Total rework HAP pkg and HomeKit source

pkg/hap/ed25519/ed25519.go

@@ -0,0 +1,24 @@
+package ed25519
+
+import (
+	"crypto/ed25519"
+	"errors"
+)
+
+var ErrInvalidParams = errors.New("ed25519: invalid params")
+
+func ValidateSignature(key, data, signature []byte) bool {
+	if len(key) != ed25519.PublicKeySize || len(signature) != ed25519.SignatureSize {
+		return false
+	}
+
+	return ed25519.Verify(key, data, signature)
+}
+
+func Signature(key, data []byte) ([]byte, error) {
+	if len(key) != ed25519.PrivateKeySize {
+		return nil, ErrInvalidParams
+	}
+
+	return ed25519.Sign(key, data), nil
+}