[ req ]
default_bits       = 4096
distinguished_name = req_distinguished_name

[ req_distinguished_name ]
countryName                 = Country Name (2 letter code)
countryName_default         = CN
stateOrProvinceName         = State or Province Name (full name)
stateOrProvinceName_default = Tencent
localityName                = Locality Name (eg, city)
localityName_default        = Shenzhen
organizationName            = Organization Name (eg, company)
organizationName_default    = Tencent IoT
commonName                  = Common Name (e.g. server FQDN or YOUR name)
commonName_max              = 64
commonName_default          = Tencent CA Test


openssl genrsa -out ca.key 4096


openssl req -new -sha256 -out ca.csr -key ca.key -config ca.conf


openssl x509 -req -days 3650 -sha256 -extfile openssl.cnf -extensions v3_ca -in ca.csr -signkey ca.key -out ca.crt


openssl genrsa -out verificationCert.key 2048


openssl req -new -key verificationCert.key -out verificationCert.csr


Common Name (e.g. server FQDN or YOUR name) []: 9f5cfb6ec0fcbdffd94473491bbb052e339e5b7beff4d7ed46420b697****


openssl x509 -req -in verificationCert.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out verificationCert.crt -days 300 -sha512


openssl genrsa -out dev_01.key 2048


openssl req -new -key dev_01.key -out dev_01.csr


Common Name (e.g. server FQDN or YOUR name) []: U58***2YLJdev_01


openssl x509 -req -in dev_01.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out dev_01.crt -days 3650 -sha512 -extfile openssl.cnf -extensions v3_req