infinity is shorter than all other encodings. func (p *P256Point) Bytes() []byte { // This function is outlined to make the allocations inline in the caller // rather than happen on the heap. var out [p256UncompressedLeng]byte return p.bytes(&out) } func (p *P256Point) bytes(out *[p256UncompressedLeng]byte) []byte { // The SEC 1 representation of the point at infinity is a single zero byte, // and only infinity has z = 0. if p.z.IsZero() == 1 { return append(out[:0], 0) } zinv := new(fiat.P256Element).Invert(&p.z)...