// [NewGCM], which is faster and more resistant to misuse.
func NewGCMWithNonceSize(cipher Block, size int) (AEAD, error) {
	return newGCMWithNonceAndTagSize(cipher, size, gcmTagSize)
}

// NewGCMWithTagSize returns the given 128-bit, block cipher wrapped in Galois
// Counter Mode, which generates tags with the given length.
//
// Tag sizes between 12 and 16 bytes are allowed.
//