589 lines
19 KiB
C
589 lines
19 KiB
C
/*-
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* Copyright (c) 1992, 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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#ifndef lint
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static char sccsid[] = "@(#)spx.c 8.1 (Berkeley) 6/4/93";
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#endif /* not lint */
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#ifdef SPX
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/*
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* COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION
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* ALL RIGHTS RESERVED
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*
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* "Digital Equipment Corporation authorizes the reproduction,
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* distribution and modification of this software subject to the following
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* restrictions:
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*
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* 1. Any partial or whole copy of this software, or any modification
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* thereof, must include this copyright notice in its entirety.
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*
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* 2. This software is supplied "as is" with no warranty of any kind,
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* expressed or implied, for any purpose, including any warranty of fitness
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* or merchantibility. DIGITAL assumes no responsibility for the use or
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* reliability of this software, nor promises to provide any form of
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* support for it on any basis.
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*
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* 3. Distribution of this software is authorized only if no profit or
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* remuneration of any kind is received in exchange for such distribution.
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*
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* 4. This software produces public key authentication certificates
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* bearing an expiration date established by DIGITAL and RSA Data
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* Security, Inc. It may cease to generate certificates after the expiration
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* date. Any modification of this software that changes or defeats
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* the expiration date or its effect is unauthorized.
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*
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* 5. Software that will renew or extend the expiration date of
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* authentication certificates produced by this software may be obtained
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* from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA
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* 94065, (415)595-8782, or from DIGITAL"
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*
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*/
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#include <sys/types.h>
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#include <arpa/telnet.h>
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#include <stdio.h>
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#include "gssapi_defs.h"
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#ifdef __STDC__
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#include <stdlib.h>
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#endif
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#ifdef NO_STRING_H
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#include <strings.h>
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#else
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#include <string.h>
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#endif
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#include <pwd.h>
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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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extern auth_debug_mode;
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static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
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AUTHTYPE_SPX, };
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static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
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TELQUAL_NAME, };
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#define SPX_AUTH 0 /* Authentication data follows */
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#define SPX_REJECT 1 /* Rejected (reason might follow) */
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#define SPX_ACCEPT 2 /* Accepted */
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#ifdef ENCRYPTION
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static Block session_key = { 0 };
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#endif /* ENCRYPTION */
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static Schedule sched;
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static Block challenge = { 0 };
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/*******************************************************************/
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gss_OID_set actual_mechs;
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gss_OID actual_mech_type, output_name_type;
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int major_status, status, msg_ctx = 0, new_status;
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int req_flags = 0, ret_flags, lifetime_rec;
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gss_cred_id_t gss_cred_handle;
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gss_ctx_id_t actual_ctxhandle, context_handle;
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gss_buffer_desc output_token, input_token, input_name_buffer;
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gss_buffer_desc status_string;
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gss_name_t desired_targname, src_name;
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gss_channel_bindings input_chan_bindings;
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char lhostname[GSS_C_MAX_PRINTABLE_NAME];
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char targ_printable[GSS_C_MAX_PRINTABLE_NAME];
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int to_addr=0, from_addr=0;
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char *address;
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gss_buffer_desc fullname_buffer;
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gss_OID fullname_type;
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gss_cred_id_t gss_delegated_cred_handle;
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/*******************************************************************/
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static int
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Data(ap, type, d, c)
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Authenticator *ap;
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int type;
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void *d;
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int c;
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{
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unsigned char *p = str_data + 4;
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unsigned char *cd = (unsigned char *)d;
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if (c == -1)
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c = strlen((char *)cd);
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if (0) {
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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('>', &str_data[2], p - (&str_data[2]));
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return(net_write(str_data, p - str_data));
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}
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int
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spx_init(ap, server)
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Authenticator *ap;
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int server;
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{
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gss_cred_id_t tmp_cred_handle;
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if (server) {
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str_data[3] = TELQUAL_REPLY;
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gethostname(lhostname, sizeof(lhostname));
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strcpy(targ_printable, "SERVICE:rcmd@");
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strcat(targ_printable, lhostname);
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input_name_buffer.length = strlen(targ_printable);
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input_name_buffer.value = targ_printable;
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major_status = gss_import_name(&status,
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&input_name_buffer,
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GSS_C_NULL_OID,
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&desired_targname);
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major_status = gss_acquire_cred(&status,
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desired_targname,
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0,
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GSS_C_NULL_OID_SET,
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GSS_C_ACCEPT,
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&tmp_cred_handle,
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&actual_mechs,
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&lifetime_rec);
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if (major_status != GSS_S_COMPLETE) return(0);
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} else {
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str_data[3] = TELQUAL_IS;
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}
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return(1);
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}
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int
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spx_send(ap)
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Authenticator *ap;
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{
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Block enckey;
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int r;
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gss_OID actual_mech_type, output_name_type;
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int msg_ctx = 0, new_status, status;
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int req_flags = 0, ret_flags, lifetime_rec, major_status;
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gss_buffer_desc output_token, input_token, input_name_buffer;
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gss_buffer_desc output_name_buffer, status_string;
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gss_name_t desired_targname;
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gss_channel_bindings input_chan_bindings;
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char targ_printable[GSS_C_MAX_PRINTABLE_NAME];
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int from_addr=0, to_addr=0, myhostlen, j;
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int deleg_flag=1, mutual_flag=0, replay_flag=0, seq_flag=0;
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char *address;
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printf("[ Trying SPX ... ]\n");
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strcpy(targ_printable, "SERVICE:rcmd@");
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strcat(targ_printable, RemoteHostName);
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input_name_buffer.length = strlen(targ_printable);
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input_name_buffer.value = targ_printable;
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if (!UserNameRequested) {
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return(0);
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}
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major_status = gss_import_name(&status,
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&input_name_buffer,
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GSS_C_NULL_OID,
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&desired_targname);
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major_status = gss_display_name(&status,
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desired_targname,
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&output_name_buffer,
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&output_name_type);
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printf("target is '%s'\n", output_name_buffer.value); fflush(stdout);
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major_status = gss_release_buffer(&status, &output_name_buffer);
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input_chan_bindings = (gss_channel_bindings)
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malloc(sizeof(gss_channel_bindings_desc));
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input_chan_bindings->initiator_addrtype = GSS_C_AF_INET;
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input_chan_bindings->initiator_address.length = 4;
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address = (char *) malloc(4);
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input_chan_bindings->initiator_address.value = (char *) address;
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address[0] = ((from_addr & 0xff000000) >> 24);
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address[1] = ((from_addr & 0xff0000) >> 16);
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address[2] = ((from_addr & 0xff00) >> 8);
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address[3] = (from_addr & 0xff);
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input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET;
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input_chan_bindings->acceptor_address.length = 4;
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address = (char *) malloc(4);
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input_chan_bindings->acceptor_address.value = (char *) address;
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address[0] = ((to_addr & 0xff000000) >> 24);
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address[1] = ((to_addr & 0xff0000) >> 16);
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address[2] = ((to_addr & 0xff00) >> 8);
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address[3] = (to_addr & 0xff);
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input_chan_bindings->application_data.length = 0;
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req_flags = 0;
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if (deleg_flag) req_flags = req_flags | 1;
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if (mutual_flag) req_flags = req_flags | 2;
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if (replay_flag) req_flags = req_flags | 4;
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if (seq_flag) req_flags = req_flags | 8;
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major_status = gss_init_sec_context(&status, /* minor status */
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GSS_C_NO_CREDENTIAL, /* cred handle */
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&actual_ctxhandle, /* ctx handle */
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desired_targname, /* target name */
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GSS_C_NULL_OID, /* mech type */
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req_flags, /* req flags */
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0, /* time req */
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input_chan_bindings, /* chan binding */
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GSS_C_NO_BUFFER, /* input token */
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&actual_mech_type, /* actual mech */
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&output_token, /* output token */
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&ret_flags, /* ret flags */
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&lifetime_rec); /* time rec */
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if ((major_status != GSS_S_COMPLETE) &&
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(major_status != GSS_S_CONTINUE_NEEDED)) {
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gss_display_status(&new_status,
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status,
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GSS_C_MECH_CODE,
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GSS_C_NULL_OID,
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&msg_ctx,
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&status_string);
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printf("%s\n", status_string.value);
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return(0);
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}
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if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) {
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return(0);
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}
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if (!Data(ap, SPX_AUTH, (void *)output_token.value, output_token.length)) {
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return(0);
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}
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return(1);
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}
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void
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spx_is(ap, data, cnt)
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Authenticator *ap;
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unsigned char *data;
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int cnt;
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{
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Session_Key skey;
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Block datablock;
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int r;
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if (cnt-- < 1)
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return;
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switch (*data++) {
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case SPX_AUTH:
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input_token.length = cnt;
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input_token.value = (char *) data;
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gethostname(lhostname, sizeof(lhostname));
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strcpy(targ_printable, "SERVICE:rcmd@");
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strcat(targ_printable, lhostname);
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input_name_buffer.length = strlen(targ_printable);
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input_name_buffer.value = targ_printable;
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major_status = gss_import_name(&status,
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&input_name_buffer,
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GSS_C_NULL_OID,
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&desired_targname);
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major_status = gss_acquire_cred(&status,
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desired_targname,
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0,
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GSS_C_NULL_OID_SET,
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GSS_C_ACCEPT,
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&gss_cred_handle,
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&actual_mechs,
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&lifetime_rec);
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major_status = gss_release_name(&status, desired_targname);
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input_chan_bindings = (gss_channel_bindings)
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malloc(sizeof(gss_channel_bindings_desc));
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input_chan_bindings->initiator_addrtype = GSS_C_AF_INET;
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input_chan_bindings->initiator_address.length = 4;
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address = (char *) malloc(4);
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input_chan_bindings->initiator_address.value = (char *) address;
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address[0] = ((from_addr & 0xff000000) >> 24);
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address[1] = ((from_addr & 0xff0000) >> 16);
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address[2] = ((from_addr & 0xff00) >> 8);
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address[3] = (from_addr & 0xff);
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input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET;
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input_chan_bindings->acceptor_address.length = 4;
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address = (char *) malloc(4);
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input_chan_bindings->acceptor_address.value = (char *) address;
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address[0] = ((to_addr & 0xff000000) >> 24);
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address[1] = ((to_addr & 0xff0000) >> 16);
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address[2] = ((to_addr & 0xff00) >> 8);
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address[3] = (to_addr & 0xff);
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input_chan_bindings->application_data.length = 0;
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major_status = gss_accept_sec_context(&status,
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&context_handle,
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gss_cred_handle,
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&input_token,
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input_chan_bindings,
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&src_name,
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&actual_mech_type,
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&output_token,
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&ret_flags,
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&lifetime_rec,
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&gss_delegated_cred_handle);
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if (major_status != GSS_S_COMPLETE) {
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major_status = gss_display_name(&status,
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src_name,
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&fullname_buffer,
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&fullname_type);
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Data(ap, SPX_REJECT, (void *)"auth failed", -1);
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auth_finished(ap, AUTH_REJECT);
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return;
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}
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major_status = gss_display_name(&status,
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src_name,
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&fullname_buffer,
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&fullname_type);
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Data(ap, SPX_ACCEPT, (void *)output_token.value, output_token.length);
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auth_finished(ap, AUTH_USER);
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break;
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default:
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Data(ap, SPX_REJECT, 0, 0);
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break;
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}
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}
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void
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spx_reply(ap, data, cnt)
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Authenticator *ap;
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unsigned char *data;
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int cnt;
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{
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Session_Key skey;
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if (cnt-- < 1)
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return;
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switch (*data++) {
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case SPX_REJECT:
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if (cnt > 0) {
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printf("[ SPX refuses authentication because %.*s ]\r\n",
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cnt, data);
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} else
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printf("[ SPX refuses authentication ]\r\n");
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auth_send_retry();
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return;
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case SPX_ACCEPT:
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printf("[ SPX accepts you ]\n");
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if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
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/*
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* Send over the encrypted challenge.
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*/
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input_token.value = (char *) data;
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input_token.length = cnt;
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major_status = gss_init_sec_context(&status, /* minor stat */
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GSS_C_NO_CREDENTIAL, /* cred handle */
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&actual_ctxhandle, /* ctx handle */
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desired_targname, /* target name */
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GSS_C_NULL_OID, /* mech type */
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req_flags, /* req flags */
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0, /* time req */
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input_chan_bindings, /* chan binding */
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&input_token, /* input token */
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&actual_mech_type, /* actual mech */
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&output_token, /* output token */
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&ret_flags, /* ret flags */
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&lifetime_rec); /* time rec */
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if (major_status != GSS_S_COMPLETE) {
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gss_display_status(&new_status,
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status,
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GSS_C_MECH_CODE,
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GSS_C_NULL_OID,
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&msg_ctx,
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&status_string);
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printf("[ SPX mutual response fails ... '%s' ]\r\n",
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status_string.value);
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auth_send_retry();
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return;
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}
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}
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auth_finished(ap, AUTH_USER);
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return;
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default:
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return;
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}
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}
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int
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spx_status(ap, name, level)
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Authenticator *ap;
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char *name;
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int level;
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{
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gss_buffer_desc fullname_buffer, acl_file_buffer;
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gss_OID fullname_type;
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char acl_file[160], fullname[160];
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int major_status, status = 0;
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struct passwd *pwd;
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/*
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* hard code fullname to
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* "SPX:/C=US/O=Digital/OU=LKG/OU=Sphinx/OU=Users/CN=Kannan Alagappan"
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* and acl_file to "~kannan/.sphinx"
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*/
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pwd = getpwnam(UserNameRequested);
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if (pwd == NULL) {
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return(AUTH_USER); /* not authenticated */
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}
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strcpy(acl_file, pwd->pw_dir);
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strcat(acl_file, "/.sphinx");
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acl_file_buffer.value = acl_file;
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acl_file_buffer.length = strlen(acl_file);
|
|
|
|
major_status = gss_display_name(&status,
|
|
src_name,
|
|
&fullname_buffer,
|
|
&fullname_type);
|
|
|
|
if (level < AUTH_USER)
|
|
return(level);
|
|
|
|
major_status = gss__check_acl(&status, &fullname_buffer,
|
|
&acl_file_buffer);
|
|
|
|
if (major_status == GSS_S_COMPLETE) {
|
|
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
|
|
spx_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 SPX_REJECT: /* Rejected (reason might follow) */
|
|
strncpy((char *)buf, " REJECT ", buflen);
|
|
goto common;
|
|
|
|
case SPX_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 SPX_AUTH: /* Authentication data follows */
|
|
strncpy((char *)buf, " AUTH", buflen);
|
|
goto common2;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef notdef
|
|
|
|
prkey(msg, key)
|
|
char *msg;
|
|
unsigned char *key;
|
|
{
|
|
register int i;
|
|
printf("%s:", msg);
|
|
for (i = 0; i < 8; i++)
|
|
printf(" %3d", key[i]);
|
|
printf("\r\n");
|
|
}
|
|
#endif
|