Add sha256 support

[PubliAlex]

Hello,

Systempay propose 2 keys for encryption :

• sha1
• sha256

It seems your script is based on an old version of payzen that provided only sha1 support. That method is deprecated, you should use sha256 method instead, or, even better, let the user choose.

Here is the documentation about it : https://paiement.systempay.fr/doc/en-EN/form-payment/standard-payment/computing-the-signature.html

Best regards,

Alex

[damsfx]

Hi Alex,

I apologize for the late response, I'm busy at the moment.
You can always submit a PR if you've made those changes; if not, a list of changes to make and I'll try to free up some time.

[damsfx]

Give a try : https://github.com/Hounddd/omnipay-systempay/pull/5/commits/984074c9cc2ad3c56e6c6af84a78dca12df00c68

[PubliAlex]

It works, thank you