%#x", j, i, x, w) } w = w<<24 | w>>8 } } } // Test that decryption tables are correct. // (Can adapt this code to generate them too.) func TestTd(t *testing.T) { for i := 0; i < 256; i++ { s := uint32(sbox1[i]) s9 := mul(s, 0x9) sb := mul(s, 0xb) sd := mul(s, 0xd) se := mul(s, 0xe) w := se<<24 | s9<<16 | sd<<8 | sb td := [][256]uint32{td0, td1, td2, td3} for j := 0; j < 4; j++ { if x := td[j][i]; x != w { t.Fatalf("td[%d][%d] = %#x, want %#x", j, i, x, w) } w = w<<24 | w>>8 } } } golang.org/fips140@v...