database

type Auth struct {
	DigestLWE    *matrix.Matrix
	DigestLWE128 *matrix.Matrix128

	// The global digest that is a hash of all the row digests. Public.
	Digest []byte
	// One digest per row, authenticating all the elements in that row.
	// also used in the integrity amplification scheme to store
	// all the digests
	SubDigests []byte
	// length in bytes of the subdiget
	SubDigestLength int
	// ECC group and hash algorithm used for digest computation and PIR itself
	Group group.Group
	Hash  crypto.Hash
	// Due to lack of the size functions in the lib API, we store it in the db info
	ElementSize int
	ScalarSize  int
}

type Bytes struct {
	Entries []byte
	Info
}

type DB struct {
	KeysInfo []*KeyInfo
	Entries  []uint32

	Info
}

type Elliptic struct {
	Entries []byte
	Info
}

type Info struct {
	NumRows      int
	NumColumns   int
	BlockSize    int
	BlockLengths []int // length of data in blocks defined in number of elements

	// PIR type: classical, merkle
	PIRType string

	*Auth
	*Merkle
}

type KeyInfo struct {
	UserId       *packet.UserId
	CreationTime time.Time
	PubKeyAlgo   packet.PublicKeyAlgorithm
	BitLength    uint16
}

type LWE struct {
	Matrix *matrix.MatrixBytes
	Info
}

type LWE128 struct {
	Matrix *matrix.MatrixBytes
	Info
}

type Merkle struct {
	Root     []byte
	ProofLen int
}