source3/libsmb/clitrans.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client transaction calls
   4    Copyright (C) Andrew Tridgell 1994-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23
  24 /****************************************************************************
  25  Send a SMB trans or trans2 request.
  26 ****************************************************************************/
  27
  28 BOOL cli_send_trans(struct cli_state *cli, int trans,
  29                     const char *pipe_name,
  30                     int fid, int flags,
  31                     uint16 *setup, unsigned int lsetup, unsigned int msetup,
  32                     const char *param, unsigned int lparam, unsigned int mparam,
  33                     const char *data, unsigned int ldata, unsigned int mdata)
  34 {
  35         unsigned int i;
  36         unsigned int this_ldata,this_lparam;
  37         unsigned int tot_data=0,tot_param=0;
  38         char *outdata,*outparam;
  39         char *p;
  40         int pipe_name_len=0;
  41         uint16 mid;
  42
  43         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
  44         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
  45
  46         memset(cli->outbuf,'\0',smb_size);
  47         set_message(cli->outbuf,14+lsetup,0,True);
  48         SCVAL(cli->outbuf,smb_com,trans);
  49         SSVAL(cli->outbuf,smb_tid, cli->cnum);
  50         cli_setup_packet(cli);
  51
  52         /*
  53          * Save the mid we're using. We need this for finding
  54          * signing replies.
  55          */
  56
  57         mid = cli->mid;
  58
  59         if (pipe_name) {
  60                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  61         }
  62
  63         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  64         outdata = outparam+this_lparam;
  65
  66         /* primary request */
  67         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  68         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  69         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  70         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  71         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  72         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  73         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  74         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  75         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  76         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  77         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  78         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  79         for (i=0;i<lsetup;i++)          /* setup[] */
  80                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  81         p = smb_buf(cli->outbuf);
  82         if (trans != SMBtrans) {
  83                 *p++ = 0;  /* put in a null smb_name */
  84                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  85         }
  86         if (this_lparam)                        /* param[] */
  87                 memcpy(outparam,param,this_lparam);
  88         if (this_ldata)                 /* data[] */
  89                 memcpy(outdata,data,this_ldata);
  90         cli_setup_bcc(cli, outdata+this_ldata);
  91
  92         show_msg(cli->outbuf);
  93
  94         if (!cli_send_smb(cli)) {
  95                 return False;
  96         }
  97
  98         if (this_ldata < ldata || this_lparam < lparam) {
  99                 /* receive interim response */
 100                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 101                         return(False);
 102                 }
 103
 104                 tot_data = this_ldata;
 105                 tot_param = this_lparam;
 106
 107                 while (tot_data < ldata || tot_param < lparam)  {
 108                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 109                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 110
 111                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 112                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 113
 114                         outparam = smb_buf(cli->outbuf);
 115                         outdata = outparam+this_lparam;
 116
 117                         /* secondary request */
 118                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 119                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 120                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 121                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 122                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 123                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 124                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 125                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 126                         if (trans==SMBtrans2)
 127                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 128                         if (this_lparam)                        /* param[] */
 129                                 memcpy(outparam,param+tot_param,this_lparam);
 130                         if (this_ldata)                 /* data[] */
 131                                 memcpy(outdata,data+tot_data,this_ldata);
 132                         cli_setup_bcc(cli, outdata+this_ldata);
 133
 134                         /*
 135                          * Save the mid we're using. We need this for finding
 136                          * signing replies.
 137                          */
 138                         mid = cli->mid;
 139
 140                         show_msg(cli->outbuf);
 141                         if (!cli_send_smb(cli)) {
 142                                 return False;
 143                         }
 144
 145                         /* Ensure we use the same mid for the secondaries. */
 146                         cli->mid = mid;
 147
 148                         tot_data += this_ldata;
 149                         tot_param += this_lparam;
 150                 }
 151         }
 152
 153         /* Note we're in a trans state. Save the sequence
 154          * numbers for replies. */
 155
 156         cli_signing_trans_start(cli, mid);
 157         return(True);
 158 }
 159
 160 /****************************************************************************
 161  Receive a SMB trans or trans2 response allocating the necessary memory.
 162 ****************************************************************************/
 163
 164 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 165                               char **param, unsigned int *param_len,
 166                               char **data, unsigned int *data_len)
 167 {
 168         unsigned int total_data=0;
 169         unsigned int total_param=0;
 170         unsigned int this_data,this_param;
 171         NTSTATUS status;
 172
 173         *data_len = *param_len = 0;
 174
 175         if (!cli_receive_smb(cli)) {
 176                 cli_signing_trans_stop(cli);
 177                 return False;
 178         }
 179
 180         show_msg(cli->inbuf);
 181
 182         /* sanity check */
 183         if (CVAL(cli->inbuf,smb_com) != trans) {
 184                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 185                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 186                          CVAL(cli->inbuf,smb_com)));
 187                 cli_signing_trans_stop(cli);
 188                 return(False);
 189         }
 190
 191         /*
 192          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 193          * to a trans call. This is not an error and should not
 194          * be treated as such. Note that STATUS_NO_MORE_FILES is
 195          * returned when a trans2 findfirst/next finishes.
 196          */
 197         status = cli_nt_error(cli);
 198
 199         if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
 200                 cli_signing_trans_stop(cli);
 201                 return False;
 202         }
 203
 204         /* parse out the lengths */
 205         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 206         total_param = SVAL(cli->inbuf,smb_tprcnt);
 207
 208         /* allocate it */
 209         if (total_data!=0) {
 210                 *data = SMB_REALLOC(*data,total_data);
 211                 if (!(*data)) {
 212                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 213                         cli_signing_trans_stop(cli);
 214                         return False;
 215                 }
 216         }
 217
 218         if (total_param!=0) {
 219                 *param = SMB_REALLOC(*param,total_param);
 220                 if (!(*param)) {
 221                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 222                         cli_signing_trans_stop(cli);
 223                         return False;
 224                 }
 225         }
 226
 227         for (;;)  {
 228                 this_data = SVAL(cli->inbuf,smb_drcnt);
 229                 this_param = SVAL(cli->inbuf,smb_prcnt);
 230
 231                 if (this_data + *data_len > total_data ||
 232                     this_param + *param_len > total_param) {
 233                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 234                         cli_signing_trans_stop(cli);
 235                         return False;
 236                 }
 237
 238                 if (this_data + *data_len < this_data ||
 239                                 this_data + *data_len < *data_len ||
 240                                 this_param + *param_len < this_param ||
 241                                 this_param + *param_len < *param_len) {
 242                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 243                         cli_signing_trans_stop(cli);
 244                         return False;
 245                 }
 246
 247                 if (this_data) {
 248                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 249                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 250
 251                         if (data_offset_out > total_data ||
 252                                         data_offset_out + this_data > total_data ||
 253                                         data_offset_out + this_data < data_offset_out ||
 254                                         data_offset_out + this_data < this_data) {
 255                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 256                                 cli_signing_trans_stop(cli);
 257                                 return False;
 258                         }
 259                         if (data_offset_in > cli->bufsize ||
 260                                         data_offset_in + this_data >  cli->bufsize ||
 261                                         data_offset_in + this_data < data_offset_in ||
 262                                         data_offset_in + this_data < this_data) {
 263                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 264                                 cli_signing_trans_stop(cli);
 265                                 return False;
 266                         }
 267
 268                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 269                 }
 270                 if (this_param) {
 271                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 272                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 273
 274                         if (param_offset_out > total_param ||
 275                                         param_offset_out + this_param > total_param ||
 276                                         param_offset_out + this_param < param_offset_out ||
 277                                         param_offset_out + this_param < this_param) {
 278                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 279                                 cli_signing_trans_stop(cli);
 280                                 return False;
 281                         }
 282                         if (param_offset_in > cli->bufsize ||
 283                                         param_offset_in + this_param >  cli->bufsize ||
 284                                         param_offset_in + this_param < param_offset_in ||
 285                                         param_offset_in + this_param < this_param) {
 286                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 287                                 cli_signing_trans_stop(cli);
 288                                 return False;
 289                         }
 290
 291                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 292                 }
 293                 *data_len += this_data;
 294                 *param_len += this_param;
 295
 296                 if (total_data <= *data_len && total_param <= *param_len)
 297                         break;
 298
 299                 if (!cli_receive_smb(cli)) {
 300                         cli_signing_trans_stop(cli);
 301                         return False;
 302                 }
 303
 304                 show_msg(cli->inbuf);
 305
 306                 /* sanity check */
 307                 if (CVAL(cli->inbuf,smb_com) != trans) {
 308                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 309                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 310                                  CVAL(cli->inbuf,smb_com)));
 311                         cli_signing_trans_stop(cli);
 312                         return(False);
 313                 }
 314                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 315                         cli_signing_trans_stop(cli);
 316                         return(False);
 317                 }
 318
 319                 /* parse out the total lengths again - they can shrink! */
 320                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 321                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 322                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 323                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 324
 325                 if (total_data <= *data_len && total_param <= *param_len)
 326                         break;
 327
 328         }
 329
 330         cli_signing_trans_stop(cli);
 331         return(True);
 332 }
 333
 334 /****************************************************************************
 335  Send a SMB nttrans request.
 336 ****************************************************************************/
 337
 338 BOOL cli_send_nt_trans(struct cli_state *cli,
 339                        int function,
 340                        int flags,
 341                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 342                        char *param, unsigned int lparam, unsigned int mparam,
 343                        char *data, unsigned int ldata, unsigned int mdata)
 344 {
 345         unsigned int i;
 346         unsigned int this_ldata,this_lparam;
 347         unsigned int tot_data=0,tot_param=0;
 348         uint16 mid;
 349         char *outdata,*outparam;
 350
 351         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 352         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 353
 354         memset(cli->outbuf,'\0',smb_size);
 355         set_message(cli->outbuf,19+lsetup,0,True);
 356         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 357         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 358         cli_setup_packet(cli);
 359
 360         /*
 361          * Save the mid we're using. We need this for finding
 362          * signing replies.
 363          */
 364
 365         mid = cli->mid;
 366
 367         outparam = smb_buf(cli->outbuf)+3;
 368         outdata = outparam+this_lparam;
 369
 370         /* primary request */
 371         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 372         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 373         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 374         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 375         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 376         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 377         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 378         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 379         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 380         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 381         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 382         SIVAL(cli->outbuf,smb_nt_Function, function);
 383         for (i=0;i<lsetup;i++)          /* setup[] */
 384                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 385
 386         if (this_lparam)                        /* param[] */
 387                 memcpy(outparam,param,this_lparam);
 388         if (this_ldata)                 /* data[] */
 389                 memcpy(outdata,data,this_ldata);
 390
 391         cli_setup_bcc(cli, outdata+this_ldata);
 392
 393         show_msg(cli->outbuf);
 394         if (!cli_send_smb(cli)) {
 395                 return False;
 396         }
 397
 398         if (this_ldata < ldata || this_lparam < lparam) {
 399                 /* receive interim response */
 400                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 401                         return(False);
 402                 }
 403
 404                 tot_data = this_ldata;
 405                 tot_param = this_lparam;
 406
 407                 while (tot_data < ldata || tot_param < lparam)  {
 408                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 409                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 410
 411                         set_message(cli->outbuf,18,0,True);
 412                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 413
 414                         /* XXX - these should probably be aligned */
 415                         outparam = smb_buf(cli->outbuf);
 416                         outdata = outparam+this_lparam;
 417
 418                         /* secondary request */
 419                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 420                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 421                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 422                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 423                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 424                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 425                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 426                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 427                         if (this_lparam)                        /* param[] */
 428                                 memcpy(outparam,param+tot_param,this_lparam);
 429                         if (this_ldata)                 /* data[] */
 430                                 memcpy(outdata,data+tot_data,this_ldata);
 431                         cli_setup_bcc(cli, outdata+this_ldata);
 432
 433                         /*
 434                          * Save the mid we're using. We need this for finding
 435                          * signing replies.
 436                          */
 437                         mid = cli->mid;
 438
 439                         show_msg(cli->outbuf);
 440
 441                         if (!cli_send_smb(cli)) {
 442                                 return False;
 443                         }
 444
 445                         /* Ensure we use the same mid for the secondaries. */
 446                         cli->mid = mid;
 447
 448                         tot_data += this_ldata;
 449                         tot_param += this_lparam;
 450                 }
 451         }
 452
 453         /* Note we're in a trans state. Save the sequence
 454          * numbers for replies. */
 455
 456         cli_signing_trans_start(cli, mid);
 457         return(True);
 458 }
 459
 460 /****************************************************************************
 461  Receive a SMB nttrans response allocating the necessary memory.
 462 ****************************************************************************/
 463
 464 BOOL cli_receive_nt_trans(struct cli_state *cli,
 465                           char **param, unsigned int *param_len,
 466                           char **data, unsigned int *data_len)
 467 {
 468         unsigned int total_data=0;
 469         unsigned int total_param=0;
 470         unsigned int this_data,this_param;
 471         uint8 eclass;
 472         uint32 ecode;
 473
 474         *data_len = *param_len = 0;
 475
 476         if (!cli_receive_smb(cli)) {
 477                 cli_signing_trans_stop(cli);
 478                 return False;
 479         }
 480
 481         show_msg(cli->inbuf);
 482
 483         /* sanity check */
 484         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 485                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 486                          CVAL(cli->inbuf,smb_com)));
 487                 cli_signing_trans_stop(cli);
 488                 return(False);
 489         }
 490
 491         /*
 492          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 493          * to a trans call. This is not an error and should not
 494          * be treated as such.
 495          */
 496         if (cli_is_dos_error(cli)) {
 497                 cli_dos_error(cli, &eclass, &ecode);
 498                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 499                         cli_signing_trans_stop(cli);
 500                         return(False);
 501                 }
 502         }
 503
 504         /*
 505          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 506          */
 507         if (cli_is_nt_error(cli)) {
 508                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 509                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 510                         cli_signing_trans_stop(cli);
 511                         return(False);
 512                 }
 513         }
 514
 515         /* parse out the lengths */
 516         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 517         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 518
 519         /* allocate it */
 520         if (total_data) {
 521                 *data = SMB_REALLOC(*data,total_data);
 522                 if (!(*data)) {
 523                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 524                         cli_signing_trans_stop(cli);
 525                         return False;
 526                 }
 527         }
 528
 529         if (total_param) {
 530                 *param = SMB_REALLOC(*param,total_param);
 531                 if (!(*param)) {
 532                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 533                         cli_signing_trans_stop(cli);
 534                         return False;
 535                 }
 536         }
 537
 538         while (1)  {
 539                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 540                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 541
 542                 if (this_data + *data_len > total_data ||
 543                     this_param + *param_len > total_param) {
 544                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 545                         cli_signing_trans_stop(cli);
 546                         return False;
 547                 }
 548
 549                 if (this_data + *data_len < this_data ||
 550                                 this_data + *data_len < *data_len ||
 551                                 this_param + *param_len < this_param ||
 552                                 this_param + *param_len < *param_len) {
 553                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 554                         cli_signing_trans_stop(cli);
 555                         return False;
 556                 }
 557
 558                 if (this_data) {
 559                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 560                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 561
 562                         if (data_offset_out > total_data ||
 563                                         data_offset_out + this_data > total_data ||
 564                                         data_offset_out + this_data < data_offset_out ||
 565                                         data_offset_out + this_data < this_data) {
 566                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 567                                 cli_signing_trans_stop(cli);
 568                                 return False;
 569                         }
 570                         if (data_offset_in > cli->bufsize ||
 571                                         data_offset_in + this_data >  cli->bufsize ||
 572                                         data_offset_in + this_data < data_offset_in ||
 573                                         data_offset_in + this_data < this_data) {
 574                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 575                                 cli_signing_trans_stop(cli);
 576                                 return False;
 577                         }
 578
 579                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 580                 }
 581
 582                 if (this_param) {
 583                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 584                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 585
 586                         if (param_offset_out > total_param ||
 587                                         param_offset_out + this_param > total_param ||
 588                                         param_offset_out + this_param < param_offset_out ||
 589                                         param_offset_out + this_param < this_param) {
 590                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 591                                 cli_signing_trans_stop(cli);
 592                                 return False;
 593                         }
 594                         if (param_offset_in > cli->bufsize ||
 595                                         param_offset_in + this_param >  cli->bufsize ||
 596                                         param_offset_in + this_param < param_offset_in ||
 597                                         param_offset_in + this_param < this_param) {
 598                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 599                                 cli_signing_trans_stop(cli);
 600                                 return False;
 601                         }
 602
 603                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 604                 }
 605
 606                 *data_len += this_data;
 607                 *param_len += this_param;
 608
 609                 if (total_data <= *data_len && total_param <= *param_len)
 610                         break;
 611
 612                 if (!cli_receive_smb(cli)) {
 613                         cli_signing_trans_stop(cli);
 614                         return False;
 615                 }
 616
 617                 show_msg(cli->inbuf);
 618
 619                 /* sanity check */
 620                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 621                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 622                                  CVAL(cli->inbuf,smb_com)));
 623                         cli_signing_trans_stop(cli);
 624                         return(False);
 625                 }
 626                 if (cli_is_dos_error(cli)) {
 627                         cli_dos_error(cli, &eclass, &ecode);
 628                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 629                                 cli_signing_trans_stop(cli);
 630                                 return(False);
 631                         }
 632                 }
 633                 /*
 634                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 635                  */
 636                 if (cli_is_nt_error(cli)) {
 637                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 638                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 639                                 cli_signing_trans_stop(cli);
 640                                 return(False);
 641                         }
 642                 }
 643
 644                 /* parse out the total lengths again - they can shrink! */
 645                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 646                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 647                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 648                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 649
 650                 if (total_data <= *data_len && total_param <= *param_len)
 651                         break;
 652         }
 653
 654         cli_signing_trans_stop(cli);
 655         return(True);
 656 }