[ ca ]
# `man ca`
default_ca = CA_default

[ CA_default ]
# Default directory locations (make sure to properly set the dir option as it dictates the rest of the other options)
dir               = /path/to/root_ca
certs             = $dir/certs
crl_dir           = $dir/crl
new_certs_dir     = $dir/newcerts
database          = $dir/index.txt
serial            = $dir/serial
RANDFILE          = $dir/private/.rand

# The root key and root certificate.
private_key       = $dir/private/root.key
certificate       = $dir/certs/root.crt

# For certificate revocation lists.
crlnumber         = $dir/crlnumber
crl               = $dir/crl/ca.crl
crl_extensions    = crl_ext
default_crl_days  = 30


default_md        = sha256

name_opt          = ca_default
cert_opt          = ca_default
default_days      = 375
preserve          = no
policy            = policy_strict

[ policy_strict ]
# policy_strict sets the root CA to sign certificates for intermediate CAs
# POLICY FORMAT section of "man ca" has more info
countryName             = match
stateOrProvinceName     = match
organizationName        = match
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional

[ policy_loose ]
# Allow the intermediate CA to sign a more diverse range of certificates
# See the POLICY FORMAT section of the "man ca"
countryName             = optional
stateOrProvinceName     = optional
localityName            = optional
organizationName        = optional
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional

[ req ]
# `req` options. See "man req" for more info
default_bits        = 2048
distinguished_name  = req_distinguished_name
string_mask         = utf8only

default_md          = sha256

x509_extensions     = v3_ca

[ req_distinguished_name ]

countryName                     = Country Name (2 letter code)
stateOrProvinceName             = State or Province Name
localityName                    = Locality Name
0.organizationName              = Organization Name
organizationalUnitName          = Organizational Unit Name
commonName                      = Common Name
emailAddress                    = Email Address

# Defaults
countryName_default             = US
stateOrProvinceName_default     = State/Province
localityName_default            = City
0.organizationName_default      = Your Org
organizationalUnitName_default  = Your OU
emailAddress_default            =

[ v3_ca ]
# Normal CA extensions. "man x509v3_config" has more info.
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always,issuer
basicConstraints = critical, CA:true
keyUsage = critical, digitalSignature, cRLSign, keyCertSign

[ v3_intermediate_ca ]
# Extensions for a typical intermediate CA "man x509v3_config"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always,issuer
basicConstraints = critical, CA:true, pathlen:0
keyUsage = critical, digitalSignature, cRLSign, keyCertSign

[ crl_ext ]
# CRL extensions if needed. See "man x509v3_config" for more info
authorityKeyIdentifier=keyid:always

[ ocsp ]
# If OCSP is needed. See "man ocsp" for more info.
basicConstraints = CA:FALSE
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, digitalSignature
extendedKeyUsage = critical, OCSPSigning