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Generate a CSR with openssl

  • Nov 21 / 2017
  • 0
Linux

Generate a CSR with openssl

Generate a CSR (Certificate Signing Request) on your server when you want to get a certificate from a certified provider is often a mandatory step, very easy to execute.

Here are the different steps to execute:

  1. Create a specific directory where you will put all your files
    mkdir sub.domain.com && cd sub.domain.com
  2. Generate a private key of 2048 bits
     openssl genrsa -out sub.domain.com.key 2048
  3. Now generate a CSR with openssl and with the private key you just generated
    openssl req -new -sha256 -key sub.domain.com.key -out sub.domain.com.csr

    Many information will be asked during the creation:

    Country Name (2 letter code) []: 
    State or Province Name (full name) []:
    Locality Name (eg, city) []:
    Organization Name (eg, company) []:
    Organizational Unit Name (eg, section) []:
    Common Name (eg, YOUR name) []:
    Email Address []:
    A challenge password []:
    An optional company name []:
  4. You now have your CSR and your private key

It’s up to you to get your signed certificate from an official provider using those files.

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