如何在Golang Web服务器上设置HTTPS？

Question

I'm reading https://www.kaihag.com/https-and-go/ and bought an SSL certificate from Comodo which they emailed me a .zip file. All of the files I have so far look like this

csr.pem
private-key.pem
website.com.crt
website.com.ca-bundle
website.com.zip

The above website wants me to concatenate 3 .pem files which I don't have. Incidentally what is the reason the .pem files need to concatenated? Using the above files which haven't been modified, how can https be set up on a golang webserver?

Answer 1

Use https://golang.org/pkg/net/http/#ListenAndServeTLS

http.HandleFunc("/", handler)
log.Printf("About to listen on 10443. Go to https://127.0.0.1:10443/")
err := http.ListenAndServeTLS(":10443", "cert.pem", "key.pem", nil)
log.Fatal(err)

This isn't really a go question, but the intermediate certs are required because computers only store root certs. By concatenating them you put them all in one file so the browser gets all certs - this is a required step otherwise your server will fail on certain devices. Your cert provider will provide instructions for doing this. For go you need one cert file and one private key file.

https://kb.wisc.edu/page.php?id=18923

Here are some instructions for comodo for combining the certs (doesn't matter which server is used, the process is the same):

https://support.comodo.com/index.php?/Knowledgebase/Article/View/1091/37/certificate-installation--nginx