114 lines
3.4 KiB
C
114 lines
3.4 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: mk_auth.c,v 1.8 1999/12/02 16:58:43 joda Exp $");
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/*
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* Generate an authenticator for service.instance@realm.
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* instance is canonicalized by `krb_get_phost'
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* realm is set to the local realm if realm == NULL
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* The ticket acquired by `krb_mk_req' is returned in `ticket' and the
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* authenticator in `buf'.
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* Options control the behaviour (see krb_sendauth).
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*/
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int
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krb_mk_auth(int32_t options,
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KTEXT ticket,
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char *service,
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char *instance,
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char *realm,
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u_int32_t checksum,
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char *version,
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KTEXT buf)
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{
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char realinst[INST_SZ];
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char realrealm[REALM_SZ];
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int ret;
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char *tmp;
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if (options & KOPT_DONT_CANON)
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tmp = instance;
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else
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tmp = krb_get_phost (instance);
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strlcpy(realinst, tmp, sizeof(realinst));
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if (realm == NULL) {
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ret = krb_get_lrealm (realrealm, 1);
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if (ret != KSUCCESS)
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return ret;
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realm = realrealm;
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}
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if(!(options & KOPT_DONT_MK_REQ)) {
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ret = krb_mk_req (ticket, service, realinst, realm, checksum);
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if (ret != KSUCCESS)
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return ret;
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}
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{
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int tmp;
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size_t rem = sizeof(buf->dat);
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unsigned char *p = buf->dat;
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p = buf->dat;
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if (rem < 2 * KRB_SENDAUTH_VLEN)
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return KFAILURE;
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memcpy (p, KRB_SENDAUTH_VERS, KRB_SENDAUTH_VLEN);
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p += KRB_SENDAUTH_VLEN;
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rem -= KRB_SENDAUTH_VLEN;
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memcpy (p, version, KRB_SENDAUTH_VLEN);
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p += KRB_SENDAUTH_VLEN;
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rem -= KRB_SENDAUTH_VLEN;
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tmp = krb_put_int(ticket->length, p, rem, 4);
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if (tmp < 0)
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return KFAILURE;
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p += tmp;
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rem -= tmp;
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if (rem < ticket->length)
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return KFAILURE;
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memcpy(p, ticket->dat, ticket->length);
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p += ticket->length;
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rem -= ticket->length;
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buf->length = p - buf->dat;
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}
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return KSUCCESS;
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}
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