root/source3/smbd/mangle_hash.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. has_valid_83_chars
  2. has_illegal_chars
  3. mangle_get_prefix
  4. is_valid_name
  5. is_8_3_w
  6. is_8_3
  7. init_chartest
  8. is_mangled
  9. mangle_reset
  10. cache_mangled_name
  11. lookup_name_from_8_3
  12. to_8_3
  13. must_mangle
  14. hash_name_to_8_3
  15. mangle_hash_init

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Name mangling
   4    Copyright (C) Andrew Tridgell 1992-2002
   5    Copyright (C) Simo Sorce 2001
   6    Copyright (C) Andrew Bartlett 2002
   7    Copyright (C) Jeremy Allison 2007
   8 
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13 
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18 
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22 
  23 #include "includes.h"
  24 #include "smbd/globals.h"
  25 
  26 /* -------------------------------------------------------------------------- **
  27  * Other stuff...
  28  *
  29  * magic_char     - This is the magic char used for mangling.  It's
  30  *                  global.  There is a call to lp_magicchar() in server.c
  31  *                  that is used to override the initial value.
  32  *
  33  * MANGLE_BASE    - This is the number of characters we use for name mangling.
  34  *
  35  * basechars      - The set characters used for name mangling.  This
  36  *                  is static (scope is this file only).
  37  *
  38  * mangle()       - Macro used to select a character from basechars (i.e.,
  39  *                  mangle(n) will return the nth digit, modulo MANGLE_BASE).
  40  *
  41  * chartest       - array 0..255.  The index range is the set of all possible
  42  *                  values of a byte.  For each byte value, the content is a
  43  *                  two nibble pair.  See BASECHAR_MASK below.
  44  *
  45  * ct_initialized - False until the chartest array has been initialized via
  46  *                  a call to init_chartest().
  47  *
  48  * BASECHAR_MASK  - Masks the upper nibble of a one-byte value.
  49  *
  50  * isbasecahr()   - Given a character, check the chartest array to see
  51  *                  if that character is in the basechars set.  This is
  52  *                  faster than using strchr_m().
  53  *
  54  */
  55 
  56 static const char basechars[43]="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_-!@#$%";
  57 #define MANGLE_BASE       (sizeof(basechars)/sizeof(char)-1)
  58 
  59 #define mangle(V) ((char)(basechars[(V) % MANGLE_BASE]))
  60 #define BASECHAR_MASK 0xf0
  61 #define isbasechar(C) ( (chartest[ ((C) & 0xff) ]) & BASECHAR_MASK )
  62 
  63 /* -------------------------------------------------------------------- */
  64 
  65 static NTSTATUS has_valid_83_chars(const smb_ucs2_t *s, bool allow_wildcards)
     /* [<][>][^][v][top][bottom][index][help] */
  66 {
  67         if (!*s) {
  68                 return NT_STATUS_INVALID_PARAMETER;
  69         }
  70 
  71         if (!allow_wildcards && ms_has_wild_w(s)) {
  72                 return NT_STATUS_UNSUCCESSFUL;
  73         }
  74 
  75         while (*s) {
  76                 if(!isvalid83_w(*s)) {
  77                         return NT_STATUS_UNSUCCESSFUL;
  78                 }
  79                 s++;
  80         }
  81 
  82         return NT_STATUS_OK;
  83 }
  84 
  85 static NTSTATUS has_illegal_chars(const smb_ucs2_t *s, bool allow_wildcards)
     /* [<][>][^][v][top][bottom][index][help] */
  86 {
  87         if (!allow_wildcards && ms_has_wild_w(s)) {
  88                 return NT_STATUS_UNSUCCESSFUL;
  89         }
  90 
  91         while (*s) {
  92                 if (*s <= 0x1f) {
  93                         /* Control characters. */
  94                         return NT_STATUS_UNSUCCESSFUL;
  95                 }
  96                 switch(*s) {
  97                         case UCS2_CHAR('\\'):
  98                         case UCS2_CHAR('/'):
  99                         case UCS2_CHAR('|'):
 100                         case UCS2_CHAR(':'):
 101                                 return NT_STATUS_UNSUCCESSFUL;
 102                 }
 103                 s++;
 104         }
 105 
 106         return NT_STATUS_OK;
 107 }
 108 
 109 /* return False if something fail and
 110  * return 2 alloced unicode strings that contain prefix and extension
 111  */
 112 
 113 static NTSTATUS mangle_get_prefix(const smb_ucs2_t *ucs2_string, smb_ucs2_t **prefix,
     /* [<][>][^][v][top][bottom][index][help] */
 114                 smb_ucs2_t **extension, bool allow_wildcards)
 115 {
 116         size_t ext_len;
 117         smb_ucs2_t *p;
 118 
 119         *extension = 0;
 120         *prefix = strdup_w(ucs2_string);
 121         if (!*prefix) {
 122                 return NT_STATUS_NO_MEMORY;
 123         }
 124         if ((p = strrchr_w(*prefix, UCS2_CHAR('.')))) {
 125                 ext_len = strlen_w(p+1);
 126                 if ((ext_len > 0) && (ext_len < 4) && (p != *prefix) &&
 127                     (NT_STATUS_IS_OK(has_valid_83_chars(p+1,allow_wildcards)))) /* check extension */ {
 128                         *p = 0;
 129                         *extension = strdup_w(p+1);
 130                         if (!*extension) {
 131                                 SAFE_FREE(*prefix);
 132                                 return NT_STATUS_NO_MEMORY;
 133                         }
 134                 }
 135         }
 136         return NT_STATUS_OK;
 137 }
 138 
 139 /* ************************************************************************** **
 140  * Return NT_STATUS_UNSUCCESSFUL if a name is a special msdos reserved name.
 141  * or contains illegal characters.
 142  *
 143  *  Input:  fname - String containing the name to be tested.
 144  *
 145  *  Output: NT_STATUS_UNSUCCESSFUL, if the condition above is true.
 146  *
 147  *  Notes:  This is a static function called by is_8_3(), below.
 148  *
 149  * ************************************************************************** **
 150  */
 151 
 152 static NTSTATUS is_valid_name(const smb_ucs2_t *fname, bool allow_wildcards, bool only_8_3)
     /* [<][>][^][v][top][bottom][index][help] */
 153 {
 154         smb_ucs2_t *str, *p;
 155         size_t num_ucs2_chars;
 156         NTSTATUS ret = NT_STATUS_OK;
 157 
 158         if (!fname || !*fname)
 159                 return NT_STATUS_INVALID_PARAMETER;
 160 
 161         /* . and .. are valid names. */
 162         if (strcmp_wa(fname, ".")==0 || strcmp_wa(fname, "..")==0)
 163                 return NT_STATUS_OK;
 164 
 165         if (only_8_3) {
 166                 ret = has_valid_83_chars(fname, allow_wildcards);
 167                 if (!NT_STATUS_IS_OK(ret))
 168                         return ret;
 169         }
 170 
 171         ret = has_illegal_chars(fname, allow_wildcards);
 172         if (!NT_STATUS_IS_OK(ret))
 173                 return ret;
 174 
 175         /* Name can't end in '.' or ' ' */
 176         num_ucs2_chars = strlen_w(fname);
 177         if (fname[num_ucs2_chars-1] == UCS2_CHAR('.') || fname[num_ucs2_chars-1] == UCS2_CHAR(' ')) {
 178                 return NT_STATUS_UNSUCCESSFUL;
 179         }
 180 
 181         str = strdup_w(fname);
 182 
 183         /* Truncate copy after the first dot. */
 184         p = strchr_w(str, UCS2_CHAR('.'));
 185         if (p) {
 186                 *p = 0;
 187         }
 188 
 189         strupper_w(str);
 190         p = &str[1];
 191 
 192         switch(str[0])
 193         {
 194         case UCS2_CHAR('A'):
 195                 if(strcmp_wa(p, "UX") == 0)
 196                         ret = NT_STATUS_UNSUCCESSFUL;
 197                 break;
 198         case UCS2_CHAR('C'):
 199                 if((strcmp_wa(p, "LOCK$") == 0)
 200                 || (strcmp_wa(p, "ON") == 0)
 201                 || (strcmp_wa(p, "OM1") == 0)
 202                 || (strcmp_wa(p, "OM2") == 0)
 203                 || (strcmp_wa(p, "OM3") == 0)
 204                 || (strcmp_wa(p, "OM4") == 0)
 205                 )
 206                         ret = NT_STATUS_UNSUCCESSFUL;
 207                 break;
 208         case UCS2_CHAR('L'):
 209                 if((strcmp_wa(p, "PT1") == 0)
 210                 || (strcmp_wa(p, "PT2") == 0)
 211                 || (strcmp_wa(p, "PT3") == 0)
 212                 )
 213                         ret = NT_STATUS_UNSUCCESSFUL;
 214                 break;
 215         case UCS2_CHAR('N'):
 216                 if(strcmp_wa(p, "UL") == 0)
 217                         ret = NT_STATUS_UNSUCCESSFUL;
 218                 break;
 219         case UCS2_CHAR('P'):
 220                 if(strcmp_wa(p, "RN") == 0)
 221                         ret = NT_STATUS_UNSUCCESSFUL;
 222                 break;
 223         default:
 224                 break;
 225         }
 226 
 227         SAFE_FREE(str);
 228         return ret;
 229 }
 230 
 231 static NTSTATUS is_8_3_w(const smb_ucs2_t *fname, bool allow_wildcards)
     /* [<][>][^][v][top][bottom][index][help] */
 232 {
 233         smb_ucs2_t *pref = 0, *ext = 0;
 234         size_t plen;
 235         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 236 
 237         if (!fname || !*fname)
 238                 return NT_STATUS_INVALID_PARAMETER;
 239 
 240         if (strlen_w(fname) > 12)
 241                 return NT_STATUS_UNSUCCESSFUL;
 242 
 243         if (strcmp_wa(fname, ".") == 0 || strcmp_wa(fname, "..") == 0)
 244                 return NT_STATUS_OK;
 245 
 246         /* Name cannot start with '.' */
 247         if (*fname == UCS2_CHAR('.'))
 248                 return NT_STATUS_UNSUCCESSFUL;
 249 
 250         if (!NT_STATUS_IS_OK(is_valid_name(fname, allow_wildcards, True)))
 251                 goto done;
 252 
 253         if (!NT_STATUS_IS_OK(mangle_get_prefix(fname, &pref, &ext, allow_wildcards)))
 254                 goto done;
 255         plen = strlen_w(pref);
 256 
 257         if (strchr_wa(pref, '.'))
 258                 goto done;
 259         if (plen < 1 || plen > 8)
 260                 goto done;
 261         if (ext && (strlen_w(ext) > 3))
 262                 goto done;
 263 
 264         ret = NT_STATUS_OK;
 265 
 266 done:
 267         SAFE_FREE(pref);
 268         SAFE_FREE(ext);
 269         return ret;
 270 }
 271 
 272 static bool is_8_3(const char *fname, bool check_case, bool allow_wildcards,
     /* [<][>][^][v][top][bottom][index][help] */
 273                    const struct share_params *p)
 274 {
 275         const char *f;
 276         smb_ucs2_t *ucs2name;
 277         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 278         size_t size;
 279         char magic_char;
 280 
 281         magic_char = lp_magicchar(p);
 282 
 283         if (!fname || !*fname)
 284                 return False;
 285         if ((f = strrchr(fname, '/')) == NULL)
 286                 f = fname;
 287         else
 288                 f++;
 289 
 290         if (strlen(f) > 12)
 291                 return False;
 292 
 293         if (!push_ucs2_allocate(&ucs2name, f, &size)) {
 294                 DEBUG(0,("is_8_3: internal error push_ucs2_allocate() failed!\n"));
 295                 goto done;
 296         }
 297 
 298         ret = is_8_3_w(ucs2name, allow_wildcards);
 299 
 300 done:
 301         SAFE_FREE(ucs2name);
 302 
 303         if (!NT_STATUS_IS_OK(ret)) {
 304                 return False;
 305         }
 306 
 307         return True;
 308 }
 309 
 310 /* -------------------------------------------------------------------------- **
 311  * Functions...
 312  */
 313 
 314 /* ************************************************************************** **
 315  * Initialize the static character test array.
 316  *
 317  *  Input:  none
 318  *
 319  *  Output: none
 320  *
 321  *  Notes:  This function changes (loads) the contents of the <chartest>
 322  *          array.  The scope of <chartest> is this file.
 323  *
 324  * ************************************************************************** **
 325  */
 326 
 327 static void init_chartest( void )
     /* [<][>][^][v][top][bottom][index][help] */
 328 {
 329         const unsigned char *s;
 330 
 331         chartest = SMB_MALLOC_ARRAY(unsigned char, 256);
 332 
 333         SMB_ASSERT(chartest != NULL);
 334 
 335         for( s = (const unsigned char *)basechars; *s; s++ ) {
 336                 chartest[*s] |= BASECHAR_MASK;
 337         }
 338 }
 339 
 340 /* ************************************************************************** **
 341  * Return True if the name *could be* a mangled name.
 342  *
 343  *  Input:  s - A path name - in UNIX pathname format.
 344  *
 345  *  Output: True if the name matches the pattern described below in the
 346  *          notes, else False.
 347  *
 348  *  Notes:  The input name is *not* tested for 8.3 compliance.  This must be
 349  *          done separately.  This function returns true if the name contains
 350  *          a magic character followed by excactly two characters from the
 351  *          basechars list (above), which in turn are followed either by the
 352  *          nul (end of string) byte or a dot (extension) or by a '/' (end of
 353  *          a directory name).
 354  *
 355  * ************************************************************************** **
 356  */
 357 
 358 static bool is_mangled(const char *s, const struct share_params *p)
     /* [<][>][^][v][top][bottom][index][help] */
 359 {
 360         char *magic;
 361         char magic_char;
 362 
 363         magic_char = lp_magicchar(p);
 364 
 365         if (chartest == NULL) {
 366                 init_chartest();
 367         }
 368 
 369         magic = strchr_m( s, magic_char );
 370         while( magic && magic[1] && magic[2] ) {         /* 3 chars, 1st is magic. */
 371                 if( ('.' == magic[3] || '/' == magic[3] || !(magic[3]))          /* Ends with '.' or nul or '/' ?  */
 372                                 && isbasechar( toupper_ascii(magic[1]) )           /* is 2nd char basechar?  */
 373                                 && isbasechar( toupper_ascii(magic[2]) ) )         /* is 3rd char basechar?  */
 374                         return( True );                           /* If all above, then true, */
 375                 magic = strchr_m( magic+1, magic_char );      /*    else seek next magic. */
 376         }
 377         return( False );
 378 }
 379 
 380 /***************************************************************************
 381  Initializes or clears the mangled cache.
 382 ***************************************************************************/
 383 
 384 static void mangle_reset( void )
     /* [<][>][^][v][top][bottom][index][help] */
 385 {
 386         /* We could close and re-open the tdb here... should we ? The old code did
 387            the equivalent... JRA. */
 388 }
 389 
 390 /***************************************************************************
 391  Add a mangled name into the cache.
 392  If the extension of the raw name maps directly to the
 393  extension of the mangled name, then we'll store both names
 394  *without* extensions.  That way, we can provide consistent
 395  reverse mangling for all names that match.  The test here is
 396  a bit more careful than the one done in earlier versions of
 397  mangle.c:
 398 
 399     - the extension must exist on the raw name,
 400     - it must be all lower case
 401     - it must match the mangled extension (to prove that no
 402       mangling occurred).
 403   crh 07-Apr-1998
 404 **************************************************************************/
 405 
 406 static void cache_mangled_name( const char mangled_name[13],
     /* [<][>][^][v][top][bottom][index][help] */
 407                                 const char *raw_name )
 408 {
 409         TDB_DATA data_val;
 410         char mangled_name_key[13];
 411         char *s1;
 412         char *s2;
 413 
 414         /* If the cache isn't initialized, give up. */
 415         if( !tdb_mangled_cache )
 416                 return;
 417 
 418         /* Init the string lengths. */
 419         safe_strcpy(mangled_name_key, mangled_name, sizeof(mangled_name_key)-1);
 420 
 421         /* See if the extensions are unmangled.  If so, store the entry
 422          * without the extension, thus creating a "group" reverse map.
 423          */
 424         s1 = strrchr( mangled_name_key, '.' );
 425         if( s1 && (s2 = strrchr( raw_name, '.' )) ) {
 426                 size_t i = 1;
 427                 while( s1[i] && (tolower_ascii( s1[i] ) == s2[i]) )
 428                         i++;
 429                 if( !s1[i] && !s2[i] ) {
 430                         /* Truncate at the '.' */
 431                         *s1 = '\0';
 432                         *s2 = '\0';
 433                 }
 434         }
 435 
 436         /* Allocate a new cache entry.  If the allocation fails, just return. */
 437         data_val = string_term_tdb_data(raw_name);
 438         if (tdb_store_bystring(tdb_mangled_cache, mangled_name_key, data_val, TDB_REPLACE) != 0) {
 439                 DEBUG(0,("cache_mangled_name: Error storing entry %s -> %s\n", mangled_name_key, raw_name));
 440         } else {
 441                 DEBUG(5,("cache_mangled_name: Stored entry %s -> %s\n", mangled_name_key, raw_name));
 442         }
 443 }
 444 
 445 /* ************************************************************************** **
 446  * Check for a name on the mangled name stack
 447  *
 448  *  Input:  s - Input *and* output string buffer.
 449  *          maxlen - space in i/o string buffer.
 450  *  Output: True if the name was found in the cache, else False.
 451  *
 452  *  Notes:  If a reverse map is found, the function will overwrite the string
 453  *          space indicated by the input pointer <s>.  This is frightening.
 454  *          It should be rewritten to return NULL if the long name was not
 455  *          found, and a pointer to the long name if it was found.
 456  *
 457  * ************************************************************************** **
 458  */
 459 
 460 static bool lookup_name_from_8_3(TALLOC_CTX *ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 461                                 const char *in,
 462                                 char **out, /* talloced on the given context. */
 463                                 const struct share_params *p)
 464 {
 465         TDB_DATA data_val;
 466         char *saved_ext = NULL;
 467         char *s = talloc_strdup(ctx, in);
 468         char magic_char;
 469 
 470         magic_char = lp_magicchar(p);
 471 
 472         /* If the cache isn't initialized, give up. */
 473         if(!s || !tdb_mangled_cache ) {
 474                 TALLOC_FREE(s);
 475                 return False;
 476         }
 477 
 478         data_val = tdb_fetch_bystring(tdb_mangled_cache, s);
 479 
 480         /* If we didn't find the name *with* the extension, try without. */
 481         if(data_val.dptr == NULL || data_val.dsize == 0) {
 482                 char *ext_start = strrchr( s, '.' );
 483                 if( ext_start ) {
 484                         if((saved_ext = talloc_strdup(ctx,ext_start)) == NULL) {
 485                                 TALLOC_FREE(s);
 486                                 return False;
 487                         }
 488 
 489                         *ext_start = '\0';
 490                         data_val = tdb_fetch_bystring(tdb_mangled_cache, s);
 491                         /*
 492                          * At this point s is the name without the
 493                          * extension. We re-add the extension if saved_ext
 494                          * is not null, before freeing saved_ext.
 495                          */
 496                 }
 497         }
 498 
 499         /* Okay, if we haven't found it we're done. */
 500         if(data_val.dptr == NULL || data_val.dsize == 0) {
 501                 TALLOC_FREE(saved_ext);
 502                 TALLOC_FREE(s);
 503                 return False;
 504         }
 505 
 506         /* If we *did* find it, we need to talloc it on the given ctx. */
 507         if (saved_ext) {
 508                 *out = talloc_asprintf(ctx, "%s%s",
 509                                         (char *)data_val.dptr,
 510                                         saved_ext);
 511         } else {
 512                 *out = talloc_strdup(ctx, (char *)data_val.dptr);
 513         }
 514 
 515         TALLOC_FREE(s);
 516         TALLOC_FREE(saved_ext);
 517         SAFE_FREE(data_val.dptr);
 518 
 519         return *out ? True : False;
 520 }
 521 
 522 /*****************************************************************************
 523  Do the actual mangling to 8.3 format.
 524 *****************************************************************************/
 525 
 526 static bool to_8_3(char magic_char, const char *in, char out[13], int default_case)
     /* [<][>][^][v][top][bottom][index][help] */
 527 {
 528         int csum;
 529         char *p;
 530         char extension[4];
 531         char base[9];
 532         int baselen = 0;
 533         int extlen = 0;
 534         char *s = SMB_STRDUP(in);
 535 
 536         extension[0] = 0;
 537         base[0] = 0;
 538 
 539         if (!s) {
 540                 return False;
 541         }
 542 
 543         p = strrchr(s,'.');
 544         if( p && (strlen(p+1) < (size_t)4) ) {
 545                 bool all_normal = ( strisnormal(p+1, default_case) ); /* XXXXXXXXX */
 546 
 547                 if( all_normal && p[1] != 0 ) {
 548                         *p = 0;
 549                         csum = str_checksum( s );
 550                         *p = '.';
 551                 } else
 552                         csum = str_checksum(s);
 553         } else
 554                 csum = str_checksum(s);
 555 
 556         strupper_m( s );
 557 
 558         if( p ) {
 559                 if( p == s )
 560                         safe_strcpy( extension, "___", 3 );
 561                 else {
 562                         *p++ = 0;
 563                         while( *p && extlen < 3 ) {
 564                                 if ( *p != '.') {
 565                                         extension[extlen++] = p[0];
 566                                 }
 567                                 p++;
 568                         }
 569                         extension[extlen] = 0;
 570                 }
 571         }
 572 
 573         p = s;
 574 
 575         while( *p && baselen < 5 ) {
 576                 if (isbasechar(*p)) {
 577                         base[baselen++] = p[0];
 578                 }
 579                 p++;
 580         }
 581         base[baselen] = 0;
 582 
 583         csum = csum % (MANGLE_BASE*MANGLE_BASE);
 584 
 585         memcpy(out, base, baselen);
 586         out[baselen] = magic_char;
 587         out[baselen+1] = mangle( csum/MANGLE_BASE );
 588         out[baselen+2] = mangle( csum );
 589 
 590         if( *extension ) {
 591                 out[baselen+3] = '.';
 592                 safe_strcpy(&out[baselen+4], extension, 3);
 593         }
 594 
 595         SAFE_FREE(s);
 596         return True;
 597 }
 598 
 599 static bool must_mangle(const char *name,
     /* [<][>][^][v][top][bottom][index][help] */
 600                         const struct share_params *p)
 601 {
 602         smb_ucs2_t *name_ucs2 = NULL;
 603         NTSTATUS status;
 604         size_t converted_size;
 605         char magic_char;
 606 
 607         magic_char = lp_magicchar(p);
 608 
 609         if (!push_ucs2_allocate(&name_ucs2, name, &converted_size)) {
 610                 DEBUG(0, ("push_ucs2_allocate failed!\n"));
 611                 return False;
 612         }
 613         status = is_valid_name(name_ucs2, False, False);
 614         SAFE_FREE(name_ucs2);
 615         return NT_STATUS_IS_OK(status);
 616 }
 617 
 618 /*****************************************************************************
 619  * Convert a filename to DOS format.  Return True if successful.
 620  *  Input:  in        Incoming name.
 621  *
 622  *          out       8.3 DOS name.
 623  *
 624  *          cache83 - If False, the mangled name cache will not be updated.
 625  *                    This is usually used to prevent that we overwrite
 626  *                    a conflicting cache entry prematurely, i.e. before
 627  *                    we know whether the client is really interested in the
 628  *                    current name.  (See PR#13758).  UKD.
 629  *
 630  * ****************************************************************************
 631  */
 632 
 633 static bool hash_name_to_8_3(const char *in,
     /* [<][>][^][v][top][bottom][index][help] */
 634                         char out[13],
 635                         bool cache83,
 636                         int default_case,
 637                         const struct share_params *p)
 638 {
 639         smb_ucs2_t *in_ucs2 = NULL;
 640         size_t converted_size;
 641         char magic_char;
 642 
 643         magic_char = lp_magicchar(p);
 644 
 645         DEBUG(5,("hash_name_to_8_3( %s, cache83 = %s)\n", in,
 646                  cache83 ? "True" : "False"));
 647 
 648         if (!push_ucs2_allocate(&in_ucs2, in, &converted_size)) {
 649                 DEBUG(0, ("push_ucs2_allocate failed!\n"));
 650                 return False;
 651         }
 652 
 653         /* If it's already 8.3, just copy. */
 654         if (NT_STATUS_IS_OK(is_valid_name(in_ucs2, False, False)) &&
 655                                 NT_STATUS_IS_OK(is_8_3_w(in_ucs2, False))) {
 656                 SAFE_FREE(in_ucs2);
 657                 safe_strcpy(out, in, 12);
 658                 return True;
 659         }
 660 
 661         SAFE_FREE(in_ucs2);
 662         if (!to_8_3(magic_char, in, out, default_case)) {
 663                 return False;
 664         }
 665 
 666         cache_mangled_name(out, in);
 667 
 668         DEBUG(5,("hash_name_to_8_3(%s) ==> [%s]\n", in, out));
 669         return True;
 670 }
 671 
 672 /*
 673   the following provides the abstraction layer to make it easier
 674   to drop in an alternative mangling implementation
 675 */
 676 static const struct mangle_fns mangle_hash_fns = {
 677         mangle_reset,
 678         is_mangled,
 679         must_mangle,
 680         is_8_3,
 681         lookup_name_from_8_3,
 682         hash_name_to_8_3
 683 };
 684 
 685 /* return the methods for this mangling implementation */
 686 const struct mangle_fns *mangle_hash_init(void)
     /* [<][>][^][v][top][bottom][index][help] */
 687 {
 688         mangle_reset();
 689 
 690         /* Create the in-memory tdb using our custom hash function. */
 691         tdb_mangled_cache = tdb_open_ex("mangled_cache", 1031, TDB_INTERNAL,
 692                                 (O_RDWR|O_CREAT), 0644, NULL, fast_string_hash);
 693 
 694         return &mangle_hash_fns;
 695 }

/* [<][>][^][v][top][bottom][index][help] */