libcli/smb/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client file operations
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jeremy Allison 2001-2002
   6    Copyright (C) James Myers 2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/smb/smb_common.h"
  24 #include "system/filesys.h"
  25 #include "lib/param/loadparm.h"
  26 #include "lib/param/param.h"
  27 #include "libcli/smb/smb2_negotiate_context.h"
  28
  29 const char *smb_protocol_types_string(enum protocol_types protocol)
  30 {
  31         switch (protocol) {
  32         case PROTOCOL_DEFAULT:
  33                 return "DEFAULT";
  34         case PROTOCOL_NONE:
  35                 return "NONE";
  36         case PROTOCOL_CORE:
  37                 return "CORE";
  38         case PROTOCOL_COREPLUS:
  39                 return "COREPLUS";
  40         case PROTOCOL_LANMAN1:
  41                 return "LANMAN1";
  42         case PROTOCOL_LANMAN2:
  43                 return "LANMAN2";
  44         case PROTOCOL_NT1:
  45                 return "NT1";
  46         case PROTOCOL_SMB2_02:
  47                 return "SMB2_02";
  48         case PROTOCOL_SMB2_10:
  49                 return "SMB2_10";
  50         case PROTOCOL_SMB3_00:
  51                 return "SMB3_00";
  52         case PROTOCOL_SMB3_02:
  53                 return "SMB3_02";
  54         case PROTOCOL_SMB3_11:
  55                 return "SMB3_11";
  56         }
  57
  58         return "Invalid protocol_types value";
  59 }
  60
  61 /**
  62  Return a string representing a CIFS attribute for a file.
  63 **/
  64 char *attrib_string(TALLOC_CTX *mem_ctx, uint32_t attrib)
  65 {
  66         size_t i, len;
  67         static const struct {
  68                 char c;
  69                 uint16_t attr;
  70         } attr_strs[] = {
  71                 {'V', FILE_ATTRIBUTE_VOLUME},
  72                 {'D', FILE_ATTRIBUTE_DIRECTORY},
  73                 {'A', FILE_ATTRIBUTE_ARCHIVE},
  74                 {'H', FILE_ATTRIBUTE_HIDDEN},
  75                 {'S', FILE_ATTRIBUTE_SYSTEM},
  76                 {'N', FILE_ATTRIBUTE_NORMAL},
  77                 {'R', FILE_ATTRIBUTE_READONLY},
  78                 {'d', FILE_ATTRIBUTE_DEVICE},
  79                 {'t', FILE_ATTRIBUTE_TEMPORARY},
  80                 {'s', FILE_ATTRIBUTE_SPARSE},
  81                 {'r', FILE_ATTRIBUTE_REPARSE_POINT},
  82                 {'c', FILE_ATTRIBUTE_COMPRESSED},
  83                 {'o', FILE_ATTRIBUTE_OFFLINE},
  84                 {'n', FILE_ATTRIBUTE_NONINDEXED},
  85                 {'e', FILE_ATTRIBUTE_ENCRYPTED}
  86         };
  87         char *ret;
  88
  89         ret = talloc_array(mem_ctx, char, ARRAY_SIZE(attr_strs)+1);
  90         if (!ret) {
  91                 return NULL;
  92         }
  93
  94         for (len=i=0; i<ARRAY_SIZE(attr_strs); i++) {
  95                 if (attrib & attr_strs[i].attr) {
  96                         ret[len++] = attr_strs[i].c;
  97                 }
  98         }
  99
 100         ret[len] = 0;
 101
 102         talloc_set_name_const(ret, ret);
 103
 104         return ret;
 105 }
 106
 107 /****************************************************************************
 108  Map standard UNIX permissions onto wire representations.
 109 ****************************************************************************/
 110
 111 uint32_t unix_perms_to_wire(mode_t perms)
 112 {
 113         unsigned int ret = 0;
 114
 115         ret |= ((perms & S_IXOTH) ?  UNIX_X_OTH : 0);
 116         ret |= ((perms & S_IWOTH) ?  UNIX_W_OTH : 0);
 117         ret |= ((perms & S_IROTH) ?  UNIX_R_OTH : 0);
 118         ret |= ((perms & S_IXGRP) ?  UNIX_X_GRP : 0);
 119         ret |= ((perms & S_IWGRP) ?  UNIX_W_GRP : 0);
 120         ret |= ((perms & S_IRGRP) ?  UNIX_R_GRP : 0);
 121         ret |= ((perms & S_IXUSR) ?  UNIX_X_USR : 0);
 122         ret |= ((perms & S_IWUSR) ?  UNIX_W_USR : 0);
 123         ret |= ((perms & S_IRUSR) ?  UNIX_R_USR : 0);
 124 #ifdef S_ISVTX
 125         ret |= ((perms & S_ISVTX) ?  UNIX_STICKY : 0);
 126 #endif
 127 #ifdef S_ISGID
 128         ret |= ((perms & S_ISGID) ?  UNIX_SET_GID : 0);
 129 #endif
 130 #ifdef S_ISUID
 131         ret |= ((perms & S_ISUID) ?  UNIX_SET_UID : 0);
 132 #endif
 133         return ret;
 134 }
 135
 136 /****************************************************************************
 137  Map wire permissions to standard UNIX.
 138 ****************************************************************************/
 139
 140 mode_t wire_perms_to_unix(uint32_t perms)
 141 {
 142         mode_t ret = (mode_t)0;
 143
 144         ret |= ((perms & UNIX_X_OTH) ? S_IXOTH : 0);
 145         ret |= ((perms & UNIX_W_OTH) ? S_IWOTH : 0);
 146         ret |= ((perms & UNIX_R_OTH) ? S_IROTH : 0);
 147         ret |= ((perms & UNIX_X_GRP) ? S_IXGRP : 0);
 148         ret |= ((perms & UNIX_W_GRP) ? S_IWGRP : 0);
 149         ret |= ((perms & UNIX_R_GRP) ? S_IRGRP : 0);
 150         ret |= ((perms & UNIX_X_USR) ? S_IXUSR : 0);
 151         ret |= ((perms & UNIX_W_USR) ? S_IWUSR : 0);
 152         ret |= ((perms & UNIX_R_USR) ? S_IRUSR : 0);
 153 #ifdef S_ISVTX
 154         ret |= ((perms & UNIX_STICKY) ? S_ISVTX : 0);
 155 #endif
 156 #ifdef S_ISGID
 157         ret |= ((perms & UNIX_SET_GID) ? S_ISGID : 0);
 158 #endif
 159 #ifdef S_ISUID
 160         ret |= ((perms & UNIX_SET_UID) ? S_ISUID : 0);
 161 #endif
 162         return ret;
 163 }
 164
 165 /****************************************************************************
 166  Return the file type from the wire filetype for UNIX extensions.
 167 ****************************************************************************/
 168
 169 mode_t unix_filetype_from_wire(uint32_t wire_type)
 170 {
 171         switch (wire_type) {
 172                 case UNIX_TYPE_FILE:
 173                         return S_IFREG;
 174                 case UNIX_TYPE_DIR:
 175                         return S_IFDIR;
 176 #ifdef S_IFLNK
 177                 case UNIX_TYPE_SYMLINK:
 178                         return S_IFLNK;
 179 #endif
 180 #ifdef S_IFCHR
 181                 case UNIX_TYPE_CHARDEV:
 182                         return S_IFCHR;
 183 #endif
 184 #ifdef S_IFBLK
 185                 case UNIX_TYPE_BLKDEV:
 186                         return S_IFBLK;
 187 #endif
 188 #ifdef S_IFIFO
 189                 case UNIX_TYPE_FIFO:
 190                         return S_IFIFO;
 191 #endif
 192 #ifdef S_IFSOCK
 193                 case UNIX_TYPE_SOCKET:
 194                         return S_IFSOCK;
 195 #endif
 196                 default:
 197                         return (mode_t)0;
 198         }
 199 }
 200
 201 bool smb_buffer_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
 202 {
 203         if ((offset + length < offset) || (offset + length < length)) {
 204                 /* wrap */
 205                 return true;
 206         }
 207         if ((offset > bufsize) || (offset + length > bufsize)) {
 208                 /* overflow */
 209                 return true;
 210         }
 211         return false;
 212 }
 213
 214 /***********************************************************
 215  Common function for pushing strings, used by smb_bytes_push_str()
 216  and trans_bytes_push_str(). Only difference is the align_odd
 217  parameter setting.
 218 ***********************************************************/
 219
 220 static uint8_t *internal_bytes_push_str(uint8_t *buf, bool ucs2,
 221                                         const char *str, size_t str_len,
 222                                         bool align_odd,
 223                                         size_t *pconverted_size)
 224 {
 225         TALLOC_CTX *frame = talloc_stackframe();
 226         size_t buflen;
 227         char *converted;
 228         size_t converted_size;
 229
 230         /*
 231          * This check prevents us from
 232          * (re)alloc buf on a NULL TALLOC_CTX.
 233          */
 234         if (buf == NULL) {
 235                 TALLOC_FREE(frame);
 236                 return NULL;
 237         }
 238
 239         buflen = talloc_get_size(buf);
 240
 241         if (ucs2 &&
 242             ((align_odd && (buflen % 2 == 0)) ||
 243              (!align_odd && (buflen % 2 == 1)))) {
 244                 /*
 245                  * We're pushing into an SMB buffer, align odd
 246                  */
 247                 buf = talloc_realloc(NULL, buf, uint8_t, buflen + 1);
 248                 if (buf == NULL) {
 249                         TALLOC_FREE(frame);
 250                         return NULL;
 251                 }
 252                 buf[buflen] = '\0';
 253                 buflen += 1;
 254         }
 255
 256         if (!convert_string_talloc(frame, CH_UNIX,
 257                                    ucs2 ? CH_UTF16LE : CH_DOS,
 258                                    str, str_len, &converted,
 259                                    &converted_size)) {
 260                 TALLOC_FREE(frame);
 261                 return NULL;
 262         }
 263
 264         buf = talloc_realloc(NULL, buf, uint8_t,
 265                              buflen + converted_size);
 266         if (buf == NULL) {
 267                 TALLOC_FREE(frame);
 268                 return NULL;
 269         }
 270
 271         memcpy(buf + buflen, converted, converted_size);
 272
 273         TALLOC_FREE(converted);
 274
 275         if (pconverted_size) {
 276                 *pconverted_size = converted_size;
 277         }
 278
 279         TALLOC_FREE(frame);
 280         return buf;
 281 }
 282
 283 /***********************************************************
 284  Push a string into an SMB buffer, with odd byte alignment
 285  if it's a UCS2 string.
 286 ***********************************************************/
 287
 288 uint8_t *smb_bytes_push_str(uint8_t *buf, bool ucs2,
 289                             const char *str, size_t str_len,
 290                             size_t *pconverted_size)
 291 {
 292         return internal_bytes_push_str(buf, ucs2, str, str_len,
 293                                        true, pconverted_size);
 294 }
 295
 296 uint8_t *smb_bytes_push_bytes(uint8_t *buf, uint8_t prefix,
 297                               const uint8_t *bytes, size_t num_bytes)
 298 {
 299         size_t buflen;
 300
 301         /*
 302          * This check prevents us from
 303          * (re)alloc buf on a NULL TALLOC_CTX.
 304          */
 305         if (buf == NULL) {
 306                 return NULL;
 307         }
 308         buflen = talloc_get_size(buf);
 309
 310         buf = talloc_realloc(NULL, buf, uint8_t,
 311                              buflen + 1 + num_bytes);
 312         if (buf == NULL) {
 313                 return NULL;
 314         }
 315         buf[buflen] = prefix;
 316         memcpy(&buf[buflen+1], bytes, num_bytes);
 317         return buf;
 318 }
 319
 320 /***********************************************************
 321  Same as smb_bytes_push_str(), but without the odd byte
 322  align for ucs2 (we're pushing into a param or data block).
 323  static for now, although this will probably change when
 324  other modules use async trans calls.
 325 ***********************************************************/
 326
 327 uint8_t *trans2_bytes_push_str(uint8_t *buf, bool ucs2,
 328                                const char *str, size_t str_len,
 329                                size_t *pconverted_size)
 330 {
 331         return internal_bytes_push_str(buf, ucs2, str, str_len,
 332                                        false, pconverted_size);
 333 }
 334
 335 uint8_t *trans2_bytes_push_bytes(uint8_t *buf,
 336                                  const uint8_t *bytes, size_t num_bytes)
 337 {
 338         size_t buflen;
 339
 340         if (buf == NULL) {
 341                 return NULL;
 342         }
 343         buflen = talloc_get_size(buf);
 344
 345         buf = talloc_realloc(NULL, buf, uint8_t,
 346                              buflen + num_bytes);
 347         if (buf == NULL) {
 348                 return NULL;
 349         }
 350         memcpy(&buf[buflen], bytes, num_bytes);
 351         return buf;
 352 }
 353
 354 static NTSTATUS internal_bytes_pull_str(TALLOC_CTX *mem_ctx, char **_str,
 355                                         bool ucs2, bool align_odd,
 356                                         const uint8_t *buf, size_t buf_len,
 357                                         const uint8_t *position,
 358                                         size_t *p_consumed)
 359 {
 360         size_t pad = 0;
 361         size_t offset;
 362         char *str = NULL;
 363         size_t str_len = 0;
 364         bool ok;
 365
 366         *_str = NULL;
 367         if (p_consumed != NULL) {
 368                 *p_consumed = 0;
 369         }
 370
 371         if (position < buf) {
 372                 return NT_STATUS_INTERNAL_ERROR;
 373         }
 374
 375         offset = PTR_DIFF(position, buf);
 376         if (offset > buf_len) {
 377                 return NT_STATUS_BUFFER_TOO_SMALL;
 378         }
 379
 380         if (ucs2 &&
 381             ((align_odd && (offset % 2 == 0)) ||
 382              (!align_odd && (offset % 2 == 1)))) {
 383                 pad += 1;
 384                 offset += 1;
 385         }
 386
 387         if (offset > buf_len) {
 388                 return NT_STATUS_BUFFER_TOO_SMALL;
 389         }
 390
 391         buf_len -= offset;
 392         buf += offset;
 393
 394         if (ucs2) {
 395                 buf_len = utf16_len_n(buf, buf_len);
 396         } else {
 397                 size_t tmp = strnlen((const char *)buf, buf_len);
 398                 if (tmp < buf_len) {
 399                         tmp += 1;
 400                 }
 401                 buf_len = tmp;
 402         }
 403
 404         ok = convert_string_talloc(mem_ctx,
 405                                    ucs2 ? CH_UTF16LE : CH_DOS,
 406                                    CH_UNIX,
 407                                    buf, buf_len,
 408                                    &str, &str_len);
 409         if (!ok) {
 410                 return map_nt_error_from_unix_common(errno);
 411         }
 412
 413         if (p_consumed != NULL) {
 414                 *p_consumed = buf_len + pad;
 415         }
 416         *_str = str;
 417         return NT_STATUS_OK;
 418 }
 419
 420 NTSTATUS smb_bytes_pull_str(TALLOC_CTX *mem_ctx, char **_str, bool ucs2,
 421                             const uint8_t *buf, size_t buf_len,
 422                             const uint8_t *position,
 423                             size_t *_consumed)
 424 {
 425         return internal_bytes_pull_str(mem_ctx, _str, ucs2, true,
 426                                        buf, buf_len, position, _consumed);
 427 }
 428
 429 /**
 430  * @brief Translate SMB signing settings as string to an enum.
 431  *
 432  * @param[in]  str  The string to translate.
 433  *
 434  * @return A corresponding enum @smb_signing_setting translated from the string.
 435  */
 436 enum smb_signing_setting smb_signing_setting_translate(const char *str)
 437 {
 438         enum smb_signing_setting signing_state = SMB_SIGNING_REQUIRED;
 439         int32_t val = lpcfg_parse_enum_vals("client signing", str);
 440
 441         if (val != INT32_MIN) {
 442                 signing_state = val;
 443         }
 444
 445         return signing_state;
 446 }
 447
 448 /**
 449  * @brief Translate SMB encryption settings as string to an enum.
 450  *
 451  * @param[in]  str  The string to translate.
 452  *
 453  * @return A corresponding enum @smb_encryption_setting translated from the
 454  *         string.
 455  */
 456 enum smb_encryption_setting smb_encryption_setting_translate(const char *str)
 457 {
 458         enum smb_encryption_setting encryption_state = SMB_ENCRYPTION_REQUIRED;
 459         int32_t val = lpcfg_parse_enum_vals("client smb encrypt", str);
 460
 461         if (val != INT32_MIN) {
 462                 encryption_state = val;
 463         }
 464
 465         return encryption_state;
 466 }
 467
 468 static const struct enum_list enum_smb3_signing_algorithms[] = {
 469         {SMB2_SIGNING_AES128_GMAC, "AES-128-GMAC"},
 470         {SMB2_SIGNING_AES128_CMAC, "AES-128-CMAC"},
 471         {SMB2_SIGNING_HMAC_SHA256, "HMAC-SHA256"},
 472         {-1, NULL}
 473 };
 474
 475 const char *smb3_signing_algorithm_name(uint16_t algo)
 476 {
 477         size_t i;
 478
 479         for (i = 0; i < ARRAY_SIZE(enum_smb3_signing_algorithms); i++) {
 480                 if (enum_smb3_signing_algorithms[i].value != algo) {
 481                         continue;
 482                 }
 483
 484                 return enum_smb3_signing_algorithms[i].name;
 485         }
 486
 487         return NULL;
 488 }
 489
 490 static const struct enum_list enum_smb3_encryption_algorithms[] = {
 491         {SMB2_ENCRYPTION_AES128_GCM, "AES-128-GCM"},
 492         {SMB2_ENCRYPTION_AES128_CCM, "AES-128-CCM"},
 493         {SMB2_ENCRYPTION_AES256_GCM, "AES-256-GCM"},
 494         {SMB2_ENCRYPTION_AES256_CCM, "AES-256-CCM"},
 495         {-1, NULL}
 496 };
 497
 498 const char *smb3_encryption_algorithm_name(uint16_t algo)
 499 {
 500         size_t i;
 501
 502         for (i = 0; i < ARRAY_SIZE(enum_smb3_encryption_algorithms); i++) {
 503                 if (enum_smb3_encryption_algorithms[i].value != algo) {
 504                         continue;
 505                 }
 506
 507                 return enum_smb3_encryption_algorithms[i].name;
 508         }
 509
 510         return NULL;
 511 }
 512
 513 static int32_t parse_enum_val(const struct enum_list *e,
 514                               const char *param_name,
 515                               const char *param_value)
 516 {
 517         struct parm_struct parm = {
 518                 .label = param_name,
 519                 .type = P_LIST,
 520                 .p_class = P_GLOBAL,
 521                 .enum_list = e,
 522         };
 523         int32_t ret = INT32_MIN;
 524         bool ok;
 525
 526         ok = lp_set_enum_parm(&parm, param_value, &ret);
 527         if (!ok) {
 528                 return INT32_MIN;
 529         }
 530
 531         return ret;
 532 }
 533
 534 struct smb311_capabilities smb311_capabilities_parse(const char *role,
 535                                 const char * const *signing_algos,
 536                                 const char * const *encryption_algos)
 537 {
 538         struct smb311_capabilities c = {
 539                 .signing = {
 540                         .num_algos = 0,
 541                 },
 542                 .encryption = {
 543                         .num_algos = 0,
 544                 },
 545         };
 546         char sign_param[64] = { 0, };
 547         char enc_param[64] = { 0, };
 548         size_t ai;
 549
 550         snprintf(sign_param, sizeof(sign_param),
 551                  "%s smb3 signing algorithms", role);
 552         snprintf(enc_param, sizeof(enc_param),
 553                  "%s smb3 encryption algorithms", role);
 554
 555         for (ai = 0; signing_algos != NULL && signing_algos[ai] != NULL; ai++) {
 556                 const char *algoname = signing_algos[ai];
 557                 int32_t v32;
 558                 uint16_t algo;
 559                 size_t di;
 560                 bool ignore = false;
 561
 562                 if (c.signing.num_algos >= SMB3_ENCRYTION_CAPABILITIES_MAX_ALGOS) {
 563                         DBG_ERR("WARNING: Ignoring trailing value '%s' for parameter '%s'\n",
 564                                   algoname, sign_param);
 565                         continue;
 566                 }
 567
 568                 v32 = parse_enum_val(enum_smb3_signing_algorithms,
 569                                      sign_param, algoname);
 570                 if (v32 == INT32_MAX) {
 571                         continue;
 572                 }
 573                 algo = v32;
 574
 575                 for (di = 0; di < c.signing.num_algos; di++) {
 576                         if (algo != c.signing.algos[di]) {
 577                                 continue;
 578                         }
 579
 580                         ignore = true;
 581                         break;
 582                 }
 583
 584                 if (ignore) {
 585                         DBG_ERR("WARNING: Ignoring duplicate value '%s' for parameter '%s'\n",
 586                                   algoname, sign_param);
 587                         continue;
 588                 }
 589
 590                 c.signing.algos[c.signing.num_algos] = algo;
 591                 c.signing.num_algos += 1;
 592         }
 593
 594         for (ai = 0; encryption_algos != NULL && encryption_algos[ai] != NULL; ai++) {
 595                 const char *algoname = encryption_algos[ai];
 596                 int32_t v32;
 597                 uint16_t algo;
 598                 size_t di;
 599                 bool ignore = false;
 600
 601                 if (c.encryption.num_algos >= SMB3_ENCRYTION_CAPABILITIES_MAX_ALGOS) {
 602                         DBG_ERR("WARNING: Ignoring trailing value '%s' for parameter '%s'\n",
 603                                   algoname, enc_param);
 604                         continue;
 605                 }
 606
 607                 v32 = parse_enum_val(enum_smb3_encryption_algorithms,
 608                                      enc_param, algoname);
 609                 if (v32 == INT32_MAX) {
 610                         continue;
 611                 }
 612                 algo = v32;
 613
 614                 for (di = 0; di < c.encryption.num_algos; di++) {
 615                         if (algo != c.encryption.algos[di]) {
 616                                 continue;
 617                         }
 618
 619                         ignore = true;
 620                         break;
 621                 }
 622
 623                 if (ignore) {
 624                         DBG_ERR("WARNING: Ignoring duplicate value '%s' for parameter '%s'\n",
 625                                   algoname, enc_param);
 626                         continue;
 627                 }
 628
 629                 c.encryption.algos[c.encryption.num_algos] = algo;
 630                 c.encryption.num_algos += 1;
 631         }
 632
 633         return c;
 634 }
 635
 636 NTSTATUS smb311_capabilities_check(const struct smb311_capabilities *c,
 637                                    const char *debug_prefix,
 638                                    int debug_lvl,
 639                                    NTSTATUS error_status,
 640                                    const char *role,
 641                                    enum protocol_types protocol,
 642                                    uint16_t sign_algo,
 643                                    uint16_t cipher_algo)
 644 {
 645         const struct smb3_signing_capabilities *sign_algos =
 646                 &c->signing;
 647         const struct smb3_encryption_capabilities *ciphers =
 648                 &c->encryption;
 649         bool found_signing = false;
 650         bool found_encryption = false;
 651         size_t i;
 652
 653         for (i = 0; i < sign_algos->num_algos; i++) {
 654                 if (sign_algo == sign_algos->algos[i]) {
 655                         /*
 656                          * We found a match
 657                          */
 658                         found_signing = true;
 659                         break;
 660                 }
 661         }
 662
 663         for (i = 0; i < ciphers->num_algos; i++) {
 664                 if (cipher_algo == SMB2_ENCRYPTION_NONE) {
 665                         /*
 666                          * encryption not supported, we'll error out later
 667                          */
 668                         found_encryption = true;
 669                         break;
 670                 }
 671
 672                 if (cipher_algo == ciphers->algos[i]) {
 673                         /*
 674                          * We found a match
 675                          */
 676                         found_encryption = true;
 677                         break;
 678                 }
 679         }
 680
 681         if (!found_signing) {
 682                 /*
 683                  * We negotiated a signing algo we don't allow,
 684                  * most likely for SMB < 3.1.1
 685                  */
 686                 DEBUG(debug_lvl,("%s: "
 687                       "SMB3 signing algorithm[%u][%s] on dialect[%s] "
 688                       "not allowed by '%s smb3 signing algorithms' - %s.\n",
 689                       debug_prefix,
 690                       sign_algo,
 691                       smb3_signing_algorithm_name(sign_algo),
 692                       smb_protocol_types_string(protocol),
 693                       role,
 694                       nt_errstr(error_status)));
 695                 return error_status;
 696         }
 697
 698         if (!found_encryption) {
 699                 /*
 700                  * We negotiated a cipher we don't allow,
 701                  * most likely for SMB 3.0 and 3.0.2
 702                  */
 703                 DEBUG(debug_lvl,("%s: "
 704                       "SMB3 encryption algorithm[%u][%s] on dialect[%s] "
 705                       "not allowed by '%s smb3 encryption algorithms' - %s.\n",
 706                       debug_prefix,
 707                       cipher_algo,
 708                       smb3_encryption_algorithm_name(cipher_algo),
 709                       smb_protocol_types_string(protocol),
 710                       role,
 711                       nt_errstr(error_status)));
 712                 return error_status;
 713         }
 714
 715         return NT_STATUS_OK;
 716 }