2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 RCSID("$Id: mk_auth.c,v 1.8 1999/12/02 16:58:43 joda Exp $");
39 * Generate an authenticator for service.instance@realm.
40 * instance is canonicalized by `krb_get_phost'
41 * realm is set to the local realm if realm == NULL
42 * The ticket acquired by `krb_mk_req' is returned in `ticket' and the
43 * authenticator in `buf'.
44 * Options control the behaviour (see krb_sendauth).
48 krb_mk_auth(int32_t options,
57 char realinst[INST_SZ];
58 char realrealm[REALM_SZ];
62 if (options & KOPT_DONT_CANON)
65 tmp = krb_get_phost (instance);
67 strlcpy(realinst, tmp, sizeof(realinst));
70 ret = krb_get_lrealm (realrealm, 1);
76 if(!(options & KOPT_DONT_MK_REQ)) {
77 ret = krb_mk_req (ticket, service, realinst, realm, checksum);
84 size_t rem = sizeof(buf->dat);
85 unsigned char *p = buf->dat;
89 if (rem < 2 * KRB_SENDAUTH_VLEN)
91 memcpy (p, KRB_SENDAUTH_VERS, KRB_SENDAUTH_VLEN);
92 p += KRB_SENDAUTH_VLEN;
93 rem -= KRB_SENDAUTH_VLEN;
95 memcpy (p, version, KRB_SENDAUTH_VLEN);
96 p += KRB_SENDAUTH_VLEN;
97 rem -= KRB_SENDAUTH_VLEN;
99 tmp = krb_put_int(ticket->length, p, rem, 4);
105 if (rem < ticket->length)
107 memcpy(p, ticket->dat, ticket->length);
109 rem -= ticket->length;
110 buf->length = p - buf->dat;