ccat prompts for a passphrase and decrypts (onto standard
output) the specified CFS encrypted files. If a corresponding CFS IV
file (.pvect_*) file exists in the same directory, it is used to
perturb the file accordingly. By default, files are decrypted using
standard 2-key hybrid mode single-DES. The -3 option specifies
2-key hybrid mode triple DES. The -m option specifies 1-key
hybrid mode MacGuffin, and -s specifies SAFER-SK128.
ccat is intended to assist in emergency access to CFS
directories when no machine running a CFS daemon is available. It is
ordinarily used in conjunction with cname(8).