NonceSize = 12

	// NonceSizeX is the size of the nonce used with the XChaCha20 variant of
	// this cipher, in bytes.
	NonceSizeX = 24
)

// Cipher is a stateful instance of ChaCha20 or XChaCha20 using a particular key
// and nonce. A *Cipher implements the cipher.Stream interface.
type Cipher struct {
	// The ChaCha20 state is 16 words: 4 constant, 8 of key, 1 of counter
	// (incremented after each block), and 3 of nonce.

func counterCryptASM(nr int, out, in []byte, counter *[gcmBlockSize]byte, key *uint32)

// NewGCM returns the AES cipher wrapped in Galois Counter Mode. This is only
// called by [crypto/cipher.NewGCM] via the gcmAble interface.
func (c *aesCipherAsm) NewGCM(nonceSize, tagSize int) (cipher.AEAD, error) {
	var h1, h2 uint64
	g := &gcmAsm{cipher: c, ks: c.enc[:c.l], nonceSize: nonceSize, tagSize: tagSize}

	hle := make([]byte, gcmBlockSize)

//
#define CIPHER_BLOCK(Vin, Vxor, Vout, vcipher, vciphel, label10, label12) \
	VXOR	Vin, Vxor, Vout \
	BEQ	CR1, label10 \
	BEQ	CR2, label12 \
	vcipher	Vout, V7, Vout \
	vcipher	Vout, V8, Vout \
	label12: \
	vcipher	Vout, V9, Vout \
	vcipher	Vout, V10, Vout \
	label10: \
	vcipher	Vout, V11, Vout \
	vcipher	Vout, V12, Vout \
	vcipher	Vout, V13, Vout \
	vcipher	Vout, V14, Vout \
	vcipher	Vout, V15, Vout \

		tagSize := (len(test.result) - len(test.plaintext)) / 2

		var aesgcm cipher.AEAD
		switch {
		// Handle non-standard tag sizes
		case tagSize != 16:
			aesgcm, err = cipher.NewGCMWithTagSize(aes, tagSize)
			if err != nil {
				t.Fatal(err)
			}

		// Handle 0 nonce size (expect error and continue)
		case len(nonce) == 0:
			aesgcm, err = cipher.NewGCMWithNonceSize(aes, 0)
			if err == nil {

)

var errOpen = errors.New("cipher: message authentication failed")

// Assert that aesCipherGCM implements the gcmAble interface.
var _ gcmAble = (*aesCipherGCM)(nil)

// NewGCM returns the AES cipher wrapped in Galois Counter Mode. This is only
// called by [crypto/cipher.NewGCM] via the gcmAble interface.
func (c *aesCipherGCM) NewGCM(nonceSize, tagSize int) (cipher.AEAD, error) {

	for _, cipher := range tls.InsecureCipherSuites() {
		acceptedCiphers[cipher.Name] = cipher.ID
	}
	for _, cipher := range tls.CipherSuites() {
		acceptedCiphers[cipher.Name] = cipher.ID
	}
	return acceptedCiphers
}

// TLSCipherSuites returns a list of cipher suite IDs from the cipher suite names passed.
func TLSCipherSuites(cipherNames []string) ([]uint16, error) {

//go:build !purego

package aes

import (
	"crypto/cipher"
	"crypto/internal/alias"
	"internal/cpu"
)

type code int

// Function codes for the cipher message family of instructions.
const (
	aes128 code = 18
	aes192      = 19
	aes256      = 20
)

type aesCipherAsm struct {
	function code     // code for cipher message instruction
	key      []byte   // key (128, 192 or 256 bits)

// license that can be found in the LICENSE file.

// CFB (Cipher Feedback) Mode.

package cipher

import (
	"crypto/internal/alias"
	"crypto/subtle"
)

type cfb struct {
	b       Block
	next    []byte
	out     []byte
	outUsed int

	decrypt bool
}

func (x *cfb) XORKeyStream(dst, src []byte) {
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}

    }

    /**
     * Combines an algorithm and a key, and allows obtaining encryption/decryption ciphers according to those.
     */
    interface Session {
        SecretKey getKey();
        EncryptionAlgorithm getAlgorithm();
        Cipher encryptingCipher(IVCollector collector);
        Cipher decryptingCipher(IVLoader loader);
    }

    class EncryptionException extends RuntimeException {

// random nonces.
func NewGCMTransformer(block cipher.Block) (value.Transformer, error) {
	aead, err := newGCM(block)
	if err != nil {
		return nil, err
	}

	return &gcm{aead: aead, nonceFunc: randomNonce}, nil
}

func newGCM(block cipher.Block) (cipher.AEAD, error) {
	aead, err := cipher.NewGCM(block)
	if err != nil {
		return nil, err
	}