加密功能，或者我需要诉诸于hacky解决方案Runtime.exec调用？

So, is there a way my app can query whether the device is using the full disk encryption feature, or do I need to resort to hacky solutions like Runtime.exec calls?

推荐答案

正如@Mikle所提及的，您只需调用 DevicePolicyManager 并请求状态

As @Mikle mentions you can just call the DevicePolicyManager and ask it the status

@SuppressLint("NewApi")
    private boolean isEncrypted(Context context) {
        DevicePolicyManager devicePolicyManager = (DevicePolicyManager) context
                .getSystemService(Context.DEVICE_POLICY_SERVICE);

        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
            int status = devicePolicyManager.getStorageEncryptionStatus();
            if (DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE == status) {
                return true;
            }
        }
        return false;
    }

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