k5_der_add_taglen
k5_der_add_taglen(buf, idbyte, len);
k5_der_add_taglen(buf, 0x60, seq_len);
k5_der_add_taglen(&buf, CONTEXT | 0x00, hint_len);
k5_der_add_taglen(&buf, SEQUENCE_OF, ilen);
k5_der_add_taglen(&buf, HEADER_ID, mech_len + choice_len);
k5_der_add_taglen(&buf, CONTEXT | 0x00, seq_len);
k5_der_add_taglen(&buf, SEQUENCE, fields_len);
k5_der_add_taglen(&buf, CONTEXT | 0x02, f2len);
k5_der_add_taglen(&buf, CONTEXT | 0x03, f3len);
k5_der_add_taglen(&buf, CONTEXT | 0x01, seq_len);
k5_der_add_taglen(&buf, SEQUENCE, fields_len);
k5_der_add_taglen(&buf, CONTEXT | 0x00, f0len);
k5_der_add_taglen(&buf, CONTEXT | 0x01, f1len);
k5_der_add_taglen(&buf, CONTEXT | 0x02, f2len);
k5_der_add_taglen(&buf, CONTEXT | 0x03, f3len);