signature

Documentation

Index

• Constants
• Variables
• func SignData(key *ecdsa.PrivateKey, src DataSource, opts ...SignOption) (res *signature.Signature, err error)
• func SignDataWithHandler(key *ecdsa.PrivateKey, src DataSource, handler func(key, sig []byte)) error
• func VerifyData(dataSrc DataSource, sig *signature.Signature, opts ...SignOption) error
• func VerifyDataWithSource(dataSrc DataSource, sigSrc func() (key, sig []byte)) error
• type DataSource
• type DataWithSignature
• type SignOption
  • func SignWithRFC6979() SignOption

Constants

const (
	// PrivateKeyCompressedSize is constant with compressed size of private key (SK).
	// D coordinate stored, recover PK by formula x, y = curve.ScalarBaseMul(d,bytes).
	PrivateKeyCompressedSize = 32

	// PublicKeyCompressedSize is constant with compressed size of public key (PK).
	PublicKeyCompressedSize = 33

	// PublicKeyUncompressedSize is constant with uncompressed size of public key (PK).
	// First byte always should be 0x4 other 64 bytes is X and Y (32 bytes per coordinate).
	// 2 * 32 + 1.
	PublicKeyUncompressedSize = 65
)

Variables

var (
	// ErrEmptyPrivateKey is returned when used private key is empty.
	ErrEmptyPrivateKey = errors.New("empty private key")
	// ErrInvalidPublicKey is returned when public key cannot be unmarshalled.
	ErrInvalidPublicKey = errors.New("invalid public key")
	// ErrInvalidSignature is returned if signature cannot be verified.
	ErrInvalidSignature = errors.New("invalid signature")
)

Functions

func SignData

func SignData(key *ecdsa.PrivateKey, src DataSource, opts ...SignOption) (res *signature.Signature, err error)

func SignDataWithHandler

func SignDataWithHandler(key *ecdsa.PrivateKey, src DataSource, handler func(key, sig []byte)) error

func VerifyData

func VerifyData(dataSrc DataSource, sig *signature.Signature, opts ...SignOption) error

func VerifyDataWithSource

func VerifyDataWithSource(dataSrc DataSource, sigSrc func() (key, sig []byte)) error

Types

type DataSource

type DataSource interface {
	ReadSignedData([]byte) ([]byte, error)
	SignedDataSize() int
}

type DataWithSignature

type DataWithSignature interface {
	DataSource
	GetSignature() *signature.Signature
	SetSignature(*signature.Signature)
}

type SignOption

type SignOption func(*cfg)

func SignWithRFC6979

func SignWithRFC6979() SignOption