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Shipwright/StormLib/src/SBaseSubTypes.cpp

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/*****************************************************************************/
/* SBaseSubTypes.cpp Copyright (c) Ladislav Zezula 2013 */
/*---------------------------------------------------------------------------*/
/* Conversion routines for archive formats that are similar to MPQ format */
/*---------------------------------------------------------------------------*/
/* Date Ver Who Comment */
/* -------- ---- --- ------- */
/* 02.11.11 1.00 Lad The first version of SBaseSubTypes.cpp */
/*****************************************************************************/
#define __STORMLIB_SELF__
#include "StormLib.h"
#include "StormCommon.h"
/*****************************************************************************/
/* */
/* Support for SQP file format (War of the Immortals) */
/* */
/*****************************************************************************/
typedef struct _TSQPHeader
{
// The ID_MPQ ('MPQ\x1A') signature
DWORD dwID;
// Size of the archive header
DWORD dwHeaderSize;
// 32-bit size of MPQ archive
DWORD dwArchiveSize;
// Offset to the beginning of the hash table, relative to the beginning of the archive.
DWORD dwHashTablePos;
// Offset to the beginning of the block table, relative to the beginning of the archive.
DWORD dwBlockTablePos;
// Number of entries in the hash table. Must be a power of two, and must be less than 2^16 for
// the original MoPaQ format, or less than 2^20 for the Burning Crusade format.
DWORD dwHashTableSize;
// Number of entries in the block table
DWORD dwBlockTableSize;
// Must be zero for SQP files
USHORT wFormatVersion;
// Power of two exponent specifying the number of 512-byte disk sectors in each file sector
// in the archive. The size of each file sector in the archive is 512 * 2 ^ wSectorSize.
USHORT wSectorSize;
} TSQPHeader;
typedef struct _TSQPHash
{
// Most likely the lcLocale+wPlatform.
DWORD dwAlwaysZero;
// If the hash table entry is valid, this is the index into the block table of the file.
// Otherwise, one of the following two values:
// - FFFFFFFFh: Hash table entry is empty, and has always been empty.
// Terminates searches for a given file.
// - FFFFFFFEh: Hash table entry is empty, but was valid at some point (a deleted file).
// Does not terminate searches for a given file.
DWORD dwBlockIndex;
// The hash of the file path, using method A.
DWORD dwName1;
// The hash of the file path, using method B.
DWORD dwName2;
} TSQPHash;
typedef struct _TSQPBlock
{
// Offset of the beginning of the file, relative to the beginning of the archive.
DWORD dwFilePos;
// Flags for the file. See MPQ_FILE_XXXX constants
DWORD dwFlags;
// Compressed file size
DWORD dwCSize;
// Uncompressed file size
DWORD dwFSize;
} TSQPBlock;
//-----------------------------------------------------------------------------
// Functions - SQP file format
// This function converts SQP file header into MPQ file header
DWORD ConvertSqpHeaderToFormat4(
TMPQArchive * ha,
ULONGLONG FileSize,
DWORD dwFlags)
{
TSQPHeader * pSqpHeader = (TSQPHeader *)ha->HeaderData;
TMPQHeader Header;
// SQP files from War of the Immortal use MPQ file format with slightly
// modified structure. These fields have different position:
//
// Offset TMPQHeader TSQPHeader
// ------ ---------- -----------
// 000C wFormatVersion dwHashTablePos (lo)
// 000E wSectorSize dwHashTablePos (hi)
// 001C dwBlockTableSize (lo) wBlockSize
// 001E dwHashTableSize (hi) wFormatVersion
// Can't open the archive with certain flags
if(dwFlags & MPQ_OPEN_FORCE_MPQ_V1)
return ERROR_FILE_CORRUPT;
// The file must not be greater than 4 GB
if((FileSize >> 0x20) != 0)
return ERROR_FILE_CORRUPT;
// Translate the SQP header into a MPQ header
memset(&Header, 0, sizeof(TMPQHeader));
Header.dwID = BSWAP_INT32_UNSIGNED(pSqpHeader->dwID);
Header.dwHeaderSize = BSWAP_INT32_UNSIGNED(pSqpHeader->dwHeaderSize);
Header.dwArchiveSize = BSWAP_INT32_UNSIGNED(pSqpHeader->dwArchiveSize);
Header.dwHashTablePos = BSWAP_INT32_UNSIGNED(pSqpHeader->dwHashTablePos);
Header.dwBlockTablePos = BSWAP_INT32_UNSIGNED(pSqpHeader->dwBlockTablePos);
Header.dwHashTableSize = BSWAP_INT32_UNSIGNED(pSqpHeader->dwHashTableSize);
Header.dwBlockTableSize = BSWAP_INT32_UNSIGNED(pSqpHeader->dwBlockTableSize);
Header.wFormatVersion = BSWAP_INT16_UNSIGNED(pSqpHeader->wFormatVersion);
Header.wSectorSize = BSWAP_INT16_UNSIGNED(pSqpHeader->wSectorSize);
// Verify the SQP header
if(Header.dwID == g_dwMpqSignature && Header.dwHeaderSize == sizeof(TSQPHeader) && Header.dwArchiveSize == FileSize)
{
// Check for fixed values of version and sector size
if(Header.wFormatVersion == MPQ_FORMAT_VERSION_1 && Header.wSectorSize == 3)
{
// Initialize the fields of 3.0 header
Header.ArchiveSize64 = Header.dwArchiveSize;
Header.HashTableSize64 = Header.dwHashTableSize * sizeof(TMPQHash);
Header.BlockTableSize64 = Header.dwBlockTableSize * sizeof(TMPQBlock);
// Copy the converted MPQ header back
memcpy(ha->HeaderData, &Header, sizeof(TMPQHeader));
// Mark this file as SQP file
ha->pfnHashString = HashStringSlash;
ha->dwFlags |= MPQ_FLAG_READ_ONLY;
ha->dwSubType = MPQ_SUBTYPE_SQP;
return ERROR_SUCCESS;
}
}
return ERROR_FILE_CORRUPT;
}
void * LoadSqpTable(TMPQArchive * ha, DWORD dwByteOffset, DWORD cbTableSize, DWORD dwKey)
{
ULONGLONG ByteOffset;
LPBYTE pbSqpTable;
// Allocate buffer for the table
pbSqpTable = STORM_ALLOC(BYTE, cbTableSize);
if(pbSqpTable != NULL)
{
// Load the table
ByteOffset = ha->MpqPos + dwByteOffset;
if(FileStream_Read(ha->pStream, &ByteOffset, pbSqpTable, cbTableSize))
{
// Decrypt the SQP table
DecryptMpqBlock(pbSqpTable, cbTableSize, dwKey);
return pbSqpTable;
}
// Free the table
STORM_FREE(pbSqpTable);
}
return NULL;
}
TMPQHash * LoadSqpHashTable(TMPQArchive * ha)
{
TMPQHeader * pHeader = ha->pHeader;
TSQPHash * pSqpHashTable;
TSQPHash * pSqpHashEnd;
TSQPHash * pSqpHash;
TMPQHash * pMpqHash;
DWORD dwErrCode = ERROR_SUCCESS;
// Load the hash table
pSqpHashTable = (TSQPHash *)LoadSqpTable(ha, pHeader->dwHashTablePos, pHeader->dwHashTableSize * sizeof(TSQPHash), MPQ_KEY_HASH_TABLE);
if(pSqpHashTable != NULL)
{
// Parse the entire hash table and convert it to MPQ hash table
pSqpHashEnd = pSqpHashTable + pHeader->dwHashTableSize;
pMpqHash = (TMPQHash *)pSqpHashTable;
for(pSqpHash = pSqpHashTable; pSqpHash < pSqpHashEnd; pSqpHash++, pMpqHash++)
{
// Ignore free entries
if(pSqpHash->dwBlockIndex != HASH_ENTRY_FREE)
{
// Check block index against the size of the block table
if(pHeader->dwBlockTableSize <= MPQ_BLOCK_INDEX(pSqpHash) && pSqpHash->dwBlockIndex < HASH_ENTRY_DELETED)
dwErrCode = ERROR_FILE_CORRUPT;
// We do not support nonzero locale and platform ID
if(pSqpHash->dwAlwaysZero != 0 && pSqpHash->dwAlwaysZero != HASH_ENTRY_FREE)
dwErrCode = ERROR_FILE_CORRUPT;
// Store the file name hash
pMpqHash->dwName1 = pSqpHash->dwName1;
pMpqHash->dwName2 = pSqpHash->dwName2;
// Store the rest. Note that this must be done last,
// because block index corresponds to pMpqHash->dwName2
pMpqHash->dwBlockIndex = MPQ_BLOCK_INDEX(pSqpHash);
pMpqHash->Platform = 0;
pMpqHash->lcLocale = 0;
}
}
// If an error occured, we need to free the hash table
if(dwErrCode != ERROR_SUCCESS)
{
STORM_FREE(pSqpHashTable);
pSqpHashTable = NULL;
}
}
// Return the converted hash table (or NULL on failure)
return (TMPQHash *)pSqpHashTable;
}
// Loads the SQP Block table and converts it to a MPQ block table
TMPQBlock * LoadSqpBlockTable(TMPQArchive * ha)
{
TMPQHeader * pHeader = ha->pHeader;
TSQPBlock * pSqpBlockTable;
TSQPBlock * pSqpBlockEnd;
TSQPBlock * pSqpBlock;
TMPQBlock * pMpqBlock;
DWORD dwFlags;
DWORD dwErrCode = ERROR_SUCCESS;
// Load the hash table
pSqpBlockTable = (TSQPBlock *)LoadSqpTable(ha, pHeader->dwBlockTablePos, pHeader->dwBlockTableSize * sizeof(TSQPBlock), MPQ_KEY_BLOCK_TABLE);
if(pSqpBlockTable != NULL)
{
// Parse the entire hash table and convert it to MPQ hash table
pSqpBlockEnd = pSqpBlockTable + pHeader->dwBlockTableSize;
pMpqBlock = (TMPQBlock *)pSqpBlockTable;
for(pSqpBlock = pSqpBlockTable; pSqpBlock < pSqpBlockEnd; pSqpBlock++, pMpqBlock++)
{
// Check for valid flags
if(pSqpBlock->dwFlags & ~MPQ_FILE_VALID_FLAGS)
dwErrCode = ERROR_FILE_CORRUPT;
// Convert SQP block table entry to MPQ block table entry
dwFlags = pSqpBlock->dwFlags;
pMpqBlock->dwCSize = pSqpBlock->dwCSize;
pMpqBlock->dwFSize = pSqpBlock->dwFSize;
pMpqBlock->dwFlags = dwFlags;
}
// If an error occured, we need to free the hash table
if(dwErrCode != ERROR_SUCCESS)
{
STORM_FREE(pSqpBlockTable);
pSqpBlockTable = NULL;
}
}
// Return the converted hash table (or NULL on failure)
return (TMPQBlock *)pSqpBlockTable;
}
/*****************************************************************************/
/* */
/* Support for MPK file format (Longwu Online) */
/* */
/*****************************************************************************/
#define MPK_FILE_UNKNOWN_0001 0x00000001 // Seems to be always present
#define MPK_FILE_UNKNOWN_0010 0x00000010 // Seems to be always present
#define MPK_FILE_COMPRESSED 0x00000100 // Indicates a compressed file
#define MPK_FILE_UNKNOWN_2000 0x00002000 // Seems to be always present
#define MPK_FILE_EXISTS 0x01000000 // Seems to be always present
typedef struct _TMPKHeader
{
// The ID_MPK ('MPK\x1A') signature
DWORD dwID;
// Contains '2000'
DWORD dwVersion;
// 32-bit size of the archive
DWORD dwArchiveSize;
// Size of the archive header
DWORD dwHeaderSize;
DWORD dwHashTablePos;
DWORD dwHashTableSize;
DWORD dwBlockTablePos;
DWORD dwBlockTableSize;
DWORD dwUnknownPos;
DWORD dwUnknownSize;
} TMPKHeader;
typedef struct _TMPKHash
{
// The hash of the file path, using method A.
DWORD dwName1;
// The hash of the file path, using method B.
DWORD dwName2;
// The hash of the file path, using method C.
DWORD dwName3;
// If the hash table entry is valid, this is the index into the block table of the file.
// Otherwise, one of the following two values:
// - FFFFFFFFh: Hash table entry is empty, and has always been empty.
// Terminates searches for a given file.
// - FFFFFFFEh: Hash table entry is empty, but was valid at some point (a deleted file).
// Does not terminate searches for a given file.
DWORD dwBlockIndex;
} TMPKHash;
typedef struct _TMPKBlock
{
DWORD dwFlags; // 0x1121 - Compressed , 0x1120 - Not compressed
DWORD dwFilePos; // Offset of the beginning of the file, relative to the beginning of the archive.
DWORD dwFSize; // Uncompressed file size
DWORD dwCSize; // Compressed file size
DWORD dwUnknown; // 0x86364E6D
} TMPKBlock;
//-----------------------------------------------------------------------------
// Local variables - MPK file format
static const unsigned char MpkDecryptionKey[512] =
{
0x60, 0x20, 0x29, 0xE1, 0x01, 0xCE, 0xAA, 0xFE, 0xA3, 0xAB, 0x8E, 0x30, 0xAF, 0x02, 0xD1, 0x7D,
0x41, 0x24, 0x06, 0xBD, 0xAE, 0xBE, 0x43, 0xC3, 0xBA, 0xB7, 0x08, 0x13, 0x51, 0xCF, 0xF8, 0xF7,
0x25, 0x42, 0xA5, 0x4A, 0xDA, 0x0F, 0x52, 0x1C, 0x90, 0x3B, 0x63, 0x49, 0x36, 0xF6, 0xDD, 0x1B,
0xEA, 0x58, 0xD4, 0x40, 0x70, 0x61, 0x55, 0x09, 0xCD, 0x0B, 0xA2, 0x4B, 0x68, 0x2C, 0x8A, 0xF1,
0x3C, 0x3A, 0x65, 0xBB, 0xA1, 0xA8, 0x23, 0x97, 0xFD, 0x15, 0x00, 0x94, 0x88, 0x33, 0x59, 0xE9,
0xFB, 0x69, 0x21, 0xEF, 0x85, 0x5B, 0x57, 0x6C, 0xFA, 0xB5, 0xEE, 0xB8, 0x71, 0xDC, 0xB1, 0x38,
0x0C, 0x0A, 0x5C, 0x56, 0xC9, 0xB4, 0x84, 0x17, 0x1E, 0xE5, 0xD3, 0x5A, 0xCC, 0xFC, 0x11, 0x86,
0x7F, 0x45, 0x4F, 0x54, 0xC8, 0x8D, 0x73, 0x89, 0x79, 0x5D, 0xB3, 0xBF, 0xB9, 0xE3, 0x93, 0xE4,
0x6F, 0x35, 0x2D, 0x46, 0xF2, 0x76, 0xC5, 0x7E, 0xE2, 0xA4, 0xE6, 0xD9, 0x6E, 0x48, 0x34, 0x2B,
0xC6, 0x5F, 0xBC, 0xA0, 0x6D, 0x0D, 0x47, 0x6B, 0x95, 0x96, 0x92, 0x91, 0xB2, 0x27, 0xEB, 0x9E,
0xEC, 0x8F, 0xDF, 0x9C, 0x74, 0x99, 0x64, 0xF5, 0xFF, 0x28, 0xB6, 0x37, 0xF3, 0x7C, 0x81, 0x03,
0x44, 0x62, 0x1F, 0xDB, 0x04, 0x7B, 0xB0, 0x9B, 0x31, 0xA7, 0xDE, 0x78, 0x9F, 0xAD, 0x0E, 0x3F,
0x3E, 0x4D, 0xC7, 0xD7, 0x39, 0x19, 0x5E, 0xC2, 0xD0, 0xAC, 0xE8, 0x1A, 0x87, 0x8B, 0x07, 0x05,
0x22, 0xED, 0x72, 0x2E, 0x1D, 0xC1, 0xA9, 0xD6, 0xE0, 0x83, 0xD5, 0xD8, 0xCB, 0x80, 0xF0, 0x66,
0x7A, 0x9D, 0x50, 0xF9, 0x10, 0x4E, 0x16, 0x14, 0x77, 0x75, 0x6A, 0x67, 0xD2, 0xC0, 0xA6, 0xC4,
0x53, 0x8C, 0x32, 0xCA, 0x82, 0x2A, 0x18, 0x9A, 0xF4, 0x4C, 0x3D, 0x26, 0x12, 0xE7, 0x98, 0x2F,
0x4A, 0x04, 0x0D, 0xAF, 0xB4, 0xCF, 0x12, 0xCE, 0x1A, 0x37, 0x61, 0x39, 0x60, 0x95, 0xBE, 0x25,
0xE4, 0x6E, 0xFC, 0x1B, 0xE7, 0x49, 0xE6, 0x67, 0xF6, 0xC5, 0xCB, 0x2F, 0x27, 0xD4, 0x68, 0xB2,
0x01, 0x52, 0xD0, 0x46, 0x11, 0x20, 0xFB, 0x9D, 0xA9, 0x02, 0xF5, 0x8F, 0x3D, 0x82, 0xD3, 0xFF,
0x0B, 0xB8, 0xF2, 0x4D, 0x8E, 0x81, 0x2C, 0xAB, 0x5F, 0xC4, 0x41, 0x29, 0x40, 0xFA, 0xC0, 0xBF,
0x33, 0x10, 0x21, 0x16, 0xB0, 0x71, 0x83, 0x96, 0x8D, 0x2B, 0x23, 0x3B, 0xF9, 0xC1, 0xE5, 0x72,
0xE2, 0x1C, 0x26, 0xF0, 0x73, 0x36, 0x63, 0x56, 0x31, 0x4E, 0x6B, 0x55, 0x62, 0x79, 0xC6, 0x91,
0x00, 0x35, 0xB1, 0x2A, 0xA6, 0x42, 0xDF, 0xEB, 0x3C, 0x51, 0xEA, 0x97, 0x57, 0x94, 0x8C, 0x80,
0x34, 0x5C, 0xD2, 0x76, 0xA4, 0xE9, 0x85, 0xE8, 0xBB, 0x78, 0xE0, 0xB5, 0xAD, 0x0F, 0x87, 0x70,
0xDD, 0xAE, 0xF4, 0xD9, 0x66, 0x54, 0x6F, 0xCC, 0x4C, 0x77, 0x3E, 0xCD, 0xF1, 0x75, 0x0A, 0xA1,
0x28, 0x9B, 0x9A, 0x7E, 0x4B, 0x98, 0x99, 0x47, 0xFE, 0xA5, 0xF7, 0xB7, 0xA3, 0xE1, 0x9F, 0xBC,
0x93, 0x44, 0x3A, 0x08, 0x89, 0x22, 0xEE, 0xB9, 0x45, 0xD6, 0x06, 0x09, 0xC9, 0xBD, 0x14, 0x0C,
0xB6, 0x5E, 0x9C, 0x7A, 0x65, 0x59, 0xAA, 0x19, 0x5B, 0x7C, 0x18, 0x43, 0x92, 0x13, 0x15, 0x7B,
0xED, 0xD5, 0xC7, 0x17, 0xEF, 0x86, 0x90, 0xC2, 0x74, 0x64, 0xF3, 0xDC, 0x6C, 0x38, 0x05, 0x1D,
0xC8, 0x0E, 0xEC, 0x6A, 0x32, 0xDA, 0xD7, 0xC3, 0xDB, 0x8B, 0x24, 0xB3, 0x5D, 0x2E, 0xBA, 0xA2,
0xD8, 0x03, 0x88, 0x7D, 0x7F, 0x69, 0x8A, 0xFD, 0xCA, 0x4F, 0x30, 0x9E, 0xA0, 0xD1, 0x5A, 0x53,
0xDE, 0x3F, 0x84, 0xAC, 0xF8, 0xA7, 0x2D, 0x1F, 0x1E, 0xE3, 0x58, 0x50, 0x6D, 0x48, 0x07, 0xA8
};
//-----------------------------------------------------------------------------
// Functions - MPK file format
// This function converts MPK file header into MPQ file header
DWORD ConvertMpkHeaderToFormat4(
TMPQArchive * ha,
ULONGLONG FileSize,
DWORD dwFlags)
{
TMPKHeader * pMpkHeader = (TMPKHeader *)ha->HeaderData;
TMPQHeader Header;
// Can't open the archive with certain flags
if(dwFlags & MPQ_OPEN_FORCE_MPQ_V1)
return ERROR_FILE_CORRUPT;
// Translate the MPK header into a MPQ header
// Note: Hash table size and block table size are in bytes, not in entries
memset(&Header, 0, sizeof(TMPQHeader));
Header.dwID = BSWAP_INT32_UNSIGNED(pMpkHeader->dwID);
Header.dwArchiveSize = BSWAP_INT32_UNSIGNED(pMpkHeader->dwArchiveSize);
Header.dwHeaderSize = BSWAP_INT32_UNSIGNED(pMpkHeader->dwHeaderSize);
Header.dwHashTablePos = BSWAP_INT32_UNSIGNED(pMpkHeader->dwHashTablePos);
Header.dwHashTableSize = BSWAP_INT32_UNSIGNED(pMpkHeader->dwHashTableSize) / sizeof(TMPKHash);
Header.dwBlockTablePos = BSWAP_INT32_UNSIGNED(pMpkHeader->dwBlockTablePos);
Header.dwBlockTableSize = BSWAP_INT32_UNSIGNED(pMpkHeader->dwBlockTableSize) / sizeof(TMPKBlock);
// Header.dwUnknownPos = BSWAP_INT32_UNSIGNED(pMpkHeader->dwUnknownPos);
// Header.dwUnknownSize = BSWAP_INT32_UNSIGNED(pMpkHeader->dwUnknownSize);
assert(Header.dwHeaderSize == sizeof(TMPKHeader));
// Verify the MPK header
if(Header.dwID == ID_MPK && Header.dwHeaderSize == sizeof(TMPKHeader) && Header.dwArchiveSize == (DWORD)FileSize)
{
// The header ID must be ID_MPQ
Header.dwID = g_dwMpqSignature;
Header.wFormatVersion = MPQ_FORMAT_VERSION_1;
Header.wSectorSize = 3;
// Initialize the fields of 3.0 header
Header.ArchiveSize64 = Header.dwArchiveSize;
Header.HashTableSize64 = Header.dwHashTableSize * sizeof(TMPQHash);
Header.BlockTableSize64 = Header.dwBlockTableSize * sizeof(TMPQBlock);
// Copy the converted MPQ header back
memcpy(ha->HeaderData, &Header, sizeof(TMPQHeader));
// Mark this file as MPK file
ha->pfnHashString = HashStringLower;
ha->dwFlags |= MPQ_FLAG_READ_ONLY;
ha->dwSubType = MPQ_SUBTYPE_MPK;
return ERROR_SUCCESS;
}
return ERROR_FILE_CORRUPT;
}
// Attempts to search a free hash entry in the hash table being converted.
// The created hash table must always be of nonzero size,
// should have no duplicated items and no deleted entries
TMPQHash * FindFreeHashEntry(TMPQHash * pHashTable, DWORD dwHashTableSize, DWORD dwStartIndex)
{
TMPQHash * pHash;
DWORD dwIndex;
// Set the initial index
dwStartIndex = dwIndex = (dwStartIndex & (dwHashTableSize - 1));
assert(dwHashTableSize != 0);
// Search the hash table and return the found entries in the following priority:
for(;;)
{
// We are not expecting to find matching entry in the hash table being built
// We are not expecting to find deleted entry either
pHash = pHashTable + dwIndex;
// If we found a free entry, we need to stop searching
if(pHash->dwBlockIndex == HASH_ENTRY_FREE)
return pHash;
// Move to the next hash entry.
// If we reached the starting entry, it's failure.
dwIndex = (dwIndex + 1) & (dwHashTableSize - 1);
if(dwIndex == dwStartIndex)
break;
}
// We haven't found anything
assert(false);
return NULL;
}
void DecryptMpkTable(void * pvMpkTable, size_t cbSize)
{
LPBYTE pbMpkTable = (LPBYTE)pvMpkTable;
for(size_t i = 0; i < cbSize; i++)
pbMpkTable[i] = MpkDecryptionKey[pbMpkTable[i]];
}
void * LoadMpkTable(TMPQArchive * ha, DWORD dwByteOffset, DWORD cbTableSize)
{
ULONGLONG ByteOffset;
LPBYTE pbMpkTable = NULL;
// Allocate space for the table
pbMpkTable = STORM_ALLOC(BYTE, cbTableSize);
if(pbMpkTable != NULL)
{
// Load and the MPK hash table
ByteOffset = ha->MpqPos + dwByteOffset;
if(FileStream_Read(ha->pStream, &ByteOffset, pbMpkTable, cbTableSize))
{
// Decrypt the table
DecryptMpkTable(pbMpkTable, cbTableSize);
return pbMpkTable;
}
// Free the MPK table
STORM_FREE(pbMpkTable);
pbMpkTable = NULL;
}
// Return the table
return pbMpkTable;
}
TMPQHash * LoadMpkHashTable(TMPQArchive * ha)
{
TMPQHeader * pHeader = ha->pHeader;
TMPQHash * pHashTable = NULL;
TMPKHash * pMpkHash;
TMPQHash * pHash = NULL;
DWORD dwHashTableSize = pHeader->dwHashTableSize;
// MPKs use different hash table searching.
// Instead of using MPQ_HASH_TABLE_INDEX hash as index,
// they store the value directly in the hash table.
// Also for faster searching, the hash table is sorted ascending by the value
// Load and decrypt the MPK hash table.
pMpkHash = (TMPKHash *)LoadMpkTable(ha, pHeader->dwHashTablePos, pHeader->dwHashTableSize * sizeof(TMPKHash));
if(pMpkHash != NULL)
{
// Calculate the hash table size as if it was real MPQ hash table
pHeader->dwHashTableSize = GetNearestPowerOfTwo(pHeader->dwHashTableSize);
pHeader->HashTableSize64 = pHeader->dwHashTableSize * sizeof(TMPQHash);
// Now allocate table that will serve like a true MPQ hash table,
// so we translate the MPK hash table to MPQ hash table
pHashTable = STORM_ALLOC(TMPQHash, pHeader->dwHashTableSize);
if(pHashTable != NULL)
{
// Set the entire hash table to free
memset(pHashTable, 0xFF, (size_t)pHeader->HashTableSize64);
// Copy the MPK hash table into MPQ hash table
for(DWORD i = 0; i < dwHashTableSize; i++)
{
// Finds the free hash entry in the hash table
// We don't expect any errors here, because we are putting files to empty hash table
pHash = FindFreeHashEntry(pHashTable, pHeader->dwHashTableSize, pMpkHash[i].dwName1);
assert(pHash->dwBlockIndex == HASH_ENTRY_FREE);
// Copy the MPK hash entry to the hash table
pHash->dwBlockIndex = pMpkHash[i].dwBlockIndex;
pHash->Platform = 0;
pHash->lcLocale = 0;
pHash->dwName1 = pMpkHash[i].dwName2;
pHash->dwName2 = pMpkHash[i].dwName3;
}
}
// Free the temporary hash table
STORM_FREE(pMpkHash);
}
return pHashTable;
}
static DWORD ConvertMpkFlagsToMpqFlags(DWORD dwMpkFlags)
{
DWORD dwMpqFlags = MPQ_FILE_EXISTS;
// Check for flags that are always present
assert((dwMpkFlags & MPK_FILE_UNKNOWN_0001) != 0);
assert((dwMpkFlags & MPK_FILE_UNKNOWN_0010) != 0);
assert((dwMpkFlags & MPK_FILE_UNKNOWN_2000) != 0);
assert((dwMpkFlags & MPK_FILE_EXISTS) != 0);
// Append the compressed flag
dwMpqFlags |= (dwMpkFlags & MPK_FILE_COMPRESSED) ? MPQ_FILE_COMPRESS : 0;
// All files in the MPQ seem to be single unit files
dwMpqFlags |= MPQ_FILE_ENCRYPTED | MPQ_FILE_SINGLE_UNIT;
return dwMpqFlags;
}
TMPQBlock * LoadMpkBlockTable(TMPQArchive * ha)
{
TMPQHeader * pHeader = ha->pHeader;
TMPKBlock * pMpkBlockTable;
TMPKBlock * pMpkBlockEnd;
TMPQBlock * pBlockTable = NULL;
TMPKBlock * pMpkBlock;
TMPQBlock * pMpqBlock;
// Load and decrypt the MPK block table
pMpkBlockTable = pMpkBlock = (TMPKBlock *)LoadMpkTable(ha, pHeader->dwBlockTablePos, pHeader->dwBlockTableSize * sizeof(TMPKBlock));
if(pMpkBlockTable != NULL)
{
// Allocate buffer for MPQ-like block table
pBlockTable = pMpqBlock = STORM_ALLOC(TMPQBlock, pHeader->dwBlockTableSize);
if(pBlockTable != NULL)
{
// Convert the MPK block table to MPQ block table
pMpkBlockEnd = pMpkBlockTable + pHeader->dwBlockTableSize;
while(pMpkBlock < pMpkBlockEnd)
{
// Translate the MPK block table entry to MPQ block table entry
pMpqBlock->dwFilePos = pMpkBlock->dwFilePos;
pMpqBlock->dwCSize = pMpkBlock->dwCSize;
pMpqBlock->dwFSize = pMpkBlock->dwFSize;
pMpqBlock->dwFlags = ConvertMpkFlagsToMpqFlags(pMpkBlock->dwFlags);
// Move both
pMpkBlock++;
pMpqBlock++;
}
}
// Free the MPK block table
STORM_FREE(pMpkBlockTable);
}
return pBlockTable;
}
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