/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* auth_des.c, client-side implementation of DES authentication
*/
#include <sys/types.h>
#include <sys/t_lock.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/tiuser.h>
#include <sys/errno.h>
#include <rpc/des_crypt.h>
#include <rpc/types.h>
#include <rpc/auth.h>
#include <rpc/auth_des.h>
#include <rpc/xdr.h>
#include <rpc/clnt.h>
#include <rpc/rpc_msg.h>
#include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */
#include <sys/cmn_err.h>
#include <sys/debug.h>
#define MILLION 1000000
#define RTIME_TIMEOUT 5 /* seconds to wait for sync */
#define AUTH_PRIVATE(auth) (struct ad_private *)auth->ah_private
#define ALLOC(object_type) (object_type *) mem_alloc(sizeof (object_type))
#define FREE(ptr, size) mem_free((char *)(ptr), (int)size)
#define ATTEMPT(xdr_op) if (!(xdr_op))\
return (FALSE)
#define gettimeofday(tvp, tzp) uniqtime(tvp)
static void authdes_nextverf(AUTH *);
static bool_t authdes_marshal(AUTH *, XDR *, struct cred *);
static bool_t authdes_validate(AUTH *, struct opaque_auth *);
static bool_t authdes_refresh(AUTH *, struct rpc_msg *, cred_t *);
static void authdes_destroy(AUTH *);
static bool_t synchronize(struct knetconfig *, struct netbuf *,
int, struct timeval *);
static struct auth_ops *authdes_ops(void);
/*
* This struct is pointed to by the ah_private field of an "AUTH *"
*/
struct ad_private {
char *ad_fullname; /* client's full name */
uint_t ad_fullnamelen; /* length of name, rounded up */
char *ad_servername; /* server's full name */
uint_t ad_servernamelen; /* length of name, rounded up */
uint_t ad_window; /* client specified window */
bool_t ad_dosync; /* synchronize? */
struct netbuf ad_syncaddr; /* remote host to synch with */
struct knetconfig ad_synconfig; /* netconfig for the synch host */
int ad_calltype; /* use rpc or straight call for sync */
struct timeval ad_timediff; /* server's time - client's time */
uint32_t ad_nickname; /* server's nickname for client */
struct authdes_cred ad_cred; /* storage for credential */
struct authdes_verf ad_verf; /* storage for verifier */
struct timeval ad_timestamp; /* timestamp sent */
des_block ad_xkey; /* encrypted conversation key */
};
/*
* Create the client des authentication object
*/
/* ARGSUSED */
int
authdes_create(char *servername, uint_t window, struct netbuf *syncaddr,
struct knetconfig *synconfig, des_block *ckey, int calltype,
AUTH **retauth)
{
AUTH *auth;
struct ad_private *ad;
char namebuf[MAXNETNAMELEN+1];
int error = 0;
enum clnt_stat stat;
if (retauth == NULL)
return (EINVAL);
*retauth = NULL;
/*
* Allocate everything now
*/
auth = ALLOC(AUTH);
ad = ALLOC(struct ad_private);
bzero(ad, sizeof (struct ad_private));
if ((stat = kgetnetname(namebuf)) != 0) {
cmn_err(CE_NOTE,
"authdes_create: unable to get client's netname: %s (error %d)",
clnt_sperrno(stat), stat);
goto failed;
}
ad->ad_fullnamelen = (uint_t)RNDUP(strlen(namebuf));
ad->ad_fullname = mem_alloc(ad->ad_fullnamelen + 1);
ad->ad_servernamelen = (uint_t)strlen(servername);
ad->ad_servername = mem_alloc(ad->ad_servernamelen + 1);
if (auth == NULL || ad == NULL || ad->ad_fullname == NULL ||
ad->ad_servername == NULL) {
cmn_err(CE_NOTE, "authdes_create: out of memory");
error = ENOMEM;
goto failed;
}
/*
* Set up private data
*/
bcopy(namebuf, ad->ad_fullname, ad->ad_fullnamelen + 1);
bcopy(servername, ad->ad_servername, ad->ad_servernamelen + 1);
if (syncaddr != NULL) {
ad->ad_syncaddr = *syncaddr;
ad->ad_synconfig = *synconfig;
ad->ad_dosync = TRUE;
ad->ad_calltype = calltype;
} else {
ad->ad_timediff.tv_sec = 0;
ad->ad_timediff.tv_usec = 0;
ad->ad_dosync = FALSE;
}
ad->ad_window = window;
if (ckey == NULL) {
if ((stat = key_gendes(&auth->ah_key)) != RPC_SUCCESS) {
cmn_err(CE_NOTE,
"authdes_create: unable to gen conversation key: %s (error %d)",
clnt_sperrno(stat), stat);
if (stat == RPC_INTR)
error = EINTR;
else if (stat == RPC_TIMEDOUT)
error = ETIMEDOUT;
else
error = EINVAL; /* XXX */
goto failed;
}
} else
auth->ah_key = *ckey;
/*
* Set up auth handle
*/
auth->ah_cred.oa_flavor = AUTH_DES;
auth->ah_verf.oa_flavor = AUTH_DES;
auth->ah_ops = authdes_ops();
auth->ah_private = (caddr_t)ad;
if (!authdes_refresh(auth, NULL, CRED()))
goto failed;
*retauth = auth;
return (0);
failed:
if (ad != NULL && ad->ad_fullname != NULL)
FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
if (ad != NULL && ad->ad_servername != NULL)
FREE(ad->ad_servername, ad->ad_servernamelen + 1);
if (ad != NULL)
FREE(ad, sizeof (struct ad_private));
if (auth != NULL)
FREE(auth, sizeof (AUTH));
return ((error == 0) ? EINVAL : error); /* XXX */
}
/*
* Implement the five authentication operations
*/
/*
* 1. Next Verifier
*/
/* ARGSUSED */
static void
authdes_nextverf(AUTH *auth)
{
/* what the heck am I supposed to do??? */
}
/*
* 2. Marshal
*/
/* ARGSUSED */
static bool_t
authdes_marshal(AUTH *auth, XDR *xdrs, struct cred *cr)
{
/* LINTED pointer alignment */
struct ad_private *ad = AUTH_PRIVATE(auth);
struct authdes_cred *cred = &ad->ad_cred;
struct authdes_verf *verf = &ad->ad_verf;
des_block cryptbuf[2];
des_block ivec;
int status;
int len;
int32_t *ixdr;
/*
* Figure out the "time", accounting for any time difference
* with the server if necessary.
*/
(void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL);
ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
if (ad->ad_timestamp.tv_usec >= MILLION) {
ad->ad_timestamp.tv_usec -= MILLION;
ad->ad_timestamp.tv_sec += 1;
}
/*
* XDR the timestamp and possibly some other things, then
* encrypt them.
*/
ixdr = (int32_t *)cryptbuf;
IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_sec);
IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_usec);
if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
IXDR_PUT_U_INT32(ixdr, ad->ad_window);
IXDR_PUT_U_INT32(ixdr, ad->ad_window - 1);
ivec.key.high = ivec.key.low = 0;
status = cbc_crypt((char *)&auth->ah_key, (char *)cryptbuf,
2 * sizeof (des_block), DES_ENCRYPT, (char *)&ivec);
} else {
status = ecb_crypt((char *)&auth->ah_key, (char *)cryptbuf,
sizeof (des_block), DES_ENCRYPT);
}
if (DES_FAILED(status)) {
cmn_err(CE_NOTE, "authdes_marshal: DES encryption failure");
return (FALSE);
}
ad->ad_verf.adv_xtimestamp = cryptbuf[0];
if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
} else {
ad->ad_cred.adc_nickname = ad->ad_nickname;
ad->ad_verf.adv_winverf = 0;
}
/*
* Serialize the credential and verifier into opaque
* authentication data.
*/
if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
len = ((1 + 1 + 2 + 1) * BYTES_PER_XDR_UNIT +
ad->ad_fullnamelen);
} else
len = (1 + 1) * BYTES_PER_XDR_UNIT;
if (ixdr = xdr_inline(xdrs, 2 * BYTES_PER_XDR_UNIT)) {
IXDR_PUT_INT32(ixdr, AUTH_DES);
IXDR_PUT_INT32(ixdr, len);
} else {
ATTEMPT(xdr_putint32(xdrs,
(int32_t *)&auth->ah_cred.oa_flavor));
ATTEMPT(xdr_putint32(xdrs, (int32_t *)&len));
}
ATTEMPT(xdr_authdes_cred(xdrs, cred));
len = (2 + 1) * BYTES_PER_XDR_UNIT;
if (ixdr = xdr_inline(xdrs, 2 * BYTES_PER_XDR_UNIT)) {
IXDR_PUT_INT32(ixdr, AUTH_DES);
IXDR_PUT_INT32(ixdr, len);
} else {
ATTEMPT(xdr_putint32(xdrs,
(int32_t *)&auth->ah_verf.oa_flavor));
ATTEMPT(xdr_putint32(xdrs, (int32_t *)&len));
}
ATTEMPT(xdr_authdes_verf(xdrs, verf));
return (TRUE);
}
/*
* 3. Validate
*/
static bool_t
authdes_validate(AUTH *auth, struct opaque_auth *rverf)
{
/* LINTED pointer alignment */
struct ad_private *ad = AUTH_PRIVATE(auth);
struct authdes_verf verf;
int status;
uint32_t *ixdr;
des_block buf;
if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT)
return (FALSE);
/* LINTED pointer alignment */
ixdr = (uint32_t *)rverf->oa_base;
buf.key.high = (uint32_t)*ixdr++;
buf.key.low = (uint32_t)*ixdr++;
verf.adv_int_u = IXDR_GET_U_INT32(ixdr);
/*
* Decrypt the timestamp
*/
status = ecb_crypt((char *)&auth->ah_key, (char *)&buf,
sizeof (des_block), DES_DECRYPT);
if (DES_FAILED(status)) {
cmn_err(CE_NOTE, "authdes_validate: DES decryption failure");
return (FALSE);
}
/*
* xdr the decrypted timestamp
*/
/* LINTED pointer alignment */
ixdr = (uint32_t *)buf.c;
verf.adv_timestamp.tv_sec = IXDR_GET_INT32(ixdr) + 1;
verf.adv_timestamp.tv_usec = IXDR_GET_INT32(ixdr);
/*
* validate
*/
if (bcmp((char *)&ad->ad_timestamp, (char *)&verf.adv_timestamp,
sizeof (struct timeval)) != 0) {
cmn_err(CE_NOTE, "authdes_validate: verifier mismatch");
return (FALSE);
}
/*
* We have a nickname now, let's use it
*/
ad->ad_nickname = verf.adv_nickname;
ad->ad_cred.adc_namekind = ADN_NICKNAME;
return (TRUE);
}
/*
* 4. Refresh
*
* msg is a dummy argument here.
*/
/* ARGSUSED */
static bool_t
authdes_refresh(AUTH *auth, struct rpc_msg *msg, cred_t *cr)
{
/* LINTED pointer alignment */
struct ad_private *ad = AUTH_PRIVATE(auth);
struct authdes_cred *cred = &ad->ad_cred;
enum clnt_stat stat;
if (ad->ad_dosync &&
!synchronize(&ad->ad_synconfig, &ad->ad_syncaddr,
ad->ad_calltype, &ad->ad_timediff)) {
/*
* Hope the clocks are synced!
*/
timerclear(&ad->ad_timediff);
cmn_err(CE_NOTE,
"authdes_refresh: unable to synchronize with server %s", ad->ad_servername);
}
ad->ad_xkey = auth->ah_key;
if ((stat = key_encryptsession(ad->ad_servername, &ad->ad_xkey, cr)) !=
RPC_SUCCESS) {
cmn_err(CE_NOTE,
"authdes_refresh: unable to encrypt conversation key for user (uid %d): "
"%s (error %d)",
(int)crgetuid(cr), clnt_sperrno(stat), stat);
return (FALSE);
}
cred->adc_fullname.key = ad->ad_xkey;
cred->adc_namekind = ADN_FULLNAME;
cred->adc_fullname.name = ad->ad_fullname;
return (TRUE);
}
/*
* 5. Destroy
*/
static void
authdes_destroy(AUTH *auth)
{
/* LINTED pointer alignment */
struct ad_private *ad = AUTH_PRIVATE(auth);
FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
FREE(ad->ad_servername, ad->ad_servernamelen + 1);
FREE(ad, sizeof (struct ad_private));
FREE(auth, sizeof (AUTH));
}
/*
* Synchronize with the server at the given address, that is,
* adjust timep to reflect the delta between our clocks
*/
static bool_t
synchronize(struct knetconfig *synconfig, struct netbuf *syncaddr, int calltype,
struct timeval *timep)
{
struct timeval mytime;
struct timeval timout;
timout.tv_sec = RTIME_TIMEOUT;
timout.tv_usec = 0;
if (rtime(synconfig, syncaddr, calltype, timep, &timout) < 0)
return (FALSE);
(void) gettimeofday(&mytime, (struct timezone *)NULL);
timep->tv_sec -= mytime.tv_sec;
if (mytime.tv_usec > timep->tv_usec) {
timep->tv_sec -= 1;
timep->tv_usec += MILLION;
}
timep->tv_usec -= mytime.tv_usec;
return (TRUE);
}
static struct auth_ops *
authdes_ops(void)
{
static struct auth_ops ops;
mutex_enter(&authdes_ops_lock);
if (ops.ah_nextverf == NULL) {
ops.ah_nextverf = authdes_nextverf;
ops.ah_marshal = authdes_marshal;
ops.ah_validate = authdes_validate;
ops.ah_refresh = authdes_refresh;
ops.ah_destroy = authdes_destroy;
ops.ah_wrap = authany_wrap;
ops.ah_unwrap = authany_unwrap;
}
mutex_exit(&authdes_ops_lock);
return (&ops);
}