Technical Tip: Extract a public key from a certificate file using OpenSSL

To extract a public key from a certificate file using OpenSSL in Windows operating systems. 

Download the 'Fortinet_Factory' certificate from System -> Certificates. 

Use the OpenSSL command to extract the public key:

openssl x509 -in certificate_file_name.cer -pubkey -noout > public_key_name.pem

For example:

Note: 

• Define the file path where the cert resides. 
• In Windows operating systems, use the correct path syntax.

Open the '.pem' and 'Fortinet_Factory.cer', files in notepad, the PEM file will contain the public key extracted.

Fortinet_Factory.cert file:

Public key PEM file: