CSR algorithm/size is incorrect.Expected RSA 2048

Question

I am trying to integrate apple pay with braintree. I have followed up the following instructions to enable apple pay in the brain tree. In the first step, if you click on certificate signing request, it downloads a braintree_app_pay.certSigningRequest file which is used in the apple membership.

When I choose to create payment process certificate, I am getting the following error.

Answer 1

complimenting what @zepp said, you need to specify when creating CRS, and you can that by following the process below

1. Go to Keychain Access
2. Click on Certificate Assistance
3. Click on Request Certificate from Certificate Authority (click for image)
4. Enter all information and click on "Let me specify key pair Information"checkbox, then click on Continue
5. Aelect KeySize to be 256 and Algorithm to be ECC (click for image)
6. Then click on continue.