mirror of
https://github.com/ApacheThunder/NTR_Launcher.git
synced 2025-06-18 19:15:40 -04:00
1e2dfed554
This is the version 1.9.6 build rebased from Chishm's official github of NitroHax which is the project this is based off of.
296 lines
9.3 KiB
C
Executable File
296 lines
9.3 KiB
C
Executable File
/*
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NitroHax -- Cheat tool for the Nintendo DS
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Copyright (C) 2008 Michael "Chishm" Chisholm
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "read_card.h"
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#include <nds.h>
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#include <nds/arm9/cache.h>
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#include <nds/dma.h>
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#include <nds/card.h>
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#include <string.h>
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#include "encryption.h"
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#include "common.h"
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static u32 portFlags = 0;
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static u32 secureAreaData[CARD_SECURE_AREA_SIZE/sizeof(u32)];
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static const u8 cardSeedBytes[] = {0xE8, 0x4D, 0x5A, 0xB1, 0x17, 0x8F, 0x99, 0xD5};
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static u32 getRandomNumber(void) {
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return 4; // chosen by fair dice roll.
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// guaranteed to be random.
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}
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static void decryptSecureArea (u32 gameCode, u32* secureArea)
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{
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int i;
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init_keycode (gameCode, 2, 8);
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crypt_64bit_down (secureArea);
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init_keycode (gameCode, 3, 8);
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for (i = 0; i < 0x200; i+= 2) {
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crypt_64bit_down (secureArea + i);
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}
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}
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static struct {
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unsigned int iii;
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unsigned int jjj;
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unsigned int kkkkk;
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unsigned int llll;
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unsigned int mmm;
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unsigned int nnn;
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} key1data;
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static void initKey1Encryption (u8* cmdData) {
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key1data.iii = getRandomNumber() & 0x00000fff;
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key1data.jjj = getRandomNumber() & 0x00000fff;
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key1data.kkkkk = getRandomNumber() & 0x000fffff;
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key1data.llll = getRandomNumber() & 0x0000ffff;
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key1data.mmm = getRandomNumber() & 0x00000fff;
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key1data.nnn = getRandomNumber() & 0x00000fff;
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cmdData[7] = CARD_CMD_ACTIVATE_BF;
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cmdData[6] = (u8) (key1data.iii >> 4);
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cmdData[5] = (u8) ((key1data.iii << 4) | (key1data.jjj >> 8));
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cmdData[4] = (u8) key1data.jjj;
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cmdData[3] = (u8) (key1data.kkkkk >> 16);
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cmdData[2] = (u8) (key1data.kkkkk >> 8);
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cmdData[1] = (u8) key1data.kkkkk;
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cmdData[0] = (u8) getRandomNumber();
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}
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// Note: cmdData must be aligned on a word boundary
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static void createEncryptedCommand (u8 command, u8* cmdData, u32 block)
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{
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unsigned long iii, jjj;
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if (command != CARD_CMD_SECURE_READ) {
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block = key1data.llll;
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}
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if (command == CARD_CMD_ACTIVATE_SEC) {
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iii = key1data.mmm;
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jjj = key1data.nnn;
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} else {
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iii = key1data.iii;
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jjj = key1data.jjj;
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}
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cmdData[7] = (u8) (command | (block >> 12));
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cmdData[6] = (u8) (block >> 4);
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cmdData[5] = (u8) ((block << 4) | (iii >> 8));
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cmdData[4] = (u8) iii;
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cmdData[3] = (u8) (jjj >> 4);
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cmdData[2] = (u8) ((jjj << 4) | (key1data.kkkkk >> 16));
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cmdData[1] = (u8) (key1data.kkkkk >> 8);
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cmdData[0] = (u8) key1data.kkkkk;
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crypt_64bit_up ((u32*)cmdData);
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key1data.kkkkk += 1;
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}
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static void cardDelay (u16 readTimeout) {
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/* Using a while loop to check the timeout,
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so we have to wait until one before overflow.
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This also requires an extra 1 for the timer data.
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See GBATek for the normal formula used for card timeout.
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*/
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TIMER_DATA(0) = 0 - (((readTimeout & 0x3FFF) + 3));
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TIMER_CR(0) = TIMER_DIV_256 | TIMER_ENABLE;
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while (TIMER_DATA(0) != 0xFFFF);
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// Clear out the timer registers
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TIMER_CR(0) = 0;
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TIMER_DATA(0) = 0;
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}
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int cardInit (tNDSHeader* ndsHeader, u32* chipID)
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{
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u32 portFlagsKey1, portFlagsSecRead;
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bool normalChip; // As defined by GBAtek, normal chip secure area is accessed in blocks of 0x200, other chip in blocks of 0x1000
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u32* secureArea;
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int secureBlockNumber;
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int i;
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u8 cmdData[8] __attribute__ ((aligned));
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// Dummy command sent after card reset
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cardParamCommand (CARD_CMD_DUMMY, 0,
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CARD_ACTIVATE | CARD_nRESET | CARD_CLK_SLOW | CARD_BLK_SIZE(1) | CARD_DELAY1(0x1FFF) | CARD_DELAY2(0x3F),
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NULL, 0);
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// Read the header
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cardParamCommand (CARD_CMD_HEADER_READ, 0,
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CARD_ACTIVATE | CARD_nRESET | CARD_CLK_SLOW | CARD_BLK_SIZE(1) | CARD_DELAY1(0x1FFF) | CARD_DELAY2(0x3F),
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(uint32*)ndsHeader, sizeof(tNDSHeader));
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// Check header CRC
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if (ndsHeader->headerCRC16 != swiCRC16(0xFFFF, ndsHeader, 0x15E)) {
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return ERR_HEAD_CRC;
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}
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// Check logo CRC
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/*
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if (ndsHeader->logoCRC16 != 0xCF56) {
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return ERR_LOGO_CRC;
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}
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*/
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// Initialise blowfish encryption for KEY1 commands and decrypting the secure area
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init_keycode (*((u32*)&ndsHeader->gameCode), 2, 8);
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// Port 40001A4h setting for normal reads (command B7)
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portFlags = ndsHeader->cardControl13 & ~CARD_BLK_SIZE(7);
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// Port 40001A4h setting for KEY1 commands (usually 001808F8h)
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portFlagsKey1 = CARD_ACTIVATE | CARD_nRESET | (ndsHeader->cardControl13 & (CARD_WR|CARD_CLK_SLOW)) |
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((ndsHeader->cardControlBF & (CARD_CLK_SLOW|CARD_DELAY1(0x1FFF))) + ((ndsHeader->cardControlBF & CARD_DELAY2(0x3F)) >> 16));
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// 1st Get ROM Chip ID
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cardParamCommand (CARD_CMD_HEADER_CHIPID, 0,
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(ndsHeader->cardControl13 & (CARD_WR|CARD_nRESET|CARD_CLK_SLOW)) | CARD_ACTIVATE | CARD_BLK_SIZE(7),
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chipID, sizeof(u32));
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// Adjust card transfer method depending on the most significant bit of the chip ID
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normalChip = ((*chipID) & 0x80000000) != 0; // ROM chip ID MSB
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if (!normalChip) {
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portFlagsKey1 |= CARD_SEC_LARGE;
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}
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// 3Ciiijjj xkkkkkxx - Activate KEY1 Encryption Mode
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initKey1Encryption (cmdData);
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cardPolledTransfer((ndsHeader->cardControl13 & (CARD_WR|CARD_nRESET|CARD_CLK_SLOW)) | CARD_ACTIVATE, NULL, 0, cmdData);
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// 4llllmmm nnnkkkkk - Activate KEY2 Encryption Mode
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createEncryptedCommand (CARD_CMD_ACTIVATE_SEC, cmdData, 0);
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if (normalChip) {
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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cardDelay(ndsHeader->readTimeout);
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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} else {
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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}
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// Set the KEY2 encryption registers
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REG_ROMCTRL = 0;
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CARD_1B0 = cardSeedBytes[ndsHeader->deviceType & 0x07] | (key1data.nnn << 15) | (key1data.mmm << 27) | 0x6000;
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CARD_1B4 = 0x879b9b05;
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CARD_1B8 = key1data.mmm >> 5;
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CARD_1BA = 0x5c;
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REG_ROMCTRL = CARD_nRESET | CARD_SEC_SEED | CARD_SEC_EN | CARD_SEC_DAT;
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// Update the DS card flags to suit KEY2 encryption
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portFlagsKey1 |= CARD_SEC_EN | CARD_SEC_DAT;
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// 1lllliii jjjkkkkk - 2nd Get ROM Chip ID / Get KEY2 Stream
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createEncryptedCommand (CARD_CMD_SECURE_CHIPID, cmdData, 0);
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if (normalChip) {
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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cardDelay(ndsHeader->readTimeout);
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cardPolledTransfer(portFlagsKey1 | CARD_BLK_SIZE(7), NULL, 0, cmdData);
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} else {
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cardPolledTransfer(portFlagsKey1 | CARD_BLK_SIZE(7), NULL, 0, cmdData);
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}
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// 2bbbbiii jjjkkkkk - Get Secure Area Block
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secureArea = secureAreaData;
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portFlagsSecRead = (ndsHeader->cardControlBF & (CARD_CLK_SLOW|CARD_DELAY1(0x1FFF)|CARD_DELAY2(0x3F)))
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| CARD_ACTIVATE | CARD_nRESET | CARD_SEC_EN | CARD_SEC_DAT;
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for (secureBlockNumber = 4; secureBlockNumber < 8; secureBlockNumber++) {
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createEncryptedCommand (CARD_CMD_SECURE_READ, cmdData, secureBlockNumber);
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if (normalChip) {
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cardPolledTransfer(portFlagsSecRead, NULL, 0, cmdData);
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cardDelay(ndsHeader->readTimeout);
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for (i = 8; i > 0; i--) {
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cardPolledTransfer(portFlagsSecRead | CARD_BLK_SIZE(1), secureArea, 0x200, cmdData);
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secureArea += 0x200/sizeof(u32);
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}
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} else {
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cardPolledTransfer(portFlagsSecRead | CARD_BLK_SIZE(4) | CARD_SEC_LARGE, secureArea, 0x1000, cmdData);
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secureArea += 0x1000/sizeof(u32);
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}
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}
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// Alllliii jjjkkkkk - Enter Main Data Mode
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createEncryptedCommand (CARD_CMD_DATA_MODE, cmdData, 0);
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if (normalChip) {
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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cardDelay(ndsHeader->readTimeout);
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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} else {
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cardPolledTransfer(portFlagsKey1, NULL, 0, cmdData);
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}
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// Now deal with secure area decryption and verification
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decryptSecureArea (*((u32*)&ndsHeader->gameCode), secureAreaData);
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secureArea = secureAreaData;
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if (secureArea[0] == 0x72636e65 /*'encr'*/ && secureArea[1] == 0x6a624f79 /*'yObj'*/) {
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// Secure area exists, so just clear the tag
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secureArea[0] = 0xe7ffdeff;
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secureArea[1] = 0xe7ffdeff;
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} else {
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// Secure area tag is not there, so destroy the entire secure area
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for (i = 0; i < 0x200; i ++) {
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*secureArea++ = 0xe7ffdeff;
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}
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// Disabled error checks on secure area. This was able to boot a DS-Xtreme. May increase flashcart compatiblity drastically.
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// return normalChip ? ERR_SEC_NORM : ERR_SEC_OTHR;
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return normalChip ? ERR_NONE : ERR_NONE;
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}
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return ERR_NONE;
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}
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void cardRead (u32 src, u32* dest, size_t size)
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{
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size_t readSize;
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if (src < CARD_SECURE_AREA_OFFSET) {
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return;
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} else if (src < CARD_DATA_OFFSET) {
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// Read data from secure area
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readSize = src + size < CARD_DATA_OFFSET ? size : CARD_DATA_OFFSET - src;
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memcpy (dest, (u8*)secureAreaData + src - CARD_SECURE_AREA_OFFSET, readSize);
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src += readSize;
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dest += readSize/sizeof(*dest);
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size -= readSize;
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}
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while (size > 0) {
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readSize = size < CARD_DATA_BLOCK_SIZE ? size : CARD_DATA_BLOCK_SIZE;
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cardParamCommand (CARD_CMD_DATA_READ, src,
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(portFlags &~CARD_BLK_SIZE(7)) | CARD_ACTIVATE | CARD_nRESET | CARD_BLK_SIZE(1),
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dest, readSize);
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src += readSize;
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dest += readSize/sizeof(*dest);
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size -= readSize;
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}
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}
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