Show the bubblebabble digest of specified private or public key file.
.It Fl b Ar bits
Specifies the number of bits in the key to create.
Minimum is 512 bits.
Minimum is 1024 bits.
Generally, 2048 bits is considered sufficient.
The default is 2048 bits.
.It Fl C Ar comment
"degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
switch (opt) {
case 'b':
bits = strtonum(optarg, 512, 32768, &errstr);
bits = strtonum(optarg, 1024, 32768, &errstr);
if (errstr)
fatal("Bits has bad value %s (%s)",
optarg, errstr);