root

Documentation

Overview

Package root provides root keys which are used to derive new chain and root keys in a ratcheting session.

Index

• Constants
• type Key
  • func NewKey(kdf kdf.HKDF, key []byte) *Key
  • func (k *Key) Bytes() []byte
  • func (k *Key) CreateChain(theirRatchetKey ecc.ECPublicKeyable, ourRatchetKey *ecc.ECKeyPair) (*session.KeyPair, error)

Constants

const DerivedSecretsSize = 64

DerivedSecretsSize is the size of the derived secrets for root keys.

const KdfInfo string = "WhisperRatchet"

KdfInfo is used as the info for message keys to derive secrets using a Key Derivation Function

Types

type Key

type Key struct {
	// contains filtered or unexported fields
}

Key is a structure for RootKeys, which are used to derive a new set of chain and root keys for every round trip of messages.

func NewKey

func NewKey(kdf kdf.HKDF, key []byte) *Key

NewKey returns a new RootKey given the key derivation function and bytes.

func (*Key) Bytes

func (k *Key) Bytes() []byte

Bytes returns the RootKey in bytes.

func (*Key) CreateChain

func (k *Key) CreateChain(theirRatchetKey ecc.ECPublicKeyable, ourRatchetKey *ecc.ECKeyPair) (*session.KeyPair, error)

CreateChain creates a new RootKey and ChainKey from the recipient's ratchet key and our private key.