X-Git-Url: https://sfsrealm.hopto.org/projects/gitweb.cgi?p=SFmpqapi.git;a=blobdiff_plain;f=SFmpqapi.cpp;fp=SFmpqapi.cpp;h=a0d5a13991c63c51249f1cdce8d5c5afd5eba114;hp=717ca025f0a985a5a60de44a2042ec96d4b40394;hb=7214af3eb69acdaef221c1846157ed07438bd0c1;hpb=1c63ef2a5d9f881e1006c4c674a81cebd9596c5e diff --git a/SFmpqapi.cpp b/SFmpqapi.cpp index 717ca02..a0d5a13 100644 --- a/SFmpqapi.cpp +++ b/SFmpqapi.cpp @@ -13,7 +13,11 @@ #include "../SComp/SComp.h" +#include "MpqCrypt.h" +#include "MpqHashTable.h" +#include "MpqBlockTable.h" #include "SFmpqapi.h" +#include "SFUtil.h" #include "SFTypes.h" struct SFMPQAPIMODULE { @@ -88,15 +92,6 @@ LCID availLocales[7] = {0x0000,0x0407,0x0409,0x040A,0x040C,0x0410,0x0416}; #define MAX_MPQ_PATH 260; -#define HASH_POSITION 0 -#define HASH_NAME_A 1 -#define HASH_NAME_B 2 -#define HASH_KEY 3 - -BOOL bCryptTableInit = FALSE; -DWORD dwCryptTable[0x500]; -DWORD dwHashTableKey; -DWORD dwBlockTableKey; MPQARCHIVE **lpOpenMpq = 0; DWORD dwOpenMpqCount = 0; MPQARCHIVE * FirstLastMpq[2] = {0,0}; @@ -117,9 +112,6 @@ funcSCompDecompress stormSCompDecompress = 0; void LoadStorm(); void FreeStorm(); -LPVOID WINAPI SFAlloc(DWORD dwSize); -void WINAPI SFFree(LPVOID lpvMemory); -void WINAPI SFMemZero(LPVOID lpvDestination, DWORD dwLength); BOOL WINAPI MpqOpenArchiveEx(LPCSTR lpFileName, DWORD dwPriority, DWORD dwFlags, MPQHANDLE *hMPQ, DWORD dwFlags2, DWORD dwMaximumFilesInArchive, DWORD dwBlockSize); DWORD WINAPI FindMpqHeaderAtLocation(HANDLE hFile, DWORD dwStart, DWORD dwLength); DWORD GetFullPath(LPCSTR lpFileName, char *lpBuffer, DWORD dwBufferLength); @@ -131,13 +123,6 @@ void SortOpenArchivesByPriority(); DWORD GetHandleType(MPQHANDLE hFile); BOOL AddToInternalListing(MPQHANDLE hMPQ, LPCSTR lpFileName); BOOL RemoveFromInternalListing(MPQHANDLE hMPQ, LPCSTR lpFileName); -size_t strlnlen(const char *strline); -char *nextline(const char *strline); -BOOL InitCryptTable(); -DWORD HashString(LPCSTR lpszString, DWORD dwHashType); -BOOL EncryptData(LPBYTE lpbyBuffer, DWORD dwLength, DWORD dwKey); -BOOL DecryptData(LPBYTE lpbyBuffer, DWORD dwLength, DWORD dwKey); -static DWORD DetectFileSeed(DWORD * block, DWORD decrypted, DWORD blocksize); DWORD DetectFileSeedEx(MPQARCHIVE * mpqOpenArc, HASHTABLEENTRY * lpHashEntry, LPCSTR * lplpFileName); BOOL APIENTRY DllMain( HINSTANCE hInstDLL, @@ -204,70 +189,6 @@ BOOL APIENTRY DllMain( HINSTANCE hInstDLL, return TRUE; } -LPVOID WINAPI SFAlloc(DWORD dwSize) -{ - LPVOID lpMemory = malloc(dwSize); - if (lpMemory) SFMemZero(lpMemory,dwSize); - return lpMemory; -} - -void WINAPI SFFree(LPVOID lpvMemory) -{ - if (lpvMemory) free(lpvMemory); -} - -void WINAPI SFMemZero(LPVOID lpvDestination, DWORD dwLength) -{ - DWORD dwPrevLen = dwLength; - LPDWORD lpdwDestination = (LPDWORD)lpvDestination; - LPBYTE lpbyDestination; - - dwLength >>= 2; - - while (dwLength--) - *lpdwDestination++ = 0; - - lpbyDestination = (LPBYTE)lpdwDestination; - - dwLength = dwPrevLen; - dwLength &= 3; - - while (dwLength--) - *lpbyDestination++ = 0; -} - -Int64 SFGetFileSize(HANDLE hFile) -{ - IntConv FileSize; - - FileSize.ui64 = 0; - - FileSize.ui32[0] = ::GetFileSize(hFile, &FileSize.ui32[1]); - - if (FileSize.ui32[0] == INVALID_FILE_SIZE) { - if (::GetLastError() != NO_ERROR) - return -1; - } - - return FileSize.i64; -} - -Int64 SFSetFilePointer(HANDLE hFile, Int64 nDistance, UInt32 dwMoveMethod) -{ - IntConv FilePos; - - FilePos.i64 = nDistance; - - FilePos.i32[0] = ::SetFilePointer(hFile, FilePos.i32[0], &FilePos.i32[1], dwMoveMethod); - - if (FilePos.i32[0] == INVALID_SET_FILE_POINTER) { - if (::GetLastError() != NO_ERROR) - return -1; - } - - return FilePos.i64; -} - TempAlloc::TempAlloc() { lpAllocAddress = 0; @@ -2105,34 +2026,8 @@ BOOL SFMPQAPI WINAPI MpqAddFileToArchiveEx(MPQHANDLE hMPQ, LPCSTR lpSourceFileNa SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+dwFileOffset,FILE_BEGIN); WriteFile(mpqOpenArc->hFile,buffer,fsz,&tsz,0); SFFree(buffer); - buffer = (char *)SFAlloc(sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - if (buffer) { - memcpy(buffer,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - EncryptData((LPBYTE)buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - } - buffer = (char *)SFAlloc(sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize); - if (buffer) { - memcpy(buffer,mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize); - EncryptData((LPBYTE)buffer,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwBlockTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwBlockTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - } + WriteHashTable(mpqOpenArc); + WriteBlockTable(mpqOpenArc); AddToInternalListing(hMPQ,lpDestFileName); return TRUE; @@ -2451,34 +2346,8 @@ BOOL SFMPQAPI WINAPI MpqAddFileFromBufferEx(MPQHANDLE hMPQ, LPVOID lpBuffer, DWO SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+dwFileOffset,FILE_BEGIN); WriteFile(mpqOpenArc->hFile,buffer,fsz,&tsz,0); SFFree(buffer); - buffer = (char *)SFAlloc(sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - if (buffer!=0) { - memcpy(buffer,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - EncryptData((LPBYTE)buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - } - buffer = (char *)SFAlloc(sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize); - if (buffer!=0) { - memcpy(buffer,mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize); - EncryptData((LPBYTE)buffer,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwBlockTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwBlockTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpBlockTable,sizeof(BLOCKTABLEENTRY) * mpqOpenArc->MpqHeader.dwBlockTableSize,dwBlockTableKey); - } + WriteHashTable(mpqOpenArc); + WriteBlockTable(mpqOpenArc); AddToInternalListing(hMPQ,lpFileName); return TRUE; } @@ -2619,20 +2488,7 @@ BOOL SFMPQAPI WINAPI MpqRenameAndSetFileLocale(MPQHANDLE hMPQ, LPCSTR lpcOldFile oldHashEntry->dwNameHashB = 0xFFFFFFFF; oldHashEntry->lcLocale = 0xFFFFFFFF; oldHashEntry->dwBlockTableIndex = 0xFFFFFFFE; - char *buffer = (char *)SFAlloc(sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - if (buffer!=0) { - memcpy(buffer,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - EncryptData((LPBYTE)buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - } + WriteHashTable(mpqOpenArc); } LCID dwOldLocale=LocaleID; LocaleID=nOldLocale; @@ -2672,22 +2528,7 @@ BOOL SFMPQAPI WINAPI MpqDeleteFileWithLocale(MPQHANDLE hMPQ, LPCSTR lpFileName, hashEntry->dwNameHashB = 0xFFFFFFFF; hashEntry->lcLocale = 0xFFFFFFFF; hashEntry->dwBlockTableIndex = 0xFFFFFFFE; - DWORD tsz; - char *buffer = (char *)SFAlloc(sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - if (buffer!=0) { - memcpy(buffer,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - EncryptData((LPBYTE)buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - - WriteFile(mpqOpenArc->hFile,buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - } + WriteHashTable(mpqOpenArc); LCID dwOldLocale=LocaleID; LocaleID=nLocale; RemoveFromInternalListing(hMPQ,lpFileName); @@ -3080,16 +2921,8 @@ BOOL SFMPQAPI WINAPI MpqCompactArchive(MPQHANDLE hMPQ) SFFree(buffer); CloseHandle(hFile); DeleteFile(lpFileName); - EncryptData((BYTE *)mpqOpenArc->lpHashTable,mpqOpenArc->MpqHeader.dwHashTableSize * sizeof(HASHTABLEENTRY),dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,mpqOpenArc->MpqHeader.dwHashTableSize * sizeof(HASHTABLEENTRY),&tsz,0); - DecryptData((BYTE *)mpqOpenArc->lpHashTable,mpqOpenArc->MpqHeader.dwHashTableSize * sizeof(HASHTABLEENTRY),dwHashTableKey); - if(mpqOpenArc->lpBlockTable!=0) { - EncryptData((BYTE *)mpqOpenArc->lpBlockTable,mpqOpenArc->MpqHeader.dwBlockTableSize * sizeof(BLOCKTABLEENTRY),dwBlockTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwBlockTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpBlockTable,mpqOpenArc->MpqHeader.dwBlockTableSize * sizeof(BLOCKTABLEENTRY),&tsz,0); - DecryptData((BYTE *)mpqOpenArc->lpBlockTable,mpqOpenArc->MpqHeader.dwBlockTableSize * sizeof(BLOCKTABLEENTRY),dwBlockTableKey); - } + WriteHashTable(mpqOpenArc); + WriteBlockTable(mpqOpenArc); return TRUE; } @@ -3110,22 +2943,8 @@ BOOL SFMPQAPI WINAPI MpqSetFileLocale(MPQHANDLE hMPQ, LPCSTR lpFileName, LCID nO if (hashEntry==0) return FALSE; if (hashEntry->lcLocale!=nOldLocale) return FALSE; hashEntry->lcLocale = nNewLocale; - DWORD tsz; - char *buffer = (char *)SFAlloc(sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - if (buffer!=0) { - memcpy(buffer,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize); - EncryptData((LPBYTE)buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,buffer,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - SFFree(buffer); - } - else { - EncryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - SFSetFilePointer(mpqOpenArc->hFile,mpqOpenArc->dwMPQStart+mpqOpenArc->MpqHeader.dwHashTableOffset,FILE_BEGIN); - WriteFile(mpqOpenArc->hFile,mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,&tsz,0); - DecryptData((LPBYTE)mpqOpenArc->lpHashTable,sizeof(HASHTABLEENTRY) * mpqOpenArc->MpqHeader.dwHashTableSize,dwHashTableKey); - } + WriteHashTable(mpqOpenArc); LCID dwOldLocale=LocaleID; LocaleID=nOldLocale; RemoveFromInternalListing(hMPQ,lpFileName); @@ -3537,195 +3356,6 @@ BOOL RemoveFromInternalListing(MPQHANDLE hMPQ, LPCSTR lpFileName) return TRUE; } -size_t strlnlen(const char *strline) -{ - if (strline==0) return 0; - const char *strcr = strchr(strline,'\r'); - const char *strlf = strchr(strline,'\n'); - if (strcr==0 && strlf==0) return strlen(strline); - if (strcr!=0 && (strcr>= 2; - - while(dwLength-- > 0) - - { - seed += dwCryptTable[0x400 + (dwKey & 0xFF)]; - ch = *lpdwBuffer ^ (dwKey + seed); - - dwKey = ((~dwKey << 0x15) + 0x11111111) | (dwKey >> 0x0B); - seed = *lpdwBuffer + seed + (seed << 5) + 3; - - *lpdwBuffer++ = ch; - } - - return TRUE; -} - -BOOL DecryptData(LPBYTE lpbyBuffer, DWORD dwLength, DWORD dwKey) -{ - LPDWORD lpdwBuffer = (LPDWORD)lpbyBuffer; - DWORD seed = 0xEEEEEEEE; - DWORD ch; - - if (!lpbyBuffer) - return FALSE; - - // Round to DWORDs - dwLength >>= 2; - - while(dwLength-- > 0) - { - seed += dwCryptTable[0x400 + (dwKey & 0xFF)]; - ch = *lpdwBuffer ^ (dwKey + seed); - - dwKey = ((~dwKey << 0x15) + 0x11111111) | (dwKey >> 0x0B); - seed = ch + seed + (seed << 5) + 3; - - *lpdwBuffer++ = ch; - } - - return TRUE; -} - -//----------------------------------------------------------------------------- -// Functions tries to get file decryption key. The trick comes from block -// positions which are stored at the begin of each compressed file. We know the -// file size, that means we know number of blocks that means we know the first -// DWORD value in block position. And if we know encrypted and decrypted value, -// we can find the decryption key !!! -// -// hf - MPQ file handle -// block - DWORD array of block positions -// ch - Decrypted value of the first block pos - -static DWORD DetectFileSeed(DWORD * block, DWORD decrypted, DWORD blocksize) -{ - DWORD saveSeed1; - DWORD temp = *block ^ decrypted; // temp = seed1 + seed2 - // temp = seed1 + stormBuffer[0x400 + (seed1 & 0xFF)] + 0xEEEEEEEE - temp -= 0xEEEEEEEE; // temp = seed1 + stormBuffer[0x400 + (seed1 & 0xFF)] - - - for(int i = 0; i < 0x100; i++) // Try all 256 possibilities - { - DWORD seed1; - DWORD seed2 = 0xEEEEEEEE; - DWORD ch; - - // Try the first DWORD (We exactly know the value) - seed1 = temp - dwCryptTable[0x400 + i]; - seed2 += dwCryptTable[0x400 + (seed1 & 0xFF)]; - ch = block[0] ^ (seed1 + seed2); - - if(ch != decrypted) - continue; - - saveSeed1 = seed1 + 1; - - // If OK, continue and test the second value. We don't know exactly the value, - // but we know that the second one has a value less than or equal to the - // size of the block position table plus the block size - seed1 = ((~seed1 << 0x15) + 0x11111111) | (seed1 >> 0x0B); - seed2 = ch + seed2 + (seed2 << 5) + 3; - - seed2 += dwCryptTable[0x400 + (seed1 & 0xFF)]; - ch = block[1] ^ (seed1 + seed2); - - if(ch <= decrypted + blocksize) - return saveSeed1; - } - return 0; -} - DWORD DetectFileSeedEx(MPQARCHIVE * mpqOpenArc, HASHTABLEENTRY * lpHashEntry, LPCSTR * lplpFileName) { if (mpqOpenArc==0 || lpHashEntry==0) return 0;