From 7e90eb12bc38a365b2b2f31efce8cfcb1d3abc67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reynir=20Bj=C3=B6rnsson?= <reynir@reynir.dk>
Date: Wed, 9 Dec 2020 22:51:44 +0100
Subject: [PATCH] Add usage example

---
 README.md | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/README.md b/README.md
index 2ecce07..9b20f79 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,48 @@ If a user tries to get a certificate for another user the request will be reject
 It will also add an email address as the SubjectAltName.
 This is for client certificates.
 
+## Usage
+
+Run the server:
+
+```shell
+$ cert-service-server
+```
+
+Get a certificate with the client program:
+
+```shell
+$ cert-service-client
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDHPBHCG+BI9EMW
+[...]
+jV6RSgZDKsR4uB/F5NDy4BA=
+-----END PRIVATE KEY-----
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+```
+
+A key and CSR is created by the client and the key and certificate is just printed out to stdout in PEM format.
+Ideally, you should be able to pass a CSR you have created on another machine, but it is not yet implemented in this proof of concept.
+
 ## Motivation
 
 This was written with [hashbang.sh](https://hashbang.sh/) in mind - a open registration shell server.