Sometime late last week or over the weekend, our requests to authorize.net in our produciton environment (post url - https://api.authorize.net/xml/v1/request.api) have been giving us a curl error:
- error number: 60
- error text: Peer certificate cannot be authenticated with known CA certificates
We are running on centos 6.8 with php 5.4.45 and nginx 1.8.0. I have attempted to update ca-certificates and nss. Neither has fixed the issue. Commenting out the curl option CAINFO has mitigated the issue for the time being. I have looked at the .pem file that CAINFO line points to, it is good through 2022.
The code sets CURLOPT_SSL_VERIFYPEER to 2 prior to seting CURLOPT_CAINFO.
The code and the environment hasn't changed over this period of time.
Thank you for your time and assistance.
