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/*
* Copyright 1994 by OpenVision Technologies, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of OpenVision not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. OpenVision makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "krb5.h"
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#if TARGET_OS_MAC
#include <Kerberos/krb.h>
#include <Kerberos/krb524.h>
#else
#include <krb.h>
#include "krb524.h"
#endif
krb5_error_code krb524_convert_creds_plain
KRB5_PROTOTYPE((krb5_context context, krb5_creds *v5creds,
CREDENTIALS *v4creds));
krb5_error_code krb524_sendto_kdc
KRB5_PROTOTYPE((krb5_context context, const krb5_data *message,
krb5_data *realm, krb5_data *reply,
struct sockaddr *local_addr, int *addrlen));
krb5_error_code
krb524_convert_creds_kdc(context, v5creds, v4creds)
krb5_context context;
krb5_creds *v5creds;
CREDENTIALS *v4creds;
{
krb5_error_code ret;
krb5_data reply;
char *p;
struct sockaddr_in local_addr; /* Ask for an IPv4 address */
int addrlen = sizeof (local_addr);
ret = krb524_convert_creds_plain(context, v5creds, v4creds);
if (ret)
return ret;
reply.data = NULL;
ret = krb524_sendto_kdc(context, &v5creds->ticket,
&v5creds->server->realm, &reply,
(struct sockaddr *)&local_addr, &addrlen);
if (ret)
return ret;
#if TARGET_OS_MAC
/* On the Mac, we need our local address used to talk to the KDC
because we use this to determine validity of v4 tickets. */
if ((addrlen == sizeof (struct sockaddr_in))
&& (local_addr.sin_family == AF_INET)) {
v4creds->address = local_addr.sin_addr.s_addr;
}
#endif
p = reply.data;
ret = ntohl(*((krb5_error_code *) p));
p += sizeof(krb5_error_code);
reply.length -= sizeof(krb5_error_code);
if (ret)
goto fail;
v4creds->kvno = ntohl(*((krb5_error_code *) p));
p += sizeof(int);
reply.length -= sizeof(int);
ret = decode_v4tkt(&v4creds->ticket_st, p, &reply.length);
fail:
if (reply.data)
free(reply.data);
reply.data = NULL;
return ret;
}
#if 0
int broken()
{
if ((ret = krb5_locate_kdc(context, &v5creds->server->realm, &addrs,
&naddrs)))
return ret;
if (naddrs == 0)
ret = KRB5_KDC_UNREACH;
else {
for (i = 0; i<naddrs; i++) {
addrs[i].sin_port = 0; /* use krb524 default port */
ret = krb524_convert_creds_addr(context, v5creds, v4creds,
(struct sockaddr *) &addrs[i]);
/* stop trying on success */
if (!ret) break;
switch(ret) {
case ECONNREFUSED:
case ENETUNREACH:
case ENETDOWN:
case ETIMEDOUT:
case EHOSTDOWN:
case EHOSTUNREACH:
case KRB524_NOTRESP:
continue;
default:
break; /* out of switch */
}
/* if we fall through to here, it wasn't an "ok" error */
break;
}
}
free(addrs);
return ret;
}
#endif
krb5_error_code
krb524_convert_creds_plain(context, v5creds, v4creds)
krb5_context context;
krb5_creds *v5creds;
CREDENTIALS *v4creds;
{
#if 0
krb5_ui_4 addr;
#endif
int ret;
krb5_timestamp lifetime;
memset((char *) v4creds, 0, sizeof(CREDENTIALS));
if ((ret = krb524_convert_princs(context, v5creds->client,
v5creds->server,
v4creds->pname, v4creds->pinst,
v4creds->realm, v4creds->service,
v4creds->instance)))
return ret;
/* Check enctype too */
if (v5creds->keyblock.length != sizeof(C_Block)) {
if (krb524_debug)
fprintf(stderr, "v5 session keyblock length %d != C_Block size %d\n",
v5creds->keyblock.length,
(int) sizeof(C_Block));
return KRB524_BADKEY;
} else
memcpy(v4creds->session, (char *) v5creds->keyblock.contents,
sizeof(C_Block));
/* V4 has no concept of authtime or renew_till, so ignore them */
/* V4 lifetime is 1 byte, in 5 minute increments */
#if TARGET_OS_MAC
/* krb4 long lifetime support --- how should this be done on Unix? */
v4creds->lifetime = krb_time_to_life (v5creds->times.starttime,
v5creds->times.endtime);
#else
lifetime =
((v5creds->times.endtime - v5creds->times.starttime) / 300);
v4creds->lifetime =
((lifetime > 0xff) ? 0xff : lifetime);
#endif
v4creds->issue_date = v5creds->times.starttime;
#if 0
/* XXX perhaps we should use the addr of the client host if */
/* v5creds contains more than one addr. Q: Does V4 support */
/* non-INET addresses? */
if (!v5creds->addresses || !v5creds->addresses[0] ||
v5creds->addresses[0]->addrtype != ADDRTYPE_INET ||
v5creds->addresses[0]->length != sizeof(addr)) {
if (krb524_debug)
fprintf(stderr, "Invalid v5creds address information.\n");
return KRB524_BADADDR;
} else
memcpy((char *) &addr, v5creds->addresses[0]->contents,
sizeof(addr));
#endif
return 0;
}
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