Add shelf module

1 files changed, 28 insertions, 0 deletions

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
+}