The Certificates issued by Oncase Campus are signed by a gpg key so that they can be validated independently by anyone who has the correct Onacase Campus public key. For independent verification Oncase Campus uses what is called a "detached signature", meaning that the signature for the certificate is contained in a separate file with a ".sig" extension.
To complete the verification procedure you will need the following three files:
- The official Oncase Campus instance public key.
- The Oncase Campus Certificates belonging to Francisco Ernesto Teixeira (you should already have this file).
- The signature file for Francisco Ernesto Teixeira's Certificates
Ensure you have the pdf, the ".sig" signature file and the public key copied to a single directory before you begin.
Import the public key on OSX using GPG Keychain
Download and install gpgtools.
After installation, GPG Keychain Access will prompt for a new personal keypair.
Click the import icon to import the public key file, Oncase Campus.pub.
CTRL-click the public key and select "sign" to validate it.
Confirm that the public key is listed in the GPG Keychain Access window and it has Short ID FEF8D954.
Import the Oncase Campus public key on Microsoft Windows using gpg4win
Download and install the full version of gpg4win.
After the installation is complete, launch Kleapatra from the start menu.
Create a new personal certificate if don't have one listed under "My Certificates".
Import the public key file, oncase-campus.pub by clicking on the "Import Certificate" icon.
Certify the public key by highlighting the new public key/certificate and selecting "Certify Certificate" under the "Certificates" menu.
Make sure that the public key/certificate is listed under the "Trusted Certificates" tab and verify it has the Key-ID FEF8D954.
When prompted, select "Create personal OpenPGP key pair."
Verify the Oncase Campus certificate using gpg on both OSX and Windows
- Open up a new terminal on OSX or a command window on Windows
- Go into the directory where the .sig and .pdf files are located
- Run the following command to verify the fingerprint of the Oncase Campus key
gpg --verify Certificate.pdf.sig Certificate.pdf