Combines the specified 'private' salt bytes with the specified additional extra bytes to use as the
total salt during hash computation. {@code privateSaltBytes} will be {@code null} }if no private salt has been
configured.
@param privateSalt the (possibly {@code null}) 'private' salt to combine with the specified extra bytes
@param publicSalt the extra bytes to use in addition to the given private salt.
@return a combination of the specified private salt bytes and extra bytes that will be used as the total
salt during hash computation.
Combines the specified 'private' salt bytes with the specified additional extra bytes to use as the total salt during hash computation. {@code privateSaltBytes} will be {@code null} }if no private salt has been configured.
@param privateSalt the (possibly {@code null}) 'private' salt to combine with the specified extra bytes @param publicSalt the extra bytes to use in addition to the given private salt. @return a combination of the specified private salt bytes and extra bytes that will be used as the total salt during hash computation.