Write a PHP function for a Wordpress plugin that creates a software license key

I need a simple function written that creates a software license key. The function will be in a plugin by itself, and hooked into a filter. The function will be used by the commercial products Easy Digital Downloads and the Software Licensing extension. These can both be downloaded from: [login to view URL] Some examples of similar plugin code that I need written is here: [login to view URL] The license key is generated after a customer makes a purchase. The key will be created from some of the customer information (such as name and/or email address) and other text which will them be used to generate a key in a format consisting of 5 six-character strings separated by hyphens. The plugin must be able to identify which product was purchased, and the first and last names and the email address associated with that purchase. It will then select a predefined string (using If...Else) based on the product purchased (The predefined strings will be added by the vendor for each different product). It will then create a string to be encrypted by combining the selected predefined string with customer name and/or email address data, encrypt the string using MD5 or other encryption function, format it correctly, and return $key. IMPORTANT: This work must be done on the freelancer's servers using the test plugins. They will not have access to our servers. The plugin code will be provided to me for testing by the freelancer, and the escrowed payment will be released upon successful testing of the code in our environment. COST: Budget for this project is not to exceed $100.00, so don't bid unless you are sure that you can do it for that price or less. This should be an easy project for a Wordpress and PHP expert.