mbedtls/framework/data_files/test-ca.server1.test_serial.opensslconf

 [ ca ]
 default_ca             = test-ca

 [ test-ca ]
 certificate            = test-ca.crt
 private_key            = test-ca.key
 serial                 = test-ca.server1.tmp.serial
 default_md             = sha1
 default_startdate      = 20190210144406Z
 default_enddate        = 20290210144406Z
 x509_extensions        = v3_ca
 new_certs_dir          = ./
 database               = ./test-ca.server1.db
 policy                 = policy_match
 unique_subject         = no

 [v3_ca]
 basicConstraints = CA:false
 subjectKeyIdentifier=hash
 authorityKeyIdentifier=keyid:always

 [policy_match]
 countryName            = supplied
 organizationName       = supplied
 commonName             = supplied