Java Development

[pli]

Hi, expert,

as we know, at the blackberry phone, user could turn on the device memory encryption and media card encryption. We just wonder if there is any API to query if encryption is enabled or not. I did some search on the internet and I could not find any related answer on this. Just wonder if  there is any way for this such as testing of reading some particular file.

Thanks in advance for your insight on this.

[pli]

any one has any suggestions on this?

[RexDoug]

I'm guessing that you are referring to memory protection when the device is locked?

My only suggestion is to catch the exception that is thrown when you try to access the protected memory.

We ran into this with an email-related program - once the phone was locked, all memory is protected and access to the email from the store results in an exception.

[pli · Accepted solution]

Thanks a lot, with your suggestion, I found out that I could find out if device encrytion is enabled by creating a new file on the disk (for both device memory and sd card). If file creating is successful, check the file extension, it should have .rem extension if encryption is enabled. If file creation is failed if phone is locked (not always failing), if the error message would be specific error message, it would mean that encryption is enabled as well. However if it is some other error message, it is undertermined here. We would have to wait to make sure file creation could be successful to check.

[gbeukeboom · Accepted solution]

The PersistentContentListener will also help you to listen for this and better determine if Content Protection has been enabled/disabled and also determine when the device is locked so you can hold off until the device unlocks.

Cheers,

[pli]

Hi, Garett, 

thanks a lot for your reply. Your suggestion points me to correct path for how to detect the encryption for the device memory. For the media card encryption, we would still need the file test which I said at my above post.