Line 20: |
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| { | | { |
| uint128 headerMD5; | | uint128 headerMD5; |
− | uint32 metaDataOffset; | + | uint32 gbxHeadersStart; // offset to metadata section |
− | uint32 dataOffset; | + | uint32 dataStart; |
| if version >= 2: | | if version >= 2: |
| { | | { |
− | uint32 metaDataUncompressedSize; | + | uint32 gbxHeadersSize; |
− | uint32 metaDataCompressedSize; | + | uint32 gbxHeadersComprSize; |
| } | | } |
| if version >= 3: | | if version >= 3: |
Line 90: |
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| if (version >= 7) | | if (version >= 7) |
| { | | { |
− | SAuthorInfo AuthorInfo; // uint32 version = 0, string login, string nick, string zone, string extra | + | struct SAuthorInfo |
| + | { |
| + | uint32 Version; |
| + | string Login; |
| + | string Nick; |
| + | string Zone; |
| + | string ExtraInfo; |
| + | }; |
| if (version < 9) | | if (version < 9) |
| { | | { |
Line 106: |
Line 113: |
| if (version >= 13) | | if (version >= 13) |
| string DownloadUrl; | | string DownloadUrl; |
− | uint64 CreationDate; | + | uint64 CreationDate; // Win32 FILETIME structure |
| string Comment; | | string Comment; |
| if (version >= 12) | | if (version >= 12) |
Line 133: |
Line 140: |
| } | | } |
| } | | } |
− | Blowfish encrypted: // Unencrypted, if DecryptFlags & 0x3 == 0 | + | Blowfish encrypted: // Unencrypted, if (DecryptFlags & 0x3) == 0 |
| { | | { |
| uint128 Checksum; | | uint128 Checksum; |
− | uint32 GbxHeadersStart; | + | uint32 GbxHeadersStart; // Offset to the metadata section |
| if version < 15: | | if version < 15: |
− | uint32 DataStart; | + | uint32 DataStart; // If version >= 15: DataStart = HeaderMaxSize |
| if version >= 2: | | if version >= 2: |
| { | | { |
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| | | |
| ===Data=== | | ===Data=== |
− | The content of each file starts at Header.dataOffset + FileDesc.offset in the .pak file. First, an 8-byte plaintext IV is read. Then, FileDesc.compressedSize bytes are read and decrypted using Blowfish in CBC mode, using the same key that was used to decrypt the header. If FileDesc.flags & 0x7C is not zero, the file is compressed and should be decompressed using zlib deflate after decryption (it will end up at FileDesc.uncompressedSize bytes). | + | The content of each file starts at Header.dataStart + FileDesc.offset in the .pak file. From version 15, the data block starts at HeaderMaxSize. First, an 8-byte plaintext IV is read. Then, FileDesc.compressedSize bytes are read and decrypted using Blowfish in CBC mode, using the same key that was used to decrypt the header. If FileDesc.flags & 0x7C is not zero, the file is compressed and should be decompressed using zlib deflate after decryption (it will end up at FileDesc.uncompressedSize bytes). |
| | | |
| The type of the file can be found from the extension in the name, or, if this is not available (many file names are actually just hashes), from the [[Class IDs|class ID]]. | | The type of the file can be found from the extension in the name, or, if this is not available (many file names are actually just hashes), from the [[Class IDs|class ID]]. |