openssl x509 -in clientca.pem -text -noout
Ensure the file truly is in PEM format (text-based). If it's a binary file, it will not work.
A valid entry looks like this:
Depending on your project, you must obtain this file through one of three valid methods:
This process creates a completely new, self-signed Certificate Authority dedicated solely to signing client certificates. Here's a step-by-step approach to creating and using it for client authentication in mutual TLS: clientca.pem download
# Linux/macOS chmod 644 clientca.pem
Downloading it from your specific cloud or software provider's official dashboard. openssl x509 -in clientca
When a clientca.pem download or configuration fails, the error messages can be cryptic. Below are the most common issues and their solutions.