nyquist

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

type DHConfig struct {
	// LocalStatic is the local static keypair, if any (`s`).
	LocalStatic dh.Keypair

	// LocalEphemeral is the local ephemeral keypair, if any (`e`).
	LocalEphemeral dh.Keypair

	// RemoteStatic is the remote static public key, if any (`rs`).
	RemoteStatic dh.PublicKey

	// RemoteEphemeral is the remote ephemeral public key, if any (`re`).
	RemoteEphemeral dh.PublicKey

	// Observer is the optional handshake observer.
	Observer HandshakeObserverDH
}

type DHStatus struct {
	// LocalEphemeral is the local ephemeral public key, if any (`e`).
	LocalEphemeral dh.PublicKey

	// RemoteStatic is the remote static public key, if any (`rs`).
	RemoteStatic dh.PublicKey

	// RemoteEphemeral is the remote ephemeral public key, if any (`re`).
	RemoteEphemeral dh.PublicKey
}

type HandshakeConfig struct {
	// Protocol is the noise protocol to use for this handshake.
	Protocol *Protocol

	// Prologue is the optional pre-handshake prologue input to be included
	// in the handshake hash.
	Prologue []byte

	// DH is the Diffie-Hellman keys for this handshake.
	DH *DHConfig

	// KEM is the Key Encapsulation Mechanism keys for this handshake.
	KEM *KEMConfig

	// PreSharedKeys is the vector of pre-shared symmetric key for PSK mode
	// handshakes.
	PreSharedKeys [][]byte

	// Rng is the entropy source to be used when entropy is required.
	// If the value is `nil`, `crypto/rand.Reader` will be used.
	Rng io.Reader

	// MaxMessageSize specifies the maximum Noise message size the handshake
	// and session will process or generate.  If the value is `0`,
	// `DefaultMaxMessageSize` will be used.  A negative value will disable
	// the maximum message size enforcement entirely.
	//
	// Warning: Values other than the default is a non-standard extension
	// to the protocol.
	MaxMessageSize int

	// IsInitiator should be set to true if this handshake is in the
	// initiator role.
	IsInitiator bool
}

type HandshakeObserverDH interface {
	// OnPeerPublicKey will be called when a public key is received from
	// the peer, with the handshake pattern token (`pattern.Token_e`,
	// `pattern.Token_s`) and public key.
	//
	// Returning a non-nil error will abort the handshake immediately.
	OnPeerPublicKey(pattern.Token, dh.PublicKey) error
}

type HandshakeObserverKEM interface {
	// OnPeerPublicKey will be called when a public key is received from
	// the peer, with the handshake pattern token (`pattern.Token_e`,
	// `pattern.Token_s`) and public key.
	//
	// Returning a non-nil error will abort the handshake immediately.
	OnPeerPublicKey(pattern.Token, kem.PublicKey) error
}

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

type HandshakeStatus struct {
	// Err is the error representing the status of the handshake.
	//
	// It will be `nil` if the handshake is in progess, `ErrDone` if the
	// handshake is complete, and any other error if the handshake has failed.
	Err error

	// DH is the Diffie-Hellman public keys of the handshake.
	DH *DHStatus

	// KEM is the Key Encapsulation Mechanism public keys of the handshake.
	KEM *KEMStatus

	// CipherStates is the resulting CipherState pair (`(cs1, cs2)`).
	//
	// Note: To prevent misuse, for one-way patterns `cs2` will be nil.
	CipherStates []*CipherState

	// HandshakeHash is the handshake hash (`h`).  This field is only set
	// once the handshake is completed.
	HandshakeHash []byte
}

type KEMConfig struct {
	// LocalStatic is the local static keypair, if any (`s`).
	LocalStatic kem.PrivateKey

	// LocalEphemeral is the local ephemeral keypair, if any (`e`).
	LocalEphemeral kem.PrivateKey

	// RemoteStatic is the remote static public key, if any (`rs`).
	RemoteStatic kem.PublicKey

	// RemoteEphemeral is the remote ephemeral public key, if any (`re`).
	RemoteEphemeral kem.PublicKey

	// Observer is the optional handshake observer.
	Observer HandshakeObserverKEM

	// GenKey is the SEEC GenKey instance to be used to generate
	// entropy for a KEM scheme when required.  If the value is `nil`,
	// `seec.GenKeyPassthrough` will be used.
	GenKey seec.GenKey
}

type KEMStatus struct {
	// LocalEphemeral is the local ephemeral public key, if any (`e`).
	LocalEphemeral kem.PublicKey

	// RemoteStatic is the remote static public key, if any (`rs`).
	RemoteStatic kem.PublicKey

	// RemoteEphemeral is the remote ephemeral public key, if any (`re`).
	RemoteEphemeral kem.PublicKey
}

type Protocol struct {
	Pattern pattern.Pattern

	DH  dh.DH
	KEM kem.Scheme

	Cipher cipher.Cipher
	Hash   hash.Hash
}

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