/* xor.idc

   XORs each byte in the selected area with a byte specified by the user.
   Needed for honeynet.org's scan33.

   Eloy Paris <peloy@chapus.net>
   November 2004
*/

#include <idc.idc>

static xor(void)
{
    auto start, end, ptr;
    auto key;

    start = SelStart();
    if (start == BADADDR)
	return;

    end = SelEnd();
    if (end == BADADDR)
	return;

    end = end - 1; /* Otherwise we'll be off by one */

    key = AskLong(0, "Number to XOR selected area with:");
    if (key == -1)
	return;

    Message("XORing with 0x%x %d bytes starting at 0x%08x... ", key, end - start + 1, start);

    for (ptr = start; ptr <= end; ptr++)
	PatchByte(ptr, Byte(ptr) ^ key);

    Message("done.\n");
}