MIGS Integration for Wordpress and Security Update for MD5 to SHA256

Hi, i have a wordpress site and i want to using MIGS ( mastercard payment gateway services ) but they want to SHA256 algorithm. But wordpress is not using SHA256 so i want to; 1-) I am using [login to view URL] this plugin have a support for SHA256 so if you take a this job you have to work with this plugin. 2-) Complete integration. I want to shopping with test cards. I will give you all MIGS details for integration ( Merchant ID, Access Code, Secure Hash Secret 1 and MIGS TEST URL ) and My wordpress and hosting information.