CD-ROM block driver/CD FS hook

[msaqib]

Hi everyone,

The requirement here is to somehow hook to the OS to come in between the UI and the CD ROM drive. The reason is that the data on the CD-ROM will be encrypted. The intermediate DLL will decrypt the data before it is handed over to the shell, provided the key is available. The use would already be obvious. Yes, I know, it's not worth it, but someone wants it.

My guess right now, is that I need to hook with either:

1- the CD-ROM block driver

2- the CDFS/UDFS?

Any ideas, which one I should go with, if at all I have caught the right end? Could this be OS version dependent?

Appreciate the help.

Saqib