new [cipher.Block] implementation. // The key argument should be the AES key, either 16, 24, or 32 bytes to select // AES-128, AES-192, or AES-256. func New(key []byte) (*Block, error) { // This call is outline to let the allocation happen on the parent stack. return newOutlined(&Block{}, key) } // newOutlined is marked go:noinline to avoid it inlining into New, and making New // too complex to inline itself. // //go:noinline func newOutlined(b *Block, key []byte) (*Block, error) { switch len(key)...