calculate_string_buffer
a_name_size = calculate_string_buffer(a_name);
a_value_size = calculate_string_buffer(a_value);
size_t calculate_string_buffer(const char *str);
password_type_size = calculate_string_buffer(password_type);
current_password_size = calculate_string_buffer(current_password);
new_size = calculate_string_buffer(new);