From fce31e6e8783cabf68111d9b2c60b00949846a51 Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rosehogenson@posteo.net>
Date: Fri, 21 Nov 2025 21:50:21 -0800
Subject: Slightly simplify the int encoding

---
 roseh.moe.go | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/roseh.moe.go b/roseh.moe.go
index a2e7ed2..687fe4c 100644
--- a/roseh.moe.go
+++ b/roseh.moe.go
@@ -338,14 +338,9 @@ func verify(msg, messageMAC []byte, purpose string) bool {
 }
 
 func marshalInt(x int64) []byte {
-	ux := uint64(x) << 1
-	if x < 0 {
-		ux = ^ux
-	}
 	buf := make([]byte, 8)
-	binary.BigEndian.PutUint64(buf, ux)
-	for len(buf) > 0 && buf[0] == 0 {
-		buf = buf[1:]
+	binary.BigEndian.PutUint64(buf, uint64(x))
+	for ; len(buf) > 0 && buf[0] == 0; buf = buf[1:] {
 	}
 	return buf
 }
@@ -356,15 +351,10 @@ func unmarshalInt(b []byte) (int64, bool) {
 	}
 	buf := make([]byte, 8)
 	copy(buf[8-len(b):], b)
-	ux := binary.BigEndian.Uint64(buf)
-	x := int64(ux >> 1)
-	if ux&1 != 0 {
-		x = ^x
-	}
-	return x, true
+	return int64(binary.BigEndian.Uint64(buf)), true
 }
 
-const yearOffset = 2089
+const yearOffset = 2025
 
 func marshalTime(t time.Time) []byte {
 	year, month, day := t.UTC().Date()
-- 
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