0xfffffffffffffffe, 0x00000004fffffffd} switch { // Point at infinity. case len(b) == 1 && b[0] == 0: return p.Set(NewP256Point()), nil // Uncompressed form. case len(b) == p256UncompressedLeng && b[0] == 4: var r P256Point p256BigToLittle(&r.x, (*[32]byte)(b[1:33])) p256BigToLittle(&r.y, (*[32]byte)(b[33:65])) if p256LessThanP(&r.x) == 0 || p256LessThanP(&r.y) == 0 { return nil, errors.New("invalid P256 element encoding") } p256Mul(&r.x, &r.x, &rr) p256Mul(&r.y, &r.y, &rr) if err := p256CheckOnCurve(&r.x,...