/**
 * This annotation is a marker and guarantees all integration tests are tagged.
 *
 * When we use JUnit Platform `includeTags('SomeTag')`, all spock tests are excluded:
 * https://github.com/spockframework/spock/issues/1288 . As a workaround,
 * we tag all non-spock integration tests and use `includeTags(none() | SomeTag)` to make
 * sure spock engine tests are executed.
 */
@Retention(RetentionPolicy.RUNTIME)

	// This avoids an unnecessary allocation of the aesCipher struct.
	c := aesCipherGCM{aesCipherAsm{aesCipher{l: uint8(len(key) + 28)}}}
	var rounds int
	switch len(key) {
	case 128 / 8:
		rounds = 10
	case 192 / 8:
		rounds = 12
	case 256 / 8:
		rounds = 14
	default:
		return nil, KeySizeError(len(key))
	}

	expandKeyAsm(rounds, &key[0], &c.enc[0], &c.dec[0])

	if !(cpu.S390X.HasAES && cpu.S390X.HasAESCBC && cpu.S390X.HasAESCTR && (cpu.S390X.HasGHASH || cpu.S390X.HasAESGCM)) {
		return newCipherGeneric(key)
	}

	var function code
	switch len(key) {
	case 128 / 8:
		function = aes128
	case 192 / 8:
		function = aes192
	case 256 / 8:
		function = aes256
	default:
		return nil, KeySizeError(len(key))
	}

	var c aesCipherAsm
	c.function = function

00000030  16 03 02 00 40 00 00 00  00 00 00 00 00 00 00 00  |....@...........|
00000040  00 00 00 00 00 34 fa 43  0a 6f 38 d0 80 5d a1 d6  |.....4.C.o8..]..|
00000050  61 c9 62 a9 b2 14 88 b4  7d b9 dc 20 93 11 27 37  |a.b.....}.. ..'7|
00000060  5a 2a 5b d4 10 54 75 23  8d 39 4a 5b 51 80 48 f2  |Z*[..Tu#.9J[Q.H.|
00000070  16 64 e5 90 38                                    |.d..8|
>>> Flow 4 (server to client)

00000230  b6 4f 0a bc 2f aa af f9  c4 d7 1b 8e c7 58 f1 dc  |.O../........X..|
00000240  84 57 f4 9c 3f 40 e5 27  49 9c 4c a9 98 1b 9a b3  |.W..?@.'I.L.....|
00000250  95 83 7e 32 b7 d8 25 85  4d bf fd 14 88 c0 f7 1c  |..~2..%.M.......|
00000260  e2 cb 46 b3 4a 39 80 fa  08 b3 c2 18 05 dd 82 e4  |..F.J9..........|
00000270  68 5f 72 b5 53 a8 1b e7  7c 79 64 9a 3f 63 d3 50  |h_r.S...|yd.?c.P|