From 92ab9170be13e860a286efd10748dd28a6fc6f57 Mon Sep 17 00:00:00 2001
From: David Florness <david@florness.com>
Date: Mon, 14 Mar 2022 22:19:27 -0400
Subject: [PATCH] Close files used in marshalling

---
 election/marshal.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/election/marshal.go b/election/marshal.go
index ea3acce..894f87d 100644
--- a/election/marshal.go
+++ b/election/marshal.go
@@ -30,6 +30,7 @@ func NewProvingKeyFile(fileID string, pk groth16.ProvingKey) *ProvingKeyFile {
 		log.Errorf("couldn't open file %s; this proving key will be discarded upon exit: %s", filePath, err)
 		return &ProvingKeyFile{"", pk}
 	}
+	defer file.Close()
 	_, err = pk.WriteTo(file)
 	if err != nil {
 		log.Errorf("couldn't write proving key to file %s; this proving will be discarded upon exit: %s", filePath, err)
@@ -52,6 +53,7 @@ func (provingKey *ProvingKeyFile) Pk() groth16.ProvingKey {
 		log.Errorf("couldn't open proving key file %s: %s", filePath, err)
 		return nil
 	}
+	defer file.Close()
 	pk := groth16.NewProvingKey(ecc.BLS12_381)
 	_, err = pk.ReadFrom(file)
 	if err != nil {
@@ -76,6 +78,7 @@ func NewVerifyingKeyFile(vk groth16.VerifyingKey) *VerifyingKeyFile {
 		log.Errorf("couldn't open file %s; this verifying key will be discarded upon exit: %s", filePath, err)
 		return &VerifyingKeyFile{"", vk}
 	}
+	defer file.Close()
 	_, err = vk.WriteTo(file)
 	if err != nil {
 		log.Errorf("couldn't write verifying key to file %s; this proving will be discarded upon exit: %s", filePath, err)
@@ -98,6 +101,7 @@ func (verifyingKey *VerifyingKeyFile) Vk() groth16.VerifyingKey {
 		log.Errorf("couldn't open verifying key file %s: %s", filePath, err)
 		return nil
 	}
+	defer file.Close()
 	vk := groth16.NewVerifyingKey(ecc.BLS12_381)
 	_, err = vk.ReadFrom(file)
 	if err != nil {
-- 
2.38.4