Beginning work noise handshake

src/noise_types.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"encoding/hex"
+	"errors"
+)
+
+const (
+	NoisePublicKeySize    = 32
+	NoisePrivateKeySize   = 32
+	NoiseSymmetricKeySize = 32
+)
+
+type (
+	NoisePublicKey  [NoisePublicKeySize]byte
+	NoisePrivateKey [NoisePrivateKeySize]byte
+)
+
+func loadExactHex(dst []byte, src string) error {
+	slice, err := hex.DecodeString(src)
+	if err != nil {
+		return err
+	}
+	if len(slice) != len(dst) {
+		return errors.New("Hex string does not fit the slice")
+	}
+	copy(dst, slice)
+	return nil
+}
+
+func (key *NoisePrivateKey) FromHex(src string) error {
+	return loadExactHex(key[:], src)
+}
+
+func (key NoisePrivateKey) ToHex() string {
+	return hex.EncodeToString(key[:])
+}
+
+func (key *NoisePublicKey) FromHex(src string) error {
+	return loadExactHex(key[:], src)
+}
+
+func (key NoisePublicKey) ToHex() string {
+	return hex.EncodeToString(key[:])
+}
+
+func (key *NoiseSymmetricKey) FromHex(src string) error {
+	return loadExactHex(key[:], src)
+}
+
+func (key NoiseSymmetricKey) ToHex() string {
+	return hex.EncodeToString(key[:])
+}