static PMPQ_PATCH_HEADER LoadFullFilePatch(TMPQFile * hf, MPQ_PATCH_HEADER & PatchHeader)
{
PMPQ_PATCH_HEADER pFullPatch;
int nError = ERROR_SUCCESS;
// BSWAP the entire header, if needed
BSWAP_ARRAY32_UNSIGNED(&PatchHeader, sizeof(DWORD) * 6);
BSWAP_ARRAY32_UNSIGNED(&PatchHeader.dwXFRM, sizeof(DWORD) * 3);
// Verify the signatures in the patch header
if(PatchHeader.dwSignature != PATCH_SIGNATURE_HEADER || PatchHeader.dwMD5 != PATCH_SIGNATURE_MD5 || PatchHeader.dwXFRM != PATCH_SIGNATURE_XFRM)
return NULL;
// Allocate space for patch header and compressed data
pFullPatch = (PMPQ_PATCH_HEADER)STORM_ALLOC(BYTE, PatchHeader.dwSizeOfPatchData);
if(pFullPatch != NULL)
{
// Copy the patch header
memcpy(pFullPatch, &PatchHeader, sizeof(MPQ_PATCH_HEADER));
// Read the patch, depending on patch type
if(nError == ERROR_SUCCESS)
{
switch(PatchHeader.dwPatchType)
{
case 0x59504f43: // 'COPY'
nError = LoadFilePatch_COPY(hf, pFullPatch);
break;
case 0x30445342: // 'BSD0'
nError = LoadFilePatch_BSD0(hf, pFullPatch);
break;
default:
nError = ERROR_FILE_CORRUPT;
break;
}
}
// If something failed, free the patch buffer
if(nError != ERROR_SUCCESS)
{
STORM_FREE(pFullPatch);
pFullPatch = NULL;
}
}
// Give the result to the caller
return pFullPatch;
}
static TMPQUserData * IsValidMpqUserData(ULONGLONG ByteOffset, ULONGLONG FileSize, void * pvUserData)
{
TMPQUserData * pUserData;
// BSWAP the source data and copy them to our buffer
BSWAP_ARRAY32_UNSIGNED(&pvUserData, sizeof(TMPQUserData));
pUserData = (TMPQUserData *)pvUserData;
// Check the sizes
if(pUserData->cbUserDataHeader <= pUserData->cbUserDataSize && pUserData->cbUserDataSize <= pUserData->dwHeaderOffs)
{
// Move to the position given by the userdata
ByteOffset += pUserData->dwHeaderOffs;
// The MPQ header should be within range of the file size
if((ByteOffset + MPQ_HEADER_SIZE_V1) < FileSize)
{
// Note: We should verify if there is the MPQ header.
// However, the header could be at any position below that
// that is multiplier of 0x200
return (TMPQUserData *)pvUserData;
}
}
return NULL;
}
static int IsMatchingPatchFile(
TMPQArchive * ha,
const char * szFileName,
unsigned char * pbFileMd5)
{
MPQ_PATCH_HEADER PatchHeader = {0};
void * hFile = NULL;
size_t dwTransferred = 0;
int bResult = 0;
/* Open the file and load the patch header */
if(SFileOpenFileEx((void *)ha, szFileName, SFILE_OPEN_BASE_FILE, &hFile))
{
/* Load the patch header */
SFileReadFile(hFile, &PatchHeader, sizeof(MPQ_PATCH_HEADER), &dwTransferred);
BSWAP_ARRAY32_UNSIGNED(pPatchHeader, sizeof(uint32_t) * 6);
/* If the file contains an incremental patch, */
/* compare the "MD5 before patching" with the base file MD5 */
if(dwTransferred == sizeof(MPQ_PATCH_HEADER) && PatchHeader.dwSignature == PATCH_SIGNATURE_HEADER)
bResult = (!memcmp(PatchHeader.md5_before_patch, pbFileMd5, MD5_DIGEST_SIZE));
/* Close the file */
SFileCloseFile(hFile);
}
return bResult;
}
static bool IsMatchingPatchFile(
TMPQArchive * ha,
const char * szFileName,
LPBYTE pbFileMd5)
{
MPQ_PATCH_HEADER PatchHeader = {0};
HANDLE hFile = NULL;
DWORD dwTransferred = 0;
bool bResult = false;
// Open the file and load the patch header
if(SFileOpenFileEx((HANDLE)ha, szFileName, SFILE_OPEN_BASE_FILE, &hFile))
{
// Load the patch header
SFileReadFile(hFile, &PatchHeader, sizeof(MPQ_PATCH_HEADER), &dwTransferred, NULL);
BSWAP_ARRAY32_UNSIGNED(pPatchHeader, sizeof(DWORD) * 6);
// If the file contains an incremental patch,
// compare the "MD5 before patching" with the base file MD5
if(dwTransferred == sizeof(MPQ_PATCH_HEADER) && PatchHeader.dwSignature == PATCH_SIGNATURE_HEADER)
bResult = (!memcmp(PatchHeader.md5_before_patch, pbFileMd5, MD5_DIGEST_SIZE));
// Close the file
SFileCloseFile(hFile);
}
return bResult;
}
static int LoadMpqPatch(TMPQFile * hf)
{
TPatchHeader PatchHeader;
DWORD dwBytesRead;
int nError = ERROR_SUCCESS;
// Read the patch header
SFileReadFile((HANDLE)hf, &PatchHeader, sizeof(TPatchHeader), &dwBytesRead);
if(dwBytesRead != sizeof(TPatchHeader))
nError = ERROR_FILE_CORRUPT;
// Verify the signatures in the patch header
if(nError == ERROR_SUCCESS)
{
// BSWAP the entire header, if needed
BSWAP_ARRAY32_UNSIGNED(&PatchHeader, sizeof(DWORD) * 6);
PatchHeader.dwXFRM = BSWAP_INT32_UNSIGNED(PatchHeader.dwXFRM);
PatchHeader.dwXfrmBlockSize = BSWAP_INT32_UNSIGNED(PatchHeader.dwXfrmBlockSize);
PatchHeader.dwPatchType = BSWAP_INT32_UNSIGNED(PatchHeader.dwPatchType);
if(PatchHeader.dwSignature != 0x48435450 || PatchHeader.dwMD5 != 0x5f35444d || PatchHeader.dwXFRM != 0x4d524658)
nError = ERROR_FILE_CORRUPT;
}
// Read the patch, depending on patch type
if(nError == ERROR_SUCCESS)
{
switch(PatchHeader.dwPatchType)
{
case 0x59504f43: // 'COPY'
nError = LoadMpqPatch_COPY(hf, &PatchHeader);
break;
case 0x30445342: // 'BSD0'
nError = LoadMpqPatch_BSD0(hf, &PatchHeader);
break;
default:
nError = ERROR_FILE_CORRUPT;
break;
}
}
return nError;
}
static int CreatePseudoFileName(void * hFile, TFileEntry * pFileEntry, char * szFileName)
{
TMPQFile * hf = (TMPQFile *)hFile; /* MPQ File handle */
uint32_t FirstBytes[2] = {0, 0}; /* The first 4 bytes of the file */
size_t dwBytesRead = 0;
size_t dwFilePos; /* Saved file position */
/* Read the first 2 uint32_ts bytes from the file */
dwFilePos = SFileSetFilePointer(hFile, 0, NULL, SEEK_CUR);
SFileReadFile(hFile, FirstBytes, sizeof(FirstBytes), &dwBytesRead);
SFileSetFilePointer(hFile, dwFilePos, NULL, SEEK_SET);
/* If we read at least 8 bytes */
if(dwBytesRead == sizeof(FirstBytes))
{
size_t i;
/* Make sure that the array is properly BSWAP-ed */
BSWAP_ARRAY32_UNSIGNED(FirstBytes, sizeof(FirstBytes));
/* Try to guess file extension from those 2 ints */
for(i = 0; data2ext[i].szExt != NULL; i++)
{
if((FirstBytes[0] & data2ext[i].dwOffset00Mask) == data2ext[i].dwOffset00Data &&
(FirstBytes[1] & data2ext[i].dwOffset04Mask) == data2ext[i].dwOffset04Data)
{
char szPseudoName[20] = "";
/* Format the pseudo-name */
sprintf(szPseudoName, "File%08u.%s", (unsigned int)(pFileEntry - hf->ha->pFileTable), data2ext[i].szExt);
/* Save the pseudo-name in the file entry as well */
AllocateFileName(hf->ha, pFileEntry, szPseudoName);
/* If the caller wants to copy the file name, do it */
if(szFileName != NULL)
strcpy(szFileName, szPseudoName);
return ERROR_SUCCESS;
}
}
}
return ERROR_CAN_NOT_COMPLETE;
}
static int CreatePseudoFileName(HANDLE hFile, TFileEntry * pFileEntry, char * szFileName)
{
TMPQFile * hf = (TMPQFile *)hFile; // MPQ File handle
DWORD FirstBytes[2] = {0, 0}; // The first 4 bytes of the file
DWORD dwBytesRead = 0;
DWORD dwFilePos; // Saved file position
// Read the first 2 DWORDs bytes from the file
dwFilePos = SFileSetFilePointer(hFile, 0, NULL, FILE_CURRENT);
SFileReadFile(hFile, FirstBytes, sizeof(FirstBytes), &dwBytesRead, NULL);
SFileSetFilePointer(hFile, dwFilePos, NULL, FILE_BEGIN);
// If we read at least 8 bytes
if(dwBytesRead == sizeof(FirstBytes))
{
// Make sure that the array is properly BSWAP-ed
BSWAP_ARRAY32_UNSIGNED(FirstBytes, sizeof(FirstBytes));
// Try to guess file extension from those 2 DWORDs
for(size_t i = 0; data2ext[i].szExt != NULL; i++)
{
if((FirstBytes[0] & data2ext[i].dwOffset00Mask) == data2ext[i].dwOffset00Data &&
(FirstBytes[1] & data2ext[i].dwOffset04Mask) == data2ext[i].dwOffset04Data)
{
char szPseudoName[20] = "";
// Format the pseudo-name
sprintf(szPseudoName, "File%08u.%s", (unsigned int)(pFileEntry - hf->ha->pFileTable), data2ext[i].szExt);
// Save the pseudo-name in the file entry as well
AllocateFileName(hf->ha, pFileEntry, szPseudoName);
// If the caller wants to copy the file name, do it
if(szFileName != NULL)
strcpy(szFileName, szPseudoName);
return ERROR_SUCCESS;
}
}
}
return ERROR_CAN_NOT_COMPLETE;
}
static bool IsMatchingPatchFile(
TMPQArchive * ha,
const char * szFileName,
LPBYTE pbBaseFileMd5)
{
MPQ_PATCH_HEADER PatchHeader = {0};
HANDLE hFile = NULL;
DWORD dwTransferred = 0;
DWORD dwFlags = 0;
bool bResult = false;
// Open the file and load the patch header
if(SFileOpenFileEx((HANDLE)ha, szFileName, SFILE_OPEN_BASE_FILE, &hFile))
{
// Retrieve the flags. We need to know whether the file is a patch or not
SFileGetFileInfo(hFile, SFileInfoFlags, &dwFlags, sizeof(DWORD), &dwTransferred);
if(dwFlags & MPQ_FILE_PATCH_FILE)
{
// Load the patch header
SFileReadFile(hFile, &PatchHeader, sizeof(MPQ_PATCH_HEADER), &dwTransferred, NULL);
BSWAP_ARRAY32_UNSIGNED(pPatchHeader, sizeof(DWORD) * 6);
// If the file contains an incremental patch,
// compare the "MD5 before patching" with the base file MD5
if(dwTransferred == sizeof(MPQ_PATCH_HEADER) && PatchHeader.dwSignature == PATCH_SIGNATURE_HEADER)
bResult = (!memcmp(PatchHeader.md5_before_patch, pbBaseFileMd5, MD5_DIGEST_SIZE));
}
else
{
// TODO: How to match it if it's not an incremental patch?
// Example: StarCraft II\Updates\enGB\s2-update-enGB-23258.MPQ:
// Mods\Core.SC2Mod\enGB.SC2Assets\StreamingBuckets.txt"
bResult = false;
}
// Close the file
SFileCloseFile(hFile);
}
return bResult;
}
// Copies all file sectors into another archive.
static int CopyMpqFileSectors(
TMPQArchive * ha,
TMPQFile * hf,
TFileStream * pNewStream)
{
TFileEntry * pFileEntry = hf->pFileEntry;
ULONGLONG RawFilePos; // Used for calculating sector offset in the old MPQ archive
ULONGLONG MpqFilePos; // MPQ file position in the new archive
DWORD dwBytesToCopy = pFileEntry->dwCmpSize;
DWORD dwPatchSize = 0; // Size of patch header
DWORD dwFileKey1 = 0; // File key used for decryption
DWORD dwFileKey2 = 0; // File key used for encryption
DWORD dwCmpSize = 0; // Compressed file size, including patch header
int nError = ERROR_SUCCESS;
// Remember the position in the destination file
FileStream_GetPos(pNewStream, &MpqFilePos);
MpqFilePos -= ha->MpqPos;
// Resolve decryption keys. Note that the file key given
// in the TMPQFile structure also includes the key adjustment
if(nError == ERROR_SUCCESS && (pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED))
{
dwFileKey2 = dwFileKey1 = hf->dwFileKey;
if(pFileEntry->dwFlags & MPQ_FILE_FIX_KEY)
{
dwFileKey2 = (dwFileKey1 ^ pFileEntry->dwFileSize) - (DWORD)pFileEntry->ByteOffset;
dwFileKey2 = (dwFileKey2 + (DWORD)MpqFilePos) ^ pFileEntry->dwFileSize;
}
}
// If we have to save patch header, do it
if(nError == ERROR_SUCCESS && hf->pPatchInfo != NULL)
{
BSWAP_ARRAY32_UNSIGNED(hf->pPatchInfo, sizeof(DWORD) * 3);
if(!FileStream_Write(pNewStream, NULL, hf->pPatchInfo, hf->pPatchInfo->dwLength))
nError = GetLastError();
// Save the size of the patch info
dwPatchSize = hf->pPatchInfo->dwLength;
}
// If we have to save sector offset table, do it.
if(nError == ERROR_SUCCESS && hf->SectorOffsets != NULL)
{
DWORD * SectorOffsetsCopy = STORM_ALLOC(DWORD, hf->SectorOffsets[0] / sizeof(DWORD));
DWORD dwSectorOffsLen = hf->SectorOffsets[0];
assert((pFileEntry->dwFlags & MPQ_FILE_SINGLE_UNIT) == 0);
assert(pFileEntry->dwFlags & MPQ_FILE_COMPRESS_MASK);
if(SectorOffsetsCopy == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
// Encrypt the secondary sector offset table and write it to the target file
if(nError == ERROR_SUCCESS)
{
memcpy(SectorOffsetsCopy, hf->SectorOffsets, dwSectorOffsLen);
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
EncryptMpqBlock(SectorOffsetsCopy, dwSectorOffsLen, dwFileKey2 - 1);
BSWAP_ARRAY32_UNSIGNED(SectorOffsetsCopy, dwSectorOffsLen);
if(!FileStream_Write(pNewStream, NULL, SectorOffsetsCopy, dwSectorOffsLen))
nError = GetLastError();
dwBytesToCopy -= dwSectorOffsLen;
dwCmpSize += dwSectorOffsLen;
}
// Update compact progress
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwSectorOffsLen;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
STORM_FREE(SectorOffsetsCopy);
}
// Now we have to copy all file sectors. We do it without
// recompression, because recompression is not necessary in this case
if(nError == ERROR_SUCCESS)
{
for(DWORD dwSector = 0; dwSector < hf->dwSectorCount; dwSector++)
{
DWORD dwRawDataInSector = hf->dwSectorSize;
DWORD dwRawByteOffset = dwSector * hf->dwSectorSize;
// Fix the raw data length if the file is compressed
if(hf->SectorOffsets != NULL)
{
dwRawDataInSector = hf->SectorOffsets[dwSector+1] - hf->SectorOffsets[dwSector];
dwRawByteOffset = hf->SectorOffsets[dwSector];
}
// Last sector: If there is not enough bytes remaining in the file, cut the raw size
if(dwRawDataInSector > dwBytesToCopy)
dwRawDataInSector = dwBytesToCopy;
// Calculate the raw file offset of the file sector
CalculateRawSectorOffset(RawFilePos, hf, dwRawByteOffset);
// Read the file sector
if(!FileStream_Read(ha->pStream, &RawFilePos, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// If necessary, re-encrypt the sector
// Note: Recompression is not necessary here. Unlike encryption,
// the compression does not depend on the position of the file in MPQ.
if((pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED) && dwFileKey1 != dwFileKey2)
{
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
DecryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey1 + dwSector);
EncryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey2 + dwSector);
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
}
// Now write the sector back to the file
if(!FileStream_Write(pNewStream, NULL, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// Update compact progress
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwRawDataInSector;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
// Adjust byte counts
dwBytesToCopy -= dwRawDataInSector;
dwCmpSize += dwRawDataInSector;
}
}
// Copy the sector CRCs, if any
// Sector CRCs are always compressed (not imploded) and unencrypted
if(nError == ERROR_SUCCESS && hf->SectorOffsets != NULL && hf->SectorChksums != NULL)
{
DWORD dwCrcLength;
dwCrcLength = hf->SectorOffsets[hf->dwSectorCount + 1] - hf->SectorOffsets[hf->dwSectorCount];
if(dwCrcLength != 0)
{
if(!FileStream_Read(ha->pStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
if(!FileStream_Write(pNewStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
// Update compact progress
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwCrcLength;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
// Size of the CRC block is also included in the compressed file size
dwBytesToCopy -= dwCrcLength;
dwCmpSize += dwCrcLength;
}
}
// There might be extra data beyond sector checksum table
// Sometimes, these data are even part of sector offset table
// Examples:
// 2012 - WoW\15354\locale-enGB.MPQ:DBFilesClient\SpellLevels.dbc
// 2012 - WoW\15354\locale-enGB.MPQ:Interface\AddOns\Blizzard_AuctionUI\Blizzard_AuctionUI.xml
if(nError == ERROR_SUCCESS && dwBytesToCopy != 0)
{
LPBYTE pbExtraData;
// Allocate space for the extra data
pbExtraData = STORM_ALLOC(BYTE, dwBytesToCopy);
if(pbExtraData != NULL)
{
if(!FileStream_Read(ha->pStream, NULL, pbExtraData, dwBytesToCopy))
nError = GetLastError();
if(!FileStream_Write(pNewStream, NULL, pbExtraData, dwBytesToCopy))
nError = GetLastError();
// Include these extra data in the compressed size
dwCmpSize += dwBytesToCopy;
STORM_FREE(pbExtraData);
}
else
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Write the MD5's of the raw file data, if needed
if(nError == ERROR_SUCCESS && ha->pHeader->dwRawChunkSize != 0)
{
nError = WriteMpqDataMD5(pNewStream,
ha->MpqPos + MpqFilePos,
pFileEntry->dwCmpSize,
ha->pHeader->dwRawChunkSize);
}
// Update file position in the block table
if(nError == ERROR_SUCCESS)
{
// At this point, number of bytes written should be exactly
// the same like the compressed file size. If it isn't,
// there's something wrong (an unknown archive version, MPQ malformation, ...)
//
// Note: Diablo savegames have very weird layout, and the file "hero"
// seems to have improper compressed size. Instead of real compressed size,
// the "dwCmpSize" member of the block table entry contains
// uncompressed size of file data + size of the sector table.
// If we compact the archive, Diablo will refuse to load the game
//
// Note: Some patch files in WOW patches don't count the patch header
// into compressed size
//
if(dwCmpSize <= pFileEntry->dwCmpSize && pFileEntry->dwCmpSize <= dwCmpSize + dwPatchSize)
{
// Note: DO NOT update the compressed size in the file entry, no matter how bad it is.
pFileEntry->ByteOffset = MpqFilePos;
}
else
{
nError = ERROR_FILE_CORRUPT;
assert(false);
}
}
return nError;
}
static int WriteDataToMpqFile(
TMPQArchive * ha,
TMPQFile * hf,
LPBYTE pbFileData,
DWORD dwDataSize,
DWORD dwCompression)
{
TFileEntry * pFileEntry = hf->pFileEntry;
ULONGLONG ByteOffset;
LPBYTE pbCompressed = NULL; // Compressed (target) data
LPBYTE pbToWrite = NULL; // Data to write to the file
int nCompressionLevel = -1; // ADPCM compression level (only used for wave files)
int nError = ERROR_SUCCESS;
// If the caller wants ADPCM compression, we will set wave compression level to 4,
// which corresponds to medium quality
if(dwCompression & LOSSY_COMPRESSION_MASK)
nCompressionLevel = 4;
// Make sure that the caller won't overrun the previously initiated file size
assert(hf->dwFilePos + dwDataSize <= pFileEntry->dwFileSize);
assert(hf->dwSectorCount != 0);
assert(hf->pbFileSector != NULL);
if((hf->dwFilePos + dwDataSize) > pFileEntry->dwFileSize)
return ERROR_DISK_FULL;
pbToWrite = hf->pbFileSector;
// Now write all data to the file sector buffer
if(nError == ERROR_SUCCESS)
{
DWORD dwBytesInSector = hf->dwFilePos % hf->dwSectorSize;
DWORD dwSectorIndex = hf->dwFilePos / hf->dwSectorSize;
DWORD dwBytesToCopy;
// Process all data.
while(dwDataSize != 0)
{
dwBytesToCopy = dwDataSize;
// Check for sector overflow
if(dwBytesToCopy > (hf->dwSectorSize - dwBytesInSector))
dwBytesToCopy = (hf->dwSectorSize - dwBytesInSector);
// Copy the data to the file sector
memcpy(hf->pbFileSector + dwBytesInSector, pbFileData, dwBytesToCopy);
dwBytesInSector += dwBytesToCopy;
pbFileData += dwBytesToCopy;
dwDataSize -= dwBytesToCopy;
// Update the file position
hf->dwFilePos += dwBytesToCopy;
// If the current sector is full, or if the file is already full,
// then write the data to the MPQ
if(dwBytesInSector >= hf->dwSectorSize || hf->dwFilePos >= pFileEntry->dwFileSize)
{
// Set the position in the file
ByteOffset = hf->RawFilePos + pFileEntry->dwCmpSize;
// Update CRC32 and MD5 of the file
md5_process((hash_state *)hf->hctx, hf->pbFileSector, dwBytesInSector);
hf->dwCrc32 = crc32(hf->dwCrc32, hf->pbFileSector, dwBytesInSector);
// Compress the file sector, if needed
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESSED)
{
int nOutBuffer = (int)dwBytesInSector;
int nInBuffer = (int)dwBytesInSector;
// If the file is compressed, allocate buffer for the compressed data.
// Note that we allocate buffer that is a bit longer than sector size,
// for case if the compression method performs a buffer overrun
if(pbCompressed == NULL)
{
pbToWrite = pbCompressed = STORM_ALLOC(BYTE, hf->dwSectorSize + 0x100);
if(pbCompressed == NULL)
{
nError = ERROR_NOT_ENOUGH_MEMORY;
break;
}
}
//
// Note that both SCompImplode and SCompCompress give original buffer,
// if they are unable to comperss the data.
//
if(pFileEntry->dwFlags & MPQ_FILE_IMPLODE)
{
SCompImplode((char *)pbCompressed,
&nOutBuffer,
(char *)hf->pbFileSector,
nInBuffer);
}
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
{
SCompCompress((char *)pbCompressed,
&nOutBuffer,
(char *)hf->pbFileSector,
nInBuffer,
(unsigned)dwCompression,
0,
nCompressionLevel);
}
// Update sector positions
dwBytesInSector = nOutBuffer;
if(hf->SectorOffsets != NULL)
hf->SectorOffsets[dwSectorIndex+1] = hf->SectorOffsets[dwSectorIndex] + dwBytesInSector;
// We have to calculate sector CRC, if enabled
if(hf->SectorChksums != NULL)
hf->SectorChksums[dwSectorIndex] = adler32(0, pbCompressed, nOutBuffer);
}
// Encrypt the sector, if necessary
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED(pbToWrite, dwBytesInSector);
EncryptMpqBlock(pbToWrite, dwBytesInSector, hf->dwFileKey + dwSectorIndex);
BSWAP_ARRAY32_UNSIGNED(pbToWrite, dwBytesInSector);
}
// Write the file sector
if(!FileStream_Write(ha->pStream, &ByteOffset, pbToWrite, dwBytesInSector))
{
nError = GetLastError();
break;
}
// Call the compact callback, if any
if(AddFileCB != NULL)
AddFileCB(pvUserData, hf->dwFilePos, hf->dwDataSize, false);
// Update the compressed file size
pFileEntry->dwCmpSize += dwBytesInSector;
dwBytesInSector = 0;
dwSectorIndex++;
}
}
}
// Cleanup
if(pbCompressed != NULL)
STORM_FREE(pbCompressed);
return nError;
}
static int RecryptFileData(
TMPQArchive * ha,
TMPQFile * hf,
const char * szFileName,
const char * szNewFileName)
{
ULONGLONG RawFilePos;
TFileEntry * pFileEntry = hf->pFileEntry;
DWORD dwBytesToRecrypt = pFileEntry->dwCmpSize;
DWORD dwOldKey;
DWORD dwNewKey;
int nError = ERROR_SUCCESS;
// The file must be encrypted
assert(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED);
// File decryption key is calculated from the plain name
szNewFileName = GetPlainFileNameA(szNewFileName);
szFileName = GetPlainFileNameA(szFileName);
// Calculate both file keys
dwOldKey = DecryptFileKey(szFileName, pFileEntry->ByteOffset, pFileEntry->dwFileSize, pFileEntry->dwFlags);
dwNewKey = DecryptFileKey(szNewFileName, pFileEntry->ByteOffset, pFileEntry->dwFileSize, pFileEntry->dwFlags);
// Incase the keys are equal, don't recrypt the file
if(dwNewKey == dwOldKey)
return ERROR_SUCCESS;
hf->dwFileKey = dwOldKey;
// Calculate the raw position of the file in the archive
hf->MpqFilePos = pFileEntry->ByteOffset;
hf->RawFilePos = ha->MpqPos + hf->MpqFilePos;
// Allocate buffer for file transfer
nError = AllocateSectorBuffer(hf);
if(nError != ERROR_SUCCESS)
return nError;
// Also allocate buffer for sector offsets
// Note: Don't load sector checksums, we don't need to recrypt them
nError = AllocateSectorOffsets(hf, true);
if(nError != ERROR_SUCCESS)
return nError;
// If we have sector offsets, recrypt these as well
if(hf->SectorOffsets != NULL)
{
// Allocate secondary buffer for sectors copy
DWORD * SectorOffsetsCopy = (DWORD *)STORM_ALLOC(BYTE, hf->SectorOffsets[0]);
DWORD dwSectorOffsLen = hf->SectorOffsets[0];
if(SectorOffsetsCopy == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
// Recrypt the array of sector offsets
memcpy(SectorOffsetsCopy, hf->SectorOffsets, dwSectorOffsLen);
EncryptMpqBlock(SectorOffsetsCopy, dwSectorOffsLen, dwNewKey - 1);
BSWAP_ARRAY32_UNSIGNED(SectorOffsetsCopy, dwSectorOffsLen);
// Write the recrypted array back
if(!FileStream_Write(ha->pStream, &hf->RawFilePos, SectorOffsetsCopy, dwSectorOffsLen))
nError = GetLastError();
STORM_FREE(SectorOffsetsCopy);
}
// Now we have to recrypt all file sectors. We do it without
// recompression, because recompression is not necessary in this case
if(nError == ERROR_SUCCESS)
{
for(DWORD dwSector = 0; dwSector < hf->dwSectorCount; dwSector++)
{
DWORD dwRawDataInSector = hf->dwSectorSize;
DWORD dwRawByteOffset = dwSector * hf->dwSectorSize;
// Last sector: If there is not enough bytes remaining in the file, cut the raw size
if(dwRawDataInSector > dwBytesToRecrypt)
dwRawDataInSector = dwBytesToRecrypt;
// Fix the raw data length if the file is compressed
if(hf->SectorOffsets != NULL)
{
dwRawDataInSector = hf->SectorOffsets[dwSector+1] - hf->SectorOffsets[dwSector];
dwRawByteOffset = hf->SectorOffsets[dwSector];
}
// Calculate the raw file offset of the file sector
CalculateRawSectorOffset(RawFilePos, hf, dwRawByteOffset);
// Read the file sector
if(!FileStream_Read(ha->pStream, &RawFilePos, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// If necessary, re-encrypt the sector
// Note: Recompression is not necessary here. Unlike encryption,
// the compression does not depend on the position of the file in MPQ.
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
DecryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwOldKey + dwSector);
EncryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwNewKey + dwSector);
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
// Write the sector back
if(!FileStream_Write(ha->pStream, &RawFilePos, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// Decrement number of bytes remaining
dwBytesToRecrypt -= hf->dwSectorSize;
}
}
return nError;
}
static int ReadMpqFileSingleUnit(TMPQFile * hf, void * pvBuffer, DWORD dwFilePos, DWORD dwToRead, LPDWORD pdwBytesRead)
{
ULONGLONG RawFilePos = hf->RawFilePos;
TMPQArchive * ha = hf->ha;
TFileEntry * pFileEntry = hf->pFileEntry;
LPBYTE pbCompressed = NULL;
LPBYTE pbRawData;
int nError = ERROR_SUCCESS;
// If the file buffer is not allocated yet, do it.
if(hf->pbFileSector == NULL)
{
nError = AllocateSectorBuffer(hf);
if(nError != ERROR_SUCCESS || hf->pbFileSector == NULL)
return nError;
}
// If the file is a patch file, adjust raw data offset
if(hf->pPatchInfo != NULL)
RawFilePos += hf->pPatchInfo->dwLength;
pbRawData = hf->pbFileSector;
// If the file sector is not loaded yet, do it
if(hf->dwSectorOffs != 0)
{
// Is the file compressed?
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS_MASK)
{
// Allocate space for compressed data
pbCompressed = STORM_ALLOC(BYTE, pFileEntry->dwCmpSize);
if(pbCompressed == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
pbRawData = pbCompressed;
}
// Load the raw (compressed, encrypted) data
if(!FileStream_Read(ha->pStream, &RawFilePos, pbRawData, pFileEntry->dwCmpSize))
{
STORM_FREE(pbCompressed);
return GetLastError();
}
// If the file is encrypted, we have to decrypt the data first
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
DecryptMpqBlock(pbRawData, pFileEntry->dwCmpSize, hf->dwFileKey);
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
}
// If the file is compressed, we have to decompress it now
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS_MASK)
{
int cbOutBuffer = (int)hf->dwDataSize;
int cbInBuffer = (int)pFileEntry->dwCmpSize;
int nResult = 0;
//
// If the file is an incremental patch, the size of compressed data
// is determined as pFileEntry->dwCmpSize - sizeof(TPatchInfo)
//
// In "wow-update-12694.MPQ" from Wow-Cataclysm BETA:
//
// File CmprSize DcmpSize DataSize Compressed?
// -------------------------------------- ---------- -------- -------- ---------------
// esES\DBFilesClient\LightSkyBox.dbc 0xBE->0xA2 0xBC 0xBC Yes
// deDE\DBFilesClient\MountCapability.dbc 0x93->0x77 0x77 0x77 No
//
if(pFileEntry->dwFlags & MPQ_FILE_PATCH_FILE)
cbInBuffer = cbInBuffer - sizeof(TPatchInfo);
// Is the file compressed by Blizzard's multiple compression ?
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
{
// Remember the last used compression
hf->dwCompression0 = pbRawData[0];
// Decompress the file
if(ha->pHeader->wFormatVersion >= MPQ_FORMAT_VERSION_2)
nResult = SCompDecompress2(hf->pbFileSector, &cbOutBuffer, pbRawData, cbInBuffer);
else
nResult = SCompDecompress(hf->pbFileSector, &cbOutBuffer, pbRawData, cbInBuffer);
}
// Is the file compressed by PKWARE Data Compression Library ?
// Note: Single unit files compressed with IMPLODE are not supported by Blizzard
else if(pFileEntry->dwFlags & MPQ_FILE_IMPLODE)
nResult = SCompExplode(hf->pbFileSector, &cbOutBuffer, pbRawData, cbInBuffer);
nError = (nResult != 0) ? ERROR_SUCCESS : ERROR_FILE_CORRUPT;
}
else
{
if(hf->pbFileSector != NULL && pbRawData != hf->pbFileSector)
memcpy(hf->pbFileSector, pbRawData, hf->dwDataSize);
}
// Free the decompression buffer.
if(pbCompressed != NULL)
STORM_FREE(pbCompressed);
// The file sector is now properly loaded
hf->dwSectorOffs = 0;
}
// At this moment, we have the file loaded into the file buffer.
// Copy as much as the caller wants
if(nError == ERROR_SUCCESS && hf->dwSectorOffs == 0)
{
// File position is greater or equal to file size ?
if(dwFilePos >= hf->dwDataSize)
{
*pdwBytesRead = 0;
return ERROR_SUCCESS;
}
// If not enough bytes remaining in the file, cut them
if((hf->dwDataSize - dwFilePos) < dwToRead)
dwToRead = (hf->dwDataSize - dwFilePos);
// Copy the bytes
memcpy(pvBuffer, hf->pbFileSector + dwFilePos, dwToRead);
// Give the number of bytes read
*pdwBytesRead = dwToRead;
return ERROR_SUCCESS;
}
// An error, sorry
return ERROR_CAN_NOT_COMPLETE;
}
// Copies all file sectors into another archive.
static int CopyMpqFileSectors(
TMPQArchive * ha,
TMPQFile * hf,
TFileStream * pNewStream)
{
TFileEntry * pFileEntry = hf->pFileEntry;
ULONGLONG RawFilePos; // Used for calculating sector offset in the old MPQ archive
ULONGLONG MpqFilePos; // MPQ file position in the new archive
DWORD dwBytesToCopy = pFileEntry->dwCmpSize;
DWORD dwFileKey1 = 0; // File key used for decryption
DWORD dwFileKey2 = 0; // File key used for encryption
DWORD dwCmpSize = 0; // Compressed file size
int nError = ERROR_SUCCESS;
// Remember the position in the destination file
FileStream_GetPos(pNewStream, MpqFilePos);
MpqFilePos -= ha->MpqPos;
// Resolve decryption keys. Note that the file key given
// in the TMPQFile structure also includes the key adjustment
if (nError == ERROR_SUCCESS && (pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED))
{
dwFileKey2 = dwFileKey1 = hf->dwFileKey;
if (pFileEntry->dwFlags & MPQ_FILE_FIX_KEY)
{
dwFileKey2 = (dwFileKey1 ^ pFileEntry->dwFileSize) - (DWORD)pFileEntry->ByteOffset;
dwFileKey2 = (dwFileKey2 + (DWORD)MpqFilePos) ^ pFileEntry->dwFileSize;
}
}
// If we have to save patch header, do it
if (nError == ERROR_SUCCESS && hf->PatchInfo != NULL)
{
BSWAP_ARRAY32_UNSIGNED(hf->PatchInfo, sizeof(DWORD) * 3);
if (!FileStream_Write(pNewStream, NULL, hf->PatchInfo, hf->PatchInfo->dwLength))
nError = GetLastError();
// Note: In wow-update-12694.MPQ, the dwCmpSize doesn't
// include the patch header on some files.
dwCmpSize += hf->PatchInfo->dwLength;
}
// If we have to save sector offset table, do it.
if (nError == ERROR_SUCCESS && hf->SectorOffsets != NULL)
{
LPDWORD SectorOffsetsCopy = ALLOCMEM(DWORD, hf->dwSectorCount);
DWORD dwSectorPosLen = hf->dwSectorCount * sizeof(DWORD);
assert((pFileEntry->dwFlags & MPQ_FILE_SINGLE_UNIT) == 0);
assert(pFileEntry->dwFlags & MPQ_FILE_COMPRESSED);
if (SectorOffsetsCopy == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
// Encrypt the secondary sector offset table and write it to the target file
if (nError == ERROR_SUCCESS)
{
memcpy(SectorOffsetsCopy, hf->SectorOffsets, dwSectorPosLen);
if (pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
EncryptMpqBlock(SectorOffsetsCopy, dwSectorPosLen, dwFileKey2 - 1);
BSWAP_ARRAY32_UNSIGNED(SectorOffsetsCopy, dwSectorPosLen);
if (!FileStream_Write(pNewStream, NULL, SectorOffsetsCopy, dwSectorPosLen))
nError = GetLastError();
dwCmpSize += dwSectorPosLen;
}
// Update compact progress
if (CompactCB != NULL)
{
CompactBytesProcessed += dwSectorPosLen;
CompactCB(pvUserData, CCB_COMPACTING_FILES, CompactBytesProcessed, CompactTotalBytes);
}
FREEMEM(SectorOffsetsCopy);
}
// Now we have to copy all file sectors. We do it without
// recompression, because recompression is not necessary in this case
if (nError == ERROR_SUCCESS)
{
for(DWORD dwSector = 0; dwSector < hf->dwDataSectors; dwSector++)
{
DWORD dwRawDataInSector = hf->dwSectorSize;
DWORD dwRawByteOffset = dwSector * hf->dwSectorSize;
// Last sector: If there is not enough bytes remaining in the file, cut the raw size
if (dwRawDataInSector > dwBytesToCopy)
dwRawDataInSector = dwBytesToCopy;
// Fix the raw data length if the file is compressed
if (hf->SectorOffsets != NULL)
{
dwRawDataInSector = hf->SectorOffsets[dwSector+1] - hf->SectorOffsets[dwSector];
dwRawByteOffset = hf->SectorOffsets[dwSector];
}
// Calculate the raw file offset of the file sector
CalculateRawSectorOffset(RawFilePos, hf, dwRawByteOffset);
// Read the file sector
if (!FileStream_Read(ha->pStream, &RawFilePos, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// If necessary, re-encrypt the sector
// Note: Recompression is not necessary here. Unlike encryption,
// the compression does not depend on the position of the file in MPQ.
if ((pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED) && dwFileKey1 != dwFileKey2)
{
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
DecryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey1 + dwSector);
EncryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey2 + dwSector);
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
}
// Now write the sector back to the file
if (!FileStream_Write(pNewStream, NULL, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
// Update compact progress
if (CompactCB != NULL)
{
CompactBytesProcessed += dwRawDataInSector;
CompactCB(pvUserData, CCB_COMPACTING_FILES, CompactBytesProcessed, CompactTotalBytes);
}
// Adjust byte counts
dwBytesToCopy -= hf->dwSectorSize;
dwCmpSize += dwRawDataInSector;
}
}
// Copy the sector CRCs, if any
// Sector CRCs are always compressed (not imploded) and unencrypted
if (nError == ERROR_SUCCESS && hf->SectorOffsets != NULL && hf->SectorChksums != NULL)
{
DWORD dwCrcLength;
dwCrcLength = hf->SectorOffsets[hf->dwSectorCount - 1] - hf->SectorOffsets[hf->dwSectorCount - 2];
if (dwCrcLength != 0)
{
if (!FileStream_Read(ha->pStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
if (!FileStream_Write(pNewStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
// Update compact progress
if (CompactCB != NULL)
{
CompactBytesProcessed += dwCrcLength;
CompactCB(pvUserData, CCB_COMPACTING_FILES, CompactBytesProcessed, CompactTotalBytes);
}
// Size of the CRC block is also included in the compressed file size
dwCmpSize += dwCrcLength;
}
}
// Update file position in the block table
if (nError == ERROR_SUCCESS)
{
// At this point, number of bytes written should be exactly
// the same like the compressed file size. If it isn't,
// there's something wrong (an unknown archive version, MPQ protection, ...)
//
// Note: Diablo savegames have very weird layout, and the file "hero"
// seems to have improper compressed size. Instead of real compressed size,
// the "dwCmpSize" member of the block table entry contains
// uncompressed size of file data + size of the sector table.
// If we compact the archive, Diablo will refuse to load the game
// Seems like some sort of protection to me.
if (dwCmpSize == pFileEntry->dwCmpSize)
{
// Update file pos in the block table
pFileEntry->ByteOffset = MpqFilePos;
}
else
{
nError = ERROR_FILE_CORRUPT;
assert(false);
}
}
return nError;
}
// TODO: Test for archives > 4GB
BOOL WINAPI SFileGetFileName(HANDLE hFile, char * szFileName)
{
TMPQFile * hf = (TMPQFile *)hFile; // MPQ File handle
char * szExt = "xxx"; // Default extension
DWORD dwFirstBytes[2]; // The first 4 bytes of the file
DWORD dwFilePos; // Saved file position
int nError = ERROR_SUCCESS;
int i;
// Pre-zero the output buffer
if(szFileName != NULL)
*szFileName = 0;
// Check valid parameters
if(nError == ERROR_SUCCESS)
{
if(hf == NULL || szFileName == NULL)
nError = ERROR_INVALID_PARAMETER;
}
// If the file name is already filled, return it.
if(nError == ERROR_SUCCESS && *hf->szFileName != 0)
{
if(szFileName != hf->szFileName)
strcpy(szFileName, hf->szFileName);
return TRUE;
}
if(nError == ERROR_SUCCESS)
{
if(hf->dwFileIndex == (DWORD)-1)
nError = ERROR_CAN_NOT_COMPLETE;
}
// Read the first 8 bytes from the file
if(nError == ERROR_SUCCESS)
{
dwFirstBytes[0] = dwFirstBytes[1] = 0;
dwFilePos = SFileSetFilePointer(hf, 0, NULL, FILE_CURRENT);
if(!SFileReadFile(hFile, &dwFirstBytes, sizeof(dwFirstBytes), NULL))
nError = GetLastError();
BSWAP_ARRAY32_UNSIGNED(dwFirstBytes, sizeof(dwFirstBytes) / sizeof(DWORD));
SFileSetFilePointer(hf, dwFilePos, NULL, FILE_BEGIN);
}
if(nError == ERROR_SUCCESS)
{
if((dwFirstBytes[0] & 0x0000FFFF) == ID_EXE)
szExt = "exe";
else if(dwFirstBytes[0] == 0x00000006 && dwFirstBytes[1] == 0x00000001)
szExt = "dc6";
else
{
for(i = 0; id2ext[i].szExt != NULL; i++)
{
if(id2ext[i].dwID == dwFirstBytes[0])
{
szExt = id2ext[i].szExt;
break;
}
}
}
// Create the file name
sprintf(hf->szFileName, "File%08lu.%s", hf->dwFileIndex, szExt);
if(szFileName != hf->szFileName)
strcpy(szFileName, hf->szFileName);
}
return (nError == ERROR_SUCCESS);
}
static int ReadMpqFileSingleUnit(TMPQFile * hf, void * pvBuffer, DWORD dwToRead, LPDWORD pdwBytesRead)
{
ULONGLONG RawFilePos = hf->RawFilePos;
TMPQArchive * ha = hf->ha;
TFileEntry * pFileEntry = hf->pFileEntry;
LPBYTE pbCompressed = NULL;
LPBYTE pbRawData = NULL;
int nError;
// If the file buffer is not allocated yet, do it.
if(hf->pbFileSector == NULL)
{
nError = AllocateSectorBuffer(hf);
if(nError != ERROR_SUCCESS)
return nError;
pbRawData = hf->pbFileSector;
}
// If the file is a patch file, adjust raw data offset
if(hf->pPatchInfo != NULL)
RawFilePos += hf->pPatchInfo->dwLength;
// If the file buffer is not loaded yet, do it
if(hf->dwSectorOffs != 0)
{
//
// In "wow-update-12694.MPQ" from Wow-Cataclysm BETA:
//
// File CmpSize FileSize Data
// -------------------------------------- ------- -------- ---------------
// esES\DBFilesClient\LightSkyBox.dbc 0xBE 0xBC Is compressed
// deDE\DBFilesClient\MountCapability.dbc 0x93 0x77 Is uncompressed
//
// Now tell me how to deal with this mess. Apparently
// someone made a mistake at Blizzard ...
//
if(hf->pPatchInfo != NULL)
{
// Allocate space for
pbCompressed = ALLOCMEM(BYTE, pFileEntry->dwCmpSize);
if(pbCompressed == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
// Read the entire file
if(!FileStream_Read(ha->pStream, &RawFilePos, pbCompressed, pFileEntry->dwCmpSize))
{
FREEMEM(pbCompressed);
return GetLastError();
}
// We assume that patch files are not encrypted
assert((pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED) == 0);
assert((pFileEntry->dwFlags & MPQ_FILE_IMPLODE) == 0);
// Check the 'PTCH' signature to find out if it's compressed or not
if(pbCompressed[0] != 'P' || pbCompressed[1] != 'T' || pbCompressed[2] != 'C' || pbCompressed[3] != 'H')
{
int cbOutBuffer = (int)hf->dwDataSize;
int nResult = SCompDecompress((char *)hf->pbFileSector,
&cbOutBuffer,
(char *)pbCompressed,
(int)pFileEntry->dwCmpSize);
if(nResult == 0)
{
FREEMEM(pbCompressed);
return ERROR_FILE_CORRUPT;
}
}
else
{
memcpy(hf->pbFileSector, pbCompressed, hf->dwDataSize);
}
// Free the decompression buffer.
FREEMEM(pbCompressed);
}
else
{
// If the file is compressed, we have to allocate buffer for compressed data
if(pFileEntry->dwCmpSize < hf->dwDataSize)
{
pbCompressed = ALLOCMEM(BYTE, pFileEntry->dwCmpSize);
if(pbCompressed == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
pbRawData = pbCompressed;
}
// Read the entire file
if(!FileStream_Read(ha->pStream, &RawFilePos, pbRawData, pFileEntry->dwCmpSize))
{
FREEMEM(pbCompressed);
return GetLastError();
}
// If the file is encrypted, we have to decrypt the data first
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
DecryptMpqBlock(pbRawData, pFileEntry->dwCmpSize, hf->dwFileKey);
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
}
// If the file is compressed, we have to decompress it now
if(pFileEntry->dwCmpSize < hf->dwDataSize)
{
int cbOutBuffer = (int)hf->dwDataSize;
int nResult = 0;
// Note: Single unit files compressed with IMPLODE are not supported by Blizzard
if(pFileEntry->dwFlags & MPQ_FILE_IMPLODE)
nResult = SCompExplode((char *)hf->pbFileSector, &cbOutBuffer, (char *)pbRawData, (int)pFileEntry->dwCmpSize);
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
nResult = SCompDecompress((char *)hf->pbFileSector, &cbOutBuffer, (char *)pbRawData, (int)pFileEntry->dwCmpSize);
// Free the decompression buffer.
FREEMEM(pbCompressed);
if(nResult == 0)
return ERROR_FILE_CORRUPT;
}
}
// The file sector is now properly loaded
hf->dwSectorOffs = 0;
}
// At this moment, we have the file loaded into the file buffer.
// Copy as much as the caller wants
if(hf->dwSectorOffs == 0)
{
// File position is greater or equal to file size ?
if(hf->dwFilePos >= hf->dwDataSize)
{
*pdwBytesRead = 0;
return ERROR_SUCCESS;
}
// If not enough bytes remaining in the file, cut them
if((hf->dwDataSize - hf->dwFilePos) < dwToRead)
dwToRead = (hf->dwDataSize - hf->dwFilePos);
// Copy the bytes
memcpy(pvBuffer, hf->pbFileSector + hf->dwFilePos, dwToRead);
hf->dwFilePos += dwToRead;
// Give the number of bytes read
*pdwBytesRead = dwToRead;
return ERROR_SUCCESS;
}
// An error, sorry
return ERROR_CAN_NOT_COMPLETE;
}
static int RecryptFileData(
TMPQArchive * ha,
DWORD dwSaveBlockIndex,
const char * szFileName,
const char * szNewFileName)
{
LARGE_INTEGER BlockFilePos;
LARGE_INTEGER MpqFilePos;
TMPQBlockEx * pBlockEx = ha->pExtBlockTable + dwSaveBlockIndex;
TMPQBlock * pBlock = ha->pBlockTable + dwSaveBlockIndex;
const char * szPlainName;
LPDWORD pdwBlockPos1 = NULL;
LPDWORD pdwBlockPos2 = NULL;
LPBYTE pbFileBlock = NULL;
DWORD dwTransferred;
DWORD dwOldSeed;
DWORD dwNewSeed;
DWORD dwToRead;
int nBlocks;
int nError = ERROR_SUCCESS;
// The file must be encrypted
assert(pBlock->dwFlags & MPQ_FILE_ENCRYPTED);
// File decryption seed is calculated from the plain name
szPlainName = strrchr(szFileName, '\\');
if(szPlainName != NULL)
szFileName = szPlainName + 1;
szPlainName = strrchr(szNewFileName, '\\');
if(szPlainName != NULL)
szNewFileName = szPlainName + 1;
// Calculate both file seeds
dwOldSeed = DecryptFileSeed(szFileName);
dwNewSeed = DecryptFileSeed(szNewFileName);
if(pBlock->dwFlags & MPQ_FILE_FIXSEED)
{
dwOldSeed = (dwOldSeed + pBlock->dwFilePos) ^ pBlock->dwFSize;
dwNewSeed = (dwNewSeed + pBlock->dwFilePos) ^ pBlock->dwFSize;
}
// Incase the seeds are equal, don't recrypt the file
if(dwNewSeed == dwOldSeed)
return ERROR_SUCCESS;
// Calculate the file position of the archived file
MpqFilePos.LowPart = pBlock->dwFilePos;
MpqFilePos.HighPart = pBlockEx->wFilePosHigh;
MpqFilePos.QuadPart += ha->MpqPos.QuadPart;
// Calculate the number of file blocks
nBlocks = pBlock->dwFSize / ha->dwBlockSize;
if(pBlock->dwFSize % ha->dwBlockSize)
nBlocks++;
// If the file is stored as single unit, we recrypt one block only
if(pBlock->dwFlags & MPQ_FILE_SINGLE_UNIT)
{
// Allocate the block
pbFileBlock = ALLOCMEM(BYTE, pBlock->dwCSize);
if(pbFileBlock == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
SetFilePointer(ha->hFile, MpqFilePos.LowPart, &MpqFilePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, pbFileBlock, pBlock->dwCSize, &dwTransferred, NULL);
if(dwTransferred == pBlock->dwCSize)
nError = ERROR_FILE_CORRUPT;
if(nError == ERROR_SUCCESS)
{
// Recrypt the block
DecryptMPQBlock((DWORD *)pbFileBlock, pBlock->dwCSize, dwOldSeed);
EncryptMPQBlock((DWORD *)pbFileBlock, pBlock->dwCSize, dwNewSeed);
// Write it back
SetFilePointer(ha->hFile, MpqFilePos.LowPart, &MpqFilePos.HighPart, FILE_BEGIN);
WriteFile(ha->hFile, pbFileBlock, pBlock->dwCSize, &dwTransferred, NULL);
if(dwTransferred != pBlock->dwCSize)
nError = ERROR_WRITE_FAULT;
}
FREEMEM(pbFileBlock);
return nError;
}
// If the file is compressed, we have to re-crypt block table first,
// then all file blocks
if(pBlock->dwFlags & MPQ_FILE_COMPRESSED)
{
// Allocate buffer for both blocks
pdwBlockPos1 = ALLOCMEM(DWORD, nBlocks + 2);
pdwBlockPos2 = ALLOCMEM(DWORD, nBlocks + 2);
if(pdwBlockPos1 == NULL || pdwBlockPos2 == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
// Calculate number of bytes to be read
dwToRead = (nBlocks + 1) * sizeof(DWORD);
if(pBlock->dwFlags & MPQ_FILE_HAS_EXTRA)
dwToRead += sizeof(DWORD);
// Read the block positions
SetFilePointer(ha->hFile, MpqFilePos.LowPart, &MpqFilePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, pdwBlockPos1, dwToRead, &dwTransferred, NULL);
if(dwTransferred != dwToRead)
nError = ERROR_FILE_CORRUPT;
// Recrypt the block table
if(nError == ERROR_SUCCESS)
{
BSWAP_ARRAY32_UNSIGNED(pdwBlockPos1, dwToRead / sizeof(DWORD));
DecryptMPQBlock(pdwBlockPos1, dwToRead, dwOldSeed - 1);
if(pdwBlockPos1[0] != dwToRead)
nError = ERROR_FILE_CORRUPT;
memcpy(pdwBlockPos2, pdwBlockPos1, dwToRead);
EncryptMPQBlock(pdwBlockPos2, dwToRead, dwNewSeed - 1);
BSWAP_ARRAY32_UNSIGNED(pdwBlockPos2, dwToRead / sizeof(DWORD));
}
// Write the recrypted block table back
if(nError == ERROR_SUCCESS)
{
SetFilePointer(ha->hFile, MpqFilePos.LowPart, &MpqFilePos.HighPart, FILE_BEGIN);
WriteFile(ha->hFile, pdwBlockPos2, dwToRead, &dwTransferred, NULL);
if(dwTransferred != dwToRead)
nError = ERROR_WRITE_FAULT;
}
}
// Allocate the transfer buffer
if(nError == ERROR_SUCCESS)
{
pbFileBlock = ALLOCMEM(BYTE, ha->dwBlockSize);
if(pbFileBlock == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Now we have to recrypt all file blocks
if(nError == ERROR_SUCCESS)
{
for(int nBlock = 0; nBlock < nBlocks; nBlock++)
{
// Calc position and length for uncompressed file
BlockFilePos.QuadPart = MpqFilePos.QuadPart + (ha->dwBlockSize * nBlock);
dwToRead = ha->dwBlockSize;
if(nBlock == nBlocks - 1)
dwToRead = pBlock->dwFSize - (ha->dwBlockSize * (nBlocks - 1));
// Fix position and length for compressed file
if(pBlock->dwFlags & MPQ_FILE_COMPRESS)
{
BlockFilePos.QuadPart = MpqFilePos.QuadPart + pdwBlockPos1[nBlock];
dwToRead = pdwBlockPos1[nBlock+1] - pdwBlockPos1[nBlock];
}
// Read the file block
SetFilePointer(ha->hFile, BlockFilePos.LowPart, &BlockFilePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, pbFileBlock, dwToRead, &dwTransferred, NULL);
if(dwTransferred != dwToRead)
nError = ERROR_FILE_CORRUPT;
// Recrypt the file block
BSWAP_ARRAY32_UNSIGNED((DWORD *)pbFileBlock, dwToRead/sizeof(DWORD));
DecryptMPQBlock((DWORD *)pbFileBlock, dwToRead, dwOldSeed + nBlock);
EncryptMPQBlock((DWORD *)pbFileBlock, dwToRead, dwNewSeed + nBlock);
BSWAP_ARRAY32_UNSIGNED((DWORD *)pbFileBlock, dwToRead/sizeof(DWORD));
// Write the block back
SetFilePointer(ha->hFile, BlockFilePos.LowPart, &BlockFilePos.HighPart, FILE_BEGIN);
WriteFile(ha->hFile, pbFileBlock, dwToRead, &dwTransferred, NULL);
if(dwTransferred != dwToRead)
nError = ERROR_WRITE_FAULT;
}
}
// Free buffers and exit
if(pbFileBlock != NULL)
FREEMEM(pbFileBlock);
if(pdwBlockPos2 != NULL)
FREEMEM(pdwBlockPos2);
if(pdwBlockPos1 != NULL)
FREEMEM(pdwBlockPos1);
return nError;
}
// Copies all file blocks into another archive.
static int CopyMpqFileBlocks(
HANDLE hFile,
TMPQArchive * ha,
TMPQBlockEx * pBlockEx,
TMPQBlock * pBlock,
DWORD dwSeed)
{
LARGE_INTEGER FilePos = {0};
DWORD * pdwBlockPos2 = NULL; // File block positions to be written to target file
DWORD * pdwBlockPos = NULL; // File block positions (unencrypted)
BYTE * pbBlock = NULL; // Buffer for the file block
DWORD dwTransferred; // Number of bytes transferred
DWORD dwCSize = 0; // Compressed file size
DWORD dwBytes = 0; // Number of bytes
DWORD dwSeed1 = 0; // File seed used for decryption
DWORD dwSeed2 = 0; // File seed used for encryption
DWORD nBlocks = 0; // Number of file blocks
DWORD nBlock = 0; // Currently processed file block
int nError = ERROR_SUCCESS;
// When file length is zero, do nothing
if(pBlock->dwFSize == 0)
return ERROR_SUCCESS;
// Calculate number of blocks in the file
if(nError == ERROR_SUCCESS)
{
nBlocks = pBlock->dwFSize / ha->dwBlockSize;
if(pBlock->dwFSize % ha->dwBlockSize)
nBlocks++;
pbBlock = ALLOCMEM(BYTE, ha->dwBlockSize);
if(pbBlock == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Set the position to the begin of the file within archive
if(nError == ERROR_SUCCESS)
{
FilePos.HighPart = pBlockEx->wFilePosHigh;
FilePos.LowPart = pBlock->dwFilePos;
FilePos.QuadPart += ha->MpqPos.QuadPart;
if(SetFilePointer(ha->hFile, FilePos.LowPart, &FilePos.HighPart, FILE_BEGIN) != FilePos.LowPart)
nError = GetLastError();
}
// Remember the position in the destination file
if(nError == ERROR_SUCCESS)
{
FilePos.HighPart = 0;
FilePos.LowPart = SetFilePointer(hFile, 0, &FilePos.HighPart, FILE_CURRENT);
}
// Resolve decryption seeds. The 'dwSeed' parameter is the decryption
// seed for the file.
if(nError == ERROR_SUCCESS && (pBlock->dwFlags & MPQ_FILE_ENCRYPTED))
{
dwSeed1 = dwSeed;
if(pBlock->dwFlags & MPQ_FILE_FIXSEED)
dwSeed = (dwSeed1 ^ pBlock->dwFSize) - pBlock->dwFilePos;
dwSeed2 = dwSeed;
if(pBlock->dwFlags & MPQ_FILE_FIXSEED)
dwSeed2 = (dwSeed + (DWORD)(FilePos.QuadPart - ha->MpqPos.QuadPart)) ^ pBlock->dwFSize;
}
// Load the file positions from the archive and save it to the target file
// (only if the file is compressed)
if(pBlock->dwFlags & MPQ_FILE_COMPRESSED)
{
// Allocate buffers
if(nError == ERROR_SUCCESS)
{
pdwBlockPos = ALLOCMEM(DWORD, nBlocks + 2);
pdwBlockPos2 = ALLOCMEM(DWORD, nBlocks + 2);
if(pdwBlockPos == NULL || pdwBlockPos2 == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Load the block positions
if(nError == ERROR_SUCCESS)
{
dwBytes = (nBlocks + 1) * sizeof(DWORD);
if(pBlock->dwFlags & MPQ_FILE_HAS_EXTRA)
dwBytes += sizeof(DWORD);
ReadFile(ha->hFile, pdwBlockPos, dwBytes, &dwTransferred, NULL);
if(dwTransferred != dwBytes)
nError = ERROR_FILE_CORRUPT;
}
// Re-encrypt the block table positions
if(nError == ERROR_SUCCESS)
{
BSWAP_ARRAY32_UNSIGNED(pdwBlockPos, dwBytes / sizeof(DWORD));
if(pBlock->dwFlags & MPQ_FILE_ENCRYPTED)
{
DecryptMPQBlock(pdwBlockPos, dwBytes, dwSeed1 - 1);
if(pdwBlockPos[0] != dwBytes)
nError = ERROR_FILE_CORRUPT;
memcpy(pdwBlockPos2, pdwBlockPos, dwBytes);
EncryptMPQBlock(pdwBlockPos2, dwBytes, dwSeed2 - 1);
}
else
{
memcpy(pdwBlockPos2, pdwBlockPos, dwBytes);
}
BSWAP_ARRAY32_UNSIGNED(pdwBlockPos2, dwBytes / sizeof(DWORD));
}
// Write to the target file
if(nError == ERROR_SUCCESS)
{
WriteFile(hFile, pdwBlockPos2, dwBytes, &dwTransferred, NULL);
dwCSize += dwTransferred;
if(dwTransferred != dwBytes)
nError = ERROR_DISK_FULL;
}
}
// Now we have to copy all file blocks. We will do it without
// recompression, because re-compression is not necessary in this case
if(nError == ERROR_SUCCESS)
{
for(nBlock = 0; nBlock < nBlocks; nBlock++)
{
// Fix: The last block must not be exactly the size of one block.
dwBytes = ha->dwBlockSize;
if(nBlock == nBlocks - 1)
{
dwBytes = pBlock->dwFSize - (ha->dwBlockSize * (nBlocks - 1));
}
if(pBlock->dwFlags & MPQ_FILE_COMPRESSED)
dwBytes = pdwBlockPos[nBlock+1] - pdwBlockPos[nBlock];
// Read the file block
ReadFile(ha->hFile, pbBlock, dwBytes, &dwTransferred, NULL);
if(dwTransferred != dwBytes)
{
nError = ERROR_FILE_CORRUPT;
break;
}
// If necessary, re-encrypt the block
// Note: Recompression is not necessary here. Unlike encryption,
// the compression does not depend on the position of the file in MPQ.
if((pBlock->dwFlags & MPQ_FILE_ENCRYPTED) && dwSeed1 != dwSeed2)
{
BSWAP_ARRAY32_UNSIGNED((DWORD *)pbBlock, dwBytes/sizeof(DWORD));
DecryptMPQBlock((DWORD *)pbBlock, dwBytes, dwSeed1 + nBlock);
EncryptMPQBlock((DWORD *)pbBlock, dwBytes, dwSeed2 + nBlock);
BSWAP_ARRAY32_UNSIGNED((DWORD *)pbBlock, dwBytes/sizeof(DWORD));
}
// Now write the block back to the file
WriteFile(hFile, pbBlock, dwBytes, &dwTransferred, NULL);
dwCSize += dwTransferred;
if(dwTransferred != dwBytes)
{
nError = ERROR_DISK_FULL;
break;
}
}
}
// Copy the file extras, if any
// These extras does not seem to be encrypted, and their purpose is unknown
if(nError == ERROR_SUCCESS && (pBlock->dwFlags & MPQ_FILE_HAS_EXTRA))
{
dwBytes = pdwBlockPos[nBlocks + 1] - pdwBlockPos[nBlocks];
if(dwBytes != 0)
{
ReadFile(ha->hFile, pbBlock, dwBytes, &dwTransferred, NULL);
if(dwTransferred == dwBytes)
{
WriteFile(hFile, pbBlock, dwBytes, &dwTransferred, NULL);
dwCSize += dwTransferred;
if(dwTransferred != dwBytes)
nError = ERROR_DISK_FULL;
}
else
{
nError = ERROR_FILE_CORRUPT;
}
}
}
// Update file position in the block table
if(nError == ERROR_SUCCESS)
{
// At this point, number of bytes written should be exactly
// the same like the compressed file size. If it isn't, there's something wrong
// (maybe new archive version ?)
assert(dwCSize == pBlock->dwCSize);
// Update file pos in the block table
FilePos.QuadPart -= ha->MpqPos.QuadPart;
pBlockEx->wFilePosHigh = (USHORT)FilePos.HighPart;
pBlock->dwFilePos = FilePos.LowPart;
}
// Cleanup and return
if(pdwBlockPos2 != NULL)
FREEMEM(pdwBlockPos2);
if(pdwBlockPos != NULL)
FREEMEM(pdwBlockPos);
if(pbBlock != NULL)
FREEMEM(pbBlock);
return nError;
}
/* Copies all file sectors into another archive. */
static int CopyMpqFileSectors(
TMPQArchive * ha,
TMPQFile * hf,
TFileStream * pNewStream,
uint64_t MpqFilePos) /* MPQ file position in the new archive */
{
TFileEntry * pFileEntry = hf->pFileEntry;
uint64_t RawFilePos; /* Used for calculating sector offset in the old MPQ archive */
uint32_t dwBytesToCopy = pFileEntry->dwCmpSize;
uint32_t dwPatchSize = 0; /* Size of patch header */
uint32_t dwFileKey1 = 0; /* File key used for decryption */
uint32_t dwFileKey2 = 0; /* File key used for encryption */
uint32_t dwCmpSize = 0; /* Compressed file size, including patch header */
int nError = ERROR_SUCCESS;
/* Resolve decryption keys. Note that the file key given */
/* in the TMPQFile structure also includes the key adjustment */
if(nError == ERROR_SUCCESS && (pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED))
{
dwFileKey2 = dwFileKey1 = hf->dwFileKey;
if(pFileEntry->dwFlags & MPQ_FILE_FIX_KEY)
{
dwFileKey2 = (dwFileKey1 ^ pFileEntry->dwFileSize) - (uint32_t)pFileEntry->ByteOffset;
dwFileKey2 = (dwFileKey2 + (uint32_t)MpqFilePos) ^ pFileEntry->dwFileSize;
}
}
/* If we have to save patch header, do it */
if(nError == ERROR_SUCCESS && hf->pPatchInfo != NULL)
{
BSWAP_ARRAY32_UNSIGNED(hf->pPatchInfo, sizeof(uint32_t) * 3);
if(!FileStream_Write(pNewStream, NULL, hf->pPatchInfo, hf->pPatchInfo->dwLength))
nError = GetLastError();
/* Save the size of the patch info */
dwPatchSize = hf->pPatchInfo->dwLength;
}
/* If we have to save sector offset table, do it. */
if(nError == ERROR_SUCCESS && hf->SectorOffsets != NULL)
{
uint32_t * SectorOffsetsCopy = STORM_ALLOC(uint32_t, hf->SectorOffsets[0] / sizeof(uint32_t));
uint32_t dwSectorOffsLen = hf->SectorOffsets[0];
assert((pFileEntry->dwFlags & MPQ_FILE_SINGLE_UNIT) == 0);
assert(pFileEntry->dwFlags & MPQ_FILE_COMPRESS_MASK);
if(SectorOffsetsCopy == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
/* Encrypt the secondary sector offset table and write it to the target file */
if(nError == ERROR_SUCCESS)
{
memcpy(SectorOffsetsCopy, hf->SectorOffsets, dwSectorOffsLen);
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
EncryptMpqBlock(SectorOffsetsCopy, dwSectorOffsLen, dwFileKey2 - 1);
BSWAP_ARRAY32_UNSIGNED(SectorOffsetsCopy, dwSectorOffsLen);
if(!FileStream_Write(pNewStream, NULL, SectorOffsetsCopy, dwSectorOffsLen))
nError = GetLastError();
dwBytesToCopy -= dwSectorOffsLen;
dwCmpSize += dwSectorOffsLen;
}
/* Update compact progress */
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwSectorOffsLen;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
STORM_FREE(SectorOffsetsCopy);
}
/* Now we have to copy all file sectors. We do it without */
/* recompression, because recompression is not necessary in this case */
if(nError == ERROR_SUCCESS)
{
uint32_t dwSector;
for(dwSector = 0; dwSector < hf->dwSectorCount; dwSector++)
{
uint32_t dwRawDataInSector = hf->dwSectorSize;
uint32_t dwRawByteOffset = dwSector * hf->dwSectorSize;
/* Fix the raw data length if the file is compressed */
if(hf->SectorOffsets != NULL)
{
dwRawDataInSector = hf->SectorOffsets[dwSector+1] - hf->SectorOffsets[dwSector];
dwRawByteOffset = hf->SectorOffsets[dwSector];
}
/* Last sector: If there is not enough bytes remaining in the file, cut the raw size */
if(dwRawDataInSector > dwBytesToCopy)
dwRawDataInSector = dwBytesToCopy;
/* Calculate the raw file offset of the file sector */
RawFilePos = CalculateRawSectorOffset(hf, dwRawByteOffset);
/* Read the file sector */
if(!FileStream_Read(ha->pStream, &RawFilePos, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
/* If necessary, re-encrypt the sector */
/* Note: Recompression is not necessary here. Unlike encryption, */
/* the compression does not depend on the position of the file in MPQ. */
if((pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED) && dwFileKey1 != dwFileKey2)
{
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPT_SERPENT)
DecryptMpqBlockSerpent(hf->pbFileSector, dwRawDataInSector, &(ha->keyScheduleSerpent));
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPT_ANUBIS)
DecryptMpqBlockAnubis(hf->pbFileSector, dwRawDataInSector, &(ha->keyScheduleAnubis));
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
DecryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey1 + dwSector);
EncryptMpqBlock(hf->pbFileSector, dwRawDataInSector, dwFileKey2 + dwSector);
BSWAP_ARRAY32_UNSIGNED(hf->pbFileSector, dwRawDataInSector);
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPT_ANUBIS)
EncryptMpqBlockAnubis(hf->pbFileSector, dwRawDataInSector, &(ha->keyScheduleAnubis));
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPT_SERPENT)
EncryptMpqBlockSerpent(hf->pbFileSector, dwRawDataInSector, &(ha->keyScheduleSerpent));
}
/* Now write the sector back to the file */
if(!FileStream_Write(pNewStream, NULL, hf->pbFileSector, dwRawDataInSector))
{
nError = GetLastError();
break;
}
/* Update compact progress */
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwRawDataInSector;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
/* Adjust byte counts */
dwBytesToCopy -= dwRawDataInSector;
dwCmpSize += dwRawDataInSector;
}
}
/* Copy the sector CRCs, if any */
/* Sector CRCs are always compressed (not imploded) and unencrypted */
if(nError == ERROR_SUCCESS && hf->SectorOffsets != NULL && hf->SectorChksums != NULL)
{
uint32_t dwCrcLength;
dwCrcLength = hf->SectorOffsets[hf->dwSectorCount + 1] - hf->SectorOffsets[hf->dwSectorCount];
if(dwCrcLength != 0)
{
if(!FileStream_Read(ha->pStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
if(!FileStream_Write(pNewStream, NULL, hf->SectorChksums, dwCrcLength))
nError = GetLastError();
/* Update compact progress */
if(ha->pfnCompactCB != NULL)
{
ha->CompactBytesProcessed += dwCrcLength;
ha->pfnCompactCB(ha->pvCompactUserData, CCB_COMPACTING_FILES, ha->CompactBytesProcessed, ha->CompactTotalBytes);
}
/* Size of the CRC block is also included in the compressed file size */
dwBytesToCopy -= dwCrcLength;
dwCmpSize += dwCrcLength;
}
}
/* There might be extra data beyond sector checksum table
* Sometimes, these data are even part of sector offset table
* Examples:
* 2012 - WoW\15354\locale-enGB.MPQ:DBFilesClient\SpellLevels.dbc
* 2012 - WoW\15354\locale-enGB.MPQ:Interface\AddOns\Blizzard_AuctionUI\Blizzard_AuctionUI.xml
*/
if(nError == ERROR_SUCCESS && dwBytesToCopy != 0)
{
unsigned char * pbExtraData;
/* Allocate space for the extra data */
pbExtraData = STORM_ALLOC(uint8_t, dwBytesToCopy);
if(pbExtraData != NULL)
{
if(!FileStream_Read(ha->pStream, NULL, pbExtraData, dwBytesToCopy))
nError = GetLastError();
if(!FileStream_Write(pNewStream, NULL, pbExtraData, dwBytesToCopy))
nError = GetLastError();
/* Include these extra data in the compressed size */
dwCmpSize += dwBytesToCopy;
STORM_FREE(pbExtraData);
}
else
nError = ERROR_NOT_ENOUGH_MEMORY;
}
/* Write the MD5's of the raw file data, if needed */
if(nError == ERROR_SUCCESS && ha->pHeader->dwRawChunkSize != 0)
{
nError = WriteMpqDataMD5(pNewStream,
ha->MpqPos + MpqFilePos,
pFileEntry->dwCmpSize,
ha->pHeader->dwRawChunkSize);
}
/* Verify the number of bytes written */
if(nError == ERROR_SUCCESS)
{
/* At this point, number of bytes written should be exactly
* the same like the compressed file size. If it isn't,
* there's something wrong (an unknown archive version, MPQ malformation, ...)
*
* Note: Diablo savegames have very weird layout, and the file "hero"
* seems to have improper compressed size. Instead of real compressed size,
* the "dwCmpSize" member of the block table entry contains
* uncompressed size of file data + size of the sector table.
* If we compact the archive, Diablo will refuse to load the game
*
* Note: Some patch files in WOW patches don't count the patch header
* into compressed size
*/
if(!(dwCmpSize <= pFileEntry->dwCmpSize && pFileEntry->dwCmpSize <= dwCmpSize + dwPatchSize))
{
nError = ERROR_FILE_CORRUPT;
assert(0);
}
}
return nError;
}
static int ReadMpqFileSingleUnit(TMPQFile * hf, void * pvBuffer, DWORD dwFilePos, DWORD dwToRead, LPDWORD pdwBytesRead)
{
ULONGLONG RawFilePos = hf->RawFilePos;
TMPQArchive * ha = hf->ha;
TFileEntry * pFileEntry = hf->pFileEntry;
LPBYTE pbCompressed = NULL;
LPBYTE pbRawData = NULL;
bool bIsReallyCompressed = false;
int nError = ERROR_SUCCESS;
// If the file buffer is not allocated yet, do it.
if(hf->pbFileSector == NULL)
{
nError = AllocateSectorBuffer(hf);
if(nError != ERROR_SUCCESS)
return nError;
pbRawData = hf->pbFileSector;
}
// If the file is a patch file, adjust raw data offset
if(hf->pPatchInfo != NULL)
RawFilePos += hf->pPatchInfo->dwLength;
// If the file sector is not loaded yet, do it
if(hf->dwSectorOffs != 0)
{
// Is the file compressed?
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
{
// Allocate space for compressed data
pbCompressed = STORM_ALLOC(BYTE, pFileEntry->dwCmpSize);
if(pbCompressed == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
bIsReallyCompressed = true;
pbRawData = pbCompressed;
}
// Load the raw (compressed, encrypted) data
if(!FileStream_Read(ha->pStream, &RawFilePos, pbRawData, pFileEntry->dwCmpSize))
{
STORM_FREE(pbCompressed);
return GetLastError();
}
// If the file is encrypted, we have to decrypt the data first
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
DecryptMpqBlock(pbRawData, pFileEntry->dwCmpSize, hf->dwFileKey);
BSWAP_ARRAY32_UNSIGNED(pbRawData, pFileEntry->dwCmpSize);
}
//
// In "wow-update-12694.MPQ" from Wow-Cataclysm BETA:
//
// File CmpSize FileSize Data
// -------------------------------------- ------- -------- ---------------
// esES\DBFilesClient\LightSkyBox.dbc 0xBE 0xBC Is compressed
// deDE\DBFilesClient\MountCapability.dbc 0x93 0x77 Is uncompressed
//
// Now tell me how to deal with this mess.
//
if(hf->pPatchInfo != NULL)
{
if(pbRawData[0] == 'P' && pbRawData[1] == 'T' && pbRawData[2] == 'C' && pbRawData[3] == 'H')
{
assert(pFileEntry->dwCmpSize >= hf->dwDataSize);
bIsReallyCompressed = false;
}
}
else
{
if(pFileEntry->dwCmpSize >= hf->dwDataSize)
bIsReallyCompressed = false;
}
// If the file is compressed, we have to decompress it now
if(bIsReallyCompressed)
{
int cbOutBuffer = (int)hf->dwDataSize;
// Note: Single unit files compressed with IMPLODE are not supported by Blizzard
if(pFileEntry->dwFlags & MPQ_FILE_IMPLODE)
{
if(!SCompExplode((char *)hf->pbFileSector, &cbOutBuffer, (char *)pbRawData, (int)pFileEntry->dwCmpSize))
nError = ERROR_FILE_CORRUPT;
}
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
{
if(!SCompDecompress((char *)hf->pbFileSector, &cbOutBuffer, (char *)pbRawData, (int)pFileEntry->dwCmpSize))
nError = ERROR_FILE_CORRUPT;
}
}
else
{
if(pbRawData != hf->pbFileSector)
memcpy(hf->pbFileSector, pbRawData, hf->dwDataSize);
}
// Free the decompression buffer.
if(pbCompressed != NULL)
STORM_FREE(pbCompressed);
// The file sector is now properly loaded
hf->dwSectorOffs = 0;
}
// At this moment, we have the file loaded into the file buffer.
// Copy as much as the caller wants
if(nError == ERROR_SUCCESS && hf->dwSectorOffs == 0)
{
// File position is greater or equal to file size ?
if(dwFilePos >= hf->dwDataSize)
{
*pdwBytesRead = 0;
return ERROR_SUCCESS;
}
// If not enough bytes remaining in the file, cut them
if((hf->dwDataSize - dwFilePos) < dwToRead)
dwToRead = (hf->dwDataSize - dwFilePos);
// Copy the bytes
memcpy(pvBuffer, hf->pbFileSector + dwFilePos, dwToRead);
// Give the number of bytes read
*pdwBytesRead = dwToRead;
return ERROR_SUCCESS;
}
// An error, sorry
return ERROR_CAN_NOT_COMPLETE;
}
BOOL SFileOpenArchiveEx(
const char * szMpqName,
DWORD dwPriority,
DWORD dwFlags,
HANDLE * phMPQ,
DWORD dwAccessMode)
{
LARGE_INTEGER TempPos;
TMPQArchive * ha = NULL; // Archive handle
HANDLE hFile = INVALID_HANDLE_VALUE;// Opened archive file handle
DWORD dwMaxBlockIndex = 0; // Maximum value of block entry
DWORD dwBlockTableSize = 0; // Block table size.
DWORD dwTransferred; // Number of bytes read
DWORD dwBytes = 0; // Number of bytes to read
int nError = ERROR_SUCCESS;
// Check the right parameters
if(nError == ERROR_SUCCESS)
{
if(szMpqName == NULL || *szMpqName == 0 || phMPQ == NULL)
nError = ERROR_INVALID_PARAMETER;
}
// Ensure that StormBuffer is allocated
if(nError == ERROR_SUCCESS)
nError = PrepareStormBuffer();
// Open the MPQ archive file
if(nError == ERROR_SUCCESS)
{
hFile = CreateFile(szMpqName, dwAccessMode, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if(hFile == INVALID_HANDLE_VALUE)
nError = GetLastError();
}
// Allocate the MPQhandle
if(nError == ERROR_SUCCESS)
{
if((ha = ALLOCMEM(TMPQArchive, 1)) == NULL)
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Initialize handle structure and allocate structure for MPQ header
if(nError == ERROR_SUCCESS)
{
memset(ha, 0, sizeof(TMPQArchive));
strncpy(ha->szFileName, szMpqName, strlen(szMpqName));
ha->hFile = hFile;
ha->dwPriority = dwPriority;
ha->pHeader = &ha->Header;
ha->pListFile = NULL;
hFile = INVALID_HANDLE_VALUE;
}
// Find the offset of MPQ header within the file
if(nError == ERROR_SUCCESS)
{
LARGE_INTEGER SearchPos = {0};
LARGE_INTEGER MpqPos = {0};
DWORD dwHeaderID;
for(;;)
{
// Invalidate the MPQ ID and read the eventual header
SetFilePointer(ha->hFile, MpqPos.LowPart, &MpqPos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, ha->pHeader, sizeof(TMPQHeader2), &dwTransferred, NULL);
dwHeaderID = BSWAP_INT32_UNSIGNED(ha->pHeader->dwID);
// Special check : Some MPQs are actually AVI files, only with
// changed extension.
if(MpqPos.QuadPart == 0 && IsAviFile(ha->pHeader))
{
nError = ERROR_AVI_FILE;
break;
}
// If different number of bytes read, break the loop
if(dwTransferred != sizeof(TMPQHeader2))
{
nError = ERROR_BAD_FORMAT;
break;
}
// If there is the MPQ shunt signature, process it
if(dwHeaderID == ID_MPQ_SHUNT && ha->pShunt == NULL)
{
// Fill the shunt header
ha->ShuntPos = MpqPos;
ha->pShunt = &ha->Shunt;
memcpy(ha->pShunt, ha->pHeader, sizeof(TMPQShunt));
BSWAP_TMPQSHUNT(ha->pShunt);
// Set the MPQ pos and repeat the search
MpqPos.QuadPart = SearchPos.QuadPart + ha->pShunt->dwHeaderPos;
continue;
}
// There must be MPQ header signature
if(dwHeaderID == ID_MPQ)
{
BSWAP_TMPQHEADER(ha->pHeader);
// Save the position where the MPQ header has been found
ha->MpqPos = MpqPos;
// If valid signature has been found, break the loop
if(ha->pHeader->wFormatVersion == MPQ_FORMAT_VERSION_1)
{
// W3M Map Protectors set some garbage value into the "dwHeaderSize"
// field of MPQ header. This value is apparently ignored by Storm.dll
if(ha->pHeader->dwHeaderSize != sizeof(TMPQHeader) &&
ha->pHeader->dwHeaderSize != sizeof(TMPQHeader2))
{
ha->dwFlags |= MPQ_FLAG_PROTECTED;
ha->pHeader->dwHeaderSize = sizeof(TMPQHeader);
}
if(ha->pHeader->dwHashTablePos < ha->pHeader->dwArchiveSize &&
ha->pHeader->dwBlockTablePos < ha->pHeader->dwArchiveSize)
{
break;
}
}
if(ha->pHeader->wFormatVersion == MPQ_FORMAT_VERSION_2)
{
break;
}
nError = ERROR_NOT_SUPPORTED;
break;
}
// If a MPQ shunt already has been found,
// and no MPQ header was at potision pointed by the shunt,
// then the archive is corrupt
if(ha->pShunt != NULL)
{
nError = ERROR_BAD_FORMAT;
break;
}
// Move to the next possible offset
SearchPos.QuadPart += 0x200;
MpqPos = SearchPos;
}
}
// Relocate tables position
if(nError == ERROR_SUCCESS)
{
// Clear the fields not supported in older formats
if(ha->pHeader->wFormatVersion < MPQ_FORMAT_VERSION_2)
{
ha->pHeader->ExtBlockTablePos.QuadPart = 0;
ha->pHeader->wBlockTablePosHigh = 0;
ha->pHeader->wHashTablePosHigh = 0;
}
ha->dwBlockSize = (0x200 << ha->pHeader->wBlockSize);
nError = RelocateMpqTablePositions(ha);
}
// Allocate buffers
if(nError == ERROR_SUCCESS)
{
//
// Note that the block table should be as large as the hash table
// (For later file additions).
//
// I have found a MPQ which has the block table larger than
// the hash table. We should avoid buffer overruns caused by that.
//
dwBlockTableSize = max(ha->pHeader->dwHashTableSize, ha->pHeader->dwBlockTableSize);
ha->pHashTable = ALLOCMEM(TMPQHash, ha->pHeader->dwHashTableSize);
ha->pBlockTable = ALLOCMEM(TMPQBlock, dwBlockTableSize);
ha->pExtBlockTable = ALLOCMEM(TMPQBlockEx, dwBlockTableSize);
ha->pbBlockBuffer = ALLOCMEM(BYTE, ha->dwBlockSize);
if(!ha->pHashTable || !ha->pBlockTable || !ha->pExtBlockTable || !ha->pbBlockBuffer)
nError = ERROR_NOT_ENOUGH_MEMORY;
}
// Read the hash table into memory
if(nError == ERROR_SUCCESS)
{
dwBytes = ha->pHeader->dwHashTableSize * sizeof(TMPQHash);
SetFilePointer(ha->hFile, ha->HashTablePos.LowPart, &ha->HashTablePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, ha->pHashTable, dwBytes, &dwTransferred, NULL);
if(dwTransferred != dwBytes)
nError = ERROR_FILE_CORRUPT;
}
// Decrypt hash table and check if it is correctly decrypted
if(nError == ERROR_SUCCESS)
{
TMPQHash * pHashEnd = ha->pHashTable + ha->pHeader->dwHashTableSize;
TMPQHash * pHash;
// We have to convert the hash table from LittleEndian
BSWAP_ARRAY32_UNSIGNED((DWORD *)ha->pHashTable, (dwBytes / sizeof(DWORD)));
DecryptHashTable((DWORD *)ha->pHashTable, (BYTE *)"(hash table)", (ha->pHeader->dwHashTableSize * 4));
// Check hash table if is correctly decrypted
for(pHash = ha->pHashTable; pHash < pHashEnd; pHash++)
{
// Note: Some MPQs from World of Warcraft have wPlatform set to 0x0100.
// If not free or deleted hash entry, check for valid values
if(pHash->dwBlockIndex < HASH_ENTRY_DELETED)
{
// The block index should not be larger than size of the block table
if(pHash->dwBlockIndex > ha->pHeader->dwBlockTableSize)
{
nError = ERROR_BAD_FORMAT;
break;
}
// Remember the highest block table entry
if(pHash->dwBlockIndex > dwMaxBlockIndex)
dwMaxBlockIndex = pHash->dwBlockIndex;
}
}
}
// Now, read the block table
if(nError == ERROR_SUCCESS)
{
memset(ha->pBlockTable, 0, dwBlockTableSize * sizeof(TMPQBlock));
dwBytes = ha->pHeader->dwBlockTableSize * sizeof(TMPQBlock);
SetFilePointer(ha->hFile, ha->BlockTablePos.LowPart, &ha->BlockTablePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, ha->pBlockTable, dwBytes, &dwTransferred, NULL);
// We have to convert every DWORD in ha->block from LittleEndian
BSWAP_ARRAY32_UNSIGNED((DWORD *)ha->pBlockTable, dwBytes / sizeof(DWORD));
if(dwTransferred != dwBytes)
nError = ERROR_FILE_CORRUPT;
}
// Decrypt block table.
// Some MPQs don't have Decrypted block table, e.g. cracked Diablo version
// We have to check if block table is really encrypted
if(nError == ERROR_SUCCESS)
{
TMPQBlock * pBlockEnd = ha->pBlockTable + ha->pHeader->dwBlockTableSize;
TMPQBlock * pBlock = ha->pBlockTable;
BOOL bBlockTableEncrypted = FALSE;
// Verify all blocks entries in the table
// The loop usually stops at the first entry
while(pBlock < pBlockEnd)
{
// The lower 8 bits of the MPQ flags are always zero.
// Note that this may change in next MPQ versions
if(pBlock->dwFlags & 0x000000FF)
{
bBlockTableEncrypted = TRUE;
break;
}
// Move to the next block table entry
pBlock++;
}
if(bBlockTableEncrypted)
{
DecryptBlockTable((DWORD *)ha->pBlockTable,
(BYTE *)"(block table)",
(ha->pHeader->dwBlockTableSize * 4));
}
}
// Now, read the extended block table.
// For V1 archives, we still will maintain the extended block table
// (it will be filled with zeros)
// TODO: Test with >4GB
if(nError == ERROR_SUCCESS)
{
memset(ha->pExtBlockTable, 0, dwBlockTableSize * sizeof(TMPQBlockEx));
if(ha->pHeader->ExtBlockTablePos.QuadPart != 0)
{
dwBytes = ha->pHeader->dwBlockTableSize * sizeof(TMPQBlockEx);
SetFilePointer(ha->hFile,
ha->ExtBlockTablePos.LowPart,
&ha->ExtBlockTablePos.HighPart,
FILE_BEGIN);
ReadFile(ha->hFile, ha->pExtBlockTable, dwBytes, &dwTransferred, NULL);
// We have to convert every DWORD in ha->block from LittleEndian
BSWAP_ARRAY16_UNSIGNED((USHORT *)ha->pExtBlockTable, dwBytes / sizeof(USHORT));
// The extended block table is not encrypted (so far)
if(dwTransferred != dwBytes)
nError = ERROR_FILE_CORRUPT;
}
}
// Verify the both block tables (If the MPQ file is not protected)
if(nError == ERROR_SUCCESS && (ha->dwFlags & MPQ_FLAG_PROTECTED) == 0)
{
TMPQBlockEx * pBlockEx = ha->pExtBlockTable;
TMPQBlock * pBlockEnd = ha->pBlockTable + dwMaxBlockIndex + 1;
TMPQBlock * pBlock = ha->pBlockTable;
// If the MPQ file is not protected,
// we will check if all sizes in the block table is correct.
// Note that we will not relocate the block table (change from previous versions)
for(; pBlock < pBlockEnd; pBlock++, pBlockEx++)
{
if(pBlock->dwFlags & MPQ_FILE_EXISTS)
{
// Get the 64-bit file position
TempPos.HighPart = pBlockEx->wFilePosHigh;
TempPos.LowPart = pBlock->dwFilePos;
if(TempPos.QuadPart > ha->MpqSize.QuadPart || pBlock->dwCSize > ha->MpqSize.QuadPart)
{
nError = ERROR_BAD_FORMAT;
break;
}
}
}
}
// If the user didn't specified otherwise,
// include the internal listfile to the TMPQArchive structure
if((dwFlags & MPQ_OPEN_NO_LISTFILE) == 0)
{
if(nError == ERROR_SUCCESS)
SListFileCreateListFile(ha);
// Add the internal listfile
if(nError == ERROR_SUCCESS)
SFileAddListFile((HANDLE)ha, NULL);
}
// Cleanup and exit
if(nError != ERROR_SUCCESS)
{
FreeMPQArchive(ha);
if(hFile != INVALID_HANDLE_VALUE)
CloseHandle(hFile);
SetLastError(nError);
}
else
{
if(pFirstOpen == NULL)
pFirstOpen = ha;
}
*phMPQ = ha;
return (nError == ERROR_SUCCESS);
}
// hf - MPQ File handle.
// pbBuffer - Pointer to target buffer to store sectors.
// dwByteOffset - Position of sector in the file (relative to file begin)
// dwBytesToRead - Number of bytes to read. Must be multiplier of sector size.
// pdwBytesRead - Stored number of bytes loaded
static int ReadMpqSectors(TMPQFile * hf, LPBYTE pbBuffer, DWORD dwByteOffset, DWORD dwBytesToRead, LPDWORD pdwBytesRead)
{
ULONGLONG RawFilePos;
TMPQArchive * ha = hf->ha;
TFileEntry * pFileEntry = hf->pFileEntry;
LPBYTE pbRawSector = NULL;
LPBYTE pbOutSector = pbBuffer;
LPBYTE pbInSector = pbBuffer;
DWORD dwRawBytesToRead;
DWORD dwRawSectorOffset = dwByteOffset;
DWORD dwSectorsToRead = dwBytesToRead / ha->dwSectorSize;
DWORD dwSectorIndex = dwByteOffset / ha->dwSectorSize;
DWORD dwSectorsDone = 0;
DWORD dwBytesRead = 0;
int nError = ERROR_SUCCESS;
// Note that dwByteOffset must be aligned to size of one sector
// Note that dwBytesToRead must be a multiplier of one sector size
// This is local function, so we won't check if that's true.
// Note that files stored in single units are processed by a separate function
// If there is not enough bytes remaining, cut dwBytesToRead
if((dwByteOffset + dwBytesToRead) > hf->dwDataSize)
dwBytesToRead = hf->dwDataSize - dwByteOffset;
dwRawBytesToRead = dwBytesToRead;
// Perform all necessary work to do with compressed files
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESSED)
{
// If the sector positions are not loaded yet, do it
if(hf->SectorOffsets == NULL)
{
nError = AllocateSectorOffsets(hf, true);
if(nError != ERROR_SUCCESS)
return nError;
}
// If the sector checksums are not loaded yet, load them now.
if(hf->SectorChksums == NULL && (pFileEntry->dwFlags & MPQ_FILE_SECTOR_CRC))
{
nError = AllocateSectorChecksums(hf, true);
if(nError != ERROR_SUCCESS)
return nError;
}
// If the file is compressed, also allocate secondary buffer
pbInSector = pbRawSector = ALLOCMEM(BYTE, dwBytesToRead);
if(pbRawSector == NULL)
return ERROR_NOT_ENOUGH_MEMORY;
// Assign the temporary buffer as target for read operation
dwRawSectorOffset = hf->SectorOffsets[dwSectorIndex];
dwRawBytesToRead = hf->SectorOffsets[dwSectorIndex + dwSectorsToRead] - dwRawSectorOffset;
}
// Calculate raw file offset where the sector(s) are stored.
CalculateRawSectorOffset(RawFilePos, hf, dwRawSectorOffset);
// Set file pointer and read all required sectors
if(!FileStream_Read(ha->pStream, &RawFilePos, pbInSector, dwRawBytesToRead))
return GetLastError();
dwBytesRead = 0;
// Now we have to decrypt and decompress all file sectors that have been loaded
for(DWORD i = 0; i < dwSectorsToRead; i++)
{
DWORD dwRawBytesInThisSector = ha->dwSectorSize;
DWORD dwBytesInThisSector = ha->dwSectorSize;
DWORD dwIndex = dwSectorIndex + i;
// If there is not enough bytes in the last sector,
// cut the number of bytes in this sector
if(dwRawBytesInThisSector > dwBytesToRead)
dwRawBytesInThisSector = dwBytesToRead;
if(dwBytesInThisSector > dwBytesToRead)
dwBytesInThisSector = dwBytesToRead;
// If the file is compressed, we have to adjust the raw sector size
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESSED)
dwRawBytesInThisSector = hf->SectorOffsets[dwIndex + 1] - hf->SectorOffsets[dwIndex];
// If the file is encrypted, we have to decrypt the sector
if(pFileEntry->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED(pbInSector, dwRawBytesInThisSector);
// If we don't know the key, try to detect it by file content
if(hf->dwFileKey == 0)
{
hf->dwFileKey = DetectFileKeyByContent(pbInSector, dwBytesInThisSector);
if(hf->dwFileKey == 0)
{
nError = ERROR_UNKNOWN_FILE_KEY;
break;
}
}
DecryptMpqBlock(pbInSector, dwRawBytesInThisSector, hf->dwFileKey + dwIndex);
BSWAP_ARRAY32_UNSIGNED(pbInSector, dwRawBytesInThisSector);
}
// If the file has sector CRC check turned on, perform it
if(hf->bCheckSectorCRCs && hf->SectorChksums != NULL)
{
DWORD dwAdlerExpected = hf->SectorChksums[dwIndex];
DWORD dwAdlerValue = 0;
// We can only check sector CRC when it's not zero
// Neither can we check it if it's 0xFFFFFFFF.
if(dwAdlerExpected != 0 && dwAdlerExpected != 0xFFFFFFFF)
{
dwAdlerValue = adler32(0, pbInSector, dwRawBytesInThisSector);
if(dwAdlerValue != dwAdlerExpected)
{
nError = ERROR_CHECKSUM_ERROR;
break;
}
}
}
// If the sector is really compressed, decompress it.
// WARNING : Some sectors may not be compressed, it can be determined only
// by comparing uncompressed and compressed size !!!
if(dwRawBytesInThisSector < dwBytesInThisSector)
{
int cbOutSector = dwBytesInThisSector;
int cbInSector = dwRawBytesInThisSector;
int nResult = 0;
// Is the file compressed by PKWARE Data Compression Library ?
if(pFileEntry->dwFlags & MPQ_FILE_IMPLODE)
nResult = SCompExplode((char *)pbOutSector, &cbOutSector, (char *)pbInSector, cbInSector);
// Is the file compressed by Blizzard's multiple compression ?
if(pFileEntry->dwFlags & MPQ_FILE_COMPRESS)
nResult = SCompDecompress((char *)pbOutSector, &cbOutSector, (char *)pbInSector, cbInSector);
// Did the decompression fail ?
if(nResult == 0)
{
nError = ERROR_FILE_CORRUPT;
break;
}
}
else
{
if(pbOutSector != pbInSector)
memcpy(pbOutSector, pbInSector, dwBytesInThisSector);
}
// Move pointers
dwBytesToRead -= dwBytesInThisSector;
dwByteOffset += dwBytesInThisSector;
dwBytesRead += dwBytesInThisSector;
pbOutSector += dwBytesInThisSector;
pbInSector += dwRawBytesInThisSector;
dwSectorsDone++;
}
// Free all used buffers
if(pbRawSector != NULL)
FREEMEM(pbRawSector);
// Give the caller thenumber of bytes read
*pdwBytesRead = dwBytesRead;
return nError;
}
// TODO: Test for archives > 4GB
static DWORD WINAPI ReadMPQBlocks(TMPQFile * hf, DWORD dwBlockPos, BYTE * buffer, DWORD blockBytes)
{
LARGE_INTEGER FilePos;
TMPQArchive * ha = hf->ha; // Archive handle
BYTE * tempBuffer = NULL; // Buffer for reading compressed data from the file
DWORD dwFilePos = dwBlockPos; // Reading position from the file
DWORD dwToRead; // Number of bytes to read
DWORD blockNum; // Block number (needed for decrypt)
DWORD dwBytesRead = 0; // Total number of bytes read
DWORD bytesRemain = 0; // Number of data bytes remaining up to the end of the file
DWORD nBlocks; // Number of blocks to load
DWORD i;
// Test parameters. Block position and block size must be block-aligned, block size nonzero
if((dwBlockPos & (ha->dwBlockSize - 1)) || blockBytes == 0)
return 0;
// Check the end of file
if((dwBlockPos + blockBytes) > hf->pBlock->dwFSize)
blockBytes = hf->pBlock->dwFSize - dwBlockPos;
bytesRemain = hf->pBlock->dwFSize - dwBlockPos;
blockNum = dwBlockPos / ha->dwBlockSize;
nBlocks = blockBytes / ha->dwBlockSize;
if(blockBytes % ha->dwBlockSize)
nBlocks++;
// If file has variable block positions, we have to load them
if((hf->pBlock->dwFlags & MPQ_FILE_COMPRESSED) && hf->bBlockPosLoaded == FALSE)
{
// Move file pointer to the begin of the file in the MPQ
if(hf->MpqFilePos.QuadPart != ha->FilePointer.QuadPart)
{
SetFilePointer(ha->hFile, hf->MpqFilePos.LowPart, &hf->MpqFilePos.HighPart, FILE_BEGIN);
}
// Read block positions from begin of file.
dwToRead = (hf->nBlocks+1) * sizeof(DWORD);
if(hf->pBlock->dwFlags & MPQ_FILE_HAS_EXTRA)
dwToRead += sizeof(DWORD);
// Read the block pos table and convert the buffer to little endian
ReadFile(ha->hFile, hf->pdwBlockPos, dwToRead, &dwBytesRead, NULL);
BSWAP_ARRAY32_UNSIGNED(hf->pdwBlockPos, (hf->nBlocks+1));
//
// If the archive if protected some way, perform additional check
// Sometimes, the file appears not to be encrypted, but it is.
//
// Note: In WoW 1.10+, there's a new flag. With this flag present,
// there's one additional entry in the block table.
//
if(hf->pdwBlockPos[0] != dwBytesRead)
hf->pBlock->dwFlags |= MPQ_FILE_ENCRYPTED;
// Decrypt loaded block positions if necessary
if(hf->pBlock->dwFlags & MPQ_FILE_ENCRYPTED)
{
// If we don't know the file seed, try to find it.
if(hf->dwSeed1 == 0)
hf->dwSeed1 = DetectFileSeed(hf->pdwBlockPos, dwBytesRead);
// If we don't know the file seed, sorry but we cannot extract the file.
if(hf->dwSeed1 == 0)
return 0;
// Decrypt block positions
DecryptMPQBlock(hf->pdwBlockPos, dwBytesRead, hf->dwSeed1 - 1);
// Check if the block positions are correctly decrypted
// I don't know why, but sometimes it will result invalid block positions on some files
if(hf->pdwBlockPos[0] != dwBytesRead)
{
// Try once again to detect file seed and decrypt the blocks
// TODO: Test with >4GB
SetFilePointer(ha->hFile, hf->MpqFilePos.LowPart, &hf->MpqFilePos.HighPart, FILE_BEGIN);
ReadFile(ha->hFile, hf->pdwBlockPos, dwToRead, &dwBytesRead, NULL);
BSWAP_ARRAY32_UNSIGNED(hf->pdwBlockPos, (hf->nBlocks+1));
hf->dwSeed1 = DetectFileSeed(hf->pdwBlockPos, dwBytesRead);
DecryptMPQBlock(hf->pdwBlockPos, dwBytesRead, hf->dwSeed1 - 1);
// Check if the block positions are correctly decrypted
if(hf->pdwBlockPos[0] != dwBytesRead)
return 0;
}
}
// Update hf's variables
ha->FilePointer.QuadPart = hf->MpqFilePos.QuadPart + dwBytesRead;
hf->bBlockPosLoaded = TRUE;
}
// Get file position and number of bytes to read
dwFilePos = dwBlockPos;
dwToRead = blockBytes;
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESSED)
{
dwFilePos = hf->pdwBlockPos[blockNum];
dwToRead = hf->pdwBlockPos[blockNum + nBlocks] - dwFilePos;
}
FilePos.QuadPart = hf->MpqFilePos.QuadPart + dwFilePos;
// Get work buffer for store read data
tempBuffer = buffer;
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESSED)
{
if((tempBuffer = ALLOCMEM(BYTE, dwToRead)) == NULL)
{
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return 0;
}
}
// Set file pointer, if necessary
if(ha->FilePointer.QuadPart != FilePos.QuadPart)
{
SetFilePointer(ha->hFile, FilePos.LowPart, &FilePos.HighPart, FILE_BEGIN);
}
// 15018F87 : Read all requested blocks
ReadFile(ha->hFile, tempBuffer, dwToRead, &dwBytesRead, NULL);
ha->FilePointer.QuadPart = FilePos.QuadPart + dwBytesRead;
// Block processing part.
DWORD blockStart = 0; // Index of block start in work buffer
DWORD blockSize = min(blockBytes, ha->dwBlockSize);
DWORD index = blockNum; // Current block index
dwBytesRead = 0; // Clear read byte counter
// Walk through all blocks
for(i = 0; i < nBlocks; i++, index++)
{
BYTE * inputBuffer = tempBuffer + blockStart;
int outLength = ha->dwBlockSize;
if(bytesRemain < (DWORD)outLength)
outLength = bytesRemain;
// Get current block length
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESSED)
blockSize = hf->pdwBlockPos[index+1] - hf->pdwBlockPos[index];
// If block is encrypted, we have to decrypt it.
if(hf->pBlock->dwFlags & MPQ_FILE_ENCRYPTED)
{
BSWAP_ARRAY32_UNSIGNED((DWORD *)inputBuffer, blockSize / sizeof(DWORD));
// If we don't know the seed, try to decode it as WAVE file
if(hf->dwSeed1 == 0)
hf->dwSeed1 = DetectFileSeed2((DWORD *)inputBuffer, 3, ID_WAVE, hf->pBlock->dwFSize - 8, 0x45564157);
// Let's try MSVC's standard EXE or header
if(hf->dwSeed1 == 0)
hf->dwSeed1 = DetectFileSeed2((DWORD *)inputBuffer, 2, 0x00905A4D, 0x00000003);
if(hf->dwSeed1 == 0)
return 0;
DecryptMPQBlock((DWORD *)inputBuffer, blockSize, hf->dwSeed1 + index);
BSWAP_ARRAY32_UNSIGNED((DWORD *)inputBuffer, blockSize / sizeof(DWORD));
}
// If the block is really compressed, decompress it.
// WARNING : Some block may not be compressed, it can be determined only
// by comparing uncompressed and compressed size !!!
if(blockSize < (DWORD)outLength)
{
// Is the file compressed with PKWARE Data Compression Library ?
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESS_PKWARE)
Decompress_pklib((char *)buffer, &outLength, (char *)inputBuffer, (int)blockSize);
// Is it a file compressed by Blizzard's multiple compression ?
// Note that Storm.dll v 1.0.9 distributed with Warcraft III
// passes the full path name of the opened archive as the new last parameter
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESS_MULTI)
SCompDecompress((char *)buffer, &outLength, (char *)inputBuffer, (int)blockSize);
dwBytesRead += outLength;
buffer += outLength;
}
else
{
if(buffer != inputBuffer)
memcpy(buffer, inputBuffer, blockSize);
dwBytesRead += blockSize;
buffer += blockSize;
}
blockStart += blockSize;
bytesRemain -= outLength;
}
// Delete input buffer, if necessary
if(hf->pBlock->dwFlags & MPQ_FILE_COMPRESSED)
FREEMEM(tempBuffer);
return dwBytesRead;
}