| 42 | } |
| 43 | |
| 44 | static TMPQUserData * IsValidMpqUserData(ULONGLONG ByteOffset, ULONGLONG FileSize, void * pvUserData) |
| 45 | { |
| 46 | TMPQUserData * pUserData; |
| 47 | |
| 48 | // BSWAP the source data and copy them to our buffer |
| 49 | BSWAP_ARRAY32_UNSIGNED(&pvUserData, sizeof(TMPQUserData)); |
| 50 | pUserData = (TMPQUserData *)pvUserData; |
| 51 | |
| 52 | // Check the sizes |
| 53 | if(pUserData->cbUserDataHeader <= pUserData->cbUserDataSize && pUserData->cbUserDataSize <= pUserData->dwHeaderOffs) |
| 54 | { |
| 55 | // Move to the position given by the userdata |
| 56 | ByteOffset += pUserData->dwHeaderOffs; |
| 57 | |
| 58 | // The MPQ header should be within range of the file size |
| 59 | if((ByteOffset + MPQ_HEADER_SIZE_V1) < FileSize) |
| 60 | { |
| 61 | // Note: We should verify if there is the MPQ header. |
| 62 | // However, the header could be at any position below that |
| 63 | // that is multiplier of 0x200 |
| 64 | return (TMPQUserData *)pvUserData; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | return NULL; |
| 69 | } |
| 70 | |
| 71 | // This function gets the right positions of the hash table and the block table. |
| 72 | static int VerifyMpqTablePositions(TMPQArchive * ha, ULONGLONG FileSize) |