sosdanax.blogg.se - Best kext utility

#Best kext utility serial#
#Best kext utility driver#
#Best kext utility code#

I suspect that triggering an error from the generic driver will be faster than trying to decipher the mac driver.MagicPrefs is more than 5 years old now and is no longer mantained, the functionality it provided was made possible by Api's that are now deprecated and reverse engineered private Apple frameworks.

#Best kext utility serial#

In most cases the communications with these cameras are very simple serial communications. You can do a pull request on the generic driver. Instead, if your current webcam isn't working with your linux distro, I would first confirm that you have the proper generic driver, and then edit the generic driver to support your camera. At any rate, you wont be able to directly convert the KeXT into a Linux Kernal Module. You will be most interested in reading the parts of the driver that define the communication with the camera. It certainly wouldn't hurt to analyze the driver for your own edification, but you may find that it gets most of its work done by calling mac system libraries that don't work the same way in linux. I would be less worried about the c++/C difference versus differences in system libaries, and the system call interface. Regarding the Utility of reversing a Macintosh Kernal extension: At any rate, watching the actual communications with the camera will give you a much better idea of what you need to do. Most webcam's on Linux use this driver:, and potentially you can just run this driver and see where it dies/can't communicate with the camera. I believe these cameras are fairly generic bits of hardware at this point. I think in that case, you could just adapt a driver from an existing webcam, and see where it dies. The first time I read your question, I thought you meant a small camera outside your computer, but I am guessing you mean a camera built into your laptop. You might also be able to open up the camera, and speak to it directly via a debug port (think JTAG, or even simpler.) Depending on the complexity of your camera, you may be able to speak to it directly without a driver over serial. I would start from a different direction, and reverse engineer the camera itself. The wiki page found at: gives some great ideas for where you should be starting on the mac side of things.īased on their to do list, you might want to focus on helping rip the device firmware from the device itself. The wiki on this site is informative, and lists some of the issues with reverse engineering this sort of driver. The thread states that there is already a project underway to make a driver for the camera, which can be found at It seems that the camera in question is referenced in the conversation found here: Įssentially, this camera speaks over PCI because it does not compress its video before being sent to the system. Here is a snippet from a book on kernal exploitation that takes you through the basics of reversing a kext with IDA pro: There is a class at recon on this subject this year: (once the white paper is published, it should be linked in this answer) Also, to pull this off correctly, you will need to learn a little about Macintosh system programming. Given enough time I would go through both processes just for the sake of knowing.

#Best kext utility code#

You are trying to rewrite a driver from this anyway, seeing things in a format that resembles source code will help that process.īut to each his own.

Nor do you need to check the exact position of anything in memory.

There isn't an element of obfuscation here.

Their use will most likely be self evident in the driver once you see their relation to other functions

You will get more out of this by searching over and analyzing specific function calls in the driver.

If you don't know what you are looking for, you could spend a long, long time single stepping. I personally would start with a static analysis tool because: I can't answer the "static analysis or dynamic analysis?" question directly, since often the answer is "both, depending on exactly what you want." Some Reverse Engineers start with the static, and some start with the dynamic. Yes, you will have to learn what C++ structures look like once disassembled. You can reverse Kernal Extensions with IDA Pro, Radare2, GDB or whatever dissasembler you would like.