From 184f44dd00b6b82ce2b684d95772538bf206d8a3 Mon Sep 17 00:00:00 2001
From: David Florness <david@florness.com>
Date: Sat, 27 Mar 2021 17:25:17 -0400
Subject: [PATCH] Don't allow zero for inputs

---
 election/msg.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/election/msg.go b/election/msg.go
index 918a3f2..bff3d4e 100644
--- a/election/msg.go
+++ b/election/msg.go
@@ -243,6 +243,12 @@ func (elections *ElectionsMap) onJoinElectionMessage(evt *event.Event) (success
 	}
 	input := new(big.Int).SetBytes(bytes)
 
+	// zero is not allowed
+	if input.Cmp(new(big.Int)) == 0 {
+		warnf("their input is zero")
+		return
+	}
+
 	bytes, err = base64.StdEncoding.DecodeString(content.PubKey)
 	if err != nil {
 		warnf("we couldn't decode their public key: %s", err)
-- 
2.38.4