reactos/dll/win32/libtirpc/src/auth_des.c

   1 /*
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 /*
  29  * Copyright (c) 1988 by Sun Microsystems, Inc.
  30  */
  31 /*
  32  * auth_des.c, client-side implementation of DES authentication
  33  */
  34
  35 #include <wintirpc.h>
  36 //#include <pthread.h>
  37 #include <reentrant.h>
  38 //#include <err.h>
  39 #include <errno.h>
  40 #include <string.h>
  41 #include <stdlib.h>
  42 //#include <unistd.h>
  43 //#include <sys/cdefs.h>
  44 #include <rpc/des_crypt.h>
  45 //#include <syslog.h>
  46 #include <rpc/types.h>
  47 #include <rpc/auth.h>
  48 #include <rpc/auth_des.h>
  49 #include <rpc/clnt.h>
  50 #include <rpc/xdr.h>
  51 //#include <sys/socket.h>
  52 #undef NIS
  53 #include <rpcsvc/nis.h>
  54
  55 #if defined(LIBC_SCCS) && !defined(lint)
  56 #endif
  57 //#include <sys/cdefs.h>
  58
  59 #define USEC_PER_SEC            1000000
  60 #define RTIME_TIMEOUT           5       /* seconds to wait for sync */
  61
  62 #define AUTH_PRIVATE(auth)      (struct ad_private *) auth->ah_private
  63 #define ALLOC(object_type)      (object_type *) mem_alloc(sizeof(object_type))
  64 #define FREE(ptr, size)         mem_free((char *)(ptr), (int) size)
  65 #define ATTEMPT(xdr_op)         if (!(xdr_op)) return (FALSE)
  66
  67 extern bool_t xdr_authdes_cred( XDR *, struct authdes_cred *);
  68 extern bool_t xdr_authdes_verf( XDR *, struct authdes_verf *);
  69 extern int key_encryptsession_pk();
  70
  71 extern bool_t __rpc_get_time_offset(struct timeval *, nis_server *, char *,
  72         char **, char **);
  73
  74 /*
  75  * DES authenticator operations vector
  76  */
  77 static void     authdes_nextverf(AUTH *);
  78 static bool_t   authdes_marshal(AUTH *, XDR *);
  79 static bool_t   authdes_validate(AUTH *, struct opaque_auth *);
  80 static bool_t   authdes_refresh(AUTH *, void *);
  81 static void     authdes_destroy(AUTH *);
  82
  83 static struct auth_ops *authdes_ops(void);
  84
  85 /*
  86  * This struct is pointed to by the ah_private field of an "AUTH *"
  87  */
  88 struct ad_private {
  89         char *ad_fullname;              /* client's full name */
  90         u_int ad_fullnamelen;           /* length of name, rounded up */
  91         char *ad_servername;            /* server's full name */
  92         u_int ad_servernamelen;         /* length of name, rounded up */
  93         u_int ad_window;                /* client specified window */
  94         bool_t ad_dosync;               /* synchronize? */
  95         struct netbuf ad_syncaddr;      /* remote host to synch with */
  96         char *ad_timehost;              /* remote host to synch with */
  97         struct timeval ad_timediff;     /* server's time - client's time */
  98         u_int ad_nickname;              /* server's nickname for client */
  99         struct authdes_cred ad_cred;    /* storage for credential */
 100         struct authdes_verf ad_verf;    /* storage for verifier */
 101         struct timeval ad_timestamp;    /* timestamp sent */
 102         des_block ad_xkey;              /* encrypted conversation key */
 103         u_char ad_pkey[1024];           /* Server's actual public key */
 104         char *ad_netid;                 /* Timehost netid */
 105         char *ad_uaddr;                 /* Timehost uaddr */
 106         nis_server *ad_nis_srvr;        /* NIS+ server struct */
 107 };
 108
 109 AUTH *authdes_pk_seccreate(const char *, netobj *, u_int, const char *,
 110         const des_block *, nis_server *);
 111
 112 /*
 113  * documented version of authdes_seccreate
 114  */
 115 /*
 116         servername:     network name of server
 117         win:            time to live
 118         timehost:       optional hostname to sync with
 119         ckey:           optional conversation key to use
 120 */
 121
 122 AUTH *
 123 authdes_seccreate(const char *servername, const u_int win,
 124         const char *timehost, const des_block *ckey)
 125 {
 126         u_char  pkey_data[1024];
 127         netobj  pkey;
 128         AUTH    *dummy;
 129
 130         if (! getpublickey(servername, (char *) pkey_data)) {
 131                 //syslog(LOG_ERR,
 132                 //    "authdes_seccreate: no public key found for %s",
 133                 //    servername);
 134                 return (NULL);
 135         }
 136
 137         pkey.n_bytes = (char *) pkey_data;
 138         pkey.n_len = (u_int)strlen((char *)pkey_data) + 1;
 139         dummy = authdes_pk_seccreate(servername, &pkey, win, timehost,
 140             ckey, NULL);
 141         return (dummy);
 142 }
 143
 144 /*
 145  * Slightly modified version of authdessec_create which takes the public key
 146  * of the server principal as an argument. This spares us a call to
 147  * getpublickey() which in the nameserver context can cause a deadlock.
 148  */
 149 AUTH *
 150 authdes_pk_seccreate(const char *servername, netobj *pkey, u_int window,
 151         const char *timehost, const des_block *ckey, nis_server *srvr)
 152 {
 153         AUTH *auth;
 154         struct ad_private *ad;
 155         char namebuf[MAXNETNAMELEN+1];
 156
 157         /*
 158          * Allocate everything now
 159          */
 160         auth = ALLOC(AUTH);
 161         if (auth == NULL) {
 162                 //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
 163                 return (NULL);
 164         }
 165         ad = ALLOC(struct ad_private);
 166         if (ad == NULL) {
 167                 //syslog(LOG_ERR, "authdes_pk_seccreate: out of memory");
 168                 goto failed;
 169         }
 170         ad->ad_fullname = ad->ad_servername = NULL; /* Sanity reasons */
 171         ad->ad_timehost = NULL;
 172         ad->ad_netid = NULL;
 173         ad->ad_uaddr = NULL;
 174         ad->ad_nis_srvr = NULL;
 175         ad->ad_timediff.tv_sec = 0;
 176         ad->ad_timediff.tv_usec = 0;
 177         memcpy(ad->ad_pkey, pkey->n_bytes, pkey->n_len);
 178         if (!getnetname(namebuf))
 179                 goto failed;
 180         ad->ad_fullnamelen = RNDUP((u_int) strlen(namebuf));
 181         ad->ad_fullname = (char *)mem_alloc(ad->ad_fullnamelen + 1);
 182         ad->ad_servernamelen = strlen(servername);
 183         ad->ad_servername = (char *)mem_alloc(ad->ad_servernamelen + 1);
 184
 185         if (ad->ad_fullname == NULL || ad->ad_servername == NULL) {
 186                 //syslog(LOG_ERR, "authdes_seccreate: out of memory");
 187                 goto failed;
 188         }
 189         if (timehost != NULL) {
 190                 ad->ad_timehost = (char *)mem_alloc(strlen(timehost) + 1);
 191                 if (ad->ad_timehost == NULL) {
 192                         //syslog(LOG_ERR, "authdes_seccreate: out of memory");
 193                         goto failed;
 194                 }
 195                 memcpy(ad->ad_timehost, timehost, strlen(timehost) + 1);
 196                 ad->ad_dosync = TRUE;
 197         } else if (srvr != NULL) {
 198                 ad->ad_nis_srvr = srvr; /* transient */
 199                 ad->ad_dosync = TRUE;
 200         } else {
 201                 ad->ad_dosync = FALSE;
 202         }
 203         memcpy(ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1);
 204         memcpy(ad->ad_servername, servername, ad->ad_servernamelen + 1);
 205         ad->ad_window = window;
 206         if (ckey == NULL) {
 207                 if (key_gendes(&auth->ah_key) < 0) {
 208                         //syslog(LOG_ERR,
 209                         //              "authdes_seccreate: keyserv(1m) is unable to generate session key");
 210                         goto failed;
 211                 }
 212         } else {
 213                 auth->ah_key = *ckey;
 214         }
 215
 216         /*
 217          * Set up auth handle
 218          */
 219         auth->ah_cred.oa_flavor = AUTH_DES;
 220         auth->ah_verf.oa_flavor = AUTH_DES;
 221         auth->ah_ops = authdes_ops();
 222         auth->ah_private = (caddr_t)ad;
 223
 224         if (!authdes_refresh(auth, NULL)) {
 225                 goto failed;
 226         }
 227         ad->ad_nis_srvr = NULL; /* not needed any longer */
 228         return (auth);
 229
 230 failed:
 231         if (auth)
 232                 FREE(auth, sizeof (AUTH));
 233         if (ad) {
 234                 if (ad->ad_fullname)
 235                         FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
 236                 if (ad->ad_servername)
 237                         FREE(ad->ad_servername, ad->ad_servernamelen + 1);
 238                 if (ad->ad_timehost)
 239                         FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
 240                 if (ad->ad_netid)
 241                         FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
 242                 if (ad->ad_uaddr)
 243                         FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
 244                 FREE(ad, sizeof (struct ad_private));
 245         }
 246         return (NULL);
 247 }
 248
 249 /*
 250  * Implement the five authentication operations
 251  */
 252
 253
 254 /*
 255  * 1. Next Verifier
 256  */
 257 /*ARGSUSED*/
 258 static void
 259 authdes_nextverf(AUTH *auth)
 260 {
 261         /* what the heck am I supposed to do??? */
 262 }
 263
 264
 265 /*
 266  * 2. Marshal
 267  */
 268 static bool_t
 269 authdes_marshal(AUTH *auth, XDR *xdrs)
 270 {
 271 /* LINTED pointer alignment */
 272         struct ad_private *ad = AUTH_PRIVATE(auth);
 273         struct authdes_cred *cred = &ad->ad_cred;
 274         struct authdes_verf *verf = &ad->ad_verf;
 275         des_block cryptbuf[2];
 276         des_block ivec;
 277         int status;
 278         int len;
 279         rpc_inline_t *ixdr;
 280
 281         /*
 282          * Figure out the "time", accounting for any time difference
 283          * with the server if necessary.
 284          */
 285         (void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL);
 286         ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
 287         ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
 288         while (ad->ad_timestamp.tv_usec >= USEC_PER_SEC) {
 289                 ad->ad_timestamp.tv_usec -= USEC_PER_SEC;
 290                 ad->ad_timestamp.tv_sec++;
 291         }
 292
 293         /*
 294          * XDR the timestamp and possibly some other things, then
 295          * encrypt them.
 296          */
 297         ixdr = (rpc_inline_t *)cryptbuf;
 298         IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_sec);
 299         IXDR_PUT_INT32(ixdr, ad->ad_timestamp.tv_usec);
 300         if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
 301                 IXDR_PUT_U_INT32(ixdr, ad->ad_window);
 302                 IXDR_PUT_U_INT32(ixdr, ad->ad_window - 1);
 303                 ivec.key.high = ivec.key.low = 0;
 304                 status = cbc_crypt((char *)&auth->ah_key, (char *)cryptbuf,
 305                         (u_int) 2 * sizeof (des_block),
 306                         DES_ENCRYPT | DES_HW, (char *)&ivec);
 307         } else {
 308                 status = ecb_crypt((char *)&auth->ah_key, (char *)cryptbuf,
 309                         (u_int) sizeof (des_block),
 310                         DES_ENCRYPT | DES_HW);
 311         }
 312         if (DES_FAILED(status)) {
 313                 //syslog(LOG_ERR, "authdes_marshal: DES encryption failure");
 314                 return (FALSE);
 315         }
 316         ad->ad_verf.adv_xtimestamp = cryptbuf[0];
 317         if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
 318                 ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
 319                 ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
 320         } else {
 321                 ad->ad_cred.adc_nickname = ad->ad_nickname;
 322                 ad->ad_verf.adv_winverf = 0;
 323         }
 324
 325         /*
 326          * Serialize the credential and verifier into opaque
 327          * authentication data.
 328          */
 329         if (ad->ad_cred.adc_namekind == ADN_FULLNAME) {
 330                 len = ((1 + 1 + 2 + 1)*BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
 331         } else {
 332                 len = (1 + 1)*BYTES_PER_XDR_UNIT;
 333         }
 334
 335         if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
 336                 IXDR_PUT_INT32(ixdr, AUTH_DES);
 337                 IXDR_PUT_INT32(ixdr, len);
 338         } else {
 339                 ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_cred.oa_flavor));
 340                 ATTEMPT(xdr_putint32(xdrs, &len));
 341         }
 342         ATTEMPT(xdr_authdes_cred(xdrs, cred));
 343
 344         len = (2 + 1)*BYTES_PER_XDR_UNIT;
 345         if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) {
 346                 IXDR_PUT_INT32(ixdr, AUTH_DES);
 347                 IXDR_PUT_INT32(ixdr, len);
 348         } else {
 349                 ATTEMPT(xdr_putint32(xdrs, (int *)&auth->ah_verf.oa_flavor));
 350                 ATTEMPT(xdr_putint32(xdrs, &len));
 351         }
 352         ATTEMPT(xdr_authdes_verf(xdrs, verf));
 353         return (TRUE);
 354 }
 355
 356
 357 /*
 358  * 3. Validate
 359  */
 360 static bool_t
 361 authdes_validate(AUTH *auth, struct opaque_auth *rverf)
 362 {
 363 /* LINTED pointer alignment */
 364         struct ad_private *ad = AUTH_PRIVATE(auth);
 365         struct authdes_verf verf;
 366         int status;
 367         uint32_t *ixdr;
 368         des_block buf;
 369
 370         if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT) {
 371                 return (FALSE);
 372         }
 373 /* LINTED pointer alignment */
 374         ixdr = (uint32_t *)rverf->oa_base;
 375         buf.key.high = (uint32_t)*ixdr++;
 376         buf.key.low = (uint32_t)*ixdr++;
 377         verf.adv_int_u = (uint32_t)*ixdr++;
 378
 379         /*
 380          * Decrypt the timestamp
 381          */
 382         status = ecb_crypt((char *)&auth->ah_key, (char *)&buf,
 383                 (u_int)sizeof (des_block), DES_DECRYPT | DES_HW);
 384
 385         if (DES_FAILED(status)) {
 386                 //syslog(LOG_ERR, "authdes_validate: DES decryption failure");
 387                 return (FALSE);
 388         }
 389
 390         /*
 391          * xdr the decrypted timestamp
 392          */
 393 /* LINTED pointer alignment */
 394         ixdr = (uint32_t *)buf.c;
 395         verf.adv_timestamp.tv_sec = IXDR_GET_INT32(ixdr) + 1;
 396         verf.adv_timestamp.tv_usec = IXDR_GET_INT32(ixdr);
 397
 398         /*
 399          * validate
 400          */
 401         if (bcmp((char *)&ad->ad_timestamp, (char *)&verf.adv_timestamp,
 402                  sizeof(struct timeval)) != 0) {
 403                 //syslog(LOG_DEBUG, "authdes_validate: verifier mismatch");
 404                 return (FALSE);
 405         }
 406
 407         /*
 408          * We have a nickname now, let's use it
 409          */
 410         ad->ad_nickname = verf.adv_nickname;
 411         ad->ad_cred.adc_namekind = ADN_NICKNAME;
 412         return (TRUE);
 413 }
 414
 415 /*
 416  * 4. Refresh
 417  */
 418 /*ARGSUSED*/
 419 static bool_t
 420 authdes_refresh(AUTH *auth, void *dummy)
 421 {
 422 /* LINTED pointer alignment */
 423         struct ad_private *ad = AUTH_PRIVATE(auth);
 424         struct authdes_cred *cred = &ad->ad_cred;
 425         int             ok;
 426         netobj          pkey;
 427
 428         if (ad->ad_dosync) {
 429 #if 1 // WINDOWS
 430                 ok = 1;
 431 #else
 432                 ok = __rpc_get_time_offset(&ad->ad_timediff, ad->ad_nis_srvr,
 433                     ad->ad_timehost, &(ad->ad_uaddr),
 434                     &(ad->ad_netid));
 435 #endif
 436                 if (! ok) {
 437                         /*
 438                          * Hope the clocks are synced!
 439                          */
 440                         ad->ad_dosync = 0;
 441                         //syslog(LOG_DEBUG,
 442                         //    "authdes_refresh: unable to synchronize clock");
 443                  }
 444         }
 445         ad->ad_xkey = auth->ah_key;
 446         pkey.n_bytes = (char *)(ad->ad_pkey);
 447         pkey.n_len = (u_int)strlen((char *)ad->ad_pkey) + 1;
 448         if (key_encryptsession_pk(ad->ad_servername, &pkey, &ad->ad_xkey) < 0) {
 449                 //syslog(LOG_INFO,
 450                 //    "authdes_refresh: keyserv(1m) is unable to encrypt session key");
 451                 return (FALSE);
 452         }
 453         cred->adc_fullname.key = ad->ad_xkey;
 454         cred->adc_namekind = ADN_FULLNAME;
 455         cred->adc_fullname.name = ad->ad_fullname;
 456         return (TRUE);
 457 }
 458
 459
 460 /*
 461  * 5. Destroy
 462  */
 463 static void
 464 authdes_destroy(AUTH *auth)
 465 {
 466 /* LINTED pointer alignment */
 467         struct ad_private *ad = AUTH_PRIVATE(auth);
 468
 469         FREE(ad->ad_fullname, ad->ad_fullnamelen + 1);
 470         FREE(ad->ad_servername, ad->ad_servernamelen + 1);
 471         if (ad->ad_timehost)
 472                 FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1);
 473         if (ad->ad_netid)
 474                 FREE(ad->ad_netid, strlen(ad->ad_netid) + 1);
 475         if (ad->ad_uaddr)
 476                 FREE(ad->ad_uaddr, strlen(ad->ad_uaddr) + 1);
 477         FREE(ad, sizeof (struct ad_private));
 478         FREE(auth, sizeof(AUTH));
 479 }
 480
 481 static struct auth_ops *
 482 authdes_ops(void)
 483 {
 484         static struct auth_ops ops;
 485         extern mutex_t authdes_ops_lock;
 486
 487         /* VARIABLES PROTECTED BY ops_lock: ops */
 488
 489         mutex_lock(&authdes_ops_lock);
 490         if (ops.ah_nextverf == NULL) {
 491                 ops.ah_nextverf = authdes_nextverf;
 492                 ops.ah_marshal = authdes_marshal;
 493                 ops.ah_validate = authdes_validate;
 494                 ops.ah_refresh = authdes_refresh;
 495                 ops.ah_destroy = authdes_destroy;
 496         }
 497         mutex_unlock(&authdes_ops_lock);
 498         return (&ops);
 499 }