tz

package

v1.8.0 Latest Latest Go to latest Published: Feb 28, 2024 License: Apache-2.0 Imports: 6 Imported by: 11

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Package tz contains Tillich-Zémor checksum implementations using different backends.

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const (
	// Size is the size of a Tillich-Zémor hash sum in bytes.
	Size = 64
)

This section is empty.

func Concat(hs [][]byte) ([]byte, error)

Concat performs combining of hashes based on homomorphic property.

func New() hash.Hash

New returns a new hash.Hash computing the Tillich-Zémor checksum. The Hash also implements encoding.BinaryMarshaler and encoding.BinaryUnmarshaler to marshal and unmarshal the internal state of the hash.

func SubtractL(c, a []byte) (b []byte, err error)

SubtractL returns hash b, such that Concat(a, b) == c This is possible, because Tillich-Zémor hash is actually a matrix which can be inversed.

func SubtractR(c, b []byte) (a []byte, err error)

SubtractR returns hash a, such that Concat(a, b) == c This is possible, because Tillich-Zémor hash is actually a matrix which can be inversed.

func Sum(data []byte) [Size]byte

Sum returns Tillich-Zémor checksum of data.

func Validate(h []byte, hs [][]byte) (bool, error)

Validate checks if hashes in hs combined are equal to h.

type GF127 = gf127.GF127