diff options
Diffstat (limited to 'crypto/telnet/libtelnet/auth.c')
-rw-r--r-- | crypto/telnet/libtelnet/auth.c | 623 |
1 files changed, 0 insertions, 623 deletions
diff --git a/crypto/telnet/libtelnet/auth.c b/crypto/telnet/libtelnet/auth.c deleted file mode 100644 index 4642655..0000000 --- a/crypto/telnet/libtelnet/auth.c +++ /dev/null @@ -1,623 +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. - * - */ - -#if 0 -#ifndef lint -static const char sccsid[] = "@(#)auth.c 8.3 (Berkeley) 5/30/95"; -#endif /* not lint */ -#endif -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - - -/* - * 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 AUTHENTICATION -#define AUTH_NAMES -#include <sys/types.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <arpa/telnet.h> - -#include "encrypt.h" -#include "auth.h" -#include "misc-proto.h" -#include "auth-proto.h" - -#define typemask(x) ((x) > 0 ? 1 << ((x)-1) : 0) - -#ifdef KRB4_ENCPWD -extern krb4encpwd_init(); -extern krb4encpwd_send(); -extern krb4encpwd_is(); -extern krb4encpwd_reply(); -extern krb4encpwd_status(); -extern krb4encpwd_printsub(); -#endif - -#ifdef RSA_ENCPWD -extern rsaencpwd_init(); -extern rsaencpwd_send(); -extern rsaencpwd_is(); -extern rsaencpwd_reply(); -extern rsaencpwd_status(); -extern rsaencpwd_printsub(); -#endif - -int auth_debug_mode = 0; -static const char *Name = "Noname"; -static int Server = 0; -static Authenticator *authenticated = 0; -static int authenticating = 0; -static int validuser = 0; -static unsigned char _auth_send_data[256]; -static unsigned char *auth_send_data; -static int auth_send_cnt = 0; - -int auth_onoff(char *type, int on); -void auth_encrypt_user(char *name); - -/* - * Authentication types supported. Plese note that these are stored - * in priority order, i.e. try the first one first. - */ -Authenticator authenticators[] = { -#ifdef KRB5 -# ifdef ENCRYPTION - { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, - kerberos5_init, - kerberos5_send_mutual, - kerberos5_is, - kerberos5_reply, - kerberos5_status, - kerberos5_printsub }, -# endif /* ENCRYPTION */ - { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, - kerberos5_init, - kerberos5_send_oneway, - kerberos5_is, - kerberos5_reply, - kerberos5_status, - kerberos5_printsub }, -#endif -#ifdef KRB4 -# ifdef ENCRYPTION - { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, - kerberos4_init, - kerberos4_send, - kerberos4_is, - kerberos4_reply, - kerberos4_status, - kerberos4_printsub }, -# endif /* ENCRYPTION */ - { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, - kerberos4_init, - kerberos4_send, - kerberos4_is, - kerberos4_reply, - kerberos4_status, - kerberos4_printsub }, -#endif -#ifdef KRB4_ENCPWD - { AUTHTYPE_KRB4_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL, - krb4encpwd_init, - krb4encpwd_send, - krb4encpwd_is, - krb4encpwd_reply, - krb4encpwd_status, - krb4encpwd_printsub }, -#endif -#ifdef RSA_ENCPWD - { AUTHTYPE_RSA_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, - rsaencpwd_init, - rsaencpwd_send, - rsaencpwd_is, - rsaencpwd_reply, - rsaencpwd_status, - rsaencpwd_printsub }, -#endif -#ifdef SRA - { AUTHTYPE_SRA, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY, - sra_init, - sra_send, - sra_is, - sra_reply, - sra_status, - sra_printsub }, - -#endif - { 0, 0, 0, 0, 0, 0, 0, 0 }, -}; - -static Authenticator NoAuth = { 0, 0, 0, 0, 0, 0, 0, 0 }; - -static int i_support = 0; -static int i_wont_support = 0; - -Authenticator * -findauthenticator(int type, int way) -{ - Authenticator *ap = authenticators; - - while (ap->type && (ap->type != type || ap->way != way)) - ++ap; - return(ap->type ? ap : 0); -} - -void -auth_init(const char *name, int server) -{ - Authenticator *ap = authenticators; - - Server = server; - Name = name; - - i_support = 0; - authenticated = 0; - authenticating = 0; - while (ap->type) { - if (!ap->init || (*ap->init)(ap, server)) { - i_support |= typemask(ap->type); - if (auth_debug_mode) - printf(">>>%s: I support auth type %d %d\r\n", - Name, - ap->type, ap->way); - } - else if (auth_debug_mode) - printf(">>>%s: Init failed: auth type %d %d\r\n", - Name, ap->type, ap->way); - ++ap; - } -} - -void -auth_disable_name(char *name) -{ - int x; - for (x = 0; x < AUTHTYPE_CNT; ++x) { - if (AUTHTYPE_NAME(x) && !strcasecmp(name, AUTHTYPE_NAME(x))) { - i_wont_support |= typemask(x); - break; - } - } -} - -int -getauthmask(char *type, int *maskp) -{ - int x; - - if (AUTHTYPE_NAME(0) && !strcasecmp(type, AUTHTYPE_NAME(0))) { - *maskp = -1; - return(1); - } - - for (x = 1; x < AUTHTYPE_CNT; ++x) { - if (AUTHTYPE_NAME(x) && !strcasecmp(type, AUTHTYPE_NAME(x))) { - *maskp = typemask(x); - return(1); - } - } - return(0); -} - -int -auth_enable(char *type) -{ - return(auth_onoff(type, 1)); -} - -int -auth_disable(char *type) -{ - return(auth_onoff(type, 0)); -} - -int -auth_onoff(char *type, int on) -{ - int i, mask = -1; - Authenticator *ap; - - if (!strcasecmp(type, "?") || !strcasecmp(type, "help")) { - printf("auth %s 'type'\n", on ? "enable" : "disable"); - printf("Where 'type' is one of:\n"); - printf("\t%s\n", AUTHTYPE_NAME(0)); - mask = 0; - for (ap = authenticators; ap->type; ap++) { - if ((mask & (i = typemask(ap->type))) != 0) - continue; - mask |= i; - printf("\t%s\n", AUTHTYPE_NAME(ap->type)); - } - return(0); - } - - if (!getauthmask(type, &mask)) { - printf("%s: invalid authentication type\n", type); - return(0); - } - if (on) - i_wont_support &= ~mask; - else - i_wont_support |= mask; - return(1); -} - -int -auth_togdebug(int on) -{ - if (on < 0) - auth_debug_mode ^= 1; - else - auth_debug_mode = on; - printf("auth debugging %s\n", auth_debug_mode ? "enabled" : "disabled"); - return(1); -} - -int -auth_status(void) -{ - Authenticator *ap; - int i, mask; - - if (i_wont_support == -1) - printf("Authentication disabled\n"); - else - printf("Authentication enabled\n"); - - mask = 0; - for (ap = authenticators; ap->type; ap++) { - if ((mask & (i = typemask(ap->type))) != 0) - continue; - mask |= i; - printf("%s: %s\n", AUTHTYPE_NAME(ap->type), - (i_wont_support & typemask(ap->type)) ? - "disabled" : "enabled"); - } - return(1); -} - -/* - * This routine is called by the server to start authentication - * negotiation. - */ -void -auth_request(void) -{ - static unsigned char str_request[64] = { IAC, SB, - TELOPT_AUTHENTICATION, - TELQUAL_SEND, }; - Authenticator *ap = authenticators; - unsigned char *e = str_request + 4; - - if (!authenticating) { - authenticating = 1; - while (ap->type) { - if (i_support & ~i_wont_support & typemask(ap->type)) { - if (auth_debug_mode) { - printf(">>>%s: Sending type %d %d\r\n", - Name, ap->type, ap->way); - } - *e++ = ap->type; - *e++ = ap->way; - } - ++ap; - } - *e++ = IAC; - *e++ = SE; - net_write(str_request, e - str_request); - printsub('>', &str_request[2], e - str_request - 2); - } -} - -/* - * This is called when an AUTH SEND is received. - * It should never arrive on the server side (as only the server can - * send an AUTH SEND). - * You should probably respond to it if you can... - * - * If you want to respond to the types out of order (i.e. even - * if he sends LOGIN KERBEROS and you support both, you respond - * with KERBEROS instead of LOGIN (which is against what the - * protocol says)) you will have to hack this code... - */ -void -auth_send(unsigned char *data, int cnt) -{ - Authenticator *ap; - static unsigned char str_none[] = { IAC, SB, TELOPT_AUTHENTICATION, - TELQUAL_IS, AUTHTYPE_NULL, 0, - IAC, SE }; - if (Server) { - if (auth_debug_mode) { - printf(">>>%s: auth_send called!\r\n", Name); - } - return; - } - - if (auth_debug_mode) { - printf(">>>%s: auth_send got:", Name); - printd(data, cnt); printf("\r\n"); - } - - /* - * Save the data, if it is new, so that we can continue looking - * at it if the authorization we try doesn't work - */ - if (data < _auth_send_data || - data > _auth_send_data + sizeof(_auth_send_data)) { - auth_send_cnt = (size_t)cnt > sizeof(_auth_send_data) - ? sizeof(_auth_send_data) - : cnt; - memmove((void *)_auth_send_data, (void *)data, auth_send_cnt); - auth_send_data = _auth_send_data; - } else { - /* - * This is probably a no-op, but we just make sure - */ - auth_send_data = data; - auth_send_cnt = cnt; - } - while ((auth_send_cnt -= 2) >= 0) { - if (auth_debug_mode) - printf(">>>%s: He supports %d\r\n", - Name, *auth_send_data); - if ((i_support & ~i_wont_support) & typemask(*auth_send_data)) { - ap = findauthenticator(auth_send_data[0], - auth_send_data[1]); - if (ap && ap->send) { - if (auth_debug_mode) - printf(">>>%s: Trying %d %d\r\n", - Name, auth_send_data[0], - auth_send_data[1]); - if ((*ap->send)(ap)) { - /* - * Okay, we found one we like - * and did it. - * we can go home now. - */ - if (auth_debug_mode) - printf(">>>%s: Using type %d\r\n", - Name, *auth_send_data); - auth_send_data += 2; - return; - } - } - /* else - * just continue on and look for the - * next one if we didn't do anything. - */ - } - auth_send_data += 2; - } - net_write(str_none, sizeof(str_none)); - printsub('>', &str_none[2], sizeof(str_none) - 2); - if (auth_debug_mode) - printf(">>>%s: Sent failure message\r\n", Name); - auth_finished(0, AUTH_REJECT); -} - -void -auth_send_retry(void) -{ - /* - * if auth_send_cnt <= 0 then auth_send will end up rejecting - * the authentication and informing the other side of this. - */ - auth_send(auth_send_data, auth_send_cnt); -} - -void -auth_is(unsigned char *data, int cnt) -{ - Authenticator *ap; - - if (cnt < 2) - return; - - if (data[0] == AUTHTYPE_NULL) { - auth_finished(0, AUTH_REJECT); - return; - } - - if ((ap = findauthenticator(data[0], data[1]))) { - if (ap->is) - (*ap->is)(ap, data+2, cnt-2); - } else if (auth_debug_mode) - printf(">>>%s: Invalid authentication in IS: %d\r\n", - Name, *data); -} - -void -auth_reply(unsigned char *data, int cnt) -{ - Authenticator *ap; - - if (cnt < 2) - return; - - if ((ap = findauthenticator(data[0], data[1]))) { - if (ap->reply) - (*ap->reply)(ap, data+2, cnt-2); - } else if (auth_debug_mode) - printf(">>>%s: Invalid authentication in SEND: %d\r\n", - Name, *data); -} - -void -auth_name(unsigned char *data, int cnt) -{ - unsigned char savename[256]; - - if (cnt < 1) { - if (auth_debug_mode) - printf(">>>%s: Empty name in NAME\r\n", Name); - return; - } - if ((size_t)cnt > sizeof(savename) - 1) { - if (auth_debug_mode) - printf(">>>%s: Name in NAME (%d) exceeds %d length\r\n", - Name, cnt, (u_int)sizeof(savename)-1); - return; - } - memmove((void *)savename, (void *)data, cnt); - savename[cnt] = '\0'; /* Null terminate */ - if (auth_debug_mode) - printf(">>>%s: Got NAME [%s]\r\n", Name, savename); - auth_encrypt_user(savename); -} - -int -auth_sendname(unsigned char *cp, int len) -{ - static unsigned char str_request[256+6] - = { IAC, SB, TELOPT_AUTHENTICATION, TELQUAL_NAME, }; - unsigned char *e = str_request + 4; - unsigned char *ee = &str_request[sizeof(str_request)-2]; - - while (--len >= 0) { - if ((*e++ = *cp++) == IAC) - *e++ = IAC; - if (e >= ee) - return(0); - } - *e++ = IAC; - *e++ = SE; - net_write(str_request, e - str_request); - printsub('>', &str_request[2], e - &str_request[2]); - return(1); -} - -void -auth_finished(Authenticator *ap, int result) -{ - if (!(authenticated = ap)) - authenticated = &NoAuth; - validuser = result; -} - -/* ARGSUSED */ -static void -auth_intr(int sig __unused) -{ - auth_finished(0, AUTH_REJECT); -} - -int -auth_wait(char *name) -{ - if (auth_debug_mode) - printf(">>>%s: in auth_wait.\r\n", Name); - - if (Server && !authenticating) - return(0); - - (void) signal(SIGALRM, auth_intr); - alarm(30); - while (!authenticated) - if (telnet_spin()) - break; - alarm(0); - (void) signal(SIGALRM, SIG_DFL); - - /* - * Now check to see if the user is valid or not - */ - if (!authenticated || authenticated == &NoAuth) - return(AUTH_REJECT); - - if (validuser == AUTH_VALID) - validuser = AUTH_USER; - - if (authenticated->status) - validuser = (*authenticated->status)(authenticated, - name, validuser); - return(validuser); -} - -void -auth_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen) -{ - Authenticator *ap; - - if ((ap = findauthenticator(data[1], data[2])) && ap->printsub) - (*ap->printsub)(data, cnt, buf, buflen); - else - auth_gen_printsub(data, cnt, buf, buflen); -} - -void -auth_gen_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen) -{ - unsigned char *cp; - unsigned char tbuf[16]; - - cnt -= 3; - data += 3; - buf[buflen-1] = '\0'; - buf[buflen-2] = '*'; - buflen -= 2; - for (; cnt > 0; cnt--, data++) { - sprintf((char *)tbuf, " %d", *data); - for (cp = tbuf; *cp && buflen > 0; --buflen) - *buf++ = *cp++; - if (buflen <= 0) - return; - } - *buf = '\0'; -} -#endif |