/* $OpenBSD: create_auth_reply.c,v 1.4 1998/07/07 19:06:44 art Exp $ */ /* $KTH: create_auth_reply.c,v 1.11 1997/04/01 08:18:20 joda Exp $ */ /* * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H�gskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Kungliga Tekniska * H�gskolan and its contributors. * * 4. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "krb_locl.h" /* * This routine is called by the Kerberos authentication server * to create a reply to an authentication request. The routine * takes the user's name, instance, and realm, the client's * timestamp, the number of tickets, the user's key version * number and the ciphertext containing the tickets themselves. * It constructs a packet and returns a pointer to it. * * Notes: The packet returned by this routine is static. Thus, if you * intend to keep the result beyond the next call to this routine, you * must copy it elsewhere. * * The packet is built in the following format: * * variable * type or constant data * ---- ----------- ---- * * unsigned char KRB_PROT_VERSION protocol version number * * unsigned char AUTH_MSG_KDC_REPLY protocol message type * * [least significant HOST_BYTE_ORDER sender's (server's) byte * bit of above field] order * * string pname principal's name * * string pinst principal's instance * * string prealm principal's realm * * unsigned long time_ws client's timestamp * * unsigned char n number of tickets * * unsigned long x_date expiration date * * unsigned char kvno master key version * * short w_1 cipher length * * --- cipher->dat cipher data */ KTEXT create_auth_reply(char *pname, /* Principal's name */ char *pinst, /* Principal's instance */ char *prealm, /* Principal's authentication domain */ int32_t time_ws, /* Workstation time */ int n, /* Number of tickets */ u_int32_t x_date, /* Principal's expiration date */ int kvno, /* Principal's key version number */ KTEXT cipher) /* Cipher text with tickets and session keys */ { static KTEXT_ST pkt_st; KTEXT pkt = &pkt_st; unsigned char *p = pkt->dat; if(n != 0) return NULL; p += krb_put_int(KRB_PROT_VERSION, p, 1); p += krb_put_int(AUTH_MSG_KDC_REPLY, p, 1); p += krb_put_nir(pname, pinst, prealm, p); p += krb_put_int(time_ws, p, 4); p += krb_put_int(n, p, 1); p += krb_put_int(x_date, p, 4); p += krb_put_int(kvno, p, 1); p += krb_put_int(cipher->length, p, 2); memcpy(p, cipher->dat, cipher->length); p += cipher->length; pkt->length = p - pkt->dat; return pkt; }