274 lines
8.6 KiB
C
274 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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#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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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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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 patch_memory(u8 *start, u32 size, const void *pattern, u32 patsize, int offset, const void *replace, u32 repsize, u32 count){
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u32 i;
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for(i = 0; i < count; i++){
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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 file_open(IFile *file, FS_ArchiveID id, const char *path, int flags){
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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 load_secureinfo(){
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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 = file_open(&file, ARCHIVE_NAND_RW, "/sys/SecureInfo_C", FS_OPEN_READ);
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if(R_SUCCEEDED(ret)){
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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 load_config(){
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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 = file_open(&file, ARCHIVE_SDMC, "/aurei/config.bin", FS_OPEN_READ);
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if(R_SUCCEEDED(ret)){
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ret = IFile_Read(&file, &total, (void *)&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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u32 patch_code(u64 progid, u8 *code, u32 size){
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switch(progid){
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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_memory(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 blockEShopUpdateCheckPattern[] = {
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0x30, 0xB5, 0xF1, 0xB0
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};
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static const u8 blockEShopUpdateCheckPatch[] = {
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0x00, 0x20, 0x08, 0x60, 0x70, 0x47
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};
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static const u8 countryRespPattern[] = {
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0x01, 0x20, 0x01, 0x90, 0x22, 0x46, 0x06, 0x9B
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};
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static const char countryRespPatchModel[] = {
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0x06, 0x9A, 0x03, 0x20, 0x90, 0x47, 0x55, 0x21, 0x01, 0x70, 0x53, 0x21, 0x41, 0x70, 0x00, 0x21,
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0x81, 0x70, 0x60, 0x61, 0x00, 0x20
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};
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const char *country;
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char countryRespPatch[sizeof(countryRespPatchModel)];
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patch_memory(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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patch_memory(code, size,
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blockEShopUpdateCheckPattern,
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sizeof(blockEShopUpdateCheckPattern), 0,
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blockEShopUpdateCheckPatch,
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sizeof(blockEShopUpdateCheckPatch), 1
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);
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if(R_SUCCEEDED(load_secureinfo())){
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switch(secureinfo[0x100]){
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case 1: country = "US"; break;
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case 2: country = "GB"; break; // sorry rest-of-Europe, you have to change this
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case 3: country = "AU"; break;
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case 4: country = "CN"; break;
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case 5: country = "KR"; break;
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case 6: country = "TW"; break;
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default: case 0: country = "JP"; break;
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}
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// patch XML response Country
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memcpy(countryRespPatch,
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countryRespPatchModel,
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sizeof(countryRespPatchModel)
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);
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countryRespPatch[6] = country[0];
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countryRespPatch[10] = country[1];
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patch_memory(code, size,
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countryRespPattern,
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sizeof(countryRespPattern), 0,
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countryRespPatch,
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sizeof(countryRespPatch), 1
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);
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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(load_config()) && ((config >> 5) & 0x1)){
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static const u16 verPattern[] = u"Ver.";
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const u32 currentFirm = ((config >> 12) & 0x1);
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const u32 currentNand = ((config >> 13) & 0x3);
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patch_memory(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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patch_memory(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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static const u16 secureinfoFilenamePattern[] = u"SecureInfo_";
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static const u16 secureinfoFilenamePatch[] = u"C";
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// disable SecureInfo signature check
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patch_memory(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(load_secureinfo())){
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// use SecureInfo_C
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patch_memory(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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return 0;
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}
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