summaryrefslogtreecommitdiff
path: root/appl/telnet/libtelnet/kerberos.c
diff options
context:
space:
mode:
Diffstat (limited to 'appl/telnet/libtelnet/kerberos.c')
-rw-r--r--appl/telnet/libtelnet/kerberos.c723
1 files changed, 723 insertions, 0 deletions
diff --git a/appl/telnet/libtelnet/kerberos.c b/appl/telnet/libtelnet/kerberos.c
new file mode 100644
index 0000000000000..1c86fe298514d
--- /dev/null
+++ b/appl/telnet/libtelnet/kerberos.c
@@ -0,0 +1,723 @@
+/*-
+ * 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.
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to 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 HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+RCSID("$Id: kerberos.c 22071 2007-11-14 20:04:50Z lha $");
+
+#ifdef KRB4
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_ARPA_TELNET_H
+#include <arpa/telnet.h>
+#endif
+#include <stdio.h>
+#include <krb.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <roken.h>
+#ifdef SOCKS
+#include <socks.h>
+#endif
+
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+int kerberos4_cksum (unsigned char *, int);
+extern int auth_debug_mode;
+
+static unsigned char str_data[2048] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+ AUTHTYPE_KERBEROS_V4, };
+
+#define KRB_AUTH 0 /* Authentication data follows */
+#define KRB_REJECT 1 /* Rejected (reason might follow) */
+#define KRB_ACCEPT 2 /* Accepted */
+#define KRB_CHALLENGE 3 /* Challenge for mutual auth. */
+#define KRB_RESPONSE 4 /* Response for mutual auth. */
+
+#define KRB_FORWARD 5 /* */
+#define KRB_FORWARD_ACCEPT 6 /* */
+#define KRB_FORWARD_REJECT 7 /* */
+
+#define KRB_SERVICE_NAME "rcmd"
+
+static KTEXT_ST auth;
+static char name[ANAME_SZ];
+static AUTH_DAT adat;
+static des_cblock session_key;
+static des_cblock cred_session;
+static des_key_schedule sched;
+static des_cblock challenge;
+static int auth_done; /* XXX */
+
+static int pack_cred(CREDENTIALS *cred, unsigned char *buf);
+static int unpack_cred(unsigned char *buf, int len, CREDENTIALS *cred);
+
+
+static int
+Data(Authenticator *ap, int type, const void *d, int c)
+{
+ unsigned char *p = str_data + 4;
+ const unsigned char *cd = (const unsigned char *)d;
+
+ if (c == -1)
+ c = strlen((const 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(telnet_net_write(str_data, p - str_data));
+}
+
+int
+kerberos4_init(Authenticator *ap, int server)
+{
+ FILE *fp;
+
+ if (server) {
+ str_data[3] = TELQUAL_REPLY;
+ if ((fp = fopen(KEYFILE, "r")) == NULL)
+ return(0);
+ fclose(fp);
+ } else {
+ str_data[3] = TELQUAL_IS;
+ }
+ return(1);
+}
+
+char dst_realm_buf[REALM_SZ], *dest_realm = NULL;
+int dst_realm_sz = REALM_SZ;
+
+static int
+kerberos4_send(char *name, Authenticator *ap)
+{
+ KTEXT_ST auth;
+ char instance[INST_SZ];
+ char *realm;
+ CREDENTIALS cred;
+ int r;
+
+ if (!UserNameRequested) {
+ if (auth_debug_mode) {
+ printf("Kerberos V4: no user name supplied\r\n");
+ }
+ return(0);
+ }
+
+ memset(instance, 0, sizeof(instance));
+
+ strlcpy (instance,
+ krb_get_phost(RemoteHostName),
+ INST_SZ);
+
+ realm = dest_realm ? dest_realm : krb_realmofhost(RemoteHostName);
+
+ if (!realm) {
+ printf("Kerberos V4: no realm for %s\r\n", RemoteHostName);
+ return(0);
+ }
+ printf("[ Trying %s (%s.%s@%s) ... ]\r\n", name,
+ KRB_SERVICE_NAME, instance, realm);
+ r = krb_mk_req(&auth, KRB_SERVICE_NAME, instance, realm, 0L);
+ if (r) {
+ printf("mk_req failed: %s\r\n", krb_get_err_text(r));
+ return(0);
+ }
+ r = krb_get_cred(KRB_SERVICE_NAME, instance, realm, &cred);
+ if (r) {
+ printf("get_cred failed: %s\r\n", krb_get_err_text(r));
+ return(0);
+ }
+ if (!auth_sendname((unsigned char*)UserNameRequested,
+ strlen(UserNameRequested))) {
+ if (auth_debug_mode)
+ printf("Not enough room for user name\r\n");
+ return(0);
+ }
+ if (auth_debug_mode)
+ printf("Sent %d bytes of authentication data\r\n", auth.length);
+ if (!Data(ap, KRB_AUTH, (void *)auth.dat, auth.length)) {
+ if (auth_debug_mode)
+ printf("Not enough room for authentication data\r\n");
+ return(0);
+ }
+#ifdef ENCRYPTION
+ /* create challenge */
+ if ((ap->way & AUTH_HOW_MASK)==AUTH_HOW_MUTUAL) {
+ int i;
+
+ des_key_sched(&cred.session, sched);
+ memcpy (&cred_session, &cred.session, sizeof(cred_session));
+#ifndef HAVE_OPENSSL
+ des_init_random_number_generator(&cred.session);
+#endif
+ des_new_random_key(&session_key);
+ des_ecb_encrypt(&session_key, &session_key, sched, 0);
+ des_ecb_encrypt(&session_key, &challenge, sched, 0);
+
+ /*
+ old code
+ Some CERT Advisory thinks this is a bad thing...
+
+ des_init_random_number_generator(&cred.session);
+ des_new_random_key(&challenge);
+ des_ecb_encrypt(&challenge, &session_key, sched, 1);
+ */
+
+ /*
+ * Increment the challenge by 1, and encrypt it for
+ * later comparison.
+ */
+ for (i = 7; i >= 0; --i)
+ if(++challenge[i] != 0) /* No carry! */
+ break;
+ des_ecb_encrypt(&challenge, &challenge, sched, 1);
+ }
+
+#endif
+
+ if (auth_debug_mode) {
+ printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length));
+ printd(auth.dat, auth.length);
+ printf("\r\n");
+ printf("Sent Kerberos V4 credentials to server\r\n");
+ }
+ return(1);
+}
+int
+kerberos4_send_mutual(Authenticator *ap)
+{
+ return kerberos4_send("mutual KERBEROS4", ap);
+}
+
+int
+kerberos4_send_oneway(Authenticator *ap)
+{
+ return kerberos4_send("KERBEROS4", ap);
+}
+
+void
+kerberos4_is(Authenticator *ap, unsigned char *data, int cnt)
+{
+ struct sockaddr_in addr;
+ char realm[REALM_SZ];
+ char instance[INST_SZ];
+ int r;
+ socklen_t addr_len;
+
+ if (cnt-- < 1)
+ return;
+ switch (*data++) {
+ case KRB_AUTH:
+ if (krb_get_lrealm(realm, 1) != KSUCCESS) {
+ Data(ap, KRB_REJECT, (void *)"No local V4 Realm.", -1);
+ auth_finished(ap, AUTH_REJECT);
+ if (auth_debug_mode)
+ printf("No local realm\r\n");
+ return;
+ }
+ memmove(auth.dat, data, auth.length = cnt);
+ if (auth_debug_mode) {
+ printf("Got %d bytes of authentication data\r\n", cnt);
+ printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length));
+ printd(auth.dat, auth.length);
+ printf("\r\n");
+ }
+ k_getsockinst(0, instance, sizeof(instance));
+ addr_len = sizeof(addr);
+ if(getpeername(0, (struct sockaddr *)&addr, &addr_len) < 0) {
+ if(auth_debug_mode)
+ printf("getpeername failed\r\n");
+ Data(ap, KRB_REJECT, "getpeername failed", -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+ if (addr.sin_family != AF_INET) {
+ if (auth_debug_mode)
+ printf("unknown address family: %d\r\n", addr.sin_family);
+ Data(ap, KRB_REJECT, "bad address family", -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+
+ r = krb_rd_req(&auth, KRB_SERVICE_NAME,
+ instance, addr.sin_addr.s_addr, &adat, "");
+ if (r) {
+ if (auth_debug_mode)
+ printf("Kerberos failed him as %s\r\n", name);
+ Data(ap, KRB_REJECT, (void *)krb_get_err_text(r), -1);
+ auth_finished(ap, AUTH_REJECT);
+ return;
+ }
+ /* save the session key */
+ memmove(session_key, adat.session, sizeof(adat.session));
+ krb_kntoln(&adat, name);
+
+ if (UserNameRequested && !kuserok(&adat, UserNameRequested)){
+ char ts[MaxPathLen];
+ struct passwd *pw = getpwnam(UserNameRequested);
+
+ if(pw){
+ snprintf(ts, sizeof(ts),
+ "%s%u",
+ TKT_ROOT,
+ (unsigned)pw->pw_uid);
+ esetenv("KRBTKFILE", ts, 1);
+
+ if (pw->pw_uid == 0)
+ syslog(LOG_INFO|LOG_AUTH,
+ "ROOT Kerberos login from %s on %s\n",
+ krb_unparse_name_long(adat.pname,
+ adat.pinst,
+ adat.prealm),
+ RemoteHostName);
+ }
+ Data(ap, KRB_ACCEPT, NULL, 0);
+ } else {
+ char *msg;
+ int ret;
+
+ ret = asprintf (&msg, "user `%s' is not authorized to "
+ "login as `%s'",
+ krb_unparse_name_long(adat.pname,
+ adat.pinst,
+ adat.prealm),
+ UserNameRequested ? UserNameRequested : "<nobody>");
+ if (ret == -1)
+ Data(ap, KRB_REJECT, NULL, 0);
+ else {
+ Data(ap, KRB_REJECT, (void *)msg, -1);
+ free(msg);
+ }
+ auth_finished(ap, AUTH_REJECT);
+ break;
+ }
+ auth_finished(ap, AUTH_USER);
+ break;
+
+ case KRB_CHALLENGE:
+#ifndef ENCRYPTION
+ Data(ap, KRB_RESPONSE, NULL, 0);
+#else
+ if(!VALIDKEY(session_key)){
+ Data(ap, KRB_RESPONSE, NULL, 0);
+ break;
+ }
+ des_key_sched(&session_key, sched);
+ {
+ des_cblock d_block;
+ int i;
+ Session_Key skey;
+
+ memmove(d_block, data, sizeof(d_block));
+
+ /* make a session key for encryption */
+ des_ecb_encrypt(&d_block, &session_key, sched, 1);
+ skey.type=SK_DES;
+ skey.length=8;
+ skey.data=session_key;
+ encrypt_session_key(&skey, 1);
+
+ /* decrypt challenge, add one and encrypt it */
+ des_ecb_encrypt(&d_block, &challenge, sched, 0);
+ for (i = 7; i >= 0; i--)
+ if(++challenge[i] != 0)
+ break;
+ des_ecb_encrypt(&challenge, &challenge, sched, 1);
+ Data(ap, KRB_RESPONSE, (void *)challenge, sizeof(challenge));
+ }
+#endif
+ break;
+
+ case KRB_FORWARD:
+ {
+ des_key_schedule ks;
+ unsigned char netcred[sizeof(CREDENTIALS)];
+ CREDENTIALS cred;
+ int ret;
+ if(cnt > sizeof(cred))
+ abort();
+
+ memcpy (session_key, adat.session, sizeof(session_key));
+ des_set_key(&session_key, ks);
+ des_pcbc_encrypt((void*)data, (void*)netcred, cnt,
+ ks, &session_key, DES_DECRYPT);
+ unpack_cred(netcred, cnt, &cred);
+ {
+ if(strcmp(cred.service, KRB_TICKET_GRANTING_TICKET) ||
+ strncmp(cred.instance, cred.realm, sizeof(cred.instance)) ||
+ cred.lifetime < 0 || cred.lifetime > 255 ||
+ cred.kvno < 0 || cred.kvno > 255 ||
+ cred.issue_date < 0 ||
+ cred.issue_date > time(0) + CLOCK_SKEW ||
+ strncmp(cred.pname, adat.pname, sizeof(cred.pname)) ||
+ strncmp(cred.pinst, adat.pinst, sizeof(cred.pinst))){
+ Data(ap, KRB_FORWARD_REJECT, "Bad credentials", -1);
+ }else{
+ if((ret = tf_setup(&cred,
+ cred.pname,
+ cred.pinst)) == KSUCCESS){
+ struct passwd *pw = getpwnam(UserNameRequested);
+
+ if (pw)
+ chown(tkt_string(), pw->pw_uid, pw->pw_gid);
+ Data(ap, KRB_FORWARD_ACCEPT, 0, 0);
+ } else{
+ Data(ap, KRB_FORWARD_REJECT,
+ krb_get_err_text(ret), -1);
+ }
+ }
+ }
+ memset(data, 0, cnt);
+ memset(&ks, 0, sizeof(ks));
+ memset(&cred, 0, sizeof(cred));
+ }
+
+ break;
+
+ default:
+ if (auth_debug_mode)
+ printf("Unknown Kerberos option %d\r\n", data[-1]);
+ Data(ap, KRB_REJECT, 0, 0);
+ break;
+ }
+}
+
+void
+kerberos4_reply(Authenticator *ap, unsigned char *data, int cnt)
+{
+ Session_Key skey;
+
+ if (cnt-- < 1)
+ return;
+ switch (*data++) {
+ case KRB_REJECT:
+ if(auth_done){ /* XXX Ick! */
+ printf("[ Kerberos V4 received unknown opcode ]\r\n");
+ }else{
+ printf("[ Kerberos V4 refuses authentication ");
+ if (cnt > 0)
+ printf("because %.*s ", cnt, data);
+ printf("]\r\n");
+ auth_send_retry();
+ }
+ return;
+ case KRB_ACCEPT:
+ printf("[ Kerberos V4 accepts you ]\r\n");
+ auth_done = 1;
+ if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+ /*
+ * Send over the encrypted challenge.
+ */
+ Data(ap, KRB_CHALLENGE, session_key,
+ sizeof(session_key));
+ des_ecb_encrypt(&session_key, &session_key, sched, 1);
+ skey.type = SK_DES;
+ skey.length = 8;
+ skey.data = session_key;
+ encrypt_session_key(&skey, 0);
+#if 0
+ kerberos4_forward(ap, &cred_session);
+#endif
+ return;
+ }
+ auth_finished(ap, AUTH_USER);
+ return;
+ case KRB_RESPONSE:
+ /* make sure the response is correct */
+ if ((cnt != sizeof(des_cblock)) ||
+ (memcmp(data, challenge, sizeof(challenge)))){
+ printf("[ Kerberos V4 challenge failed!!! ]\r\n");
+ auth_send_retry();
+ return;
+ }
+ printf("[ Kerberos V4 challenge successful ]\r\n");
+ auth_finished(ap, AUTH_USER);
+ break;
+ case KRB_FORWARD_ACCEPT:
+ printf("[ Kerberos V4 accepted forwarded credentials ]\r\n");
+ break;
+ case KRB_FORWARD_REJECT:
+ printf("[ Kerberos V4 rejected forwarded credentials: `%.*s']\r\n",
+ cnt, data);
+ break;
+ default:
+ if (auth_debug_mode)
+ printf("Unknown Kerberos option %d\r\n", data[-1]);
+ return;
+ }
+}
+
+int
+kerberos4_status(Authenticator *ap, char *name, size_t name_sz, int level)
+{
+ if (level < AUTH_USER)
+ return(level);
+
+ if (UserNameRequested && !kuserok(&adat, UserNameRequested)) {
+ strlcpy(name, UserNameRequested, name_sz);
+ 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
+kerberos4_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
+{
+ int i;
+
+ buf[buflen-1] = '\0'; /* make sure it's 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_CHALLENGE:
+ strlcpy((char *)buf, " CHALLENGE", buflen);
+ goto common2;
+
+ case KRB_RESPONSE:
+ strlcpy((char *)buf, " RESPONSE", 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;
+ }
+}
+
+int
+kerberos4_cksum(unsigned char *d, int n)
+{
+ int ck = 0;
+
+ /*
+ * A comment is probably needed here for those not
+ * well versed in the "C" language. Yes, this is
+ * supposed to be a "switch" with the body of the
+ * "switch" being a "while" statement. The whole
+ * purpose of the switch is to allow us to jump into
+ * the middle of the while() loop, and then not have
+ * to do any more switch()s.
+ *
+ * Some compilers will spit out a warning message
+ * about the loop not being entered at the top.
+ */
+ switch (n&03)
+ while (n > 0) {
+ case 0:
+ ck ^= (int)*d++ << 24;
+ --n;
+ case 3:
+ ck ^= (int)*d++ << 16;
+ --n;
+ case 2:
+ ck ^= (int)*d++ << 8;
+ --n;
+ case 1:
+ ck ^= (int)*d++;
+ --n;
+ }
+ return(ck);
+}
+
+static int
+pack_cred(CREDENTIALS *cred, unsigned char *buf)
+{
+ unsigned char *p = buf;
+
+ memcpy (p, cred->service, ANAME_SZ);
+ p += ANAME_SZ;
+ memcpy (p, cred->instance, INST_SZ);
+ p += INST_SZ;
+ memcpy (p, cred->realm, REALM_SZ);
+ p += REALM_SZ;
+ memcpy(p, cred->session, 8);
+ p += 8;
+ p += KRB_PUT_INT(cred->lifetime, p, 4, 4);
+ p += KRB_PUT_INT(cred->kvno, p, 4, 4);
+ p += KRB_PUT_INT(cred->ticket_st.length, p, 4, 4);
+ memcpy(p, cred->ticket_st.dat, cred->ticket_st.length);
+ p += cred->ticket_st.length;
+ p += KRB_PUT_INT(0, p, 4, 4);
+ p += KRB_PUT_INT(cred->issue_date, p, 4, 4);
+ memcpy (p, cred->pname, ANAME_SZ);
+ p += ANAME_SZ;
+ memcpy (p, cred->pinst, INST_SZ);
+ p += INST_SZ;
+ return p - buf;
+}
+
+static int
+unpack_cred(unsigned char *buf, int len, CREDENTIALS *cred)
+{
+ char *p = (char*)buf;
+ uint32_t tmp;
+
+ strncpy (cred->service, p, ANAME_SZ);
+ cred->service[ANAME_SZ - 1] = '\0';
+ p += ANAME_SZ;
+ strncpy (cred->instance, p, INST_SZ);
+ cred->instance[INST_SZ - 1] = '\0';
+ p += INST_SZ;
+ strncpy (cred->realm, p, REALM_SZ);
+ cred->realm[REALM_SZ - 1] = '\0';
+ p += REALM_SZ;
+
+ memcpy(cred->session, p, 8);
+ p += 8;
+ p += krb_get_int(p, &tmp, 4, 0);
+ cred->lifetime = tmp;
+ p += krb_get_int(p, &tmp, 4, 0);
+ cred->kvno = tmp;
+
+ p += krb_get_int(p, &cred->ticket_st.length, 4, 0);
+ memcpy(cred->ticket_st.dat, p, cred->ticket_st.length);
+ p += cred->ticket_st.length;
+ p += krb_get_int(p, &tmp, 4, 0);
+ cred->ticket_st.mbz = 0;
+ p += krb_get_int(p, (uint32_t *)&cred->issue_date, 4, 0);
+
+ strncpy (cred->pname, p, ANAME_SZ);
+ cred->pname[ANAME_SZ - 1] = '\0';
+ p += ANAME_SZ;
+ strncpy (cred->pinst, p, INST_SZ);
+ cred->pinst[INST_SZ - 1] = '\0';
+ p += INST_SZ;
+ return 0;
+}
+
+
+int
+kerberos4_forward(Authenticator *ap, void *v)
+{
+ des_cblock *key = (des_cblock *)v;
+ CREDENTIALS cred;
+ char *realm;
+ des_key_schedule ks;
+ int len;
+ unsigned char netcred[sizeof(CREDENTIALS)];
+ int ret;
+
+ realm = krb_realmofhost(RemoteHostName);
+ if(realm == NULL)
+ return -1;
+ memset(&cred, 0, sizeof(cred));
+ ret = krb_get_cred(KRB_TICKET_GRANTING_TICKET,
+ realm,
+ realm,
+ &cred);
+ if(ret)
+ return ret;
+ des_set_key(key, ks);
+ len = pack_cred(&cred, netcred);
+ des_pcbc_encrypt((void*)netcred, (void*)netcred, len,
+ ks, key, DES_ENCRYPT);
+ memset(&ks, 0, sizeof(ks));
+ Data(ap, KRB_FORWARD, netcred, len);
+ memset(netcred, 0, sizeof(netcred));
+ return 0;
+}
+
+#endif /* KRB4 */
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-02 18:33:34 +0000