123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
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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. 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: cr_err_reply.c,v 1.1.1.2 2000/12/29 01:43:12 assar Exp $");
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/*
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* This routine is used by the Kerberos authentication server to
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* create an error reply packet to send back to its client.
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*
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* It takes a pointer to the packet to be built, the name, instance,
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* and realm of the principal, the client's timestamp, an error code
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* and an error string as arguments. Its return value is undefined.
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*
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* The packet is built in the following format:
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*
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* type variable data
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* or constant
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* ---- ----------- ----
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*
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* unsigned char req_ack_vno protocol version number
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*
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* unsigned char AUTH_MSG_ERR_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 long e error code
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*
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* string e_string error text
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*/
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int
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cr_err_reply(KTEXT pkt, char *pname, char *pinst, char *prealm,
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u_int32_t time_ws, u_int32_t e, char *e_string)
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{
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unsigned char *p = pkt->dat;
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int tmp;
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size_t rem = sizeof(pkt->dat);
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tmp = krb_put_int(KRB_PROT_VERSION, p, rem, 1);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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tmp = krb_put_int(AUTH_MSG_ERR_REPLY, p, rem, 1);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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if (pname == NULL) pname = "";
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if (pinst == NULL) pinst = "";
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if (prealm == NULL) prealm = "";
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tmp = krb_put_nir(pname, pinst, prealm, p, rem);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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tmp = krb_put_int(time_ws, p, rem, 4);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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tmp = krb_put_int(e, p, rem, 4);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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tmp = krb_put_string(e_string, p, rem);
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if (tmp < 0)
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return -1;
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p += tmp;
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rem -= tmp;
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pkt->length = p - pkt->dat;
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return 0;
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}
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