Here are some quick reminders on extracting fingerprints from various encryption keys.

With GNU Privacy Guard (OpenPGP keys):

$ gpg --fingerprint
/path/to/pubring.gpg
------------------------------
pub   1024D/12345678 2008-08-09 [expires: 2011-08-08]
      Key fingerprint = 1234 5678 90AB CDEF 1234  5678 90AB CDEF 1234 5678
uid                  John Doe <nowhere@invalid.com>

... (other accounts in your keyring) ...

With OpenSSH (SSH keys):

$ ssh-keygen -lf some-key.pub
2048 12:34:56:78:90:ab:cd:ef:12:34:56:78:90:ab:12:34 some-key.pub (RSA)

With OpenSSL (SSL keys):

$ openssl x509 -noout -in cert.pem -fingerprint
SHA1 Fingerprint=12:34:56:78:90:AB:CD:EF:12:34:56:78:90:AB:CD:EF:12:34:56:78