add digest.clone method and use it in Sum

2024-10-05 20:16:35 -07:00 · 2024-10-05 20:16:35 -07:00 · b64eff8ecd
parent d6e555a97c
commit b64eff8ecd
1 changed files with 7 additions and 2 deletions
--- a/sponge.go
+++ b/sponge.go
@ -68,8 +68,13 @@ func keccakf(a *[25]uint64) {
 	}
 }

-func (d0 *digest) Sum(b []byte) []byte {
-	d := *d0
+func (d *digest) clone() *digest {
+	d0 := *d
+	return &d0
+}
+
+func (d *digest) Sum(b []byte) []byte {
+	d = d.clone()
 	d.buf[d.len] = d.dsbyte
 	bs := d.BlockSize()
 	for i := d.len + 1; i < bs; i++ {