tls-certificate-diagnosis

To diagnose a TLS handshake failure, this Skill automates OpenSSL connectivity tests to analyze server responses and pinpoint root causes like missing intermediate certificates or cipher suite mismatches. It eliminates manual command-line trial and error for production services.

An SSL certificate verify failed error occurs due to certificate expiration, incomplete certificate chains, or CA trust issues. This Skill maps the specific error message to root causes by validating the certificate chain against the target endpoint.

You can use this Skill to troubleshoot mTLS authentication and SNI configuration issues by performing comprehensive OpenSSL validation checks. It covers multi-scenario diagnosis including mutual TLS authentication and server name indication configuration analysis.

The best way to identify an incomplete TLS certificate chain during security auditing is to automate chain validation checks. This Skill analyzes server responses and certificate chains to detect missing intermediate certificates and configuration issues.

Yes, you need bash, bc, and OpenSSL installed to run automated TLS certificate diagnosis. These dependencies are required to execute the connectivity tests and validation checks against your target endpoints.

When diagnosing no shared cipher errors with automated scripts, the analysis depends entirely on the target server's response to the OpenSSL connectivity test. The Skill maps the error to a cipher suite mismatch but requires network access to the endpoint.