Find out whether the device is full disk encrypted and what encryption was used?

Question

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. Whether the device is encrypted?
2. What encryption is used.

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.

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?

Answer 1

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;
    }