Dynamically encrypt a PayPal "pay now" button.

[irbk]

I have a custom shopping cart on my website. I transfer the payment information to paypal using a modified "individual item details" method as described on page 82 of the PayPal "Website Payments Standard Integration Guide". I've recently learned that this "pay now" button that I have on my website is unencrypted. This means that some one could easily view the source code of my page, edit the pricing information, and submit the incorrect information to paypal. I've looked at the "Encrypted Website Payments" section of the "Website Payments Standard Integration Guide" and by following the guide I've created my private and public keys, uploaded my public key to paypal and downloaded paypals public key. Here is my issue. The "Encryption your HTML" section of the integration guide says to download a program, prepare an input file for each encrypted button you want to create, run the encryption program, and copy the encrypted code to the website. As my paypal "Pay Now" button code is dynamically generated by PHP when the user clicks into his/her shopping cart, how am I supposed to encrypt that "Pay Now" button code?

Thanks in advance.

 

[BiggerBrother]

You may want to checkout

http://www.paypaltech.com/Dave/api_sourcebook/html/ewp/ewpphp.html

. This provides you with the OpenSource Classses required to generate any encrypted buttons within your PHP script.

Good luck

BB