Using Pem File to get Public/Private Key

Question

I have certificate which is Contains Private Key,Root Chain, and Format is Base64(openSSL)
My Certificate contents. (mycert.pem):

subject=CN=MainDomain.com, OU=ISD, O=GIT Inc, S=AR, C=US
issuer=CN=ABC, DC=homeoffice, DC=ABC, DC=com
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
subject=CN=-TLS-01-SHA256, DC=homeoffice, DC=ABC, DC=com
issuer=CN=ABC01-SHA256, DC=homeoffice, DC=ABC, DC=com
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
subject=CN=-TLSRoot-01-SHA256, DC=homeoffice, DC=ABC, DC=com
issuer=CN=ABC01-SHA256, DC=homeoffice, DC=ABC, DC=com
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
subject=CN=-TLSSOME-01-SHA256, DC=homeoffice, DC=ABC, DC=com
issuer=CN=ABC01-SHA256, DC=homeoffice, DC=ABC, DC=com
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
-----END RSA PRIVATE KEY-----

I need to provide these thing in the GCP load balancer side

Public key certificate (.crt file)
Certificate chain (.csr file)
Private key (.key file).

How i can generate these thing ? Can i copy paste the content directly is it is same which is provided in my pem file

Answer 1

Yes, you can simply copy/paste your certificate content or upload it, as it's described here:

1. Go to the Network Services> Load Balancing> Certificates tab in the Google Cloud Console.
2. Click Create SSL certificate.
3. Enter a name and an optional description for the certificate.
4. Select Upload my certificate.
5. Paste in your certificate or click Upload to navigate to your certificate file. You can choose to include the CA certificate chain in the same file as the certificate. Google Cloud does not validate the certificate chain for you – validation is your responsibility.
6. Paste in your private key or click Upload to navigate to your private key file.
7. Click Create.

If you have any other question about how to Use self-managed SSL certificates, here is the Google public documentation link:

https://cloud.google.com/load-balancing/docs/ssl-certificates/self-managed-certs#createresoure