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go-lang-https-self-signed
Sample of a self signed certificate https server in golang. This repo demonstrates to you the best way to up your self signed cert in golang. It shows in a simple way how to generate and trust the ssl certificate and how to serve a https server in golang.
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To proceed with the next steps, you're gonna need to clone this github repo. The current example is composed by a server and a client called https-server and https-client respectively. Each one runs in its specific container, the server provides a REST API written in golang and is responsible to create the self signed certificate. That certificate protects two hostnames: localhost and https-server, that multi-domain approach is possible thanks to the Subject Alternative Names (SANs). Take a look at the diagram below that represents the current example:
The command above will firstly up the server container and run some commands from a file called generate-certificate.sh. That bash file contains some openssl commands to create the self signed certificate. First, it generates a servercert.key and servercert.csr which are respectively: the private key and the certificate signing request (CSR) that contains the public key. The CN field in -subj is very important because some browsers like chrome require that information (CN means Common Name, that's the domain name you would like to have SSL secured). Then, the certificate file will be generated also, this file, named servercert.crt, is generated by the last command in the bash file. That's the self-signed certificate signed by your own servercert.key private key. The x509 flag states the standard format of an SSL/TLS certificate, the X.509 format. Finally, the https server are gonna get up by the go run main.go command. Take a look at the bash commands bellow: