Building an OpenSSL Certificate Authority - Creating ECC Certificates

For anyone needing a copy of openssl_server.cnf:

https://pastebin.com/vk6jLpqS

[ ca ]
default_ca = CA_default
 
[ CA_default ]
# Directory and file locations.
dir               = /root/ca/intermediate
certs             = $dir/certs
crl_dir           = $dir/crl
new_certs_dir     = $dir/certs
database          = $dir/index.txt
serial            = $dir/serial
RANDFILE          = $dir/private/.rand
 
# The root key and root certificate.
private_key       = $dir/private/int.cheese.key.pem
certificate       = $dir/certs/int.cheese.crt.pem
 
# For certificate revocation lists.
crlnumber         = $dir/crlnumber
crl               = $dir/crl/whomovedmycheese.crl
crl_extensions    = crl_ext
default_crl_days  = 180
 
# SHA-1 is deprecated, so use SHA-2 or SHA-3 instead.
default_md        = sha384
 
name_opt          = ca_default
cert_opt          = ca_default
default_days      = 3000
preserve          = no
policy            = policy_loose
 
[ policy_loose ]
# Allow the intermediate CA to sign a more diverse range of certificates.
# See the POLICY FORMAT section of the `ca` man page.
countryName             = optional
stateOrProvinceName     = optional
localityName            = optional
organizationName        = optional
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional
 
[ req ]
# Options for the `req` tool (`man req`).
default_bits        = 2048
distinguished_name  = req_distinguished_name
string_mask         = utf8only
 
# SHA-1 is deprecated, so use SHA-2 or SHA-3 instead.
default_md          = sha384
 
# Extension to add when the -x509 option is used.
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
 
# Optionally, specify some defaults.
countryName_default             = US
stateOrProvinceName_default     = WA
localityName_default            = Seattle
0.organizationName_default      = Grilled Cheese Inc.
organizationalUnitName_default  = Grilled Cheese Intermediary CA
emailAddress_default            = grilledcheese@yummyinmytummy.us
 
[ v3_ca ]
# Extensions for a typical CA (`man x509v3_config`).
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
crlDistributionPoints = @crl_info
authorityInfoAccess = @ocsp_info
 
[ usr_cert ]
# Extensions for client certificates (`man x509v3_config`).
basicConstraints = CA:FALSE
nsCertType = client, email
nsComment = "OpenSSL Generated Client Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment
extendedKeyUsage = clientAuth, emailProtection
 
[ server_cert ]
# Extensions for server certificates (`man x509v3_config`).
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "Grilled Cheese Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth
crlDistributionPoints = @crl_info
authorityInfoAccess = @ocsp_info
subjectAltName = @alt_names
 
[alt_names]
DNS.0 = CN Name Here
DNS.1 = Whatever else here
 
[ crl_ext ]
# Extension for CRLs (`man x509v3_config`).
authorityKeyIdentifier=keyid:always
 
[ ocsp ]
# Extension for OCSP signing certificates (`man ocsp`).
basicConstraints = CA:FALSE
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, digitalSignature
extendedKeyUsage = critical, OCSPSigning
 
[crl_info]
URI.0 = http://crl.grilledcheese.us/whomovedmycheese.crl
 
[ocsp_info]
caIssuers;URI.0 = http://ocsp.grilledcheese.us/cheddarcheeseroot.crt
OCSP;URI.0 = http://ocsp.grilledcheese.us/