push backup

pkg/tools/hash/hash.go

@@ -0,0 +1,23 @@
+package hash
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"io"
+	"os"
+)
+
+func FileMD5(fp string) (string, error) {
+	f, err := os.OpenFile(fp, os.O_RDONLY, 0)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	hasher := md5.New()
+	if _, err := io.Copy(hasher, f); err != nil {
+		return "", err
+	}
+	sum := hasher.Sum(nil)
+	return hex.EncodeToString(sum), nil
+}