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-rw-r--r--secure/lib/libtelnet/kerberos5.c762
1 files changed, 762 insertions, 0 deletions
diff --git a/secure/lib/libtelnet/kerberos5.c b/secure/lib/libtelnet/kerberos5.c
new file mode 100644
index 0000000..d2eb34f
--- /dev/null
+++ b/secure/lib/libtelnet/kerberos5.c
@@ -0,0 +1,762 @@
+/*
+ * $Source: /home/ncvs/src/lib/libtelnet/kerberos5.c,v $
+ * $Author: rgrimes $
+ * $Id: kerberos5.c,v 1.1.1.1 1994/05/27 05:00:20 rgrimes Exp $
+ */
+
+#if !defined(lint) && !defined(SABER)
+static
+#ifdef __STDC__
+const
+#endif
+char rcsid_kerberos5_c[] = "$Id: kerberos5.c,v 1.1.1.1 1994/05/27 05:00:20 rgrimes Exp $";
+#endif /* lint */
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)kerberos5.c 8.2 (Berkeley) 12/15/93";
+#endif /* not lint */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ */
+
+
+#ifdef KRB5
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include <krb5/krb5.h>
+#include <krb5/asn1.h>
+#include <krb5/crc-32.h>
+#include <krb5/los-proto.h>
+#include <krb5/ext-proto.h>
+#include <com_err.h>
+#include <netdb.h>
+#include <ctype.h>
+
+/* kerberos 5 include files (ext-proto.h) will get an appropriate stdlib.h
+ and string.h/strings.h */
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+extern auth_debug_mode;
+
+#ifdef FORWARD
+int forward_flags = 0; /* Flags get set in telnet/main.c on -f and -F */
+
+/* These values need to be the same as those defined in telnet/main.c. */
+/* Either define them in both places, or put in some common header file. */
+#define OPTS_FORWARD_CREDS 0x00000002
+#define OPTS_FORWARDABLE_CREDS 0x00000001
+
+void kerberos5_forward();
+
+#endif /* FORWARD */
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+ AUTHTYPE_KERBEROS_V5, };
+/*static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
+ TELQUAL_NAME, };*/
+
+#define KRB_AUTH 0 /* Authentication data follows */
+#define KRB_REJECT 1 /* Rejected (reason might follow) */
+#define KRB_ACCEPT 2 /* Accepted */
+#define KRB_RESPONSE 3 /* Response for mutual auth. */
+
+#ifdef FORWARD
+#define KRB_FORWARD 4 /* Forwarded credentials follow */
+#define KRB_FORWARD_ACCEPT 5 /* Forwarded credentials accepted */
+#define KRB_FORWARD_REJECT 6 /* Forwarded credentials rejected */
+#endif /* FORWARD */
+
+static krb5_data auth;
+ /* telnetd gets session key from here */
+static krb5_tkt_authent *authdat = NULL;
+/* telnet matches the AP_REQ and AP_REP with this */
+static krb5_authenticator authenticator;
+
+/* some compilers can't hack void *, so we use the Kerberos krb5_pointer,
+ which is either void * or char *, depending on the compiler. */
+
+#define Voidptr krb5_pointer
+
+Block session_key;
+
+ static int
+Data(ap, type, d, c)
+ Authenticator *ap;
+ int type;
+ Voidptr d;
+ int c;
+{
+ unsigned char *p = str_data + 4;
+ unsigned char *cd = (unsigned char *)d;
+
+ if (c == -1)
+ c = strlen((char *)cd);
+
+ if (auth_debug_mode) {
+ printf("%s:%d: [%d] (%d)",
+ str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+ str_data[3],
+ type, c);
+ printd(d, c);
+ printf("\r\n");
+ }
+ *p++ = ap->type;
+ *p++ = ap->way;
+ *p++ = type;
+ while (c-- > 0) {
+ if ((*p++ = *cd++) == IAC)
+ *p++ = IAC;
+ }
+ *p++ = IAC;
+ *p++ = SE;
+ if (str_data[3] == TELQUAL_IS)
+ printsub('>', &str_data[2], p - &str_data[2]);
+ return(net_write(str_data, p - str_data));
+}
+
+ int
+kerberos5_init(ap, server)
+ Authenticator *ap;
+ int server;
+{
+ if (server)
+ str_data[3] = TELQUAL_REPLY;
+ else
+ str_data[3] = TELQUAL_IS;
+ krb5_init_ets();
+ return(1);
+}
+
+ int
+kerberos5_send(ap)
+ Authenticator *ap;
+{
+ char **realms;
+ char *name;
+ char *p1, *p2;
+ krb5_checksum ksum;
+ krb5_octet sum[CRC32_CKSUM_LENGTH];
+ krb5_principal server;
+ krb5_error_code r;
+ krb5_ccache ccache;
+ krb5_creds creds; /* telnet gets session key from here */
+ extern krb5_flags krb5_kdc_default_options;
+ int ap_opts;
+
+#ifdef ENCRYPTION
+ krb5_keyblock *newkey = 0;
+#endif /* ENCRYPTION */
+
+ ksum.checksum_type = CKSUMTYPE_CRC32;
+ ksum.contents = sum;
+ ksum.length = sizeof(sum);
+ bzero((Voidptr )sum, sizeof(sum));
+
+ if (!UserNameRequested) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: no user name supplied\r\n");
+ }
+ return(0);
+ }
+
+ if (r = krb5_cc_default(&ccache)) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: could not get default ccache\r\n");
+ }
+ return(0);
+ }
+
+ if ((name = malloc(strlen(RemoteHostName)+1)) == NULL) {
+ if (auth_debug_mode)
+ printf("Out of memory for hostname in Kerberos V5\r\n");
+ return(0);
+ }
+
+ if (r = krb5_get_host_realm(RemoteHostName, &realms)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: no realm for %s\r\n", RemoteHostName);
+ free(name);
+ return(0);
+ }
+
+ p1 = RemoteHostName;
+ p2 = name;
+
+ while (*p2 = *p1++) {
+ if (isupper(*p2))
+ *p2 |= 040;
+ ++p2;
+ }
+
+ if (r = krb5_build_principal_ext(&server,
+ strlen(realms[0]), realms[0],
+ 4, "host",
+ p2 - name, name,
+ 0)) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: failure setting up principal (%s)\r\n",
+ error_message(r));
+ }
+ free(name);
+ krb5_free_host_realm(realms);
+ return(0);
+ }
+
+
+ bzero((char *)&creds, sizeof(creds));
+ creds.server = server;
+
+ if (r = krb5_cc_get_principal(ccache, &creds.client)) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: failure on principal (%s)\r\n",
+ error_message(r));
+ }
+ free(name);
+ krb5_free_principal(server);
+ krb5_free_host_realm(realms);
+ return(0);
+ }
+
+ if (r = krb5_get_credentials(krb5_kdc_default_options, ccache, &creds)) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: failure on credentials(%d)\r\n",r);
+ }
+ free(name);
+ krb5_free_host_realm(realms);
+ krb5_free_principal(server);
+ return(0);
+ }
+
+ if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL)
+ ap_opts = AP_OPTS_MUTUAL_REQUIRED;
+ else
+ ap_opts = 0;
+
+ r = krb5_mk_req_extended(ap_opts, &ksum, krb5_kdc_default_options, 0,
+#ifdef ENCRYPTION
+ &newkey,
+#else /* ENCRYPTION */
+ 0,
+#endif /* ENCRYPTION */
+ ccache, &creds, &authenticator, &auth);
+ /* don't let the key get freed if we clean up the authenticator */
+ authenticator.subkey = 0;
+
+ free(name);
+ krb5_free_host_realm(realms);
+ krb5_free_principal(server);
+#ifdef ENCRYPTION
+ if (newkey) {
+ /* keep the key in our private storage, but don't use it
+ yet---see kerberos5_reply() below */
+ if (newkey->keytype != KEYTYPE_DES) {
+ if (creds.keyblock.keytype == KEYTYPE_DES)
+ /* use the session key in credentials instead */
+ memcpy((char *)session_key,
+ (char *)creds.keyblock.contents, sizeof(Block));
+ else
+ /* XXX ? */;
+ } else {
+ memcpy((char *)session_key, (char *)newkey->contents,
+ sizeof(Block));
+ }
+ krb5_free_keyblock(newkey);
+ }
+#endif /* ENCRYPTION */
+ if (r) {
+ if (auth_debug_mode) {
+ printf("Kerberos V5: mk_req failed (%s)\r\n",
+ error_message(r));
+ }
+ return(0);
+ }
+
+ if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
+ if (auth_debug_mode)
+ printf("Not enough room for user name\r\n");
+ return(0);
+ }
+ if (!Data(ap, KRB_AUTH, auth.data, auth.length)) {
+ if (auth_debug_mode)
+ printf("Not enough room for authentication data\r\n");
+ return(0);
+ }
+ if (auth_debug_mode) {
+ printf("Sent Kerberos V5 credentials to server\r\n");
+ }
+ return(1);
+}
+
+ void
+kerberos5_is(ap, data, cnt)
+ Authenticator *ap;
+ unsigned char *data;
+ int cnt;
+{
+ int r;
+ struct hostent *hp;
+ char *p1, *p2;
+ static char *realm = NULL;
+ krb5_principal server;
+ krb5_ap_rep_enc_part reply;
+ krb5_data outbuf;
+#ifdef ENCRYPTION
+ Session_Key skey;
+#endif /* ENCRYPTION */
+ char *name;
+ char *getenv();
+ krb5_data inbuf;
+
+ if (cnt-- < 1)
+ return;
+ switch (*data++) {
+ case KRB_AUTH:
+ auth.data = (char *)data;
+ auth.length = cnt;
+
+ if (!(hp = gethostbyname(LocalHostName))) {
+ if (auth_debug_mode)
+ printf("Cannot resolve local host name\r\n");
+ Data(ap, KRB_REJECT, "Unknown local hostname.", -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+
+ if (!realm && (krb5_get_default_realm(&realm))) {
+ if (auth_debug_mode)
+ printf("Could not get default realm\r\n");
+ Data(ap, KRB_REJECT, "Could not get default realm.", -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+
+ if ((name = malloc(strlen(hp->h_name)+1)) == NULL) {
+ if (auth_debug_mode)
+ printf("Out of memory for hostname in Kerberos V5\r\n");
+ Data(ap, KRB_REJECT, "Out of memory.", -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+
+ p1 = hp->h_name;
+ p2 = name;
+
+ while (*p2 = *p1++) {
+ if (isupper(*p2))
+ *p2 |= 040;
+ ++p2;
+ }
+
+ if (authdat)
+ krb5_free_tkt_authent(authdat);
+
+ r = krb5_build_principal_ext(&server,
+ strlen(realm), realm,
+ 4, "host",
+ p2 - name, name,
+ 0);
+ if (!r) {
+ r = krb5_rd_req_simple(&auth, server, 0, &authdat);
+ krb5_free_principal(server);
+ }
+ if (r) {
+ char errbuf[128];
+
+ errout:
+ authdat = 0;
+ (void) strcpy(errbuf, "Read req failed: ");
+ (void) strcat(errbuf, error_message(r));
+ Data(ap, KRB_REJECT, errbuf, -1);
+ if (auth_debug_mode)
+ printf("%s\r\n", errbuf);
+ return;
+ }
+ free(name);
+ if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+ /* do ap_rep stuff here */
+ reply.ctime = authdat->authenticator->ctime;
+ reply.cusec = authdat->authenticator->cusec;
+ reply.subkey = 0; /* use the one he gave us, so don't
+ need to return one here */
+ reply.seq_number = 0; /* we don't do seq #'s. */
+
+ if (r = krb5_mk_rep(&reply,
+ authdat->authenticator->subkey ?
+ authdat->authenticator->subkey :
+ authdat->ticket->enc_part2->session,
+ &outbuf)) {
+ goto errout;
+ }
+ Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length);
+ }
+ if (krb5_unparse_name(authdat->ticket->enc_part2 ->client,
+ &name))
+ name = 0;
+ Data(ap, KRB_ACCEPT, name, name ? -1 : 0);
+ if (auth_debug_mode) {
+ printf("Kerberos5 identifies him as ``%s''\r\n",
+ name ? name : "");
+ }
+ auth_finished(ap, AUTH_USER);
+
+ free(name);
+ if (authdat->authenticator->subkey &&
+ authdat->authenticator->subkey->keytype == KEYTYPE_DES) {
+ bcopy((Voidptr )authdat->authenticator->subkey->contents,
+ (Voidptr )session_key, sizeof(Block));
+ } else if (authdat->ticket->enc_part2->session->keytype ==
+ KEYTYPE_DES) {
+ bcopy((Voidptr )authdat->ticket->enc_part2->session->contents,
+ (Voidptr )session_key, sizeof(Block));
+ } else
+ break;
+
+#ifdef ENCRYPTION
+ skey.type = SK_DES;
+ skey.length = 8;
+ skey.data = session_key;
+ encrypt_session_key(&skey, 1);
+#endif /* ENCRYPTION */
+ break;
+#ifdef FORWARD
+ case KRB_FORWARD:
+ inbuf.data = (char *)data;
+ inbuf.length = cnt;
+ if (r = rd_and_store_for_creds(&inbuf, authdat->ticket,
+ UserNameRequested)) {
+ char errbuf[128];
+
+ (void) strcpy(errbuf, "Read forwarded creds failed: ");
+ (void) strcat(errbuf, error_message(r));
+ Data(ap, KRB_FORWARD_REJECT, errbuf, -1);
+ if (auth_debug_mode)
+ printf("Could not read forwarded credentials\r\n");
+ }
+ else
+ Data(ap, KRB_FORWARD_ACCEPT, 0, 0);
+ if (auth_debug_mode)
+ printf("Forwarded credentials obtained\r\n");
+ break;
+#endif /* FORWARD */
+ default:
+ if (auth_debug_mode)
+ printf("Unknown Kerberos option %d\r\n", data[-1]);
+ Data(ap, KRB_REJECT, 0, 0);
+ break;
+ }
+}
+
+ void
+kerberos5_reply(ap, data, cnt)
+ Authenticator *ap;
+ unsigned char *data;
+ int cnt;
+{
+ Session_Key skey;
+ 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:
+ if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL &&
+ !mutual_complete) {
+ printf("[ Kerberos V5 accepted you, but didn't provide mutual authentication! ]\n");
+ auth_send_retry();
+ return;
+ }
+ if (cnt)
+ printf("[ Kerberos V5 accepts you as ``%.*s'' ]\n", cnt, data);
+ else
+ printf("[ Kerberos V5 accepts you ]\n");
+ auth_finished(ap, AUTH_USER);
+#ifdef FORWARD
+ if (forward_flags & OPTS_FORWARD_CREDS)
+ kerberos5_forward(ap);
+#endif /* FORWARD */
+ 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 r;
+ krb5_keyblock tmpkey;
+
+ inbuf.length = cnt;
+ inbuf.data = (char *)data;
+
+ tmpkey.keytype = KEYTYPE_DES;
+ tmpkey.contents = session_key;
+ tmpkey.length = sizeof(Block);
+
+ if (r = krb5_rd_rep(&inbuf, &tmpkey, &reply)) {
+ printf("[ Mutual authentication failed: %s ]\n",
+ error_message(r));
+ auth_send_retry();
+ return;
+ }
+ if (reply->ctime != authenticator.ctime ||
+ reply->cusec != authenticator.cusec) {
+ printf("[ Mutual authentication failed (mismatched KRB_AP_REP) ]\n");
+ auth_send_retry();
+ return;
+ }
+ krb5_free_ap_rep_enc_part(reply);
+#ifdef ENCRYPTION
+ skey.type = SK_DES;
+ skey.length = 8;
+ skey.data = session_key;
+ encrypt_session_key(&skey, 0);
+#endif /* ENCRYPTION */
+ mutual_complete = 1;
+ }
+ return;
+#ifdef FORWARD
+ case KRB_FORWARD_ACCEPT:
+ printf("[ Kerberos V5 accepted forwarded credentials ]\n");
+ return;
+ case KRB_FORWARD_REJECT:
+ printf("[ Kerberos V5 refuses forwarded credentials because %.*s ]\r\n",
+ cnt, data);
+ return;
+#endif /* FORWARD */
+ default:
+ if (auth_debug_mode)
+ printf("Unknown Kerberos option %d\r\n", data[-1]);
+ return;
+ }
+}
+
+ int
+kerberos5_status(ap, name, level)
+ Authenticator *ap;
+ char *name;
+ int level;
+{
+ if (level < AUTH_USER)
+ return(level);
+
+ if (UserNameRequested &&
+ krb5_kuserok(authdat->ticket->enc_part2->client, UserNameRequested))
+ {
+ strcpy(name, UserNameRequested);
+ 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(data, cnt, buf, buflen)
+ unsigned char *data, *buf;
+ int cnt, buflen;
+{
+ char lbuf[32];
+ register int i;
+
+ buf[buflen-1] = '\0'; /* make sure its NULL terminated */
+ buflen -= 1;
+
+ switch(data[3]) {
+ case KRB_REJECT: /* Rejected (reason might follow) */
+ strncpy((char *)buf, " REJECT ", buflen);
+ goto common;
+
+ case KRB_ACCEPT: /* Accepted (name might follow) */
+ strncpy((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 */
+ strncpy((char *)buf, " AUTH", buflen);
+ goto common2;
+
+ case KRB_RESPONSE:
+ strncpy((char *)buf, " RESPONSE", buflen);
+ goto common2;
+
+#ifdef FORWARD
+ case KRB_FORWARD: /* Forwarded credentials follow */
+ strncpy((char *)buf, " FORWARD", buflen);
+ goto common2;
+
+ case KRB_FORWARD_ACCEPT: /* Forwarded credentials accepted */
+ strncpy((char *)buf, " FORWARD_ACCEPT", buflen);
+ goto common2;
+
+ case KRB_FORWARD_REJECT: /* Forwarded credentials rejected */
+ /* (reason might follow) */
+ strncpy((char *)buf, " FORWARD_REJECT", buflen);
+ goto common2;
+#endif /* FORWARD */
+
+ default:
+ sprintf(lbuf, " %d (unknown)", data[3]);
+ strncpy((char *)buf, lbuf, buflen);
+ common2:
+ BUMP(buf, buflen);
+ for (i = 4; i < cnt; i++) {
+ sprintf(lbuf, " %d", data[i]);
+ strncpy((char *)buf, lbuf, buflen);
+ BUMP(buf, buflen);
+ }
+ break;
+ }
+}
+
+#ifdef FORWARD
+ void
+kerberos5_forward(ap)
+ Authenticator *ap;
+{
+ struct hostent *hp;
+ krb5_creds *local_creds;
+ krb5_error_code r;
+ krb5_data forw_creds;
+ extern krb5_cksumtype krb5_kdc_req_sumtype;
+ krb5_ccache ccache;
+ int i;
+
+ if (!(local_creds = (krb5_creds *)
+ calloc(1, sizeof(*local_creds)))) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: could not allocate memory for credentials\r\n");
+ return;
+ }
+
+ if (r = krb5_sname_to_principal(RemoteHostName, "host", 1,
+ &local_creds->server)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: could not build server name - %s\r\n",
+ error_message(r));
+ krb5_free_creds(local_creds);
+ return;
+ }
+
+ if (r = krb5_cc_default(&ccache)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: could not get default ccache - %s\r\n",
+ error_message(r));
+ krb5_free_creds(local_creds);
+ return;
+ }
+
+ if (r = krb5_cc_get_principal(ccache, &local_creds->client)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: could not get default principal - %s\r\n",
+ error_message(r));
+ krb5_free_creds(local_creds);
+ return;
+ }
+
+ /* Get ticket from credentials cache */
+ if (r = krb5_get_credentials(KRB5_GC_CACHED, ccache, local_creds)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: could not obtain credentials - %s\r\n",
+ error_message(r));
+ krb5_free_creds(local_creds);
+ return;
+ }
+
+ if (r = get_for_creds(ETYPE_DES_CBC_CRC,
+ krb5_kdc_req_sumtype,
+ RemoteHostName,
+ local_creds->client,
+ &local_creds->keyblock,
+ forward_flags & OPTS_FORWARDABLE_CREDS,
+ &forw_creds)) {
+ if (auth_debug_mode)
+ printf("Kerberos V5: error getting forwarded creds - %s\r\n",
+ error_message(r));
+ krb5_free_creds(local_creds);
+ return;
+ }
+
+ /* Send forwarded credentials */
+ if (!Data(ap, KRB_FORWARD, forw_creds.data, forw_creds.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");
+ }
+
+ krb5_free_creds(local_creds);
+}
+#endif /* FORWARD */
+
+#endif /* KRB5 */
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