test.js

const crypto = require("crypto")

const key = "-----BEGIN CERTIFICATE-----\
MIICGTCCAcCgAwIBAgIQFtkcgVItucer8cXaJEFTIzAKBggqhkjOPQQDAjBpMQsw\
CQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNU2FuIEZy\
YW5jaXNjbzEUMBIGA1UEChMLZXhhbXBsZS5jb20xFzAVBgNVBAMTDmNhLmV4YW1w\
bGUuY29tMB4XDTI0MDMyNTIxNTEwMFoXDTM0MDMyMzIxNTEwMFowZjELMAkGA1UE\
BhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNhbiBGcmFuY2lz\
Y28xDjAMBgNVBAsTBWFkbWluMRowGAYDVQQDDBFBZG1pbkBleGFtcGxlLmNvbTBZ\
MBMGByqGSM49AgEGCCqGSM49AwEHA0IABEtyFYY243VeeMQYAFYtV3EXz5VxoSfj\
ExYrLwFC3bVt9/+jHSxviGEZImuDq+/5CAC5lpIXjGtOtpQVguaK7OqjTTBLMA4G\
A1UdDwEB/wQEAwIHgDAMBgNVHRMBAf8EAjAAMCsGA1UdIwQkMCKAIFdlfiRsMA/E\
p72KwD8nQumj836mRgUfNhGYVT9K0z85MAoGCCqGSM49BAMCA0cAMEQCIG4INUWP\
s1q2//xmqB/79UQ59w3AJck+Ng2raewrg36mAiAjWAlShGBn29QAnYOj/e8LPQQN\
lu2Qcmati7eceA1HHg==\
-----END CERTIFICATE-----"
const privateKey = crypto.createPrivateKey(key);

console.log(privateKey)