--- /dev/null
+/*
+ * Copyright 2011 X-Scale. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY X-Scale ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL X-Scale OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of X-Scale.
+ *
+ * This software provides an algorithm that emulates the protection scheme of
+ * N64 PIF/CIC-NUS-6105, by determining the proper response to each challenge.
+ * It was synthesized after a careful, exhaustive and detailed analysis of the
+ * challenge/response pairs stored in the 'pif2.dat' file from Project 64.
+ * These challenge/response pairs were the only resource used during this
+ * project. There was no kind of physical access to N64 hardware.
+ *
+ * This project would have never been possible without the contribuitions of
+ * the following individuals and organizations:
+ *
+ * - Oman: For being at the right place at the right time and being brave
+ * enough to pay a personal price so we could understand in a much deeper
+ * way how this magical console really works. We owe you so much.
+ *
+ * - Jovis: For all the positive energy and impressive hacking spirit that you
+ * shared with the N64 community. You were absolutely instrumental in
+ * several key events that shaped the N64 community in the last 14 years.
+ * Even if you're not physically with us anymore, your heritage, your
+ * knowledge and your attitude will never be forgotten.
+ *
+ * 'The candle that burns twice as bright burns half as long.'
+ *
+ * - LaC: For the endless contributions that you've given to the N64 community
+ * since the early days, when N64 was the next big thing. I've always
+ * admired the deep knowledge that you've gathered about the most little
+ * hardware details. Recently, you challanged us to find a small and
+ * concise algorithm that would emulate the behaviour of CIC-NUS-6105
+ * challenge/response protection scheme and here is the final result.
+ * LaC, Oman and Jovis were definitly the dream team of N64 reversing in
+ * the late 90's. Without your contributions, we would be much poorer.
+ *
+ * - marshall: For keeping the N64 scene alive during the last decade, when
+ * most people lost interest and moved along to different projects. You
+ * are the force that has been keeping us all together in the later
+ * years. When almost nobody cared about N64 anymore, you were always
+ * there, spreading the word, developing in the console, and lately,
+ * making impressive advances on the hardware side. I wish the best
+ * success to your new 64drive project.
+ *
+ * - hcs: For your contributions to the better understanding of the inner
+ * workings of the Reality Co-Processor (RCP). Your skills have impressed
+ * me for a long time now. And without your precious help by sharing your
+ * kownledge, I would have never understood the immense importance of
+ * Oman, Jovis and LaC achievements. Thank you !
+ *
+ * - Azimer & Tooie: For sharing with the N64 community your findings about the
+ * challenge/response pair used in 'Jet Force Gemini' and the 267
+ * challenge/response pairs used in 'Banjo Tooie', all stored in the
+ * 'pif2.dat' file of Project 64. They were instrumental to the final
+ * success of this endeavour.
+ *
+ * - Silicon Graphics, Inc. (SGI): For creating MIPS R4000, MIPS R4300 and
+ * Reality Co-Processor (RCP). You were the ultimate dream creator during
+ * the late 80's and early 90's. A very special word of gratitude goes to
+ * the two teams that during those years created RCP and MIPS R4300. They
+ * were technological breakthroughs back then.
+ *
+ * On a personal note, I would like to show my deepest gratitude to _Bijou_,
+ * for being always a source of endless hope and inspiration.
+ *
+ * -= X-Scale =- (#n64dev@EFnet)
+ */
+
+#include "n64_cic_nus_6105.h"
+
+void n64_cic_nus_6105(char chl[], char rsp[], int len)
+{
+ static char lut0[0x10] = {
+ 0x4, 0x7, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
+ 0xC, 0xF, 0x8, 0xF, 0x6, 0x3, 0x6, 0x9
+ };
+ static char lut1[0x10] = {
+ 0x4, 0x1, 0xA, 0x7, 0xE, 0x5, 0xE, 0x1,
+ 0xC, 0x9, 0x8, 0x5, 0x6, 0x3, 0xC, 0x9
+ };
+ char key, *lut;
+ int i, sgn, mag, mod;
+
+ for (key = 0xB, lut = lut0, i = 0; i < len; i++) {
+ rsp[i] = (key + 5 * chl[i]) & 0xF;
+ key = lut[(int) rsp[i]];
+ sgn = (rsp[i] >> 3) & 0x1;
+ mag = ((sgn == 1) ? ~rsp[i] : rsp[i]) & 0x7;
+ mod = (mag % 3 == 1) ? sgn : 1 - sgn;
+ if (lut == lut1 && (rsp[i] == 0x1 || rsp[i] == 0x9))
+ mod = 1;
+ if (lut == lut1 && (rsp[i] == 0xB || rsp[i] == 0xE))
+ mod = 0;
+ lut = (mod == 1) ? lut1 : lut0;
+ }
+}
+
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff