882 lines
22 KiB
C
882 lines
22 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. 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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* 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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* 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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* 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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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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/*
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* Copyright (C) 1990 by the Massachusetts Institute of Technology
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*
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* Export of this software from the United States of America may
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* require a specific license from the United States Government.
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* It is the responsibility of any person or organization contemplating
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* export to obtain such a license before exporting.
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*
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* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
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* distribute this software and its documentation for any purpose and
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* without fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright notice and
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* this permission notice appear in supporting documentation, and that
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* the name of M.I.T. not be used in advertising or publicity pertaining
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* to distribution of the software without specific, written prior
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* permission. M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is" without express
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* or implied warranty.
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*/
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#include <config.h>
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RCSID("$Id: kerberos5.c,v 1.53.2.1 2004/06/21 08:21:07 lha Exp $");
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#ifdef KRB5
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#include <arpa/telnet.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <pwd.h>
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#define Authenticator k5_Authenticator
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#include <krb5.h>
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#undef Authenticator
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#include <roken.h>
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#ifdef SOCKS
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#include <socks.h>
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#endif
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#include "encrypt.h"
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#include "auth.h"
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#include "misc.h"
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#if defined(DCE)
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int dfsk5ok = 0;
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int dfspag = 0;
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int dfsfwd = 0;
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#endif
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int forward_flags = 0; /* Flags get set in telnet/main.c on -f and -F */
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int forward(int);
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int forwardable(int);
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/* These values need to be the same as those defined in telnet/main.c. */
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/* Either define them in both places, or put in some common header file. */
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#define OPTS_FORWARD_CREDS 0x00000002
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#define OPTS_FORWARDABLE_CREDS 0x00000001
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void kerberos5_forward (Authenticator *);
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static unsigned char str_data[4] = { IAC, SB, TELOPT_AUTHENTICATION, 0 };
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#define KRB_AUTH 0 /* Authentication data follows */
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#define KRB_REJECT 1 /* Rejected (reason might follow) */
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#define KRB_ACCEPT 2 /* Accepted */
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#define KRB_RESPONSE 3 /* Response for mutual auth. */
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#define KRB_FORWARD 4 /* Forwarded credentials follow */
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#define KRB_FORWARD_ACCEPT 5 /* Forwarded credentials accepted */
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#define KRB_FORWARD_REJECT 6 /* Forwarded credentials rejected */
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static krb5_data auth;
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static krb5_ticket *ticket;
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static krb5_context context;
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static krb5_auth_context auth_context;
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static int
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Data(Authenticator *ap, int type, void *d, int c)
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{
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unsigned char *cd = (unsigned char *)d;
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unsigned char *p0, *p;
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size_t len = sizeof(str_data) + 3 + 2;
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int ret;
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if (c == -1)
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c = strlen((char*)cd);
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for (p = cd; p - cd < c; p++, len++)
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if (*p == IAC)
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len++;
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p0 = malloc(len);
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if (p0 == NULL)
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return 0;
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memcpy(p0, str_data, sizeof(str_data));
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p = p0 + sizeof(str_data);
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if (auth_debug_mode) {
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printf("%s:%d: [%d] (%d)",
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str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
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str_data[3],
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type, c);
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printd(d, c);
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printf("\r\n");
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}
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*p++ = ap->type;
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*p++ = ap->way;
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*p++ = type;
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while (c-- > 0) {
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if ((*p++ = *cd++) == IAC)
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*p++ = IAC;
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}
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*p++ = IAC;
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*p++ = SE;
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if (str_data[3] == TELQUAL_IS)
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printsub('>', &p0[2], len - 2);
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ret = telnet_net_write(p0, len);
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free(p0);
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return ret;
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}
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int
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kerberos5_init(Authenticator *ap, int server)
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{
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krb5_error_code ret;
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ret = krb5_init_context(&context);
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if (ret)
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return 0;
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if (server) {
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krb5_keytab kt;
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krb5_kt_cursor cursor;
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ret = krb5_kt_default(context, &kt);
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if (ret)
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return 0;
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ret = krb5_kt_start_seq_get (context, kt, &cursor);
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if (ret) {
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krb5_kt_close (context, kt);
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return 0;
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}
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krb5_kt_end_seq_get (context, kt, &cursor);
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krb5_kt_close (context, kt);
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str_data[3] = TELQUAL_REPLY;
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} else
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str_data[3] = TELQUAL_IS;
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return(1);
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}
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extern int net;
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static int
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kerberos5_send(char *name, Authenticator *ap)
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{
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krb5_error_code ret;
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krb5_ccache ccache;
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int ap_opts;
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krb5_data cksum_data;
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char foo[2];
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if (!UserNameRequested) {
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if (auth_debug_mode) {
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printf("Kerberos V5: no user name supplied\r\n");
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}
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return(0);
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}
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ret = krb5_cc_default(context, &ccache);
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if (ret) {
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if (auth_debug_mode) {
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printf("Kerberos V5: could not get default ccache: %s\r\n",
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krb5_get_err_text (context, ret));
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}
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return 0;
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}
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if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL)
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ap_opts = AP_OPTS_MUTUAL_REQUIRED;
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else
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ap_opts = 0;
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ap_opts |= AP_OPTS_USE_SUBKEY;
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ret = krb5_auth_con_init (context, &auth_context);
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if (ret) {
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if (auth_debug_mode) {
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printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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}
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return(0);
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}
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ret = krb5_auth_con_setaddrs_from_fd (context,
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auth_context,
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&net);
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if (ret) {
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if (auth_debug_mode) {
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printf ("Kerberos V5:"
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" krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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}
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return(0);
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}
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krb5_auth_con_setkeytype (context, auth_context, KEYTYPE_DES);
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foo[0] = ap->type;
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foo[1] = ap->way;
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cksum_data.length = sizeof(foo);
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cksum_data.data = foo;
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{
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krb5_principal service;
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char sname[128];
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ret = krb5_sname_to_principal (context,
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RemoteHostName,
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NULL,
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KRB5_NT_SRV_HST,
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&service);
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if(ret) {
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if (auth_debug_mode) {
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printf ("Kerberos V5:"
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" krb5_sname_to_principal(%s) failed (%s)\r\n",
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RemoteHostName, krb5_get_err_text(context, ret));
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}
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return 0;
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}
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ret = krb5_unparse_name_fixed(context, service, sname, sizeof(sname));
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if(ret) {
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if (auth_debug_mode) {
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printf ("Kerberos V5:"
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" krb5_unparse_name_fixed failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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}
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return 0;
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}
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printf("[ Trying %s (%s)... ]\r\n", name, sname);
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ret = krb5_mk_req_exact(context, &auth_context, ap_opts,
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service,
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&cksum_data, ccache, &auth);
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krb5_free_principal (context, service);
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}
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if (ret) {
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if (1 || auth_debug_mode) {
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printf("Kerberos V5: mk_req failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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}
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return(0);
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}
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if (!auth_sendname((unsigned char *)UserNameRequested,
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strlen(UserNameRequested))) {
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if (auth_debug_mode)
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printf("Not enough room for user name\r\n");
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return(0);
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}
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if (!Data(ap, KRB_AUTH, auth.data, auth.length)) {
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if (auth_debug_mode)
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printf("Not enough room for authentication data\r\n");
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return(0);
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}
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if (auth_debug_mode) {
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printf("Sent Kerberos V5 credentials to server\r\n");
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}
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return(1);
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}
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int
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kerberos5_send_mutual(Authenticator *ap)
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{
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return kerberos5_send("mutual KERBEROS5", ap);
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}
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int
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kerberos5_send_oneway(Authenticator *ap)
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{
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return kerberos5_send("KERBEROS5", ap);
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}
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void
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kerberos5_is(Authenticator *ap, unsigned char *data, int cnt)
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{
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krb5_error_code ret;
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krb5_data outbuf;
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krb5_keyblock *key_block;
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char *name;
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krb5_principal server;
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int zero = 0;
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if (cnt-- < 1)
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return;
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switch (*data++) {
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case KRB_AUTH:
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auth.data = (char *)data;
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auth.length = cnt;
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auth_context = NULL;
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ret = krb5_auth_con_init (context, &auth_context);
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if (ret) {
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Data(ap, KRB_REJECT, "krb5_auth_con_init failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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ret = krb5_auth_con_setaddrs_from_fd (context,
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auth_context,
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&zero);
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if (ret) {
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Data(ap, KRB_REJECT, "krb5_auth_con_setaddrs_from_fd failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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ret = krb5_sock_to_principal (context,
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0,
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"host",
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KRB5_NT_SRV_HST,
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&server);
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if (ret) {
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Data(ap, KRB_REJECT, "krb5_sock_to_principal failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_sock_to_principal failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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ret = krb5_rd_req(context,
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&auth_context,
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&auth,
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server,
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NULL,
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NULL,
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&ticket);
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krb5_free_principal (context, server);
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if (ret) {
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char *errbuf;
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asprintf(&errbuf,
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"Read req failed: %s",
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krb5_get_err_text(context, ret));
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Data(ap, KRB_REJECT, errbuf, -1);
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if (auth_debug_mode)
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printf("%s\r\n", errbuf);
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free (errbuf);
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return;
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}
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{
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char foo[2];
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foo[0] = ap->type;
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foo[1] = ap->way;
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ret = krb5_verify_authenticator_checksum(context,
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auth_context,
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foo,
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sizeof(foo));
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if (ret) {
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char *errbuf;
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asprintf(&errbuf, "Bad checksum: %s",
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krb5_get_err_text(context, ret));
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Data(ap, KRB_REJECT, errbuf, -1);
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if (auth_debug_mode)
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printf ("%s\r\n", errbuf);
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free(errbuf);
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return;
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}
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}
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ret = krb5_auth_con_getremotesubkey (context,
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auth_context,
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&key_block);
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if (ret) {
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Data(ap, KRB_REJECT, "krb5_auth_con_getremotesubkey failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_auth_con_getremotesubkey failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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if (key_block == NULL) {
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ret = krb5_auth_con_getkey(context,
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auth_context,
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&key_block);
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}
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if (ret) {
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Data(ap, KRB_REJECT, "krb5_auth_con_getkey failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_auth_con_getkey failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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if (key_block == NULL) {
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Data(ap, KRB_REJECT, "no subkey received", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_auth_con_getremotesubkey returned NULL key\r\n");
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return;
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}
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if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
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ret = krb5_mk_rep(context, auth_context, &outbuf);
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if (ret) {
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Data(ap, KRB_REJECT,
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"krb5_mk_rep failed", -1);
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auth_finished(ap, AUTH_REJECT);
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if (auth_debug_mode)
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printf("Kerberos V5: "
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"krb5_mk_rep failed (%s)\r\n",
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krb5_get_err_text(context, ret));
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return;
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}
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Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length);
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}
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if (krb5_unparse_name(context, ticket->client, &name))
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name = 0;
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if(UserNameRequested && krb5_kuserok(context,
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ticket->client,
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UserNameRequested)) {
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Data(ap, KRB_ACCEPT, name, name ? -1 : 0);
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if (auth_debug_mode) {
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printf("Kerberos5 identifies him as ``%s''\r\n",
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name ? name : "");
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}
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if(key_block->keytype == ETYPE_DES_CBC_MD5 ||
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key_block->keytype == ETYPE_DES_CBC_MD4 ||
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key_block->keytype == ETYPE_DES_CBC_CRC) {
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Session_Key skey;
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skey.type = SK_DES;
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skey.length = 8;
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skey.data = key_block->keyvalue.data;
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encrypt_session_key(&skey, 0);
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}
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} else {
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char *msg;
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asprintf (&msg, "user `%s' is not authorized to "
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"login as `%s'",
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name ? name : "<unknown>",
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UserNameRequested ? UserNameRequested : "<nobody>");
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if (msg == NULL)
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Data(ap, KRB_REJECT, NULL, 0);
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else {
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Data(ap, KRB_REJECT, (void *)msg, -1);
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free(msg);
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}
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auth_finished (ap, AUTH_REJECT);
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krb5_free_keyblock_contents(context, key_block);
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break;
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}
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auth_finished(ap, AUTH_USER);
|
|
krb5_free_keyblock_contents(context, key_block);
|
|
|
|
break;
|
|
case KRB_FORWARD: {
|
|
struct passwd *pwd;
|
|
char ccname[1024]; /* XXX */
|
|
krb5_data inbuf;
|
|
krb5_ccache ccache;
|
|
inbuf.data = (char *)data;
|
|
inbuf.length = cnt;
|
|
|
|
pwd = getpwnam (UserNameRequested);
|
|
if (pwd == NULL)
|
|
break;
|
|
|
|
snprintf (ccname, sizeof(ccname),
|
|
"FILE:/tmp/krb5cc_%u", pwd->pw_uid);
|
|
|
|
ret = krb5_cc_resolve (context, ccname, &ccache);
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("Kerberos V5: could not get ccache: %s\r\n",
|
|
krb5_get_err_text(context, ret));
|
|
break;
|
|
}
|
|
|
|
ret = krb5_cc_initialize (context,
|
|
ccache,
|
|
ticket->client);
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("Kerberos V5: could not init ccache: %s\r\n",
|
|
krb5_get_err_text(context, ret));
|
|
break;
|
|
}
|
|
|
|
#if defined(DCE)
|
|
esetenv("KRB5CCNAME", ccname, 1);
|
|
#endif
|
|
ret = krb5_rd_cred2 (context,
|
|
auth_context,
|
|
ccache,
|
|
&inbuf);
|
|
if(ret) {
|
|
char *errbuf;
|
|
|
|
asprintf (&errbuf,
|
|
"Read forwarded creds failed: %s",
|
|
krb5_get_err_text (context, ret));
|
|
if(errbuf == NULL)
|
|
Data(ap, KRB_FORWARD_REJECT, NULL, 0);
|
|
else
|
|
Data(ap, KRB_FORWARD_REJECT, errbuf, -1);
|
|
if (auth_debug_mode)
|
|
printf("Could not read forwarded credentials: %s\r\n",
|
|
errbuf);
|
|
free (errbuf);
|
|
} else {
|
|
Data(ap, KRB_FORWARD_ACCEPT, 0, 0);
|
|
#if defined(DCE)
|
|
dfsfwd = 1;
|
|
#endif
|
|
}
|
|
chown (ccname + 5, pwd->pw_uid, -1);
|
|
if (auth_debug_mode)
|
|
printf("Forwarded credentials obtained\r\n");
|
|
break;
|
|
}
|
|
default:
|
|
if (auth_debug_mode)
|
|
printf("Unknown Kerberos option %d\r\n", data[-1]);
|
|
Data(ap, KRB_REJECT, 0, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
kerberos5_reply(Authenticator *ap, unsigned char *data, int cnt)
|
|
{
|
|
static int mutual_complete = 0;
|
|
|
|
if (cnt-- < 1)
|
|
return;
|
|
switch (*data++) {
|
|
case KRB_REJECT:
|
|
if (cnt > 0) {
|
|
printf("[ Kerberos V5 refuses authentication because %.*s ]\r\n",
|
|
cnt, data);
|
|
} else
|
|
printf("[ Kerberos V5 refuses authentication ]\r\n");
|
|
auth_send_retry();
|
|
return;
|
|
case KRB_ACCEPT: {
|
|
krb5_error_code ret;
|
|
Session_Key skey;
|
|
krb5_keyblock *keyblock;
|
|
|
|
if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL &&
|
|
!mutual_complete) {
|
|
printf("[ Kerberos V5 accepted you, but didn't provide mutual authentication! ]\r\n");
|
|
auth_send_retry();
|
|
return;
|
|
}
|
|
if (cnt)
|
|
printf("[ Kerberos V5 accepts you as ``%.*s'' ]\r\n", cnt, data);
|
|
else
|
|
printf("[ Kerberos V5 accepts you ]\r\n");
|
|
|
|
ret = krb5_auth_con_getlocalsubkey (context,
|
|
auth_context,
|
|
&keyblock);
|
|
if (ret)
|
|
ret = krb5_auth_con_getkey (context,
|
|
auth_context,
|
|
&keyblock);
|
|
if(ret) {
|
|
printf("[ krb5_auth_con_getkey: %s ]\r\n",
|
|
krb5_get_err_text(context, ret));
|
|
auth_send_retry();
|
|
return;
|
|
}
|
|
|
|
skey.type = SK_DES;
|
|
skey.length = 8;
|
|
skey.data = keyblock->keyvalue.data;
|
|
encrypt_session_key(&skey, 0);
|
|
krb5_free_keyblock_contents (context, keyblock);
|
|
auth_finished(ap, AUTH_USER);
|
|
if (forward_flags & OPTS_FORWARD_CREDS)
|
|
kerberos5_forward(ap);
|
|
break;
|
|
}
|
|
case KRB_RESPONSE:
|
|
if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
|
|
/* the rest of the reply should contain a krb_ap_rep */
|
|
krb5_ap_rep_enc_part *reply;
|
|
krb5_data inbuf;
|
|
krb5_error_code ret;
|
|
|
|
inbuf.length = cnt;
|
|
inbuf.data = (char *)data;
|
|
|
|
ret = krb5_rd_rep(context, auth_context, &inbuf, &reply);
|
|
if (ret) {
|
|
printf("[ Mutual authentication failed: %s ]\r\n",
|
|
krb5_get_err_text (context, ret));
|
|
auth_send_retry();
|
|
return;
|
|
}
|
|
krb5_free_ap_rep_enc_part(context, reply);
|
|
mutual_complete = 1;
|
|
}
|
|
return;
|
|
case KRB_FORWARD_ACCEPT:
|
|
printf("[ Kerberos V5 accepted forwarded credentials ]\r\n");
|
|
return;
|
|
case KRB_FORWARD_REJECT:
|
|
printf("[ Kerberos V5 refuses forwarded credentials because %.*s ]\r\n",
|
|
cnt, data);
|
|
return;
|
|
default:
|
|
if (auth_debug_mode)
|
|
printf("Unknown Kerberos option %d\r\n", data[-1]);
|
|
return;
|
|
}
|
|
}
|
|
|
|
int
|
|
kerberos5_status(Authenticator *ap, char *name, size_t name_sz, int level)
|
|
{
|
|
if (level < AUTH_USER)
|
|
return(level);
|
|
|
|
if (UserNameRequested &&
|
|
krb5_kuserok(context,
|
|
ticket->client,
|
|
UserNameRequested))
|
|
{
|
|
strlcpy(name, UserNameRequested, name_sz);
|
|
#if defined(DCE)
|
|
dfsk5ok = 1;
|
|
#endif
|
|
return(AUTH_VALID);
|
|
} else
|
|
return(AUTH_USER);
|
|
}
|
|
|
|
#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);}
|
|
#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);}
|
|
|
|
void
|
|
kerberos5_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
|
|
{
|
|
int i;
|
|
|
|
buf[buflen-1] = '\0'; /* make sure its NULL terminated */
|
|
buflen -= 1;
|
|
|
|
switch(data[3]) {
|
|
case KRB_REJECT: /* Rejected (reason might follow) */
|
|
strlcpy((char *)buf, " REJECT ", buflen);
|
|
goto common;
|
|
|
|
case KRB_ACCEPT: /* Accepted (name might follow) */
|
|
strlcpy((char *)buf, " ACCEPT ", buflen);
|
|
common:
|
|
BUMP(buf, buflen);
|
|
if (cnt <= 4)
|
|
break;
|
|
ADDC(buf, buflen, '"');
|
|
for (i = 4; i < cnt; i++)
|
|
ADDC(buf, buflen, data[i]);
|
|
ADDC(buf, buflen, '"');
|
|
ADDC(buf, buflen, '\0');
|
|
break;
|
|
|
|
|
|
case KRB_AUTH: /* Authentication data follows */
|
|
strlcpy((char *)buf, " AUTH", buflen);
|
|
goto common2;
|
|
|
|
case KRB_RESPONSE:
|
|
strlcpy((char *)buf, " RESPONSE", buflen);
|
|
goto common2;
|
|
|
|
case KRB_FORWARD: /* Forwarded credentials follow */
|
|
strlcpy((char *)buf, " FORWARD", buflen);
|
|
goto common2;
|
|
|
|
case KRB_FORWARD_ACCEPT: /* Forwarded credentials accepted */
|
|
strlcpy((char *)buf, " FORWARD_ACCEPT", buflen);
|
|
goto common2;
|
|
|
|
case KRB_FORWARD_REJECT: /* Forwarded credentials rejected */
|
|
/* (reason might follow) */
|
|
strlcpy((char *)buf, " FORWARD_REJECT", buflen);
|
|
goto common2;
|
|
|
|
default:
|
|
snprintf((char*)buf, buflen, " %d (unknown)", data[3]);
|
|
common2:
|
|
BUMP(buf, buflen);
|
|
for (i = 4; i < cnt; i++) {
|
|
snprintf((char*)buf, buflen, " %d", data[i]);
|
|
BUMP(buf, buflen);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
kerberos5_forward(Authenticator *ap)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_ccache ccache;
|
|
krb5_creds creds;
|
|
krb5_kdc_flags flags;
|
|
krb5_data out_data;
|
|
krb5_principal principal;
|
|
|
|
ret = krb5_cc_default (context, &ccache);
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("KerberosV5: could not get default ccache: %s\r\n",
|
|
krb5_get_err_text (context, ret));
|
|
return;
|
|
}
|
|
|
|
ret = krb5_cc_get_principal (context, ccache, &principal);
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("KerberosV5: could not get principal: %s\r\n",
|
|
krb5_get_err_text (context, ret));
|
|
return;
|
|
}
|
|
|
|
memset (&creds, 0, sizeof(creds));
|
|
|
|
creds.client = principal;
|
|
|
|
ret = krb5_build_principal (context,
|
|
&creds.server,
|
|
strlen(principal->realm),
|
|
principal->realm,
|
|
"krbtgt",
|
|
principal->realm,
|
|
NULL);
|
|
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("KerberosV5: could not get principal: %s\r\n",
|
|
krb5_get_err_text (context, ret));
|
|
return;
|
|
}
|
|
|
|
creds.times.endtime = 0;
|
|
|
|
flags.i = 0;
|
|
flags.b.forwarded = 1;
|
|
if (forward_flags & OPTS_FORWARDABLE_CREDS)
|
|
flags.b.forwardable = 1;
|
|
|
|
ret = krb5_get_forwarded_creds (context,
|
|
auth_context,
|
|
ccache,
|
|
flags.i,
|
|
RemoteHostName,
|
|
&creds,
|
|
&out_data);
|
|
if (ret) {
|
|
if (auth_debug_mode)
|
|
printf ("Kerberos V5: error getting forwarded creds: %s\r\n",
|
|
krb5_get_err_text (context, ret));
|
|
return;
|
|
}
|
|
|
|
if(!Data(ap, KRB_FORWARD, out_data.data, out_data.length)) {
|
|
if (auth_debug_mode)
|
|
printf("Not enough room for authentication data\r\n");
|
|
} else {
|
|
if (auth_debug_mode)
|
|
printf("Forwarded local Kerberos V5 credentials to server\r\n");
|
|
}
|
|
}
|
|
|
|
#if defined(DCE)
|
|
/* if this was a K5 authentication try and join a PAG for the user. */
|
|
void
|
|
kerberos5_dfspag(void)
|
|
{
|
|
if (dfsk5ok) {
|
|
dfspag = krb5_dfs_pag(context, dfsfwd, ticket->client,
|
|
UserNameRequested);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int
|
|
kerberos5_set_forward(int on)
|
|
{
|
|
if(on == 0)
|
|
forward_flags &= ~OPTS_FORWARD_CREDS;
|
|
if(on == 1)
|
|
forward_flags |= OPTS_FORWARD_CREDS;
|
|
if(on == -1)
|
|
forward_flags ^= OPTS_FORWARD_CREDS;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
kerberos5_set_forwardable(int on)
|
|
{
|
|
if(on == 0)
|
|
forward_flags &= ~OPTS_FORWARDABLE_CREDS;
|
|
if(on == 1)
|
|
forward_flags |= OPTS_FORWARDABLE_CREDS;
|
|
if(on == -1)
|
|
forward_flags ^= OPTS_FORWARDABLE_CREDS;
|
|
return 0;
|
|
}
|
|
|
|
#endif /* KRB5 */
|