vpk

type Archive struct {
	Header
	Header2
	Files  []File
	Hashes []ChunkHash
	PubKey *rsa.PublicKey
}

type ChunkHash struct {
	ArchiveIndex   uint32
	StartingOffset uint32
	Count          uint32
	MD5Checksum    [16]byte
}

type DataChunk struct {
	// A zero based index of the archive this file's data is contained in.
	// If 0x7fff, the data follows the directory.
	ArchiveIndex uint16

	// If ArchiveIndex is 0x7fff, the offset of the file data relative to
	// the end of the directory (see the header for more details).
	//
	// Otherwise, the offset of the data from the start of the specified
	// archive.
	EntryOffset uint32

	// If zero, the entire file is stored in the preload data.
	// Otherwise, the number of bytes stored starting at EntryOffset.
	EntryLength uint32
}

type DirEntry struct {
	// A 32bit CRC of the file's data.
	CRC uint32

	// The number of bytes contained in the index file.
	MetadataBytes uint16

	// The location of the contents of this file (minimum of 1 element).
	DataLocation []DataChunk
}

type File struct {
	Dir  string
	Base string
	Ext  string

	DirEntry

	Metadata []byte
	// contains filtered or unexported fields
}

type Header struct {
	// Must be equal to the Magic constant in this package.
	Magic uint32

	// VPK file format version.
	Version uint32

	// The size, in bytes, of the directory tree.
	TreeSize uint32
}

type Header2 struct {
	// How many bytes of file content are stored in this VPK file.
	EmbeddedChunkSize uint32

	// The size, in bytes, of the section containing MD5 checksums
	// for external archive content.
	ChunkHashesSize uint32

	// The size, in bytes, of the section containing MD5 checksums
	// for content in this file (should always be 48).
	SelfHashesSize uint32

	// The size, in bytes, of the section containing the public key
	// and signature.
	SignatureSize uint32
}

type Opener struct {
	// contains filtered or unexported fields
}