package sm4

import "crypto/cipher"

// NewGCM return a standard AEAD for sm4-gcm of 12 bytes nonce and 16 bytes tag.
func NewGCM(key []byte) (cipher.AEAD, error) {
	c, err := NewCipher(key)
	if err != nil {
		return nil, err
	}
	return cipher.NewGCM(c)
}