ed25519

README

this is Ed25519 Go implementation that uses blake2b hash function instead of sha512

Documentation

Overview

Package ed25519 implements the Ed25519 signature algorithm. See https://ed25519.cr.yp.to/.

These functions are also compatible with the “Ed25519” function defined in RFC 8032.

Index

• Constants
• func GenerateKey(rand io.Reader) (publicKey PublicKey, privateKey PrivateKey, err error)
• func GenerateKeyFromD(d [32]byte) (publicKey PublicKey, privateKey PrivateKey, err error)
• func IsValidPrivateKey(priv PrivateKey) bool
• func Sign(privateKey PrivateKey, message []byte) []byte
• func Verify(publicKey PublicKey, message, sig []byte) bool
• type PrivateKey
  • func HexToPrivateKey(hexstr string) (PrivateKey, error)
  • func (pri PrivateKey) Clear()
  • func (priv PrivateKey) Hex() string
  • func (priv PrivateKey) PubByte() []byte
  • func (priv PrivateKey) Public() crypto.PublicKey
  • func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error)
  • func (priv PrivateKey) ToX25519Sk() []byte
• type PublicKey
  • func HexToPublicKey(hexstr string) (PublicKey, error)
  • func (pub PublicKey) Hex() string
  • func (pub PublicKey) ToX25519Pk() []byte

Constants

const (
	// PublicKeySize is the size, in bytes, of public keys as used in this package.
	PublicKeySize = 32
	// PrivateKeySize is the size, in bytes, of private keys as used in this package.
	PrivateKeySize = 64
	// SignatureSize is the size, in bytes, of signatures generated and verified by this package.
	SignatureSize = 64

	X25519SkSize = 32
)

Functions

func GenerateKey

func GenerateKey(rand io.Reader) (publicKey PublicKey, privateKey PrivateKey, err error)

GenerateKey generates a public/private key pair using entropy from rand. If rand is nil, crypto/rand.Reader will be used.

func GenerateKeyFromD

func GenerateKeyFromD(d [32]byte) (publicKey PublicKey, privateKey PrivateKey, err error)

GenerateKeyFromD generates a public/private key pair using user given Deterministic value called d

func IsValidPrivateKey

func IsValidPrivateKey(priv PrivateKey) bool

func Sign

func Sign(privateKey PrivateKey, message []byte) []byte

Sign signs the message with privateKey and returns a signature. It will panic if len(privateKey) is not PrivateKeySize.

func Verify

func Verify(publicKey PublicKey, message, sig []byte) bool

Verify reports whether sig is a valid signature of message by publicKey. It will panic if len(publicKey) is not PublicKeySize.

Types

type PrivateKey

type PrivateKey []byte

PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer.

func HexToPrivateKey

func HexToPrivateKey(hexstr string) (PrivateKey, error)

func (PrivateKey) Clear

func (pri PrivateKey) Clear()

func (PrivateKey) Hex

func (priv PrivateKey) Hex() string

func (PrivateKey) PubByte

func (priv PrivateKey) PubByte() []byte

Public returns the PublicKey in []byte type corresponding to priv.

func (PrivateKey) Public

func (priv PrivateKey) Public() crypto.PublicKey

Public returns the PublicKey corresponding to priv.

func (PrivateKey) Sign

func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error)

Sign signs the given message with priv. Ed25519 performs two passes over messages to be signed and therefore cannot handle pre-hashed messages. Thus opts.HashFunc() must return zero to indicate the message hasn't been hashed. This can be achieved by passing crypto.Hash(0) as the value for opts.

func (PrivateKey) ToX25519Sk

func (priv PrivateKey) ToX25519Sk() []byte

Public returns the PublicKey in []byte type corresponding to priv.

type PublicKey

type PublicKey []byte

PublicKey is the type of Ed25519 public keys.

func HexToPublicKey

func HexToPublicKey(hexstr string) (PublicKey, error)

func (PublicKey) Hex

func (pub PublicKey) Hex() string

func (PublicKey) ToX25519Pk

func (pub PublicKey) ToX25519Pk() []byte