public String getAlgorithmName() {
            return algorithmName;
        }
Returns the name of the HMAC algorithm which the TOTP implementation
should use when operating in this mode. The name returned will be
in the format required by Mac.getInstance().

@return
    The name of the HMAC algorithm which the TOTP implementation
    should use.
extensions/guacamole-auth-totp/src/main/java/org/apache/guacamole/totp/TOTPGenerator.java