Documentation
¶
Overview ¶
Package ecdh25519 implements the curve25519 diffie-hellman protocol. See https://cr.yp.to/ecdh.html and https://www.ietf.org/rfc/rfc7748.html.
Index ¶
Examples ¶
Constants ¶
View Source
const ( // PublicKeySize is the size, in bytes, of public keys as used in this package. PublicKeySize = 32 // PrivateKeySize is the size, in bytes, of private keys as used in this package. PrivateKeySize = 32 )
Variables ¶
View Source
var ( ErrBadPrivateKeyLength = errors.New("ecdh25519: bad private key length") ErrBadPublicKeyLength = errors.New("ecdh25519: bad public key length") )
Functions ¶
func GenerateKeyPair ¶
func GenerateKeyPair(rand io.Reader) (PublicKey, PrivateKey, error)
GenerateKeyPair generates a public/private key pair using entropy from rand. If rand is nil, crypto/rand.Reader will be used.
Example ¶
package main
import (
"bytes"
"crypto/rand"
"fmt"
"github.com/adnsio/ecdh/ecdh25519"
)
func main() {
alicePublicKey, alicePrivateKey, err := ecdh25519.GenerateKeyPair(rand.Reader)
if err != nil {
panic(err)
}
bobPublicKey, bobPrivateKey, err := ecdh25519.GenerateKeyPair(rand.Reader)
if err != nil {
panic(err)
}
aliceSharedSecret, err := ecdh25519.GenerateSharedSecret(alicePrivateKey, bobPublicKey)
if err != nil {
panic(err)
}
bobSharedSecret, err := ecdh25519.GenerateSharedSecret(bobPrivateKey, alicePublicKey)
if err != nil {
panic(err)
}
if bytes.Equal(aliceSharedSecret, bobSharedSecret) {
fmt.Printf("shared secrets are equal")
}
}
Output: shared secrets are equal
func GenerateSharedSecret ¶
func GenerateSharedSecret(privateKey PrivateKey, publicKey PublicKey) ([]byte, error)
GenerateSharedSecret generates a shared secret by using someone else's public key.
Types ¶
type PrivateKey ¶
type PrivateKey []byte
PrivateKey is the type of ecdh25519 private keys.
func (PrivateKey) PublicKey ¶
func (p PrivateKey) PublicKey() (PublicKey, error)
PublicKey returns the PublicKey corresponding to the PrivateKey.
Source Files
Click to show internal directories.
Click to hide internal directories.