diff options
Diffstat (limited to 'src/NDSCart.cpp')
| -rw-r--r-- | src/NDSCart.cpp | 160 |
1 files changed, 101 insertions, 59 deletions
diff --git a/src/NDSCart.cpp b/src/NDSCart.cpp index 5a2a0d0..a5e0f41 100644 --- a/src/NDSCart.cpp +++ b/src/NDSCart.cpp @@ -19,10 +19,13 @@ #include <stdio.h> #include <string.h> #include "NDS.h" +#include "DSi.h" #include "NDSCart.h" #include "ARM.h" #include "CRC32.h" +#include "DSi_AES.h" #include "Platform.h" +#include "ROMList.h" namespace NDSCart_SRAM @@ -473,6 +476,7 @@ u32 CartROMSize; u32 CartCRC; u32 CartID; bool CartIsHomebrew; +bool CartIsDSi; u32 CmdEncMode; u32 DataEncMode; @@ -555,9 +559,13 @@ void Key1_ApplyKeycode(u32* keycode, u32 mod) } } -void Key1_InitKeycode(u32 idcode, u32 level, u32 mod) +void Key1_InitKeycode(bool dsi, u32 idcode, u32 level, u32 mod) { - memcpy(Key1_KeyBuf, &NDS::ARM7BIOS[0x30], 0x1048); // hax + // TODO: source the key data from different possible places + if (dsi && NDS::ConsoleType==1) + memcpy(Key1_KeyBuf, &DSi::ARM7iBIOS[0xC6D0], 0x1048); // hax + else + memcpy(Key1_KeyBuf, &NDS::ARM7BIOS[0x30], 0x1048); // hax u32 keycode[3] = {idcode, idcode>>1, idcode<<1}; if (level >= 1) Key1_ApplyKeycode(keycode, mod); @@ -592,6 +600,15 @@ void Key2_Encrypt(u8* data, u32 len) } +void ApplyModcrypt(u32 addr, u32 len, u8* iv) +{return; + u8 key[16]; + + DSi_AES::GetModcryptKey(&CartROM[0], key); + DSi_AES::ApplyModcrypt(&CartROM[addr], len, key, iv); +} + + bool Init() { if (!NDSCart_SRAM::Init()) return false; @@ -610,32 +627,19 @@ void DeInit() void Reset() { - SPICnt = 0; - ROMCnt = 0; - - memset(ROMCommand, 0, 8); - ROMDataOut = 0; - - Key2_X = 0; - Key2_Y = 0; - - memset(DataOut, 0, 0x4000); - DataOutPos = 0; - DataOutLen = 0; - CartInserted = false; if (CartROM) delete[] CartROM; CartROM = NULL; CartROMSize = 0; CartID = 0; CartIsHomebrew = false; + CartIsDSi = false; ROMCommandHandler = NULL; - CmdEncMode = 0; - DataEncMode = 0; - NDSCart_SRAM::Reset(); + + ResetCart(); } void DoSavestate(Savestate* file) @@ -808,34 +812,21 @@ void ApplyDLDIPatch() } -bool ReadROMParams(u32 gamecode, u32* params) +bool ReadROMParams(u32 gamecode, ROMListEntry* params) { - // format for romlist.bin: - // [gamecode] [ROM size] [save type] [reserved] - // list must be sorted by gamecode - - FILE* f = Platform::OpenDataFile("romlist.bin"); - if (!f) return false; - - fseek(f, 0, SEEK_END); - u32 len = (u32)ftell(f); - u32 maxlen = len; - len >>= 4; // 16 bytes per entry + u32 len = sizeof(ROMList) / sizeof(ROMListEntry); u32 offset = 0; u32 chk_size = len >> 1; for (;;) { u32 key = 0; - fseek(f, offset + (chk_size << 4), SEEK_SET); - fread(&key, 4, 1, f); - - printf("chk_size=%d, key=%08X, wanted=%08X, offset=%08X\n", chk_size, key, gamecode, offset); + ROMListEntry* curentry = &ROMList[offset + chk_size]; + key = curentry->GameCode; if (key == gamecode) { - fread(params, 4, 3, f); - fclose(f); + memcpy(params, curentry, sizeof(ROMListEntry)); return true; } else @@ -843,22 +834,20 @@ bool ReadROMParams(u32 gamecode, u32* params) if (key < gamecode) { if (chk_size == 0) - offset += 0x10; + offset++; else - offset += (chk_size << 4); + offset += chk_size; } else if (chk_size == 0) { - fclose(f); return false; } chk_size >>= 1; } - if (offset >= maxlen) + if (offset >= len) { - fclose(f); return false; } } @@ -867,15 +856,20 @@ bool ReadROMParams(u32 gamecode, u32* params) void DecryptSecureArea(u8* out) { + // TODO: source decryption data from different possible sources + // * original DS-mode ARM7 BIOS has the key data at 0x30 + // * .srl ROMs (VC dumps) have encrypted secure areas but have precomputed + // decryption data at 0x1000 (and at the beginning of the DSi region if any) + u32 gamecode = *(u32*)&CartROM[0x0C]; u32 arm9base = *(u32*)&CartROM[0x20]; memcpy(out, &CartROM[arm9base], 0x800); - Key1_InitKeycode(gamecode, 2, 2); + Key1_InitKeycode(false, gamecode, 2, 2); Key1_Decrypt((u32*)&out[0]); - Key1_InitKeycode(gamecode, 3, 2); + Key1_InitKeycode(false, gamecode, 3, 2); for (u32 i = 0; i < 0x800; i += 8) Key1_Decrypt((u32*)&out[i]); @@ -898,6 +892,7 @@ bool LoadROM(const char* path, const char* sram, bool direct) { // TODO: streaming mode? for really big ROMs or systems with limited RAM // for now we're lazy + // also TODO: validate what we're loading!! FILE* f = Platform::OpenFile(path, "rb"); if (!f) @@ -919,6 +914,11 @@ bool LoadROM(const char* path, const char* sram, bool direct) fread(&gamecode, 4, 1, f); printf("Game code: %c%c%c%c\n", gamecode&0xFF, (gamecode>>8)&0xFF, (gamecode>>16)&0xFF, gamecode>>24); + u8 unitcode; + fseek(f, 0x12, SEEK_SET); + fread(&unitcode, 1, 1, f); + CartIsDSi = (unitcode & 0x02) != 0; + CartROM = new u8[CartROMSize]; memset(CartROM, 0, CartROMSize); fseek(f, 0, SEEK_SET); @@ -930,22 +930,23 @@ bool LoadROM(const char* path, const char* sram, bool direct) CartCRC = CRC32(CartROM, CartROMSize); printf("ROM CRC32: %08X\n", CartCRC); - u32 romparams[3]; - if (!ReadROMParams(gamecode, romparams)) + ROMListEntry romparams; + if (!ReadROMParams(gamecode, &romparams)) { // set defaults printf("ROM entry not found\n"); - romparams[0] = CartROMSize; + romparams.GameCode = gamecode; + romparams.ROMSize = CartROMSize; if (*(u32*)&CartROM[0x20] < 0x4000) - romparams[1] = 0; // no saveRAM for homebrew + romparams.SaveMemType = 0; // no saveRAM for homebrew else - romparams[1] = 2; // assume EEPROM 64k (TODO FIXME) + romparams.SaveMemType = 2; // assume EEPROM 64k (TODO FIXME) } else - printf("ROM entry: %08X %08X %08X\n", romparams[0], romparams[1], romparams[2]); + printf("ROM entry: %08X %08X\n", romparams.ROMSize, romparams.SaveMemType); - if (romparams[0] != len) printf("!! bad ROM size %d (expected %d) rounded to %d\n", len, romparams[0], CartROMSize); + if (romparams.ROMSize != len) printf("!! bad ROM size %d (expected %d) rounded to %d\n", len, romparams.ROMSize, CartROMSize); // generate a ROM ID // note: most games don't check the actual value @@ -957,9 +958,12 @@ bool LoadROM(const char* path, const char* sram, bool direct) else CartID |= (0x100 - (CartROMSize >> 28)) << 8; - if (romparams[1] == 8) + if (romparams.SaveMemType == 8) CartID |= 0x08000000; // NAND flag + if (CartIsDSi) + CartID |= 0x40000000; + printf("Cart ID: %08X\n", CartID); u32 arm9base = *(u32*)&CartROM[0x20]; @@ -975,11 +979,11 @@ bool LoadROM(const char* path, const char* sram, bool direct) strncpy((char*)&CartROM[arm9base], "encryObj", 8); - Key1_InitKeycode(gamecode, 3, 2); + Key1_InitKeycode(false, gamecode, 3, 2); for (u32 i = 0; i < 0x800; i += 8) Key1_Encrypt((u32*)&CartROM[arm9base + i]); - Key1_InitKeycode(gamecode, 2, 2); + Key1_InitKeycode(false, gamecode, 2, 2); Key1_Encrypt((u32*)&CartROM[arm9base]); } } @@ -1007,12 +1011,11 @@ bool LoadROM(const char* path, const char* sram, bool direct) ROMCommandHandler = ROMCommand_Retail; // encryption - Key1_InitKeycode(gamecode, 2, 2); - + Key1_InitKeycode(false, gamecode, 2, 2); // save printf("Save file: %s\n", sram); - NDSCart_SRAM::LoadSave(sram, romparams[1]); + NDSCart_SRAM::LoadSave(sram, romparams.SaveMemType); return true; } @@ -1023,6 +1026,27 @@ void RelocateSave(const char* path, bool write) NDSCart_SRAM::RelocateSave(path, write); } +void ResetCart() +{ + // CHECKME: what if there is a transfer in progress? + + SPICnt = 0; + ROMCnt = 0; + + memset(ROMCommand, 0, 8); + ROMDataOut = 0; + + Key2_X = 0; + Key2_Y = 0; + + memset(DataOut, 0, 0x4000); + DataOutPos = 0; + DataOutLen = 0; + + CmdEncMode = 0; + DataEncMode = 0; +} + void ReadROM(u32 addr, u32 len, u32 offset) { if (!CartInserted) return; @@ -1197,7 +1221,7 @@ void WriteROMCnt(u32 val) // handle KEY1 encryption as needed. // KEY2 encryption is implemented in hardware and doesn't need to be handled. u8 cmd[8]; - if (CmdEncMode == 1) + if (CmdEncMode == 1 || CmdEncMode == 11) { *(u32*)&cmd[0] = ByteSwap(*(u32*)&ROMCommand[4]); *(u32*)&cmd[4] = ByteSwap(*(u32*)&ROMCommand[0]); @@ -1243,11 +1267,23 @@ void WriteROMCnt(u32 val) break; case 0x3C: - if (CartInserted) CmdEncMode = 1; + if (CartInserted) + { + CmdEncMode = 1; + Key1_InitKeycode(false, *(u32*)&CartROM[0xC], 2, 2); + } + break; + + case 0x3D: + if (CartInserted && CartIsDSi) + { + CmdEncMode = 11; + Key1_InitKeycode(true, *(u32*)&CartROM[0xC], 1, 2); + } break; default: - if (CmdEncMode == 1) + if (CmdEncMode == 1 || CmdEncMode == 11) { switch (cmd[0] & 0xF0) { @@ -1263,6 +1299,12 @@ void WriteROMCnt(u32 val) case 0x20: { u32 addr = (cmd[2] & 0xF0) << 8; + if (CmdEncMode == 11) + { + u32 arm9i_base = *(u32*)&CartROM[0x1C0]; + addr -= 0x4000; + addr += arm9i_base; + } ReadROM(addr, 0x1000, 0); } break; |