imrpove log outputs

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

pkg/crypto/types.go

@@ -32,8 +32,8 @@ type KeyPair struct {
 }
 
 type PublicKeyPair struct {
-	Ours   Key
-	Theirs Key
+	Ours   Key `json:"ours"`
+	Theirs Key `json:"theirs"`
 }
 
 func GeneratePrivateKey() (Key, error) {
@@ -102,6 +102,10 @@ func (k Key) IsSet() bool {
 	return k != Key{}
 }
 
+func (k Signature) String() string {
+	return base64.StdEncoding.EncodeToString(k[:])
+}
+
 func (kp PublicKeyPair) ID(key []byte) string {
 	ctx := hmac.New(hash.SHA512.CryptoHash().HashFunc().New, key)