mode5

Documentation

Overview

mode5 implements the CRYSTALS-Dilithium signature scheme Dilithium5 as submitted to round3 of the NIST PQC competition and described in

https://pq-crystals.org/dilithium/data/dilithium-specification-round3-20210208.pdf

Index

• Constants
• func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error)
• func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey)
• func SignTo(sk *PrivateKey, msg []byte, signature []byte)
• func Verify(pk *PublicKey, msg []byte, signature []byte) bool
• type PrivateKey
  • func (sk *PrivateKey) Bytes() []byte
  • func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool
  • func (sk *PrivateKey) MarshalBinary() ([]byte, error)
  • func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte)
  • func (sk *PrivateKey) Public() crypto.PublicKey
  • func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) (signature []byte, err error)
  • func (sk *PrivateKey) UnmarshalBinary(data []byte) error
  • func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte)
• type PublicKey
  • func (pk *PublicKey) Bytes() []byte
  • func (pk *PublicKey) Equal(other crypto.PublicKey) bool
  • func (pk *PublicKey) MarshalBinary() ([]byte, error)
  • func (pk *PublicKey) Pack(buf *[PublicKeySize]byte)
  • func (pk *PublicKey) UnmarshalBinary(data []byte) error
  • func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte)

Constants

const (
	// Size of seed for NewKeyFromSeed
	SeedSize = common.SeedSize

	// Size of a packed PublicKey
	PublicKeySize = internal.PublicKeySize

	// Size of a packed PrivateKey
	PrivateKeySize = internal.PrivateKeySize

	// Size of a signature
	SignatureSize = internal.SignatureSize
)

Functions

func GenerateKey

func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error)

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

func NewKeyFromSeed

func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey)

NewKeyFromSeed derives a public/private key pair using the given seed.

func SignTo

func SignTo(sk *PrivateKey, msg []byte, signature []byte)

SignTo signs the given message and writes the signature into signature. It will panic if signature is not of length at least SignatureSize.

func Verify

func Verify(pk *PublicKey, msg []byte, signature []byte) bool

Verify checks whether the given signature by pk on msg is valid.

Types

type PrivateKey

type PrivateKey internal.PrivateKey

PrivateKey is the type of Dilithium5 private key

func (*PrivateKey) Bytes

func (sk *PrivateKey) Bytes() []byte

Packs the private key.

func (*PrivateKey) Equal

func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool

Equal returns whether the two private keys equal.

func (*PrivateKey) MarshalBinary

func (sk *PrivateKey) MarshalBinary() ([]byte, error)

Packs the private key.

func (*PrivateKey) Pack

func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte)

Packs the private key into buf.

func (*PrivateKey) Public

func (sk *PrivateKey) Public() crypto.PublicKey

Computes the public key corresponding to this private key.

Returns a *PublicKey. The type crypto.PublicKey is used to make PrivateKey implement the crypto.Signer interface.

func (*PrivateKey) Sign

func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) (
	signature []byte, err error)

Sign signs the given message.

opts.HashFunc() must return zero, which can be achieved by passing crypto.Hash(0) for opts. rand is ignored. Will only return an error if opts.HashFunc() is non-zero.

This function is used to make PrivateKey implement the crypto.Signer interface. The package-level SignTo function might be more convenient to use.

func (*PrivateKey) UnmarshalBinary

func (sk *PrivateKey) UnmarshalBinary(data []byte) error

Unpacks the private key from data.

func (*PrivateKey) Unpack

func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte)

Sets sk to the private key encoded in buf.

type PublicKey

type PublicKey internal.PublicKey

PublicKey is the type of Dilithium5 public key

func (*PublicKey) Bytes

func (pk *PublicKey) Bytes() []byte

Packs the public key.

func (*PublicKey) Equal

func (pk *PublicKey) Equal(other crypto.PublicKey) bool

Equal returns whether the two public keys equal.

func (*PublicKey) MarshalBinary

func (pk *PublicKey) MarshalBinary() ([]byte, error)

Packs the public key.

func (*PublicKey) Pack

func (pk *PublicKey) Pack(buf *[PublicKeySize]byte)

Packs the public key into buf.

func (*PublicKey) UnmarshalBinary

func (pk *PublicKey) UnmarshalBinary(data []byte) error

Unpacks the public key from data.

func (*PublicKey) Unpack

func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte)

Sets pk to the public key encoded in buf.