if err := json.Unmarshal(data, &info); err != nil {
		return err
	}
	sum, err := hex.DecodeString(info.Hash)
	if err != nil {
		return err
	}
	c.Algorithm = BitrotAlgorithmFromString(info.Algorithm)
	c.Hash = sum
	if _, err = fmt.Sscanf(info.Name, "part.%d", &c.PartNumber); err != nil {
		return err
	}

	if !c.Algorithm.Available() {