To sign a Certificate Signing Request (CSR) with your own Certificate Authority (CA), follow these general steps:
Generate a CSR: Use a tool like OpenSSL to generate a CSR along with a private key. This CSR contains your public key and details like your domain name and organization.
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openssl req -new -newkey rsa:2048 -nodes -keyout domain.key -out domain.csr
Setup your CA: If you don’t already have a CA, create one by generating a self-signed certificate.
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openssl req -new -x509 -keyout ca.key -out ca.crt -days 365
Sign the CSR: Use your CA’s private key to sign the CSR.
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openssl x509 -req -in domain.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out domain.crt -days 365
-CA ca.crt: Path to your CA certificate.
-CAkey ca.key: Path to your CA private key.
-CAcreateserial: Generates a serial number file if not already present.
Verify the signed certificate: Ensure the signed certificate (domain.crt) is correctly signed by your CA (ca.crt).
Install the certificate: Use the signed certificate (domain.crt) in your server or application where SSL/TLS is required.
These steps outline a basic process using OpenSSL. Adjustments may be necessary depending on your specific CA setup or tools used.