Programming Tips  October 22, 2024

Troubleshooting Guide: Resolving cURL Error 60 (SSL Certificate Problem) During Auth0 Callback

Issue Summary:

When using Auth0 for authentication, you might encounter the following error during the callback process:

This error occurs because the system cannot verify the SSL certificate of the server you are trying to connect to during the Auth0 callback. This guide will help you resolve this issue.

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Step 1: Ensure Your System Can Access the CA Bundle

cURL requires a Certificate Authority (CA) bundle to verify SSL certificates. If the bundle is missing or outdated, the connection will fail. Follow these steps to download and configure the latest CA bundle.

1.1 Download the Latest CA Bundle

• Download the latest CA certificate bundle (cacert.pem) from this link: https://curl.haxx.se/docs/caextract.html.

1.2 Save the CA Bundle

• Place the downloaded cacert.pem file in a directory on your server. For example:
  makefile

  C:\<path to certificate file>\certs\cacert.pem

1.3 Configure PHP to Use the CA Bundle

• Open your php.ini file, which can usually be found in your PHP installation directory (e.g., C:\PHP\php.ini).

• Locate or add the following lines in your php.ini file to point to the downloaded cacert.pem file:

  File : php.ini
  
  

  curl.cainfo = "C:\<path to certificate file>\certs\cacert.pem"
openssl.cafile = "C:\<path to certificate file>\certs\cacert.pem"

• Save the changes to the php.ini file.

1.4 Restart the Web Server

• Restart your web server (IIS, Apache, Nginx, etc.) to apply the new configuration.

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After completing these steps, the cURL error related to SSL certificates should be resolved, allowing the Auth0 callback process to proceed successfully.

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