302 lines
8.6 KiB
C
302 lines
8.6 KiB
C
#include <3ds.h>
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#include <string.h>
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#include "patcher.h"
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#include "ifile.h"
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#ifndef PATH_MAX
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#define PATH_MAX 255
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#define CONFIG(a) ((config >> (a + 16)) & 1)
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#define MULTICONFIG(a) ((config >> (a * 2 + 6)) & 3)
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#define BOOTCONFIG(a, b) ((config >> a) & b)
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#endif
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static u32 config = 0;
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static u8 secureinfo[0x111] = {0};
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//Quick Search algorithm, adapted from http://igm.univ-mlv.fr/~lecroq/string/node19.html#SECTION00190
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static u8 *memsearch(u8 *startPos, const void *pattern, u32 size, u32 patternSize)
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{
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const u8 *patternc = (const u8 *)pattern;
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//Preprocessing
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u32 table[256];
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for(u32 i = 0; i < 256; ++i)
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table[i] = patternSize + 1;
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for(u32 i = 0; i < patternSize; ++i)
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table[patternc[i]] = patternSize - i;
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//Searching
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u32 j = 0;
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while(j <= size - patternSize)
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{
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if(memcmp(patternc, startPos + j, patternSize) == 0)
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return startPos + j;
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j += table[startPos[j + patternSize]];
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}
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return NULL;
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}
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static u32 patchMemory(u8 *start, u32 size, const void *pattern, u32 patSize, int offset, const void *replace, u32 repSize, u32 count)
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{
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u32 i;
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for(i = 0; i < count; i++)
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{
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u8 *found = memsearch(start, pattern, size, patSize);
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if(found == NULL) break;
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memcpy(found + offset, replace, repSize);
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u32 at = (u32)(found - start);
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if(at + patSize > size) break;
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size -= at + patSize;
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start = found + patSize;
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}
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return i;
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}
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static int fileOpen(IFile *file, FS_ArchiveID id, const char *path, int flags)
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{
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FS_Archive archive;
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FS_Path ppath;
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size_t len = strnlen(path, PATH_MAX);
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archive.id = id;
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archive.lowPath.type = PATH_EMPTY;
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archive.lowPath.size = 1;
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archive.lowPath.data = (u8 *)"";
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ppath.type = PATH_ASCII;
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ppath.data = path;
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ppath.size = len + 1;
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return IFile_Open(file, archive, ppath, flags);
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}
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static int loadSecureinfo()
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{
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IFile file;
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Result ret;
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u64 total;
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if(secureinfo[0] == 0xFF)
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return 0;
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ret = fileOpen(&file, ARCHIVE_NAND_RW, "/sys/SecureInfo_C", FS_OPEN_READ);
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if(R_SUCCEEDED(ret))
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{
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ret = IFile_Read(&file, &total, secureinfo, sizeof(secureinfo));
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IFile_Close(&file);
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if(R_SUCCEEDED(ret) && total == sizeof(secureinfo))
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secureinfo[0] = 0xFF;
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}
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return ret;
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}
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static int loadConfig()
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{
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IFile file;
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Result ret;
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u64 total;
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if(config)
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return 0;
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ret = fileOpen(&file, ARCHIVE_SDMC, "/aurei/config.bin", FS_OPEN_READ);
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if(R_SUCCEEDED(ret))
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{
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ret = IFile_Read(&file, &total, &config, 3);
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IFile_Close(&file);
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if(R_SUCCEEDED(ret)) config |= 1 << 24;
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}
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return ret;
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}
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void patchCode(u64 progId, u8 *code, u32 size)
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{
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switch(progId)
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{
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case 0x0004003000008F02LL: // USA Menu
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case 0x0004003000008202LL: // EUR Menu
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case 0x0004003000009802LL: // JPN Menu
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case 0x000400300000A102LL: // CHN Menu
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case 0x000400300000A902LL: // KOR Menu
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case 0x000400300000B102LL: // TWN Menu
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{
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static const u8 regionFreePattern[] = {
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0x00, 0x00, 0x55, 0xE3, 0x01, 0x10, 0xA0, 0xE3
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};
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static const u8 regionFreePatch[] = {
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0x01, 0x00, 0xA0, 0xE3, 0x1E, 0xFF, 0x2F, 0xE1
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};
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//Patch SMDH region checks
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patchMemory(code, size,
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regionFreePattern,
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sizeof(regionFreePattern), -16,
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regionFreePatch,
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sizeof(regionFreePatch), 1
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);
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break;
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}
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case 0x0004013000002C02LL: // NIM
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{
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static const u8 blockAutoUpdatesPattern[] = {
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0x25, 0x79, 0x0B, 0x99
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};
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static const u8 blockAutoUpdatesPatch[] = {
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0xE3, 0xA0
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};
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static const u8 skipEshopUpdateCheckPattern[] = {
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0x30, 0xB5, 0xF1, 0xB0
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};
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static const u8 skipEshopUpdateCheckPatch[] = {
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0x00, 0x20, 0x08, 0x60, 0x70, 0x47
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};
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//Block silent auto-updates
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patchMemory(code, size,
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blockAutoUpdatesPattern,
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sizeof(blockAutoUpdatesPattern), 0,
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blockAutoUpdatesPatch,
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sizeof(blockAutoUpdatesPatch), 1
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);
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//Skip update checks to access the EShop
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patchMemory(code, size,
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skipEshopUpdateCheckPattern,
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sizeof(skipEshopUpdateCheckPattern), 0,
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skipEshopUpdateCheckPatch,
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sizeof(skipEshopUpdateCheckPatch), 1
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);
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break;
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}
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case 0x0004013000003202LL: // FRIENDS
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{
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static const u8 fpdVerPattern[] = {
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0xE0, 0x1E, 0xFF, 0x2F, 0xE1, 0x01, 0x01, 0x01
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};
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u8 *fdpVer = memsearch(code, fpdVerPattern, size, sizeof(fpdVerPattern));
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if(fdpVer != NULL)
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{
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fdpVer += sizeof(fpdVerPattern) + 1;
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//Allow online access to work with old friends modules
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if(*fdpVer < 5) *fdpVer = 5;
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}
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break;
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}
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case 0x0004001000021000LL: // USA MSET
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case 0x0004001000020000LL: // JPN MSET
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case 0x0004001000022000LL: // EUR MSET
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case 0x0004001000026000LL: // CHN MSET
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case 0x0004001000027000LL: // KOR MSET
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case 0x0004001000028000LL: // TWN MSET
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{
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if(R_SUCCEEDED(loadConfig()) && CONFIG(6))
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{
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static const u16 verPattern[] = u"Ver.";
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const u32 currentNand = BOOTCONFIG(0, 3);
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const u32 matchingFirm = BOOTCONFIG(2, 1) == (currentNand != 0);
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//Patch Ver. string
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patchMemory(code, size,
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verPattern,
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sizeof(verPattern) - sizeof(u16), 0,
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!currentNand ? ((matchingFirm) ? u" Sys" : u"SysA") :
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((currentNand == 1) ? (matchingFirm ? u" Emu" : u"EmuA") : ((matchingFirm) ? u"Emu2" : u"Em2A")),
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sizeof(verPattern) - sizeof(u16), 1
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);
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}
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break;
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}
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case 0x0004013000008002LL: // NS
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{
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static const u8 stopCartUpdatesPattern[] = {
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0x0C, 0x18, 0xE1, 0xD8
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};
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static const u8 stopCartUpdatesPatch[] = {
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0x0B, 0x18, 0x21, 0xC8
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};
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//Disable updates from foreign carts (makes carts region-free)
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patchMemory(code, size,
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stopCartUpdatesPattern,
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sizeof(stopCartUpdatesPattern), 0,
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stopCartUpdatesPatch,
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sizeof(stopCartUpdatesPatch), 2
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);
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if(R_SUCCEEDED(loadConfig()) && MULTICONFIG(1))
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{
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static const u8 cfgN3dsCpuPattern[] = {
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0x40, 0xA0, 0xE1, 0x07, 0x00
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};
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u8 *cfgN3dsCpuLoc = memsearch(code, cfgN3dsCpuPattern, size, sizeof(cfgN3dsCpuPattern));
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//Patch N3DS CPU Clock and L2 cache setting
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if(cfgN3dsCpuLoc != NULL)
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{
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*(u32 *)(cfgN3dsCpuLoc + 3) = 0xE1A00000;
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*(u32 *)(cfgN3dsCpuLoc + 0x1F) = 0xE3A00000 + MULTICONFIG(1);
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}
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}
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break;
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}
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case 0x0004013000001702LL: // CFG
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{
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static const u8 secureinfoSigCheckPattern[] = {
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0x06, 0x46, 0x10, 0x48, 0xFC
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};
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static const u8 secureinfoSigCheckPatch[] = {
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0x00, 0x26
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};
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//Disable SecureInfo signature check
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patchMemory(code, size,
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secureinfoSigCheckPattern,
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sizeof(secureinfoSigCheckPattern), 0,
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secureinfoSigCheckPatch,
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sizeof(secureinfoSigCheckPatch), 1
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);
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if(R_SUCCEEDED(loadSecureinfo()))
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{
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static const u16 secureinfoFilenamePattern[] = u"SecureInfo_";
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static const u16 secureinfoFilenamePatch[] = u"C";
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//Use SecureInfo_C
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patchMemory(code, size,
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secureinfoFilenamePattern,
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sizeof(secureinfoFilenamePattern) - sizeof(u16),
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sizeof(secureinfoFilenamePattern) - sizeof(u16),
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secureinfoFilenamePatch,
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sizeof(secureinfoFilenamePatch) - sizeof(u16), 2
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);
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}
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break;
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}
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}
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} |