private static int parseIterations(String parameters) {
        String parameter = DELIMITER_COMMA.splitAsStream(parameters)
                .filter(parm -> parm.startsWith("t="))
                .findAny()
                .orElseThrow(() -> new IllegalArgumentException("Did not found memory parameter 't='. Got: ["
                        + parameters + "]."));

        return Integer.parseInt(parameter.substring(2));
    }
128 bits of salt is the recommended salt length, taken from draft-irtf-cfrg-argon2-13, 4.2.
crypto/support/hashes/argon2/src/main/java/org/apache/shiro/crypto/support/hashes/argon2/Argon2Hash.java