mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })

	mode = cipher.NewCBCEncrypter(block, buf)
	mustPanic(t, "crypto/cipher: input not full blocks", func() { mode.CryptBlocks(buf, buf[:3]) })
	mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })
}

	// BlockSize returns the mode's block size.
	BlockSize() int

	// CryptBlocks encrypts or decrypts a number of blocks. The length of
	// src must be a multiple of the block size. Dst and src must overlap
	// entirely or not at all.
	//
	// If len(dst) < len(src), CryptBlocks should panic. It is acceptable
	// to pass a dst bigger than src, and in that case, CryptBlocks will
	// only update dst[:len(src)] and will not touch the rest of dst.
	//

	key      []byte   // key (128, 192 or 256 bits)
	storage  [32]byte // array backing key slice
}

// cryptBlocks invokes the cipher message (KM) instruction with
// the given function code. This is equivalent to AES in ECB
// mode. The length must be a multiple of BlockSize (16).
//
//go:noescape
func cryptBlocks(c code, key, dst, src *byte, length int)

func newCipher(key []byte) (cipher.Block, error) {

		outdata := make([]byte, datalen)

	fuzzencrypt:
		for {
			select {
			case <-timeout.C:
				break fuzzencrypt
			default:
			}

			rand.Read(indata[:])

			cbcGeneric.CryptBlocks(indata, outgeneric)
			cbcAsm.CryptBlocks(indata, outdata)

			if !bytes.Equal(outdata, outgeneric) {
				t.Fatalf("AES-CBC encryption does not match reference result: %x and %x, please report this error to ******@****.***", outdata, outgeneric)

		panic("cipher.NewCBCEncrypter: IV length must equal block size")
	}
	return (*cbcEncrypter)(newCBC(b, iv))
}

func (x *cbcEncrypter) BlockSize() int { return x.blockSize }

func (x *cbcEncrypter) CryptBlocks(dst, src []byte) {
	if len(src)%x.blockSize != 0 {
		panic("crypto/cipher: input not full blocks")
	}
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}

			continue
		}

		encrypter := cipher.NewCBCEncrypter(c, test.iv)

		data := make([]byte, len(test.in))
		copy(data, test.in)

		encrypter.CryptBlocks(data, data)
		if !bytes.Equal(test.out, data) {
			t.Errorf("%s: CBCEncrypter\nhave %x\nwant %x", test.name, data, test.out)
		}
	}
}

func TestCBCDecrypterAES(t *testing.T) {
	for _, test := range cbcAESTests {

	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[:])
	for i := 0; i < b.N; i++ {
		cbc.CryptBlocks(buf, buf)
	}

// with the given function code. The length must be a multiple of BlockSize (16).
//
//go:noescape
func cryptBlocksChain(c code, iv, key, dst, src *byte, length int)

func (x *cbc) CryptBlocks(dst, src []byte) {
	if len(src)%BlockSize != 0 {
		panic("crypto/cipher: input not full blocks")
	}
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}

	if len(ciphertext)%aes.BlockSize != 0 {
		panic("ciphertext is not a multiple of the block size")
	}

	mode := cipher.NewCBCDecrypter(block, iv)

	// CryptBlocks can work in-place if the two arguments are the same.
	mode.CryptBlocks(ciphertext, ciphertext)

	// If the original plaintext lengths are not a multiple of the block
	// size, padding would have to be added when encrypting, which would be

// cryptBlocksChain invokes the cipher message identifying encrypt or decrypt.
//
//go:noescape
func cryptBlocksChain(src, dst *byte, length int, key *uint32, iv *byte, enc int, nr int)

func (x *cbc) CryptBlocks(dst, src []byte) {
	if len(src)%BlockSize != 0 {
		panic("crypto/cipher: input not full blocks")
	}
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}