Function newScryptParams

internal/kdf/scrypt.go:42–62

(s string)

}

func newScryptParams(s string) (*scryptParam, error) {
	params := phcParamsToMap(s)
	ln, err := phcAtoi(params["ln"], 16)
	if err != nil || ln < 1 || ln > ScryptMaxCost {
		return nil, errors.Errorf("invalid scrypt parameter ln=%s", params["ln"])
	}
	r, err := phcAtoi(params["r"], 8)
	if err != nil || r < 1 || r > ScryptMaxBlockSize {
		return nil, errors.Errorf("invalid scrypt parameter r=%s", params["r"])
	}
	p, err := phcAtoi(params["p"], 1)
	if err != nil || p < 1 || p > ScryptMaxParallelism {
		return nil, errors.Errorf("invalid scrypt parameter p=%s", params["p"])
	}

	return &scryptParam{
		N: int(math.Pow(2, float64(ln))),
		r: r,
		p: p,
	}, nil
}

func (s *scryptParam) getParams() string {
	return fmt.Sprintf("ln=%d,r=%d,p=%d", int(math.Log2(float64(s.N))), s.r, s.p)