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-rw-r--r--crypto/kerberosIV/appl/telnet/libtelnet/kerberos5.c734
1 files changed, 0 insertions, 734 deletions
diff --git a/crypto/kerberosIV/appl/telnet/libtelnet/kerberos5.c b/crypto/kerberosIV/appl/telnet/libtelnet/kerberos5.c
deleted file mode 100644
index 3e6abbb..0000000
--- a/crypto/kerberosIV/appl/telnet/libtelnet/kerberos5.c
+++ /dev/null
@@ -1,734 +0,0 @@
-/*-
- * 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 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.
- */
-
-#include <config.h>
-
-RCSID("$Id: kerberos5.c,v 1.38 1999/09/16 20:41:33 assar Exp $");
-
-#ifdef KRB5
-
-#include <arpa/telnet.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <ctype.h>
-#include <pwd.h>
-#define Authenticator k5_Authenticator
-#include <krb5.h>
-#undef Authenticator
-#include <roken.h>
-#ifdef SOCKS
-#include <socks.h>
-#endif
-
-
-#include "encrypt.h"
-#include "auth.h"
-#include "misc.h"
-
-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 (Authenticator *);
-
-static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
- AUTHTYPE_KERBEROS_V5, };
-
-#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. */
-
-#define KRB_FORWARD 4 /* Forwarded credentials follow */
-#define KRB_FORWARD_ACCEPT 5 /* Forwarded credentials accepted */
-#define KRB_FORWARD_REJECT 6 /* Forwarded credentials rejected */
-
-static krb5_data auth;
-static krb5_ticket *ticket;
-
-static krb5_context context;
-static krb5_auth_context auth_context;
-
-static int
-Data(Authenticator *ap, int type, void *d, int c)
-{
- unsigned char *p = str_data + 4;
- unsigned char *cd = (unsigned char *)d;
-
- if (c == -1)
- c = strlen(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
-kerberos5_init(Authenticator *ap, int server)
-{
- if (server)
- str_data[3] = TELQUAL_REPLY;
- else
- str_data[3] = TELQUAL_IS;
- krb5_init_context(&context);
- return(1);
-}
-
-static int
-kerberos5_send(char *name, Authenticator *ap)
-{
- krb5_error_code ret;
- krb5_ccache ccache;
- int ap_opts;
- krb5_data cksum_data;
- char foo[2];
- extern int net;
-
- printf("[ Trying %s ... ]\r\n", name);
- if (!UserNameRequested) {
- if (auth_debug_mode) {
- printf("Kerberos V5: no user name supplied\r\n");
- }
- return(0);
- }
-
- ret = krb5_cc_default(context, &ccache);
- if (ret) {
- if (auth_debug_mode) {
- printf("Kerberos V5: could not get default ccache: %s\r\n",
- krb5_get_err_text (context, ret));
- }
- return 0;
- }
-
- if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL)
- ap_opts = AP_OPTS_MUTUAL_REQUIRED;
- else
- ap_opts = 0;
-
- ret = krb5_auth_con_init (context, &auth_context);
- if (ret) {
- if (auth_debug_mode) {
- printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- }
- return(0);
- }
-
- ret = krb5_auth_con_setaddrs_from_fd (context,
- auth_context,
- &net);
- if (ret) {
- if (auth_debug_mode) {
- printf ("Kerberos V5:"
- " krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- }
- return(0);
- }
-
- krb5_auth_setkeytype (context, auth_context, KEYTYPE_DES);
-
- foo[0] = ap->type;
- foo[1] = ap->way;
-
- cksum_data.length = sizeof(foo);
- cksum_data.data = foo;
- ret = krb5_mk_req(context, &auth_context, ap_opts,
- "host", RemoteHostName,
- &cksum_data, ccache, &auth);
-
- if (ret) {
- if (1 || auth_debug_mode) {
- printf("Kerberos V5: mk_req failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- }
- 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 (!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);
-}
-
-int
-kerberos5_send_mutual(Authenticator *ap)
-{
- return kerberos5_send("mutual KERBEROS5", ap);
-}
-
-int
-kerberos5_send_oneway(Authenticator *ap)
-{
- return kerberos5_send("KERBEROS5", ap);
-}
-
-void
-kerberos5_is(Authenticator *ap, unsigned char *data, int cnt)
-{
- krb5_error_code ret;
- krb5_data outbuf;
- krb5_keyblock *key_block;
- char *name;
- krb5_principal server;
- int zero = 0;
-
- if (cnt-- < 1)
- return;
- switch (*data++) {
- case KRB_AUTH:
- auth.data = (char *)data;
- auth.length = cnt;
-
- auth_context = NULL;
-
- ret = krb5_auth_con_init (context, &auth_context);
- if (ret) {
- Data(ap, KRB_REJECT, "krb5_auth_con_init failed", -1);
- auth_finished(ap, AUTH_REJECT);
- if (auth_debug_mode)
- printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- return;
- }
-
- ret = krb5_auth_con_setaddrs_from_fd (context,
- auth_context,
- &zero);
- if (ret) {
- Data(ap, KRB_REJECT, "krb5_auth_con_setaddrs_from_fd failed", -1);
- auth_finished(ap, AUTH_REJECT);
- if (auth_debug_mode)
- printf("Kerberos V5: "
- "krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- return;
- }
-
- ret = krb5_sock_to_principal (context,
- 0,
- "host",
- KRB5_NT_SRV_HST,
- &server);
- if (ret) {
- Data(ap, KRB_REJECT, "krb5_sock_to_principal failed", -1);
- auth_finished(ap, AUTH_REJECT);
- if (auth_debug_mode)
- printf("Kerberos V5: "
- "krb5_sock_to_principal failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- return;
- }
-
- ret = krb5_rd_req(context,
- &auth_context,
- &auth,
- server,
- NULL,
- NULL,
- &ticket);
- krb5_free_principal (context, server);
-
- if (ret) {
- char *errbuf;
-
- asprintf(&errbuf,
- "Read req failed: %s",
- krb5_get_err_text(context, ret));
- Data(ap, KRB_REJECT, errbuf, -1);
- if (auth_debug_mode)
- printf("%s\r\n", errbuf);
- free (errbuf);
- return;
- }
-
- {
- char foo[2];
-
- foo[0] = ap->type;
- foo[1] = ap->way;
-
- ret = krb5_verify_authenticator_checksum(context,
- auth_context,
- foo,
- sizeof(foo));
-
- if (ret) {
- char *errbuf;
- asprintf(&errbuf, "Bad checksum: %s",
- krb5_get_err_text(context, ret));
- Data(ap, KRB_REJECT, errbuf, -1);
- if (auth_debug_mode)
- printf ("%s\r\n", errbuf);
- free(errbuf);
- return;
- }
- }
- ret = krb5_auth_con_getremotesubkey (context,
- auth_context,
- &key_block);
-
- if (ret) {
- Data(ap, KRB_REJECT, "krb5_auth_con_getremotesubkey failed", -1);
- auth_finished(ap, AUTH_REJECT);
- if (auth_debug_mode)
- printf("Kerberos V5: "
- "krb5_auth_con_getremotesubkey failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- return;
- }
-
- if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
- ret = krb5_mk_rep(context, &auth_context, &outbuf);
- if (ret) {
- Data(ap, KRB_REJECT,
- "krb5_mk_rep failed", -1);
- auth_finished(ap, AUTH_REJECT);
- if (auth_debug_mode)
- printf("Kerberos V5: "
- "krb5_mk_rep failed (%s)\r\n",
- krb5_get_err_text(context, ret));
- return;
- }
- Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length);
- }
- if (krb5_unparse_name(context, ticket->client, &name))
- name = 0;
-
- if(UserNameRequested && krb5_kuserok(context,
- ticket->client,
- UserNameRequested)) {
- Data(ap, KRB_ACCEPT, name, name ? -1 : 0);
- if (auth_debug_mode) {
- printf("Kerberos5 identifies him as ``%s''\r\n",
- name ? name : "");
- }
-
- if(key_block->keytype == ETYPE_DES_CBC_MD5 ||
- key_block->keytype == ETYPE_DES_CBC_MD4 ||
- key_block->keytype == ETYPE_DES_CBC_CRC) {
- Session_Key skey;
-
- skey.type = SK_DES;
- skey.length = 8;
- skey.data = key_block->keyvalue.data;
- encrypt_session_key(&skey, 0);
- }
-
- } else {
- char *msg;
-
- asprintf (&msg, "user `%s' is not authorized to "
- "login as `%s'",
- name ? name : "<unknown>",
- UserNameRequested ? UserNameRequested : "<nobody>");
- if (msg == NULL)
- Data(ap, KRB_REJECT, NULL, 0);
- else {
- Data(ap, KRB_REJECT, (void *)msg, -1);
- free(msg);
- }
- }
- 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;
- }
-
- ret = krb5_rd_cred (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);
- 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);
- 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(buf, buflen, " %d (unknown)", data[3]);
- common2:
- BUMP(buf, buflen);
- for (i = 4; i < cnt; i++) {
- snprintf(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 gettting 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");
- }
-}
-
-#endif /* KRB5 */
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