is it possible making openssl skipping the country/common name prompts?

Question

Is there a way to make openssl skiping the prompts such as

Country Name (2 letter code) [US]:
Organization Name (eg, company) [My Company Name LTD.]:
Common Nam         


        

Answer 1

Generate a config file and in the [req] section you can put prompt = no.

For example:

[req]
prompt = no
distinguished_name = req_distinguished_name
req_extensions = v3_req

[req_distinguished_name]
C = US
ST = California
L = Los Angeles
O = Our Company Llc
#OU = Org Unit Name
CN = Our Company Llc
#emailAddress = info@example.com

[v3_req]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names

[alt_names]
DNS.1 = example.com
DNS.2 = www.example.com

Then just execute e.g.

openssl req -new -sha256 -config THATFILE.conf -key example.com.key -out example.com.csr