From 6256b6ef339196bc4a60e6c601c29f6e0fc7688e Mon Sep 17 00:00:00 2001
From: Christoph Hagen <github@christophhagen.de>
Date: Sat, 10 Feb 2024 11:32:16 +0100
Subject: [PATCH] Improve crypto primitives

---
 include/relay/CryptoPrimitives.h | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/relay/CryptoPrimitives.h b/include/relay/CryptoPrimitives.h
index 0af5bbb..278645a 100644
--- a/include/relay/CryptoPrimitives.h
+++ b/include/relay/CryptoPrimitives.h
@@ -10,10 +10,18 @@
 struct PrivateKey {
 
     /// @brief The size of a private key
-    static const int size = 32;
+    static constexpr int size = 32;
 
     uint8_t bytes[size];
 
+    bool isUnset() {
+        for (uint8_t i = 0; i < size; i += 1) {
+            if (bytes[i] != 0) {
+                return false;
+            }
+        }
+        return true;
+    }
 };
 
 /**
@@ -22,10 +30,18 @@ struct PrivateKey {
 struct PublicKey {
 
     /// @brief The size of a public key
-    static const int size = 32;
+    static constexpr int size = 32;
 
     uint8_t bytes[size];
 
+    bool isUnset() {
+        for (uint8_t i = 0; i < size; i += 1) {
+            if (bytes[i] != 0) {
+                return false;
+            }
+        }
+        return true;
+    }
 };
 
 /**
@@ -34,7 +50,7 @@ struct PublicKey {
 struct Signature {
 
     /// @brief The size of a message signature
-    static const int size = 64;
+    static constexpr int size = 64;
 
     uint8_t bytes[size];