=head1 DESCRIPTION
CMS_add0_cert() and CMS_add1_cert() add certificate B<cert> to B<cms>.
-must be of type signed data or enveloped data.
+must be of type signed data or enveloped data.
CMS_get1_certs() returns all certificates in B<cms>.
=head1 RETURN VALUES
CMS_add0_cert(), CMS_add1_cert() and CMS_add0_crl() and CMS_add1_crl() return
-1 for success and 0 for failure.
+1 for success and 0 for failure.
CMS_get1_certs() and CMS_get1_crls() return the STACK of certificates or CRLs
or NULL if there are none or an error occurs. The only error which will occur