On Fri, May 17, 2013 at 3:35 PM, Oliver Schinagl <oliver+l...@schinagl.nl> wrote:
(...) > While initially these fuses are used to somewhat determin the chipID, these > appear to be writeable by the user and thus can be used for other purpouses. > For example storing a 128 bit root key, a unique serial number, which could > then even be used as a MAC address. (...) Then follows some code to read out the keys from sysfs I guess.. > +static int __init sid_probe(struct platform_device *pdev) It's really simple to actually make the kernel use this to seed the entropy pool. #include <linux/random.h> add_device_randomness(u8 *, num); If you know after probe that you can read out a number of bytes of device-unique data, I think you should add those bytes to the entropy pool like this. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
