-.It Fl B
-Show the bubblebabble digest of specified private or public key file.
-.It Fl C Ar comment
-Provides the new comment.
-.It Fl D Ar reader
-Download the RSA public key stored in the smartcard in
-.Ar reader .
-.It Fl G Ar output_file
-Generate candidate primes for DH-GEX.
-These primes must be screened for
-safety (using the
-.Fl T
-option) before use.
-.It Fl M Ar memory
-Specify the amount of memory to use (in megabytes) when generating
-candidate moduli for DH-GEX.
-.It Fl N Ar new_passphrase
-Provides the new passphrase.
-.It Fl P Ar passphrase
-Provides the (old) passphrase.
-.It Fl S Ar start
-Specify start point (in hex) when generating candidate moduli for DH-GEX.
-.It Fl T Ar output_file
-Test DH group exchange candidate primes (generated using the
-.Fl G
-option) for safety.
-.It Fl W Ar generator
-Specify desired generator when testing candidate moduli for DH-GEX.