[ERROR] handler: http: TLS handshake error from :: remote error: tls: bad certificate

I was getting [ERROR] handler: http: TLS handshake error from :: remote error: tls: bad certificate error while injecting hashicope vault annotations using vault injector.

Error

[ERROR] handler: http: TLS handshake error from <ip>:<port>: remote error: tls: bad certificate

Why is This Error?

The error message “[ERROR] handler: http: TLS handshake error from :: remote error: tls: bad certificate” indicates a problem during the TLS (Transport Layer Security) handshake process in a server-client communication. This error commonly occurs when there is an issue with the SSL/TLS certificate presented by the server, and the client is unable to establish a secure connection due to problems with the certificate.

Here’s a breakdown of the key components of the error

[ERROR]: Indicates that an error has occurred.

handler: http: Specifies that the error is related to the HTTP handler, indicating it’s likely occurring in the context of a web server.

TLS handshake error from ::: Suggests that the error is originating from a specific IP address or hostname.

remote error: tls: bad certificate: Indicates that the TLS handshake failed due to an issue with the SSL/TLS certificate presented by the remote server. The certificate is considered invalid or has some problem that prevents the establishment of a secure connection.

To address this error, consider the following steps

Check Certificate Validity: Verify that the SSL/TLS certificate presented by the server is valid and has not expired. You can use tools like OpenSSL to inspect the certificate details.

Certificate Chain: Ensure that the certificate chain is complete and properly configured. The certificate chain should include all intermediate certificates leading to a trusted root certificate.

Certificate Common Name (CN): Confirm that the Common Name (CN) or Subject Alternative Name (SAN) on the certificate matches the domain or IP address being accessed. Mismatch can cause handshake errors.

Update Certificate: If the certificate is invalid or expired, obtain and install a new, valid SSL/TLS certificate.

Check Server Configuration: Review the server’s SSL/TLS configuration to ensure it is correctly configured to present the appropriate certificate.

Client Configuration: If you are the client, ensure that your client application or library is configured to trust the certificate presented by the server.

By addressing issues related to the SSL/TLS certificate, you can resolve the “[ERROR] handler: http: TLS handshake error from :: remote error: tls: bad certificate” error and establish a secure connection between the client and server.