[B<-binary>]
[B<-out filename>]
[B<-sign filename>]
+[B<-passin arg>]
[B<-verify filename>]
[B<-prverify filename>]
[B<-signature filename>]
+[B<-hmac key>]
[B<file...>]
[B<md5|md4|md2|sha1|sha|mdc2|ripemd160>]
digitally sign the digest using the private key in "filename".
+=item B<-passin arg>
+
+the private key password source. For more information about the format of B<arg>
+see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)|openssl(1)>.
+
=item B<-verify filename>
verify the signature using the the public key in "filename".
the actual signature to verify.
+=item B<-hmac key>
+
+create a hashed MAC using "key".
+
=item B<-rand file(s)>
a file or files containing random data used to seed the random number