132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
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/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H<EFBFBD>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Kungliga Tekniska
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* H<EFBFBD>gskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb_locl.h"
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RCSID("$Id: create_auth_reply.c,v 1.11 1997/04/01 08:18:20 joda Exp $");
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/*
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* This routine is called by the Kerberos authentication server
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* to create a reply to an authentication request. The routine
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* takes the user's name, instance, and realm, the client's
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* timestamp, the number of tickets, the user's key version
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* number and the ciphertext containing the tickets themselves.
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* It constructs a packet and returns a pointer to it.
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*
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* Notes: The packet returned by this routine is static. Thus, if you
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* intend to keep the result beyond the next call to this routine, you
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* must copy it elsewhere.
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*
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* The packet is built in the following format:
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*
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* variable
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* type or constant data
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* ---- ----------- ----
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*
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* unsigned char KRB_PROT_VERSION protocol version number
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*
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* unsigned char AUTH_MSG_KDC_REPLY protocol message type
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*
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* [least significant HOST_BYTE_ORDER sender's (server's) byte
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* bit of above field] order
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*
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* string pname principal's name
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*
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* string pinst principal's instance
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*
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* string prealm principal's realm
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*
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* unsigned long time_ws client's timestamp
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*
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* unsigned char n number of tickets
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*
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* unsigned long x_date expiration date
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*
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* unsigned char kvno master key version
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*
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* short w_1 cipher length
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*
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* --- cipher->dat cipher data
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*/
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KTEXT
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create_auth_reply(char *pname, /* Principal's name */
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char *pinst, /* Principal's instance */
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char *prealm, /* Principal's authentication domain */
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int32_t time_ws, /* Workstation time */
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int n, /* Number of tickets */
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u_int32_t x_date, /* Principal's expiration date */
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int kvno, /* Principal's key version number */
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KTEXT cipher) /* Cipher text with tickets and session keys */
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{
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static KTEXT_ST pkt_st;
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KTEXT pkt = &pkt_st;
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unsigned char *p = pkt->dat;
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p += krb_put_int(KRB_PROT_VERSION, p, 1);
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p += krb_put_int(AUTH_MSG_KDC_REPLY, p, 1);
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if(n != 0){
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/* barf on old code */
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krb_warning("create_auth_reply: don't give me no krb3 crap!"
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" (n == %d)\n", n);
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return NULL;
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}
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p += krb_put_nir(pname, pinst, prealm, p);
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p += krb_put_int(time_ws, p, 4);
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p += krb_put_int(n, p, 1);
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p += krb_put_int(x_date, p, 4);
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p += krb_put_int(kvno, p, 1);
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p += krb_put_int(cipher->length, p, 2);
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memcpy(p, cipher->dat, cipher->length);
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p += cipher->length;
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pkt->length = p - pkt->dat;
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return pkt;
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}
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