Generate SCR SSL Certificate with “Subject Alternative Names”

Introduction

This quick tutorial show how in easy way generate Certificate Signing Request with Subject Alternative Names

How to do it ?

• First we need to have openssl installed, we can download from this site.
• Configuration for CSR

• Generate RSA key file

C:\temp
λ openssl genrsa -out example.com.key 2048
Generating RSA private key, 2048 bit long modulus
...........................................................................................................................+++
......+++
e is 65537 (0x10001)
C:\temp
λ

• Generate CSR

C:\temp
λ openssl req -new -key example.com.key -out example.com.csr -config example.com.cnf

• Now we can verify the CSR

C:\temp
λ openssl req -in example.com.csr -noout -text
Certificate Request:
    Data:
        Version: 0 (0x0)
        Subject: C=PL, L=Warsaw, O=Example, OU=EX…