krb5_encrypt_tkt_part
errcode = krb5_encrypt_tkt_part(kdc_context, &encrypting_key, &ticket_reply);
if ((errcode = krb5_encrypt_tkt_part(kdc_context, t2enc->session,
errcode = krb5_encrypt_tkt_part(kdc_context, &encrypting_key,
krb5_error_code krb5_encrypt_tkt_part