eddsa

Documentation

Index

• func Verify(public abstract.Point, msg, sig []byte) error
• type EdDSA
  • func NewEdDSA(stream cipher.Stream) *EdDSA
  • func (e *EdDSA) MarshalBinary() ([]byte, error)
  • func (e *EdDSA) Prefix() []byte
  • func (e *EdDSA) Sign(msg []byte) ([]byte, error)
  • func (e *EdDSA) UnmarshalBinary(buff []byte) error

Functions

func Verify

func Verify(public abstract.Point, msg, sig []byte) error

Verify takes a signature issued by EdDSA.Sign and return nil if it is a valid signature, or an error otherwise Takes:

• public key used in signing
• msg is the message to sign
• sig is the signature return by EdDSA.Sign

Types

type EdDSA

type EdDSA struct {

	// Secret being already hashed + bit tweaked
	Secret abstract.Scalar
	// Public is the corresponding public key
	Public abstract.Point
	// contains filtered or unexported fields
}

EdDSA implements the EdDSA signature algorithm according to the RFC https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-02

func NewEdDSA

func NewEdDSA(stream cipher.Stream) *EdDSA

NewEdDSA will return a freshly generated key pair to use for generating EdDSA signatures. If stream == nil, it will take the random.Stream.

func (*EdDSA) MarshalBinary

func (e *EdDSA) MarshalBinary() ([]byte, error)

MarshalBinary will return the representation used by the reference implementation of SUPERCOP ref10 Namely seed || Public

func (*EdDSA) Prefix

func (e *EdDSA) Prefix() []byte

Prefix returns the Prefix as being the right part of the hashed seed

func (*EdDSA) Sign

func (e *EdDSA) Sign(msg []byte) ([]byte, error)

Sign will return a EdDSA signature of the message msg using Ed25519. NOTE: Code taken from the Python implementation from the RFC https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-02

func (*EdDSA) UnmarshalBinary

func (e *EdDSA) UnmarshalBinary(buff []byte) error

UnmarshalBinary transforms a slice of bytes into a EdDSA signature