Final answer:
To get a public certificate from a URL, use a web browser's security features to view and export the certificate, or employ command-line tools like OpenSSL to retrieve it directly.
Step-by-step explanation:
To get a public certificate from a URL, you can use a web browser or command-line tools. While browsers vary slightly in their processes, the general steps include navigating to the website, clicking on the padlock or security icon near the URL, viewing the certificate details, and then exporting it.Alternatively, using command-line tools like OpenSSL can provide a more direct approach.
To use OpenSSL, you would open your terminal or command prompt and enter a command similar to: openssl s_client -showcerts -connect example.com:443This command retrieves the public certificate from the specified URL. The output can then be saved to a file for further use.