sm3: add copyResultsBy4 test case

sm3/sm3blocks_test.go

@@ -7,6 +7,7 @@
 package sm3
 
 import (
+	"encoding/binary"
 	"fmt"
 	"testing"
 )
@@ -76,6 +77,28 @@ func TestBlockMultBy4(t *testing.T) {
 	}
 }
 
+func TestCopyResultsBy4(t *testing.T) {
+	var m [4][8]uint32
+	var ret, expected [128]byte
+	var k uint32 = 0
+	for i := 0; i < 4; i++ {
+		for j := 0; j < 8; j++ {
+			m[i][j] = k
+			k++
+			fmt.Printf("%08x ", m[i][j])
+		}
+		fmt.Println()
+	}
+	copyResultsBy4(&m[0][0], &ret[0])
+
+	for i := 0; i < 4; i++ {
+		for j := 0; j < 8; j++ {
+			binary.BigEndian.PutUint32(expected[i*32+j*4:], m[i][j])
+		}
+	}
+	t.Errorf("got %x, expected %x\n", ret[:], expected[:])
+}
+
 func BenchmarkOneBlockBy4(b *testing.B) {
 	digs := initState4()
 	p := createOneBlockBy4()