spx.c

早期freebsd实现

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)spx.c	8.1 (Berkeley) 6/4/93";
#endif /* not lint */

#ifdef	SPX
/*
 * COPYRIGHT (C) 1990 DIGITAL EQUIPMENT CORPORATION
 * ALL RIGHTS RESERVED
 *
 * "Digital Equipment Corporation authorizes the reproduction,
 * distribution and modification of this software subject to the following
 * restrictions:
 *
 * 1.  Any partial or whole copy of this software, or any modification
 * thereof, must include this copyright notice in its entirety.
 *
 * 2.  This software is supplied "as is" with no warranty of any kind,
 * expressed or implied, for any purpose, including any warranty of fitness
 * or merchantibility.  DIGITAL assumes no responsibility for the use or
 * reliability of this software, nor promises to provide any form of
 * support for it on any basis.
 *
 * 3.  Distribution of this software is authorized only if no profit or
 * remuneration of any kind is received in exchange for such distribution.
 *
 * 4.  This software produces public key authentication certificates
 * bearing an expiration date established by DIGITAL and RSA Data
 * Security, Inc.  It may cease to generate certificates after the expiration
 * date.  Any modification of this software that changes or defeats
 * the expiration date or its effect is unauthorized.
 *
 * 5.  Software that will renew or extend the expiration date of
 * authentication certificates produced by this software may be obtained
 * from RSA Data Security, Inc., 10 Twin Dolphin Drive, Redwood City, CA
 * 94065, [phone], or from DIGITAL"
 *
 */

#include <sys/types.h>
#include <arpa/telnet.h>
#include <stdio.h>
#include "gssapi_defs.h"
#ifdef	__STDC__
#include <stdlib.h>
#endif
#ifdef	NO_STRING_H
#include <strings.h>
#else
#include <string.h>
#endif

#include <pwd.h>
#include "encrypt.h"
#include "auth.h"
#include "misc.h"

extern auth_debug_mode;

static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
			  		AUTHTYPE_SPX, };
static unsigned char str_name[1024] = { IAC, SB, TELOPT_AUTHENTICATION,
					TELQUAL_NAME, };

#define	SPX_AUTH	0		/* Authentication data follows */
#define	SPX_REJECT	1		/* Rejected (reason might follow) */
#define SPX_ACCEPT	2		/* Accepted */

#ifdef	ENCRYPTION
static Block	session_key	= { 0 };
#endif	/* ENCRYPTION */
static Schedule sched;
static Block	challenge	= { 0 };


/*******************************************************************/

gss_OID_set           actual_mechs;
gss_OID               actual_mech_type, output_name_type;
int                   major_status, status, msg_ctx = 0, new_status;
int                   req_flags = 0, ret_flags, lifetime_rec;
gss_cred_id_t         gss_cred_handle;
gss_ctx_id_t          actual_ctxhandle, context_handle;
gss_buffer_desc       output_token, input_token, input_name_buffer;
gss_buffer_desc       status_string;
gss_name_t            desired_targname, src_name;
gss_channel_bindings  input_chan_bindings;
char                  lhostname[GSS_C_MAX_PRINTABLE_NAME];
char                  targ_printable[GSS_C_MAX_PRINTABLE_NAME];
int                   to_addr=0, from_addr=0;
char                  *address;
gss_buffer_desc       fullname_buffer;
gss_OID               fullname_type;
gss_cred_id_t         gss_delegated_cred_handle;

/*******************************************************************/



	static int
Data(ap, type, d, c)
	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((char *)cd);

        if (0) {
                printf("%s:%d: [%d] (%d)",
                        str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
                        str_data[3],
                        type, c);
                printd(d, c);
                printf("\r\n");
        }
	*p++ = ap->type;
	*p++ = ap->way;
	*p++ = type;
        while (c-- > 0) {
                if ((*p++ = *cd++) == IAC)
                        *p++ = IAC;
        }
        *p++ = IAC;
        *p++ = SE;
	if (str_data[3] == TELQUAL_IS)
		printsub('>', &str_data[2], p - (&str_data[2]));
        return(net_write(str_data, p - str_data));
}

	int
spx_init(ap, server)
	Authenticator *ap;
	int server;
{
        gss_cred_id_t    tmp_cred_handle;

	if (server) {
		str_data[3] = TELQUAL_REPLY;
		gethostname(lhostname, sizeof(lhostname));
		strcpy(targ_printable, "SERVICE:rcmd@");
		strcat(targ_printable, lhostname);
		input_name_buffer.length = strlen(targ_printable);
		input_name_buffer.value = targ_printable;
		major_status = gss_import_name(&status,
                                       &input_name_buffer,
                                       GSS_C_NULL_OID,
                                       &desired_targname);
		major_status = gss_acquire_cred(&status,
                                        desired_targname,
                                        0,
                                        GSS_C_NULL_OID_SET,
                                        GSS_C_ACCEPT,
                                        &tmp_cred_handle,
                                        &actual_mechs,
                                        &lifetime_rec);
		if (major_status != GSS_S_COMPLETE) return(0);
	} else {
		str_data[3] = TELQUAL_IS;
	}
	return(1);
}

	int
spx_send(ap)
	Authenticator *ap;
{
	Block enckey;
	int r;

	gss_OID  actual_mech_type, output_name_type;
	int           msg_ctx = 0, new_status, status;
	int           req_flags = 0, ret_flags, lifetime_rec, major_status;
	gss_buffer_desc  output_token, input_token, input_name_buffer;
	gss_buffer_desc  output_name_buffer, status_string;
	gss_name_t    desired_targname;
	gss_channel_bindings  input_chan_bindings;
	char targ_printable[GSS_C_MAX_PRINTABLE_NAME];
	int  from_addr=0, to_addr=0, myhostlen, j;
	int  deleg_flag=1, mutual_flag=0, replay_flag=0, seq_flag=0;
	char *address;

	printf("[ Trying SPX ... ]\n");
	strcpy(targ_printable, "SERVICE:rcmd@");
	strcat(targ_printable, RemoteHostName);

	input_name_buffer.length = strlen(targ_printable);
	input_name_buffer.value = targ_printable;

	if (!UserNameRequested) {
		return(0);
	}

	major_status = gss_import_name(&status,
				       &input_name_buffer,
				       GSS_C_NULL_OID,
				       &desired_targname);


	major_status = gss_display_name(&status,
					desired_targname,
					&output_name_buffer,
					&output_name_type);

	printf("target is '%s'\n", output_name_buffer.value); fflush(stdout);

	major_status = gss_release_buffer(&status, &output_name_buffer);

	input_chan_bindings = (gss_channel_bindings)
	  malloc(sizeof(gss_channel_bindings_desc));

	input_chan_bindings->initiator_addrtype = GSS_C_AF_INET;
	input_chan_bindings->initiator_address.length = 4;
	address = (char *) malloc(4);
	input_chan_bindings->initiator_address.value = (char *) address;
	address[0] = ((from_addr & 0xff000000) >> 24);
	address[1] = ((from_addr & 0xff0000) >> 16);
	address[2] = ((from_addr & 0xff00) >> 8);
	address[3] = (from_addr & 0xff);
	input_chan_bindings->acceptor_addrtype = GSS_C_AF_INET;
	input_chan_bindings->acceptor_address.length = 4;
	address = (char *) malloc(4);
	input_chan_bindings->acceptor_address.value = (char *) address;
	address[0] = ((to_addr & 0xff000000) >> 24);
	address[1] = ((to_addr & 0xff0000) >> 16);
	address[2] = ((to_addr & 0xff00) >> 8);
	address[3] = (to_addr & 0xff);
	input_chan_bindings->application_data.length = 0;

        req_flags = 0;
        if (deleg_flag)  req_flags = req_flags | 1;
        if (mutual_flag) req_flags = req_flags | 2;
        if (replay_flag) req_flags = req_flags | 4;
        if (seq_flag)    req_flags = req_flags | 8;

        major_status = gss_init_sec_context(&status,         /* minor status */
					GSS_C_NO_CREDENTIAL, /* cred handle */
                                        &actual_ctxhandle,   /* ctx handle */
                                        desired_targname,    /* target name */
                                        GSS_C_NULL_OID,      /* mech type */
                                        req_flags,           /* req flags */
                                        0,                   /* time req */
                                        input_chan_bindings, /* chan binding */
                                        GSS_C_NO_BUFFER,     /* input token */
                                        &actual_mech_type,   /* actual mech */
                                        &output_token,       /* output token */
                                        &ret_flags,          /* ret flags */
                                        &lifetime_rec);      /* time rec */

	if ((major_status != GSS_S_COMPLETE) &&
	    (major_status != GSS_S_CONTINUE_NEEDED)) {
          gss_display_status(&new_status,
                             status,
                             GSS_C_MECH_CODE,
                             GSS_C_NULL_OID,
                             &msg_ctx,
                             &status_string);
          printf("%s\n", status_string.value);
	  return(0);