// 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;
}
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;
}
// 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;
}
// 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;
}
/* 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;
}
