internal/gost34112012/hash.go | 19 +++++++++----------

diff --git a/internal/gost34112012/hash.go b/internal/gost34112012/hash.go
index 79ac513027f5c86ad0baf1b8af3005a1779b042a4dd48c59adc38467cca3965b..b17397f38408986b2f5bcd61289dc3fa11614974e44bfb07d36d7984a03c6697 100644
--- a/internal/gost34112012/hash.go
+++ b/internal/gost34112012/hash.go
@@ -431,16 +431,15 @@ }
 
 func l(out, data []byte) []byte {
 	for i := 0; i < 8; i++ {
-		res64 := uint64(0)
-		res64 ^= cache[0][data[8*i+0]]
-		res64 ^= cache[1][data[8*i+1]]
-		res64 ^= cache[2][data[8*i+2]]
-		res64 ^= cache[3][data[8*i+3]]
-		res64 ^= cache[4][data[8*i+4]]
-		res64 ^= cache[5][data[8*i+5]]
-		res64 ^= cache[6][data[8*i+6]]
-		res64 ^= cache[7][data[8*i+7]]
-		binary.LittleEndian.PutUint64(out[i*8:i*8+8], res64)
+		binary.LittleEndian.PutUint64(out[i*8:i*8+8],
+			cache[0][data[8*i+0]]^
+				cache[1][data[8*i+1]]^
+				cache[2][data[8*i+2]]^
+				cache[3][data[8*i+3]]^
+				cache[4][data[8*i+4]]^
+				cache[5][data[8*i+5]]^
+				cache[6][data[8*i+6]]^
+				cache[7][data[8*i+7]])
 	}
 	return out
 }