From 875ac19922932b12f6357d64a460c06d031000e7 Mon Sep 17 00:00:00 2001
From: Jonas Knobloch <jonas.knobloch@t-online.de>
Date: Thu, 23 Apr 2026 18:14:50 +0200
Subject: Add shelf module

---
 shelf/hash.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 shelf/hash.go

(limited to 'shelf/hash.go')

diff --git a/shelf/hash.go b/shelf/hash.go
new file mode 100644
index 0000000..eea81d5
--- /dev/null
+++ b/shelf/hash.go
@@ -0,0 +1,28 @@
+package shelf
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"io"
+	"os"
+)
+
+func hashFile(name string) (string, error) {
+	var file *os.File
+
+	if f, err := os.Open(name); err != nil {
+		return "", err
+	} else {
+		file = f
+	}
+
+	defer file.Close()
+
+	hash := sha256.New()
+
+	if _, err := io.Copy(hash, file); err != nil {
+		return "", err
+	}
+
+	return hex.EncodeToString(hash.Sum(nil)), nil
+}
-- 
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