From 26ae77e8f63111bba3dd4e92ffcaccaa76570927 Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Thu, 29 Jan 2026 17:43:02 +0100
Subject: packed: Use random delta seed

---
 packed_write_pack.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'packed_write_pack.go')

diff --git a/packed_write_pack.go b/packed_write_pack.go
index 0bcaf9ca..42c8793d 100644
--- a/packed_write_pack.go
+++ b/packed_write_pack.go
@@ -1,6 +1,7 @@
 package furgit
 
 import (
+	"crypto/rand"
 	"crypto/sha1"
 	"crypto/sha256"
 	"encoding/binary"
@@ -318,10 +319,15 @@ func (repo *Repository) packWrite(w io.Writer, objects []Hash, opts packWriteOpt
 	}
 
 	var dctx deltaContext
+	var deltaSeed uint32
 	if opts.EnableDeltas {
 		dctx.window = defaultDeltaWindow
+		var seedBytes [4]byte
+		if _, err := rand.Read(seedBytes[:]); err != nil {
+			return Hash{}, err
+		}
+		deltaSeed = binary.LittleEndian.Uint32(seedBytes[:])
 	}
-	deltaSeed := uint32(0)
 
 	for _, id := range objects {
 		ty, body, err := repo.ReadObjectTypeRaw(id)
-- 
cgit v1.3.1-10-gc9f91