vrf

Documentation

Overview

Copyright (c) 2018 The MATRIX Authors Distributed under the MIT software license, see the accompanying file COPYING or or http://www.opensource.org/licenses/mit-license.php

Index

• Variables
• func Evaluate(pri *ecdsa.PrivateKey, h hash.Hash, m []byte) (index [32]byte, proof []byte)
• func ProofToHash(pk *ecdsa.PublicKey, h hash.Hash, m, proof []byte) (index [32]byte, err error)
• func Verify(pub *ecdsa.PublicKey, msg, vrf, nizk []byte) (bool, error)
• func Vrf(pri *ecdsa.PrivateKey, msg []byte) (vrf, nizk []byte, err error)

Variables

var (
	ErrKeyNotSupported = errors.New("only support ECC key")
	ErrEvalVRF         = errors.New("failed to evaluate vrf")
)

var (
	ErrInvalidVRF  = errors.New("invalid VRF proof")
	ErrInvalidHash = errors.New("hash function does not match elliptic curve bitsize")
)

Functions

func Evaluate

func Evaluate(pri *ecdsa.PrivateKey, h hash.Hash, m []byte) (index [32]byte, proof []byte)

Evaluate returns the verifiable unpredictable(random) function evaluated at m

func ProofToHash

func ProofToHash(pk *ecdsa.PublicKey, h hash.Hash, m, proof []byte) (index [32]byte, err error)

ProofToHash asserts that proof is correct for m and outputs index.

func Verify

func Verify(pub *ecdsa.PublicKey, msg, vrf, nizk []byte) (bool, error)

Verify returns true if vrf and nizk is correct for msg

func Vrf

func Vrf(pri *ecdsa.PrivateKey, msg []byte) (vrf, nizk []byte, err error)

Vrf returns the verifiable random function evaluated m and a NIZK proof