}
func testBlock(t *testing.T, name string, newCipher func(cipher.Block, []byte) cipher.Stream) {
	// This cipherText is encrypted "0123456789"
	cipherText := []byte{86, 216, 121, 231, 219, 191, 26, 12, 176, 117}
	var iv, key [16]byte
	block, err := aes.NewCipher(key[:])
	if err != nil {
		panic(err)
	}
	stream := newCipher(block, iv[:])
	test(t, name, cipherText, stream.XORKeyStream)
}

        try {
            Cipher newCipher = Cipher.getInstance(transformation);
            newCipher.init(Cipher.ENCRYPT_MODE, key);
            if (initVectorLength > 0) {
                assert collector != null;
                byte[] iv = newCipher.getIV();
                assert iv != null;
                collector.collect(iv);
            }
            return newCipher;

	// NewCipher calls. (Obviously don't use this example key for anything
	// real.) If you want to convert a passphrase to a key, use a suitable
	// package like bcrypt or scrypt.
	key, _ := hex.DecodeString("6368616e676520746869732070617373")
	ciphertext, _ := hex.DecodeString("73c86d43a9d700a253a96c85b0f6b03ac9792e0e757f869cca306bd3cba1c62b")

	block, err := aes.NewCipher(key)
	if err != nil {
		panic(err)
	}

	aes16block, err := aes.NewCipher(bytes.Repeat([]byte("a"), 16))
	if err != nil {
		t.Fatal(err)
	}
	aes24block, err := aes.NewCipher(bytes.Repeat([]byte("b"), 24))
	if err != nil {
		t.Fatal(err)
	}
	key32 := bytes.Repeat([]byte("c"), 32)
	aes32block, err := aes.NewCipher(key32)
	if err != nil {
		t.Fatal(err)
	}

	ctx := context.Background()

			}
		}
	}
}

func TestBlock(t *testing.T) {
	c1a, _ := NewCipher(golden[0].key)
	c1b, _ := NewCipher(golden[1].key)
	data1 := make([]byte, 1<<20)
	for i := range data1 {
		c1a.XORKeyStream(data1[i:i+1], data1[i:i+1])
		c1b.XORKeyStream(data1[i:i+1], data1[i:i+1])
	}

	c2a, _ := NewCipher(golden[0].key)
	c2b, _ := NewCipher(golden[1].key)
	data2 := make([]byte, 1<<20)
	c2a.XORKeyStream(data2, data2)

	},
}

// Test Cipher Encrypt method against FIPS 197 examples.
func TestCipherEncrypt(t *testing.T) {
	for i, tt := range encryptTests {
		c, err := NewCipher(tt.key)
		if err != nil {
			t.Errorf("NewCipher(%d bytes) = %s", len(tt.key), err)
			continue
		}
		out := make([]byte, len(tt.in))
		c.Encrypt(out, tt.in)
		for j, v := range out {
			if v != tt.out[j] {

type KeySizeError int

func (k KeySizeError) Error() string {
	return "crypto/aes: invalid key size " + strconv.Itoa(int(k))
}

// NewCipher creates and returns a new [cipher.Block].
// The key argument should be the AES key,
// either 16, 24, or 32 bytes to select
// AES-128, AES-192, or AES-256.
func NewCipher(key []byte) (cipher.Block, error) {
	k := len(key)
	switch k {
	default:
		return nil, KeySizeError(k)
	case 16, 24, 32:

package aes

import (
	"crypto/cipher"
)

// newCipher calls the newCipherGeneric function
// directly. Platforms with hardware accelerated
// implementations of AES should implement their
// own version of newCipher (which may then call
// newCipherGeneric if needed).
func newCipher(key []byte) (cipher.Block, error) {
	return newCipherGeneric(key)
}

	var key [16]byte
	var iv [16]byte
	aes, _ := aes.NewCipher(key[:])
	cbc := cipher.NewCBCEncrypter(aes, iv[:])
	for i := 0; i < b.N; i++ {
		cbc.CryptBlocks(buf, buf)
	}
}

func BenchmarkAESCBCDecrypt1K(b *testing.B) {
	buf := make([]byte, 1024)
	b.SetBytes(int64(len(buf)))

	var key [16]byte
	var iv [16]byte
	aes, _ := aes.NewCipher(key[:])
	cbc := cipher.NewCBCDecrypter(aes, iv[:])

		} else if err != msg {
			t.Errorf("got panic %v, wanted %q", err, msg)
		}
	}()
	f()
}

func TestEmptyPlaintext(t *testing.T) {
	var key [16]byte
	a, err := aes.NewCipher(key[:16])
	if err != nil {
		t.Fatal(err)
	}
	d, err := des.NewCipher(key[:8])
	if err != nil {
		t.Fatal(err)
	}

	s := 16
	pt := make([]byte, s)
	ct := make([]byte, s)
	for i := 0; i < 16; i++ {
		pt[i], ct[i] = byte(i), byte(i)