OpenSSL -- TLS Server Certificate Request Configuration File

# TLS server certificate request

[ default ]
SAN                     = DNS:yourdomain.tld    # Default value

[ req ]
default_bits            = 8192                  # RSA key size
encrypt_key             = no                    # Protect private key
default_md              = sha256                # MD to use
utf8                    = yes                   # Input is UTF-8
string_mask             = utf8only              # Emit UTF-8 strings
prompt                  = yes                   # Prompt for DN
distinguished_name      = server_dn             # DN template
req_extensions          = server_reqext         # Desired extensions

[ server_dn ]
countryName             = "1. Country Name (2 letters) (eg, US)       "
countryName_max         = 2
stateOrProvinceName     = "2. State or Province Name   (eg, region)   "
localityName            = "3. Locality Name            (eg, city)     "
organizationName        = "4. Organization Name        (eg, company)  "
organizationalUnitName  = "5. Organizational Unit Name (eg, section)  "
commonName              = "6. Common Name              (eg, FQDN)     "
commonName_max          = 64

[ server_reqext ]
keyUsage                = critical,digitalSignature,keyEncipherment
extendedKeyUsage        = serverAuth,clientAuth
subjectKeyIdentifier    = hash
subjectAltName          = $ENV::SAN