ecdh

package

v0.0.0-...-c8afd98 Latest Latest Go to latest Published: Feb 16, 2022 License: Apache-2.0 Imports: 6 Imported by: 0

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Repository

github.com/tybalex/opni-monitoring

Documentation ¶

Index ¶

Variables
func DeriveSharedSecret(ours EphemeralKeyPair, theirs PeerPublicKey) ([]byte, error)
type EphemeralKeyPair
- func NewEphemeralKeyPair() EphemeralKeyPair
type PeerPublicKey
type PeerType

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	ErrInvalidPeerType = errors.New("invalid peer type")
)

Functions ¶

func DeriveSharedSecret ¶

func DeriveSharedSecret(ours EphemeralKeyPair, theirs PeerPublicKey) ([]byte, error)

Derives a 64-byte shared secret given one party's ephemeral keypair and another party's ephemeral public key obtained from ECDH.

The secret is computed using the following KDF (similar to libsodium):

blake2b-512(q || client-pub || server-pub).

where q is the 32-byte x25519 shared secret.

The client and server's public keys must be ordered the same way on both sides, so the peer's type (client or server) must be provided along with the peer's public key.

Types ¶

type EphemeralKeyPair ¶

type EphemeralKeyPair struct {
	PrivateKey []byte
	PublicKey  []byte
}

func NewEphemeralKeyPair ¶

func NewEphemeralKeyPair() EphemeralKeyPair

Creates a new x25519 keypair for use in ECDH key exchange.

type PeerPublicKey ¶

type PeerPublicKey struct {
	PublicKey []byte
	PeerType  PeerType
}

type PeerType ¶

type PeerType int

const (
	PeerTypeClient PeerType = iota
	PeerTypeServer
)

Source Files ¶

View all Source files

ecdh.go

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