311 lines
8.7 KiB
C
311 lines
8.7 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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#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)
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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) size = 0;
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else size = 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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}
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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, 0x01
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};
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u8 *fdpver = memsearch(code, fpdverPattern, size, sizeof(fpdverPattern));
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if(fdpver == NULL) break;
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else fdpver += sizeof(fpdverPattern);
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if(*fdpver < 5) *fdpver = 5;
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break;
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}
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case 0x0004003000008A02LL: // ErrDisp
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{
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static const u8 unitinfoCheckPattern1[] = {
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0x14, 0x00, 0xD0, 0xE5, 0xDB, 0x9A, 0x9F, 0xED
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};
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static const u8 unitinfoCheckPattern2[] = {
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0x14, 0x00, 0xD0, 0xE5, 0x01, 0x00, 0x10, 0xE3
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} ;
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static const u8 unitinfoCheckPatch[] = {
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0x00, 0x00, 0xA0, 0xE3
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} ;
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patchMemory(code, size,
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unitinfoCheckPattern1,
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sizeof(unitinfoCheckPattern1), 0,
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unitinfoCheckPatch,
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sizeof(unitinfoCheckPatch), 1
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);
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patchMemory(code, size,
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unitinfoCheckPattern2,
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sizeof(unitinfoCheckPattern2), 0,
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unitinfoCheckPatch,
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sizeof(unitinfoCheckPatch), 3
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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 >> 5) & 1))
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{
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static const u16 verPattern[] = u"Ver.";
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const u32 currentFirm = ((config >> 12) & 1);
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const u32 currentNand = ((config >> 13) & 3);
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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 ? ((currentNand == 1) ? ((currentFirm == 1) ? u" Emu" : u"Emu9") : u"Emu2") :
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((currentFirm == 1) ? u" Sys" : u"Sys9"),
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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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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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} |